Three-pin-joint structure and vehicle

Abstract

The three-pin-joint structure comprises a three-pin-joint body and a three-pin-joint idler wheel, the three-pin-joint body comprises a three-pin-joint hub and a hub fork arranged on the three-pin-joint hub, the three-pin-joint idler wheel is arranged on the hub fork in a sleeved mode, an oil storage area is formed between the contact portions of the inner wall of the three-pin-joint idler wheel and the outer wall of the hub fork, and the three-pin-joint idler wheel is arranged in the oil storage area. When the three-pin-joint roller rotates relative to the shaft hub fork, oil in the oil storage area is brought to the contact part of the three-pin-joint main body and the three-pin-joint roller by the inner wall of the three-pin-joint roller, so that the oil in the oil storage area forms a lubricating oil film at the contact part between the shaft hub fork and the three-pin-joint roller, and the lubricating effect is achieved between the three-pin-joint main body and the three-pin-joint roller; therefore, the problem that heat is increased in the friction process due to lack of lubrication in the tripod universal joint is solved, abrasion of the tripod universal joint is reduced, and the service life of the tripod universal joint is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a tripod joint structure and a vehicle. Background Art

[0002] The automobile universal joint is the output end of the vehicle powertrain for transmitting torque. While transmitting torque, it also cooperates with the wheels and other suspension systems to extend and swing. Currently, the inner end of the automobile drive shaft (the end that matches the transmission output power) is a tripod universal joint. However, when the existing tripod universal joint is in operation, it will temporarily lack lubrication inside. Due to the lack of lubrication inside the tripod universal joint, heat will increase during the friction process, which aggravates the wear of the tripod universal joint. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a tripod joint structure and a vehicle to solve the problem that the existing tripod joint lacks lubrication inside and aggravates the wear of the tripod joint.

[0004] Based on the above purpose, the utility model provides a three-pin joint structure, including:

[0005] A tripod main body, comprising a tripod hub and a hub fork arranged on the tripod hub;

[0006] A three-pin joint roller is sleeved on the hub fork, and an oil storage area is formed between the contact portion between the inner wall of the three-pin joint roller and the outer wall of the hub fork. When the three-pin joint roller rotates relative to the hub fork, the oil in the oil storage area forms a lubricating oil film between the hub fork and the three-pin joint roller.

[0007] Optionally, the hub fork is provided with a plurality of oil storage grooves, and the oil storage area is formed between the oil storage grooves and the inner wall of the tripod roller. The plurality of oil storage grooves are arranged at intervals on the side wall of the hub fork, and the hub fork is isolated to form a plurality of pressure-bearing areas, and the pressure-bearing areas are in contact with the inner wall of the tripod roller.

[0008] Optionally, the angle between the center line of the pressure-bearing zone and the center line of the adjacent oil storage tank is less than or equal to 45°.

[0009] Optionally, the angle range between the center lines of adjacent oil storage tanks is less than or equal to 90°.

[0010] Optionally, an oil storage cavity is provided in the hub fork, and a first through hole communicating with the oil storage cavity is provided in the oil storage tank.

[0011] Optionally, an oil storage chamber is provided in the hub fork, a first through hole connected to the oil storage chamber is provided in the oil storage tank, a third through hole connected to the oil storage chamber is provided on the pressure-bearing area, and an oil flow chamber is formed between the oil storage chamber, the first through hole and the third through hole.

[0012] Optionally, a second through hole is provided in the oil storage tank, and a fourth through hole communicating with the second through hole is provided on the pressure-bearing area.

[0013] Optionally, it further includes a movable joint raceway, in which a mounting cavity is provided, a plurality of tracks are provided on the side wall of the mounting cavity, the tripod body is located in the mounting cavity, and a tripod roller is provided in each track.

[0014] Optionally, the tripod roller includes an outer roller ball ring and an inner roller ball ring which are sleeved from outside to inside, the outer wall of the outer roller ball ring is slidably arranged with the track, and the inner wall of the inner roller ball ring contacts the pressure area of ​​the hub fork.

