Performance testing device for hydraulic parking brake cylinder

Abstract

The utility model discloses a hydraulic parking brake cylinder performance testing device, which relates to the technical field of hydraulic parking brake cylinders and comprises a testing closed box body, an oil drum and a hydraulic parking brake cylinder testing piece, the oil drum is arranged at the top end of the testing closed box body, and a high-pressure oil pump is arranged in the testing closed box body. A first oil pipe penetrating through the test closed box body and extending to the oil drum is installed at the input end of the high-pressure oil pump, a second oil pipe is installed at the output end of the high-pressure oil pump, a corrugated pipe is installed at one end of the second oil pipe, and a bottom plate is arranged at the bottom end in the test closed box body through a sliding groove; the hydraulic parking brake cylinder testing device has the advantages that when oil pressure is conveyed to 5.5 MPa, the push rod is in contact with the position of the pressure sensor, the position stroke of the push rod and the pressure sensor is 45, and the pressure sensor feeds back information to the single chip microcomputer.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic parking brake cylinder technical field, concretely is a kind of hydraulic parking brake cylinder performance testing device. BACKGROUND

[0002] Hydraulic parking brake cylinder is mainly to provide brake force for brake on the rotating shaft of loader, it can also be used in other occasions needing to convert oil pressure into mechanical push. Its working principle is mainly that, in brake state, high-pressure hydraulic oil is input to P mouth inlet, push rod moves to left, brake is formed, and loader is in parking state;In non-brake state, hydraulic oil is discharged from P mouth, under the action of spring force, push rod resets, and brake is released.

[0003] However, the authorized announcement No.CN 201240374Y discloses a kind of hydraulic parking brake cylinder, including energy storage cylinder body, brake spring, spring seat, hydraulic cylinder body, with the push rod of spring seat solid connection and the hydraulic piston assembly in the cavity of hydraulic cylinder body, the brake spring and spring seat are located in the cavity of energy storage cylinder body, the end of the push rod is in contact with hydraulic piston assembly, the hydraulic cylinder body is built into energy storage cylinder body, the hydraulic cylinder body is provided with the oil inlet hole of the center line level of the cavity of hydraulic cylinder body, the hydraulic parking brake cylinder of the utility model adopts such structure, compact structure, volume reduces, improve the sealing performance of product, reduce spare parts, reduce the weight of product, reduce cost, long time use still can keep good braking performance, prolong the service life of product.

[0004] The hydraulic parking brake cylinder of the utility model has the following problems in the process of use: it is inconvenient to accurately test the braking performance inside the hydraulic parking brake cylinder, in addition, the existing test environment cannot meet the protection and convenience requirements, so that the existing test device has low test efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of hydraulic parking brake cylinder performance testing device to solve the relevant problems in the above background.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic park brake cylinder performance testing device, including test closed box, oil drum and hydraulic park brake cylinder test piece, the top of test closed box is provided with oil drum, the inside of test closed box is provided with high-pressure oil pump, and first oil pipe that is installed with the high-pressure oil pump input end and extends to oil drum and penetrates test closed box, the output end of high-pressure oil pump is installed with second oil pipe, and one end of second oil pipe is installed with bellow, the bottom of the inside of test closed box is provided with bottom plate by sliding groove, and hydraulic park brake cylinder test piece is placed in the top of bottom plate, L nature fixing frame that is mutually engaged with the bolt of hydraulic park brake cylinder test piece is installed in the side of bottom plate, one side of hydraulic park brake cylinder test piece is provided with oil inlet pipe, the inside of hydraulic park brake cylinder test piece is provided with push rod, the top of test closed box is provided with single-chip microcomputer, the side of second oil pipe is provided with fixed mechanism for quickly connecting the outer wall of oil inlet pipe, the side plate of the top of test closed box is provided with recovery groove, the inner wall of recovery groove is provided with moving block by slide rail, and the inside of moving block is provided with rotating shaft by bearing, the outer wall of rotating shaft is provided with shielding door plate.

