Structure for reducing axial abrasion of planet row

Abstract

The utility model relates to a combined structure of a planet row, in particular to a structure for reducing axial abrasion of the planet row, and aims to solve the problems that a first rotating part and a second rotating part in a planet row of an existing transmission system are prone to abrasion, so that the service life of the planet row is shortened, and an existing anti-abrasion method is complex in step. The device comprises a first rotating piece, a second rotating piece, a spring, a first gasket, a thrust bearing and a second gasket, a first mounting hole is formed in the end part of the first rotating piece, and a second mounting hole is formed in the end part of the second rotating piece; the first gasket comprises a first barrel and a first circular ring arranged at one end of the first barrel, and the first gasket and the first rotating piece keep the same rotating speed; the second gasket and the second rotating piece keep the same rotating speed; the spring, the first gasket and the thrust bearing are sequentially arranged from the bottom surface to the end surface of the first mounting hole; a gap exists between the end face of the first rotating piece and the end face of the second rotating piece.

Description

Technical Field

[0001] The utility model relates to a combined structure of a planetary gear set, specifically to a structure for reducing axial wear of the planetary gear set. Background Art

[0002] The planetary gear set is a core component of the transmission system, and is mostly used for the confluence of power flow, and is frequently used in vehicle transmissions. In recent years, abnormal wear of the planetary gear set in the transmission equipped with the planetary gear set is a frequent problem during use. The wear is mainly axial wear between the planet gear and the planet carrier, and axial wear between the sun gears of multiple planetary gear sets or between the sun gear and the planet carrier.

[0003] There are two main reasons for the above problems:

[0004] 1. When using a multi-stage planetary gear set, in order to prevent overconstraint of components and ensure uniform force on the sun gear, the sun gear in the planetary gear set mostly adopts a floating structure, that is, one end is connected by a spline and the other end is not fixed. Therefore, the axial movement amount of the sun gear is relatively large and exceeds the predetermined size, resulting in contact wear between the sun gear and the planet carrier.

[0005] 2. The planet gear is generally axially fixed to the planet carrier through a gasket and a snap ring, and is radially fixed through a needle roller bearing. Most of the planet gears are straight teeth, and there is theoretically no axial force. However, due to machining accuracy reasons, the linearity of the tooth surface is too low, resulting in a certain axial force on the planet gear during actual operation. This axial force will press the planet gear and the planet carrier, resulting in wear.

[0006] Chinese Patent CN117537067A discloses a method for preventing wear of the planet gear bearing of a transmission planetary gear set. The main steps include obtaining the tooth direction inclination deviation parameter f hβ and the tooth direction crown amount parameter C β , and modifying the tooth ring and the sun gear according to the obtained tooth direction inclination deviation parameter f hβ and the tooth direction crown amount parameter C β ; assembling the modified tooth ring and the sun gear onto the planet carrier to prevent the planet gear from being eccentrically loaded. However, the disadvantage of this patent is that the steps are complex. Summary of the Utility Model

[0007] The purpose of the utility model is to solve the problems that the first rotating part and the second rotating part in the planetary gear set of the existing transmission system are prone to wear, resulting in a reduced service life of the planetary gear set, and the existing anti-wear methods have complex steps, and to provide a structure for reducing axial wear of the planetary gear set.

[0008] To achieve the above purpose, the technical solution provided by the utility model is:

[0009] A structure for reducing the axial wear of a planetary gear set, which is used to reduce the wear between the shaft ends of a first rotating member and a second rotating member. The special features are as follows:

[0010] It includes a spring, a first gasket, a thrust bearing and a second gasket;

[0011] A first mounting hole is provided at the shaft end of the first rotating member, and a second mounting hole is provided at the shaft end of the second rotating member; both the first mounting hole and the second mounting hole are stepped holes, and the large ends are both located on the side close to the end face;