[0015] Based on the same inventive concept, the utility model also provides a vehicle, including the above-mentioned tripod joint structure.

[0016] As can be seen from the above, the utility model provides a tripod structure and a vehicle, the tripod structure comprising: a tripod body and a tripod roller, wherein the tripod body comprises a tripod hub and a hub fork arranged on the tripod hub, the tripod roller is sleeved on the hub fork, an oil storage area is formed between the contact portion between the inner wall of the tripod roller and the outer wall of the hub fork, when the tripod roller rotates relative to the hub fork, the oil in the oil storage area is brought to the contact portion between the tripod body and the tripod roller by the inner wall of the tripod roller, so that the oil in the oil storage area forms a lubricating oil film at the contact portion between the hub fork and the tripod roller, which plays a lubricating role between the tripod body and the tripod roller, thereby solving the problem of increase in heat during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of an exemplary tripod structure of an embodiment of the utility model;

[0019] Figure 2It is a partial cross-sectional schematic diagram of an existing tripod structure of an embodiment of the utility model;

[0020] Figure 3 A partial cross-sectional schematic diagram of a tripod structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the main structure of a tripod joint according to an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the main structure of a tripod joint of another embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the connection structure of the tripod main body and the tripod roller of the embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the hub fork structure of an embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the hub fork structure of another embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram of the hub fork structure of another embodiment of the utility model. Description of the drawings:

[0028] 1. Moving joint raceway; 10. Mounting cavity; 11. Track; 2. Three-pin joint roller; 3. Three-pin joint body; 21. Roller outer ball ring; 22. Roller inner ball ring; 23. Needle roller; 30. Three-pin joint hub; 31. Hub fork; a. Polishing area; b. Oil storage area; 311. Oil storage tank; 312. Pressure-bearing area; 313. Oil storage cavity; 3111. First through hole; 3112. Second through hole; 3121. Third through hole; 3122. Fourth through hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Based on the background technology, the existing tripod universal joint structure is as follows Figure 2 As shown, it includes a hub fork 31 and a three-pin joint roller 2 mounted on the hub fork 31, the three-pin joint roller 2 includes a roller outer ball ring 21 and a roller inner ball ring 22, the inner wall of the roller inner ball ring 22 contacts the outer wall of the hub fork 31, since the hub fork 31 is a spherical surface and the roller inner ball ring 22 is a cylindrical surface, there is an obvious polished area a on the contact surface between the roller inner ball ring 22 and the hub fork 31, when the three-pin joint roller 2 slides on the hub fork 31 at a high frequency, because the fitting clearance between the spherical surface of the hub fork 31 and the roller inner ball ring 22 (that is, the clearance in the polished area a) is small, the grease cannot enter the contact surface with a small fitting clearance under certain working conditions due to its own viscosity, and there is a state of temporary lack of lubrication between the spherical surface of the hub fork 31 and the roller inner ball ring 22, and the roller inner ball ring 22 is in a state of temporary lack of lubrication, and the lack of lubrication will lead to an increase in heat during the friction process, thereby aggravating the wear of the roller inner ball ring 22. Furthermore, due to poor heat dissipation caused by insufficient lubrication between the tripod roller 2 and the hub fork 31, the inner ball ring 22 of the roller presents a high-temperature discoloration area. Through analysis of the polished area a and the high-temperature discoloration area, it is found that the width of the worn bright band is about 1mm-2mm, which further aggravates the wear of the tripod universal joint structure and reduces its service life.

[0032] In order to solve the above technical problems, refer to Figure 1 , Figure 3 and Figure 6 As shown, the utility model provides a three-pin joint structure, including:

[0033] A tripod body 3, comprising a tripod hub 30 and a hub fork 31 arranged on the tripod hub 30;

[0034] The tripod roller 2 is sleeved on the hub fork 31, and an oil storage area b is formed between the inner wall of the tripod roller 2 and the contact portion of the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, the oil in the oil storage area b forms a lubricating oil film between the hub fork 31 and the tripod roller 2.

