CN221401519U

CN221401519U - Duplex sun gear for RV reducer

Info

Publication number: CN221401519U
Application number: CN202420108399.4U
Authority: CN
Inventors: 陈华平; 文军军; 王龙; 王辛楠; 薛萌
Original assignee: Qinchuan Machine Tool Group Co ltd; Shaanxi Qinchuan High Precision Transmission Technology Co ltd
Current assignee: Qinchuan Machine Tool Group Co ltd; Shaanxi Qinchuan High Precision Transmission Technology Co ltd
Priority date: 2024-01-17
Filing date: 2024-01-17
Publication date: 2024-07-23
Anticipated expiration: 2034-01-17

Abstract

The utility model discloses a duplex central gear for an RV reducer, which is arranged outside a needle gear shell of the RV reducer, and is meshed with an input gear and a planet gear. The utility model can effectively improve the usability of the center middle of the speed reducer, has low noise and high transmission precision, is applicable to wide types of RV speed reducers, and improves the practical efficiency and applicability of the RV speed reducers.

Description

Duplex sun gear for RV reducer

Technical Field

The utility model belongs to the technical field of speed reducers, and relates to a duplex sun gear for an RV speed reducer.

Background

In recent years, with the continuous development of robots and automation industries, the robot industry in China has a huge development space and potential, and the supply and the shortage of the robot joint reducer are accompanied with the development of the robot joint reducer. The RV reducer is used as a main force army of the robot joint reducer, and directly influences the working operation quality and precision of the robot. The RV reducer consists of a front stage of a planetary gear reducer and a rear stage of a cycloidal pin gear reducer, and is a two-stage transmission mechanism. The RV reducer has the advantages of compact structure, large transmission ratio, small vibration, low noise, low energy consumption and the like.

Disclosure of utility model

The utility model aims to provide a duplex sun gear for an RV reducer, which improves the practical efficiency and applicability of the RV reducer.

The technical scheme adopted by the utility model is that the duplex central gear for the RV reducer is arranged outside a pin gear shell of the RV reducer, an input gear and a planet gear are meshed, the duplex central gear comprises a large gear and a small gear which are coaxially arranged, the large gear and the small gear synchronously rotate, the large gear is meshed with the input gear, and the small gear is meshed with the planet gear.

The present utility model is also characterized in that,

The gear wheel and the pinion are arranged up and down, through holes are formed in the center positions of the gear wheel and the pinion, a central shaft is arranged in the through holes, and the central shaft is in interference fit with the through holes.

The large gear and the small gear are fixedly connected through a fixed pin.

The input gear is arranged at the shaft end of the input shaft of the speed reducer, and the input shaft is eccentrically arranged in the speed reducer.

The pinion is a gear for gear grinding.

The beneficial effects of the utility model are as follows:

The duplex central gear for the RV reducer is characterized in that the duplex gear (a large gear and a small gear) is a hollow hole shaft part, so that the input shaft is eccentrically arranged and is far away from the reducer compared with other types, most of central space of the reducer is liberated, cables and the like can be inserted into the reducer, the space-saving design of the device is realized, and the usability in the middle of the center of the reducer can be effectively improved; the pinion is a gear grinding machining gear, the precision can reach 5 levels, meanwhile, the pinion can be subjected to tooth direction shape correction, the noise of the pinion is effectively reduced, and the transmission precision is improved; the applicable RV reducer is wide in type, and the practical efficiency and applicability of the RV reducer are improved.

Drawings

FIG. 1 is a schematic view of the installation of a duplex sun gear for an RV reducer of the present utility model;

fig. 2 is a schematic structural view of a duplex sun gear for an RV retarder of the present utility model.

In the figure, 1, a needle gear shell, 2, a planet gear, 3, an input gear, 4, a fixed pin, 5, a large gear and 6, a small gear.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description.

