A cvt gearbox driven wheel oil pressure test fixture

Abstract

The utility model belongs to tooling technical field, concretely relates to a CVT gearbox driven wheel oil pressure test tooling, include: mounting sleeve seat, the inner bottom of mounting sleeve seat is provided with the bearing ring, ball bearing, ball bearing is installed in mounting sleeve seat, and ball bearing outer ring rests in bearing ring, locking nut, locking nut is located ball bearing top, seat cover, seat cover buckling in mounting sleeve seat top mouth department, and through connecting structure with mounting sleeve seat carry out firm assembly, seat cover top center is provided with the oil filler pipe, seat cover bottom center is provided with the butt joint pipe, the oil filler pipe is through -going with butt joint pipe, and the bottom peripheral wall of butt joint pipe is provided with sealing ring through the clamping structure, is used to solve the problem that the oil pressure test is not accurate when adopting the oil pressure leak detection machine to carry out the oil pressure test to driven wheel hydraulic cylinder, leads to the inaccuracy of oil pressure test when testing because of lacking some auxiliary tooling, also can not test the sealing property of sealing ring.

Description

Technical Field

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

[0002] The driven pulley, also known as the secondary pulley or output pulley, is one of the core actuators of a CVT transmission. It appears in pairs with the driving pulley (primary pulley) and works together to achieve continuously variable transmission by continuously changing its working diameter, thus replacing the complex gear set in a traditional transmission.

[0003] As attached Figure 1-2 The CVT transmission driven pulley shown mainly comprises a driven shaft, which is a stepped shaft with a blind oil filling hole at the top center and connecting threads on the top peripheral wall. A driven pulley fixing disc is mounted on the lower end of the driven shaft. A gear is mounted on the driven shaft below the fixed disc. A movable driven pulley disc is mounted on the driven shaft above the fixed disc. A driven pulley hydraulic cylinder is fixedly mounted on the top of the movable driven pulley disc, and the hydraulic cylinder is mounted on the driven shaft with an open top. The central hole wall of the hydraulic cylinder is flush with the shaft wall. A sealing ring is provided between the outer peripheral wall of the driven shaft and the inner sleeve of the driven wheel hydraulic cylinder. The sealing ring, the inner sleeve of the driven wheel hydraulic cylinder, and the peripheral side wall of the driven shaft are all provided with corresponding oil inlet holes. The oil inlet holes are connected to the oil filling blind holes. The top of the driven wheel hydraulic cylinder is covered with a hydraulic cylinder cover. A sealing ring one is provided between the outer peripheral wall of the hydraulic cylinder cover and the inner wall of the outer sleeve of the driven wheel hydraulic cylinder. A return spring is provided between the bottom of the hydraulic cylinder cover and the inner bottom of the driven wheel hydraulic cylinder. A sleeve neck is provided at the top of the hydraulic cylinder cover. The sleeve neck is fitted onto the inner sleeve of the driven wheel hydraulic cylinder. A sealing ring two is provided between the inner peripheral wall of the sleeve neck and the outer peripheral wall of the inner sleeve of the driven wheel hydraulic cylinder.

[0004] Before the CVT transmission driven wheel is assembled and shipped, hydraulic oil needs to be injected through the oil filling blind hole, so that the hydraulic oil enters the driven wheel hydraulic cylinder from the oil inlet hole, causing the driven wheel hydraulic cylinder to be filled with hydraulic oil for use. Since the driven wheel hydraulic cylinder needs to be filled with hydraulic oil, it is also necessary to perform oil pressure side leakage test on the driven wheel hydraulic cylinder before leaving the factory. Nowadays, oil pressure leak testers are often used to perform oil pressure side leakage test on the driven wheel hydraulic cylinder. However, due to the lack of some auxiliary tooling, the oil pressure test is inaccurate when using oil pressure leak testers, and the sealing performance of the seals cannot be tested. Utility Model Content

[0005] Based on the problems mentioned in the background technology above, this utility model provides a CVT transmission driven wheel hydraulic pressure testing fixture to solve the problem that when using a hydraulic leak tester to test the hydraulic cylinder of the driven wheel, the hydraulic pressure test is inaccurate due to the lack of some auxiliary fixtures, and the sealing performance of the sealing ring cannot be tested.

