Maintenance-free high-sealing universal joint cross shaft

Abstract

The utility model discloses a maintenance-free high-sealing universal joint cross shaft which comprises a main body, shaft pins are arranged on the periphery of the main body, oil seals and sleeves are arranged outside the shaft pins in a sleeved mode, the same reinforcing rib is arranged in the main body and the shaft pins in a penetrating mode, and transition pipes are arranged in the main body and the shaft pins in a penetrating mode. One side of the main body is provided with a leakage-proof assembly which is in through connection with the transition pipe, a leakage-proof sheet is arranged in the leakage-proof assembly and is used for leakage-proof high sealing of lubricating oil in the universal joint cross shaft, a communicating hole is formed in the transition pipe and is far away from the leakage-proof assembly, and the end part of the reinforcing rib is connected with the transition pipe. A sealing cavity is formed in the end, close to the body, of the leakage-proof assembly in a penetrating mode, and a sealing plug is arranged in the sealing cavity in a sliding mode. According to the universal joint cross shaft, internal lubricating oil can be used in a high-sealing mode, the connecting strength between the cross shaft and a transmission structure is improved, the service life of the universal joint cross shaft is prolonged, and the universal joint cross shaft is free of maintenance.

Description

Technical Field

[0001] The utility model relates to a universal joint, in particular to a maintenance-free and highly sealed universal joint cross shaft. Background Art

[0002] A universal joint cross, also known as a cross shaft or cross shaft, is a key component in automotive or mechanical transmission systems. Its primary function is to transmit power between two shafts at different relative angles. It utilizes the principle of a universal joint and a universal joint housing to achieve this power transfer when the two shaft axes intersect.

[0003] Existing universal joint cross shafts are mostly used in automobile transmission components. When installing the universal joint cross shaft, the two pairs of axle pins of the universal joint cross shaft are passed through the transmission shaft frame. Then, lubricating oil is applied to the bearing sleeve. The bearing sleeve is then passed through the transmission shaft frame and sleeved on the outside of the axle pins. A retaining ring is used to limit and fix it. However, this type of universal joint bearing often experiences high temperatures when used in automobile transmission. The lubricating oil easily flows out of the sleeve, which can easily cause the cross shaft and the transmission shaft frame to become stuck, affecting the sealing between the sleeve and the axle pin, and is not conducive to the long-term use of the universal joint cross shaft. For these reasons, it is necessary to design a universal joint cross shaft that can improve the phenomenon of lubricating oil flowing out of the cross shaft, increase the connection strength between the transmission structure, and be maintenance-free. Utility Model Content

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a maintenance-free and highly sealed universal joint cross shaft, which realizes the highly sealed use of lubricating oil in the universal joint cross shaft and increases the connection strength between the universal joint cross shaft and the transmission structure.

[0005] To achieve the above purpose, the technical solution of this utility model is as follows:

[0006] A maintenance-free, highly sealed universal joint cross shaft comprises a main body, with shaft pins provided on all four sides of the main body, an oil seal and a sleeve provided on the outer sleeve of the shaft pin, a common reinforcing rib provided throughout the interior of the main body and the shaft pin, a transition pipe provided through the main body and the shaft pin, a leak-proof component provided on one side of the main body and connected to the transition pipe, a leak-proof sheet provided in the leak-proof component for leak-proof and highly sealed lubricating oil in the universal joint cross shaft.

[0007] Preferably, the number of the reinforcing ribs is several groups, and the several groups of reinforcing ribs are annularly arranged inside the axle pin.

[0008] Preferably, a connecting hole is provided on the transition pipe, and the connecting hole is arranged away from the leak-proof component, and the end of the reinforcing rib is connected to the transition pipe.

[0009] Preferably, a sealing cavity is provided at one end of the leakage-proof component close to the main body, a sealing plug is slidably provided in the sealing cavity, a dust cover connected to the sealing plug is provided at the outer end of the leakage-proof component, and the leakage-proof sheet is located between the sealing plug and the dust cover.

