A CVT transmission pulley shaft support device

Abstract

The present invention discloses a CVT transmission pulley shaft support device related to the field of transmission technology. It includes a transmission housing, the transmission housing is provided with a pulley shaft, the transmission housing is fixedly connected with a mounting piece, the mounting piece is provided with a mounting housing on a side close to the pulley shaft, a bearing outer ring is slidably connected in the mounting housing, the bearing outer ring is provided with a bearing inner ring, a ring-shaped wedge block is limitedly slidably connected in the bearing inner ring, a ring-shaped spline groove is provided in a position close to the mounting piece on the pulley shaft, and a ring-shaped extrusion block is limitedly slidably connected in the bearing inner ring. The present invention replaces the interference fit between the pulley shaft and the bearing by limiting the wedge block and the adjacent spline groove on the pulley shaft, so as to facilitate the disconnection between the pulley shaft and the bearing, and reduce the probability of damage to the pulley shaft when the pulley shaft and the bearing are separated.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and in particular to a CVT transmission pulley shaft supporting device. Background Art

[0002] The CVT transmission is an automatic transmission that can continuously change the transmission ratio within a certain range. The pulley shaft and the transmission housing inside it are rotationally connected. In order to reduce the friction between the pulley shaft and the transmission, a bearing needs to be installed between the two. At the same time, in order to prevent relative rotation between the pulley shaft and the inner ring of the bearing, the inner ring of the bearing and the pulley shaft are usually set to an interference fit. Therefore, before installing the bearing to the pulley shaft, the inner ring of the bearing needs to be heated, and the end of the pulley shaft to be installed with the bearing needs to be cooled, and the two are installed in place using the principle of thermal expansion and contraction. However, when the pulley shaft and the bearing need to be repaired or replaced, it is difficult to separate the bearing from the pulley shaft. Usually, a rubber hammer is needed to forcibly separate the inner ring of the bearing from the pulley shaft, but this method is likely to cause damage to the pulley shaft. Summary of the invention

[0003] The invention provides a CVT transmission pulley shaft supporting device to overcome the disadvantage that the existing bearing and the pulley shaft are difficult to separate.

[0004] The technical solution is: a CVT transmission pulley shaft support device, including a transmission housing, the transmission housing is provided with a pulley shaft, the transmission housing is fixedly connected with a mounting piece, a mounting housing is provided on the side of the mounting piece close to the pulley shaft, a bearing outer ring is slidably connected in the mounting housing, a bearing inner ring is provided on the bearing outer ring, an annularly distributed roller is provided between the bearing inner ring and the bearing outer ring, an annularly distributed wedge block is limitedly slidably connected in the bearing inner ring, and a spring is fixedly connected between the two, the pulley shaft is close to the mounting housing The position of the part is provided with an annularly distributed spline groove, the wedge block is limitedly matched with the adjacent spline groove, the inner ring of the bearing is limitedly slidably connected with an annularly distributed extrusion block, a tension spring is fixedly connected between the side of the extrusion block close to the pulley shaft and the inner ring of the bearing, the extrusion block is extruded and matched with the adjacent wedge block, the side of the inner ring of the bearing close to the pulley shaft is limitedly slidably connected with a synchronous part, the synchronous part is extruded and matched with the pulley shaft, the annularly distributed extrusion blocks are all limitedly slidably connected with the synchronous part, and a spring is fixedly connected between the two.

[0005] Furthermore, the angle between the contact surface of the wedge block and the adjacent extrusion block and the central axis of the bearing inner ring is between 10° and 15°, which is used to reduce the reaction force of the wedge block on the extrusion block in the direction of the central axis of the bearing inner ring.

[0006] Furthermore, the mounting housing is provided with annularly distributed limiting grooves at positions close to the synchronizer, and the limiting grooves are limitedly matched with the synchronizer.

[0007] Furthermore, a ring-distributed connecting piece is fixedly connected to one side of the synchronizer close to the transmission housing, and the connecting piece is rotatably connected to a limiting piece away from the synchronizer, and a torsion spring is fixedly connected between the limiting piece and the adjacent connecting piece, and both the connecting piece and the limiting piece are slidably connected to the inner ring of the bearing, and the limiting piece is squeezed fit with the inner ring of the bearing.

[0008] Furthermore, in the direction of the rotation axis of the limiting member, the maximum width of the limiting member is greater than the maximum width of the adjacent connecting member, so as to limit the adjacent connecting member.

