A kind of CVT gearbox driving wheel oil pressure test tooling

Abstract

The utility model belongs to tooling technical field, concretely relates to a CVT gearbox driving wheel oil pressure test frock, include: the assembly sleeve seat, the bearing is installed in the assembly sleeve seat, and is locked and fixed through the locking nut, the end cover is set up in the assembly sleeve seat top mouth portion through the screw buckle cover, and the end cover top middle part is provided with the screw cylinder, and the end cover bottom middle part is provided with the butt joint pipe, the screw cylinder is through with butt joint pipe inner cavity, and the screw cylinder circumferential wall is provided with the oil inlet pipe, and the oil inlet pipe is through with butt joint pipe inner cavity, the oil pipe stem is set up in the screw cylinder and butt joint pipe inside through the screw connection, and the oil pipe stem is the ladder pole and bottom closed, and the oil pipe stem smooth rod part outer diameter is less than butt joint pipe inner tube diameter, and the oil pipe stem bottom circumferential side is provided with the oil outlet hole, is used to solve in the test because of lacking some auxiliary frock, leads to in the test when adopting the oil pressure leak detection machine, needs to separate the corresponding part test, cannot carry out the test simultaneously, leads to the problem of low test efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of tooling technology, specifically relating to a CVT transmission drive wheel oil pressure testing tooling. Background Technology

[0002] The CVT transmission drive pulley, also known as the primary pulley or drive pulley, is the core component of the CVT (Continuously Variable Transmission) system that is directly connected to the engine crankshaft. Its main function is to receive and transmit power from the engine and achieve continuously variable transmission by changing its effective diameter.

[0003] like Figure 1-2 The CVT transmission drive wheel shown has a main structure including a drive shaft. One end of the drive shaft has a threaded section on its peripheral wall and a three-tiered oil injection hole inside. A drive pulley fixing plate is fixedly installed on the outer peripheral wall near the threaded section. A drive pulley moving plate and a drive wheel cylinder are installed on the drive shaft below the drive pulley fixing plate. The upper inner wall of the oil injection hole is connected to the inner cavity of the drive wheel cylinder through an oil inlet hole. A clutch is installed at the cylinder port of the drive wheel cylinder. The middle inner wall of the oil injection hole is connected to the oil chamber of the clutch through an oil inlet hole.

[0004] Before the CVT transmission drive wheel is assembled and shipped, the pressure of the drive wheel cylinder and the pressure of the clutch oil chamber need to be tested. However, due to the lack of some auxiliary tools, when using an oil pressure leak tester, the corresponding parts need to be tested separately and cannot be tested simultaneously, resulting in low testing efficiency. Utility Model Content

[0005] Based on the problems mentioned in the background technology above, this utility model provides a CVT transmission drive wheel hydraulic pressure testing fixture to solve the problem that when using a hydraulic leak tester, the corresponding parts need to be tested separately and cannot be tested simultaneously due to the lack of some auxiliary fixtures, resulting in low testing efficiency.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A CVT transmission drive wheel hydraulic pressure testing fixture includes:

[0008] An assembly sleeve is provided, in which a bearing is fitted and secured by a locking nut.

[0009] An end cap is provided at the top opening of the assembly sleeve by means of a screw fastener. A screw cylinder is provided at the top center of the end cap, and a connecting pipe is provided at the bottom center of the end cap. The screw cylinder communicates with the inner cavity of the connecting pipe. An oil inlet pipe is provided on the peripheral side wall of the screw cylinder, and the oil inlet pipe communicates with the inner cavity of the connecting pipe.

[0010] An oil delivery pipe rod is installed inside the screw barrel and the connecting pipe via a threaded connection. The oil delivery pipe rod is a stepped rod with a closed bottom. The outer diameter of the smooth part of the oil delivery pipe rod is smaller than the inner diameter of the connecting pipe. An oil outlet hole is provided on the bottom periphery of the oil delivery pipe rod.

[0011] Based on the above technical solution, the present invention has made the following improvements:

[0012] Furthermore, the inner peripheral wall of the assembly sleeve is provided with a support flange, the bearing is supported on the top of the support flange, and the locking nut is located on the top of the bearing.

[0013] Furthermore, the top wall of the assembly sleeve is provided with multiple connecting screw holes one, and the end cover is provided with multiple connecting screw holes two. Each of the connecting screw holes one and connecting screw holes two at the corresponding positions is screwed into. The bottom peripheral wall of the connecting tube is provided with a thrust ring through a sealing groove.

