FeaturesScrew jacks are transmission products (machine screws or ball screws) that make rotary motion using gearbox assemblies (worm gears or bevel gears) and motors. They can be used to push, pull, tension, unlock, tilt, rotate, pull, raise or lower loads ranging from a few kilos to several thousand tons. The key components of screw jacks are trapezoidal lifting screw, worm screw, worm gear and gear housing. Worm screw is rotated manually (manual screw jack) or by a motor (electric screw jack). The screw jack working principle: Worm screw rotate the worm gear; the rotating worm gear move the lifting screw up and down in linear motion way. If input a small rotation force on worm screw, it can amplify force from lifting screw shaft. This mechanical advantage property is good for raising and lowering maintenance platforms, opening and closing air dampers, oven doors, sluice gates, adjusting tooling machine beds.Screw jacks are a combination of a screw with a gearbox. There are 3 types of configurations that can be adapted to different requirements:Translating screw design: The screw moves when the gearbox input shaft (worm shaft end) is activated. It includes a rounded screw protection tube on the back.Anti-rotating keyed screw design: The screw engages, as in configuration translating screw design but with the difference that the screw with milled keyway, or the back protective tube is square section.Rotating screw design: The screw does not move with the driving of the worm shaft, it only turns; it is the corresponding travel nut that moves along the screw.Compact Cubic Screw Jacks JTC2.5 (2.5 kN) to JTC500 (500 kN)* Self locking lifting screw, precise positioning, and uniform speed. * Available in 11 sizes from JTC2.5 to JTC500.* Static load capacity from 2.5 kN to 500 kN.* Lifting screw diameter from 14 mm to 120 mm.* Standard lifting screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Keyed for non-rotating, and Rotating designs.* Each Model has TWO gear ratios, they are High ratio, Slow ratio. * Standard with 1-start lifting screw, custom 2-starts lifting screw which offers increased travel speed and require a brake or external locking device to hold position.* Custom-made lifting screw diameter and pitch, gear ratios, and worm shaft sizes.* Lifting Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Can be applied either individually use or combined into a exactly synchronized lifting system, linked by connecting shafts, bevel gearboxes, motor adapters, limit switches, geared motor and couplings etc.* Custom-made double clevis screw jack, anti-backlash screw jack.* Can be used as alternatives to hydraulic and pneumatic systems.Materials:* Housing(Gearbox): Aluminium Alloy (JTC2.5, JTC5, JTC10, JTC25). Ductile Iron (JTC25, JTC50, JTC100, JTC150, JTC200, JTC250, JTC350, JTC500).* Lifting Screw: Carbon steel #45. Custom stainless steel.* Worm(Input Shaft): Hardened worm, carbon steel #45. Custom stainless steel.* Worm Gear(Wheel): High strength bronze.* Travelling Nut and Safety Nut: High strength bronze. Machine Screw Jacks JTW-1T (1 Ton) to JTW-100T (100 Ton)* Self locking MACHINE screw, precise positioning, and uniform speed. * Available in 10 sizes from JTW-1T to JTW-100T.* Static load capacity from 1 Ton to 100 Ton.* Machine screw diameter from 24 mm to 160 mm.* Standard machine screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Keyed for non-rotating, and Rotating designs.* Models JTW-1T to JTW-10T/15T have THREE gear ratios (High ratio, Medium ratio, Slow ratio). Models JTW-20T to JTW-100T have TWO gear ratios (High ratio, Slow ratio). * Standard with 1-start machine screw, custom 2-starts machine screw which offers increased travel speed and require a brake or external locking device to hold position.* Custom-made machine screw diameter and pitch, gear ratios, and worm shaft sizes.* Machine Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.* Custom-made double clevis screw jack, anti-backlash screw jack.* Can be used as alternatives to hydraulic and pneumatic systems.Materials:* Machine Screw: Carbon steel #45. Custom stainless steel.* Worm(Input Shaft): Hardened worm, carbon steel #45. Custom stainless steel.* Worm Gear(Wheel): High strength bronze.* Travelling Nut and Safety Nut: High strength bronze.* Housing(Gearbox): Ductile Iron or Stainless steel, available in both of them. Trapezoidal Screw Jacks JT-0.5T (0.5 Ton) to JT-100T (100 Ton)* Self locking Trapezoidal screw, precise positioning, and uniform speed. * Available in 12 sizes from JT-0.5T to JT-100T.* Static load capacity from 0.5 Ton to 100 Ton.* Trapezoidal screw diameter from 20 mm to 100 mm.* Standard Trapezoidal screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Factory spare part transmission gearbox Keyed for non-rotating, and Rotating designs.