[0009] Furthermore, the installation shell is limitedly slidably connected with annularly distributed fixing parts at a position away from the pulley shaft, a spring is fixedly connected between the fixing parts and the installation shell, and the fixing parts are limitedly matched with the outer ring of the bearing.

[0010] Furthermore, the fixing member is provided with a first inclined surface at a position close to the central axis of the mounting shell and away from the pulley shaft, the fixing member is provided with a second inclined surface at a position close to the central axis of the mounting shell and close to the pulley shaft, the outer ring of the bearing is provided with a symmetrically distributed third inclined surface, the first inclined surface and the adjacent second inclined surface are respectively pressed and fitted with the symmetrically distributed third inclined surface, in the direction of the central axis of the fixing member, the sum of the height of adjacent first inclined surfaces and the height of the third inclined surface is greater than the maximum distance between adjacent fixing members and the mounting shell, and the sum of the height of adjacent second inclined surfaces and adjacent third inclined surfaces is less than the maximum distance between adjacent fixing members and the mounting shell.

[0011] Furthermore, the mounting piece is provided with annularly distributed threaded holes on one side close to the transmission housing, the mounting piece is provided with a truncated cone portion at positions close to the threaded holes, the transmission housing is provided with a through hole at positions close to the threaded holes, the through hole of the transmission housing is arranged in a shape corresponding to the truncated cone portion on one side close to the mounting piece, and the truncated cone portion is used to facilitate the correspondence of adjacent threaded holes with adjacent through holes on the transmission housing.

[0012] Furthermore, it also includes a sealing ring, which is fixedly connected to a side of the mounting piece close to the pulley shaft, the mounting piece is sealingly and slidably connected to the mounting shell, the mounting shell is provided with a limited position cavity, damping fluid is stored in the limited position cavity, the sealing ring seals and slides in the limited position cavity, a spring is fixedly connected between the side of the sealing ring away from the mounting piece and the mounting shell, the mounting piece is rotatably connected with a rotating ring close to the sealing ring, the sealing ring and the rotating ring are both provided with annularly distributed through holes, the through holes of the sealing ring are sealed and matched with the rotating ring, the through holes of the rotating ring are connected and matched with adjacent through holes on the sealing ring, the rotating ring is sealingly and rotatably connected with the sealing ring, a push rod is slidably connected to a position of the mounting piece close to the threaded hole on one side, a spring is fixedly connected between the side of the push rod close to the sealing ring and the mounting piece, and an elastic rod is fixedly connected to the side of the push rod close to the sealing ring, the elastic rod passes through the mounting piece and is fixedly connected to the rotating ring.

[0013] Furthermore, the elastic rod is provided with a bending portion, and the angle of the bending portion is between 30° and 45°.

[0014] The present invention discloses the following technical effects: the present invention provides equal circumferential supporting force to the pulley shaft through the limiting cooperation between the wedge block and the adjacent spline groove on the pulley shaft, thereby replacing the interference fit between the pulley shaft and the bearing. When the pulley shaft needs to be repaired, it is convenient to disconnect the pulley shaft from the bearing, thereby reducing the probability of damage to the pulley shaft when the pulley shaft is separated from the bearing.

[0015] By limiting the adjacent connecting parts using the limit piece, the synchronizer loses its reaction force to the right on the pulley shaft, preventing the pulley shaft from moving right under the action of the adjacent spring of the synchronizer when other parts in the transmission housing are subsequently installed, thus affecting the installation of workers. At the same time, under the action of the adjacent spring of the synchronizer, the extrusion block maintains a tendency to move left, that is, the wedge block is kept in contact with the adjacent spline groove, so that after the pulley shaft is worn during operation, the annularly distributed wedge blocks can still provide equal circumferential support force to the pulley shaft.

[0016] By changing the distance between the mounting part and the mounting housing and using the flow of damping fluid to lock the relative position of the mounting part and the mounting housing, there is no need to find a suitable gasket again after the transmission is worn or repaired, thus saving workers' maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting member, the mounting housing and the bearing outer ring of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the installation housing, the bearing outer ring and the bearing inner ring of the present invention;

[0020] Figure 4 It is a three-dimensional structural cross-sectional view of the inner ring, wedge block and extrusion block of the bearing of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the inner ring, the connecting member and the limiting member of the bearing of the present invention;

[0022] Figure 6 The present invention is attached Figure 4 The enlarged view of point A in the middle;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the transmission housing, mounting parts and threaded holes of the present invention;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the mounting member, the mounting housing and the blocking ring of the present invention;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the sealing ring, the rotating ring and the push rod of the present invention;

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the threaded hole, the push rod and the elastic rod of the present invention.

