Pneumatic brake control pipeline pressure adjusting device for vehicle testing

Abstract

The invention discloses a pneumatic brake control pipeline pressure adjusting device for vehicle testing, which belongs to the technical field of vehicle testing and comprises a pressure adjusting module, a control unit, a man-machine interaction interface and a data interaction module which are electrically connected with one another. The pressure adjusting module comprises a proportional pressure adjusting valve and a pressure sensor, the top of the proportional pressure adjusting valve is fixedly connected with a take-up shell, a wire harness is led out of the top of the proportional pressure adjusting valve, the wire harness penetrates through the take-up shell and extends to the outer side of the take-up shell, and a wire clamping mechanism is arranged on the take-up shell. Remote operation, quick response, accurate adjustment and stable pressure can be achieved, and meanwhile free adjustment of the using length of the wire harness and filtering of a gas circuit are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and more particularly to a pressure regulating device for an air brake control pipeline used for vehicle testing. Background Art

[0002] The ABS system (anti-lock braking system) test of commercial vehicles with air brakes requires multiple tests with gradually increasing line pressure to determine the vehicle's maximum braking strength in order to verify braking performance.

[0003] After searching, the utility model patent with publication number CN205826317U discloses a brake detection device for an air brake vehicle, including a manual valve, a pressure regulator, a pressure gauge, a front axle control component, a rear axle control component, a start switch, a first component control switch, a second component control switch, and a switching switch; the manual valve, pressure regulator, and pressure gauge are connected in sequence through a main pipe, and the front axle control component and the rear axle control component are connected in parallel on the main pipe; the start switch is electrically connected to the first and second component control switches respectively through wires.

[0004] However, existing pressure regulating devices often use manual mechanical valves, which present the following issues: 1. Manual operation is susceptible to human error, resulting in delayed solenoid valve response and low regulation accuracy. 2. Traditional devices experience large pressure fluctuations, making it difficult to quickly stabilize the target pressure, impacting the reliability of test data. Furthermore, they require multiple manual adjustments to the line pressure, resulting in low efficiency. 3. The device's wiring harness is redundant and long, preventing flexible adjustment. Furthermore, impurities in the air line can easily clog the valve body. Therefore, we proposed a pressure regulating device for air brake control lines for vehicle testing. Summary of the Invention

[0005] In response to the problems existing in the prior art, the purpose of the present invention is to provide an air brake control pipeline pressure regulating device for vehicle testing, which can realize remote operation, rapid response, precise regulation and pressure stability, while realizing free adjustment of the wiring harness length and filtering of the air circuit.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A pressure regulating device for an air brake control line for vehicle testing includes a pressure regulating module, a control unit, a human-computer interaction interface, and a data interaction module. The pressure regulating module, the control unit, the human-computer interaction interface, and the data interaction module are all electrically connected. The pressure regulating module includes a proportional pressure regulating valve and a pressure sensor. The top of the proportional pressure regulating valve is fixedly connected to a wire take-up housing. A wiring harness is led out from the top of the proportional pressure regulating valve. The wiring harness passes through the wire take-up housing and extends to the outside of the wire take-up housing. A wire clamping mechanism is provided on the wire take-up housing. The end of the wiring harness is electrically connected to an interaction end. The bottom of the interaction end is electrically connected to a connecting wire. The end of the connecting wire is electrically connected to a cigarette lighter connector and a CAN output connector. An air inlet is provided on the right side of the proportional pressure regulating valve. A baffle ring is integrally formed at the end of the air inlet. An air intake processing mechanism is provided at the air inlet. An air outlet is provided on the left side of the proportional pressure regulating valve.

[0008] As a preferred solution of the present invention, the wire clamping mechanism includes a hollow tube fixedly connected to the outer wall of the wire take-up shell, the wire harness passes through the hollow tube, the outer ring wall of the hollow tube is connected to a conical sleeve by a thread, the side wall of the hollow tube is slidably connected to a sliding pin, and the sliding pin is arranged through the hollow tube, one end of the sliding pin is in contact with the conical sleeve, the other end of the sliding pin is fixedly connected to a clamping block, and the clamping block is in contact with the wire harness, a travel limit ring is fixedly connected to the pin body of the sliding pin, the inner wall of the hollow tube is fixedly connected to a guide block, the guide block is slidably connected to the clamping block, a spring 1 is arranged inside the clamping block, one end of the spring 1 is fixedly connected to the guide block, and the other end of the spring 1 is fixedly connected to the inner surface of the clamping block. By screwing the conical sleeve, it can be moved axially in the hollow tube, thereby applying a radial thrust of the hollow tube to the sliding pin, and then the clamping block at the end of the sliding pin clamps and fixes the wire harness. This ensures that the redundant wire harness stored in the wire collection housing is not easy to slide out, ensuring the stable storage of the wire harness, and the extended length can be freely controlled.

