Thrust rod bearing ball pin assembly

Abstract

The utility model discloses a thrust rod bearing ball pin assembly, and relates to the technical field of automobile parts. Comprising a ball pin with a shaft part and a ball body and a lining, a ball body mounting cavity is formed in an inner cavity of the lining, the ball body is mounted in the ball body mounting cavity, a sleeve is mounted on the periphery of the lining, and a left sealing cover and a right sealing cover which are matched with the shaft part of the ball pin are arranged at the two ends of the sleeve; and a group of second oil injection holes for communicating the first oil storage cavity with the ball body mounting cavity are formed in the bushing. By arranging the first oil storage cavity, the oil storage amount can be increased, enough lubricating oil is provided for rotation of the ball pin and the bearing, the left oil seal and the right oil seal are additionally arranged, the sealing performance of the thrust rod is effectively guaranteed, the lubricating effect between the ball pin and the bush is improved, and therefore the service life of the thrust rod is prolonged.

Description

Technical Field

[0001] This utility model relates to a thrust rod bearing ball pin assembly, and pertains to the technical field of automotive parts. Background Technology

[0002] Thrust rods are mainly used in single-axle or double-rear-axle heavy-duty trucks or buses to connect the frame and axle. The bearing ball pin assembly plays an important role in this connection. The flexibility of the ball pin rotation determines the service life of the bearing ball pin assembly, which in turn directly affects the service life of the axle and transmission system.

[0003] To achieve this, grease needs to be applied between the ball pin and the mating bushing during installation of the thrust rod, and then both ends are sealed. However, there is no structure on the thrust rod that allows for the addition of grease after installation. Therefore, after a period of use, the lubricating ability of the pre-installed grease deteriorates, thereby accelerating the friction between the ball pin and the bushing, which in turn accelerates the wear of the ball pin or bushing and greatly reduces the service life of the thrust rod. Utility Model Content

[0004] The purpose of this invention is to design a thrust rod bearing ball pin assembly that can extend its service life.

[0005] This utility model includes a ball pin with a shaft and a ball and a bushing. The inner cavity of the bushing forms a ball mounting cavity and the ball is installed therein. A sleeve is installed around the bushing. The two ends of the sleeve have a left cover and a right cover that cooperate with the shaft of the ball pin. A first oil storage cavity is provided between the sleeve and the bushing. The bushing has a set of second oil injection holes that enable the first oil storage cavity to communicate with the ball mounting cavity.

[0006] Furthermore, a left support seat and a right support seat are provided between the casing and the bushing, and the cavity between the adjacent end faces of the left support seat and the right support seat forms the first oil storage cavity.

[0007] Furthermore, the left and right support seats have grooves at the center of their circumferences that correspond to the position of the sleeve, and the sleeve is disposed in the groove formed by the left and right support seats.

[0008] Furthermore, a left support seat and a right support seat are provided between the casing and the bushing. A cavity is formed between the adjacent end faces of the left support seat and the right support seat. An annular groove corresponding to the position of the cavity is provided on the outer surface of the bushing, and together with the cavity, they form a first oil storage cavity.

[0009] Furthermore, the casing is provided with a first oil injection hole that connects to the first oil storage cavity through its outer surface.

[0010] Furthermore, the bushing is composed of an upper bushing and a lower bushing. The upper bushing and the lower bushing have at least one pair of circumferential positioning grooves that are corresponding in position and can communicate with each other. A positioning spring ring is provided in the annular groove formed by each pair of positioning grooves.

[0011] Furthermore, a left inner protruding ring and a right inner protruding ring are respectively provided at the corresponding positions of the left and right support seats and the outer ends of the ball pin. An upper bushing and a lower bushing are provided between the left inner protruding ring and the right inner protruding ring. A left oil seal and a right oil seal made of flexible material are respectively provided on the outer sides of the left inner protruding ring and the right inner protruding ring to cooperate with the shaft part of the ball pin. A left cover and a right cover are respectively provided on the outer sides of the left oil seal and the right oil seal to cooperate with the outer surfaces of the left support seat and the right support seat.