[0027] Figure numbers: 1-transmission housing, 101-pulley shaft, 2-mounting part, 3-mounting housing, 4-bearing outer ring, 5-bearing inner ring, 501-roller, 6-wedge block, 601-spline groove, 7-extrusion block, 8-synchronizing part, 801-limiting groove, 9-connecting part, 10-limiting part, 11-fixing part, 111-first inclined surface, 112-second inclined surface, 113-third inclined surface, 12-threaded hole, 121-cone part, 13-sealing ring, 131-limiting cavity, 14-rotating ring, 15-push rod, 16-elastic rod. DETAILED DESCRIPTION

[0028] The following will be combined with the attached Figure 1 To Attachment Fig.10 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] When installing the pulley shaft of the transmission, it is necessary to heat the inner ring of the bearing and freeze one end of the pulley shaft. The bearing sleeve is installed on one end of the pulley shaft using the principle of thermal expansion and contraction to create an interference fit between the two. However, this method makes it difficult to separate the bearing from the pulley shaft when the bearing or pulley shaft is damaged and needs to be replaced, and the surface of the pulley shaft is easily damaged during separation.

[0030] Example 1: A CVT transmission pulley shaft support device, please refer to Figure 1-Figure 4 , including a transmission housing 1 (only a part of the transmission structure is shown in the figure), a pulley shaft 101 is arranged on the right side of the transmission housing 1, a shaft shoulder is arranged on the left side of the pulley shaft 101, a mounting member 2 is fixedly connected to the transmission housing 1, a mounting housing 3 is arranged on the right side of the mounting member 2, a bearing outer ring 4 is slidably connected in the mounting housing 3, a bearing inner ring 5 is arranged in the middle of the bearing outer ring 4, and annularly distributed rollers 501 are arranged between the bearing inner ring 5 and the bearing outer ring 4 (the annularly distributed rollers 501 are connected by the existing structure The bearing body is composed of a bearing outer ring 4, a bearing inner ring 5 and an annularly distributed rollers 501. The bearing inner ring 5 is limitedly slidably connected with a plurality of annularly distributed wedge blocks 6, and a spring is fixedly connected between the two. The spring is used to reset the wedge blocks 6. The left part of the pulley shaft 101 is provided with a plurality of annularly distributed spline grooves 601. The number of the wedge blocks 6 is equal to that of the spline grooves 601. The wedge blocks 6 are limitedly matched with the adjacent spline grooves 601. Through the cooperation between the two, the bearing inner ring 5 can be driven when the pulley shaft 101 rotates. The inner ring 5 of the bearing is provided with a plurality of extrusion blocks 7 which are distributed in an annular manner and the number of the extrusion blocks 7 and the wedge blocks 6 is equal. A tension spring is fixedly connected between the right side of the extrusion block 7 and the inner ring 5 of the bearing. The tension spring is used to reset the extrusion block 7. The extrusion block 7 is extruded and matched with the adjacent wedge blocks 6. The side of the extrusion block 7 close to the central axis of the inner ring 5 of the bearing and the side of the wedge blocks 6 away from the central axis of the inner ring 5 of the bearing are both inclined surfaces, and the above-mentioned inclined surfaces are clamped relative to the central axis of the inner ring 5 of the bearing. The angle is between 10° and 15°, which is used to reduce the reaction force of the wedge block 6 on the extrusion block 7 in the direction of the central axis of the bearing inner ring 5. When the extrusion block 7 moves to the left, the inclined surface of the extrusion block 7 squeezes the adjacent wedge block 6 toward the direction of the central axis of the bearing inner ring 5. The right side of the bearing inner ring 5 is limitedly slidably connected with a synchronous member 8, and the synchronous member 8 is extruded and matched with the shoulder of the pulley shaft 101. The annularly distributed extrusion blocks 7 are all limitedly slidably connected with the synchronous member 8, and a spring is fixed between the synchronous member 8 and the left side inside the extrusion block 7.

[0031] Please refer to Figure 4 The right part of the mounting housing 3 is provided with a plurality of limiting grooves 801 distributed in an annular manner. The limiting grooves 801 cooperate with the synchronous member 8 to limit the bearing inner ring 5 relative to the mounting housing 3 when the pulley shaft 101 is installed, so that the wedge block 6 is easily aligned with the adjacent spline groove 601.

