An AMT interlock and self-locking mechanism

Abstract

The present invention relates to an AMT interlock and self-locking mechanism, and particularly relates to the technical field of gearboxes. An AMT interlock and self-locking mechanism provided by the present invention can improve the tightness of the connection between the second base body and the first base body by arranging a telescopic rod body and a spring structure on the first insertion block of the second base body and the first insertion port of the first base body. That is, during the driving of the vehicle, bumps will occur and affect the shift fork sleeve. Through the arranged spring structure, the forces on components such as the first base body and the second base body are evenly dispersed, reducing the probability of deformation at the connection part between the first base body and the second base body, and keeping the overall structural shape of the self-locking and interlocking structure in a stable state.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and particularly to an AMT interlock and self-lock mechanism. Background Art

[0002] Currently, the main transmission of a gearbox generally has multiple gears, such as 4 to 6 gears or more. The switching between each gear is mainly achieved by the axial movement of the shift fork shaft of the gearbox. In order to prevent phenomena such as gear disengagement and gear shifting chaos, a shift fork shaft self-lock device and an interlock device are generally specially provided inside or outside the gearbox. Among them, the shift fork shaft self-lock device is used for the self-lock of the shift fork shaft, and the shift fork shaft interlock device is used for the interlock of the shift fork shaft. Generally, the shift fork shaft self-lock device and the interlock device in the gearbox are independent of each other, and the shift fork shaft self-lock device and the shift fork shaft interlock device are respectively arranged in the corresponding areas of the gearbox. Obviously, such an arrangement method will make the structure of the gearbox body not compact enough and limit the overall arrangement of the gearbox body.

[0003] The main field of the reverse shift pin shift system is in the mechanical aspect. The traditional reverse shift mechanism mainly consists of a shift shaft and a shift fork. The traditional mechanism has a simple structure and reliable operation, and is widely used in various types of automobiles. However, the traditional reverse shift mechanism has the disadvantages of poor shift feel and inaccurate positioning of the neutral position of the reverse gear. The reverse shift pin shift system can eliminate the above disadvantages. Such a system mainly includes three main functions: reverse gear shifting, self-positioning of the reverse gear, and fifth gear shifting. This mechanism has the advantages of simple structure, good shift feel, reliable self-lock and interlock, etc.

[0004] The existing patent US20190152316A1 provides a turnover box brake structure and a cam follower with a brake assembly. The brake assembly includes an actuator, a sleeve structure, a fork structure, and a follower structure. The sleeve structure is connected to a shaft, and the shaft extends longitudinally along the drive shaft. The fork structure extends radially outward from the sleeve structure and is connected to a U-shaped fork member, and the fork member has a pair of U-shaped fork members. The tooth profile arranged around the engagement shaft is parallel to the drive shaft and offset in the radial direction. This follower mounting portion extends radially outward from the sleeve structure. The cam follower is made of metal, and part of it is made of metal. The plastic material encapsulated in the brake structure includes a cam follower, and the cam follower extends along the mounting direction with a follower shaft parallel to the drive shaft, and this follower shaft rotates around the drive shaft. This patent realizes the tight connection between the shift fork shaft and the shift fork sleeve, reduces the occupied space, and has good shift performance. However, this patent still has problems such as wear and inconvenient replacement of the shift fork sleeve during the shift process and after maintenance. Here, the inventor believes that there is still a great room for improvement. Summary of the Invention

[0005] In order to facilitate the assembly and disassembly of the fork sleeve clamping part, improve the service life of the fork sleeve, reduce the wear between the fork sleeve and the clamping gear, improve the lubrication effect, and improve the transmission efficiency of the vehicle.

[0006] The present invention provides an AMT interlock and self-lock mechanism, which includes a fork shaft. A fork sleeve is rotatably connected to the fork shaft. The fork sleeve includes a first fork head and a first body. The first fork head is connected to the first body and is arranged radially along the fork shaft. The first body includes a first base body. A second base body is inserted into one side of the first base body. An oil inlet is arranged on the upper surface of the second base body, and an arc-shaped oil groove is arranged inside the second base body.

