RV speed reducer

Abstract

The utility model provides an RV speed reducer which comprises a cam shaft assembly, a planet carrier cover, a planet carrier seat, a planet gear and an input shaft and further comprises a shell and a gear. Outward mounting holes are formed in the outer circumference of the shell at intervals, gear teeth are arranged on the inner circumference of the shell, and the gear is arranged in the shell; the two ends of the cam shaft assembly are rotationally connected with the planet carrier cover and the planet carrier base correspondingly, and the planet carrier cover and the planet carrier base are rotationally matched at the two ends of the shell. The input shaft drives the gear to do eccentric motion in the shell through the planetary gear and the cam shaft assembly, so that the gear rotates while revolving, and a plurality of gear teeth of the gear are meshed with a plurality of gear teeth on the inner circumference of the shell. According to the RV speed reducer, the inner meshing gear teeth on the inner circumference of the shell are matched with the outer gear teeth, the requirement for high assembling precision of a traditional pin wheel shell and a gear is lowered, meanwhile, it is guaranteed that the running precision of the speed reducer is not reduced, and the transmission efficiency and the allowable output rotating speed are higher.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the technical field of speed reducer, specifically relates to a RV speed reducer. BACKGROUND

[0002] The current RV speed reducer is of cycloidal pin wheel - planetary transmission form, the tooth shape of the cycloidal pin wheel is the highest precision part in RV reducer, and its machining cost is also the highest, the highest cost is that the size precision is the highest (at nanometer level), and the other is the modification cost of the cycloidal pin wheel gear, a plurality of grinding points are selected on the tooth shape of the cycloidal pin wheel to grind and obtain ideal tooth shape.This process will consume a lot of time and money cost, but in order to ensure that the stress distribution of the contact area is uniform and reasonable during the operation of the RV reducer, it is also essential.

[0003] In addition to the high machining cost, the RV reducer is a precision reducer, and its assembly cost is also very high. The core parts including the cycloidal pin wheel in each RV reducer need to be selected and matched to ensure that the assembly size ring is reasonable, and it is also an important guarantee for product performance. The skilled workers need to operate the selection and matching, and the cycloidal pin wheel, the needle roller and the needle tooth shell need to be selected and matched at the same time to ensure the running accuracy of the reducer. UTILITY MODEL CONTENTS

[0004] In view of the defects and deficiencies of the present technology, the utility model embodiment proposes a RV speed reducer for reducing assembly precision. The technical scheme is as follows:

[0005] The utility model proposes a RV speed reducer, which comprises a camshaft assembly, a planet carrier cover, a planet carrier seat, a planet gear and an input shaft, and further comprises a shell and a gear;

[0006] The shell is provided with a mounting hole outside the circumference, and the shell is provided with gear teeth inside the circumference, and the gear is arranged in the shell;

[0007] The camshaft assembly is rotatably connected to the planet carrier cover and the planet carrier seat at both ends, and the planet carrier cover and the planet carrier seat are rotatably connected to the shell at both ends;

[0008] The input shaft drives the gear to make eccentric motion in the shell through the planet gear and the camshaft assembly, so that the gear rotates while revolving, and the gear teeth of the gear are engaged with the gear teeth of the shell.

[0009] As a preferred embodiment of the above technical scheme, the inner gear teeth of the shell are two teeth different from the outer gear teeth.

[0010] As a preferred embodiment of the above technical scheme, the shell is integrally forged.

[0011] As the preferred technical scheme, the planet carrier cover and the planet carrier seat are connected with the shell through angular contact bearings and skeleton oil seals at both ends.

[0012] As the preferred technical scheme, the planet carrier cover and the planet carrier seat are connected through a connecting piece, which sequentially passes through the planet carrier cover, the gear and the planet carrier seat.

