A kind of endurance fatigue test equipment for automobile brake pipe joints

Abstract

A durability fatigue test equipment for automobile brake pipe connection belongs to the technical field of brake pipe interface performance testing. The present invention includes a test cabin, a servo motor is fixedly installed inside the test cabin, and the output shaft of the servo motor is fixedly connected to a rotating shaft, a fixed plate is fixedly connected inside the test cabin, and a dynamic vibration mechanism is provided at the end of the rotating shaft so that when the brake pipe interface is tested, working pressures of different vibration amplitudes can be applied to the brake pipe interface, and a transmission mechanism is provided inside the fixed plate so that when the brake pipe interface leaks under extreme working conditions, the vibration test of the brake pipe interface can be automatically stopped. By turning the knob to adjust the rotating rod, the slide rod is driven to slide in the slide groove, so that multiple slide rods are moved away from each other in the first limit groove, and the cam rotation diameter is increased, thereby adjusting the vibration amplitude of the brake pipe interface, which can meet the testing requirements of different brake pipes under various working conditions and improve the flexibility and accuracy of the test.

Description

Technical Field

[0001] The invention relates to the technical field of brake pipe interface performance testing, in particular to a device for testing the durability fatigue of a connection of an automobile brake pipe. Background Art

[0002] The function of a vehicle's braking system is to slow the vehicle down at an appropriate deceleration rate until it comes to a stop. When driving downhill, it also maintains a stable speed, allowing the vehicle to stop reliably on the spot or on the slope. As vehicle speeds continue to increase, the demand for braking performance is also increasing. In addition to achieving excellent braking performance, the braking system must also minimize the driver's workload. Therefore, dynamic braking systems are widely used in vehicles.

[0003] During vehicle operation, the brake pipe will change with the steering and jolting of the tires. The frequency and amplitude of the rotation and jolting have a significant impact on the life of the brake pipe. Therefore, before installation and operation, the brake pipe needs to be subjected to a durability test. During the test, the general brake pipe durability test equipment has fixed parameters such as the frequency and amplitude. Since the steering and jolting of the tires will cause the brake pipe to experience complex and variable dynamic stresses, the frequency and amplitude of these dynamic stresses have a crucial impact on the life of the brake pipe. Therefore, it is unable to address the limit vibration frequency of the brake pipe when it leaks under different vibration amplitudes. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of the limit vibration frequency of the brake pipe when it leaks at different vibration amplitudes under working pressure, and to propose a durable fatigue test equipment for automobile brake pipe connections.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a vehicle brake pipe connection endurance fatigue test device, comprising a test chamber, a servo motor is fixedly installed inside the test chamber, and the output shaft of the servo motor is fixedly connected to the rotating shaft, and a fixing plate is fixedly connected to the inside of the test chamber;

[0006] The end of the rotating shaft is provided with a dynamic vibration mechanism so as to apply working pressures of different vibration amplitudes to the brake pipe interface when testing the brake pipe interface;

[0007] A transmission mechanism is provided inside the fixing plate so as to automatically stop the vibration test on the brake pipe interface when the brake pipe interface leaks under extreme working conditions.

[0008] Furthermore, the dynamic vibration mechanism includes a rotating plate, and a first through slot is formed through the side wall of the rotating plate, a first limiting rod is fixedly connected to the inside of the first through slot, and a first slider is slidably connected to the outer wall of the first limiting rod, a first spring is fixedly connected to the side wall of the first slider, and an end of the first spring away from the first slider is fixedly connected to the inner wall of the first through slot, a cam is fixedly connected to the outer wall of the first slider, and an extrusion block is fixedly connected to one end of the first slider.

[0009] Furthermore, the inner wall of the test chamber is fixedly connected to a fixed cylinder, and one end of the fixed cylinder is fixedly connected to a connecting shell, a side wall of the connecting shell is penetrated with a first limiting groove, the interior of the connecting shell is rotatably connected to a turntable, and the side wall of the turntable is penetrated with a sliding groove, the inner wall of the sliding groove is rotatably connected to a sliding rod, and the outer wall of the sliding rod is slidably connected to the inner wall of the first limiting groove, the end of the sliding rod away from the sliding groove is fixedly connected to an extrusion plate, the side wall of the extrusion plate is fixedly connected to a rotating rod, and the outer wall of the rotating rod penetrates and is rotatably connected to the inner wall of the fixed cylinder, and the end of the rotating rod away from the turntable is fixedly connected to a knob.