* Each Model has THREE gear ratios, they are High ratio, Medium ratio, Slow ratio.* Standard with 1-start Trapezoidal screw, custom 2-starts Trapezoidal screw which offers increased travel speed and require a brake or external locking device to hold position.* Custom-made Trapezoidal screw diameter and pitch, gear ratios, and worm shaft sizes.* Trapezoidal Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.* Custom-made double clevis screw jack, anti-backlash screw jack.* Can be used as alternatives to hydraulic and pneumatic systems.Materials:* Trapezoidal Screw: Carbon steel #45. Custom stainless steel.* Worm(Input Shaft): Hardened worm, carbon steel #45. Custom stainless steel.* Worm Gear(Wheel): High strength bronze.* Travelling Nut and Safety Nut: High strength bronze.* Housing(Gearbox): Ductile Iron Ball Screw Jacks JTB-1T (1 Ton) to JTB-35T (35 Ton)* High accuracy ball screw, high efficiency, high performance, high duty cycle, low backlash, long service life, and uniform lifting speed* Available in 7 sizes from JTB-1T to JTB-35T.* Maximum static load capacity from 1 Ton to 35 Ton.* Ball screw diameter from 20 mm to 100 mm.* Standard ball screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Ant-rotation, and Rotating designs.* Models JTB-1T to JTB-10T have THREE gear ratios (High ratio, Medium ratio, Slow ratio). Models JTB-20T to JTB-35T have TWO gear ratios (High ratio, Slow ratio). * Standard with 1-start ball screw, custom 2-starts ball screw which offers increased travel speed. Both of them require a brake or external locking device to hold position.* Custom-made machine screw diameter and pitch, gear ratios, and worm shaft sizes.* Ball Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.* Custom-made double clevis screw jack, anti-backlash screw jack.* Can be used as alternatives to hydraulic and pneumatic systems.Materials:* Ball Screw: SCM 450, S55C, Hardness: HRC 58-62 * Ball Nut: SCM415H, Hardness: HRC 58-62 * Steel Ball: SUJ2, Hardness: HRC 60 UP* Worm(Input Shaft): Hardened worm, carbon steel #45. Custom stainless steel.* Worm Gear(Wheel): High strength bronze.* Travelling Nut: High strength bronze.* Housing(Gearbox): Ductile Iron or Stainless steel, available in both of them. Stainless Steel Screw Jacks JSS-1T (1 Ton) to JSS-20T (20 Ton)* Self locking stainless steel screw, precise positioning, and uniform speed. * Available in 5 sizes from JSS-1T to JSS-20T.* Static load capacity from 1 Ton to 20 Ton.* Stainless screw diameter from 24 mm to 65 mm.* Standard stainless screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Keyed for non-rotating, and Rotating designs.* Models JSS-1T to JSS-20T have THREE gear ratios (High ratio, Medium ratio, Slow ratio). * Standard with 1-start stainless screw, custom 2-starts stainless screw which offers increased travel speed and require a brake or external locking device to hold position.* Custom-made stainless screw diameter and pitch, gear ratios, and worm shaft sizes.* Stainless Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.* Custom-made double clevis stainless steel screw jack, anti-backlash stainless steel screw jack.* Can be used as alternatives to hydraulic and pneumatic systems. Materials:* Lifting Screw: Stainless steel #304. Custom stainless steel #316.* Worm(Input Shaft): Hardened worm, stainless steel #304. Custom stainless steel #316.* Worm Gear(Wheel): High strength bronze.* Travelling Nut and Safety Nut: High strength bronze.* Housing(Gearbox): Stainless steel #304.* All Covers of Housing(Gearbox): Stainless steel #304. Custom stainless steel #316.* Bearings: Bearing steel as standard. Custom stainless steel #304. * Lifting Screw Ends: Stainless steel #304. Custom stainless steel #316.* Motor Flanges: Stainless steel #304. Custom stainless steel #316.* Protective tube: Stainless steel #304. Custom stainless steel #316.* Locking screws and Keys: Stainless steel #304. Custom stainless steel #316. High Speed Bevel Gear Screw Jacks JTG19 to JTG40* Higher efficiency, higher lifting speed, higher duty cycle, longer lifespan* Available in 4 sizes from JTG19 to JTG40 (trapezoidal screw), and 4 sizes from JTGB19 to JTGB40 (ball screw). * Static load capacity from 3000 kgf to 15000 kgf. Dynamic load capacity from 1000 kgf to 2600 kgf. * Trapezoidal screw diameter from 32 mm to 63 mm. Ball screw diameter from 32 mm to 63 mm. * There are no “standard” travel lengths. Standard trapezoidal/ball screw maximum length 6000 mm, custom longer stroke.* Upright or Inverted mounting. Available in tension or compression loads.* Translating, Keyed for non-rotating, and Rotating designs.