[0007] Furthermore, the fork sleeve provided by this interlock and self-lock mechanism is sleeved on the fork shaft. At the same time, a shifting structure is also arranged on the fork shaft. It is worth mentioning that the first fork head is connected to the shifting structure, and the purpose of shifting gears is realized by adjusting the position of the fork sleeve on the fork shaft. The specific steps can refer to Patent CN113236773A. Since the speed of the vehicle will constantly change during driving, the gearbox needs to select and shift gears to adjust the conversion of the vehicle between different speeds. Therefore, the fork sleeve will have frequent displacements to control the switching of multiple gears. As a result, the fork sleeve may have a problem of excessive wear. And the traditional fork sleeve cannot locally replace the clamping components below. Therefore, the improvement of this part of the present invention can realize the local replacement of the clamping part below the fork sleeve, so as to improve the service life of this interlock and self-lock mechanism and reduce the cost required for replacing the fork sleeve.

[0008] In the present invention, the second base body is arc-shaped, and a first insertion block is arranged at the top of the second base body. A first insertion port is formed on the surface of the first base body to cooperate with the first insertion block.

[0009] Preferably, the second base body can be cooperatively installed with the first base body, that is, align the first insertion block above the second base body with the first insertion port and press it tightly. It is worth mentioning that an opening can be arranged in the middle of the first insertion block arranged on the second base body. A sphere is arranged in the opening. One end of the sphere is connected to a spring, and both the sphere and the spring are arranged inside the opening. The other end of the spring is connected to a telescopic rod body. Part of the telescopic rod body is arranged outside the opening, and the other part is arranged inside the opening. Similarly, corresponding openings are also arranged on the first insertion port of the first base body, and a sphere and a spring are also arranged inside the opening. One end of the spring is connected to another telescopic rod body. The outer radius of this telescopic rod body is smaller than the inner radius of the telescopic rod body located in the first insertion block, and the two telescopic rod bodies can cooperate with each other to realize the tightness of the connection between the first base body and the second base body.

[0010] Meanwhile, an oil groove is provided on the side of the second base body, which can be used to circulate a small amount of lubricating oil liquid, playing a lubricating role for installing the second base body and components such as the gear connected below the shift fork sleeve. And the surface of the second base body is arc-shaped, and its oil grooves are arranged on the left and right sides of the arc-shaped surface. And fine micropores are arranged on the inner side of the clamping component below the second base body. The oil liquid in the oil groove can infiltrate the gear clamped below through the micropores, further improving the operation efficiency of the gear and the overall service life of the device, further reducing the wear of the shift fork sleeve itself, thereby reducing the replacement frequency of the shift fork sleeve and reducing the costs required for the replacement and maintenance of the entire self-locking and interlocking mechanism.

[0011] Furthermore, by arranging a telescopic rod body and a spring structure on the first plug-in block of the second base body and the first plug-in port of the first base body, the connection tightness between the second base body and the first base body can also be improved. That is, during the vehicle driving process, bumps will occur, which will affect the shift fork sleeve. Through the arranged spring structure, the forces on components such as the first base body and the second base body are evenly dispersed, reducing the deformation probability at the connection part between the first base body and the second base body, keeping the overall structural shape of the self-locking and interlocking structure in a stable state, and reducing the influence of the vibration caused by the bumps during the vehicle driving process on the connection tightness between the first base body and the second base body.

[0012] In the present invention, a rib plate assembly is installed on the surface of the side where the first base body is connected to the second base body. The rib plate assembly is triangular. The rib plate assembly includes a square first surface, and a plurality of first grooves are arranged on the first surface along the radial direction of the first surface.

[0013] Further, the rib plate assembly is arranged at the upper end of the second base body, and the back surface of the rib plate assembly is fixedly connected to the first base body to enhance the connection strength between the first base body and the second base body. And the arrangement of the rib plate assembly can limit the size of the oil groove. That is, the rib plate assembly is arranged on the surface of the first base body, and its end contacts the second base body, avoiding the change of the size of the oil groove below caused by the offset of the second base body due to the vibration brought by the bumps during the vehicle driving process.