[0013] The utility model provides a RV speed reducer, the cooperation form of the internal meshing gear tooth of shell inner circumference and the external gear tooth has reduced the requirement that traditional needle tooth shell and gear assembly precision are higher, guarantees the running precision of speed reducer not to reduce simultaneously, and transmission efficiency and allowable output speed are higher. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment description, obviously, the drawing in the following description only is some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0015] Figure 1 It is the RV speed reducer explosion map provided by the embodiment of the utility model;

[0016] Figure 2 It is the shell structure schematic view provided by the embodiment of the utility model;

[0017] Figure 3 It is the gear 2-1 and the gear tooth meshing state schematic view in the shell provided by the embodiment of the utility model;

[0018] Figure 4 It is the gear 2-2 and the gear tooth meshing state schematic view in the shell provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be further detailedly described to the embodiment of the utility model with the drawings.

[0020] The utility model provides a RV speed reducer, the RV speed reducer includes camshaft assembly 1, gear 2, planet carrier cover 3, planet carrier seat 4, planetary gear 5 and input shaft (input shaft is not shown in the drawing), still includes shell 7, the shell adopts integrated forging;

[0021] The shell 7 outer circumference interval is provided with the external mounting hole 7-1, and the gear 2 is arranged in the shell 7.

[0022] The planet carrier cover 3 and the planet carrier base 4 are rotationally connected with the shell 7 at both ends, the camshaft assembly 1 is rotationally connected with the planet carrier cover 3 and the planet carrier base 4 at both ends through bearings, and the camshaft assembly 1 is connected with the gear 2;

[0023] The input shaft drives the gear 2 to make eccentric motion in the shell 7 through the planetary gear 5 and the camshaft assembly 2, so that the gear rotates around the sun while rotating around its own axis, the gear 2 is meshed with a plurality of gear teeth on the inner circumference of the shell 7, and the gear includes a gear 2-1 and a gear 2-2.

[0024] The gear teeth 7-2 of the shell 7 and the gear teeth of the gear are two teeth different.

[0025] The planet carrier cover 3 and the planet carrier base 4 are connected with the shell at both ends through angular contact bearings 6 and skeleton oil seals, respectively.

[0026] The planet carrier base and the planetary gear are connected through a connecting piece 8, the connecting piece sequentially passes through the planet carrier cover, the gear and is connected with the planet carrier base, and the connecting piece can be a connecting bolt, a connecting arm or the like.

[0027] The utility model provides a kind of RV speed reducer, the cooperation form of inner meshing gear teeth of inner circumference of shell and external gear teeth, reduce the requirement that traditional needle tooth shell and gear assembly precision is higher, while guaranteeing that the running accuracy of speed reducer is not reduced, and transmission efficiency and allowable output speed are higher.

[0028] The technical scheme of the utility model is described, but not limited thereto; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical scheme recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. An RV reduction unit comprising a camshaft assembly, a planetary carrier cover, a planetary carrier seat, planetary gears and an input shaft, characterized in that, Also include the shell and gear; The shell outer circumference is provided with mounting hole outward, the shell inner circumference has gear teeth, the gear is arranged in the shell; The camshaft assembly is rotatably connected with the planet carrier cover and the planet carrier seat at both ends, and the planet carrier cover and the planet carrier seat are rotatably matched at both ends of the shell; The input shaft drives the gear to make eccentric motion in the shell through the planetary gear and the camshaft assembly, so that the gear rotates while revolving, and the gear teeth of the gear are engaged with the gear teeth of the shell inner circumference.

2. The RV reduction machine of claim 1, wherein, The gear teeth of the shell inner circumference and the gear teeth of the gear are two teeth difference.

3. The RV reduction machine of claim 1, wherein, The shell is integrally forged.

4. The RV reduction machine of claim 1, wherein, The planet carrier cover and the planet carrier seat are connected with the shell through angular contact bearings and skeleton oil seals respectively.

5. The RV reduction machine of claim 1, wherein, The planet carrier cover and the planet carrier seat are connected through the connecting piece, and the connecting piece passes through the planet carrier cover, the gear and the planet carrier seat in sequence and is connected with the planet carrier seat.

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