[0035] Specifically, in this embodiment, Figure 1 and Figure 3 As shown, the tripod structure includes a tripod body 3 and a tripod roller 2. The tripod body 3 includes a tripod hub 30 and a hub fork 31 arranged on the tripod hub 30. The hub fork 31 includes three hub forks 31. The three hub forks 31 are arranged in an array at equal distances on the side wall of the tripod hub 30. The tripod roller 2 is sleeved on the hub fork 31, so that the contact portion between the inner wall of the tripod roller 2 and the outer wall of the hub fork 31 (exemplarily, as shown in FIG. 1 ) is formed. Figure 2 An oil storage area b is formed between the oil storage grooves 311 on the polishing area a), and when the tripod roller 2 rotates relative to the hub fork 31, the oil in the oil storage area b is carried by the inner wall of the tripod roller 2 to the contact portion between the tripod body 3 and the tripod roller 2, and the oil in the oil storage area b forms a lubricating oil film at the contact portion between the hub fork 31 and the tripod roller 2, which lubricates the tripod body 3 and the tripod roller 2, thereby solving the problem of increased heat during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0036] In some embodiments, Figure 4 As shown, in order to achieve a better lubrication effect between the tripod body 3 and the tripod roller 2, a plurality of oil storage grooves 311 are provided on the hub fork 31, and the oil storage area b is formed between the oil storage grooves 311 and the inner wall of the tripod roller 2.

[0037] Specifically, in this embodiment, Figure 1 and Figure 3 As shown, a plurality of oil storage grooves 311 are provided on the side wall of the hub fork 31. Exemplarily, the oil storage grooves 311 may be planes milled on the side wall of the hub fork 31. The plurality of oil storage grooves 311 may include four, and the four oil storage grooves 311 are equidistantly arranged on the side wall of the hub fork 31. The tripod roller 2 is sleeved on the hub fork 31, so that an oil storage area b is formed between the inner wall of the tripod roller 2 and the oil storage grooves 311 on the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, the oil in the oil storage area b is brought by the inner wall of the tripod roller 2 to the contact portion between the tripod body 3 and the tripod roller 2 (for example Figure 2 The polished area a shown in the middle polished area provides better lubrication between the tripod body 3 and the tripod roller 2, thereby reducing the friction between the hub fork 31 and the tripod roller 2.

[0038] In this embodiment, if Figure 4 As shown, a plurality of oil storage grooves 311 are opened on the side wall of the hub fork 31. In order to ensure the stable rotation of the hub fork 31 and the tripod roller 2, the plurality of oil storage grooves 311 are arranged at intervals on the side wall of the hub fork 31, and the hub fork 31 is isolated to form a plurality of pressure-bearing areas 312, and the pressure-bearing areas 312 are in contact with the inner wall of the tripod roller 2.

[0039] Specifically, in the present embodiment, based on the four oil storage tanks 311, four or more oil storage tanks 311 can be provided, which can store more oil between the tripod body 3 and the tripod roller 2, and provide better lubrication between the tripod body 3 and the tripod roller 2. The present embodiment takes the four oil storage tanks 311 as an example, and the four oil storage tanks 311 are arranged at equal intervals on the side wall of the hub fork 31. Due to the existence of the four oil storage tanks 311, the side wall of the hub fork 31 is isolated to form four pressure-bearing areas 312. The four pressure-bearing areas 312 are in contact with the inner wall of the tripod roller 2. The four pressure-bearing areas 312 are used to bear the pressure when the tripod roller 2 rotates. When the tripod roller 2 runs on the hub fork 31, the inner wall of the tripod roller 2 rubs against the pressure-bearing area 312. The pressure-bearing area 312 and the oil storage tank 311 are arranged adjacent to each other. During the rotation of the tripod roller 2, the oil in the oil storage tank 311 can be brought to the pressure-bearing area 312, so that the oil in the oil storage area b forms a lubricating oil film at the contact part between the hub fork 31 and the tripod roller 2, which plays a lubricating role between the tripod body 3 and the tripod roller 2, thereby solving the problem of increased heat during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0040] In some embodiments, Figure 5 As shown, on the basis of the above embodiment, based on 4 or more oil storage tanks 311, illustratively, 4 or more oil storage tanks 311 are spaced apart on the side wall of the hub fork 31, then the angle range between the center line of the pressure zone 312 and the center line of the adjacent oil storage tank 311 is less than or equal to 45°.