* Each size is available with 1 ratio, 250 ATV shaft driven chinese farm atv 250cc quad bike 2.5:1 – 3:1. * Standard with 1-start trapezoidal/ball screw, custom 2-starts trapezoidal screw/ball which offers increased travel speed and require a brake or external locking device to hold position.* Custom-made trapezoidal/ball screw diameter and pitch, gear ratios, and worm shaft sizes.* Trapezoidal/Ball Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.* Can be operated by manually operated or by electrical motor driven.* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.* Optimal for low-speed operation: The driving system has less noise because machinery can be driven at a lower input speed.* Simple and effective solution in comparison with hydraulic and pneumatic systems. Materials:* Spiral Bevel Gears: Lapped together in pairs, high quality alloy steel, case hardened.* Trapezoidal Screw: Carbon steel #45. Custom stainless steel.* Ball Screw: SCM 450, S55C, Hardness: HRC 58-62 * Ball Nut: SCM415H, Hardness: HRC 58-62* Steel Ball: SUJ2, Hardness: HRC 60 UP* Input Shaft: Hardened, alloy steel. Custom stainless steel.* Drive Sleeve: High strength bronze.* Travelling Nut and Safety Nut: High strength bronze.* Housing(Gearbox): Ductile Iron. Hand Wheel Manual Screw Jack 1 Ton to 20 TonHand wheels in a variety of diameters. They are recommended for self-locking jacks and actuators and can be mounted directly to the jack input shaft. Since hand wheels are are mounted directly CZPT jacks and actuators and specified as part of the complete jack part number. Their specific selection is dependent on input torque requirements.A hand wheel is a convenient solution for manually operating a jack when using machine screw jacks in intermittent positioning applications. Hand wheels are available in a range of diameters from 5 to 16 inches and can be adapted for use on jacks up to the 20 tons capacity model.NOTE: Hand wheels do not include a brake and therefore are not for use with ball screw jacks. When using hand wheels with a jack that can back drive (12:1 and lower) an additional locking mechanism may be required to prevent “creep”. Electric Motorized Screw Jack 1 Ton to 100 TonScrew jacks can be connected directly to an electric motor creating a compact linear drive. Standard 3 phase motors are most common. For lower powers DC motors can be used, or servo motors can achieve high performance.Electric Screw Jack can also be called motorized screw jack, it includes a worm gear screw jack and an electric motor.The screw jack can be self-locking CZPT screw jack or high precision ball screw jack.The motor can be high precision servo motor,stepper motor,helical gear motor, worm gear motor, 3-phase asynchronous motor and 12v,24v,48v do motor and dc gear motor etc.Electric Screw jack lift Function: The Electric screw jack actuator is a basis jack-up part, accomplish the functions such as lifting, drop, push and inverting through worm gear drives screw, because it is driven by electric motor, it has higher efficiency than manual screw jack. Screw Jack Lifting System 0.1 Ton to 1000 TonWorm Gear Screw Jack systems are ruggedly designed and produced in standard models with load handling capacities from 1 ton to 100 tons. They may be used individually or in multiple arrangements. There are no “standard” travel lengths and all Worm Gear Screw Jack systems are built to specification. The jack housings are made of ductile iron and proportioned to support the rated capacity of the unit. Screw Jack System is usually used for lifting heavy duty load or lifting platform. Screw Jack System mainly includes screw jack, bevel gearbox, electric motor, connecting rod coupling, gear reducer. Clients can choose 2 screw jacks system, 3 screw jacks system, 4 screw jacks system, 6 screw jacks system, 8 screw jacks system for your practical application. We can offer a complete screw jack system including electric motor, gear reducer and so on. Before clients place orders, our engineers provide 2D CAD or 3D drawings for final confirmation. Note: When the screw jacks travel stroke is too long, we advise the clients to use a CZPT post.Screw Jack System EfficiencyTwo screw jacks lift system, I and T configuration,, transmission efficiency 95% Three screw jacks lift system, I and T configuration, transmission efficiency 90%Four screw jacks lift system, H, U and T configuration, transmission efficiency 85%Six screw jacks lift system, 2H and U configuration, transmission efficiency 80%Eight screw jacks lift system, 2H and H configuration, transmission efficiency 80%Notes: don’t ignore bevel gearbox efficiency 98%. Packaging & ShippingShipping:1. CZPT freight: seaport to seaport, price terms CIF, FOB, EXW, CFR etc.2. Air freight: airport to airport, price terms EXW, CRF etc.3. Air courier: DHL, FEDEX, UPS, TNT door to door shipment, price terms DDU, CPT etc.Packing: 100% standard exporting plywood cases.