[0010] Preferably, the sealing cavity is provided with an inwardly contracted end at one end away from the main body, and the inner diameter of the contracted end is smaller than the diameter of the sealing plug.

[0011] Preferably, a spring is fixed on the sealing plug, and a driving rod connected to the dust cover is fixed on the end of the spring.

[0012] Preferably, a support block is provided between the dust cover and the leakage-proof assembly, and an exhaust cavity is formed between the dust cover and the leakage-proof assembly.

[0013] Preferably, a leak-proof hole is provided on the leak-proof sheet, the leak-proof hole is in a fan-shaped shape, and the leak-proof hole is located in the middle of the leak-proof sheet.

[0014] Compared to existing technologies, the maintenance-free, highly sealed universal joint cross shaft provided by this utility model can effectively seal the lubricating oil in the universal joint cross shaft, thereby increasing the connection strength between it and the transmission structure and eliminating maintenance. Specifically, the use of the same reinforcing rib inside the main body and the shaft pin can increase the connection firmness between the main body and the surrounding shaft pins. The connection between the transition tube and the multiple reinforcing ribs prevents the shaft pins from breaking off from the main body and leaking lubricating oil, thereby increasing the stability of the cross shaft structure and reducing the maintenance of the universal joint cross shaft.

[0015] In addition, by using a leak-proof component on one side of the main body and sliding the sealing plug in the sealing cavity, the discharge of gas in the main body and the sealing of the lubricating oil are facilitated, the pressure difference between the main body and the external environment is reduced, the lubricating oil in the main body is avoided from gushing out to the outside, and the jamming phenomenon between the cross shaft and the transmission shaft frame is improved. This is very beneficial for the long-term use of the lubricating oil in the universal joint cross shaft, can extend its service life, and avoid manual maintenance.

[0016] It should be understood that the general description and detailed description herein are exemplary and explanatory only and are not intended to restrict the present disclosure.

[0017] This application document provides various implementations or exemplary overviews of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the maintenance-free and highly sealed universal joint cross shaft of the present invention;

[0019] Figure 2This is a partial structural cross-sectional view of the main body and the shaft pin in the maintenance-free and highly sealed universal joint cross shaft of the present invention;

[0020] Figure 3 This is a schematic structural diagram of multiple reinforcing ribs and transition tubes in the maintenance-free and highly sealed universal joint cross shaft of the present invention;

[0021] Figure 4 This is a partial structural diagram of the main body and the anti-leakage component of the maintenance-free and highly sealed universal joint cross shaft of the present invention;

[0022] Figure 5 This is a partial structural sectional view of the transition assembly and the leak-proof plate in the maintenance-free and highly sealed universal joint cross shaft of the utility model.

[0023] Main reference numerals:

[0024] 11. Main body; 12. Axis pin; 13. Sleeve; 2. Transition pipe; 21. Connecting hole; 3. Reinforcement rib; 4. Leakage-proof assembly; 41. Sealing chamber; 42. Sealing plug; 421. Spring; 422. Drive rod; 43. Dust cover; 431. Support block; 44. Leakage-proof sheet; 441. Leakage-proof hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are described in more detail below in conjunction with the drawings of the embodiments. Note: The described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0026] As attached Figure 1 and attached Figure 2As shown, the embodiment of the present invention provides a maintenance-free, highly sealed universal joint cross shaft, which is used to highly seal the lubricating oil in the universal joint cross shaft and extend the service life of the universal joint. Specifically, the existing universal joint cross shaft has a main body 11, and shaft pins 12 are provided on all four sides of the main body 11. The outer sleeve of the shaft pin 12 is provided with an oil seal and a sleeve 13. The main body 11 and the four shaft pins 12 are a hollow structure connected through, which is convenient for the user to load an appropriate amount of lubricating oil into the universal shaft for use. While lubricating the sleeve 13 and the shaft pin 12, the sleeve 13 and the shaft pin 12 can also be sealed. By providing a reinforcing rib 3 inside the main body 11 and each shaft pin 12, the hardness between the main body 11 and the shaft pin 12 can be increased, avoiding damage to the shaft pin 12 by the connecting end of the sleeve 13, causing the shaft pin 12 to break from the main body 11, and affecting the application of the universal joint cross shaft in power transmission. To facilitate the production and processing of the cross shaft, one end of the reinforcing rib 3 can be fixed to a transition tube 2 disposed within the main body 11. A connecting hole 21 is provided in the transition tube 2 to provide a through-connection within the main body 11. The use of the transition tube 2 facilitates the through-connection between the main body 11 and the multiple axle pins 12, providing a more stable connection between the reinforcing rib 3 and the structure within the main body 11, facilitating the addition of lubricating oil, and increasing the connection strength between the multiple reinforcing ribs 3. Next, a leak-proof assembly 4 is provided on one side of the main body 11, connected to the transition tube 2. A leak-proof sheet 44 is provided within the leak-proof assembly 4, allowing high-pressure gas generated during use of the main body 11 to be discharged through the leak-proof assembly 4 and the leak-proof sheet 44, while also preventing leakage of lubricating oil within the main body 11.

