Speed reducer

Abstract

The utility model relates to the technical field, in particular to a speed reducer which comprises an integrated gear ring, an input flange, an output shaft, a first inner shell, a second inner shell, a plurality of first transmission units and a plurality of second transmission units. The first inner shell and the second inner shell are each provided with a plurality of first grooves. When the planet wheel rotates, the first inner shell and the second inner shell are replaced by the two end face needle bearings, the two end face needle bearings make contact with the front end and the rear end of the planet wheel, then the contact area of the planet wheel during rotation is reduced, friction force is reduced, and the two end face needle bearings rotate and are matched in the corresponding first grooves. According to the device, through the arrangement of the end face needle bearings, friction of the planet wheels is reduced, the temperature of the device during operation is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a speed reducer. Background Technology

[0002] A speed reducer is a mechanical transmission device used to reduce the output speed of a power source (such as a motor or engine) while increasing the output torque.

[0003] It is widely used in industries, transportation, energy and other fields, and is an indispensable core component in mechanical equipment.

[0004] However, in the aforementioned prior art, the friction is too great when the planetary gears inside the current reducer rotate, resulting in excessively high internal temperature of the reducer and thus a shortened lifespan. Utility Model Content

[0005] The purpose of this invention is to provide a speed reducer that solves the problem in the current technology where excessive friction occurs when the planetary gears inside the speed reducer rotate, leading to excessively high internal temperature and thus shortened lifespan.

[0006] To achieve the above objectives, this utility model provides a speed reducer, including an integrated gear ring, an input flange, an output shaft, a first inner shell, a second inner shell, multiple first transmission units and a second transmission unit. Each first transmission unit includes a planetary gear, a pin, multiple needle rollers, and two first end-face needle roller bearings. Both the first and second inner shells have multiple first grooves. The output shaft is fixedly connected to the outer wall of the first inner shell. The first and second inner shells are adapted to each other. Multiple needle rollers are respectively disposed inside the planetary gears. The pin is inserted into the planetary gears, and multiple needle rollers are respectively sleeved on the outside of the pin. The two end-face needle roller bearings are respectively disposed in the corresponding first grooves and contact the planetary gears. The input flange is disposed on the outside of the second inner shell.

[0007] The second transmission unit includes an input gear shaft, two second end-face needle roller bearings, and two first deep groove ball bearings. The outer wall of the second inner housing and the integral gear ring both have second grooves. The input gear shaft passes through the second inner housing and is located between multiple first transmission units. The input gear shaft is adapted to the planetary gear. The two first deep groove ball bearings are respectively sleeved on the outside of the input gear shaft and the output shaft and are located on the outer wall of the first inner housing. The two second end-face needle roller bearings are respectively disposed on the side of the corresponding deep groove ball bearings, and the two second end-face needle rollers are respectively adapted to the corresponding second grooves.

[0008] The second transmission unit further includes a second deep groove ball bearing and a third end face needle roller bearing. The first inner shell has a third groove. The second deep groove ball bearing is sleeved on the outside of the input gear shaft and is adapted to the first inner shell. The third end face needle roller bearing is disposed inside the third groove.

[0009] The reducer also includes a skeleton oil seal, which is disposed inside the integrated gear ring.

[0010] The first transmission units are respectively arranged around the input gear shaft, and the third end face needle roller bearing is adapted to the second deep groove ball bearing.

[0011] This utility model discloses a speed reducer in which, when the planetary gear rotates, two end-face needle roller bearings replace the first and second inner housings to contact the front and rear ends of the planetary gear, thereby reducing the contact area when the planetary gear rotates and thus reducing friction. Furthermore, the two end-face needle roller bearings are adapted to rotate within corresponding first grooves. Thus, by using the end-face needle roller bearings, the friction of the planetary gear is reduced, thereby lowering the operating temperature of the device and improving its service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a left view of the entire utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is a partial structural schematic diagram of the present invention.

[0017] 1-Integral gear ring, 2-Input flange, 3-Output shaft, 4-First inner housing, 5-Second inner housing, 6-Planet gear, 7-Pin shaft, 8-Needle roller, 9-First end face needle roller bearing, 10-First groove, 11-Input gear shaft, 12-Second end face needle roller bearing, 13-First deep groove ball bearing, 14-Second groove, 15-Second deep groove ball bearing, 16-Third end face needle roller bearing, 17-Third groove, 18-Skeleton oil seal. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a left view of the entire utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is a partial structural schematic diagram of the present invention.