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

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

[0008] The mounting sleeve has a bearing ring at its inner bottom;

[0009] A ball bearing, wherein the ball bearing is fitted into a mounting sleeve and the outer ring of the ball bearing rests on a bearing ring;

[0010] A locking nut, which is located on top of the ball bearing;

[0011] A cover is attached to the top opening of the mounting sleeve and is securely assembled with the mounting sleeve via a connecting structure.

[0012] A refueling pipe is provided at the center of the top of the seat cover, and a connecting pipe is provided at the center of the bottom of the seat cover. The refueling pipe and the connecting pipe are connected, and a sealing ring is provided on the bottom peripheral wall of the connecting pipe through a snap-fit ​​structure.

[0013] Based on the above technical solution, the present invention has made the following improvements:

[0014] Furthermore, the connecting structure includes bosses and protrusions, and multiple bosses and protrusions are provided, with corresponding numbers and positions. Each array of bosses is provided on the peripheral sidewall of the mounting sleeve, and each array of protrusions is provided on the peripheral sidewall of the cover. Each boss is provided with a screw hole, and each protrusion is provided with a light hole. Each screw hole and each light hole are positioned correspondingly, and a connecting screw is screwed into both the screw hole and the light hole.

[0015] Furthermore, the snap-fit ​​structure includes a sealing groove, which is disposed on the bottom peripheral wall of the connecting pipe. A positioning groove is provided on the sealing groove, and a positioning block is provided on the inner peripheral wall of the sealing ring. The sealing ring is snapped into the sealing groove, and the positioning block is snapped into the positioning groove.

[0016] Furthermore, the inner diameter of the mounting sleeve is the same as the outer diameter of the ball bearing outer ring, and a flange ring is provided at the bottom of the seat cover, with the bottom of the flange ring fitting against the top of the ball bearing outer ring.

[0017] Furthermore, the sealing ring is made of rubber, and the outer diameter of the sealing ring is adapted to the diameter of the oil injection blind hole on the driven shaft.

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

[0019] The system comprises a mounting sleeve, ball bearing, lock nut, seat cover, connecting structure, oil filling pipe, connecting pipe, and snap-fit ​​structure. During use, the ball bearing is placed in the mounting sleeve, then the inner ring of the ball bearing is fitted onto the driven shaft, with the bottom of the inner ring resting on the stepped platform of the driven shaft. The lock nut is then screwed into the connecting thread of the driven shaft, pressing the bottom of the lock nut against the top of the inner ring of the ball bearing. The sealing ring to be tested is then fitted onto the bottom circumferential side wall of the connecting pipe using the snap-fit ​​structure. Finally, the seat cover is placed on top of the mounting sleeve, allowing the connecting pipe and sealing ring to extend into the oil filling pipe. The mounting sleeve and seat cover are then assembled using the connecting structure. After assembly, the oil pressure leak tester... The oil pipe is connected to the filler pipe, allowing hydraulic oil to be introduced through the filler pipe. This hydraulic oil is then injected into the driven wheel hydraulic cylinder through the blind filler hole and the inlet hole. During the continuous injection of hydraulic oil, the oil pressure display on the oil pressure leak tester shows the oil pressure value injected into the driven wheel hydraulic cylinder. If the injected oil pressure does not reach the preset value, oil leakage occurs at seal ring one, seal ring two, and the seal ring itself. This indicates that the sealing performance of seal ring one, seal ring two, and the seal ring is substandard, requiring adjustment or replacement. Therefore, by using this fixture, not only can the oil pressure of the driven wheel hydraulic cylinder be accurately tested, but the sealing performance of each seal ring can also be tested. 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 driven wheel of the CVT transmission described in the background section.

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

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

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

[0025] Figure 5 This is an exploded view of some components in a CVT transmission driven wheel hydraulic pressure testing fixture of this utility model;

[0026] Figure 6 This is a cross-sectional view of the CVT transmission driven wheel hydraulic pressure testing fixture in its usage state according to this utility model;

[0027] Figure 7 This is a diagram showing the usage state of a CVT transmission driven wheel hydraulic pressure testing fixture according to this utility model;

[0028] Figure 8 This is a structural diagram of a hydraulic leak detector.