[0012] Furthermore, the outer surfaces of the first left oil seal and the first right oil seal are respectively provided with protruding rings, and the outer peripheral surfaces of each protruding ring are respectively provided with a second left spring ring and a second right spring ring.

[0013] Furthermore, the inner surfaces of the upper and lower bushings have corresponding grooves to form a second oil storage cavity, which is connected to the first oil storage cavity through a second oil injection hole.

[0014] Furthermore, the first oil storage chamber and the second oil storage chamber are in a ring shape with corresponding positions and consistent directions. Each second oil injection hole is distributed circumferentially along the upper and lower bushings, and the opening direction of each oil injection hole is set radially along the upper or lower bushing.

[0015] The advantages of this invention are:

[0016] This invention creates a first oil storage chamber by forming a cavity between the adjacent end faces of the left and right support seats, and this first oil storage chamber connects to the space between the ball pin and the bushing. This allows the invention to store more grease and supply it to the space between the ball pin and the bushing, thereby extending the service life of the ball pin and the bushing. Furthermore, this invention includes a second oil storage chamber within the bushing that communicates with the first oil storage chamber. This not only increases the oil storage capacity but also allows grease to be distributed on the surface of the ball pin during relative movement between the ball pin and the bushing, while simultaneously introducing grease from the first oil storage chamber into the second oil storage chamber.

[0017] In addition, the first oil injection hole on the sleeve of this utility model facilitates the injection of grease into the first oil storage chamber during the installation of this utility model, thereby enabling the grease to fill the first oil storage chamber and the second oil storage chamber, thus achieving the maximum oil storage capacity.

[0018] In addition to the caps at both ends in the prior art, a left oil seal and a right oil seal are added to the cavity between the ball pin and the bushing, thereby enhancing the sealing effect of this utility model.

[0019] In summary, by improving the lubrication between the ball pin and the bushing through the above methods, the service life of the thrust rod can be increased. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0022] Figure 3 for Figure 2 Cross-sectional view along the BB direction;

[0023] Figure 4 for Figure 1 Disassembled anatomical view of the bushing in the AA direction;

[0024] Figure 5 for Figure 1 Cross-sectional view of the sleeve in the AA direction;

[0025] Figure 6 for Figure 1 Disassembly and anatomical view of the right support seat in the AA direction;

[0026] Figure 7 for Figure 1 A cross-sectional view of the right cap in the middle AA direction;

[0027] Among them: 1. Ball pin, 101. Shaft, 102. Ball, 2. Bushing, 201. Upper bushing, 202. Lower bushing, 203. Positioning groove, 204. Second oil filling hole, 3. Left support seat, 301. Left inner protruding ring, 302. Left oil seal, 4. Sleeve, 401. First oil filling hole, 5. Right support seat, 501. Right inner protruding ring, 502. Right oil seal, 6. Right cover, 7. Left cover, 8. Positioning spring ring, 9. Protruding ring, 10. Second left spring ring, 11. Second right spring ring, 12. First oil storage chamber, 13. Second oil storage chamber. Detailed Implementation

[0028] Unless otherwise specified, the left-right, up-down, in-out and circumferential directions of this utility model are based on... Figure 2 Based on.

[0029] As shown in the figure, this embodiment includes a pin 1, which is composed of shaft portions 101 on both sides and a ball 102 in the middle. The outer periphery of the ball is covered with a bushing 2, which is formed by the upper bushing 201 and the lower bushing 202 fastened together. Its inner cavity forms a ball mounting cavity and its inner surface is adapted to the surface of the ball 102.

[0030] The inner surfaces of the upper bushing 201 and the lower bushing 202 have corresponding grooves, which are located at the middle of the circumference of the upper bushing 201 and the lower bushing 202, and have a certain width. The two grooves on the inner surfaces of the upper bushing 201 and the lower bushing 202 are connected end to end to form a connected annular groove, thereby forming a second oil storage cavity 13. A set of second oil injection holes 204 are distributed along the circumference of the second oil storage cavity 13, which leads to the outer surfaces of the upper bushing 201 and the lower bushing 202.