[0032] Please refer to Figure 4 and Figure 5 The left side of the synchronizer 8 is fixedly connected with three connecting members 9 distributed in an annular manner. The left part of the connecting member 9 is rotatably connected with a limiting member 10. The limiting member 10 is composed of a missing cylinder and a limiting column, and the maximum distance between the limiting column and the rotation axis of the limiting member 10 is equal to the radius of the missing cylinder of the limiting member 10. An initial force-storing torsion spring is fixedly connected between the limiting member 10 and the adjacent connecting member 9. The connecting member 9 and the limiting member 10 are both slidably connected with the inner ring 5 of the bearing. The limiting member 10 is extruded and fitted with the inner ring 5 of the bearing. After the limiting member 10 protrudes out of the inner ring 5 of the bearing, the limiting member 10 rotates 90° relative to the connecting member 9 under the action of the adjacent torsion spring, so that the limiting column of the limiting member 10 contacts the inner ring 5 of the bearing, limits the adjacent connecting member 9, and prevents the adjacent connecting member 9 from moving to the right. In the direction of the rotation axis of the limiting member 10, the maximum width of the limiting member 10 is greater than the maximum width of the adjacent connecting member 9, which is used to limit the adjacent connecting member 9.

[0033] Please refer to Figure 3 , Figure 4 and Figure 6 The left part of the mounting shell 3 is limitedly slidably connected with three annularly distributed fixing parts 11, and a spring is fixedly connected between the fixing part 11 and the upper side inside the mounting shell 3. The spring is used to keep the fixing part 11 protruding out of the mounting shell 3. The fixing part 11 is limitedly matched with the bearing outer ring 4 to quickly fix and disassemble the bearing outer ring 4.

[0034] Please refer to Figure 4 and Figure 6 A first inclined surface 111 is provided on the left side of the fixing member 11 close to the central axis of the mounting shell 3, and a second inclined surface 112 is provided on the right side of the fixing member 11 close to the central axis of the mounting shell 3. The bearing outer ring 4 is provided with two third inclined surfaces 113 symmetrically distributed on the left and right. The first inclined surface 111 is pressed and matched with the third inclined surface 113 on the right side, and the second inclined surface 112 is pressed and matched with the third inclined surface 113 on the left side. In the direction of the central axis of the fixing member 11, the sum of the heights of adjacent first inclined surfaces 111 and the third inclined surfaces 113 is greater than the maximum distance between adjacent fixing members 11 and the mounting shell 3, which is convenient for installing the bearing outer ring 4 into the mounting shell 3, and the sum of the heights of adjacent second inclined surfaces 112 and adjacent third inclined surfaces 113 is less than the maximum distance between adjacent fixing members 11 and the mounting shell 3, which is used to make the vertical surface of the fixing member 11 contact with the vertical surface of the bearing outer ring 4 after the bearing outer ring 4 is installed in place, so as to limit the bearing outer ring 4.

[0035] Please refer to Figure 2 and Figure 7Three threaded holes 12 distributed in an annular pattern are arranged on the left side of the mounting member 2, and a truncated cone portion 121 is arranged near the threaded holes 12 of the mounting member 2, and a through hole is arranged near the threaded holes 12 of the transmission housing 1, and the right part of the through hole on the transmission housing 1 matches the shape of the truncated cone portion 121, and the truncated cone portion 121 is used to facilitate the correspondence of adjacent threaded holes 12 with adjacent through holes on the transmission.

[0036] When the pulley shaft 101 needs to be installed in the transmission housing 1, the worker fits the mounting member 2 and the mounting housing 3 and their internal parts with the corresponding positions of the transmission housing 1, and then the worker rotates the mounting member 2 and the mounting housing 3, and pushes the mounting member 2 and the mounting housing 3 to the left while rotating. As the mounting member 2 rotates, the mounting member 2 drives the three threaded holes 12 thereon to rotate. When the threaded holes 12 correspond to the adjacent through holes on the transmission housing 1, the mounting member 2 continues to move left by the length of a conical portion 121. At this time, the worker stops rotating the mounting housing 3, and uses bolts to pass through the three through holes on the transmission housing 1, so that the bolts are threadably matched with the adjacent threaded holes 12, and the mounting member 2 is installed on the transmission housing 1.

