CN218598739U - Retaining ring limiting mechanism for planetary transmission - Google Patents

Abstract

A circlip limiting mechanism for a planetary transmission, comprising a planet carrier, a ring gear and an elastic circlip, the planet carrier includes a mounting platform, the outer surface of the mounting platform is provided with a number of outer splines arranged at intervals, adjacent to the The outer spline has a first tooth groove, and the inner surface of the ring gear is protruded inwardly with several inner splines arranged at intervals, adjacent to the inner spline has a second tooth groove, and the outer spline is accommodated in In the second tooth groove, the internal spline is accommodated in the first tooth groove, at least one limiting groove is provided in the radial direction of the circlip, and a limiting member is protruded from the end surface of the installation platform , the limiting member is accommodated in the limiting groove, which can prevent the interruption and failure of transmission power transmission, reduce the shedding phenomenon of the elastic retaining ring, and ensure the service life of the transmission.

Description

A retaining ring limit mechanism for planetary transmission

technical field

The utility model relates to the technical field of transmissions, in particular to a retaining ring limiting mechanism for a planetary transmission.

Background technique

The transmission, also known as the gearbox, is a structure used to change the rotational speed and torque of the engine. The planetary transmission is an automatic transmission commonly used in the prior art. The planetary transmission includes a variety of braking methods, and one of them is an overdrive brake. In the dynamic mode, the planetary carrier is used as an input to transmit torque to the ring gear, which drives the ring gear and the planetary carrier to rotate together. Therefore, the transmission efficiency between the planetary carrier and the ring gear directly affects the normal use of the transmission. In the prior art, usually A retaining ring is added between the planetary carrier and the ring gear. The retaining ring will move in the circumferential direction due to the transmission of the planetary carrier and the ring gear. During the long-term use of the transmission, the retaining ring is easy to fall off, which affects the normal use of the transmission. .

Utility model content

In view of this, the purpose of the utility model is to provide a retaining ring limiting mechanism for a planetary transmission.

The utility model provides a retaining ring limit mechanism for a planetary transmission, which includes a planetary frame, a ring gear and an elastic retaining ring, the ring gear and the planetary frame are arranged coaxially, the planetary frame includes a mounting platform, and the gear The ring is arranged on the installation platform, the elastic retaining ring is arranged on the end surface of the installation platform, and is located between the installation platform and the ring gear in the radial direction, and the outer surface of the installation platform is provided with A plurality of outer splines arranged at intervals, adjacent to the outer splines have a first tooth groove, and the inner surface of the ring gear is protruded inwardly provided with a plurality of inner splines arranged at intervals, and adjacent to the inner splines have a first tooth groove. Two tooth grooves, the external splines are accommodated in the second tooth grooves, the internal splines are accommodated in the first tooth grooves, and the circlip is provided with at least one limiting groove in the radial direction, The end surface of the installation platform is protruded with a limiting member, and the limiting member is accommodated in the limiting groove.

In one embodiment, the size of the limiting groove in the circumferential direction is equal to or smaller than the size of the limiting member.

In one embodiment, the limiting groove is arranged on the outer side of the circlip, the limiting member is integrally formed with the external spline, and the limiting member is axially upward of the external spline A bulge is formed.

In one embodiment, the elastic circlip includes a notch, and the notch penetrates the elastic circlip in the radial direction, and the installation platform is provided with a positioning block that cooperates with the notch. When the ring is installed between the installation platform and the ring gear, the positioning block is accommodated in the notch.

In one embodiment, the end surface of the installation platform is protruded with a clamping block, and the clamping block abuts against the inner surface of the elastic retaining ring, and the clamping block is used to radially and Circumferential limit.

In one embodiment, the axial height of the block is greater than or equal to the thickness of the elastic circlip.

In one embodiment, the internal spline is provided with a retaining ring groove, and the retaining ring groove is set in cooperation with the thickness of the elastic retaining ring, and the elastic retaining ring is clamped in the retaining ring groove. That is, the circlip groove and the elastic circlip form an assembly fit relationship.

In one embodiment, the inner side of the elastic circlip is provided with an installation groove, the installation groove is used to clamp the installation part, the installation groove and the end of the installation part are profiled, and the elastic retaining ring is installed When the ring is in place, the end of the installation part is clamped in the installation groove to fix and limit the position of the elastic circlip.

In one embodiment, the installation platform is integrally formed with the planet carrier.