[0029] The attached diagram is labeled as follows:

[0030] 101. Mounting sleeve; 102. Bearing ring; 103. Boss; 104. Screw hole; 201. Ball bearing; 301. Locking nut; 401. Seat cover; 402. Flange ring; 403. Protrusion; 404. Smooth hole; 405. Connecting screw; 406. Oil filling pipe; 407. Connecting pipe; 408. Sealing groove; 409. Positioning groove; 501. Sealing ring; 502. Positioning block. Detailed Implementation

[0031] like Figures 1 to 8 As shown, a CVT transmission driven wheel hydraulic pressure testing fixture includes:

[0032] Mounting sleeve 101, with a bearing ring 102 provided at the inner bottom of mounting sleeve 101;

[0033] Ball bearing 201 is fitted inside mounting sleeve 101. The outer diameter of the outer ring of ball bearing 201 is the same as the inner diameter of the mounting sleeve 101, and the outer ring of ball bearing 201 rests on bearing ring 102.

[0034] Locking nut 301 is located on top of ball bearing 201;

[0035] Seat cover 401 is attached to the top opening of mounting sleeve 101. A flange ring 402 is provided at the bottom of seat cover 401. The outer diameter of flange ring 402 is the same as the inner diameter of mounting sleeve 101. When seat cover 401 is attached to the top opening of mounting sleeve 101, the bottom of flange ring 402 is in contact with the top of outer ring of ball bearing 201.

[0036] After the cover 401 is attached to the top opening of the mounting sleeve 101, it is securely assembled with the mounting sleeve 101 through a connecting structure. The connecting structure includes bosses 103 and protrusions 403. Multiple bosses 103 and protrusions 403 are provided, and their number and position correspond. Each boss 103 is arranged in an array on the peripheral sidewall of the mounting sleeve 101, and each protrusion 403 is arranged in an array on the peripheral sidewall of the cover 401. Each boss 103 has a screw hole 104, and each protrusion 403 has... A light hole 404 is provided, and each screw hole 104 corresponds to the position of each light hole 404. A connecting screw 405 is screwed into the corresponding screw hole 104 and the light hole 404. After the cover 401 is fastened on the top opening of the mounting sleeve 101, each connecting screw 405 is screwed into the corresponding screw hole 104 and the light hole 404, so that the screw head of the connecting screw 405 is pressed against the top wall of the protrusion 403, thereby realizing the stable assembly of the cover 401 and the mounting sleeve 101.

[0037] A filler pipe 406 is located at the center of the top of the cover 401. The opening of the filler pipe 406 is connected to the oil pipe of the hydraulic leak tester. The hydraulic leak tester uses hydraulic oil as the medium for injection and has a hydraulic oil injection pressure display area on its body. The body is equipped with oil pipes. A connecting pipe 407 is located at the center of the bottom of the cover 401. The filler pipe 406 and the connecting pipe 407 are interconnected. A sealing ring 501 is provided on the bottom peripheral wall of the connecting pipe 407 through a snap-fit ​​structure. The snap-fit ​​structure includes a sealing groove 408, which is located on the bottom peripheral wall of the connecting pipe 407. A positioning groove 409 is provided on the sealing groove 408. The inner circumferential wall of the sealing ring 501 is provided with a positioning block 502. During assembly, the sealing ring 501 is snapped into the sealing groove 408, and the positioning block 502 is snapped into the positioning groove 409 to limit and stabilize the sealing ring 501 in the sealing groove 408. The sealing ring 501 is made of rubber, and the outer circumferential diameter of the sealing ring 501 is adapted to the diameter of the oil filling blind hole on the driven shaft so that after the connecting pipe 407 is inserted into the oil filling blind hole of the driven shaft, the outer circumferential wall of the sealing ring 501 can fit tightly with the wall of the oil filling blind hole of the driven shaft. The sealing ring 501 is a product that comes with the driven wheel of the CVT transmission.

[0038] In use, the ball bearing 201 is placed into the mounting sleeve 101, the inner ring of the ball bearing 201 is then fitted onto the driven shaft, and the bottom of the inner ring of the ball bearing 201 rests on the stepped platform of the driven shaft. The locking nut 301 is then screwed into the connecting thread of the driven shaft, so that the bottom of the locking nut 301 presses against the top of the inner ring of the ball bearing 201 to limit the vertical movement of the ball bearing 201.