[0014] Furthermore, the top of the oil pipeline rod is fixedly provided with a threaded body, a fixed cap and a pipe head from bottom to top. The inner cavity of the pipe head is connected to the inner cavity of the oil pipeline rod. The threaded body is screwed into the screw cylinder. The stepped part of the oil pipeline rod is connected by a tapered section one. The bottom of the oil pipeline rod is provided with a tapered section two.

[0015] Furthermore, both the first and second conical portions have rubber layers on their peripheral walls.

[0016] Furthermore, a sealing gasket is provided at the bottom of the fixing cover.

[0017] Furthermore, the shape and structure of the oil delivery pipe rod are adapted to the shape and structure of the inner pipe wall of the drive shaft, and the outer diameter of the upper large pipe rod is smaller than the diameter of the upper large inner pipe wall of the drive shaft, while the outer diameter of the lower small pipe rod is smaller than the diameter of the middle inner pipe wall of the drive shaft but larger than the diameter of the lower small inner pipe wall of the drive shaft.

[0018] The beneficial effects of this utility model are:

[0019] By assembling this tooling onto the threaded end of the drive shaft of the CVT transmission drive wheel, the connecting pipe is inserted into the oil injection hole, and the outer circumference of the thrust ring on the connecting pipe's peripheral wall is tightly fitted against the inner wall of the oil injection hole. Then, the oil supply pipe rod is extended into the oil injection hole, with cone one tightly against cone wall one and cone two tightly against cone wall two, causing the upper large hole and the middle hole of the oil injection hole to be sealed. At this point, hydraulic oil pipe one from the hydraulic leak tester is connected to the oil inlet pipe, and hydraulic oil pipe two from the hydraulic leak tester is connected to the pipe end. Hydraulic oil is then simultaneously injected into the oil inlet pipe and the pipe end. The hydraulic oil injected from the oil inlet pipe enters the upper large hole cavity of the oil injection hole, and then enters the drive wheel cylinder through oil inlet one. In the inner cavity, hydraulic oil injected from the pipe head enters the oil supply pipe rod, then enters the middle hole cavity of the oil injection hole from the oil outlet, and finally enters the oil chamber of the clutch through the second oil inlet. During the continuous injection of hydraulic oil into the inner cavity of the drive wheel cylinder and the clutch oil chamber, the oil pressure value of the hydraulic oil injected into the inner cavity of the drive wheel cylinder and the clutch oil chamber can be obtained by observing the oil pressure display bar on the oil pressure leak tester. When the injected oil pressure value has not reached the preset value, oil leakage occurs at the sealing ring 1, sealing ring 2, thrust ring, and cover, which indicates that the sealing performance of sealing ring 1, sealing ring 2, thrust ring, and cover is not up to standard, thereby realizing the simultaneous pressure sealing test of multiple parts. Attached Figure Description

[0020] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0021] Figure 1 This is a structural diagram of the CVT transmission drive wheel described in the background section;

[0022] Figure 2 This is a cross-sectional view of the drive wheel of the CVT transmission described in the background art;

[0023] Figure 3 This is a structural diagram of a CVT transmission drive wheel hydraulic pressure testing fixture according to the present invention;

[0024] Figure 4 This is an exploded view of a CVT transmission drive wheel hydraulic pressure testing fixture according to the present invention;

[0025] Figure 5 This is an exploded view of the end cover of the CVT transmission drive wheel hydraulic pressure testing fixture of this utility model;

[0026] Figure 6 This is a diagram showing the usage status of a CVT transmission drive wheel hydraulic pressure testing fixture according to this utility model;

[0027] Figure 7 This is a cross-sectional view of the CVT transmission drive wheel hydraulic pressure testing fixture in use according to this utility model.

[0028] The attached diagram is labeled as follows:

[0029] 101. Assembly sleeve; 102. Support flange; 103. Connecting screw hole one; 201. Bearing; 301. Locking nut; 401. End cap; 402. Connecting screw hole two; 403. Screw; 404. Screw barrel; 405. Connecting pipe; 406. Sealing groove; 407. Thrust ring; 408. Oil inlet pipe; 501. Oil delivery pipe rod; 502. Threaded body; 503. Fixing cap; 504. Pipe head; 505. Taper one; 506. Taper two; 507. Oil outlet hole; 508. Sealing gasket. Detailed Implementation

[0030] like Figures 1 to 7 As shown, a CVT transmission drive wheel hydraulic pressure testing fixture includes:

[0031] Assemble the sleeve 101. The inner peripheral wall of the assembly sleeve 101 is provided with a support flange 102. During assembly, the bearing 201 is placed on the top of the support flange 102 so that the bearing 201 is snapped into the assembly sleeve 101. Then, the bearing 201 is fitted onto the threaded end shaft of the drive shaft in the CVT gearbox drive wheel. Then, the locking nut 301 is screwed into the threaded part so that it is pressed against the top of the bearing 201, so that the assembly sleeve 101 is assembled onto the threaded end shaft of the drive shaft.

