Air tightness detection device for brake valve of new energy automobile

Abstract

The utility model relates to an air tightness detection device for a brake valve of a new energy automobile, and relates to the technical field of automobile parts, the air tightness detection device comprises a rack for placing the brake valve, the rack is provided with a high-pressure air pipe and a pressure gauge, the high-pressure air pipe inflates the brake valve, the pressure gauge detects the air pressure in the brake valve, and the rack is provided with a limiting mechanism. And the limiting mechanism is used for limiting the position of the brake valve on the rack. The first driving assembly is started to drive the two first limiting blocks to move, and the two first limiting blocks get close to each other and clamp the brake valve in the width direction of the brake valve; the second limiting block is used for limiting the position of the brake valve in the vertical direction; and two third limiting blocks clamp the brake valve in the length direction of the brake valve, so that the limiting work of various positions on the peripheral side of the brake valve is completed, and the stability and safety of air tightness detection of the brake valve are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an air tightness detection device for a brake valve of a new energy vehicle. Background Art

[0002] The brake valve is a key component in the automobile braking system. Its main function is to control the flow of brake fluid (or air pressure) to achieve vehicle deceleration or parking. The brake valve is usually located between the brake master cylinder and the brake wheel cylinder (or brake). When the driver steps on the brake pedal, the brake valve will adjust the pressure of the brake fluid according to the force and stroke of the pedal to ensure that the brakes of each wheel can obtain appropriate braking force, so that the vehicle can be decelerated or stopped smoothly and safely.

[0003] In the related art, reference can be made to the Chinese invention patent with authorization announcement number CN106976450A, which discloses a brake valve, including a valve body, a left valve core, a right valve core, an end cover, and a push rod; the valve body is provided with a left valve hole, a right valve hole, a push plate hole, an end cover hole, a left oil inlet hole, a right oil inlet hole, an oil return hole, an oil return channel, a left control oil port, a right control oil port, a screw hole, and a hinge hole; the left valve core is installed in the left valve hole in the valve body and can move along the axial direction of the valve body, the right valve core is installed in the right valve hole in the valve body and can move along the axial direction of the valve body, the end cover is installed in the end cover hole at the upper end of the valve body and is flush with the upper end of the end cover hole, and the push rod is installed in the middle through hole of the end cover and can move up and down along the through hole.

[0004] The above-mentioned brake valve needs to be tested for air tightness during the production process. During the air tightness test, air is generally ventilated into the brake valve, and its air tightness performance is judged by observing whether the brake valve is leaking. However, since the brake valve is filled with high-pressure gas, when faced with a brake valve with air leakage, the high-pressure gas will rush out of the brake valve from the leaking part of the brake valve, and the brake valve will move under the action of the reaction force generated by the high-pressure gas. The movement of the brake valve is easy to collide with other detection components or staff, so that the brake valve causes damage to the detection components or staff, which has an adverse effect on the air tightness detection of the brake valve. Utility Model Content

[0005] In order to ensure that the brake valve is in a stable position during air tightness testing, the present application provides an air tightness testing device for a brake valve of a new energy vehicle.

[0006] The present application provides an air tightness detection device for a brake valve of a new energy vehicle, which adopts the following technical solution:

[0007] A device for detecting air tightness of a brake valve of a new energy vehicle comprises a frame for placing the brake valve, a high-pressure air pipe and a pressure gauge are arranged on the frame, the high-pressure air pipe inflates the inside of the brake valve, the pressure gauge detects the air pressure inside the brake valve, a limiting mechanism is arranged on the frame, the limiting mechanism limits the position of the brake valve on the frame, and the limiting mechanism comprises:

[0008] Two first limit blocks, both of which are horizontally slidably arranged on the frame, and are respectively located on both sides of the brake valve in a width direction;

[0009] A first driving assembly, wherein the first driving assembly is arranged on the frame and is used to drive the two first limit blocks to move, and the two first limit blocks clamp the brake valve in the width direction of the brake valve under the action of the first driving assembly;

[0010] A second limit block, which is vertically slidably disposed on the frame and is located above the brake valve;

[0011] A second driving assembly, the second driving assembly is arranged on the frame and is used to drive the second limit block to move, and the second limit block is pressed vertically downward against the brake valve under the action of the second driving assembly;

[0012] Two third limit blocks, both of which are horizontally slidably arranged on the second limit block, and the two third limit blocks are respectively located on both sides of the brake valve in the length direction;

[0013] The third driving assembly is arranged on the second limiting block and is used to drive the two third limiting blocks to move. The two third limiting blocks clamp the brake valve in the length direction of the brake valve under the action of the third driving assembly.