[0037] After installing the mounting member 2 on the transmission housing 1, the worker moves the pulley shaft 101 to the left along the central axis of the bearing inner ring 5, so that the several spline grooves 601 on the pulley shaft 101 all enter the bearing inner ring 5. At the same time, the shoulder of the pulley shaft 101 contacts the synchronizer 8 and pushes the synchronizer 8 to move to the left along the adjacent limit groove 801. The synchronizer 8 pushes the several extrusion blocks 7 through the spring between it and the adjacent extrusion block 7 (hereinafter referred to as the spring adjacent to the synchronizer 8), so that the several extrusion blocks 7 have a tendency to move to the left. The extrusion block 7 has a tendency to squeeze the adjacent wedge block 6 to move in the direction close to the central axis of the bearing inner ring 5, but at this time, since the wedge block 6 is not in contact with the corresponding The adjacent spline groove 601 corresponds to the wedge block 6, that is, the wedge block 6 cannot move. At this time, the worker feels the resistance of the pulley shaft 101 pushing to the left. The worker rotates the pulley shaft 101 and maintains the force to push the pulley shaft 101 to the left. As the pulley shaft 101 rotates, the several spline grooves 601 on the pulley shaft 101 correspond to the adjacent wedge blocks 6 respectively. At this time, the wedge block 6 moves toward the direction close to the central axis of the bearing inner ring 5 under the push of the adjacent extrusion block 7, and compresses the spring adjacent to the wedge block 6, so that the wedge block 6 enters the adjacent spline groove 601 and limits the pulley shaft 101. At this time, the worker stops rotating the pulley shaft 101 and continues to push the pulley shaft 101 to the left.

[0038] As the pulley shaft 101 moves to the left, the shoulder of the pulley shaft 101 continues to push the synchronous member 8 to move, and the synchronous member 8 pushes the several extrusion blocks 7 to move until the wedge block 6 contacts the bottom of the adjacent spline groove 601, and the wedge block 6 and the adjacent extrusion block 7 stop moving. As the synchronous member 8 continues to move to the left, the synchronous member 8 moves left relative to the several extrusion blocks 7 and compresses the spring adjacent to the synchronous member 8 until the right part of the synchronous member 8 contacts the bearing inner ring 5, and the synchronous member 8 loses contact with the adjacent limiting groove 801, releasing the limiting of the adjacent bearing inner ring 5 by the synchronous member 8 (at this time the bearing inner ring 5 can rotate relative to the mounting member 2). At the same time, the shoulder of the pulley shaft 101 contacts the right side of the bearing inner ring 5, and the worker stops pushing the pulley shaft 101.

[0039] When the synchronizer 8 moves to the left, the synchronizer 8 drives the three connecting members 9 to move to the left, and the connecting member 9 drives the adjacent limiting member 10 to move to the left. When the shoulder of the pulley shaft 101 contacts the right side of the bearing inner ring 5, the connecting member 9 drives the adjacent limiting member 10 to extend out of the bearing inner ring 5 and stop moving. The limiting member 10 rotates 90° under the action of its adjacent torsion spring, so that the limiting column of the limiting member 10 contacts the bearing inner ring 5, and the adjacent connecting member 9 is limited. The limiting member 10 limits the adjacent connecting member 9, so that the synchronizer 8 loses its reaction force to the right on the pulley shaft 101, preventing the transmission housing 1 from being installed later. When installing other parts, the pulley shaft 101 moves to the right under the action of the adjacent spring of the synchronizer 8, which affects the workers' installation. At the same time, the extrusion block 7 keeps moving to the left under the action of the adjacent spring of the synchronizer 8, that is, the wedge block 6 is kept in contact with the bottom of the adjacent spline groove 601. Then the workers complete the installation of the pulley shaft 101. When the pulley shaft 101 rotates, the pulley shaft 101 cooperates with the adjacent wedge block 6 through the spline groove 601 to drive the bearing inner ring 5 to rotate, and a number of rollers 501 between the bearing inner ring 5 and the bearing outer ring 4 are used to provide support for the pulley shaft 101 and reduce the resistance to the rotation of the pulley shaft 101.

[0040] When the pulley shaft 101 needs to be repaired, the worker loosens the three bolts corresponding to the threaded holes 12 on the transmission housing 1, and then removes the pulley shaft 101, the mounting part 2, the mounting housing 3 and all the parts therein from the transmission housing 1. The worker then moves the pulley shaft 101 to the right relative to the bearing inner ring 5, so that the spline groove 601 gradually loses contact with the adjacent wedge block 6, so that the wedge block 6 releases the limit on the pulley shaft 101, until the pulley shaft 101 loses contact with the bearing inner ring 5, and then the worker repairs the pulley shaft 101.