[0010] Furthermore, the end of the rotating plate is fixedly connected to the end of the rotating shaft, the outer wall of the extrusion block slides in contact with the outer wall of the fixed cylinder, and the outer wall of the fixed cylinder is rotatably connected to the interior of the test chamber.

[0011] Furthermore, the transmission mechanism includes a movable block, and a second through-slot is penetrated through the side wall of the movable block, the inner wall of the second through-slot is fixedly connected to a second limiting rod, and the outer wall of the second limiting rod is fixedly connected to a second slider, the top of the second slider is fixedly connected to a second spring, and the end of the second spring away from the second limiting rod is fixedly connected to the inner wall of the second through-slot, the inner wall of the movable block is slidably connected to a push rod, and the end of the second slider is fixedly connected to the outer wall of the push rod.

[0012] Furthermore, a second limiting groove is provided inside the movable block, and the inner wall of the second limiting groove is slidably connected to a fixed block, a sealing cavity is provided inside the fixed block, and the inner wall of the sealing cavity is slidably connected to a sealing block, the outer wall of the sealing block is fixedly connected to the inner wall of the second limiting groove, a connecting pipe is provided inside the sealing block, and a groove is provided at the bottom of the movable block.

[0013] Furthermore, the outer wall of the movable block is slidably connected to the inside of the fixed plate, the side wall of the cam is slidably connected to the side wall of the slot, the end of the cam corresponds to the bottom of the push rod, and the outer wall of the fixed block is fixedly connected to the inside of the fixed plate.

[0014] Furthermore, the top of the support rod is fixedly connected to a sealing box, and the interior of the sealing box is fixedly connected to a mounting interface, one end of the connecting pipe is connected to the interior of the sealing box, and the other end of the connecting pipe is connected to the interior of the sealing cavity.

[0015] Furthermore, a gas-liquid booster pump is fixedly installed on the top of the fixed plate, an encoder is fixedly installed inside the test chamber, and the encoder is connected to the output shaft of the servo motor through a belt.

[0016] Compared with the prior art, the above solution has the following beneficial effects:

[0017] 1. By turning the knob, the rotating rod rotates, causing the sliding rod to slide along the inner wall of the slide groove. Then, multiple sliding rods slide away from each other along the inner wall of the first limit groove, making the rotation diameter of the cam larger. This can increase the vibration amplitude of the brake pipe interface, thereby enabling adaptive adjustment based on the extreme vibration amplitude of different brake pipe interfaces. At the same time, the vibration amplitude can be finely controlled to meet the testing requirements of different brake pipes under different working conditions.

[0018] 2. When the vibration amplitude of the brake pipe interface reaches the limit and leakage occurs, the leaked hydraulic oil will flow into the inside of the sealing box. Then, after the hydraulic oil reaches the inside of the sealing cavity, it will drive the sealing block to slide upward along the inner wall of the sealing cavity. When the movable block moves upward to a certain position, the rotation of the cam will no longer contact the lever. Therefore, when the brake pipe interface leaks, the vibration test of the brake pipe interface can be automatically stopped, which improves work efficiency and effectively avoids further damage to the device and the brake pipe due to continuous vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention;

[0020] Figure 2 This is a cross-sectional view of the interior structure of the test chamber proposed by the present invention;

[0021] Figure 3 This is a cross-sectional view of the structure of the dynamic vibration mechanism proposed by the present invention;

[0022] Figure 4 A schematic diagram of a portion of the structure of the dynamic vibration mechanism proposed in the present invention;

[0023] Figure 5 A cross-sectional view of the first portion of the transmission mechanism proposed in the present invention;

[0024] Figure 6 A cross-sectional view of the second portion of the transmission mechanism proposed in the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the structural connection proposed by the present invention.

[0026] The symbols in the accompanying drawings are: 1, test chamber; 2, servo motor; 3, rotating shaft; 4, dynamic vibration mechanism; 5, fixed plate; 6, transmission mechanism; 7, sealing box; 8, mounting interface; 9, gas-liquid booster pump; 10, encoder; 401, rotating plate; 402, first through slot; 403, first limiting rod; 404, first slider; 405, first spring; 406, cam; 407, extrusion block; 408, fixing cylinder; 409, connecting shell; 4 10. First limiting groove; 411. Turntable; 412. Slide groove; 413. Slide rod; 414. Extrusion plate; 415. Turnbar; 416. Knob; 601. Movable block; 602. Second through groove; 603. Second limiting rod; 604. Second slider; 605. Second spring; 606. Push rod; 607. Second limiting groove; 608. Fixed block; 609. Sealing chamber; 610. Sealing block; 611. Connecting pipe; 612. Slot. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," and "bottom" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate description and simplify the present invention. They are not intended to indicate or imply that the positions or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used solely to distinguish an entity or operation from another entity or operation and do not require or imply any actual relationship, order, or relative importance between these entities or operations.