[0031] The outer surfaces of the upper bushing 201 and the lower bushing 202 have grooves concentric with the second oil storage cavity 13, and these two grooves on the outer surfaces of the upper bushing 201 and the lower bushing 202 are connected end to end to form an annular groove on the outer surface of the bushing 2. The second oil injection hole 204 communicates with the annular groove on the outer surface of the bushing 2.

[0032] On the outer surface of the upper bushing 201 and the lower bushing 202, near their outer ends, there is a pair of corresponding and interconnecting circumferential positioning grooves 203. These grooves form annular grooves near the left and right ends of the bushing 2, respectively. A positioning spring ring 8 is provided in each annular groove formed by the pair of positioning grooves 203 to assist in the stability of the overall shape of the bushing 2. The number of pairs of positioning grooves can be determined according to the situation. Generally, two on the left and two on the right can be used, but the number can also be increased to enhance the stability of the bushing 2.

[0033] A support base is installed around the bushing 2, consisting of a left support base 3 and a right support base 5. A left inner protruding ring 301 and a right inner protruding ring 501 are respectively provided at the corresponding positions of the left and right ends of the sphere 102. These two inner protruding rings mate with the left and right end faces of the bushing 2 to position the bushing 2. A gap is left between the adjacent ends of the left support base 3 and the right support base 5, corresponding to the position of the annular groove on the outer surface of the bushing 2. This gap, together with the annular groove on the outer surface of the bushing 2, forms the first oil storage cavity 12. That is, the first oil storage cavity 12 and the second oil storage cavity 13 are annularly positioned and aligned. The opening direction of each second oil injection hole 204 is radially arranged along the upper bushing 201 or the lower bushing 202. In the specific manufacturing of this utility model, only the gap between the left support base 3 and the right support base 5 can be used as the first oil storage cavity 12, or only the annular groove on the outer surface of the bushing 2 can be used as the first oil storage cavity 12, but using both together results in a larger oil storage capacity.

[0034] A groove is provided in the middle of the circumference of the left support 3 and the right support 5. The sleeve 4 is placed in the groove formed by the left support 3 and the right support 5 to seal the first oil storage chamber 12. Grease is added to the first oil storage chamber 12 and the second oil storage chamber 13 during installation. However, one or more first oil filling holes 401 can also be provided on the sleeve 4 corresponding to the position of the first oil storage chamber 12, so that grease can still be added after the sleeve 4 is installed and the sphere mounting cavity is sealed, thereby filling the first oil storage chamber 12 and the second oil storage chamber 13. The first oil filling hole 401 is closed after this embodiment is installed into the mounting hole of the thrust rod.

[0035] A left oil seal 302 and a right oil seal 502, made of flexible material, are respectively provided on the outer side of the left inner protruding ring 301 and the right inner protruding ring 501 of the bushing 2 to cooperate with the shaft portion 101 of the ball pin 1. The outer surfaces of the left oil seal 302 and the right oil seal 502 are respectively provided with protruding rings 9, and a second left spring ring 10 and a second right spring ring 11 are respectively provided on the outer peripheral surface of each protruding ring 9.

[0036] The outer sides of the left oil seal 302 and the right oil seal 502 are respectively provided with a left cover 7 and a right cover 6 that mate with the outer surfaces of the left support seat 3 and the right support seat 5.