[0041] Specifically, in this embodiment, taking four oil storage tanks 311 as an example, the four oil storage tanks 311 are equal in size. In order to ensure the stable rotation of the tripod roller 2 on the hub fork 31, it is necessary to set the four oil storage tanks 311 at equal distances on the side wall of the hub fork 31, and the four divided pressure-bearing areas 312 have equal areas, so the angle range between the center line of the pressure-bearing area 312 and the center line of the adjacent oil storage tank 311 is equal to 45°. Further, taking more than four oil storage tanks 311 as an example, more than four oil storage tanks 311 are set at equal distances on the upper side wall of the hub fork 31, and the divided multiple pressure-bearing areas 312 have equal areas, then the angle range between the center line of the pressure-bearing area 312 and the center line of the adjacent oil storage tank 311 is less than 45°. It is optimal to set four oil storage tanks 311 in the utility model, and the angle range between the center line of the pressure zone 312 and the center line of the adjacent oil storage tank 311 is equal to 45°, that is, a right triangle is formed between the center line of the pressure zone 312 and the center line of the adjacent oil storage tank 311, so that the inner wall of the three-pin joint roller 2 and the contact surface of the pressure zone 312 of the hub fork 31 are evenly stressed, which can ensure the stable rotation of the three-pin joint roller 2 on the hub fork 31.

[0042] In some embodiments, Figure 5 As shown, based on the above embodiment, illustratively, four oil storage grooves 311 are spaced apart on the side wall of the hub fork 31, and the angle range between the center lines of the adjacent oil storage grooves 311 is less than or equal to 90°.

[0043] Specifically, in this embodiment, taking four oil storage tanks 311 as an example, the four oil storage tanks 311 are equal in size. In order to ensure the stable rotation of the tripod roller 2 on the hub fork 31, it is necessary to set the four oil storage tanks 311 at equal distances on the side wall of the hub fork 31, and the four divided pressure-bearing areas 312 have equal areas, so the angle range between the center lines of the adjacent oil storage tanks 311 is equal to 90°. Further, taking more than four oil storage tanks 311 as an example, more than four oil storage tanks 311 are equidistantly set on the upper side wall of the hub fork 31, and the divided multiple pressure-bearing areas 312 have equal areas, then the angle range between the center lines of the adjacent oil storage tanks 311 is less than 90°. It is optimal to set four oil storage tanks 311 in the utility model, and the angular range between the center lines of adjacent oil storage tanks 311 is equal to 90°, that is, an isosceles triangle is formed between the center lines of adjacent oil storage tanks 311, so that the inner wall of the tripod roller 2 and the contact surface of the pressure zone 312 of the hub fork 31 are evenly stressed, which can ensure the stable rotation of the tripod roller 2 on the hub fork 31.

[0044] In some embodiments, Figure 7 and Fig. 9As shown, on the basis of the above embodiments, an oil storage tank 311 is provided to lubricate the tripod roller 2 and the hub fork 31. The more lubricating oil there is, the better the lubrication effect is. Therefore, in this embodiment, an oil storage chamber 313 is provided in the hub fork 31, and a first through hole 3111 communicating with the oil storage chamber 313 is provided in the oil storage tank 311.