[0029] For example 1, please refer to Figure 1 、 Figure 2 and Figure 7 A vehicle brake pipe connection durability fatigue test device includes a test chamber 1, a servo motor 2 is fixedly installed inside the test chamber 1, and the output shaft of the servo motor 2 is fixedly connected to a rotating shaft 3, a fixing plate 5 is fixedly connected inside the test chamber 1, a sealing box 7 is fixedly connected to the top of the stop rod 606, and a mounting interface 8 is fixedly connected to the inside of the sealing box 7, and a gas-liquid booster pump 9 is fixedly installed on the top of the fixing plate 5;

[0030] Before testing the brake pipe interface, first connect the end of the brake pipe to the gas-liquid booster pump 9, and then drive the gas-liquid booster pump 9 to fill the inside of the brake pipe with hydraulic oil. The gas-liquid booster pump 9 can be set through the control panel to boost the pressure inside the brake pipe to the pressure value required for the test. If the brake pipe interface leaks during the test, it can be replenished to the set value in time. Then open the sealing box 7, and then thread the threaded interface of the brake pipe to be tested with the inside of the installation interface 8. Then close the sealing box 7 so that the inner wall of the sealing box 7 is a sealed space, thereby completing the installation work for testing the brake pipe.

[0031] For example 2, please refer to Figure 2-4 Based on the first embodiment, in this embodiment, a dynamic vibration mechanism 4 is provided at the end of the rotating shaft 3 so as to apply working pressures of different vibration amplitudes to the brake pipe interface when testing the brake pipe interface;

[0032] The dynamic vibration mechanism 4 includes a rotating plate 401, and a first through slot 402 is formed on the side wall of the rotating plate 401, a first limiting rod 403 is fixedly connected to the inside of the first through slot 402, and a first slider 404 is slidably connected to the outer wall of the first limiting rod 403, a first spring 405 is fixedly connected to the side wall of the first slider 404, and the end of the first spring 405 away from the first slider 404 is fixedly connected to the inner wall of the first through slot 402, a cam 406 is fixedly connected to the outer wall of the first slider 404, and an extrusion block 407 is fixedly connected to one end of the first slider 404, a fixed cylinder 408 is fixedly connected to the inner wall of the test chamber 1, and one end of the fixed cylinder 408 is fixedly connected to the connecting shell 409, a first limiting slot 410 is formed on the side wall of the connecting shell 409, and a connecting The shell 409 is internally rotatably connected to a turntable 411, and a sliding groove 412 is penetrated through the side wall of the turntable 411, the inner wall of the sliding groove 412 is rotatably connected to a sliding rod 413, and the outer wall of the sliding rod 413 is slidably connected to the inner wall of the first limiting groove 410, the end of the sliding rod 413 away from the sliding groove 412 is fixedly connected to an extrusion plate 414, the side wall of the extrusion plate 414 is fixedly connected to a rotating rod 415, and the outer wall of the rotating rod 415 is rotatably connected to the inner wall of the fixed cylinder 408, the end of the rotating rod 415 away from the turntable 411 is fixedly connected to a knob 416, the end of the rotating plate 401 is fixedly connected to the end of the rotating shaft 3, the outer wall of the extrusion block 407 is slidably fitted with the outer wall of the fixed cylinder 408, and the outer wall of the fixed cylinder 408 is rotatably connected to the inside of the test chamber 1.