[0032] The end cover 401 has multiple connecting screw holes 402 arranged in an array on its surface. The top wall of the assembly sleeve 101 has multiple connecting screw holes 103 arranged in an array on its surface. Screws 403 are screwed into each connecting screw hole 103 and connecting screw hole 402 at the corresponding positions. When the assembly sleeve 101 is assembled on the threaded end of the drive shaft, the end cover 401 is fastened to the top opening of the assembly sleeve 101 by screwing screws 403 into each connecting screw hole 103 and connecting screw hole 402 at the corresponding positions.

[0033] A screw barrel 404 is provided at the top center of the end cap 401, and a connecting pipe 405 is provided at the bottom center of the end cap 401. A thrust ring 407 is provided on the bottom peripheral wall of the connecting pipe 405 through a sealing groove 406. The connecting pipe 405 is connected to the oil injection hole, and the thrust ring 407 can enhance the sealing between the outer peripheral wall of the connecting pipe 405 and the wall of the oil injection hole. The screw barrel 404 communicates with the inner cavity of the connecting pipe 405, and an oil inlet pipe 408 is provided on the peripheral side wall of the screw barrel 404. The oil inlet pipe 408 communicates with the inner cavity of the connecting pipe 405.

[0034] The oil delivery pipe rod 501 has a threaded body 502, a fixing cap 503, and a pipe head 504 fixedly installed on its top from bottom to top. The inner cavity of the pipe head 504 is in communication with the inner cavity of the oil delivery pipe rod 501. The oil delivery pipe rod 501 is a stepped rod and its bottom is closed. When the assembly sleeve 101 is assembled on the threaded end shaft of the drive shaft and the end cap 401 is fastened to the top opening of the assembly sleeve 101 by screws 403, the oil delivery pipe rod 501 is inserted into the screw cylinder 404 and the oil injection hole of the drive shaft, so that the threaded body 502 is screwed into the screw cylinder 404, thereby stabilizing the oil delivery pipe rod 501 and keeping it inserted into the oil injection hole of the drive shaft.

[0035] The stepped section of the oil supply pipe rod 501 is connected by a tapered section 505. The bottom of the oil supply pipe rod 501 is provided with a tapered section 506. The shape and structure of the oil supply pipe rod 501 are adapted to the shape and structure of the inner wall of the oil injection hole of the drive shaft. When the oil supply pipe rod 501 is inserted into the oil injection hole of the drive shaft, the tapered section 505 of the oil supply pipe rod 501 is tightly attached to the tapered wall 1 of the oil injection hole, and the tapered section 506 of the oil supply pipe rod 501 is tightly attached to the tapered wall 2 of the oil injection hole.

[0036] The outer diameter of the smooth rod of the oil delivery pipe 501 is smaller than the inner diameter of the connecting pipe 405. The outer diameter of the upper large pipe of the oil delivery pipe 501 is smaller than the diameter of the upper large inner pipe wall of the drive shaft. The outer diameter of the lower small pipe of the oil delivery pipe 501 is smaller than the diameter of the middle inner pipe wall of the drive shaft but larger than the diameter of the lower small inner pipe wall of the drive shaft. An oil outlet hole 507 is provided on the bottom periphery of the oil delivery pipe 501. When the first tapered part 505 of the oil delivery pipe 501 is tightly attached to the first tapered wall of the oil injection hole, and the second tapered part 506 of the oil delivery pipe 501 is tightly attached to the second tapered wall of the oil injection hole, the upper large hole area and the middle hole area of ​​the oil injection hole are isolated and closed. At the same time, the oil outlet hole 507 is also located in the middle hole area of ​​the oil injection hole.

