Ball cage type constant velocity universal joint with long service life

Abstract

The utility model discloses a ball cage type constant velocity universal joint with long service life, and relates to the technical field of universal joints, the ball cage type constant velocity universal joint with long service life comprises a device main body, a star-shaped sleeve is arranged in the device main body, the ball cage type constant velocity universal joint with long service life is also provided with a stable transmission mechanism, comprising a rotating shaft, a transmission shaft, a fixing column, four long rods and four limiting blocks, a transmission rod is fixedly connected to the rear surface of a starlike sleeve, the four long rods are symmetrical about the center point of the rear surface of the transmission rod, a universal joint can enable the rotating shaft to be separated from the transmission shaft along with vibration, and the universal joint can also stably transmit power; at the moment, the rotating shaft and the transmission shaft continuously extend and contract along with bumping of the road surface, direct influences of impact and vibration on the whole transmission system are reduced, the situation that the strength and durability of the transmission rod are reduced due to material fatigue is avoided, the risk of breakage or damage is reduced, and the service life of the ball cage type constant velocity universal joint is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, in particular to a ball cage type constant velocity universal joint with a long service life. Background Art

[0002] The ball cage type constant velocity joint is a mechanical device used to transmit power or torque while allowing the axis to rotate in different directions. It usually consists of two bearing rings (outer ring and inner ring) and a ball cage, which contains small balls that can roll on the inner and outer surfaces of the rings, allowing the shaft to rotate in various directions without affecting the transmitted torque or power. This design can maintain the stability of the transmitted torque or power under different angles and deviations in the direction of the axis. It is often used in automotive transmission systems, industrial machinery and other applications that need to transmit torque in different directions.

[0003] At present, the existing universal joint (such as patent number: CN218440300U) discloses a long-life ball cage type constant velocity universal joint, which relates to the technical field of universal joints. It includes a driving shaft, a star sleeve, a steel ball, a spherical shell, a self-lubricating ball cage and a dust cover. The star sleeve is connected to the outer spline end of the driving shaft through an inner spline, the star sleeve is located in the spherical shell, the outer wall of the star sleeve is provided with an inner slideway, the inner wall of the spherical shell is provided with an outer raceway, the steel ball is located in the inner slideway and the outer raceway, and the spherical shell is connected to the star sleeve in a rolling manner through the steel ball. The long-life ball cage type constant velocity universal joint improves the currently used ball cage, takes a high-strength copper alloy as a matrix and regularly arranges a certain proportion of solid lubricants according to the working conditions. This copper-based inlaid solid lubricant combines the high load-bearing and high wear resistance of the copper alloy with the self-lubricating performance of the solid lubricant, so that it has an extremely low wear rate during use, a long service life, and greatly reduces the maintenance cost of the universal joint.

[0004] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems:

[0005] When encountering bumps and uneven roads, the ball cage constant velocity joint will be subjected to impact or vibration pressure. These additional pressures may be transmitted to the transmission rod. Long-term exposure to additional impact and vibration will cause fatigue and accelerated loss of the transmission rod material. Material fatigue will reduce the strength and durability of the transmission rod, increase the risk of breakage or damage, and reduce the service life of the ball cage constant velocity joint. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a long-life ball cage type constant velocity universal joint, which solves the technical problem that when encountering bumpy and uneven roads, the ball cage type constant velocity universal joint will be subjected to impact or vibration pressure, and these additional pressures may be transmitted to the transmission rod. Long-term exposure to additional impact and vibration will lead to accelerated fatigue and loss of the transmission rod material. Material fatigue will reduce the strength and durability of the transmission rod, increase the risk of breakage or damage, and reduce the service life of the ball cage type constant velocity universal joint. When the car encounters a bumpy road and vibrates, the universal joint will cause the rotating shaft to separate from the transmission shaft with the vibration. Since the transmission shaft is a polygonal structure and the transmission shaft is clamped with the rotating shaft, the universal joint can also stably transmit power when the rotating shaft is slightly separated from the transmission shaft. As the road surface continues to bump, the rotating shaft and the transmission shaft continue to extend and contract following the bumps of the road surface, reducing the direct impact of impact and vibration on the entire transmission system, avoiding the reduction of the strength and durability of the transmission rod due to material fatigue, reducing the risk of breakage or damage, and improving the service life of the ball cage type constant velocity universal joint.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A long-life ball cage type constant velocity universal joint comprises a device main body, wherein a star-shaped sleeve is arranged inside the device main body. The long-life ball cage type constant velocity universal joint is also provided with a stable transmission mechanism, comprising a rotating shaft, a transmission shaft, a fixed column, four long rods and four limit blocks. The rear surface of the star-shaped sleeve is fixedly connected with the transmission rod, the four long rods are symmetrical about the center point of the rear surface of the transmission rod, and the front surface of each long rod is fixedly connected with the rear surface of the transmission rod, a connecting column is arranged at the rear end of the transmission rod, and a groove 1 is penetrated through the front surface of the connecting column, the transmission shaft is located in the groove 1, and the front surface of the transmission shaft is fixedly connected with the center point of the rear surface of the transmission rod, the front surface of the rotating shaft is fixedly connected to the rear surface of the connecting column, and a transmission groove corresponding to the transmission shaft is penetrated through the front surface of the rotating shaft, and the transmission shaft is movably connected with the rotating shaft through the transmission groove.