The beneficial effects of the utility model are:

Through the cooperation between the external spline and the internal spline, the torque can be transmitted between the planet carrier and the ring gear. By setting a limit groove on the elastic ring, the limit piece cooperates with the limit groove, and the elastic ring can Carry out radial and circumferential limit, and reduce the movement of the elastic retaining ring in the circumferential direction during the transmission process during the transmission of the planet carrier and the ring gear. When it is used for a long time, the movement of the elastic retaining ring in the circumferential direction will The instability of the elastic circlip leads to the risk of falling off; through the cooperation of the limit groove and the limit piece, the movement of the elastic circlip can be prevented, and the risk of the elastic circlip falling off can be avoided, thereby preventing the transmission from being interrupted, In case of failure occurs, the service life of the transmission is guaranteed.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the overall structure schematic diagram of an embodiment of the utility model;

Fig. 2 is a structural schematic diagram of a planetary carrier and a circlip according to an embodiment of the present invention;

Fig. 3 is a partially enlarged schematic diagram of the cooperation between the notch and the block in Fig. 1;

Fig. 4 is a partially enlarged schematic diagram of the cooperation of the limiting groove and the limiting member in Fig. 2;

Fig. 5 is a structural schematic diagram of a ring gear and a retaining ring according to an embodiment of the present invention;

FIG. 6 is a partially enlarged schematic view of the retaining ring groove in FIG. 5 .

1-planet carrier; 101-shaft hole; 102-external spline; 103-the first tooth groove; 104-positioning block; 105-block; 201-internal spline; 202-the second tooth groove; 203-circlip groove; 3-circlip; 301-notch; 302-limiting groove.

Detailed ways

Specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the description of the utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the utility model.

In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installation", "installation", "connection" and so on should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integratively connected; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in specific situations.

The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer" etc. is based on the attached The orientation or positional relationship shown in the figure, or the orientation or positional relationship that is usually placed when the utility model product is used, is only for the convenience of description and simplification of the description, not to indicate or imply that the referred device or element must have a specific Orientation, construction and operation in a particular orientation, therefore should not be construed as limiting the invention.

The terms "first", "second", "third", etc. are only used to distinguish elements of similar nature, and do not indicate or imply relative importance or a specific order.

The terms "comprising", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and also other elements not expressly listed.

As shown in accompanying drawing 1 and accompanying drawing 2, the circlip limiting mechanism for the planetary transmission proposed by the utility model includes a planetary carrier 1, a ring gear 2 and a circlip 3, the planetary carrier 1 includes a mounting platform, and the ring gear 2 is sleeved On the installation platform of the planet carrier 1, and set coaxially with the planet carrier 1, the circlip 3 is arranged on the end face of the installation platform, and is located between the installation platform and the ring gear 2, the planet carrier 1 includes a shaft hole 101, the shaft The hole 101 is used to pass through the power shaft. The outer surface of the installation platform is provided with a number of outer splines 102 arranged at intervals. A first tooth groove 103 is left between two adjacent outer splines 102. The inner surface of the ring gear 2 There are several internal splines 201 arranged at intervals protruding inward, and a second tooth groove 202 is left between two adjacent internal splines 201. When the ring gear 2 is sleeved on the installation platform, the external splines 102 are located In the second tooth groove 202, the inner spline 201 is located in the first tooth groove 103. Under a working condition of the planetary transmission, the planetary carrier 1 rotates along its own axis under the drive of the power shaft, and the outer spline 102 Cooperating with the second tooth groove 202 , the internal spline 201 and the first tooth groove 103 , the transmission torque drives the ring gear 2 to rotate.

In an example of this embodiment, the mounting platform is integrally formed with the planet carrier 1 .

With reference to accompanying drawings 1 and 3, the circlip 3 includes a notch 301, and the notch 301 penetrates the circlip 3 in the radial direction, so that the circlip 3 has two free ends, and the installation platform is provided with a positioning hole that cooperates with the notch 301. The stopper 104, when the circlip 3 is installed between the installation platform and the ring gear 2, the positioning stopper 104 is accommodated in the notch 301, which facilitates quick positioning and installation of the circlip 3 and improves installation efficiency.

As shown in Figure 3, the end face of the installation platform is protrudingly provided with a block 105, and the block 105 is arranged on the inner side of the circlip 3, that is, on the side of the circlip 3 radially away from the ring gear 2, and the block 105 105 is in contact with the inner surface of the circlip 3, and the circlip 3 can be limited in the radial direction and the circumferential direction by the clamping block 105, so as to prevent the circlip 3 from loosening during the transmission process of the planet carrier 1 and the ring gear 2 And cause fall off, ensure the normal use of elastic retaining ring 3.