[0014] In the present invention, an oil leakage port is arranged at the end of the first groove, and one end of the oil leakage port is communicated with an oil storage cavity, and the oil storage cavity is a cylindrical cavity.

[0015] Further, in actual work, lubricating oil needs to be added to the shift fork shaft and the shift fork sleeve to ensure the smooth operation of the entire self-locking and interlocking structure. During this period, due to the frequent displacement of the shift fork sleeve on the shift fork shaft, it may also cause the oil to drip downward along the shift fork sleeve. To avoid this phenomenon, a first groove is added to the rib plate assembly to guide the flow of the oil, so that the oil dripping from the shift fork shaft can be collected on the first groove, and further flows into the internal oil storage cavity through the oil leakage hole on the first groove for storage, and can further be discharged through the oil outlet hole provided on the side and flows into the oil groove of the second base below. At the same time, a plurality of micropores are provided inside the clamping portion at the lower part of the second base, and the micropores are communicated with the oil groove, so that the oil in the oil groove can further flow through the micropores to the surface of the gear clamped below, improving the overall working efficiency of the device.

[0016] In the present invention, both sides of the first surface are second surfaces, an oil outlet hole is provided on the second surface, an oil storage cavity is provided inside the rib plate assembly, and the oil outlet hole is communicated with the oil storage cavity.

[0017] Further, the oil storage cavity has a columnar structure, and the inner diameter of the oil storage cavity is larger than the outer diameter of the sealing blocks provided at both ends of the rolling member, avoiding the problem that the outer diameter of the rolling member is too large to cause the oil in the oil storage cavity to be unable to be discharged smoothly, and also avoiding the problem that the oil temperature rises and the lubrication effect deteriorates due to excessive friction between the rolling member and the inner wall of the oil storage cavity during rolling displacement.

[0018] In the present invention, a rolling member is provided in the oil storage cavity. The rolling member includes a first cylinder, and spherical sealing blocks are connected to both ends of the first cylinder. The rolling member can move radially in the oil storage cavity.

[0019] Further, the outer diameter of the first cylinder is larger than that of the sealing blocks at both ends, and the radius of the first cylinder is smaller than the inner diameter of the oil storage cavity, thereby avoiding the accumulation of oil around the first cylinder between the sealing blocks and also avoiding the problem that part of the oil accumulates inside the oil storage cavity and cannot be discharged smoothly.

[0020] In the present invention, a flow limiting member is also cooperatively provided on the oil outlet hole. The flow limiting member has a stepped columnar structure. A rolling member is provided on one side of the flow limiting member, and one end of the flow limiting member can be attached to the rolling member.

[0021] Further, during the working process, the displacement and sway of the fork sleeve further drive the internal rolling elements to generate radial displacement, and can discharge the oil liquid remaining in the oil storage cavity to the outside. At the same time, a current-limiting component is installed on the oil outlet hole. The current-limiting component is a stepped structure, where the part arranged on the wall thickness of the rib plate assembly is a cylindrical structure with a smaller diameter, and the part arranged inside the oil storage cavity has a larger diameter, so that the oil liquid can be discharged smoothly, and at the same time, the oil liquid is prevented from sticking in the channel of the current-limiting component.

[0022] Compared with the prior art, the significant technical progress of the present invention lies in that by arranging the telescopic rod body and the spring structure on the first insertion block of the second base body and the first insertion port of the first base body, the tightness of the connection between the second base body and the first base body can be improved. That is, during the driving process of the vehicle, bumps will occur and affect the fork sleeve. Through the arranged spring structure, the forces on components such as the first base body and the second base body are evenly dispersed, reducing the deformation probability at the connection part between the first base body and the second base body, and keeping the overall structural shape of the self-locking and interlocking structure in a stable state; at the same time, rib plate assemblies are arranged on the first base body to keep the overall structural shape of the self-locking and interlocking structure in a stable state, and reduce the influence of the vibration caused by bumps during the driving process of the vehicle on the tightness of the connection between the first base body and the second base body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending based on the provided drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of an AMT interlock and self-lock mechanism according to the present invention;

[0025] Figure 2 Structural schematic diagram of the second base body according to the present invention;