[0045] Specifically, for example, an oil storage cavity 313 is provided at the exact center of the hub fork 31, and each oil storage groove 311 is provided with a first through hole 3111 connected to the oil storage cavity 313, and the first through holes 3111 are arranged in an array along the axial direction of the oil storage cavity 313, forming a Figure 7 In another example, an oil storage cavity 313 is provided at the center of the hub fork 31, and each oil storage groove 311 is provided with a plurality of first through holes 3111 connected to the oil storage cavity 313, and the plurality of first through holes 3111 are arranged in an array along the height direction of the oil storage cavity 313, forming a shape as shown in FIG. Fig. 9 The shape shown. When the tripod roller 2 rotates relative to the hub fork 31, in the case of vibration, the oil storage chamber 313 can supply oil to each oil storage tank 311. Or when the tripod roller 2 rotates on the hub fork 31, due to the suction generated during the friction between the edge of the oil storage tank 311 and the inner wall of the tripod roller 2, the oil in the oil storage chamber 313 will be sucked into the oil storage area b, and the oil in the oil storage area b can play a better lubricating role between the tripod body 3 and the tripod roller 2, thereby solving the problem of heat increase during friction due to lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0046] In some embodiments, Figure 8 and Fig. 9 As shown, on the basis of the above-mentioned embodiments, an oil storage tank 311 is provided to lubricate the tripod roller 2 and the hub fork 31. The more lubricating oil there is, the better the lubrication effect is. Therefore, in this embodiment, an oil storage chamber 313 is provided in the hub fork 31, and a first through hole 3111 communicating with the oil storage chamber 313 is provided in the oil storage tank 311, and a third through hole 3121 communicating with the oil storage chamber 313 is provided on the pressure-bearing area 312, and an oil flow cavity is formed between the oil storage chamber 313, the first through hole 3111 and the third through hole 3121.

[0047] Specifically, illustratively, an oil storage chamber 313 is provided at the exact center position inside the hub fork 31, and each oil storage groove 311 is provided with a first through hole 3111 connected to the oil storage chamber 313, and each pressure-bearing area 312 is provided with a third through hole 3121 connected to the oil storage chamber 313, and the first through hole 3111 and the third through hole 3121 are arranged in an array along the axial direction of the oil storage chamber 313, forming a Figure 8In another example, an oil storage cavity 313 is provided at the exact center of the hub fork 31, and each oil storage groove 311 is provided with a plurality of first through holes 3111 communicating with the oil storage cavity 313, and each pressure-bearing area 312 is provided with a plurality of third through holes 3121 communicating with the oil storage cavity 313, and the plurality of first through holes 3111 and the plurality of third through holes 3121 are arranged in an array along the height direction of the oil storage cavity 313, forming a shape as shown in FIG. Fig. 9 The shape shown. Exemplarily, the adjacent first through hole 3111 and the third through hole 3121 are a group, and an oil flow cavity is formed between the oil storage chamber 313, the first through hole 3111 and the third through hole 3121, that is, the oil in the oil storage tank 311 can flow into the oil storage chamber 313 through the first through hole 3111, and the oil in the oil storage chamber 313 can flow to the side wall of the pressure-bearing area 312 through the third through hole 3121, so that the oil flow cavity can be used to supply oil to the pressure-bearing area 312, which can play a better lubrication role between the tripod body 3 and the tripod roller 2. Furthermore, when the tripod roller 2 rotates relative to the hub fork 31, in the case of vibration, the oil storage chamber 313 can supply oil to each oil storage tank 311 through the first through hole 3111, and supply oil to the pressure-bearing area 312 through the third through hole 3121. Or when the tripod roller 2 rotates on the hub fork 31, suction is generated during the friction between the edge of the oil storage groove 311 and the inner wall of the tripod roller 2, and the oil in the oil storage chamber 313 is sucked into the oil storage area b through the first through hole 3111 to supply oil to the oil storage area b. The oil in the oil storage chamber 313 can also be sucked into the pressure-bearing area 312 through the third through hole 3121. The oil in the oil storage chamber 313 and the oil storage area b can provide better lubrication between the tripod body 3 and the tripod roller 2, thereby solving the problem of increased heat during friction due to lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0048] In some embodiments, Figure 8 and Fig. 9 As shown, on the basis of the above-mentioned embodiments, an oil storage tank 311 is provided to lubricate the contact surface between the tripod roller 2 and the hub fork 31, that is, to supply oil to the pressure zone 312 of the hub fork 31. Therefore, in this embodiment, a second through hole 3112 is provided in the oil storage tank 311, and a fourth through hole 3122 connected to the second through hole 3112 is provided on the pressure zone 312.