[0033] When testing the brake pipe interface, the servo motor 2 is driven to output, so that the output shaft 3 rotates, and then the shaft 3 drives the rotating plate 401 to rotate synchronously. At the same time, the rotating plate 401 drives the cam 406 to move through the first slider 404. During this process, the cam 406 squeezes the sealing box 7 through the transmission mechanism 6, so that when the rotating plate 401 rotates one circle, the sealing box 7 performs a vibration test on the brake pipe interface inside the mounting interface 8. When it is necessary to test different vibration amplitudes of the brake pipe interface, the rotating knob 416 is controlled to rotate the rotating rod 415, and then the first spring 405 drives the turntable 411 to rotate along the inner wall of the connecting shell 409 during the rotation process, and can drive the sliding rod 413 to slide along the inner wall of the sliding groove 412. Since the direction of the sliding groove 412 is limited by the first limiting groove 410, when the turntable 411 rotates, multiple sliding rods 413 can be moved away from each other along the inner wall of the first limiting groove 410. When the first spring 405 is engaged, the first slider 404 is driven to slide outward along the inner wall of the first through slot 402 , and the first slider 404 is driven to drive the cam 406 to move synchronously, thereby increasing the rotation diameter of the cam 406 and increasing the vibration amplitude of the brake pipe interface. The outer wall of the rotating rod 415 and the knob 416 are connected in rotation with a damping material to prevent the rotating rod 415 from driving the turntable 411 to deflect. When the vibration amplitude of the brake pipe interface needs to be reduced, the knob 416 is rotated in the opposite direction to move the multiple extrusion plates 414 in the direction of approaching each other, thereby driving the first slider 404 to reset and slide through the first spring 405 to change the rotation diameter of the cam 406, thereby enabling adaptive adjustment according to the vibration amplitude of the different brake pipe interfaces.

[0034] For example three, please refer to Figure 2 and Figure 5-7 Based on the second embodiment, in this embodiment, a transmission mechanism 6 is provided inside the fixing plate 5 to automatically stop the vibration test of the brake pipe interface when the brake pipe interface leaks under extreme working conditions;

[0035] The transmission mechanism 6 includes a movable block 601, and a second through-slot 602 is formed through the side wall of the movable block 601, a second limiting rod 603 is fixedly connected to the inner wall of the second through-slot 602, and a second slider 604 is fixedly connected to the outer wall of the second limiting rod 603, a second spring 605 is fixedly connected to the top of the second slider 604, and the end of the second spring 605 away from the second limiting rod 603 is fixedly connected to the inner wall of the second through-slot 602, the inner wall of the movable block 601 is slidably connected to a push rod 606, the end of the second slider 604 is fixedly connected to the outer wall of the push rod 606, a second limiting slot 607 is formed through the interior of the movable block 601, and a fixed block 608 is slidably connected to the inner wall of the second limiting slot 607, a sealing cavity 609 is formed inside the fixed block 608, and a sealing cavity 609 is formed inside the fixed block 608. The inner wall of the cavity 609 is slidably connected with a sealing block 610, and the outer wall of the sealing block 610 is fixedly connected to the inner wall of the second limit groove 607. The interior of the sealing block 610 is penetrated and fixedly connected with a connecting pipe 611. A slot 612 is provided at the bottom of the movable block 601. The outer wall of the movable block 601 is slidably connected to the inside of the fixed plate 5. The side wall of the cam 406 is slidably connected to the side wall of the slot 612. The end of the cam 406 corresponds to the bottom of the push rod 606. The outer wall of the fixed block 608 is fixedly connected to the inside of the fixed plate 5. One end of the connecting pipe 611 is connected to the inside of the sealing box 7, and the other end of the connecting pipe 611 is connected to the inside of the sealed cavity 609. An encoder 10 is fixedly installed inside the test cabin 1, and the encoder 10 is connected to the output shaft of the servo motor 2 through a belt.

[0036] During the test of the brake pipe interface, the cam 406 can drive the push rod 606 to slide upward along the inside of the movable block 601. During this process, the second slider 604 slides along the outer wall of the second through groove 602, which can ensure that the sliding of the push rod 606 is more stable. At the same time, when the cam 406 passes over the end of the push rod 606, the second spring 605 can drive the push rod 606 to quickly reset and slide, which will not affect the next vibration test. When the brake pipe interface withstands the limit of vibration amplitude and leaks, the leaked hydraulic oil will flow into the interior of the sealing box 7. At the same time, the internal pressure of the brake pipe cannot reach the set value. Then the gas-liquid booster pump 9 will fill the brake pipe with new hydraulic oil. Since the interior of the sealing box 7 is a sealed space during the test, then The hydraulic oil will enter the interior of the sealing chamber 609 through the connecting pipe 611, and then the hydraulic oil will drive the sealing block 610 to slide upward along the inner wall of the sealing chamber 609, and then the sealing block 610 will drive the movable block 601 to slide upward along the inside of the fixed plate 5, and at the same time drive the push rod 606 to move upward synchronously. When the movable block 601 moves upward to a certain position, the rotation of the cam 406 will no longer contact the push rod 606, thereby realizing that when the brake pipe interface leaks, the vibration test of the brake pipe interface can be automatically stopped. During the vibration test, the vibration amplitude applied by the cam 406 to the push rod 606 and the encoder 10 to the output shaft rotation of the servo motor 2 are used to calculate the swing value, so that the limit vibration frequency of the brake pipe when it leaks at different vibration amplitudes under the working pressure can be tested.