[0011] Preferably, a connection port is provided on the rear surface of the rotating shaft, and a front surface of the connection port is fixedly connected to the rear surface of the rotating shaft.

[0012] Preferably, the surface of the rotating shaft is provided with four limiting grooves corresponding to the position of the long rod, and a limiting block is arranged inside each limiting groove.

[0013] Preferably, a fixing column is arranged at the front end of the transmission rod, and a second groove is penetrated through the front surface of the fixing column, and the fixing column is movably sleeved with the rotating shaft through the second groove.

[0014] Preferably, the four limit blocks all correspond to the positions of the fixed column, and the front surface of the fixed column is fixedly connected to the rear surfaces of the four long rods, and the four limit blocks are fixedly connected to the inner wall of the fixed column.

[0015] Preferably, a cleaning ring is fixedly connected to the inner wall of the connecting column, and the transmission shaft is located inside the cleaning ring.

[0016] (III) Beneficial effects

[0017] 1. When the car encounters a bumpy road and vibrates, the universal joint will cause the rotating shaft to separate from the transmission shaft as the vibration occurs. Since the transmission shaft is a polygonal structure and the transmission shaft is clamped with the rotating shaft, the universal joint can still transmit power stably when the rotating shaft is slightly separated from the transmission shaft. As the road continues to bump, the rotating shaft and the transmission shaft continue to extend and contract following the bumps in the road, reducing the direct impact of shock and vibration on the entire transmission system, avoiding material fatigue that will reduce the strength and durability of the transmission rod, reducing the risk of breakage or damage, and increasing the service life of the ball cage constant velocity universal joint.

[0018] 2. When the rotating shaft and the transmission shaft continuously extend and contract following the bumps of the road, the connecting column will drive the cleaning ring to move along with the movement of the rotating shaft. When the cleaning ring moves, it will clean the part of the transmission shaft exposed to the rotating shaft, thus preventing some impurities from entering the transmission groove in dusty and muddy environments, causing increased friction and poor lubrication, accelerating the wear and aging of parts, and allowing the transmission shaft to be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural diagram of the entire utility model;

[0021] Figure 2 This is a structural diagram of the rotating shaft of the utility model;

[0022] Figure 3 This is a structural diagram of the transmission shaft of the utility model;

[0023] Figure 4 It is a structural diagram of the long rod and the limit block of the utility model.

[0024] Legend: 1. Device body; 2. Star-shaped sleeve; 3. Transmission rod; 4. Rotating shaft; 5. Connection port; 6. Long rod; 7. Transmission shaft; 8. Fixed column; 9. Connecting column; 10. Groove 1; 11. Cleaning ring; 12. Limit block; 13. Transmission groove; 14. Limit groove; 15. Groove 2. DETAILED DESCRIPTION