[0027] In some embodiments, in order to better strengthen the high-strength connection between the shaft pin 12 and the main body 11, the reinforcing ribs 3 can be set into several groups, and several groups of reinforcing ribs 3 can be set in a ring shape in the shaft pin 12. By using multiple numbers of reinforcing ribs 3 and the position distribution of the ring shape, it can be ensured that the reinforcing ribs 3 supplement the uniformity of the hardness between the shaft pin 12 and the main body 11, avoid the breakage between the shaft pin 12 and the main body 11, improve the efficient transmission between the universal joint cross shaft and the connecting transmission structure, and reduce the maintenance of the structure.

[0028] Among them, it is worth mentioning that Figure 4 and 5 As shown, a sealing cavity 41 is provided through one end of the leakage-proof component 4 close to the main body 11, and a sealing plug 42 is slidably provided in the sealing cavity 41 for opening or closing the opening of the sealing cavity 41. A dust cover 43 is provided on the outside of the leakage-proof component 4, and then a leakage-proof sheet 44 is provided between the sealing plug 42 and the dust cover 43, so that the lubricating oil in the opened or closed sealing cavity 41 is leak-proof, and external dust is prevented from entering the leakage-proof component 4 and affecting the use of the leakage-proof plug. The open end of the dust cover 43 is sleeved on the outside of the leakage-proof component 4, and a through cavity is formed between the dust cover 43 and the leakage-proof component 4 for the discharge of high-pressure gas in the main body 11.

[0029] In some embodiments, an inwardly retracted end is provided at one end of the sealing cavity 41 away from the main body 11, so that the inner diameter of the retracted end is smaller than the diameter of the sealing plug 42, and the sliding range of the sealing plug 42 is limited, so that the sealing plug 42 can seal the retracted end of the sealing cavity 41 conveniently. In the leakage-proof component 4, it is used for leak-proof treatment of the lubricating oil in the main body 11. When the lubricating oil in the main body 11 presses against the sealing plug 42, the sealing plug 42 will slide to the retracted end, and the retracted end of the sealing cavity 41 is sealed to avoid leakage of the lubricating oil, extend the use time of the lubricating oil in the main body 11, extend the service life of the universal cross shaft, and thus eliminate the maintenance of the universal shaft.

[0030] In some embodiments, the sealing plug 42 is arranged to slide in the sealing cavity 41, such as Figure 5 As shown, this structure can fix a spring 421 on the sealing plug 42, and fix a drive rod 422 connected to the dust cover 43 at the end of the spring 421. The drive rod 422 and the spring 421 are both perpendicular to the sealing plug 42. When the sealing plug 42 is pressed against the lubricating oil, the spring 421 is compressed, pushing the sealing plug 42 to the retracted end of the sealing cavity 41, sealing the sealing cavity 41. When the lubricating oil stops pressing against the sealing plug 42, the spring 421 returns to its original position. The gap between the sealing plug 42 and the retracted end allows the high-pressure gas in the main body 11 to be discharged, completing the sliding of the sealing plug 42. This reduces the air pressure between the main body 11 and the external environment, prevents the lubricating oil from being squeezed out, improves the sealing performance, and enhances the lubrication effect and service life of the universal joint cross shaft.