[0037] The working principle of the present invention is: before testing the brake pipe interface, first connect the end of the brake pipe to the gas-liquid booster pump 9, then fill the hydraulic oil into the brake pipe by driving the gas-liquid booster pump 9, and the gas-liquid booster pump 9 can be set through the control panel to increase the pressure of the brake pipe to the pressure value required for the test. When the brake pipe interface leaks during the test, it can be replenished to the set value in time, then open the sealing box 7, and then thread the threaded interface of the brake pipe to be tested with the inside of the installation interface 8, and then close the sealing box 7 to make the inner wall of the sealing box 7 a sealed space, thereby completing the installation work of the brake pipe test, and then through The servo motor 2 is driven to output, so that the shaft 3 of the output shaft rotates, and then the shaft 3 drives the rotating plate 401 to rotate synchronously. At the same time, the rotating plate 401 drives the cam 406 to move through the first slider 404. During this process, the cam 406 squeezes the sealing box 7 through the transmission mechanism 6, so that when the rotating plate 401 rotates one circle, the sealing box 7 performs a vibration test on the brake pipe interface inside the installation interface 8. When it is necessary to test different vibration amplitudes on the brake pipe interface, the rotating knob 416 is controlled to rotate the rotating rod 415, and then the first spring 405 drives the turntable 411 along the connecting shell during the rotation process. The inner wall of 409 rotates, and at the same time, it can drive the slide bar 413 to slide along the inner wall of the slide groove 412. Since the direction of the slide groove 412 is limited by the first limiting groove 410, when the turntable 411 rotates, the multiple slide bars 413 can slide away from each other along the inner wall of the first limiting groove 410. At the same time, the slide bar 413 will drive the corresponding extrusion plate 414 to move, thereby increasing the distance between the multiple extrusion plates 414. In this process, the outer wall of the extrusion plate 414 will squeeze the extrusion block 407, and then when the extrusion block 407 is squeezed, it will drive the first slider 404 to slide outward along the inner wall of the first through groove 402 At the same time, the first slider 404 drives the cam 406 to move synchronously, so that the rotation diameter of the cam 406 becomes larger, which can increase the vibration amplitude of the brake pipe interface. The outer wall of the rotating rod 415 and the knob 416 that are rotatably connected is provided with a damping material to prevent the rotating rod 415 from causing the rotating disk 411 to deviate. When it is necessary to reduce the vibration amplitude of the brake pipe interface, the multiple extrusion plates 414 are moved in a direction close to each other by rotating the knob 416 in the opposite direction, so that the first slider 404 is driven by the first spring 405 to reset and slide, and the rotation diameter of the cam 406 is changed, so that it can be adaptively adjusted according to the extreme vibration amplitude that different brake pipe interfaces can withstand.

[0038] When the brake pipe interface is subjected to a vibration amplitude that reaches a limit and leaks, the leaked hydraulic oil will flow into the interior of the sealing box 7. At the same time, the internal pressure of the brake pipe cannot reach the set value. Then the gas-liquid booster pump 9 will fill the brake pipe with new hydraulic oil. Then the hydraulic oil will enter the interior of the sealing cavity 609 through the connecting pipe 611. After that, the hydraulic oil will drive the sealing block 610 to slide upward along the inner wall of the sealing cavity 609. Then the sealing block 610 will drive the movable block 601 to slide upward along the inside of the fixed plate 5, and at the same time will drive the push rod 606 to move upward synchronously. When the movable block 601 moves upward to a certain position, the rotation of the cam 406 will no longer contact the push rod 606, thereby realizing that when the brake pipe interface leaks, the vibration test of the brake pipe interface can be automatically stopped.

