Synchronizer shifting fork durability test device

Abstract

The utility model relates to a durability testing device for a synchronizer shifting fork, and relates to the technical field of vehicle part testing, and the testing device comprises a rotation driving assembly which comprises a driving shaft, and the driving shaft is connected with a synchronizer assembly and is used for driving the synchronizer assembly to rotate; the linear driving assembly is connected with the gear shifting fork and used for driving the gear shifting fork to move in the axial direction of the synchronizer assembly; and the gear shifting fork is assembled on the synchronizer assembly. The durability testing device for the synchronizer gear shifting fork is simple in structure, the working efficiency of durability testing of gear shifting fork parts can be improved, and the development and testing cost can be greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parts testing technical field, concretely relates to a synchronizer gear shift fork endurance test device. BACKGROUND

[0002] At present, the gear shift fork is indispensable for the synchronizer gear shift in the speed reducer or gearbox, and it is necessary to verify the service durability and durability of the designed and developed fork part.

[0003] In the related art, the verification scheme is usually to use a synchronizer assembly test bench or a gearbox assembly bench to conduct endurance test. However, the test preparation and detection cycle of the above test are relatively long, which not only has low work efficiency, but also has high cost. UTILITY MODEL CONTENTS

[0004] The synchronizer gear shift fork endurance test device provided by the present application can solve the technical problems of low work efficiency and high cost in current gear shift fork endurance test.

[0005] The synchronizer gear shift fork endurance test device provided by the present application comprises:

[0006] A rotating driving assembly comprising a driving shaft, the driving shaft is connected with the synchronizer assembly and used to drive the synchronizer assembly to rotate;

[0007] A linear driving assembly connected with the gear shift fork and used to drive the gear shift fork to move along the axial direction of the synchronizer assembly; the gear shift fork is assembled on the synchronizer assembly.

[0008] In some embodiments, one end of the driving shaft is sleeved with a connecting base, and the connecting base comprises:

[0009] A spline part, on which the synchronizer assembly is sleeved;

[0010] A limiting part located on the side of the spline part close to the driving shaft and having an outer diameter greater than that of the spline part.

[0011] In some embodiments, the end face of the spline part away from the limiting part is provided with a pressing block, and the projection of the end face on the pressing block is located in the pressing block.

[0012] In some embodiments, the linear driving assembly comprises:

[0013] A moving shaft, on which the gear shift fork is sleeved and fixed;

[0014] A first driving member, the driving end of which is connected with the moving shaft through a transition piece.

[0015] In some embodiments, the transition piece comprises:

[0016] a sliding shaft, one end of the sliding shaft is arranged opposite to the driving end of the first driving member;

[0017] a transition connecting block, one end of the transition connecting block is connected to the end of the sliding shaft away from the first driving member, and the other end of the transition connecting block is connected to the moving shaft.

[0018] In some embodiments, a pressure sensor is connected to the end of the sliding shaft facing the first driving member.

[0019] In some embodiments, the device further comprises a box body, the moving shaft and the synchronizer assembly are located in the box body, the transition member penetrates through the first side wall of the box body, the driving shaft penetrates through the second side wall of the box body, and the first side wall and the second side wall are arranged opposite to each other.

[0020] In some embodiments, the end of the moving shaft away from the transition member is movably inserted into the first positioning block, and the first positioning block is fixed to the second side wall through the second positioning block.

[0021] The first positioning block and the second positioning block are both provided with a waist-shaped hole, the two waist-shaped holes are perpendicular to each other, and the two waist-shaped holes are connected through a fastener.

[0022] In some embodiments, a limiting ring is sleeved on the side of the moving shaft close to the first positioning block.

[0023] In some embodiments, an oil pipe is further provided on the side wall of the box body, and an oil outlet hole is arranged at the bottom of the box body.

[0024] One end of the oil pipe located outside the box body is connected to an oil tank, and the other end of the oil pipe located inside the box body is located above the synchronizer assembly.

[0025] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0026] The driving shaft of the rotating driving assembly can drive the synchronizer assembly to rotate, and the linear driving assembly can drive the shift fork to move axially along the synchronizer assembly. Since the shift fork is assembled on the synchronizer assembly, when the linear driving assembly drives the shift fork to move forward or backward, the synchronizer sleeve of the synchronizer assembly can be axially moved, and since the synchronizer assembly has a rotating speed, when the shift fork moves the synchronizer sleeve of the synchronizer assembly, a certain resistance exists, a friction force is generated between the shift fork and the synchronizer sleeve, and thus the durability of the shift fork can be tested, and the durability of the shift fork can also be tested.