[0014] By adopting the above technical scheme, after the brake valve that needs to be tested for air tightness is placed on the frame, the first drive assembly starts to drive the two first limit blocks to move, and the two first limit blocks approach each other and clamp the brake valve in the width direction of the brake valve; while the two first limit blocks clamp the brake valve, the second drive assembly starts to drive the second limit block to move downward, and the second limit block is pressed vertically downward against the brake valve under the action of the second drive assembly, and the second limit block limits the position of the brake valve in the vertical direction; after the second limit block presses against the brake valve, the third drive assembly starts to drive the two third limit blocks approach each other and clamp the brake valve, and the two third limit blocks clamp the brake valve in the length direction of the brake valve, thereby completing the limiting work of the position in all directions around the brake valve, reducing the probability of the brake valve moving when leaking, and ensuring the stability and safety of the brake valve air tightness detection.

[0015] Optionally, the first driving component includes:

[0016] A first driving screw rod, the first driving screw rod is rotatably arranged on the frame, the first driving screw rod is provided with two threaded sections with opposite spiral lines from the middle to both ends, and the two first limit blocks are both threadedly connected to the first driving screw rod and are respectively located on the two threaded sections with opposite spiral lines;

[0017] A first driving motor is arranged on the frame and an output shaft of the first driving screw is connected to the first driving screw.

[0018] By adopting the above technical solution, the first drive motor is started to drive the first drive screw to rotate, and the rotation of the first drive screw drives the two first limit blocks to move closer to or away from each other, thereby realizing the movement and adjustment of the positions of the two first limit blocks by controlling the first drive motor.

[0019] Optionally, the second driving component includes:

[0020] A second driving cylinder, the second driving cylinder is arranged on the frame, and a piston rod of the second driving cylinder is vertically downwardly connected to the second limit block;

[0021] A pressure sensor, wherein the pressure sensor is arranged on the second limit block, and when the second limit block moves downward, the pressure sensor first contacts the brake valve;

[0022] A controller is arranged on the frame and is electrically connected to the second driving cylinder and the pressure sensor.

[0023] By adopting the above technical scheme, when it is necessary to limit the vertical position of the brake valve, the second driving cylinder is started to drive the second limit block to move downward and press against the brake valve, so that the second limit block can complete the limiting work of the brake valve; a pressure sensor is installed on the second limit block and a controller electrically connected to the second driving cylinder and the pressure sensor is installed on the frame, and the maximum force value applied to the brake valve when the second limit block presses the brake valve is set on the controller, so that when the pressure felt by the pressure sensor reaches the target value set by the controller, the controller controls the second driving cylinder to stop working, thereby reducing the probability of the second limit block pressing the brake valve with excessive pressure and breaking the brake valve when the second driving cylinder drives the second limit block to move.

[0024] Optionally, the third driving component includes:

[0025] Two third driving springs, a sliding groove is provided on the second limit block along the length direction of the brake valve, the two third limit blocks are both located in the sliding groove, the two third driving springs are respectively arranged on the two opposite inner side walls in the length direction of the sliding groove and are respectively connected to the two third limit blocks, and the two third limit blocks clamp the brake valve under the action of the two third driving springs;

[0026] Two pull rods are horizontally slidably arranged on the second limit block and are respectively connected to the two third limit blocks, one end of the pull rod is located in the sliding groove, and the other end of the pull rod extends out of the second limit block.