[0009] As a preferred embodiment of the present invention, a hollow box is fixedly connected to the outer wall of the take-up housing and located above the hollow tube. A guide rod is fixedly connected to the inner top of the hollow box. A slide tube is slidably sleeved on the outer side of the rod body of the guide rod. The slide tube passes through the hollow box and is slidably connected to the hollow box. A clamping block is fixedly connected to the end of the slide tube, and the clamping block is clamped to the outer ring wall of the conical sleeve. A shift rod is fixedly connected to the outer side of the slide tube. The shift rod passes through the hollow box and is slidably connected to the hollow box. A second spring is provided inside the slide tube. One end of the second spring is fixedly connected to the guide rod, and the other end of the second spring is fixedly connected to the inner surface of the slide tube. The shift rod can be used to raise and lower the hollow slide tube, thereby controlling whether the clamping block at the end of the slide tube is clamped to the conical sleeve. When the clamping block is clamped to the conical sleeve, the conical sleeve can be protected from loosening.

[0010] As a preferred solution of the present invention, a first ball is provided on the rod body of the guide rod, and the first ball contacts the inner wall of the slide tube. By providing the first ball, the relative friction between the guide rod and the slide tube can be reduced.

[0011] The diaphragm of the present invention is connected with the air filter press of the present invention, and the diaphragm of the present invention is connected with the air filter press of the present invention. The air intake processing mechanism is installed at the air intake of the proportional pressure regulating valve through a connecting nozzle, and is connected to the air intake pipe through the air intake replacement nozzle in the air intake processing mechanism instead of the air intake. The gas in the air path is then filtered through the filter plate to prevent impurities from clogging the proportional pressure regulating valve. In addition, the cam is driven to rotate by the motor, and the cam and the spring cooperate to periodically make the guide seat and the dredging rod on the guide seat move horizontally repeatedly, so that the dredging rod is used to dredge the filter plate to prevent the filter plate from filtering, thereby ensuring the smooth flow of air intake.

[0012] As a preferred embodiment of the present invention, a support column is fixedly connected to the inner bottom of the hollow shell, and a second ball is provided on the top of the support column, and the second ball abuts against the cam. The arrangement of the support column and the second ball provides auxiliary support for the cam and the rotating shaft.

[0013] As a preferred embodiment of the present invention, a slag discharge port is provided at the bottom of the hollow shell, and the position of the slag discharge port corresponds to the position of the filter plate. A plug is slidably connected to the inside of the slag discharge port. The provision of the slag discharge port facilitates the discharge of impurities from the hollow shell.

[0014] As a preferred embodiment of the present invention, a connecting sleeve is slidably connected to the outer wall of the connecting nozzle, and the connecting sleeve is threadedly connected to the retaining ring. A sealing ring is embedded in the connecting sleeve, and the sealing ring contacts the retaining ring. The provision of the connecting sleeve facilitates the installation of the intake air processing mechanism at the air inlet, while the sealing ring ensures the sealing connection between the two.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) In the present invention, by setting up a pressure regulating module, a control unit, a human-machine interaction interface and a multi-channel integrated structure, high-precision and rapid regulation of the air brake pipeline pressure is achieved. In addition, the device adopts a modular multi-channel design, which is adaptable to complex test scenarios, effectively solving the problems of lag and large fluctuations in regulation of traditional solutions, and significantly improving test efficiency and data reliability.

[0017] (2) In the present invention, the proportional pressure regulating valve realizes the flexible storage and firm fixation of the wire harness by integrating the wire take-up housing and the wire clamping mechanism. The wire clamping mechanism adopts a threaded linkage structure of a conical sleeve and a sliding pin. The user only needs to rotate the conical sleeve to drive the clamping block to radially compress the wire harness, effectively preventing the wire harness from slipping during vibration or movement. At the same time, the additional clamping block anti-loosening mechanism automatically locks the conical sleeve through the spring 2, the sliding tube and the clamping block to prevent it from loosening in the reverse direction due to mechanical vibration, ensuring a long-lasting and reliable clamping force. This design not only solves the problem of traditional wire harnesses being messy and easy to loosen, but also allows the length of the wire harness to be freely adjusted according to the usage scenario, taking into account both practicality and safety.