[0026] Figure 3 For the present invention Figure 1 Enlarged structural schematic diagram at position A in;

[0027] Figure 4 Internal structural schematic diagram of the rib plate assembly according to the present invention.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS

[0029] 1 - Shift fork shaft; 2 - Shift fork sleeve; 21 - First shift head; 22 - First body; 221 - First base; 222 - Second base; 223 - First plug-in block; 31 - Telescopic rod body; 4 - Rib plate assembly; 41 - First surface; 42 - First groove; 421 - Oil leakage port; 44 - Second surface; 441 - Oil outlet hole; 45 - Oil storage cavity; 461 - First cylinder; 462 - Sealing block; 47 - Flow limiting part. Detailed implementation mode

[0030] Example 1:

[0031] Refer to the appendix Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention provides an AMT interlock and self-lock mechanism, which includes a shift fork shaft 1. A shift fork sleeve 2 is rotatably connected to the shift fork shaft 1. The shift fork sleeve 2 includes a first shift head 21 and a first body 22. The first shift head 21 is connected to the first body 22 and is arranged radially along the shift fork shaft 1. The first body 22 includes a first base 221. A second base 222 is inserted into one side of the first base 221. An oil inlet is provided on the upper surface of the second base 222, and an arc-shaped oil groove is provided inside the second base 222.

[0032] Furthermore, the shift fork sleeve 2 provided in this interlock and self-lock mechanism is sleeved on the shift fork shaft 1. At the same time, a shift structure is also provided on the shift fork shaft 1. It is worth mentioning that the first shift head 21 is connected to the shift structure, and the purpose of shifting gears is achieved by adjusting the position of the shift fork sleeve 2 on the shift fork shaft 1. The specific steps can refer to Patent CN113236773A. Since the speed of the vehicle will constantly change during driving, the gearbox needs to select and shift gears to adjust the conversion of the vehicle between different speeds. Therefore, the shift fork sleeve 2 will have frequent displacements to control the switching of multiple gears. As a result, the shift fork sleeve 2 may have a problem of excessive wear, and the traditional shift fork sleeve 2 cannot locally replace the clamping components below. Therefore, the improvement of this part in the present invention can achieve the local replacement of the clamping part below the shift fork sleeve 2, so as to improve the service life of this interlock and self-lock mechanism and reduce the cost required to replace the shift fork sleeve 2.

[0033] In the present invention, the second base 222 is arc-shaped, and a first plug-in block 223 is provided at the top of the second base 222. A first plug-in port is opened on the surface of the first base 221 to cooperate with the first plug-in block 223.

[0034] Preferably, the second base body 222 can be installed in cooperation with the first base body 221, that is, the first plug-in block 223 above the second base body 222 is aligned with the first plug-in port and then pressed firmly. It is worth mentioning that an opening is provided in the middle of the first plug-in block 223 provided on the second base body 222. A sphere is provided in the opening. One end of the sphere is connected to a spring, and both the sphere and the spring are arranged inside the opening. The other end of the spring is connected to a telescopic rod body 31. Part of the telescopic rod body 31 is arranged outside the opening, and the other part is arranged inside the opening. Similarly, a corresponding opening is also provided on the first plug-in port of the first base body 221, and a sphere and a spring are also arranged inside the opening. One end of the spring is connected to another telescopic rod body 31. The outer radius of the telescopic rod body 31 is smaller than the inner radius of the telescopic rod body 31 located in the first plug-in block 223, and the two telescopic rod bodies 31 can cooperate with each other to achieve the tightness of the connection between the first base body 221 and the second base body 222.

[0035] Meanwhile, an oil groove is provided on the side of the second base body 222, which can be used to circulate a small amount of lubricating oil liquid, playing a lubricating role for the installation of the second base body 222 and components such as the gear connected to the lower part of the shift fork sleeve 2. And the surface of the second base body 222 is arc-shaped, and its oil grooves are arranged on the left and right sides of the arc-shaped surface. And fine micropores are provided on the inner side of the clamping component below the second base body 222. The oil liquid in the oil groove can infiltrate the gear clamped below through the micropores, further improving the operation efficiency of the gear and the overall service life of the device, further reducing the wear of the shift fork sleeve 2 itself, and thus reducing the replacement frequency of the shift fork sleeve 2, reducing the costs required for the replacement and maintenance of the entire self-locking and interlocking mechanism.