[0027] By adopting the above technical solution, when the second limit block moves downward, the two pull rods are pulled so that the two third limit blocks compress the two third driving springs and move away from each other. When the second limit block presses the brake valve, the two pull rods are released, and the two third limit blocks approach each other and clamp the brake valve under the action of the two third driving springs, thereby completing the limiting work on the length direction of the brake valve.

[0028] Optionally, the high-pressure air pipe is arranged on the second limit block, and when the second limit block presses the brake valve, the high-pressure air pipe is connected to the inside of the brake valve. An inclined guide surface is provided on the bottom surface of the third limit block, and the height of the guide surface close to the brake valve is higher than the height away from the brake valve.

[0029] By adopting the above technical scheme, the high-pressure air pipe is set on the second limit block, so that when the second limit block presses the brake valve, the connection between the high-pressure air pipe and the brake valve is also completed, which simplifies the work process and improves work efficiency; a guide surface is opened on the bottom surface of the third limit block, so that when the second limit block moves downward, the guide surface of the third limit block first contacts the brake valve, and the guide surface will generate a component force that drives the third limit block to compress the third drive spring, so that there is no need to manually pull the pull rod to drive the third limit block to compress the third drive spring to move, which reduces the work intensity and improves the work efficiency.

[0030] Optionally, a V-shaped snap-in groove is provided on the side wall of the first driving block in contact with the brake valve, and when the brake valve is snapped into the snap-in groove, the vertical position of the high-pressure air pipe is aligned with the air inlet of the brake valve.

[0031] By adopting the above technical solution, a "V"-shaped clamping groove is opened on the first driving block, so that when the two first driving blocks clamp the brake valve, the position of the brake valve is positioned through the guidance of the clamping groove, so that the position of the brake valve when clamped by the two first driving blocks can be connected with the high-pressure air pipe, and there is no need to manually adjust the position of the brake valve repeatedly to align the position of the high-pressure air pipe with the position of the brake valve air inlet, which reduces work intensity and improves work efficiency.

[0032] Optionally, the surfaces of the first limiting block and the third limiting block are both covered with rubber pads.

[0033] By adopting the above technical solution, rubber pads are coated on the surfaces of the first limit block and the third limit block. The rubber pads increase the friction force of the first limit block and the third limit block on the brake valve and buffer the rigid contact between the first limit block and the third limit block and the brake valve, thereby improving the limiting stability of the first limit block and the third limit block on the brake valve while also protecting the brake valve.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. The first drive assembly is started to drive the two first limit blocks to move, and the two first limit blocks approach each other and clamp the brake valve in the width direction of the brake valve; while the two first limit blocks clamp the brake valve, the second drive assembly is started to drive the second limit block to move downward, and the second limit block is pressed vertically downward against the brake valve under the action of the second drive assembly, and the second limit block limits the position of the brake valve in the vertical direction; after the second limit block presses against the brake valve, the third drive assembly is started to drive the two third limit blocks to approach each other and clamp the brake valve, and the two third limit blocks clamp the brake valve in the length direction of the brake valve, thereby completing the position limiting work of the brake valve in various directions around the brake valve, reducing the probability of the brake valve moving in position when leaking, and ensuring the stability and safety of the brake valve air tightness detection;

[0036] 2. By arranging the high-pressure air pipe on the second limit block, the connection work between the high-pressure air pipe and the brake valve is also completed when the second limit block presses the brake valve, which simplifies the work process and improves the work efficiency; a guide surface is provided on the bottom surface of the third limit block, so that when the second limit block moves downward, the guide surface of the third limit block first contacts the brake valve, and the guide surface generates a component force that drives the third limit block to compress the third drive spring, so that there is no need to manually pull the pull rod to drive the third limit block to compress the third drive spring to move, which reduces the work intensity and improves the work efficiency;

[0037] 3. By covering the surfaces of the first limit block and the third limit block with rubber pads, the rubber pads increase the friction force of the first limit block and the third limit block on the brake valve while buffering the rigid contact between the first limit block and the third limit block and the brake valve, thereby improving the limiting stability of the first limit block and the third limit block on the brake valve while also protecting the brake valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional structural schematic diagram of the present application;

[0039] Figure 2 It is a structural schematic diagram of the limiting mechanism in this application;

[0040] Figure 3It is a structural schematic diagram of the third drive component in this application.