[0007] The hydraulic park brake cylinder performance testing device provided by the technical solution has a pressure sensor arranged on the inner side wall of the test closed box.

[0008] The hydraulic park brake cylinder performance testing device provided by the technical solution has a pressure sensor arranged on the inner side wall of the test closed box.

[0009] The hydraulic park brake cylinder performance testing device provided by the technical solution has a pressure sensor arranged on the inner side wall of the test closed box.

[0010] The hydraulic park brake cylinder performance testing device provided by the technical solution has a pressure sensor arranged on the inner side wall of the test closed box.

[0011] The hydraulic park brake cylinder performance testing device provided by the technical solution has a pressure sensor arranged on the inner side wall of the test closed box.

[0012] Compared with the prior art, the hydraulic park brake cylinder performance testing device provided by the utility model has the following beneficial effects:

[0013] 1. The utility model discloses a high -pressure oil pump is started to the oil tank inside fuel oil is transported from the oil inlet pipe place to the hydraulic parking brake cylinder test piece, and 4.5MPa oil pressure is input to the hydraulic parking brake cylinder test piece, and then push rod extends to the pressure sensor direction, when oil pressure is transported to 5.5MPa, push rod and pressure sensor position contact, then push rod and pressure sensor position stroke are 45, then pressure sensor will information feedback to singlechip, and the operator can know the braking performance of hydraulic parking brake cylinder test piece.

[0014] 2. The utility model discloses through push to the hydraulic parking brake cylinder test piece in test closed box body, connect the cover with the oil inlet pipe position alignment, then connect the cover and insert the oil inlet pipe outer wall, through extruding T type positioning rod and retracting to cross groove to spring extrusion, until T type positioning rod moves to the oil inlet pipe outer wall recess position, under the spring self elastic force drive T type positioning rod fixed oil inlet pipe outer wall, complete fixed connection.

[0015] 3. The utility model discloses through moving the shielding door board to the front side and turning over below the through -hole position, then fixed door bolt is inserted into the through -hole, can complete the protection step. ACCURACY OF DRAWINGS

[0016] Figure 1 It is the main view cross section structure schematic diagram of the utility model discloses;

[0017] Figure 2 It is the main view cross section structure schematic diagram of the utility model discloses; Figure 1 It is the A place enlarged structure schematic diagram of the utility model discloses;

[0018] Figure 3 It is the B place enlarged structure schematic diagram of the utility model discloses; Figure 1 It is the B place enlarged structure schematic diagram of the utility model discloses;

[0019] Figure 4 It is the main view structure schematic diagram of the utility model discloses;

[0020] Figure 5 It is the bottom plate and L sex fixed frame overhead structure schematic diagram of the utility model discloses.

[0021] In the drawing: 1, test closed box body;2, oil bucket;3, high -pressure oil pump;4, first oil pipe;5, second oil pipe;6, bellows;7, bottom plate;8, L sex fixed frame;9, hydraulic parking brake cylinder test piece;10, oil inlet pipe;11, push rod;12, pressure sensor;13, singlechip;14, recovery groove;15, rotating shaft;16, shielding door board;17, connecting cover;18, cross groove;19, T type positioning rod;20, spring;21, moving block. DETAILED DESCRIPTION