[0036] Furthermore, by providing the telescopic rod body 31 and the spring structure on the first plug-in block 223 of the second base body 222 and the first plug-in port of the first base body 221, the tightness of the connection between the second base body 222 and the first base body 221 can also be improved. That is, during the driving of the vehicle, bumps will occur, which will affect the shift fork sleeve 2. Through the provided spring structure, the forces on components such as the first base body 221 and the second base body 222 are evenly dispersed, reducing the probability of deformation at the connection part between the first base body 221 and the second base body 222, keeping the overall structural shape of the self-locking and interlocking structure in a stable state, and reducing the influence of the vibration caused by the bumps during the driving of the vehicle on the tightness of the connection between the first base body 221 and the second base body 222.

[0037] In the present invention, a rib plate assembly 4 is installed on the surface of the side where the first base body 221 is connected to the second base body 222. The rib plate assembly 4 is triangular. The rib plate assembly 4 includes a square first surface 41, and a plurality of first grooves 42 are provided on the first surface 41 and arranged radially along the first surface 41.

[0038] Further, the rib plate assembly 4 is arranged at the upper end of the second base body 222, and the back surface of the rib plate assembly 4 is fixedly connected to the first base body 221 to enhance the connection strength between the first base body 221 and the second base body 222. Moreover, the arrangement of the rib plate assembly 4 can define the size of the oil groove. That is, the rib plate assembly 4 is arranged on the surface of the first base body 221, and its end contacts the second base body 222, avoiding the vibration caused by the bumps during vehicle driving, which may cause the second base body 222 to shift, thereby changing the size of the lower oil groove.

[0039] In the present invention, an oil leakage port 421 is arranged at the end of the first groove body 42. One end of the oil leakage port 421 is communicated with an oil storage cavity 45, and the oil storage cavity 45 is a cylindrical cavity.

[0040] Further, during actual operation, lubricating oil needs to be added to the shift fork shaft 1 and the shift fork sleeve 2 to ensure the smooth operation of the entire self-locking and interlocking structure. During this period, due to the frequent displacement of the shift fork sleeve 2 on the shift fork shaft 1, it may also cause the oil to drip down along the shift fork sleeve 2. To avoid this phenomenon, a first groove body 42 is added to the rib plate assembly 4 to guide the flow direction of the oil, so that the oil dripping from the shift fork shaft 1 can be collected on the first groove body 42, and further flow into the internal oil storage cavity 45 through the oil leakage port 421 on the first groove body 42 for storage. Moreover, it can be further discharged through the oil outlet hole 441 arranged on the side and flow into the oil groove of the lower second base body 222. At the same time, a plurality of micropores are arranged on the inner side of the clamping part at the lower part of the second base body 222, and the micropores are communicated with the oil groove, so that the oil in the oil groove can further flow through the micropores to the surface of the lower clamped gear, improving the overall working efficiency of the device.

[0041] In the present invention, both sides of the first surface 41 are second surfaces 44. Oil outlet holes 441 are arranged on the second surfaces 44. An oil storage cavity 45 is arranged inside the rib plate assembly 4, and the oil outlet holes 441 are communicated with the oil storage cavity 45.

[0042] Further, the oil storage cavity 45 has a columnar structure, and the inner diameter of the oil storage cavity 45 is larger than the outer diameter of the sealing blocks 462 arranged at both ends of the rolling member, avoiding the problem that the outer diameter of the rolling member is too large to cause the oil in the oil storage cavity 45 to be discharged smoothly, and also avoiding the problem that the rolling member excessively rubs the inner wall of the oil storage cavity 45 during rolling displacement, resulting in the increase of oil temperature and the deterioration of lubrication effect.

[0043] In the present invention, a rolling member is arranged in the oil storage cavity 45. The rolling member includes a first cylinder 461, and spherical sealing blocks 462 are connected to both ends of the first cylinder 461. The rolling member can move radially in the oil storage cavity 45.