[0041] When the bearing outer ring 4 and its inner parts need to be replaced, the worker moves the three fixing parts 11 away from the central axis of the mounting shell 3 and compresses the springs adjacent to the fixing parts 11 to release the limiting effect of the fixing parts 11 on the bearing outer ring 4. At this time, the worker takes the bearing outer ring 4 and all its inner parts out of the mounting shell 3. The fixing part 11 moves toward the central axis of the mounting shell 3 and resets under the action of its adjacent springs. Then the worker replaces the bearing outer ring 4 or its inner parts.

[0042] After replacing the bearing outer ring 4 or its inner parts, the worker moves the bearing outer ring 4 and its inner parts to the right along the central axis of the mounting shell 3, so that the third inclined surface 113 on the right side of the bearing outer ring 4 contacts the three first inclined surfaces 111, and squeezes the three first inclined surfaces 111 in the direction away from the central axis of the mounting shell 3, compressing the spring adjacent to the fixing member 11. As the bearing outer ring 4 moves to the right, when the bearing outer ring 4 is reset, the left side of the bearing outer ring 4 contacts the right side of the three fixing members 11. The fixing member 11 is reset under the action of its adjacent springs and limits the bearing outer ring 4. If the bearing outer ring 4 is not completely reset, the third inclined surface 113 on the left side of the bearing outer ring 4 contacts the three second inclined surfaces 112. The worker pushes the three fixing members 11 in turn in the direction close to the central axis of the mounting shell 3 to reset the three fixing members 11. In the process of the worker pushing the fixing member 11 to move, the second inclined surface 112 of the fixing member 11 squeezes the third inclined surface 113 on the left side of the bearing outer ring 4, and squeezes the bearing outer ring 4 to the right to reset the bearing outer ring 4.

[0043] After the bearing outer ring 4 is reset, the worker rotates the three limit members 10 to reset the limit members 10 relative to the adjacent connecting member 9. Then the connecting member 9 moves to the right under the action of the adjacent spring of the synchronous member 8. The connecting member 9 drives the adjacent limit members 10 to retract into the bearing inner ring 5. Then the extrusion block 7 moves to the right and resets under the action of its adjacent tension spring. When the extrusion block 7 moves to the right, the extrusion block 7 drives the synchronous member 8 to move to the right and reset through the adjacent spring of the synchronous member 8, so that the synchronous member 8 contacts the adjacent limit groove 801 and slides along it. At the same time, the wedge block 6 moves and resets in the direction away from the central axis of the bearing inner ring 5 under the action of its adjacent spring. Then the worker repairs or replaces the damaged parts and repeats the above steps to install the pulley shaft 101 on the transmission housing 1.

[0044] Only in this embodiment, the installation member 2 and the installation housing 3 are arranged in a fixed connection relationship. In subsequent embodiments, the installation member 2 and the installation housing 3 are arranged in a sealed sliding connection relationship.

[0045] When installing the pulley shaft and bearing on the transmission, in order to adjust the gap between the bearing and the transmission, a gasket needs to be placed between the bearing and the transmission. However, due to wear and maintenance of the transmission during use, the gap between the bearing and the transmission changes. At this time, it is necessary to remeasure and calculate the gap between the two and select a suitable gasket. However, this method wastes time and the wear thickness is uncertain, which makes it difficult for the gasket thickness to be completely consistent with the gap between the bearing and the transmission.

[0046] Example 2: Based on Example 1, please refer to Figure 7-Figure 10 , also includes a blocking ring 13, the blocking ring 13 is fixedly connected to the right side of the mounting member 2, the mounting member 2 is sealingly and slidably connected to the mounting shell 3, the mounting shell 3 is provided with a limit cavity 131, the limit cavity 131 contains damping fluid, the blocking ring 13 is sealed and slidable in the limit cavity 131, the through hole of the blocking ring 13 is for the damping fluid in the limit cavity 131 to flow, a spring is fixedly connected between the right side of the blocking ring 13 and the mounting shell 3, the right part of the mounting member 2 is limitedly rotatably connected with a rotating ring 14, the blocking ring 13 and the rotating ring 14 are both provided with annularly distributed through holes, the through holes of the blocking ring 13 and the rotating ring 14 are sealed with each other The through hole of the sealing ring 13 is connected and matched with the adjacent through hole on the rotating ring 14, and initially, the through hole of the sealing ring 13 is connected with the adjacent through hole on the rotating ring 14, and the rotating ring 14 is sealed and rotatably connected with the sealing ring 13. A push rod 15 is slidably connected to the lower left part of the mounting member 2, and a spring is fixedly connected between the right side of the push rod 15 and the mounting member 2. An elastic rod 16 is fixedly connected to the right side of the push rod 15, and the elastic rod 16 passes through the mounting member 2 and is fixedly connected to the rotating ring 14. A bending portion is provided in the middle of the elastic rod 16, and the angle of the bending portion is between 30° and 45°, so that the elastic rod 16 can push the rotating ring 14 to rotate.