[0025] The embodiment of the present application provides a long-life ball cage type constant velocity universal joint, which effectively solves the technical problem that when encountering bumps and uneven roads, the ball cage type constant velocity universal joint will be subjected to impact or vibration pressure, and these additional pressures may be transmitted to the transmission rod. Long-term exposure to additional impact and vibration will cause fatigue and accelerated loss of the transmission rod material. Material fatigue will reduce the strength and durability of the transmission rod, increase the risk of breakage or damage, and reduce the service life of the ball cage type constant velocity universal joint. When the car encounters a bumpy road and vibrates, the universal joint will cause the rotating shaft to separate from the transmission shaft due to the vibration. Since the transmission shaft is a polygonal structure and the transmission shaft is clamped with the rotating shaft, the universal joint can still stably transmit power when the rotating shaft is slightly separated from the transmission shaft. As the road surface continues to bump, the rotating shaft and the transmission shaft continue to extend and contract following the bumps of the road surface, reducing the direct impact of impact and vibration on the entire transmission system, avoiding material fatigue that will reduce the strength and durability of the transmission rod 3, reducing the risk of breakage or damage, and increasing the service life of the ball cage type constant velocity universal joint.

[0026] Example

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that when encountering bumps and uneven roads, the ball cage constant velocity universal joint will be subjected to impact or vibration pressure, and these additional pressures may be transmitted to the transmission rod. Long-term exposure to additional impact and vibration will cause fatigue and accelerated loss of the transmission rod material. Material fatigue will reduce the strength and durability of the transmission rod, increase the risk of breakage or damage, and reduce the service life of the ball cage constant velocity universal joint. The overall idea is as follows:

[0028] In view of the problems existing in the prior art, the utility model provides a long-life ball cage type constant velocity universal joint, comprising a device body 1, a star-shaped sleeve 2 is arranged inside the device body 1, and the long-life ball cage type constant velocity universal joint is also provided with a stable transmission mechanism, including a rotating shaft 4, a transmission shaft 7, a fixed column 8, four long rods 6 and four limit blocks 12, the rear surface of the star-shaped sleeve 2 is fixedly connected with a transmission rod 3, the four long rods 6 are symmetrical about the center point of the rear surface of the transmission rod 3, and the front surface of each long rod 6 is fixedly connected to the rear surface of the transmission rod 3, the rear end of the transmission rod 3 is provided with a connecting column 9, and the front surface of the connecting column 9 is penetrated by a hole 12. There is a groove 10, the transmission shaft 7 is located in the groove 10, and the front surface of the transmission shaft 7 is fixedly connected to the center point of the rear surface of the transmission rod 3, the front surface of the rotating shaft 4 is fixedly connected to the rear surface of the connecting column 9, and the front surface of the rotating shaft 4 is penetrated by a transmission groove 13 corresponding to the transmission shaft 7, the transmission shaft 7 is movably connected with the rotating shaft 4 through the transmission groove 13, when the car encounters a bumpy road and vibrates, the universal joint will make the rotating shaft 4 separate from the transmission shaft 7 with the vibration, because the transmission shaft 7 is a polygonal structure, and the transmission shaft 7 is connected with the rotating shaft 4, so when the rotating shaft 4 is slightly separated from the transmission shaft 7, the universal joint can also stably transmit power.

[0029] A connection port 5 is provided on the rear surface of the rotating shaft 4, and the front surface of the connection port 5 is fixedly connected to the rear surface of the rotating shaft 4. Four limit grooves 14 corresponding to the positions of the long rods 6 are provided on the surface of the rotating shaft 4, and a limit block 12 is provided inside each limit groove 14. A fixed column 8 is provided at the front end position of the transmission rod 3, and a groove 2 15 is provided through the front surface of the fixed column 8. The fixed column 8 is movably connected to the rotating shaft 4 through the groove 2 15. The four limit blocks 12 correspond to the positions of the fixed column 8, and the front surface of the fixed column 8 is fixedly connected to the rear surfaces of the four long rods 6. The four limit blocks 12 are fixedly connected to the inner wall of the fixed column 8. As the road surface continues to bump, the rotating shaft 4 and the transmission shaft 7 continue to extend and contract following the bumps of the road surface, reducing the direct impact of impact and vibration on the entire transmission system, avoiding material fatigue that will reduce the strength and durability of the transmission rod 3, reducing the risk of breakage or damage, and improving the service life of the ball cage type constant velocity universal joint.