[0039] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0040] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A vehicle brake pipe joint durability fatigue test device, comprising a test chamber (1), characterized in that: A servo motor (2) is fixedly installed inside the test chamber (1), and the output shaft of the servo motor (2) is fixedly connected to a rotating shaft (3), and a fixing plate (5) is fixedly connected to the inside of the test chamber (1); The end of the rotating shaft (3) is provided with a dynamic vibration mechanism (4) for applying working pressures of different vibration amplitudes to the brake pipe interface when the brake pipe interface is tested; A transmission mechanism (6) is provided inside the fixing plate (5) to automatically stop the vibration test on the brake pipe interface when the brake pipe interface leaks under extreme working conditions; The dynamic vibration mechanism (4) includes a rotating plate (401), and a first through-slot (402) is formed through a side wall of the rotating plate (401), a first limiting rod (403) is fixedly connected to the interior of the first through-slot (402), and a first slider (404) is slidably connected to the outer wall of the first limiting rod (403), a first spring (405) is fixedly connected to the side wall of the first slider (404), and an end of the first spring (405) away from the first slider (404) is fixedly connected to the inner wall of the first through-slot (402), a cam (406) is fixedly connected to the outer wall of the first slider (404), and an extrusion block (407) is fixedly connected to one end of the first slider (404); The transmission mechanism (6) includes a movable block (601), and a second through-slot (602) is formed through the side wall of the movable block (601), the inner wall of the second through-slot (602) is fixedly connected to a second limiting rod (603), and the outer wall of the second limiting rod (603) is fixedly connected to a second slider (604), the top of the second slider (604) is fixedly connected to a second spring (605), and the end of the second spring (605) away from the second limiting rod (603) is fixedly connected to the inner wall of the second through-slot (602), the inner wall of the movable block (601) is slidably connected to a push rod (606), and the end of the second slider (604) is fixedly connected to the outer wall of the push rod (606); The movable block (601) is provided with a second limiting groove (607) extending through the interior thereof, and a fixed block (608) is slidably connected to the inner wall of the second limiting groove (607), a sealing cavity (609) is provided within the fixed block (608), and a sealing block (610) is slidably connected to the inner wall of the sealing cavity (609), an outer wall of the sealing block (610) is fixedly connected to the inner wall of the second limiting groove (607), a connecting pipe (611) extends through the interior thereof, and a groove (612) is provided at the bottom of the movable block (601); The hydraulic oil leaking from the brake pipe interface will enter the interior of the sealed cavity (609) through the connecting pipe (611), and is used to automatically stop the vibration test of the brake pipe interface.

2. The automobile brake pipe connection durability fatigue test equipment according to claim 1, characterized in that: The inner wall of the test chamber (1) is fixedly connected to a fixed cylinder (408), and one end of the fixed cylinder (408) is fixedly connected to a connecting shell (409), a side wall of the connecting shell (409) is provided with a first limiting groove (410), the interior of the connecting shell (409) is rotatably connected to a turntable (411), and a side wall of the turntable (411) is provided with a sliding groove (412), the inner wall of the sliding groove (412) is rotatably connected to a sliding rod (413), and the sliding rod (413) is provided with a first limiting groove (410). ) is slidably connected to the inner wall of the first limiting groove (410), the end of the sliding rod (413) away from the sliding groove (412) is fixedly connected to the extrusion plate (414), the side wall of the extrusion plate (414) is fixedly connected to the rotating rod (415), and the outer wall of the rotating rod (415) is rotatably connected to the inner wall of the fixed cylinder (408), and the end of the rotating rod (415) away from the turntable (411) is fixedly connected to the knob (416).

3. The automobile brake pipe connection durability fatigue test equipment according to claim 2, characterized in that: The end of the rotating plate (401) is fixedly connected to the end of the rotating shaft (3), the outer wall of the extrusion block (407) slides in contact with the outer wall of the fixed cylinder (408), and the outer wall of the fixed cylinder (408) is connected to the inside of the test chamber (1) through rotation.

4. The automobile brake pipe connection durability fatigue test equipment according to claim 1, characterized in that: The outer wall of the movable block (601) is slidably connected to the inside of the fixed plate (5), the side wall of the cam (406) is slidably connected to the side wall of the slot (612), the end of the cam (406) corresponds to the bottom of the push rod (606), and the outer wall of the fixed block (608) is fixedly connected to the inside of the fixed plate (5).

5. The automobile brake pipe connection durability fatigue test equipment according to claim 4, characterized in that: The top of the support rod (606) is fixedly connected to a sealing box (7), and the interior of the sealing box (7) is fixedly connected to a mounting interface (8), one end of the connecting pipe (611) is connected to the interior of the sealing box (7), and the other end of the connecting pipe (611) is connected to the interior of the sealing cavity (609).

6. The automobile brake pipe connection durability fatigue test equipment according to claim 1, characterized in that: A gas-liquid booster pump (9) is fixedly installed on the top of the fixed plate (5), an encoder (10) is fixedly installed inside the test chamber (1), and the encoder (10) is connected to the output shaft of the servo motor (2) via a belt.

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