[0027] The test device of the present application not only has a simple structure, but also can improve the work efficiency of the durability test of the shift fork parts, and can greatly reduce the development and test cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 It is a structural schematic diagram of the synchronizer shift fork durability test device in the embodiments of the present application.

[0030] Figure 2 It is a structural schematic diagram of the shift fork in the embodiments of the present application.

[0031] Figure 3 It is a structural schematic diagram of the synchronizer assembly in the embodiments of the present application.

[0032] Figure 4 It is an installation schematic diagram of the driving shaft and the moving shaft in the embodiments of the present application.

[0033] In the figure: 1, shift fork; 2, synchronizer sleeve; 3, synchronizer ring;

[0034] 10, rotating driving assembly; 11, driving shaft; 12, connecting base; 13, pressing block; 14, second driving member; 15, belt; 16, pulley; 17, driving shaft support; 18, inertia disc;

[0035] 20, linear driving assembly; 21, moving shaft; 22, first driving member; 221, pneumatic control valve; 23, sliding shaft; 24, transition connecting block; 25, first positioning block; 26, second positioning block; 27, limiting ring; 28, pressure sensor;

[0036] 30, box body; 31, first side wall; 32, second side wall;

[0037] 40, oil pipe; 50, control cabinet. DETAILED DESCRIPTION

[0038] In order to make the person in the art better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] The embodiment of the present application provides a synchronizer shift fork durability test device, which can solve the technical problems of low work efficiency and high cost of shift fork durability test in the prior art.

[0040] As shown in Figure 1 The synchronizer shift fork durability test device comprises a rotary driving assembly 10 and a linear driving assembly 20.

[0041] The rotary driving assembly 10 comprises a driving shaft 11, the driving shaft 11 is connected with a synchronizer assembly, and the driving shaft 11 is used for driving the synchronizer assembly to rotate.

[0042] The linear driving assembly 20 is connected with a shift fork 1, the linear driving assembly 20 is used for driving the shift fork 1 to move along the axial direction of the synchronizer assembly, and the shift fork 1 is assembled on the synchronizer assembly. The linear driving assembly 20 can drive the shift fork 1 to move along the direction parallel to the axial direction of the synchronizer assembly.

[0043] As shown in Figure 2 and Figure 3 The synchronizer assembly comprises a synchronizer sleeve 2 and a synchronizer ring 3, and the synchronizer ring 3 is embedded and placed on the inner side of the synchronizer sleeve 2. The shift fork body of the shift fork 1 is semicircular arc-shaped, is assembled with a circular groove of the synchronizer sleeve 2, and the synchronizer sleeve 2 can also move along the axial direction of the driving shaft 11 under the action of the shift fork 1.

[0044] In the embodiment, the driving shaft of the rotary driving assembly can drive the synchronizer assembly to rotate, and the linear driving assembly can drive the shift fork to move along the axial direction of the synchronizer assembly. Since the shift fork is assembled on the synchronizer assembly, when the linear driving assembly drives the shift fork to move forward or backward, the synchronizer sleeve of the synchronizer assembly can be actuated to move axially. Since the synchronizer assembly has a rotating speed, when the shift fork actuates the synchronizer sleeve to move, a certain resistance exists, friction is generated between the shift fork and the synchronizer sleeve, and thus the durability of the shift fork can be tested, and the durability of the shift fork can also be tested. The test device has a simple structure, can improve the work efficiency of the durability test of the shift fork part, and can greatly reduce the development and test cost.

[0045] Further, in an embodiment, one end of the driving shaft 11 is sleeved with a connecting base 12, and the connecting base 12 comprises a spline part and a limiting part.

[0046] The synchronizer assembly is sleeved on the spline part. The limiting part is located on the side of the spline part close to the driving shaft 11, and the outer diameter of the limiting part is greater than the outer diameter of the spline part.

[0047] Optionally, the spline part and the limiting part are integrally formed.

[0048] Further, in an embodiment, the end face of the spline portion away from the limiting portion is provided with a pressing block 13, and the projection of the end face on the pressing block 13 is located in the pressing block 13.