[0030] A cleaning ring 11 is fixedly connected to the inner wall of the connecting column 9, and the transmission shaft 7 is located inside the cleaning ring 11. When the rotating shaft 4 and the transmission shaft 7 continuously extend and contract following the bumps of the road, the connecting column 9 will drive the cleaning ring 11 to move following the movement of the rotating shaft 4. When the cleaning ring 11 moves, the cleaning ring 11 will clean the part of the transmission shaft 7 exposed to the rotating shaft 4, thereby preventing some impurities from entering the transmission groove 13 in a dusty and muddy environment, resulting in increased friction and poor lubrication, and accelerating the wear and aging of parts, so that the transmission shaft 7 can be cleaned.

[0031] Working principle:

[0032] When the car encounters a bumpy road and vibrates, the universal joint will cause the rotating shaft 4 to separate from the transmission shaft 7 as the vibration occurs. Since the transmission shaft 7 is a polygonal structure and the transmission shaft 7 is engaged with the rotating shaft 4, the universal joint can still transmit power stably when the rotating shaft 4 is slightly separated from the transmission shaft 7. As the road surface continues to bump, the rotating shaft 4 and the transmission shaft 7 continue to extend and contract following the bumps of the road surface, reducing the direct impact of impact and vibration on the entire transmission system, avoiding material fatigue that will reduce the strength and durability of the transmission rod 3, reducing the risk of breakage or damage, and increasing the service life of the ball cage constant velocity universal joint. When the rotating shaft 4 and the transmission shaft 7 continue to extend and contract following the bumps of the road surface, the connecting column 9 will drive the cleaning ring 11 to move following the movement of the rotating shaft 4. When the cleaning ring 11 moves, the cleaning ring 11 will clean the part of the transmission shaft 7 exposed to the rotating shaft 4, avoiding some magazines from entering the transmission groove 13 in a dusty and muddy environment, resulting in increased friction and poor lubrication, accelerating the wear and aging of components, and allowing the transmission shaft 7 to be cleaned.

[0033] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A long-life ball cage type constant velocity universal joint, comprising a device body (1), wherein a star-shaped sleeve (2) is arranged inside the device body (1), characterized in that: The long-life ball cage type constant velocity universal joint is also provided with a stable transmission mechanism, comprising a rotating shaft (4), a transmission shaft (7), a fixing column (8), four long rods (6) and four limit blocks (12); the rear surface of the star-shaped sleeve (2) is fixedly connected to the transmission rod (3); the four long rods (6) are symmetrical about the center point of the rear surface of the transmission rod (3); the front surface of each long rod (6) is fixedly connected to the rear surface of the transmission rod (3); a connecting column (9) is provided at the rear end of the transmission rod (3); a groove (10) is penetrated through the front surface of the connecting column (9); the transmission shaft (7) is located in the groove (10); and the front surface of the transmission shaft (7) is fixedly connected to the center point of the rear surface of the transmission rod (3); The front surface of the rotating shaft (4) is fixedly connected to the rear surface of the connecting column (9), and a transmission groove (13) corresponding to the transmission shaft (7) is formed through the rotating shaft (4), and the transmission shaft (7) is movably connected to the rotating shaft (4) through the transmission groove (13).

2. A long-life ball cage type constant velocity universal joint as claimed in claim 1, characterized in that: The rear surface of the rotating shaft (4) is provided with a connection port (5); Wherein, the connection port (5) is fixedly connected to the rear surface of the rotating shaft (4).

3. A long-life ball cage type constant velocity universal joint as claimed in claim 1, characterized in that: The surface of the rotating shaft (4) is provided with four limiting grooves (14) corresponding to the positions of the long rods (6); Wherein, a limiting block (12) is arranged inside each limiting groove (14).

4. A long-life ball cage type constant velocity universal joint as claimed in claim 1, characterized in that: A fixing column (8) is arranged at the front end of the transmission rod (3), and a second groove (15) is formed through the front surface of the fixing column (8); Wherein, the fixed column (8) is movably connected to the rotating shaft (4) through the second groove (15).

5. A long-life ball cage type constant velocity universal joint as claimed in claim 3, characterized in that: The four limit blocks (12) all correspond to the positions of the fixed columns (8), and the front surfaces of the fixed columns (8) are fixedly connected to the rear surfaces of the four long rods (6); The four limit blocks (12) are all fixedly connected to the inner wall of the fixed column (8).

6. A long-life ball cage type constant velocity universal joint as claimed in claim 1, characterized in that: A cleaning ring (11) is fixedly connected to the inner wall of the connecting column (9), and the transmission shaft (7) is located inside the cleaning ring (11).

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