CN210265739U

CN210265739U - RV speed reducer

Info

Publication number: CN210265739U
Application number: CN201921020619.3U
Authority: CN
Inventors: 孟祥杰; 朱宝涛
Original assignee: Langfang Qin Zong Transmission Technology Co ltd
Current assignee: Langfang Qin Zong Transmission Technology Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-07
Anticipated expiration: 2029-07-02

Abstract

The utility model provides a RV speed reducer relates to reduction gear technical field, and the casing of having solved the RV speed reducer is relatively heavier, sun gear and planet wheel between both meshing teeth complex clearance be difficult to the technical problem who adjusts. The device comprises a sun wheel and planet wheels meshed with the sun wheel, wherein the planet wheels are distributed around the sun wheel along the circumferential direction of the sun wheel, and when the sun wheel is adjusted along the axial direction of the sun wheel, the fit clearance between meshing teeth of the sun wheel and the planet wheels can be changed; the RV reducer also comprises a pin gear shell, and the pin gear shell is made of an aluminum alloy material. The utility model is used for a weight is light, better, the clearance adjustable RV speed reducer of thermal diffusivity.

Description

RV speed reducer

Technical Field

The utility model belongs to the technical field of the reduction gear technique and specifically relates to a RV speed reducer is related to.

Background

The RV reducer consists of a front stage of a planet gear reducer and a rear stage of a cycloidal pin gear reducer, has compact structure, large transmission ratio and transmission machinery with a self-locking function under a certain condition, is one of the most common reducers, and has small vibration, low noise and low energy consumption.

The working principle of the RV reducer is as follows: the driving sun gear is a straight gear and is connected with the input shaft, if the sun gear rotates clockwise, the driving sun gear drives three planetary gears which are arranged in 120 degrees to rotate anticlockwise, a crank shaft connected with the planetary gears rotates at the same speed, two cycloidal gears with phase difference of 180 degrees are hinged on the three crank shafts and are meshed with the fixed needle wheel, and the driving sun gear also rotates in the opposite direction, namely rotates clockwise, while revolving around the axis of the needle wheel; an output mechanism (namely a planet carrier) is inserted into the cycloidal gear and connected with the cycloidal gear, and the rotation vector on the cycloidal gear is transmitted out at the speed ratio of 1: 1.

The applicant has found that the prior art has at least the following technical problems:

(1) the housing of the existing RV reducer is relatively heavy;

(2) the sun gear and the planet gear are straight gears, and the meshing teeth of the sun gear and the planet gear are matched

Is difficult to adjust.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an RV speed reducer, just the utility model provides a many technological effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a RV speed reducer, including sun gear and the planet wheel with the sun gear engaged with, wherein, the planet wheel distributes around the sun gear along the circumference direction of sun gear, when adjusting the sun gear along the axis direction of sun gear, can change the clearance that cooperates between the meshing teeth of sun gear and planet wheel; the RV speed reducer still includes the pin gear shell, the pin gear shell adopts the aluminum alloy material to make.

Preferably, the tooth thickness of the sun gear is gradually increased or gradually decreased along the tooth width direction of the sun gear.

Preferably, the cross-sectional shape of the sun gear is the same as that of the involute cylindrical gear; the sun wheel comprises a sun column portion and sun tooth portions, the sun column portion is cylindrical, and the sun tooth portions are evenly distributed on the side wall of the sun column portion along the circumferential direction of the sun column portion.

Preferably, the tooth thickness of the planet wheel gradually increases or gradually decreases along the tooth width direction of the planet wheel, and the tooth thickness increasing direction of the planet wheel is consistent with the tooth thickness increasing direction of the sun wheel.

Preferably, the cross section of the planet gear is the same as that of the involute cylindrical gear; the planet wheel includes planet cylindricality portion and planet tooth portion, planet cylindricality portion is cylindricly, planet tooth portion is followed the circumference direction evenly distributed of planet cylindricality portion is in the lateral wall of planet cylindricality portion.

Preferably, the width of the sun gear is greater than the width of the planet gears.

Preferably, the RV reducer further comprises an input shaft, and the input shaft and the sun gear are of an integrally formed structure.

Preferably, the RV speed reducer further comprises a crankshaft, the planet wheel is connected with the corresponding crankshaft, and the planet wheel and the crankshaft are of a split structure.

Preferably, be provided with the meshing internal tooth on the planet wheel, be provided with the meshing external tooth on the circumference side of bent axle, the meshing internal tooth with the meshing external tooth cooperatees in order to realize the planet wheel with correspond the bent axle is connected.