[0012] The first gasket includes a first cylinder body and a first ring coaxially arranged at one end of the first cylinder body. The inner diameters of the first cylinder body and the first ring are the same, and the outer diameter of the first ring is greater than the outer diameter of the first cylinder body; the first gasket is installed in the first mounting hole, with the first cylinder body located at the small end of the first mounting hole and the first ring located at its large end; the spring is compressed between the bottom surface of the first mounting hole and the first cylinder body; the thrust bearing is arranged at the large end of the first mounting hole and is located outside the first ring; a plurality of arc-shaped protrusions are evenly distributed on the outer circumference of the outer edge of the first ring, and a plurality of grooves adapted to the arc-shaped protrusions are provided at the corresponding positions at the large end of the first mounting hole for keeping the first gasket and the first rotating member at the same rotational speed;

[0013] The second gasket includes a first cylinder, a circular plate arranged on one side of one end of the first cylinder, and a first column body arranged on the other side of the circular plate; the second gasket keeps the same rotational speed as the second rotating member;

[0014] The second gasket is installed in the second mounting hole, with the first cylinder located at the small end of the second mounting hole, the circular plate located at its large end, and the first column body passing through the thrust bearing, the first ring and the first cylinder body in sequence, and the circular plate abuts against the side of the thrust bearing away from the first ring; there is a gap between the end face of the first rotating member and the end face of the second rotating member.

[0015] Further, an interference fit exists between the side surface of the first cylinder and the small end of the second mounting hole; the first column body includes a second cylinder connected to the circular plate at one end, a frustum of a cone with its large end connected to the other end of the second cylinder, and a third cylinder connected to the small end of the frustum of the cone, where the radius of the second cylinder is equal to the radius of the large end of the frustum of the cone, and the radius of the third cylinder is equal to the radius of the small end of the frustum of the cone.

[0016] Further, the spring is in a partially compressed state; the number of arc-shaped protrusions is two; the first rotating member and the second rotating member are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

[0017] Meanwhile, the present utility model also provides another structure for reducing the axial wear of the planetary gear set, which is used to reduce the wear between the shaft ends of the first rotating member and the second rotating member of the planetary gear set. The special features are as follows:

[0018] It includes a spring, a first gasket, a thrust bearing and a second gasket;

[0019] A first mounting hole is provided at the end of the first rotating member, and a second mounting hole is provided at the end of the second rotating member; both the first mounting hole and the second mounting hole are stepped holes, and their large ends are both located on the side close to the end face;

[0020] The first gasket is a second cylinder with one end closed, and a circular convex block is provided at the center of the end face of its closed end; the first gasket is arranged in the first mounting hole and the convex block corresponds to the small end of the first mounting hole, the thrust bearing is arranged between the bottom surface of the large end of the first mounting hole and the closed end of the first gasket, and the convex block passes through the center of the thrust bearing;

[0021] The second gasket includes a first cylinder, a circular plate provided on one side of one end of the first cylinder, and a second cylinder provided on the other side of the circular plate; the second gasket is installed in the second mounting hole, and the first cylinder is located at the small end of the second mounting hole, the circular plate is located at its large end, and the second cylinder extends into the first gasket; the open end of the second cylinder abuts against the circular plate, the second cylinder is a stepped cylinder, and its large-end cylinder is connected to the circular plate; the spring is compressively arranged between the outer side surface of the small-end cylinder of the second cylinder and the inner wall of the first gasket; a plurality of arc-shaped protrusions are evenly distributed on the circumferential surface of the side of the large-end cylinder of the second cylinder of the second gasket, and a plurality of grooves adapted to the arc-shaped protrusions are provided at corresponding positions on the inner wall of the first gasket for making the first gasket and the second gasket maintain the same rotational speed; the second gasket and the second rotating member maintain the same rotational speed;

[0022] There is a gap between the end face of the first rotating member and the end face of the second rotating member.

[0023] Further, an interference fit exists between the side surface of the first cylinder and the small end of the second mounting hole.