[0049] Specifically, Figure 8As shown, a plurality of second through holes 3112 are provided in the oil storage tank 311. The second through holes 3112 extend to the end surface of the pressure zone 312 and communicate with the fourth through holes 3122 on the end surface of the pressure zone 312, that is, the second through holes 3112 and the fourth through holes 3122 are communicated. In this way, the oil in the oil storage tank 311 can flow into the end surface of the pressure zone 312 through the second through holes 3112 and the fourth through holes 3122, thereby providing a better lubrication effect between the tripod body 3 and the tripod roller 2. When the tripod roller 2 rotates relative to the hub fork 31, the suction force is generated during the friction between the edge of the oil storage tank 311 and the inner wall of the tripod roller 2, and the oil in the oil storage tank 311 is sucked into the pressure zone 312 through the fourth through holes 3122, and oil is supplied to the pressure zone 312, thereby providing a better lubrication effect between the tripod body 3 and the tripod roller 2. Thereby, the problem of heat increase during friction caused by lack of lubrication in the tripod-type universal joint is solved, the wear of the tripod-type universal joint is reduced, and the service life thereof is increased.

[0050] In some embodiments, Figure 1 and Figure 3 As shown, on the basis of the above-mentioned embodiments, the tripod type universal joint includes an outer universal joint assembly and an inner universal joint assembly, and the outer universal joint assembly and the inner universal joint assembly need to cooperate with each other to realize the action of the universal joint, and the tripod body 3 and the tripod roller 2, that is, the inner universal joint assembly, need the cooperation of the outer universal joint assembly. Therefore, this embodiment also includes a movable joint raceway 1, which is provided with an installation cavity 10, and a plurality of tracks 11 are provided on the side wall of the installation cavity 10, and the tripod body 3 is located in the installation cavity 10, and each of the tracks 11 is provided with a tripod roller 2.

[0051] Specifically, the movable joint raceway 1 is equivalent to the outer universal joint assembly, and the movable joint raceway 1 is a carrier for the operation of the tripod body 3 and the tripod roller 2. A cylindrical mounting cavity 10 is provided in the middle of the movable joint raceway 1, and three tracks 11 are provided around the mounting cavity 10. The tripod body 3 is arranged in the mounting cavity 10, and three shaft hub forks 31 cooperate with the three tracks 11. Since the three tripod rollers 2 are respectively sleeved on the corresponding shaft hubs, the three tripod rollers 2 rotate in the tracks 11 corresponding to the three tracks 11, so that the inner universal joint assembly can be rotated relative to the outer universal joint assembly, and the action of the universal joint can be realized.

[0052] In some embodiments, Figure 3 and Figure 6 As shown, the tripod roller 2 includes an outer roller ball ring 21 and an inner roller ball ring 22 which are sleeved from outside to inside. The outer wall of the outer roller ball ring 21 is slidably arranged with the track 11, and the inner wall of the inner roller ball ring 22 is in contact with the pressure area 312 of the hub fork 31.

[0053] Specifically, the roller outer ball ring 21 and the roller inner ball ring 22 are rotatably arranged, and a needle roller 23 is arranged between the roller outer ball ring 21 and the roller inner ball ring 22, which facilitates the rotation of the roller outer ball ring 21 and the roller inner ball ring 22, reduces the friction of the tripod roller 2, and reduces the friction between the tripod roller 2 and the hub by rotatably arranging the roller outer ball ring 21 and the roller inner ball ring 22. The roller outer ball ring 21 rotates in the track 11, and the roller inner ball ring 22 rotates under the action of the needle roller 23 compared to the roller outer ball ring 21. Under the buffering of the needle roller 23, the roller inner ball ring 22 rotates at a slower speed, which can reduce the wear between the roller inner ball ring 22 and the hub fork 31.