[0044] Furthermore, the outer diameter of the first column 461 is larger than the sealing blocks 462 at both ends, and the radius of the first column 461 is smaller than the inner diameter of the oil storage chamber 45, thereby preventing oil from accumulating around the first column 461 between the sealing blocks 462, and also avoiding the problem of some oil accumulating inside the oil storage chamber 45 and being unable to be discharged smoothly.

[0045] In the present invention, a flow limiting member 47 is also provided on the oil outlet 441. The flow limiting member 47 is in a stepped columnar structure. A rolling member is provided on one side of the flow limiting member 47. One end of the flow limiting member 47 can be in contact with the rolling member.

[0046] Furthermore, during the working process, the displacement and shaking of the fork sleeve 2 further drives the internal rolling elements to produce radial displacement, and can discharge the oil retained in the oil storage chamber 45 to the outside. At the same time, a flow limiting member 47 is installed on the oil outlet hole 441. The flow limiting member 47 is a step-shaped structure, in which the part arranged on the wall thickness of the rib assembly 4 is a cylindrical structure with a smaller diameter, and the part arranged inside the oil storage chamber 45 has a larger diameter, so that the oil can be discharged smoothly and the oil can be prevented from sticking in the channel of the flow limiting member 47.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An AMT interlock and self-locking mechanism, comprising a shift fork shaft (1), a shift fork sleeve (2) is rotatably connected to the shift fork shaft (1), the shift fork sleeve (2) includes a first shift head (21) and a first body (22), the first shift head (21) is connected to the first body (22) and is arranged along the radial direction of the shift fork shaft (1), and is characterized in that, The first body (22) includes a first base body (221). A second base body (222) is inserted into one side of the first base body (221). An oil inlet is provided on the upper surface of the second base body (222), and an arc-shaped oil groove is provided inside the second base body (222). The second base body (222) is arc-shaped. A first insertion block (223) is provided at the top of the second base body (222). A first insertion port is formed on the surface of the first base body (221) to cooperate with the first insertion block (223). On one side surface of the first base body (221) connected to the second base body (222), a rib plate assembly (4) is installed. The rib plate assembly (4) is triangular. The rib plate assembly (4) includes a square first surface (41), and a plurality of first grooves (42) are formed on the first surface (41) and arranged radially along the first surface (41). The second base body (222) is cooperatively installed with the first base body (221). That is, after aligning the first insertion block (223) above the second base body (222) with the first insertion port and pressing it tightly, an opening is provided in the middle of the first insertion block (223) provided on the second base body (222). A sphere is provided in the opening. One end of the sphere is connected to a spring, and both the sphere and the spring are provided inside the opening. The other end of the spring is connected to a telescopic rod body (31). Part of the telescopic rod body (31) is arranged outside the opening, and the other part is arranged inside the opening. The outer diameter of the first cylinder (461) is larger than the plugging blocks (462) at both ends, and the radius of the first cylinder (461) is smaller than the inner diameter of the oil storage cavity (45). An oil leakage port (421) is provided at the end of the first groove (42). One end of the oil leakage port (421) is communicated with an oil storage cavity (45), and the oil storage cavity (45) is a cylindrical cavity.

2. The AMT interlock and self-locking mechanism according to claim 1, wherein, Both sides of the first surface (41) are second surfaces (44). Oil outlet holes (441) are provided on the second surfaces (44). An oil storage cavity (45) is provided inside the rib plate assembly (4), and the oil outlet holes (441) are communicated with the oil storage cavity (45).

3. The AMT interlock and self-locking mechanism according to claim 2, wherein, A rolling member is provided in the oil storage cavity (45). The rolling member includes a first cylinder (461). Plugging blocks (462) are connected to both ends of the first cylinder (461), and the rolling member can move radially in the oil storage cavity (45).

4. The AMT interlock and self-locking mechanism according to claim 2, wherein, A flow limiting member (47) is also cooperatively provided on the oil outlet hole (441). The flow limiting member (47) has a stepped cylindrical structure. A rolling member is provided on one side of the flow limiting member (47), and one end of the flow limiting member (47) can be attached to the rolling member.

Images