[0024] Further, the spring is in a partially compressed state, and the number of the arc-shaped protrusions is two; the first rotating member and the second rotating member are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

[0025] In addition, the present utility model also provides yet another structure for reducing the axial wear of the planetary gear set, which is used to reduce the wear between the shaft ends of the first rotating member and the second rotating member of the planetary gear set. The special features are as follows:

[0026] It includes a spring, a first gasket, a thrust bearing and a second gasket;

[0027] A first mounting hole is provided at the end of the first rotating member, and a second mounting hole is provided at the end of the second rotating member; both the first mounting hole and the second mounting hole are stepped holes, and the large ends are both located on the side close to the end face;

[0028] The first gasket is a second cylinder with one end closed, and a circular convex block is provided at the center of the end face of the closed end; the first gasket is arranged in the first mounting hole and the convex block corresponds to the small end of the first mounting hole, the thrust bearing is arranged between the bottom surface of the large end of the first mounting hole and the closed end of the first gasket, and the convex block passes through the center of the thrust bearing;

[0029] The second gasket includes a first cylinder, a circular plate arranged on one side of one end of the first cylinder, and a third cylinder arranged on the other side of the circular plate; the second gasket is installed in the second mounting hole, and the first cylinder is located at the small end of the second mounting hole, the circular plate is located at its large end, and the third cylinder extends into the first gasket; the open end of the second cylinder abuts against the circular plate, the spring is arranged in the third cylinder, and both ends respectively abut against the bottom of the second cylinder and the bottom of the third cylinder; a plurality of columnar protrusions are evenly distributed on the circumferential side of the third cylinder, and a plurality of grooves adapted to the columnar protrusions are provided at the corresponding positions on the inner side of the first gasket for keeping the first gasket and the second gasket rotating at the same speed; the second gasket rotates at the same speed as the second rotating member;

[0030] There is a gap between the end face of the first rotating member and the end face of the second rotating member.

[0031] Further, a second ring is provided at one end of the third cylinder away from the circular plate, and the outer diameter of the second ring is smaller than the outer diameter of the third cylinder.

[0032] Further, an interference fit is provided between the side surface of the first cylinder and the small end of the second mounting hole.

[0033] Further, the spring is in a partially compressed state, and the number of the columnar protrusions is two; the first rotating member and the second rotating member are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

[0034] Compared with the prior art, the beneficial effects of the present utility model are:

[0035] 1. The structure for reducing the axial wear of the planetary gear set provided by the present utility model reduces the axial wear between the first rotating member and the second rotating member through the mutual cooperation of the thrust bearing, the spring, the first gasket and the second gasket, and improves the service life of the planetary gear set;

[0036] 2. For the structure provided by the present utility model for reducing the axial wear of the planetary gear set, the positions of the spring and the thrust bearing can be changed, and the shapes of the first gasket and the second gasket can also be correspondingly changed to adapt to different assembly situations of the planetary gear set. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a sectional view of the first embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0038] Figure 2 It is a schematic perspective view of the first gasket in the first embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0039] Figure 3 It is a sectional view of the second embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0040] Figure 4 It is a schematic perspective view of the first gasket in the second embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0041] Figure 5 It is a schematic perspective view of the second gasket in the second embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0042] Figure 6 It is a sectional view of the third embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0043] Figure 7 It is a schematic perspective view of the first gasket in the third embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0044] Figure 8 It is a schematic perspective view of the second gasket in the third embodiment of the structure provided by the present utility model for reducing the axial wear of the planetary gear set;

[0045] DESCRIPTION OF REFERENCE NUMERALS:

[0046] 1 - Spring, 2 - First gasket, 3 - Thrust bearing, 4 - Second gasket, 5 - Sun gear, 6 - Planet carrier, 51 - First mounting hole, 61 - Second mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] In order to adapt to different usage scenarios, the present utility model provides three embodiments; the following further describes the present utility model in conjunction with the drawings and three specific embodiments; all three embodiments take the combination of the sun gear and the planet carrier as an example, that is, the first rotating member 5 is the sun gear and the second rotating member 6 is the planet carrier.