Preferably, the inside wall of the pin gear shell is provided with a pin gear accommodating groove, and the pin gear accommodating groove is distributed on the pin gear shell along the circumferential direction of the pin gear shell.

The utility model provides an RV speed reducer, when adjusting the sun gear along the axis direction of the sun gear, the clearance between the meshing teeth of the sun gear and the planet gear can be changed, and then the adjustment of the clearance between the meshing teeth of the sun gear and the planet gear can be realized; the needle gear shell of the RV reducer is made of aluminum alloy materials, and the aluminum alloy has the advantages of light weight, good heat dissipation, good ductility, corrosion resistance and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an RV reducer provided in an embodiment of the present invention;

fig. 2 is a schematic front view of an RV reducer provided by an embodiment of the present invention;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

fig. 4 is a schematic structural diagram of a pin gear housing according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a sun gear and an input shaft provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a planet wheel provided by the embodiment of the present invention.

FIG. 1-sun gear; 2-a planet wheel; 21-meshing internal teeth; 3-a needle gear shell; 4-an input shaft; 5-a crankshaft; 6-an output shaft; 7-balance wheel; 8-support flange.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, the utility model provides a RV speed reducer, including sun gear 1 and planet wheel 2 with sun gear 1 looks meshing, wherein, planet wheel 2 distributes around sun gear 1 along the circumferential direction of sun gear 1, when adjusting sun gear 1 along the axis direction of sun gear 1, can change the clearance of complex between sun gear 1 and planet wheel 2 both meshing teeth, the clearance of sun gear 1 and planet wheel meshing teeth is not big, but can have certain influence to transmission precision, return difference, through reducing the fit clearance as far as possible, mention the transmission precision; referring to fig. 1 and 4, the RV reducer further includes a pin gear housing 3, and the pin gear housing 3 is made of an aluminum alloy material, so that the aluminum alloy has the advantages of light weight, good heat dissipation, good ductility, corrosion resistance and the like.

As the embodiment of the present invention can be optionally implemented, the tooth thickness of the sun gear 1 is gradually increased or gradually decreased along the tooth width direction of the sun gear 1. The structure of the sun gear 1 may be embodied as follows: the cross section of the sun gear 1 is the same as that of the involute cylindrical gear; the sun gear 1 comprises a sun column portion and a sun tooth portion, the sun column portion is cylindrical, the sun tooth portion is uniformly distributed on the side wall of the sun column portion along the circumferential direction of the sun column portion, see fig. 5, when the sun gear is close to the input shaft 4, the tooth thickness of the sun gear 1 is gradually increased along the tooth width direction of the sun gear 1, at the moment, the planet gear 2 can be an involute cylindrical gear, see fig. 3, when the sun gear 1 moves to the right side to be slightly adjusted, the fit clearance between the planet gear 2 and the mesh teeth of the sun gear 1 can be reduced, and further, the fit clearance between the mesh teeth of the sun gear 1 and the planet gear 2 is adjustable. The tooth width direction of the sun gear 1 is parallel to the axial direction of the input shaft 4, and referring to fig. 5, the tooth width b is schematically shown; the tooth thickness of the sun gear 1 can be the length of an arc line between tooth profiles on two sides of the teeth on the pitch circle of the sun gear 1.

Note that, although the tooth thickness of the sun gear 1 gradually increases or decreases in the direction of the tooth width of the sun gear 1, the numerical range in which the tooth thickness changes is relatively small.

As the embodiment of the utility model provides an optional embodiment, the tooth thickness of planet wheel 2 can be gradually increased or reduce along the direction of 2 tooth widths of planet wheel, and the tooth thickness increasing direction of planet wheel 2 is unanimous with the 1 tooth thickness increasing direction of sun gear. Referring to fig. 6, the structure of the planet 2 may be as follows: the cross section of the planet wheel 2 is the same as that of the involute cylindrical gear; the planet gear 2 includes a planet cylindrical portion and a planet tooth portion, the planet cylindrical portion is cylindrical, and the planet tooth portion is evenly distributed on the side wall of the planet cylindrical portion along the circumferential direction of the planet cylindrical portion. When the planet gear is close to the input shaft 4, the tooth thickness of the sun gear 1 is gradually increased along the tooth width direction of the sun gear 1, and the tooth thickness increasing direction of the planet gear 2 is consistent with the tooth thickness increasing direction of the sun gear 1; referring to fig. 3, when the sun gear 1 moves to the right for fine adjustment, the fit clearance between the meshing teeth of the planet gears 2 and the sun gear 1 can be reduced, and further, the fit clearance between the meshing teeth of the sun gear 1 and the planet gears 2 can be adjusted. The tooth width direction of planet wheel 2 is parallel with its axis direction, and the tooth thickness of planet wheel 2 can be for the pitch circle pitch arc length between the tooth profile of the teeth of a cogwheel both sides on planet wheel 2 graduated circle.