[0049] Optionally, the pressing block 13 is fixed on the end face of the spline portion by a first screw.

[0050] In the embodiment, the rotation of the driving shaft 11 can drive the connection base 12 to rotate, and further drive the synchronizer assembly to rotate. By limiting the synchronizer assembly by the limiting portion and the pressing block 13, the synchronizer assembly can be prevented from being pulled out of the spline portion.

[0051] Further, in an embodiment, the linear driving assembly 20 includes a moving shaft 21, a transition piece, and a first driving piece 22.

[0052] The shifting fork 1 is sleeved and fixed on the moving shaft 21.

[0053] The driving end of the first driving piece 22 is connected to the moving shaft 21 through the transition piece.

[0054] Optionally, the moving shaft 21 is connected and fixed with the perforation on the shifting fork 1 by a second screw, and the moving shaft 21 is further provided with a first positioning screw hole for positioning the second screw.

[0055] Further, in the embodiment, the transition piece includes a sliding shaft 23 and a transition connecting block 24.

[0056] The end of the sliding shaft 23 away from the transition connecting block 24 is arranged opposite to the driving end of the first driving piece 22.

[0057] One end of the transition connecting block 24 is connected with the sliding shaft 23, and the other end of the transition connecting block 24 is connected with the moving shaft 21.

[0058] In the embodiment, by setting transition connecting blocks 24 of different sizes, different models of shifting forks 1 and synchronizer assemblies can be adapted.

[0059] Optionally, the sliding shaft 23 is a spline shaft, a threaded hole for connecting the transition connecting block 24 is arranged in the center of the side surface of the spline shaft, and the two are fixedly connected by a third screw. The other end of the transition connecting block 24 is provided with a hole and is fixedly connected with the moving shaft 21 by a fourth screw, so as to realize the simultaneous and same-direction movement of the sliding shaft 23, the transition connecting block 24, and the moving shaft 21.

[0060] Optionally, the moving shaft 21 is further provided with a second positioning screw hole for positioning the fourth screw.

[0061] Preferably, a pressure sensor 28 is connected to one end of the sliding shaft 23 facing the first driving member 22. Optionally, the sliding shaft 23 is connected and fixed to the pressure sensor 28 by a fifth screw.

[0062] Optionally, the first driving component 22 is a cylinder, which is connected to the pneumatic control valve 221.

[0063] In this embodiment, the sliding shaft 23 slides under the thrust of the first driving member 22. The thrust value of the first driving member 22 can be detected by the pressure sensor 28, and then the pneumatic control valve 221 can be adjusted to control the pressure value required for the test.

[0064] Optionally, the sliding shaft 23 is positioned directly opposite the driving end of the first driving member 22 and spaced apart to prevent the driving end from continuously contacting and squeezing the pressure sensor 28.

[0065] In this embodiment, the cylinder drive end axis and the spline shaft axis are on the same straight line.

[0066] like Figure 4 As shown, in one embodiment, the above-mentioned testing device further includes a housing 30, in which the above-mentioned moving shaft 21 and synchronizer assembly are both located.

[0067] The aforementioned transition piece passes through the first side wall 31 of the aforementioned housing 30, and the aforementioned drive shaft 11 passes through the second side wall 32 of the aforementioned housing 30. The aforementioned first side wall 31 and second side wall 32 are arranged opposite to each other.

[0068] Optionally, the sliding shaft 23 of the aforementioned transition member passes through the spline flange on the first side wall 31 of the aforementioned housing 30, the transition connecting block 24 of the aforementioned transition member is located inside the housing 30, and the aforementioned first driving member 22 is located outside the housing 30.

[0069] In this embodiment, the end of the drive shaft 11 that extends out of the housing 30 is connected to a second drive member 14.

[0070] Optionally, the second driving component 14 is a drive motor. The drive shaft 11 is mounted between the second side wall 32 of the housing 30 using a raceway bearing and a flange. The part of the drive shaft 11 that extends out of the housing 30 is fitted with a pulley 16. The drive motor drives the pulley 16 to rotate through the belt 15, thereby driving the drive shaft 11 to rotate.

[0071] Optionally, the end of the drive shaft 11 that extends out of the housing 30 is provided with a drive shaft bracket 17, and the drive shaft 11 is also matched with an inertia disk 18 to ensure that the drive shaft rotates smoothly.