[0020] This utility model provides a speed reducer, including an integrated gear ring 1, an input flange 2, an output shaft 3, a first inner shell 4, a second inner shell 5, multiple first transmission units and second transmission units. Each first transmission unit includes a planetary gear 6, a pin 7, multiple needle rollers 8, and two first end-face needle roller bearings 9. Both the first inner shell 4 and the second inner shell 5 have multiple first grooves 10. The output shaft 3 is fixedly connected to the outer wall of the first inner shell 4. The first inner shell 4 and the second inner shell 5 are adapted to each other. The multiple needle rollers 8 are respectively disposed inside the planetary gear 6. The pin 7 is inserted into the planetary gear 6, and the multiple needle rollers 8 are respectively sleeved on the outside of the pin 7. The two end-face needle roller bearings 8 are respectively disposed in the corresponding first grooves 10 and are in contact with the planetary gear 6. The input flange 2 is disposed on the outside of the second inner shell 5.

[0021] In this embodiment, when the planetary gear 6 rotates, two first end-face needle roller bearings 9 replace the first inner shell 4 and the second inner shell 5 to contact the front and rear ends of the planetary gear 6, thereby reducing the contact area when the planetary gear 6 rotates and thus reducing friction. Furthermore, the two end-face needle roller bearings 8 are adapted to rotate within the corresponding first grooves 10. Thus, by setting the first end-face needle roller bearings 9, the device reduces the friction of the planetary gear 6, thereby lowering the operating temperature of the device and improving its service life.

[0022] Furthermore, the second transmission unit includes an input gear shaft 11, two second end face needle roller bearings 12, and two first deep groove ball bearings 13. The outer wall of the second inner shell 5 and the integral gear ring 1 both have second grooves 14. The input gear shaft 11 passes through the second inner shell and is located between multiple first transmission units. The input gear shaft 11 is adapted to the planetary gear 6. The two first deep groove ball bearings 13 are respectively sleeved on the outside of the input gear shaft 11 and the output shaft 3 and are located on the outer wall of the first inner shell 4. The two second end face needle roller bearings 12 are respectively disposed on the side of the corresponding deep groove ball bearing. The two second end face needle rollers 8 are respectively adapted to the corresponding second grooves 14.

[0023] In this embodiment, the rotation of the input gear shaft 11 drives the planetary gear 6 to rotate, which in turn drives the output shaft 3 to rotate. Furthermore, the arrangement of two second end face needle roller bearings 12 reduces the friction of the input gear shaft 11 during rotation, thereby further reducing the temperature rise.

[0024] Furthermore, the second transmission unit also includes a second deep groove ball bearing 15 and a third end-face needle roller bearing 16. The first inner housing 4 has a third groove 17. The second deep groove ball bearing 15 is sleeved on the outside of the input gear shaft 11 and adapted to the first inner housing 4. The third end-face needle roller bearing 16 is disposed inside the third groove 17. The reducer also includes a skeleton oil seal 18, which is disposed inside the integral gear ring 1.

[0025] In this embodiment, the third end face needle roller bearing 16 further reduces the frictional contact area between the input gear shaft 11 and the first inner shell 4, thereby reducing friction and lowering temperature rise, and thus improving service life.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A speed reducer, characterized in that, It includes an integrated gear ring, an input flange, an output shaft, a first inner housing, a second inner housing, and multiple first and second transmission units; Each of the first transmission units includes a planetary gear, a pin, multiple needle rollers, and two first-face needle roller bearings. Both the first inner shell and the second inner shell have multiple first grooves. The output shaft is fixedly connected to the outer wall of the first inner shell. The first inner shell and the second inner shell are adapted to each other. The multiple needle rollers are respectively disposed inside the planetary gear. The pin is inserted into the planetary gear, and the multiple needle rollers are respectively sleeved on the outside of the pin. The two end-face needle roller bearings are respectively disposed in the corresponding first grooves and contact the planetary gear. The input flange is disposed on the outside of the second inner shell.

2. The speed reducer as described in claim 1, characterized in that, The second transmission unit includes an input gear shaft, two second end-face needle roller bearings, and two first deep groove ball bearings. The outer wall of the second inner housing and the integral gear ring both have second grooves. The input gear shaft passes through the second inner housing and is located between multiple first transmission units. The input gear shaft is adapted to the planetary gear. The two first deep groove ball bearings are respectively sleeved on the outside of the input gear shaft and the output shaft and are located on the outer wall of the first inner housing. The two second end-face needle roller bearings are respectively disposed on the side of the corresponding deep groove ball bearings, and the two second end-face needle rollers are respectively adapted to the corresponding second grooves.

3. The speed reducer as described in claim 2, characterized in that, The second transmission unit further includes a second deep groove ball bearing and a third end face needle roller bearing. The first inner housing has a third groove. The second deep groove ball bearing is sleeved on the outside of the input gear shaft and is adapted to the first inner housing. The third end face needle roller bearing is disposed inside the third groove.

4. The speed reducer as described in claim 3, characterized in that, The reducer also includes a skeleton oil seal, which is disposed inside the integral gear ring.

5. The speed reducer as described in claim 4, characterized in that, Multiple first transmission units are respectively arranged around the input gear shaft, and the third end face needle roller bearing is adapted to the second deep groove ball bearing.

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