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1, such as Figures 1-2 As shown, this utility model provides a technical solution: a hydraulic parking brake cylinder performance testing device, including a test enclosure 1, an oil tank 2, and a hydraulic parking brake cylinder test piece 9. The oil tank 2 is located at the top of the test enclosure 1. A high-pressure oil pump 3 is installed inside the test enclosure 1. A first oil pipe 4, penetrating the test enclosure 1 and extending to the oil tank 2, is installed at the input end of the high-pressure oil pump 3. A second oil pipe 5 is installed at the output end of the high-pressure oil pump 3, and a corrugated pipe 6 is installed at one end of the second oil pipe 5. A base plate 7 is provided at the bottom of the test enclosure 1 via a sliding groove. The hydraulic parking brake cylinder test piece 9 is placed at the top of the base plate 7. An L-shaped fixing bracket 8, which engages with bolts on the hydraulic parking brake cylinder test piece 9, is installed on one side of the base plate 7. A section is opened on one side of the hydraulic parking brake cylinder test piece 9. The hydraulic parking brake cylinder test piece 9 is equipped with a push rod 11 inside the oil inlet pipe 10. A microcontroller 13 is installed at the top of the test enclosure 1, and a pressure sensor 12 is installed on the inner side wall of the test enclosure 1. An oil pressure gauge is installed inside the second oil pipe 5. By starting the high-pressure oil pump 3, fuel in the oil tank 2 is transported from the oil inlet pipe 10 to the hydraulic parking brake cylinder test piece 9, inputting an oil pressure of 4.5MPa to the hydraulic parking brake cylinder test piece 9. Then, the push rod 11 extends towards the pressure sensor 12. When the oil pressure is delivered to 5.5MPa, the push rod 11 contacts the pressure sensor 12. Since the stroke of the push rod 11 and the pressure sensor 12 is 45 degrees, the pressure sensor 12 feeds back the information to the microcontroller 13, and the operator can know the performance of the hydraulic parking brake cylinder test piece 9.

[0024] Example 2, as Figures 1-4 As shown, this utility model provides a technical solution: a hydraulic parking brake cylinder performance testing device, including a fixing mechanism on one side of the second oil pipe 5 for quick connection to the outer wall of the oil inlet pipe 10. The fixing mechanism includes a connecting cover 17 and a cross groove 18. A connecting cover 17 that fits against the oil inlet pipe 10 is installed on one side of the bellows pipe 6, and a cross groove 18 is opened inside the connecting cover 17. A T-shaped positioning rod 19 that is inserted into the outer wall of the oil inlet pipe 10 is provided inside the cross groove 18. A spring 20 that is fixed to the inner wall of the cross groove 18 is sleeved on the outer wall of the T-shaped positioning rod 19. By inserting the connecting cover 17 into the outer wall of the oil inlet pipe 10 and squeezing the T-shaped positioning rod 19 into the outer wall of the oil inlet pipe 10, the connecting cover 17 and the oil inlet pipe 10 are fixed, thus completing the connection.

[0025] Example 2, as Figures 1-5 As shown, this utility model provides a technical solution: a hydraulic parking brake cylinder performance testing device, including a recovery groove 14 on the side plate at the top of the test enclosure 1, a movable block 21 on the inner wall of the recovery groove 14 via a slide rail, and a rotating shaft 15 on the inside of the movable block 21 via a bearing, and a shielding door 16 on the outer wall of the rotating shaft 15. A through hole is provided on one side of the test enclosure 1, and a fixing bolt for inserting into the through hole is provided at the front end of the shielding door 16. The test requires a protective device, so the shielding door 16 is opened to drive the rotating shaft 15 to rotate at the movable block 21, thereby pushing the shielding door 16 to drive the movable block 21 to match the slide rail in the recovery groove 14, and then the shielding door 16 is recovered, which facilitates the connection and fixation of the hydraulic parking brake cylinder test piece 9.