[0048] Embodiment 1

[0049] Refer to Figure 1, A structure for reducing axial wear of a planetary gear set, including a spring 1, a first gasket 2, a thrust bearing 3, and a second gasket 4, which are jointly used to reduce the wear between the shaft ends of a first rotating member 5 and a second rotating member 6;

[0050] A first mounting hole 51 is provided at the shaft end of the first rotating member 5, and a second mounting hole 61 is provided at the shaft end of the second rotating member 6; both the first mounting hole 51 and the second mounting hole 61 are stepped holes, and their large ends are both located on the side close to the end face;

[0051] See Figure 2 , The first gasket 2 includes a first cylinder body and a first ring coaxially arranged at one end of the first cylinder body, wherein the inner diameters of the first cylinder body and the first ring are the same, and the outer diameter of the first ring is greater than the outer diameter of the first cylinder body; the first gasket 2 is installed in the first mounting hole 51, with the first cylinder body located at the small end of the first mounting hole 51 and the first ring located at its large end; the spring 1 is compressed between the bottom surface of the first mounting hole 51 and the first cylinder body; the thrust bearing 3 is arranged at the large end of the first mounting hole 51 and is located outside the first ring; two arc-shaped protrusions are evenly distributed on the outer circumference of the outer edge of the first ring, and a plurality of grooves adapted to the arc-shaped protrusions are provided at the corresponding positions at the large end of the first mounting hole 51 for keeping the first gasket 2 and the first rotating member 5 at the same rotational speed;

[0052] The second gasket 4 includes a first cylinder, a circular plate arranged on one side at one end of the first cylinder, and a first column body arranged on the other side of the circular plate; the second gasket 4 keeps the same rotational speed as the second rotating member 6;

[0053] The second gasket 4 is installed in the second mounting hole 61, with the first cylinder located at the small end of the second mounting hole 61, the circular plate located at its large end, the first column body passing through the thrust bearing 3, the first ring, and the first cylinder body in sequence, and the circular plate abutting against the side of the thrust bearing 3 away from the first ring; there is a gap between the end face of the first rotating member 5 and the end face of the second rotating member 6.

[0054] There is an interference fit between the side surface of the first cylinder and the small end of the second mounting hole 61; the first column body includes a second cylinder connected to the circular plate at one end, a frustum of a cone with its large end connected to the other end of the second cylinder, and a third cylinder connected to the small end of the frustum of the cone, wherein the radius of the second cylinder is equal to the radius of the large end of the frustum of the cone, and the radius of the third cylinder is equal to the radius of the small end of the frustum of the cone.

[0055] In order to provide a certain axial force to the thrust bearing 3, the spring 1 is in a partially compressed state. The number of arc-shaped protrusions can be increased according to actual needs.

[0056] Principle of reducing axial wear in this embodiment: The end faces of the first rotating member 5 and the second rotating member 6 are separated by the thrust bearing 3, and a certain axial force is applied to the thrust bearing 3 by the spring 1, so that axial wear will not occur when the rotational speeds of the end faces of the first rotating member 5 and the second rotating member 6 are different.

[0057] Embodiment 2

[0058] See Figure 3 , a structure for reducing axial wear of a planetary gear set, including a spring 1, a first gasket 2, a thrust bearing 3 and a second gasket 4, which are jointly used to reduce the wear between the shaft ends of the first rotating member 5 and the second rotating member 6;

[0059] A first mounting hole 51 is provided at the end of the first rotating member 5, and a second mounting hole 61 is provided at the end of the second rotating member 6; both the first mounting hole 51 and the second mounting hole 61 are stepped holes, and the large ends are both located on the side close to the end face;

[0060] See Figure 4 , the first gasket 2 is a second cylinder with one end closed, and the center of the end face of the closed end has a circular convex block; the first gasket 2 is arranged in the first mounting hole 51 and the convex block corresponds to the small end of the first mounting hole 51, the thrust bearing 3 is arranged between the bottom surface of the large end of the first mounting hole 51 and the closed end of the first gasket 2, and the convex block passes through the center of the thrust bearing 3;

[0061] See Figure 5 , the second gasket 4 includes a first cylinder, a circular plate arranged on one side of one end of the first cylinder, and a second cylinder arranged on the other side of the circular plate; the second gasket 4 is installed in the second mounting hole 61, and the first cylinder is located at the small end of the second mounting hole 61, the circular plate is located at its large end, and the second cylinder extends into the first gasket 2; the open end of the second cylinder abuts against the circular plate, the second cylinder is a stepped cylinder, and its large-end cylinder is connected to the circular plate; the spring 1 is compressively arranged between the outer side surface of the small-end cylinder of the second cylinder and the inner wall of the first gasket 2; a plurality of arc-shaped protrusions are evenly distributed on the circumferential side surface of the large-end cylinder of the second cylinder of the second gasket 4, and a plurality of grooves adapted to the arc-shaped protrusions are provided at corresponding positions on the inner wall of the first gasket 2 for keeping the first gasket 2 and the second gasket 4 at the same rotational speed; the second gasket 4 and the second rotating member 6 keep the same rotational speed;

[0062] There is a gap between the end faces of the first rotating member 5 and the second rotating member 6. There is an interference fit between the side surface of the first cylinder and the small end of the second mounting hole 61.