[0037] At this time, by connecting hydraulic oil pipe one of the hydraulic leak tester to the oil inlet pipe 408 and hydraulic oil pipe two of the hydraulic leak tester to the pipe head 504, hydraulic oil is simultaneously injected into the oil inlet pipe 408 and the pipe head 504. The hydraulic oil injected from the oil inlet pipe 408 enters the upper large cavity of the oil injection hole, and then enters the inner cavity of the drive wheel cylinder through the oil inlet hole one; the hydraulic oil injected from the pipe head 504 enters the oil delivery pipe rod 501 and then enters the middle cavity of the oil injection hole through the oil outlet hole 507, and finally enters the oil cavity of the clutch through the oil inlet hole two; as hydraulic oil is continuously injected into the inner cavity of the drive wheel cylinder, During the clutch oil chamber test, the oil pressure display on the oil pressure leak tester is used to observe the oil pressure value of the hydraulic oil injected into the inner cavity of the drive wheel cylinder and the clutch oil chamber. When the injected oil pressure value has not reached the preset value, oil leakage occurs at the sealing ring 1, sealing ring 2, thrust ring 407, and cover. This indicates that the sealing performance of sealing ring 1, sealing ring 2, thrust ring 407, and cover is substandard, requiring adjustment and maintenance. Ultimately, this allows for simultaneous pressure sealing testing of multiple parts, including the inner cavity of the drive wheel cylinder, the clutch oil chamber, and thrust ring 407, improving testing efficiency.

[0038] Both cone 1 (505) and cone 2 (506) have rubber layers on their peripheral walls, which enhance the sealing performance of cone 1 (505) and cone wall 1, and cone 2 (506) and cone wall 2.

[0039] A sealing gasket 508 is provided at the bottom of the fixed cover 503, which can enhance the sealing between the bottom of the fixed cover 503 and the top of the screw barrel 404.

[0040] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A CVT transmission drive wheel hydraulic pressure testing fixture, characterized in that: include: Assembly sleeve (101), wherein a bearing (201) is fitted inside the assembly sleeve (101) and locked in place by a locking nut (301); End cap (401), the end cap (401) is fastened to the top opening of the assembly sleeve (101) by screws (403), a screw cylinder (404) is provided in the middle of the top of the end cap (401), a connecting pipe (405) is provided in the middle of the bottom of the end cap (401), the screw cylinder (404) and the inner cavity of the connecting pipe (405) are connected, and an oil inlet pipe (408) is provided on the peripheral side wall of the screw cylinder (404), the oil inlet pipe (408) and the inner cavity of the connecting pipe (405) are connected; Oil delivery pipe rod (501) is installed inside the screw barrel (404) and the connecting pipe (405) by threaded connection. The oil delivery pipe rod (501) is a stepped rod and closed at the bottom. The outer diameter of the smooth part of the oil delivery pipe rod (501) is smaller than the inner diameter of the connecting pipe (405). An oil outlet hole (507) is provided on the bottom periphery of the oil delivery pipe rod (501).

2. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The inner peripheral wall of the assembly sleeve (101) is provided with a support flange (102), the bearing (201) is placed on the top of the support flange (102), and the locking nut (301) is located on the top of the bearing (201).

3. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The top wall of the assembly sleeve (101) is provided with a plurality of connecting screw holes 1 (103), and the end cap (401) is provided with a plurality of connecting screw holes 2 (402). Each of the connecting screw holes 1 (103) and connecting screw holes 2 (402) is screwed with a screw (403). The bottom peripheral wall of the connecting pipe (405) is provided with a thrust ring (407) through a sealing groove (406).

4. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The top of the oil pipeline rod (501) is fixedly provided with a threaded body (502), a fixing cap (503) and a pipe head (504) from bottom to top. The inner cavity of the pipe head (504) is connected to the inner cavity of the oil pipeline rod (501). The threaded body (502) is screwed into the screw cylinder (404). The stepped part of the oil pipeline rod (501) is connected by a tapered part one (505). The bottom of the oil pipeline rod (501) is provided with a tapered part two (506).

5. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 4, characterized in that: Both cone part one (505) and cone part two (506) have rubber layers on their peripheral walls.

6. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 4, characterized in that: A sealing gasket (508) is provided at the bottom of the fixed cover (503).

7. The CVT transmission drive wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The shape and structure of the oil delivery pipe rod (501) are adapted to the shape and structure of the inner pipe wall of the drive shaft. The outer diameter of the upper large pipe rod of the oil delivery pipe rod (501) is smaller than the diameter of the upper large inner pipe wall of the drive shaft, and the outer diameter of the lower small pipe rod of the oil delivery pipe rod (501) is smaller than the diameter of the middle inner pipe wall of the drive shaft but larger than the diameter of the lower small inner pipe wall of the drive shaft.

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