Note: International Exporting Standard Wooden Material with Free Fumigation.
Our Advantages* One of the biggest orders with 1750 units screw jacks.* Standard products with 2D Drawings(DXF, DWG, PDF) and 3D CAD Model(STEP).* 100% quality assured with double quality inspections. Original Inspection Reports, Operation Manual, and Book Catalogue are put into the packages. * 100% safety transportation with strong standard export plywood cases materials (free fumigation). * International standard materials for all standard products. * Custom design available, OEM service available, Aluminium Housing RV Series worm gear speed gearbox aluminum worm gear motor worm gear transmission manufacture Free engineering advice and Customer label available.
Finished Projects1. Theatrical solutions stage and orchestra platform lifts projects. Customers are from France, Australia, Netherlands, United Kingdom, Spain and Canada. 2. Hydroelectric power station projects and water conservancy projects. Customers are from Vietnam, Australia, Malaysia, Belgium, United States and United Kingdom. 3. Aircraft maintenance platforms and docking systems projects. Customers are from Singapore. 4. Solar panel tracking system projects. Customers are from Spain, India and Canada. 5. Bolted steel storage tanks and silos lifting solutions. Customers are from South Africa, United States, Mexico and Vietnam. 6. Dish antenna elevation and azimuth positioning projects. Customers are from Singapore, Malaysia and United States. 7. Railway wagon projects. Customers are from South Africa. 8. Beverage can production lines. Customers are from Netherlands, United States, Thailand and Indonesia. 9. Steel factories production lines. Customers are from United States. 10. Continuous PU sandwich panel production lines. Customers are from Thailand and United Kingdom.
Other Products* Manual Screw Jacks.* Electric Screw Jacks.* Worm Gear Screw Jacks Series.* Bevel Gear Screw Jack Series.* Electric Cylinders Series.* Spiral Bevel Gearboxes Series.* Lifting Systems and Accessories.* Electric Linear Actuators Series.* Geared Motor and Gear Reducers Series.
Clients Countries1. American Countries: United States, Mexico, Canada, Chile.2. European Countries: Germany, France, United Kingdom, Italy, Spain, Poland, Romania, Netherlands, Belgium, Greece, Czech Republic, Portugal, Sweden, Hungary, Austria, Switzerland, Bulgaria, Denmark, Finland, Slovakia, Norway, Ireland, Georgia, Slovenia.3. Asian Countries: Malaysia, Indonesia, Singapore, Philippines, Vietnam, Thailand, India, Israel.4. Oceanian Countries: Australia, New Zealand.5. African Countries: South Africa, Egypt.
Contact InformationJACTON INDUSTRY Co., Ltd (VAT No.: 9144190007026567X3) is 1 of the leading companies in the field of Screw Jacks(Mechanical Actuators), Bevel Gearboxes, Lifting Systems, Linear Actuators, Gearmotors and Speed Reducers. We are an audited professional manufacturer and supplier by SGS (Serial NO.: QIP-ASI192186) and BV (Serial NO.: MIC-ASR257162) organizations. We have a strict quality system, with senior engineers, experienced skilled workers and practiced sales teams, and consistently provide the customers with the best engineered solution for precision linear actuation, power transmission and mechanical jacking systems. CZPT Industry guarantees quality, reliability, performance and value for today′s demanding industrial applications.
FAQ
1. What type of payment methods do you accept?
We accept Wire transfer, Credit Card, Paypal, Alibaba Trade Assurance order, Western Union and L/C etc.