[0072] Further, in an embodiment, the moving shaft 21 is movably inserted into the first positioning block 25, and the first positioning block 25 is fixed to the second side wall 32 through the second positioning block 26. The first positioning block 25 and the second positioning block 26 are both provided with a waist-shaped hole, and the two waist-shaped holes are perpendicular to each other and connected through a fastener.

[0073] Optionally, the fastener is a screw or a bolt. The second positioning block 26 can also be fixed to the second side wall 32 through a screw.

[0074] In the embodiment, the moving shaft 21 can move axially by being movably inserted into the first positioning block 25. The first positioning block 25 and the second positioning block 26 are both provided with a waist-shaped hole, and the two waist-shaped holes are perpendicular to each other. The installation position of the moving shaft 21 can be adjusted through different fastening positions of the fastener, so that the moving shaft 21 is horizontally connected with the shift fork 1, and the sliding is smooth.

[0075] Further, in an embodiment, the moving shaft 21 is movably inserted into the first positioning block 25, and the first positioning block 25 is fixed to the second side wall 32 through the second positioning block 26. The first positioning block 25 and the second positioning block 26 are both provided with a waist-shaped hole, and the two waist-shaped holes are perpendicular to each other and connected through a fastener.

[0076] In the embodiment, the moving shaft 21 can move axially by being movably inserted into the first positioning block 25. The first positioning block 25 and the second positioning block 26 are both provided with a waist-shaped hole, and the two waist-shaped holes are perpendicular to each other. The installation position of the moving shaft 21 can be adjusted through different fastening positions of the fastener, so that the moving shaft 21 is horizontally connected with the shift fork 1, and the sliding is smooth.

[0077] In the embodiment, the moving shaft 21 can move axially by being movably inserted into the first positioning block 25. The first positioning block 25 and the second positioning block 26 are both provided with a waist-shaped hole, and the two waist-shaped holes are perpendicular to each other. The installation position of the moving shaft 21 can be adjusted through different fastening positions of the fastener, so that the moving shaft 21 is horizontally connected with the shift fork 1, and the sliding is smooth.

[0078] Optionally, the axial displacement of the shift fork 1 limited by the limiting ring 27 can ensure that the axial movement of the synchronizer sleeve does not exceed the ball socket, so that the synchronizer sleeve is reset without the axial thrust of the shift fork 1.

[0079] Optionally, the moving shaft 21 is also provided with a snap ring groove for the installation and positioning of the limiting ring 27.

[0080] Further, in an embodiment, the side wall of the box 30 is also provided with an oil pipe 40, and the bottom of the box 30 is provided with an oil outlet hole. Optionally, the oil pipe 40 is arranged in the second side wall 32.

[0081] In the embodiment, one end of the oil pipe 40 located outside the box 30 is connected to an oil tank, and the other end of the oil pipe 40 located inside the box 30 is located above the synchronizer assembly.

[0082] In this embodiment, by setting the oil pipe 40, the shift fork 1 and the synchronizer assembly can be sprayed with lubricating oil during operation for lubrication. The oil outlet hole is provided at the bottom of the box 30 to facilitate the recycling of the lubricating oil.

[0083] Preferably, the lubricating oil flowing out of the oil outlet hole can be filtered by the oil pump and then enter the storage tank for recycling.

[0084] Further, the device of the embodiment further comprises an electrical control system control cabinet 50, and the control cabinet 50 is connected with the cylinder, the driving motor, the driving shaft and the oil pipe switch respectively, and is used for controlling the action frequency of the cylinder, the start and stop of the driving motor, the control of the lubricating oil, and setting and collecting functions of testing the rotating speed of the driving shaft.

[0085] Optionally, the device of the embodiment further comprises a rectangular platform, and the control cabinet, the box, the oil tank, the rotating driving assembly and the linear driving assembly are all arranged on the platform.

[0086] When the device of the embodiment is tested, the motor drives the driving shaft to rotate, and then drives the synchronizer assembly to rotate, and the shift fork is assembled in the synchronizer sleeve groove and is in an idle state; at this time, the cylinder is started, and when the cylinder pushes the pressure sensor and the spline shaft forward, the spline shaft can only slide axially, and then drives the moving shaft to move forward through the transition connecting block, and the moving shaft is fixed with the shift fork, so as to drive the shift fork to move axially, and the moving shaft is limited in displacement by the limiting ring, so that the axial movement distance of the shift fork is limited, the displacement amount of the shift fork is also controlled, the simulated gear shifting condition is realized, and the durability test function is completed.