[0041] Figure numerals: 1. frame; 11. high-pressure air pipe; 12. pressure gauge; 13. snap-in groove; 14. sliding groove; 15. guide surface; 2. limiting mechanism; 21. first limiting block; 22. first driving assembly; 23. second limiting block; 24. second driving assembly; 25. third limiting block; 26. third driving assembly; 31. first driving screw rod; 32. first driving motor; 41. second driving cylinder; 42. pressure sensor; 43. controller; 51. third driving spring; 52. pull rod. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 -Attached Figure 3 This application is described in further detail.

[0043] The embodiment of the present application discloses an air tightness detection device for a brake valve of a new energy vehicle.

[0044] Reference Figure 1 The air tightness detection device for the brake valve of a new energy vehicle includes a frame 1, and the brake valve is placed on the frame 1. A high-pressure air pipe 11 and a pressure gauge 12 are installed on the frame 1. The high-pressure air pipe 11 inflates the inside of the brake valve, and the pressure gauge 12 detects the air pressure inside the brake valve. A limiting mechanism 2 is arranged on the frame 1, and the limiting mechanism 2 limits the position of the brake valve on the frame 1.

[0045] Reference Figure 1 and Figure 2 The limiting mechanism 2 includes two first limiting blocks 21, a first driving assembly 22, a second limiting block 23, a second driving assembly 24, two third limiting blocks 25 and a third driving assembly 26. The first limiting blocks 21 and the third limiting blocks 25 are both covered with rubber cushions. The two first limiting blocks 21 are both horizontally slidably mounted on the frame 1 and are respectively located on both sides of the width direction of the brake valve. "V"-shaped clamping grooves 13 are provided on the two opposite side walls of the two first limiting blocks 21. The first driving assembly 22 is arranged on the frame 1 and is used to drive the two first limiting blocks 21 to move closer to or away from each other.

[0046] Reference Figure 1 and Figure 2 The first drive assembly 22 includes a first drive screw 31 and a first drive motor 32. The first drive screw 31 is rotatably mounted on the frame 1. The first drive screw 31 has two threaded sections with opposite spiral lines from the middle to both ends. The two first limit blocks 21 are both threadedly connected to the first drive screw 31 and are respectively located on the two threaded sections with opposite spiral lines. The first drive motor 32 is fixedly mounted on the frame 1 and its output shaft is connected to the first drive screw 31.

[0047] Reference Figure 1 and Figure 2 The first drive motor 32 starts to drive the first drive screw 31 to rotate, and the first drive screw 31 rotates to drive the two first limit blocks 21 to move closer to or farther from each other, so that the movement and adjustment of the positions of the two first limit blocks 21 are achieved by controlling the first drive motor 32. The first drive motor 32 starts to control the two first limit blocks 21 to move closer to each other and clamp the brake valve, thereby completing the position limiting work of the brake valve in the width direction.

[0048] Reference Figure 1 and Figure 2 The second limit block 23 is vertically slidably mounted on the frame 1 and is located above the brake valve. The second drive assembly 24 is disposed on the frame 1 and is used to drive the second limit block 23 to move. Under the action of the second drive assembly 24, the second limit block 23 is vertically pressed downward against the brake valve.

[0049] Reference Figure 2 and Figure 3 The second driving assembly 24 includes a second driving cylinder 41, a pressure sensor 42 and a controller 43. The second driving cylinder 41 is fixedly mounted on the frame 1 above the second limit block 23. The piston rod of the second driving cylinder 41 is vertically downward and fixedly connected to the upper surface of the second limit block 23. The pressure sensor 42 is fixedly mounted on the lower surface of the second limit block 23. The controller 43 is fixedly mounted on the frame 1 and is electrically connected to the second driving cylinder 41 and the pressure sensor 42.