[0037] In this embodiment, during use, the upper bushing 201 and the lower bushing 202 are first fitted with the ball 102 of the ball pin 1. The upper bushing 201 and the lower bushing 202 are then tightly fixed by the positioning spring ring 8. The sleeve 4 is then inserted from one end of the ball pin 1. Next, the left support seat 3 and the right support seat 5 are respectively inserted from the left and right ends of the ball pin 1. Through interference fit, the bushing 2, the sleeve 4, the left support seat 3, and the right support seat 5 are fixedly connected. The second left spring ring 10 and the second... The right spring ring 11 is fitted onto the outer circumference of the protruding ring 9 on the outer side of the left oil seal 302 and the right oil seal 502 to ensure the sealing of the ball mounting cavity and prevent grease leakage. Then, the left and right caps 7 and 6 are fitted onto both ends of the ball pin 1. Oil is then injected into the first oil reservoir 12 and the second oil reservoir 13 through the first oil injection hole 401 on the sleeve 4. After completion, it is installed into the ball seat on the thrust rod, where the inner wall of the ball seat seals the first oil injection hole 401. The caps at both ends are then pressed together by the outer components to complete the assembly. This achieves a double-layer seal, preventing lubricant leakage, ensuring the flexibility of rotation between the ball pin 1 and the bushing 2, and enhancing the ability to withstand impacts and resist lateral forces, thus improving service life.

Claims

1. A thrust rod bearing ball pin assembly, comprising a ball pin with a shaft and a ball, and a bushing, wherein the inner cavity of the bushing forms a ball mounting cavity and the ball is mounted therein. The bushing is surrounded by a sleeve, and the sleeve has a left and a right cap at both ends that mate with the shaft of the ball pin. The characteristic is that a first oil storage cavity is provided between the sleeve and the bushing, and the bushing has a set of second oil injection holes that allow the first oil storage cavity to communicate with the ball mounting cavity; a left support seat and a right support seat are provided between the sleeve and the bushing, and the cavity between the adjacent end faces of the left support seat and the right support seat forms the first oil storage cavity.

2. The thrust rod bearing ball pin assembly according to claim 1, characterized in that: The left and right support seats have grooves in the middle of their circumferential surfaces that correspond to the position of the sleeve, and the sleeve is disposed in the groove formed by the left and right support seats.

3. The thrust rod bearing ball pin assembly according to claim 1, characterized in that: A left support seat and a right support seat are provided between the casing and the bushing. A cavity is formed between the adjacent end faces of the left support seat and the right support seat. An annular groove corresponding to the position of the cavity is provided on the outer surface of the bushing, and together with the cavity, they form a first oil storage cavity.

4. The thrust rod bearing ball pin assembly according to claim 1, 2, or 3, characterized in that: The casing is provided with a first oil injection hole that connects to the first oil storage chamber through its outer surface.

5. The thrust rod bearing ball pin assembly according to claim 1, 2, or 3, characterized in that: The bushing is composed of an upper bushing and a lower bushing. The upper bushing and the lower bushing have at least one pair of circumferential positioning grooves that are corresponding in position and can communicate with each other. A positioning spring ring is provided in the annular groove formed by each pair of positioning grooves.

6. The thrust rod bearing ball pin assembly according to claim 5, characterized in that: A left inner protruding ring and a right inner protruding ring are respectively provided at the corresponding positions of the left and right support seats and the outer ends of the ball pin. An upper bushing and a lower bushing are provided between the left inner protruding ring and the right inner protruding ring. A left oil seal and a right oil seal made of flexible material are respectively provided on the outer side of the left inner protruding ring and the right inner protruding ring to cooperate with the shaft part of the ball pin. A left cover and a right cover are respectively provided on the outer side of the left oil seal and the right oil seal to cooperate with the outer surface of the left support seat and the right support seat.

7. The thrust rod bearing ball pin assembly according to claim 6, characterized in that: The outer surfaces of the left and right oil seals are respectively provided with protruding rings, and the outer circumferential surfaces of each protruding ring are respectively provided with a second left spring ring and a second right spring ring.

8. The thrust rod bearing ball pin assembly according to claim 6 or 7, characterized in that: The inner surfaces of the upper and lower bushings have corresponding grooves to form a second oil storage cavity, which is connected to the first oil storage cavity through a second oil injection hole.

9. The thrust rod bearing ball pin assembly according to claim 8, characterized in that: The first oil storage chamber and the second oil storage chamber are in a ring shape with corresponding positions and consistent directions. Each second oil injection hole is distributed along the circumference of the upper and lower bushings, and the opening direction of each oil injection hole is set along the radial direction of the upper or lower bushing.

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