[0047] When the worker installs the mounting member 2 on the transmission housing 1, the worker connects the two through holes on the top of the transmission housing 1 with the adjacent threaded holes 12 by bolts, installs the mounting member 2 on the transmission housing 1, and repeats the steps of installing the pulley shaft 101 on the transmission housing 1 in Example 1, and then installs the other parts in the transmission as a whole in place. During this process, the other parts in the transmission as a whole squeeze the pulley shaft 101 to the left, and the pulley shaft 101 squeezes the bearing inner ring 5 through its shoulder. The bearing inner ring 5 drives the mounting housing 3 and the bearing outer ring 4 to move left through the roller 501, so that the mounting housing 3 moves left relative to the mounting member 2, and compresses the spring adjacent to the sealing ring 13. After all the parts in the transmission as a whole are installed in place, the squeezing of the pulley shaft 101 is stopped, and the mounting housing 3 stops moving. The distance between the mounting housing 3 and the mounting member 2 is the required thickness of the gasket.

[0048] During the process of the installation housing 3 moving left relative to the installation part 2, the installation housing 3 drives the damping fluid in the limit cavity 131 to flow through the through holes on the rotating ring 14 and the sealing ring 13. Then, when the installation housing 3 stops moving, that is, after all the parts in the transmission housing 1 are installed in place, the worker uses a bolt to pass through the through hole below the transmission housing 1 and enter the adjacent threaded hole 12. During this process, the bolt pushes the push rod 15 to the right and compresses the spring adjacent to the push rod 15. The push rod 15 pushes the rotating ring 14 to rotate through the elastic rod 16, so that the rotating ring 14 blocks the through hole on the sealing ring 13. At this time, the damping fluid in the limit cavity 131 is separated by the sealing ring 13 and the rotating ring 14, so that the installation housing 3 cannot move relative to the installation part 2. There is no need to re-match the appropriate gasket, which reduces the working time of the workers and improves the work efficiency.

[0049] When the mounting member 2 is removed, the bolts adjacent to the lower threaded hole 12 lose their squeezing force on the push rod 15, so that the push rod 15 drives the elastic rod 16 to move leftward under the action of the adjacent spring, and the elastic rod 16 drives the rotating ring 14 to rotate in the opposite direction and reset, and the rotating ring 14 releases the blockage of the through hole of the blocking ring 13.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A CVT transmission pulley shaft support device, comprising a transmission housing (1), wherein the transmission housing (1) is provided with a pulley shaft (101), characterized in that: The transmission case (1) further comprises a mounting member (2), wherein the mounting member (2) is fixedly connected to the transmission case (1), a mounting housing (3) is provided on a side of the mounting member (2) close to the pulley shaft (101), a bearing outer ring (4) is slidably connected inside the mounting housing (3), a bearing inner ring (5) is provided on the bearing outer ring (4), an annularly distributed roller (501) is provided between the bearing inner ring (5) and the bearing outer ring (4), an annularly distributed wedge block (6) is limitedly slidably connected inside the bearing inner ring (5), and a spring is fixedly connected between the two, and an annularly distributed spline groove (601) is provided at a position of the pulley shaft (101) close to the mounting member (2). , the wedge block (6) is limitedly matched with the adjacent spline groove (601), the inner ring of the bearing (5) is limitedly slidably connected with an annularly distributed extrusion block (7), a tension spring is fixedly connected between the side of the extrusion block (7) close to the pulley shaft (101) and the bearing inner ring (5), the extrusion block (7) is extruded and matched with the adjacent wedge block (6), the side of the bearing inner ring (5) close to the pulley shaft (101) is limitedly slidably connected with a synchronous member (8), the synchronous member (8) is extruded and matched with the pulley shaft (101), the annularly distributed extrusion blocks (7) are all limitedly slidably connected with the synchronous member (8), and a spring is fixedly connected between the two; The mounting housing (3) is provided with an annularly distributed limiting groove (801) at a position close to the synchronizing member (8), the limiting groove (801) being in limiting cooperation with the synchronizing member (8); A connecting member (9) distributed in an annular manner is fixedly connected to one side of the synchronizer (8) close to the transmission housing (1); the connecting member (9) is rotatably connected to a limiting member (10) at a position away from the synchronizer (8); a torsion spring is fixedly connected between the limiting member (10) and the adjacent connecting member (9); the connecting member (9) and the limiting member (10) are both slidably connected to the bearing inner ring (5); and the limiting member (10) is press-fitted with the bearing inner ring (5); In the direction of the rotation axis of the limiting member (10), the maximum width of the limiting member (10) is greater than the maximum width of the adjacent connecting member (9), and is used to limit the adjacent connecting member (9).