[0063] In order to provide a certain axial force to the thrust bearing 3, the spring 1 is in a partially compressed state. The number of arc-shaped protrusions can be increased according to actual needs.

[0064] Principle of reducing axial wear in this embodiment: The end faces of the first rotating member 5 and the second rotating member 6 are separated by the thrust bearing 3, and a certain axial force is applied to the thrust bearing 3 by the spring 1, so that axial wear will not occur when the rotational speeds of the end faces of the first rotating member 5 and the second rotating member 6 are different.

[0065] Embodiment Three

[0066] See Figure 6 , a structure for reducing axial wear of a planetary gear set, including a spring 1, a first gasket 2, a thrust bearing 3 and a second gasket 4, which are jointly used to reduce the wear between the shaft ends of the first rotating member 5 and the second rotating member 6;

[0067] A first mounting hole 51 is provided at the end of the first rotating member 5, and a second mounting hole 61 is provided at the end of the second rotating member 6; both the first mounting hole 51 and the second mounting hole 61 are stepped holes, and the large ends are both located on the side close to the end face;

[0068] See Figure 7 , the first gasket 2 is a second cylinder with one end closed, and the center of the end face of the closed end has a circular convex block; the first gasket 2 is arranged in the first mounting hole 51 and the convex block corresponds to the small end of the first mounting hole 51, the thrust bearing 3 is arranged between the bottom surface of the large end of the first mounting hole 51 and the closed end of the first gasket 2, and the convex block passes through the center of the thrust bearing 3;

[0069] See Figure 8 , the second gasket 4 includes a first cylinder, a circular plate arranged on one side of one end of the first cylinder, and a third cylinder arranged on the other side of the circular plate; the second gasket 4 is installed in the second mounting hole 61, and the first cylinder is located at the small end of the second mounting hole 61, the circular plate is located at its large end, and the third cylinder extends into the first gasket 2; the open end of the second cylinder abuts against the circular plate, the spring 1 is arranged in the third cylinder, and both ends respectively abut against the bottom of the second cylinder and the bottom of the third cylinder; a plurality of columnar protrusions are evenly distributed on the circumferential side of the third cylinder, and a plurality of grooves adapted to the columnar protrusions are provided at the corresponding positions on the inner side of the first gasket 2 for making the first gasket 2 and the second gasket 4 maintain the same rotational speed; the second gasket 4 and the second rotating member 6 maintain the same rotational speed;

[0070] There is a gap between the end faces of the first rotating member 5 and the second rotating member 6. There is an interference fit between the side surface of the first cylinder and the small end of the second mounting hole 61.

[0071] For the convenience of assembly, a second ring is provided at one end of the third cylinder away from the circular plate, and the outer diameter of the second ring is smaller than the outer diameter of the third cylinder.

[0072] In order to provide a certain axial force to the thrust bearing 3, the spring 1 is in a partially compressed state. The number of columnar protrusions can be increased according to actual needs.

[0073] Principle of reducing axial wear in this embodiment: The end faces of the first rotating member 5 and the second rotating member 6 are separated by the thrust bearing 3, and a certain axial force is applied to the thrust bearing 3 by the spring 1, so that axial wear will not occur when the rotational speeds of the end faces of the first rotating member 5 and the second rotating member 6 are different.