Exemplarily, the height of the block 105 in the axial direction is greater than or equal to the height of the circlip 3 in the axial direction, that is, the height of the block 105 is greater than or equal to the thickness of the circlip 3 , so as to provide more support for the circlip 3 . Good stopper action.

In an example of this embodiment, there are two locking blocks 105, and the two locking blocks 105 are respectively arranged on both sides of the notch 301, abutting against the two free ends of the circlip 3 in the radial direction, and the locking blocks 105 Cooperating with the positioning block 104, the elastic circlip 3 can be prevented from moving radially and circumferentially.

In an example of this embodiment, as shown in FIG. 2 , the circlip 3 is provided with at least one limiting groove 302 in the radial direction, the limiting groove 302 runs through the circlip 3 in the axial direction, and the limiting groove 302 Set on the outside of the circlip 3, that is, the side of the circlip 3 close to the ring gear 2, the end surface of the installation platform is protruded with a stopper 106 that cooperates with the stopper groove 302, and the stopper 106 is accommodated in the stopper groove 302, the circlip 3 is limited in the radial direction and the circumferential direction. Exemplarily, the size of the limiting groove 302 in the circumferential direction is equal to or greater than the size of the limiting member 106. When installing, the limiting member 106 It is accommodated in the limiting groove 302, so that the installation of the elastic circlip 3 is stable. Exemplarily, as shown in FIG. 4 , the limiting member 106 is integrally formed with the external spline 102 , and the limiting member 106 is formed by the external spline 102 protruding upwards, which is convenient for forming. It can be understood that when the dimension of the limiting slot 302 in the circumferential direction is larger than that of the limiting member 106 , it should be within a reasonable range of assembly and design, rather than infinitely larger than the dimension of the limiting member 106 .

In another example of this embodiment, the limiting groove 302 is opened on the inner side of the circlip 3, that is, the side of the circlip 3 away from the ring gear 2, and the limiting member 106 is protruded on the end surface of the installation platform, and is located at On the inner surface of the circlip 3 , the limiting member 106 is accommodated in the limiting groove 302 to limit the circlip 3 .

In another example of this embodiment, the limiting slots 302 are opened on the inner side and the outer side of the elastic ring 3 respectively, so as to play a better role of limiting.

Through the cooperation of the limiting member 106 and the clamping block 105, the radial and circumferential positioning of the circlip 3 can be performed, and the clamping block 105 can prevent the elastic ring 3 from moving toward the side close to the shaft hole 101, and the position is limited. The member 106 prevents the circlip 3 from moving toward the side close to the ring gear 2 , so as to ensure the transmission effect between the planet carrier 1 and the ring gear 2 .

It should be noted that, in order to facilitate the understanding of the cooperation relationship between the notch 301 and the positioning stopper 104, the size of the notch 301 and its breaks are drawn in other shapes in the accompanying drawings 1 and 3, so as to facilitate the observation of the relationship between the various technical features. The relationship does not mean that the shape and size of the notch 301 are limited.

In an example of this embodiment, with reference to accompanying drawings 5 and 6, the inner side of the ring gear 2 is provided with a retaining ring groove 203, more specifically, the internal spline 201 is provided with a retaining ring groove 203, the retaining ring groove 203 is set in cooperation with the thickness of the circlip 3, the circlip 3 is clamped in the circlip groove 203, and the opening height of the circlip groove 203 is satisfied, when the circlip 3 is arranged in the circlip groove 203, the elastic The bottom surface of the retaining ring 3 can be placed on the end surface of the installation platform.

In an example of this embodiment, as shown in accompanying drawing 2, an installation groove 107 is also provided on the elastic retaining ring 3, and the installation groove 107 is set in cooperation with the mounting part, and the mounting part can be clamped in the mounting groove 107, and the mounting groove 107 is profiled with the end of the mounting part, and the mounting part can be a T-shaped block, a strip block, tweezers, etc. When installing the circlip 3, first place the circlip 3 on the end face of the installation platform, and then position The stopper 104 is accommodated in the notch 301, and the technician holds the installation part, clamps the end of the installation part in the installation groove 107, and exerts a radial force on the elastic circlip 3, so that the outer side of the elastic circlip 3 enters the retaining ring slot 203, and then dial the other positions of the elastic retaining ring 3 into the retaining ring groove 203 by hand, and the technician makes the stopper 106 clamp in the stopper groove 302 by breaking the stopper slot 302, and the installation part It can ensure that when the limit groove 302 is deformed, the circlip 3 remains stable as a whole, preventing the circlip 3 from moving and ensuring installation efficiency.