[0054] It should be noted that the embodiments of the present invention can be further described in the following manner:

[0055] Embodiment 1

[0056] The movable joint raceway 1 rotates synchronously with the tripod body 3. During the rotation, the tripod roller 2 rotates relative to the hub fork 31. During the rotation of the tripod roller 2, the roller outer ball ring 21 rotates in the track 11, and the roller inner ball ring 22 rotates under the action of the needle roller 23 compared to the roller outer ball ring 21. Under the buffering of the needle roller 23, the roller inner ball ring 22 rotates slower, which can reduce the wear between the roller inner ball ring 22 and the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, the roller inner ball ring 22 of the tripod roller 2 will bring the oil in the oil storage area b to the end surface of the pressure zone 312, which has a better lubrication effect between the tripod body 3 and the tripod roller 2, thereby solving the problem of heat increase during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0057] Embodiment 2

[0058] The movable joint raceway 1 rotates synchronously with the tripod body 3. During the rotation, the tripod roller 2 rotates relative to the hub fork 31. During the rotation of the tripod roller 2, the roller outer ball ring 21 rotates in the track 11, and the roller inner ball ring 22 rotates relative to the roller outer ball ring 21 under the action of the needle roller 23. Under the buffering of the needle roller 23, the roller inner ball ring 22 rotates slower, which can reduce the wear between the roller inner ball ring 22 and the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, in the case of vibration, the oil storage chamber 313 can supply oil to each oil storage tank 311. Or when the tripod roller 2 rotates on the hub fork 31, suction is generated during the friction between the edge of the oil storage groove 311 and the inner wall of the tripod roller 2, and the oil in the oil storage chamber 313 will be sucked into the oil storage area b, supplying oil to the oil storage area b. The oil in the oil storage area b can play a better lubricating role between the tripod body 3 and the tripod roller 2, thereby solving the problem of increased heat during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0059] Embodiment 3

[0060] The movable joint raceway 1 rotates synchronously with the tripod body 3. During the rotation, the tripod roller 2 rotates relative to the hub fork 31. During the rotation of the tripod roller 2, the roller outer ball ring 21 rotates in the track 11, and the roller inner ball ring 22 rotates compared to the roller outer ball ring 21 under the action of the needle roller 23. Under the buffering of the needle roller 23, the roller inner ball ring 22 rotates slower, which can reduce the wear between the roller inner ball ring 22 and the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, in the case of vibration, the oil storage chamber 313 can supply oil to each oil storage groove 311 through the first through hole 3111, and supply oil to the pressure zone 312 through the third through hole 3121. Or when the tripod roller 2 rotates on the hub fork 31, suction is generated during the friction between the edge of the oil storage groove 311 and the inner wall of the tripod roller 2, and the oil in the oil storage chamber 313 is sucked into the oil storage area b through the first through hole 3111 to supply oil to the oil storage area b. The oil in the oil storage chamber 313 can also be sucked into the pressure-bearing area 312 through the third through hole 3121. The oil in the oil storage chamber 313 and the oil storage area b can provide better lubrication between the tripod body 3 and the tripod roller 2, thereby solving the problem of increased heat during friction due to lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0061] Embodiment 4

[0062] The movable joint raceway 1 rotates synchronously with the tripod body 3. During the rotation, the tripod roller 2 rotates relative to the hub fork 31. During the rotation of the tripod roller 2, the roller outer ball ring 21 rotates in the track 11, and the roller inner ball ring 22 rotates under the action of the needle roller 23 compared to the roller outer ball ring 21. Under the buffering of the needle roller 23, the roller inner ball ring 22 rotates slower, which can reduce the wear between the roller inner ball ring 22 and the hub fork 31. When the tripod roller 2 rotates relative to the hub fork 31, due to the suction generated during the friction between the edge of the oil storage tank 311 and the inner wall of the tripod roller 2, the oil in the oil storage tank 311 will be sucked into the pressure zone 312 through the fourth through hole 3122, and the pressure zone 312 will be supplied with oil, thereby providing better lubrication between the tripod body 3 and the tripod roller 2. Thereby, the problem of heat increase during friction caused by lack of lubrication in the tripod-type universal joint is solved, the wear of the tripod-type universal joint is reduced, and the service life thereof is increased.

[0063] Based on the same inventive concept, the utility model also provides a vehicle, including the above-mentioned tripod joint structure.