[0039] Then, the sealing ring 501 to be tested is clamped in the sealing groove 408, and the positioning block 502 is clamped in the positioning groove 409, so that the sealing ring 501 is assembled on the bottom periphery of the connecting pipe 407. Then, the seat cover 401 is fastened on the top of the mounting sleeve 101, so that the connecting pipe 407 and the sealing ring 501 extend into the oil filling blind hole, so that the outer peripheral wall of the sealing ring 501 is tightly fitted with the wall of the oil filling blind hole of the driven shaft. Finally, each connecting screw 405 is screwed into the corresponding screw hole 104 and the smooth hole 404, so that the screw head of the connecting screw 405 is pressed against the top wall of the protrusion 403, thereby realizing the stable assembly of the seat cover 401 and the mounting sleeve 101, so that the tooling is kept installed at the top opening of the driven shaft.

[0040] After installing this fixture on the top of the driven shaft, connect the oil pipe in the hydraulic leak tester to the filling pipe 406, then start the oil pump in the hydraulic leak tester to pump hydraulic oil into the oil pipe, so that the hydraulic oil is introduced into the filling pipe 406. Then, the hydraulic oil is injected into the driven wheel hydraulic cylinder through the oil injection blind hole and the oil inlet hole. During the continuous injection of hydraulic oil, observe the oil pressure display on the hydraulic leak tester to know the oil pressure value of the hydraulic oil injected into the driven wheel hydraulic cylinder. When the injected oil pressure value reaches the preset value, press the oil pump stop button in the hydraulic leak tester to stop the oil injection. At this time, if the pressure is low... No oil leakage was observed at sealing ring 1, sealing ring 2, and sealing ring 501, indicating that the sealing performance met the standard. However, if oil leakage occurred at sealing ring 1, sealing ring 2, and sealing ring 501 before the injected oil pressure reached the preset value, it indicated that the sealing performance of sealing ring 1, sealing ring 2, and sealing ring 501 was substandard, and they needed to be readjusted or replaced. Therefore, by using an oil pressure leak tester in conjunction with this tooling, not only can the oil pressure of the driven wheel hydraulic cylinder be accurately tested, but the sealing performance of each sealing ring can also be tested.

[0041] 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 hydraulic pressure testing fixture for a CVT transmission driven wheel, characterized in that: include: Mounting sleeve (101), the inner bottom of which is provided with a bearing ring (102); A ball bearing (201) is fitted inside a mounting sleeve (101), and the outer ring of the ball bearing (201) rests on a bearing ring (102). A locking nut (301) is located on top of the ball bearing (201); A cover (401) is attached to the top opening of the mounting sleeve (101) and is securely assembled with the mounting sleeve (101) through a connecting structure. A refueling pipe (406) is provided at the top center of the seat cover (401), and a connecting pipe (407) is provided at the bottom center of the seat cover (401). The refueling pipe (406) and the connecting pipe (407) are connected. A sealing ring (501) is provided on the bottom peripheral wall of the connecting pipe (407) through a snap-fit ​​structure.

2. The CVT transmission driven wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The connecting structure includes bosses (103) and protrusions (403). Multiple bosses (103) and protrusions (403) are provided, and their number and position are corresponding. Each boss (103) array is arranged on the peripheral sidewall of the mounting sleeve (101), and each protrusion (403) array is arranged on the peripheral sidewall of the cover (401). Each boss (103) is provided with a screw hole (104), and each protrusion (403) is provided with a light hole (404). Each screw hole (104) and each light hole (404) are positioned correspondingly. A connecting screw (405) is screwed into both the screw hole (104) and the light hole (404) at the corresponding positions.

3. The CVT transmission driven wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The snap-fit ​​structure includes a sealing groove (408), which is provided on the bottom peripheral wall of the connecting pipe (407). A positioning groove (409) is provided on the sealing groove (408). A positioning block (502) is provided on the inner peripheral wall of the sealing ring (501). The sealing ring (501) is snapped in the sealing groove (408), and the positioning block (502) is snapped in the positioning groove (409).

4. The CVT transmission driven wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The inner diameter of the mounting sleeve (101) is the same as the outer diameter of the outer ring of the ball bearing (201). A flange ring (402) is provided at the bottom of the seat cover (401), and the bottom of the flange ring (402) fits against the top of the outer ring of the ball bearing (201).

5. The CVT transmission driven wheel hydraulic pressure testing fixture according to claim 1, characterized in that: The sealing ring (501) is made of rubber, and the outer diameter of the sealing ring (501) is adapted to the diameter of the oil injection blind hole on the driven shaft.

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