To sum up, through the cooperation between the external spline 102 and the internal spline 201, the torque can be transmitted between the planet carrier 1 and the ring gear 2, and by setting the limit groove 302 on the elastic ring 3, the limit member 106 cooperates with the limit groove 302, which can limit the radial and circumferential directions of the circlip 3, and reduce the movement of the circlip 3 in the circumferential direction during the transmission process of the planetary carrier 1 and the ring gear 2 phenomenon, when used for a long time, the movement of the circlip 3 in the circumferential direction will cause the instability of the circlip 3, and then there is a risk of falling off; Size, when the size of the limiting groove 302 is equal to the size of the limiting member 106, the limiting member 106 is directly accommodated in the limiting groove 302, when the size of the limiting groove 302 is smaller than the size of the limiting member 106, the elastic stop The elastic action of the ring 3 causes the limit groove 302 to deform, and the limit member 106 is clamped in the limit groove 302. Through the cooperation of the limit groove 302 and the limit member 106, the elastic retaining ring 3 can be prevented from moving. The risk of falling off of the circlip 3 is avoided, thereby preventing interruption and failure of transmission power transmission and ensuring the service life of the transmission.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any skilled person familiar with the technical field can easily think of changes within the technical scope disclosed by the utility model Or replacement, all should be covered within the scope of protection of the present utility model. Therefore, the protection scope of the present utility model should be based on the appended claims.

Claims (9)

1. The utility model provides a retaining ring stop gear for planetary transmission which characterized in that: including planet carrier (1), ring gear (2) and circlip (3), ring gear (2) with planet carrier (1) coaxial arrangement, planet carrier (1) includes mounting platform, ring gear (2) cover is established on the mounting platform, circlip (3) set up on mounting platform's the terminal surface, and radially lie in mounting platform with between ring gear (2), mounting platform's surface is equipped with external splines (102) that a plurality of intervals set up, and is adjacent external splines (102) have first tooth's socket (103), the internal surface of ring gear (2) is inwards protruding to be equipped with internal splines (201) that a plurality of intervals set up, and is adjacent internal splines (201) have second tooth's socket (202), external splines (102) hold in second tooth's socket (202), internal splines (201) hold in first tooth's socket (103), circlip (3) radially be provided with at least one spacing groove (302), mounting platform's terminal surface is protruding to be equipped with locating part (106), locating part (106) hold in spacing groove (302).

2. The retainer ring stopper mechanism for a planetary transmission according to claim 1, characterized in that: the dimension of the limiting groove (302) in the circumferential direction is equal to or larger than the dimension of the limiting piece (106).

3. The retainer ring stopper mechanism for a planetary transmission according to claim 1, characterized in that: the limiting groove (302) is formed in the outer side of the elastic retainer ring (3), the limiting piece (106) and the external spline (102) are integrally formed, and the limiting piece (106) is formed by protruding upwards in the axial direction of the external spline (102).

4. The retainer ring stopper mechanism for a planetary transmission according to claim 1, characterized in that: the elastic retainer ring (3) comprises a notch (301), the notch (301) penetrates through the elastic retainer ring (3) along the radial direction, a positioning stop block (104) matched with the notch (301) is arranged on the end face of the mounting platform, and when the elastic retainer ring (3) is mounted between the mounting platform and the gear ring (2), the positioning stop block (104) is accommodated in the notch (301).

5. The retainer ring stopper mechanism for a planetary transmission according to claim 1 or 4, characterized in that: the end face of the mounting platform is convexly provided with a clamping block (105), the clamping block (105) is abutted to the inner side surface of the elastic check ring (3), and the clamping block (105) is used for limiting the elastic check ring (3) in the radial direction and the circumferential direction.

6. The retainer ring stopper mechanism for a planetary transmission according to claim 5, characterized in that: the height of the clamping block (105) in the axial direction is larger than or equal to the thickness of the elastic retainer ring (3).

7. The retainer ring limit mechanism for a planetary transmission according to claim 1, characterized in that: and a retainer ring groove (203) is formed in the inner spline (201), the retainer ring groove (203) is matched with the thickness of the elastic retainer ring (3), and the elastic retainer ring (3) is clamped in the retainer ring groove (203).

8. The retainer ring stopper mechanism for a planetary transmission according to claim 1, characterized in that: the inboard of circlip (3) is equipped with mounting groove (107), mounting groove (107) are used for the card to establish the installed part, mounting groove (107) with the tip profile modeling of installed part, at the installation during circlip (3), the tip card of installed part is established in mounting groove (107), right circlip (3) are fixed spacingly.

9. The retainer ring stopper mechanism for a planetary transmission according to claim 1, characterized in that: the mounting platform and the planet carrier (1) are integrally formed.

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