2. A CVT transmission pulley shaft support device according to claim 1, characterized in that: The angle between the contact surface of the wedge block (6) and the adjacent extrusion block (7) relative to the central axis of the bearing inner ring (5) is between 10° and 15°, so as to reduce the reaction force of the wedge block (6) on the extrusion block (7) in the direction of the central axis of the bearing inner ring (5).

3. A CVT transmission pulley shaft support device according to claim 1, characterized in that: The mounting housing (3) is slidably connected to a position away from the pulley shaft (101) with an annularly distributed fixing member (11), a spring is fixedly connected between the fixing member (11) and the mounting housing (3), and the fixing member (11) is limitedly matched with the bearing outer ring (4).

4. A CVT transmission pulley shaft support device according to claim 3, characterized in that: The fixing member (11) is provided with a first inclined surface (111) at a position close to the central axis of the mounting shell (3) and away from the pulley shaft (101); the fixing member (11) is provided with a second inclined surface (112) at a position close to the central axis of the mounting shell (3) and close to the pulley shaft (101); the bearing outer ring (4) is provided with a symmetrically distributed third inclined surface (113); the first inclined surface (111) and the adjacent second inclined surface (112) are respectively pressed and matched with the symmetrically distributed third inclined surface (113); in the direction of the central axis of the fixing member (11), the sum of the heights of adjacent first inclined surfaces (111) and the third inclined surfaces (113) is greater than the maximum distance between adjacent fixing members (11) and the mounting shell (3), and the sum of the heights of adjacent second inclined surfaces (112) and the adjacent third inclined surfaces (113) is less than the maximum distance between adjacent fixing members (11) and the mounting shell (3).

5. The CVT transmission pulley shaft support device according to claim 1, characterized in that: The mounting member (2) is provided with threaded holes (12) distributed in an annular pattern on one side close to the transmission housing (1); the mounting member (2) is provided with a truncated cone portion (121) at a position close to the threaded holes (12); the transmission housing (1) is provided with a through hole at a position close to the threaded holes (12); the through hole of the transmission housing (1) is provided with a shape corresponding to the truncated cone portion (121) on one side close to the mounting member (2); the truncated cone portion (121) is used to facilitate the correspondence between adjacent threaded holes (12) and adjacent through holes on the transmission housing (1).

6. A CVT transmission pulley shaft support device according to claim 5, characterized in that: The device also comprises a blocking ring (13), the blocking ring (13) being fixedly connected to a side of the mounting member (2) close to the pulley shaft (101), the mounting member (2) being sealingly and slidably connected to the mounting shell (3), the mounting shell (3) being provided with a limit cavity (131), the limit cavity (131) containing damping fluid, the blocking ring (13) sealingly and slidably sliding in the limit cavity (131), a spring being fixedly connected between a side of the blocking ring (13) away from the mounting member (2) and the mounting shell (3), a rotating ring (14) being connected to a position of the mounting member (2) close to the blocking ring (13) for limited rotation, and both the blocking ring (13) and the rotating ring (14) being provided with A through hole is arranged in an annular pattern, the through hole of the blocking ring (13) is blocked and matched with the rotating ring (14), the through hole of the rotating ring (14) is communicated and matched with the adjacent through hole on the blocking ring (13), the rotating ring (14) is sealingly and rotatably connected with the blocking ring (13), a push rod (15) is slidably connected to a position of the threaded hole (12) on one side of the mounting member (2), a spring is fixedly connected between the side of the push rod (15) close to the blocking ring (13) and the mounting member (2), an elastic rod (16) is fixedly connected to the side of the push rod (15) close to the blocking ring (13), and the elastic rod (16) passes through the mounting member (2) and is fixedly connected to the rotating ring (14).

7. A CVT transmission pulley shaft support device according to claim 6, characterized in that: The elastic rod (16) is provided with a bending portion, and the angle of the bending portion is between 30° and 45°.

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