[0074] It should be noted that the solution provided in the first embodiment is mostly used when the sun gear is at the lower end of the assembly and the planet carrier is at the upper end during the assembly of the planetary gear set sub-assembly; the solution provided in the second embodiment is mostly used when the planet carrier is at the lower end of the assembly and the planet carrier is at the upper end during the assembly of the planetary gear set sub-assembly; the solution provided in the third embodiment is mostly used in occasions where the axial clearance between the sun gear and the planet carrier or between the planet gear and the planet carrier is relatively large, or when the thrust bearing requires a relatively large initial axial force. When addressing the axial wear problem between the planet gear and the planet carrier, the structure of the first embodiment is mostly adopted, and this structure is beneficial for the radial support of the planet gear.

Claims

1. A structure for reducing axial wear of a planetary gear set, which is used to reduce the wear between the shaft ends of the first rotating member (5) and the second rotating member (6) of the planetary gear set; characterized in that: It includes a spring (1), a first gasket (2), a thrust bearing (3) and a second gasket (4); A first mounting hole (51) is provided at the shaft end of the first rotating member (5), and a second mounting hole (61) is provided at the shaft end of the second rotating member (6); both the first mounting hole (51) and the second mounting hole (61) are stepped holes, and the large ends are both located on the side close to the end face; The first gasket (2) includes a first cylinder body and a first ring coaxially arranged at one end of the first cylinder body, wherein the inner diameters of the first cylinder body and the first ring are the same, and the outer diameter of the first ring is greater than the outer diameter of the first cylinder body; the first gasket (2) is installed in the first mounting hole (51), the first cylinder body is located at the small end of the first mounting hole (51), and the first ring is located at its large end; the spring (1) is compressed between the bottom surface of the first mounting hole (51) and the first cylinder body; the thrust bearing (3) is arranged at the large end of the first mounting hole (51) and is located outside the first ring; a plurality of arc-shaped protrusions are evenly distributed on the outer circumference of the outer edge of the first ring, and a plurality of grooves adapted to the arc-shaped protrusions are provided at the corresponding positions at the large end of the first mounting hole (51) for keeping the first gasket (2) and the first rotating member (5) at the same rotational speed; The second gasket (4) includes a first cylinder, a circular plate arranged on one side at one end of the first cylinder, and a first column body arranged on the other side of the circular plate; the second gasket (4) keeps the same rotational speed as the second rotating member (6); The second gasket (4) is installed in the second mounting hole (61), the first cylinder is located at the small end of the second mounting hole (61), the circular plate is located at its large end, the first column body passes through the thrust bearing (3), the first ring and the first cylinder body in sequence, and the circular plate abuts against the side of the thrust bearing (3) away from the first ring; there is a gap between the end face of the first rotating member (5) and the end face of the second rotating member (6).

2. The structure for reducing axial wear of a planetary gear set according to claim 1, characterized in that: There is an interference fit between the side surface of the first cylinder and the small end of the second mounting hole (61); the first column body includes a second cylinder connected to the circular plate at one end, a frustum of a cone with its large end connected to the other end of the second cylinder, and a third cylinder connected to the small end of the frustum of the cone, wherein the radius of the second cylinder is equal to the radius of the large end of the frustum of the cone, and the radius of the third cylinder is equal to the radius of the small end of the frustum of the cone.

3. The structure for reducing axial wear of a planetary gear set according to claim 2, characterized in that: The spring (1) is in a partially compressed state; the number of the arc-shaped protrusions is two; the first rotating member (5) and the second rotating member (6) are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