As the embodiment of the utility model provides an optional implementation mode, the tooth width of sun gear 1 is greater than the tooth width of planet wheel 2. When the position of the sun wheel 1 is adjusted along the axis direction of the extending shaft 4, the sun wheel 1 can be always meshed with the planet wheel 2.

As the embodiment of the utility model provides an optional implementation mode, the RV speed reducer still includes input shaft 4, and input shaft 4 and sun gear 1 are the integrated into one piece structure. The assembly is convenient, and the transmission precision is improved.

As the embodiment of the utility model provides an optional embodiment, the RV speed reducer still includes bent axle 5, and planet wheel 2 is connected with corresponding bent axle 5, and planet wheel 2 is split type structure with bent axle 5. The connection of the planet wheels 2 to the crankshaft 5 can be as follows: be provided with meshing internal tooth 21 on the planet wheel 2, be provided with the meshing external tooth on the circumference side of bent axle 5, meshing internal tooth 21 cooperatees with the meshing external tooth in order to realize that planet wheel 2 is connected with corresponding bent axle 5.

As the embodiment of the utility model provides an optional implementation mode, see fig. 4, be provided with the pin teeth holding tank on the inside wall of pin teeth shell 3, the pin teeth holding tank distributes on pin teeth shell 3 along 3 circumference directions of pin teeth shell.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An RV reducer is characterized by comprising a sun gear (1) and planet gears (2) meshed with the sun gear (1), wherein,

the planet gears (2) are distributed around the sun gear (1) along the circumferential direction of the sun gear (1), and when the sun gear (1) is adjusted along the axial direction of the sun gear (1), the fit clearance between meshing teeth of the sun gear (1) and the planet gears (2) can be changed;

the RV speed reducer still includes pin gear shell (3), pin gear shell (3) adopt the aluminum alloy material to make.

2. The RV reducer according to claim 1, characterized in that the tooth thickness of the sun gear (1) is gradually increased or decreased along the direction of the tooth width of the sun gear (1).

3. The RV reducer according to claim 2, characterized in that said sun gear (1) has a cross-sectional shape identical to that of an involute cylindrical gear; the sun gear (1) comprises a sun column portion and sun tooth portions, the sun column portion is cylindrical, and the sun tooth portions are evenly distributed on the side wall of the sun column portion along the circumferential direction of the sun column portion.

4. The RV reducer according to claim 2 or 3, characterized in that the tooth thickness of the planet wheel (2) is gradually increased or decreased along the tooth width direction of the planet wheel (2), and the tooth thickness increasing direction of the planet wheel (2) is consistent with the tooth thickness increasing direction of the sun wheel (1).

5. The RV reducer according to claim 4, characterized in that the cross-sectional shape of said planet wheel (2) is the same as that of an involute cylindrical gear; the planet wheel (2) comprises a planet cylindrical part and a planet tooth part, the planet cylindrical part is cylindrical, and the planet tooth part is uniformly distributed on the side wall of the planet cylindrical part along the circumferential direction of the planet cylindrical part.

6. The RV reducer according to claim 1, characterized in that the tooth width of said sun (1) is greater than the tooth width of said planet (2).

7. The RV reducer of claim 1 or 6 further comprising an input shaft (4), said input shaft (4) being of unitary construction with said sun gear (1).

8. The RV reducer according to claim 1, further comprising a crankshaft (5), wherein the planetary gear (2) is connected with the corresponding crankshaft (5), and the planetary gear (2) and the crankshaft (5) are of a split structure.

9. The RV reducer according to claim 8, characterized in that the planet wheels (2) are provided with inner meshing teeth (21), the crankshaft (5) is provided with outer meshing teeth on the circumferential side, and the inner meshing teeth (21) and the outer meshing teeth cooperate to realize the connection of the planet wheels (2) and the corresponding crankshaft (5).

10. The RV reducer according to claim 1, characterized in that needle tooth accommodating grooves (31) are arranged on the inner side wall of the needle tooth housing (3), and the needle tooth accommodating grooves (31) are distributed on the needle tooth housing (3) along the circumferential direction of the needle tooth housing (3).