2. Can I get 1 sample to test?
Yes, sample can be at a normal price and welcomed. The transport fees are at your account.
3. How about the quality of your product?
Jacton industry is only focus on the field of Screw Jacks(Mechanical Actuators), Bevel Gearboxes, Lifting Systems, Linear Actuators, Gearmotors and Speed Reducers. 4. OEM/ODM Accepted?
Yes, Please send you new product drawings or sample to us if you have, and we can custom-made as your required. We will also provide professional advices of the products to make the design to be maximize the performance.
5. If you can not find the product on our website,how do you do?
Please send us inquiry with product pictures and drawings by email or other ways you prefer, we’ll check if we could produce.
6. Can I trust you?
Absolutely yes. Samples could be provided to test firstly, and we can use Alibaba trade assurance service to do business to guarantee both the seller and buyer’ Transmission Front Drive Shaft kit U Yoke Universal Joint U-joint For Pto Shaft s benefit, and we are golden supplier for years.
7. What’s our products warranty?One year quality guarantee for the products from your purchase date, except the human damage
Calculating the Deflection of a Worm Shaft
In this article, we’ll discuss how to calculate the deflection of a worm gear’s worm shaft. We’ll also discuss the characteristics of a worm gear, including its tooth forces. And we’ll cover the important characteristics of a worm gear. Read on to learn more! Here are some things to consider before purchasing a worm gear. We hope you enjoy learning! After reading this article, you’ll be well-equipped to choose a worm gear to match your needs.
Calculation of worm shaft deflection
The main goal of the calculations is to determine the deflection of a worm. Worms are used to turn gears and mechanical devices. This type of transmission uses a worm. The worm diameter and the number of teeth are inputted into the calculation gradually. Then, a table with proper solutions is shown on the screen. After completing the table, you can then move on to the main calculation. You can change the strength parameters as well.
The maximum worm shaft deflection is calculated using the finite element method (FEM). The model has many parameters, including the size of the elements and boundary conditions. The results from these simulations are compared to the corresponding analytical values to calculate the maximum deflection. The result is a table that displays the maximum worm shaft deflection. The tables can be downloaded below. You can also find more information about the different deflection formulas and their applications.
The calculation method used by DIN EN 10084 is based on the hardened cemented worm of 16MnCr5. Then, you can use DIN EN 10084 (CuSn12Ni2-C-GZ) and DIN EN 1982 (CuAl10Fe5Ne5-C-GZ). Then, you can enter the worm face width, either manually or using the auto-suggest option.
Common methods for the calculation of worm shaft deflection provide a good approximation of deflection but do not account for geometric modifications on the worm. While Norgauer’s 2021 approach addresses these issues, it fails to account for the helical winding of the worm teeth and overestimates the stiffening effect of gearing. More sophisticated approaches are required for the efficient design of thin worm shafts.
Worm gears have a low noise and vibration compared to other types of mechanical devices. However, worm gears are often limited by the amount of wear that occurs on the softer worm wheel. Worm shaft deflection is a significant influencing factor for noise and wear. The calculation method for worm gear deflection is available in ISO/TR 14521, DIN 3996, and AGMA 6022.
The worm gear can be designed with a precise transmission ratio. The calculation involves dividing the transmission ratio between more stages in a gearbox. Power transmission input parameters affect the gearing properties, as well as the material of the worm/gear. To achieve a better efficiency, the worm/gear material should match the conditions that are to be experienced. The worm gear can be a self-locking transmission.
The worm gearbox contains several machine elements. The main contributors to the total power loss are the axial loads and bearing losses on the worm shaft. Hence, different bearing configurations are studied. One type includes locating/non-locating bearing arrangements. The other is tapered roller bearings. The worm gear drives are considered when locating versus non-locating bearings. The analysis of worm gear drives is also an investigation of the X-arrangement and four-point contact bearings.
Influence of tooth forces on bending stiffness of a worm gear
The bending stiffness of a worm gear is dependent on tooth forces. Tooth forces increase as the power density increases, but this also leads to increased worm shaft deflection. The resulting deflection can affect efficiency, wear load capacity, and NVH behavior. Continuous improvements in bronze materials, lubricants, and manufacturing quality have enabled worm gear manufacturers to produce increasingly high power densities.
Standardized calculation methods take into account the supporting effect of the toothing on the worm shaft. However, overhung worm gears are not included in the calculation. In addition, the toothing area is not taken into account unless the shaft is designed next to the worm gear. Similarly, the root diameter is treated as the equivalent bending diameter, but this ignores the supporting effect of the worm toothing.