[0064] Specifically, the tripod structure includes: a tripod body 3 includes a tripod hub 30 and a hub fork 31 arranged on the tripod hub 30, a plurality of oil storage grooves 311 are opened on the hub fork 31, and the tripod roller 2 is sleeved on the hub fork 31, and an oil storage area b is formed between the inner wall of the tripod roller 2 and the oil storage groove 311. When the tripod roller 2 rotates relative to the hub fork 31, the oil in the oil storage area b is brought to the contact part between the tripod body 3 and the tripod roller 2 by the inner wall of the tripod roller 2, so that the oil in the oil storage area b forms a lubricating oil film at the contact part between the hub fork 31 and the tripod roller 2, which plays a lubricating role between the tripod body 3 and the tripod roller 2, thereby solving the problem of increase in heat during friction caused by lack of lubrication in the tripod universal joint, reducing the wear of the tripod universal joint and increasing its service life.

[0065] It should be noted that some embodiments of the utility model are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0066] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0067] Although the present invention has been described in conjunction with specific embodiments of the present invention, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art based on the foregoing description. For example, other memory architectures may use the discussed embodiments.

[0068] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-pin joint structure, characterized in that: include: A tripod main body (3) comprises a tripod hub (30) and a hub fork (31) arranged on the tripod hub (30); The tripod roller (2) is sleeved on the hub fork (31), and an oil storage area (b) is formed between the contact portion between the inner wall of the tripod roller (2) and the outer wall of the hub fork (31). When the tripod roller (2) rotates relative to the hub fork (31), the oil in the oil storage area (b) forms a lubricating oil film between the hub fork (31) and the tripod roller (2).

2. A tripod joint structure according to claim 1, characterized in that: The hub fork (31) is provided with a plurality of oil storage grooves (311), and the oil storage area (b) is formed between the oil storage grooves (311) and the inner wall of the tripod roller (2). The plurality of oil storage grooves (311) are arranged at intervals on the side wall of the hub fork (31), and the hub fork (31) is isolated to form a plurality of pressure-bearing areas (312), and the pressure-bearing areas (312) are in contact with the inner wall of the tripod roller (2).

3. A tripod joint structure according to claim 2, characterized in that: The angle between the center line of the pressure-bearing area (312) and the center line of the adjacent oil storage tank (311) is less than or equal to 45°.

4. A tripod joint structure according to claim 2, characterized in that: The angle range between the center lines of the adjacent oil storage tanks (311) is less than or equal to 90°.

5. A tripod joint structure according to claim 2, characterized in that: An oil storage chamber (313) is provided in the hub fork (31), and a first through hole (3111) communicating with the oil storage chamber (313) is provided in the oil storage groove (311).

6. A tripod joint structure according to claim 2, characterized in that: An oil storage chamber (313) is provided in the hub fork (31), a first through hole (3111) communicating with the oil storage chamber (313) is provided in the oil storage groove (311), a third through hole (3121) communicating with the oil storage chamber (313) is provided on the pressure-bearing area (312), and an oil flow chamber is formed between the oil storage chamber (313), the first through hole (3111) and the third through hole (3121).

7. A tripod joint structure according to claim 2, characterized in that: A second through hole (3112) is provided in the oil storage tank (311), and a fourth through hole (3122) communicating with the second through hole (3112) is provided on the pressure-bearing area (312).

8. A tripod joint structure according to claim 2, characterized in that: It also includes a movable joint raceway (1) having an installation cavity (10) therein, a plurality of tracks (11) being provided on the side wall of the installation cavity, the tripod body (3) being located in the installation cavity (10), and a tripod roller (2) being provided in each of the tracks (11).

9. A tripod joint structure according to claim 8, characterized in that: The tripod roller (2) comprises an outer roller ball ring (21) and an inner roller ball ring (22) which are sleeved from the outside to the inside, the outer wall of the outer roller ball ring (21) being slidably arranged with the track (11), and the inner wall of the inner roller ball ring (22) being in contact with the pressure-bearing area (312) of the hub fork (31).

10. A vehicle, characterized in that: It comprises a tripod joint structure as described in any one of claims 1-9.

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