[0050] Reference Figure 2 and Figure 3 When the vertical position of the brake valve needs to be limited, the second driving cylinder 41 is started to drive the second limit block 23 to move downward and press against the brake valve, so that the second limit block 23 can complete the limiting work of the brake valve. A pressure sensor 42 is installed on the second limit block 23, and a controller 43 electrically connected to the second driving cylinder 41 and the pressure sensor 42 is installed on the frame 1. The maximum force value applied to the brake valve when the second limit block 23 presses the brake valve is set on the controller 43. Therefore, when the pressure felt by the pressure sensor 42 reaches the target value set by the controller 43, the controller 43 controls the second driving cylinder 41 to stop working, thereby reducing the probability that the second driving cylinder 41 drives the second limit block 23 to move and press the brake valve due to excessive pressure and crushing the brake valve.

[0051] Reference Figure 2 and Figure 3A sliding groove 14 is provided on the lower surface of the second limit block 23 along the length direction of the brake valve, and two third limit blocks 25 are both slidably mounted on the sliding groove 14 and are respectively located at the two ends of the sliding groove 14. Inclined guide surfaces 15 are provided on the bottom surfaces of the two third limit blocks 25. The height of the guide surface 15 close to the brake valve is higher than the height of the guide surface 15 away from the brake valve. The third driving assembly 26 is arranged on the second limit block 23 and is used to drive the two third limit blocks 25 to move. Under the action of the third driving assembly 26, the two third limit blocks 25 clamp the brake valve in the length direction of the brake valve.

[0052] Reference Figure 2 and Figure 3 The third driving assembly 26 includes two third driving springs 51 and two pull rods 52. The two third driving springs 51 are respectively fixedly connected to the two inner side walls opposite to each other in the length direction of the sliding groove 14. The two third driving springs 51 are respectively fixedly connected to the two third limit blocks 25. Under the action of the two third driving springs 51, the two third limit blocks 25 approach each other and clamp the brake valve. The two pull rods 52 are both horizontally slidably installed on the second limit block 23 and are respectively located on both sides of the two third limit blocks 25 that are away from each other. One end of the pull rod 52 is located in the sliding groove 14 and is fixedly connected to one end of the third limit block 25 away from the brake valve. The other end of the pull rod 52 extends out of the second limit block 23.

[0053] Reference Figure 2 and Figure 3 When the second limit block 23 moves downward, the two pull rods 52 are pulled so that the two third limit blocks 25 compress the two third drive springs 51 and move away from each other. When the second limit block 23 presses the brake valve, the two pull rods 52 are released, and the two third limit blocks 25 approach each other and clamp the brake valve under the action of the two third drive springs 51, thereby completing the limiting work of the position of the brake valve in the length direction.

[0054] The working principle of the embodiment of the present application is as follows:

[0055] After the brake valve that needs to be tested for air tightness is placed on the frame 1, the first drive motor 32 is started to drive the two first limit blocks 21 to move, and the two first limit blocks 21 are close to each other and clamp the brake valve in the width direction of the brake valve; while the two first limit blocks 21 clamp the brake valve, the second drive cylinder 41 is started to drive the second limit block 23 to move downward, and the second limit block 23 is vertically pressed against the brake valve under the action of the second drive assembly 24, and the second limit block 23 limits the position of the brake valve in the vertical direction; after the second limit block 23 is pressed against the brake valve, the third drive spring 51 drives the two third limit blocks 25 to approach each other and clamp the brake valve, and the two third limit blocks 25 clamp the brake valve in the length direction of the brake valve, thereby completing the limiting work of the position in various directions around the brake valve, reducing the probability of the brake valve moving when leaking, and ensuring the stability and safety of the brake valve air tightness detection.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air tightness detection device for a brake valve of a new energy vehicle, characterized in that: The invention comprises a frame (1) for placing a brake valve, wherein the frame (1) is provided with a high-pressure air pipe (11) and a pressure gauge (12), wherein the high-pressure air pipe (11) inflates the interior of the brake valve, and the pressure gauge (12) detects the air pressure inside the brake valve, and wherein a limiting mechanism (2) is provided on the frame (1), wherein the limiting mechanism (2) limits the position of the brake valve on the frame (1), and wherein the limiting mechanism (2) comprises: Two first limit blocks (21), the two first limit blocks (21) are both horizontally slidably arranged on the frame (1), and the two first limit blocks (21) are respectively located on both sides of the brake valve in a width direction; a first driving assembly (22), the first driving assembly (22) being arranged on the frame (1) and used for driving the two first limiting blocks (21) to move, wherein the two first limiting blocks (21) clamp the brake valve in a width direction of the brake valve under the action of the first driving assembly (22); A second limit block (23), the second limit block (23) being vertically slidably disposed on the frame (1) and being located above the brake valve; a second driving assembly (24), the second driving assembly (24) being arranged on the frame (1) and used for driving the second limiting block (23) to move, the second limiting block (23) being pressed vertically downward against the brake valve under the action of the second driving assembly (24); Two third limit blocks (25), both of which are horizontally slidably arranged on the second limit block (23), and the two third limit blocks (25) are respectively located on both sides of the brake valve in the length direction; A third driving assembly (26), the third driving assembly (26) being arranged on the second limiting block (23) and being used to drive the two third limiting blocks (25) to move, wherein the two third limiting blocks (25) clamp the brake valve in the length direction of the brake valve under the action of the third driving assembly (26).