[0031] It is worth noting that if Figure 4 and 5 As shown, a support block 431 is provided between the dust cover 43 and the leak-proof component 4, so that the dust cover 43 can be suspended in the air, forming an exhaust cavity between the dust cover 43 and the leak-proof component 4 for exhausting gas in the leak-proof component 4. The dust cover 43 is sleeved on one end of the leak-proof component 4, which facilitates the isolation of impurities in the leak-proof component 4 and the sliding use of the sealing plug 42.

[0032] Furthermore, in order to facilitate the isolation of the lubricating oil and the discharge of gas in the leakage-proof component 4, it is necessary to fix the edge of the leakage-proof sheet 44 on the leakage-proof component 4, and open a leakage-proof hole 441 with a fan-shaped ring structure in the middle of the leakage-proof sheet 44, and set the leakage-proof hole 441 in the middle of the leakage-proof sheet 44 to facilitate the overflow of the lubricating oil inside the leakage-proof component 4, improve the leakage-proof effect, and facilitate the discharge of gas in the main body 11, thereby improving the sealing effect of the universal joint cross shaft.

[0033] Of course, the above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A maintenance-free, highly sealed universal joint cross shaft, comprising a main body (11), wherein shaft pins (12) are arranged around the main body (11), and an oil seal and a sleeve (13) are provided on the outside of the shaft pin (12), characterized in that: The main body (11) and the shaft pin (12) are provided with a same reinforcing rib (3) running through the interior thereof; a transition pipe (2) is provided running through the main body (11) and the shaft pin (12); a leak-proof component (4) connected to the transition pipe (2) is provided on one side of the main body (11); a leak-proof sheet (44) is provided in the leak-proof component (4) for leak-proof and high-sealing of lubricating oil in the universal joint cross shaft.

2. The maintenance-free, highly sealed universal joint cross shaft according to claim 1, characterized in that: The number of the reinforcing ribs (3) is several groups, and the several groups of reinforcing ribs (3) are annularly arranged inside the shaft pin (12).

3. The maintenance-free, highly sealed universal joint cross shaft according to claim 1, characterized in that: A communication hole (21) is provided on the transition pipe (2), and the communication hole (21) is arranged away from the leak-proof component (4), and the end of the reinforcing rib (3) is connected to the transition pipe (2).

4. The maintenance-free, highly sealed universal joint cross shaft according to claim 1, characterized in that: A sealing cavity (41) is provided through one end of the leakage-proof component (4) close to the main body (11), a sealing plug (42) is slidably provided in the sealing cavity (41), a dust cover (43) connected to the sealing plug (42) is sleeved on the outer end of the leakage-proof component (4), and the leakage-proof sheet (44) is located between the sealing plug (42) and the dust cover (43).

5. The maintenance-free, highly sealed universal joint cross shaft according to claim 4, characterized in that: An inwardly contracted end is provided at one end of the sealing cavity (41) away from the main body (11), and the inner diameter of the contracted end is smaller than the diameter of the sealing plug (42).

6. The maintenance-free, highly sealed universal joint cross shaft according to claim 5, characterized in that: A spring (421) is fixedly provided on the sealing plug (42), and a driving rod (422) connected to the dust cover (43) is fixedly provided at the end of the spring (421).

7. The maintenance-free, highly sealed universal joint cross shaft according to claim 6, characterized in that: A support block (431) is provided between the dust cover (43) and the leakage prevention assembly (4), and an exhaust cavity is formed between the dust cover (43) and the leakage prevention assembly (4).

8. The maintenance-free, highly sealed universal joint cross shaft according to claim 1, characterized in that: The leak-proof sheet (44) is provided with a leak-proof hole (441), the leak-proof hole (441) is in a fan-shaped shape, and the leak-proof hole (441) is located in the middle of the leak-proof sheet (44).

Images