A generalized formula is provided to estimate the STE contribution to vibratory excitation. The results are applicable to any gear with a meshing pattern. It is recommended that engineers test different meshing methods to obtain more accurate results. One way to test tooth-meshing surfaces is to use a finite element stress and mesh subprogram. This software will measure tooth-bending stresses under dynamic loads.
The effect of tooth-brushing and lubricant on bending stiffness can be achieved by increasing the pressure angle of the worm pair. This can reduce tooth bending stresses in the worm gear. A further method is to add a load-loaded tooth-contact analysis (CCTA). This is also used to analyze mismatched ZC1 worm drive. The results obtained with the technique have been widely applied to various types of gearing.
In this study, we found that the ring gear’s bending stiffness is highly influenced by the teeth. The chamfered root of the ring gear is larger than the slot width. Thus, the ring gear’s bending stiffness varies with its tooth width, which increases with the ring wall thickness. Furthermore, a variation in the ring wall thickness of the worm gear causes a greater deviation from the design specification.
To understand the impact of the teeth on the bending stiffness of a worm gear, it is important to know the root shape. Involute teeth are susceptible to bending stress and can break under extreme conditions. A tooth-breakage analysis can control this by determining the root shape and the bending stiffness. The optimization of the root shape directly on the final gear minimizes the bending stress in the involute teeth.
The influence of tooth forces on the bending stiffness of a worm gear was investigated using the CZPT Spiral Bevel Gear Test Facility. In this study, multiple teeth of a spiral bevel pinion were instrumented with strain gages and tested at speeds ranging from static to 14400 RPM. The tests were performed with power levels as high as 540 kW. The results obtained were compared with the analysis of a three-dimensional finite element model.
Characteristics of worm gears
Worm gears are unique types of gears. They feature a variety of characteristics and applications. This article will examine the characteristics and benefits of worm gears. Then, we’ll examine the common applications of worm gears. Let’s take a look! Before we dive in to worm gears, let’s review their capabilities. Hopefully, you’ll see how versatile these gears are.
A worm gear can achieve massive reduction ratios with little effort. By adding circumference to the wheel, the worm can greatly increase its torque and decrease its speed. Conventional gearsets require multiple reductions to achieve the same reduction ratio. Worm gears have fewer moving parts, so there are fewer places for failure. However, they can’t reverse the direction of power. This is because the friction between the worm and wheel makes it impossible to move the worm backwards.
Worm gears are widely used in elevators, hoists, and lifts. They are particularly useful in applications where stopping speed is critical. They can be incorporated with smaller brakes to ensure safety, but shouldn’t be relied upon as a primary braking system. Generally, they are self-locking, so they are a good choice for many applications. They also have many benefits, including increased efficiency and safety.
Worm gears are designed to achieve a specific reduction ratio. They are typically arranged between the input and output shafts of a motor and a load. The two shafts are often positioned at an angle that ensures proper alignment. Worm gear gears have a center spacing of a frame size. The center spacing of the gear and worm shaft determines the axial pitch. For instance, if the gearsets are set at a radial distance, a smaller outer diameter is necessary.
Worm gears’ sliding contact reduces efficiency. But it also ensures quiet operation. The sliding action limits the efficiency of worm gears to 30% to 50%. A few techniques are introduced herein to minimize friction and to produce good entrance and exit gaps. You’ll soon see why they’re such a versatile choice for your needs! So, if you’re considering purchasing a worm gear, make sure you read this article to learn more about its characteristics!
An embodiment of a worm gear is described in FIGS. 19 and 20. An alternate embodiment of the system uses a single motor and a single worm 153. The worm 153 turns a gear which drives an arm 152. The arm 152, in turn, moves the lens/mirr assembly 10 by varying the elevation angle. The motor control unit 114 then tracks the elevation angle of the lens/mirr assembly 10 in relation to the reference position.
The worm wheel and worm are both made of metal. However, the brass worm and wheel are made of brass, which is a yellow metal. Their lubricant selections are more flexible, but they’re limited by additive restrictions due to their yellow metal. Plastic on metal worm gears are generally found in light load applications. The lubricant used depends on the type of plastic, as many types of plastics react to hydrocarbons found in regular lubricant. For this reason, you need a non-reactive lubricant.