2. The air tightness detection device for the brake valve of a new energy vehicle according to claim 1 is characterized in that: The first driving assembly (22) comprises: A first driving screw rod (31), the first driving screw rod (31) is rotatably arranged on the frame (1), the first driving screw rod (31) is provided with two threaded sections with opposite spiral lines from the middle to the two ends, and the two first limit blocks (21) are both threadedly connected to the first driving screw rod (31) and are respectively located on the two threaded sections with opposite spiral lines; A first driving motor (32), wherein the first driving motor (32) is arranged on the frame (1) and the output shaft is connected to the first driving screw rod (31).

3. The air tightness detection device for a brake valve of a new energy vehicle according to claim 1 is characterized in that: The second drive assembly (24) comprises: A second driving cylinder (41), wherein the second driving cylinder (41) is arranged on the frame (1), and a piston rod of the second driving cylinder (41) is vertically connected downward to a second limit block (23); A pressure sensor (42), wherein the pressure sensor (42) is arranged on the second limit block (23), and when the second limit block (23) moves downward, the pressure sensor (42) first contacts the brake valve; A controller (43) is arranged on the frame (1) and is electrically connected to the second driving cylinder (41) and the pressure sensor (42).

4. The air tightness detection device for the brake valve of a new energy vehicle according to claim 3 is characterized in that: The third drive assembly (26) comprises: Two third drive springs (51); a sliding groove (14) is provided on the second limit block (23) along the length direction of the brake valve; the two third limit blocks (25) are both located in the sliding groove (14); the two third drive springs (51) are respectively arranged on two opposite inner side walls of the sliding groove (14) in the length direction and are respectively connected to the two third limit blocks (25); the two third limit blocks (25) clamp the brake valve under the action of the two third drive springs (51); Two pull rods (52), both of which are horizontally slidably arranged on the second limit block (23) and are respectively connected to two third limit blocks (25), one end of the pull rod (52) is located in the sliding groove (14), and the other end of the pull rod (52) extends out of the second limit block (23).

5. The air tightness detection device for the brake valve of a new energy vehicle according to claim 3 is characterized in that: The high-pressure air pipe (11) is arranged on the second limit block (23); when the second limit block (23) presses the brake valve, the high-pressure air pipe (11) is connected to the inside of the brake valve; an inclined guide surface (15) is provided on the bottom surface of the third limit block (25); the height of the guide surface (15) close to the brake valve is higher than the height of the guide surface away from the brake valve.

6. The air tightness detection device for a brake valve of a new energy vehicle according to claim 1 is characterized in that: A "V"-shaped clamping groove (13) is provided on the side wall of the first limit block (21) that contacts the brake valve. When the brake valve is clamped into the clamping groove (13), the position of the high-pressure air pipe (11) in the vertical direction is aligned with the air inlet of the brake valve.

7. The air tightness detection device for a brake valve of a new energy vehicle according to claim 1 is characterized in that: The surfaces of the first limiting block (21) and the third limiting block (25) are both covered with rubber cushions.

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