[0026] Working principle: First, connect the external power supply. The operator can open the cover door 16 to drive the rotating shaft 15 to rotate at the moving block 21, thereby pushing the cover door 16 to match the moving block 21 in the recycling tank 14, and then retract the cover door 16 into the recycling tank 14. Next, the operator places the hydraulic parking brake cylinder test piece 9 above the base plate 7 and engages it with the side and front end of the L-shaped fixing bracket 8. Then, push the hydraulic parking brake cylinder test piece 9 into the test enclosure 1, align the connecting cover 17 with the oil inlet pipe 10, and then insert the connecting cover 17 into the outer wall of the oil inlet pipe 10. By squeezing the T-shaped positioning rod 19 back into the cross groove 18, the spring 20 is squeezed until the T-shaped positioning rod 19 moves to the groove position on the outer wall of the oil inlet pipe 10, and then the spring 20 is released from its own pressure. Under the action of the elastic force, the T-shaped positioning rod 19 is driven to fix the outer wall of the oil inlet pipe 10, completing the fixed connection. Then, the shielding door panel 16 is moved forward and flipped to the position of the lower through hole. Then, the fixing bolt is inserted into the through hole to complete the protection step. Finally, the operator starts the high-pressure oil pump 3 to transport the fuel in the oil tank 2 from the oil inlet pipe 10 to the hydraulic parking brake cylinder test piece 9, inputting 4.5MPa oil pressure to the hydraulic parking brake cylinder test piece 9. Then, the push rod 11 extends towards the pressure sensor 12. When the oil pressure is delivered to 5.5MPa, the push rod 11 contacts the pressure sensor 12. Since the stroke of the push rod 11 and the pressure sensor 12 is 45 degrees, the pressure sensor 12 feeds back the information to the microcontroller 13, and the operator can know the braking performance of the hydraulic parking brake cylinder test piece 9.

[0027] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A hydraulic parking brake cylinder performance testing device, comprising a test closed box (1), an oil tank (2) and a hydraulic parking brake cylinder test piece (9), characterized in that: The top end of the test closed box (1) is provided with an oil tank (2), the inside of the test closed box (1) is provided with a high-pressure oil pump (3), and the input end of the high-pressure oil pump (3) is provided with a first oil pipe (4) penetrating through the test closed box (1) and extending to the oil tank (2), the output end of the high-pressure oil pump (3) is provided with a second oil pipe (5), and one end of the second oil pipe (5) is provided with a bellows (6), the bottom end of the inside of the test closed box (1) is provided with a bottom plate (7) through a sliding groove, and the top end of the bottom plate (7) is placed with a hydraulic parking brake cylinder test piece (9), one side of the bottom plate (7) is provided with an L-shaped fixing frame (8) which is clamped with the bolt of the hydraulic parking brake cylinder test piece (9), one side of the hydraulic parking brake cylinder test piece (9) is provided with an oil inlet pipe (10), the inside of the hydraulic parking brake cylinder test piece (9) is provided with a push rod (11), the top end of the test closed box (1) is provided with a single-chip microcomputer (13), one side of the second oil pipe (5) is provided with a fixing mechanism for quickly connecting the outer wall of the oil inlet pipe (10), the side plate of the top end of the test closed box (1) is provided with a recovery groove (14), the inner wall of the recovery groove (14) is provided with a moving block (21) through a sliding rail, and the inside of the moving block (21) is provided with a rotating shaft (15) through a bearing, and the outer wall of the rotating shaft (15) is provided with a shielding door plate (16).

2. A hydraulic park brake cylinder performance testing device according to claim 1, characterized in that: The inside of the test closed box (1) is provided with a pressure sensor (12).

3. The hydraulic park brake cylinder performance testing device of claim 1, wherein: The fixing mechanism comprises a connecting cover (17) and a cross groove (18), one side of the bellows (6) is provided with a connecting cover (17) which is attached to the oil inlet pipe (10), and the inside of the connecting cover (17) is provided with a cross groove (18), the inside of the cross groove (18) is provided with a T-shaped positioning rod (19) which is inserted into the outer wall of the oil inlet pipe (10).

4. A hydraulic park brake cylinder performance testing device according to claim 3, characterized in that: The outer wall of the T-shaped positioning rod (19) is provided with a spring (20) which is fixed to the inner wall of the cross groove (18).

5. The hydraulic park brake cylinder performance testing device of claim 1, wherein: One side of the test closed box (1) is provided with a through hole, and the front end of the shielding door plate (16) is provided with a fixed bolt which is inserted into the through hole.

6. A hydraulic park brake cylinder performance testing device according to claim 1, characterized in that: The inside of the second oil pipe (5) is provided with an oil pressure gauge.

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