4. A structure for reducing axial wear of a planetary gear set, which is used to reduce the wear between the shaft ends of the first rotating member (5) and the second rotating member (6) of the planetary gear set; characterized in that: It includes a spring (1), a first gasket (2), a thrust bearing (3) and a second gasket (4); An end of the first rotating member (5) is provided with a first mounting hole (51), and an end of the second rotating member (6) is provided with a second mounting hole (61); both the first mounting hole (51) and the second mounting hole (61) are stepped holes, and the large ends are both located on the side close to the end face; The first gasket (2) is a second cylinder with one end closed, and the center of the end face of the closed end is provided with a circular convex block; the first gasket (2) is arranged in the first mounting hole (51) and the convex block corresponds to the small end of the first mounting hole (51), the thrust bearing (3) is arranged between the bottom surface of the large end of the first mounting hole (51) and the closed end of the first gasket (2), and the convex block passes through the center of the thrust bearing (3); The second gasket (4) includes a first cylinder, a circular plate arranged on one end of the first cylinder on one side, and a second cylinder arranged on the other side of the circular plate; the second gasket (4) is installed in the second mounting hole (61), and the first cylinder is located at the small end of the second mounting hole (61), the circular plate is located at its large end, the second cylinder extends into the first gasket (2), and the open end of the second cylinder abuts against the circular plate; the second cylinder is a stepped cylinder, and its large-end cylinder is connected to the circular plate; the spring (1) is compressively arranged between the outer side surface of the small-end cylinder of the second cylinder and the inner wall of the first gasket (2); a plurality of arc-shaped protrusions are evenly distributed in the circumferential direction of the side surface of the large-end cylinder of the second cylinder of the second gasket (4), and a plurality of grooves adapted to the arc-shaped protrusions are arranged at corresponding positions on the inner wall of the first gasket (2) for keeping the first gasket (2) and the second gasket (4) at the same rotational speed; the second gasket (4) and the second rotating member (6) keep the same rotational speed; There is a gap between the end face of the first rotating member (5) and the end face of the second rotating member (6).

5. The structure for reducing the axial wear of the planetary gear set according to claim 4, characterized in that: There is an interference fit between the side surface of the first cylinder and the small end of the second mounting hole (61).

6. The structure for reducing the axial wear of the planetary gear set according to claim 5, characterized in that: The spring (1) is in a partially compressed state, and the number of the arc-shaped protrusions is two; the first rotating member (5) and the second rotating member (6) are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

7. A structure for reducing the axial wear of a planetary gear set, which is used to reduce the wear between the shaft ends of the first rotating member (5) and the second rotating member (6) of the planetary gear set; characterized in that: It includes a spring (1), a first gasket (2), a thrust bearing (3) and a second gasket (4); An end of the first rotating member (5) is provided with a first mounting hole (51), and an end of the second rotating member (6) is provided with a second mounting hole (61); both the first mounting hole (51) and the second mounting hole (61) are stepped holes, and the large ends are both located on the side close to the end face; The first gasket (2) is a second cylinder body with one end closed, and a circular convex block is provided at the center of the end face of the closed end; the first gasket (2) is arranged in the first mounting hole (51) and the convex block corresponds to the small end of the first mounting hole (51), the thrust bearing (3) is arranged between the bottom surface of the large end of the first mounting hole (51) and the closed end of the first gasket (2), and the convex block passes through the center of the thrust bearing (3); The second gasket (4) includes a first cylinder, a circular plate arranged on one side of one end of the first cylinder, and a third cylinder body arranged on the other side of the circular plate; the second gasket (4) is installed in the second mounting hole (61), the first cylinder is located at the small end of the second mounting hole (61), the circular plate is located at its large end, the third cylinder body extends into the first gasket (2), and the open end of the second cylinder body abuts against the circular plate; the spring (1) is arranged in the third cylinder body, and both ends respectively abut against the bottom of the second cylinder body and the bottom of the third cylinder body; a plurality of columnar protrusions are evenly distributed on the circumferential surface of the third cylinder body, and a plurality of grooves adapted to the columnar protrusions are arranged at corresponding positions on the inner side of the first gasket (2) for keeping the first gasket (2) and the second gasket (4) at the same rotational speed; the second gasket (4) and the second rotating member (6) keep the same rotational speed; There is a gap between the end face of the first rotating member (5) and the end face of the second rotating member (6).

8. The structure for reducing axial wear of the planetary gear set according to claim 7, wherein: A second ring is provided at one end of the third cylinder body away from the circular plate, and the outer diameter of the second ring is smaller than the outer diameter of the third cylinder body.

9. The structure for reducing axial wear of the planetary gear set according to claim 8, wherein: An interference fit exists between the side surface of the first cylinder and the small end of the second mounting hole (61).

10. The structure for reducing axial wear of the planetary gear set according to claim 9, wherein: The spring (1) is in a partially compressed state, and the number of the columnar protrusions is two; the first rotating member (5) and the second rotating member (6) are a combination of a sun gear and a planet carrier, a combination of a planet gear and a planet carrier, or a combination of a sun gear and a sun gear.

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