[0087] When the cylinder is pushed forward to reach the set time each time, the cylinder is unloaded by the electrical control system, the shift fork has no axial load at this time and is in an idle state, and the synchronizer assembly is in a rotating state, and since the synchronizer sleeve and the hub have a sliding block ball socket in the middle, the synchronizer sleeve has no axial force to push it back after it does not pass the ball socket, and then drives the shift fork to reset. Through the control of the electrical control system, the above actions are repeated to achieve the durability test function.

[0088] In addition, under the working condition that the driving shaft drives the synchronizer assembly to rotate, the oil pipe provided by the box grid is needed to spray lubricating oil for lubrication, and the shift fork rubs with the synchronizer sleeve in the test state, which is also lubricated by the oil pipe spraying lubricating oil, and the oil outlet hole is provided at the bottom of the box, and the lubricating oil flowing out is filtered by the oil pump and then enters the storage tank for recycling.

[0089] The testing device of the embodiment has simple structure, is convenient and fast to operate, can test the durability and the strength of the shift fork at the same time, improves the work efficiency of the durability test of the shift fork, and reduces the development and test cost.

[0090] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0091] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0092] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A synchronizer shift fork durability test device characterized by, The device comprises: a rotating driving assembly (10) comprising a driving shaft (11) connected with a synchronizer assembly for driving the synchronizer assembly to rotate; a linear driving assembly (20) connected with a shift fork (1) for driving the shift fork (1) to move axially along the synchronizer assembly; the shift fork (1) is assembled on the synchronizer assembly.

2. The synchronizer shift fork durability test device of claim 1, wherein, One end of the driving shaft (11) is sleeved with a connecting base (12), the connecting base (12) comprises: a spline part, on which the synchronizer assembly is sleeved; a limiting part located on one side of the spline part close to the driving shaft (11) and having an outer diameter greater than that of the spline part.

3. The synchronizer shift fork durability test device according to claim 2, wherein: an end surface of the spline part away from the limiting part is provided with a pressing block (13), and a projection of the end surface on the pressing block (13) is located in the pressing block (13).

4. The synchronizer shift fork durability test device of claim 1, wherein, The linear driving assembly (20) comprises: a moving shaft (21) on which the shift fork (1) is sleeved and fixed; a first driving member (22) whose driving end is connected with the moving shaft (21) through a transition piece.

5. The synchronizer shift fork durability test device of claim 4, wherein, The transition piece comprises: a sliding shaft (23) oppositely arranged at one end of the first driving member (22); a transition connecting block (24) one end of which is connected with one end of the sliding shaft (23) away from the first driving member (22), and the other end of which is connected with the moving shaft (21).

6. The synchronizer shift fork durability test device according to claim 5, wherein: one end of the sliding shaft (23) toward the first driving member (22) is connected with a pressure sensor (28).

7. The synchronizer shift fork durability test device of claim 4, wherein: The device further comprises a box body (30), the moving shaft (21) and the synchronizer assembly are located in the box body (30), the transition piece is arranged through a first side wall (31) of the box body (30), the driving shaft (11) is arranged through a second side wall (32) of the box body (30), and the first side wall (31) and the second side wall (32) are oppositely arranged.

8. The synchronizer shift fork durability test device of claim 7, wherein: One end of the moving shaft (21) away from the transition piece is movably inserted into a first positioning block (25), and the first positioning block (25) is fixed to the second side wall (32) through a second positioning block (26); waist-shaped holes are formed in the first positioning block (25) and the second positioning block (26), the two waist-shaped holes are perpendicular to each other, and the first positioning block (25) and the second positioning block (26) are connected through fasteners.

9. The synchronizer shift fork durability test device of claim 8, wherein: A limiting ring (27) is sleeved on one side of the moving shaft (21) close to the first positioning block (25).

10. The synchronizer shift fork durability test device of claim 7, wherein: An oil pipe (40) is arranged through a side wall of the box body (30), and an oil outlet hole is arranged at the bottom of the box body (30); one end of the oil pipe (40) located outside the box body (30) is connected with an oil tank, and the other end of the oil pipe (40) located inside the box body (30) is located above the synchronizer assembly.

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