Example 1

The embodiment provides a duplex sun gear for an RV reducer, as shown in fig. 1, which is arranged outside a pin gear housing 1 of the RV reducer and is meshed with an input gear 3 and a planet gear 2, as shown in fig. 2, and comprises a large gear 5 and a small gear 6 which are coaxially arranged, wherein the large gear 5 and the small gear 6 synchronously rotate, the large gear 5 is meshed with the input gear 3, the input gear 3 transmits torque to rotate, and the small gear 6 is meshed with three planet gears 2 to complete transmission from an input shaft to the reducer.

Example 2

The embodiment provides a duplex sun gear for RV reduction gear, on the basis of embodiment 1, gear wheel 5 and pinion 6 set up from top to bottom, and gear wheel 5 and pinion 6 are hollow hole axle part, and the through-hole has all been seted up to gear wheel 5 and pinion 6 central point put, is provided with the center pin in the through-hole, and the center pin is interference fit with the through-hole, and gear wheel 5 and pinion 6 pass through fixed pin 4 to be connected fixedly, make pinion 6 and gear wheel 5 be in fixed constraint, and gear wheel 5 and pinion 6 coaxial concentric with rotates, and gear wheel 5 and pinion 6 do not have relative rotation trend.

The pinion 6 is a gear grinding machining gear, the precision can reach 5 levels, and meanwhile, the pinion can be subjected to tooth direction shape correction, so that noise in the rotation process is reduced, and the transmission precision is improved.

Example 3

The embodiment provides a duplex sun gear for RV reduction gear, on the basis of embodiment 1 and embodiment 2, input gear 3 sets up the axle head at the reduction gear input shaft, and the input shaft sets up eccentrically in the reduction gear, satisfies the structural requirement of input gear 3 eccentric installation, has liberated most reduction gear central space, can supply to realize inserting cable etc. in the reduction gear inside, has realized the design of device saving space.

According to the utility model, the RV reducer is provided with the duplex central gear, the input gear 3 is a driving piece, the input rotating speed and torque are input, the input gear 3 is meshed with the large gear 5, and the large gear 5 is in interference fit with the small gear 6 through a hole shaft and is fixed through the fixed pin 4, so that concentric transmission is realized. And the pinion 6 is matched with the RV planet wheel 2, the planet wheel 2 is fixed on a planet shaft, the input gear 3 drives the large gear 5 to rotate, the large gear 5 and the pinion 6 coaxially rotate, and the pinion 6 drives the planet wheel 2 to rotate.

From the above, unlike the RV-E classical architecture in which the central axle of the existing RV reducer is coaxial with the output shaft, in the RV-E reducer, the central axle is generally an input gear and directly performs planetary gear train meshing transmission with the planetary gear. The RV-C reducer using the duplex central gear is different, and the power output shaft of the driving motor is connected with the offset input gear 3 and then meshed with the large gear 5 in the duplex gear, the small gear 6 and the large gear 5 are in coaxial relation, no relative displacement exists between the small gear 6 and the large gear 5, and the small gear 6 is meshed with the planet gear of the RV-C reducer, so that the transmission between the motor and the reducer is realized, and the practical efficiency and applicability of the RV reducer are improved.

Claims

The duplex sun gear for the RV reducer is arranged outside a needle gear shell (1) of the RV reducer, and is meshed with an input gear (3) and a planet gear (2), and is characterized by comprising a large gear (5) and a small gear (6) which are coaxially arranged, wherein the large gear (5) and the small gear (6) synchronously rotate, the large gear is meshed with the input gear (3), and the small gear (6) is meshed with the planet gear (2).
2. The duplex sun gear for the RV reducer according to claim 1, wherein the large gear (5) and the small gear (6) are arranged up and down, through holes are formed in the central positions of the large gear (5) and the small gear (6), a central shaft is arranged in the through holes, and the central shaft is in interference fit with the through holes.
3. The duplex sun gear for RV reducers according to claim 1, wherein the large gear (5) and the small gear (6) are connected and fixed by a fixing pin (4).
4. The duplex sun gear for an RV retarder according to claim 1, wherein the input gear (3) is arranged at the shaft end of the retarder input shaft, which is arranged eccentrically in the retarder.
5. The duplex sun gear for an RV reducer according to claim 1 wherein the pinion (6) is a gear-grinding machining gear.