[0018] (3) In the present invention, the air intake treatment mechanism innovatively combines the filtering and self-cleaning functions, intercepting gas impurities through the filter plate to prevent the proportional pressure regulating valve from being blocked. The motor drives the cam to periodically push the guide seat, driving the dredging rod to scrape the filter plate back and forth at high frequency, completely destroying the impurity accumulation layer. At the same time, the elastic reset function of the spring three ensures that the dredging rod returns to its position accurately after each action, forming a continuous cleaning cycle. This design significantly improves the working stability of the proportional pressure regulating valve and reduces the frequency of manual maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 For the present invention Figure 1 Schematic diagram of the intake air processing mechanism structure;

[0022] Figure 4 For the present invention Figure 1 Front cross-sectional view of

[0023] Figure 5 For the present invention Figure 4 Local structure magnification Figure 1 ;

[0024] Figure 6 For the present invention Figure 4 Local structure magnification Figure 2 ;

[0025] Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram.

[0026] Description of the numbers in the figure:

[0027] 1. Proportional pressure regulating valve; 2. Wiring harness; 3. Wire take-up housing; 4. Wire clamping mechanism; 5. Air inlet; 51. Retaining ring; 6. Air outlet; 7. Air intake treatment mechanism; 8. Interconnect terminal; 9. Connecting wire; 10. Cigarette lighter connector; 11. CAN output connector; 41. Hollow tube; 42. Conical sleeve; 43. Slide pin; 44. Clamping block; 45. Travel limit ring; 46. Guide block; 47. Spring 1; 48. Hollow box; 49. Guide rod; 410. Slide tube; 411 , block; 412, spring two; 413, ball one; 414, lever; 71, hollow shell; 72, connecting nozzle; 73, air intake nozzle; 74, filter plate; 75, guide sleeve; 76, guide frame; 77, spring three; 78, guide seat; 79, clearing rod; 710, motor; 711, rotating shaft; 712, cam; 713, support column; 714, ball two; 715, slag discharge port; 716, plug; 717, connecting sleeve; 718, sealing ring. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / 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 and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0031] Example:

[0032] See also Figure 1-7 , a pressure regulating device for an air brake control line for vehicle testing, including a pressure regulating module, a control unit, a human-machine interaction interface, and a data interaction module. The pressure regulating module, the control unit, the human-machine interaction interface, and the data interaction module are all electrically connected. The pressure regulating module includes a proportional pressure regulating valve 1 and a pressure sensor. The top of the proportional pressure regulating valve 1 is fixedly connected to a wire take-up housing 3. A wiring harness 2 is led out from the top of the proportional pressure regulating valve 1. The wiring harness 2 passes through the wire take-up housing 3 and extends to the outside of the wire take-up housing 3. A wire clamping mechanism 4 is provided on the wire take-up housing 3. The end of the wiring harness 2 is electrically connected to an interaction end 8. The bottom of the interaction end 8 is electrically connected to a connecting wire 9. The end of the connecting wire 9 is electrically connected to a cigarette lighter connector 10 and a CAN output connector 11. The right side of the proportional pressure regulating valve 1 is connected to an air inlet 5. The end of the air inlet 5 is integrally formed with a retaining ring 51. The air inlet 5 is provided with an air intake processing mechanism 7. The left side of the proportional pressure regulating valve 1 is connected to an air outlet 6.

[0033] In this embodiment, the control unit controls the pressure output through a closed-loop PID algorithm, and the control unit integrates a CAN bus interface to support data interaction with the test equipment. The proportional pressure regulating valve 1 has the characteristic of fast response speed.

[0034] For details, please refer to Figure 4 、 Figure 6 and Figure 7The wire clamping mechanism 4 includes a hollow tube 41 fixedly connected to the outer wall of the wire take-up shell 3, the wire harness 2 passes through the hollow tube 41, the outer ring wall of the hollow tube 41 is connected with a conical sleeve 42 by a thread, the side wall of the hollow tube 41 is slidably connected with a sliding pin 43, and the sliding pin 43 is arranged through the hollow tube 41, one end of the sliding pin 43 is in contact with the conical sleeve 42, the other end of the sliding pin 43 is fixedly connected with a clamping block 44, and the clamping block 44 is in contact with the wire harness 2, and a travel limiting ring 45 is fixedly connected to the pin body of the sliding pin 43, the inner wall of the hollow tube 41 is fixedly connected with a guide block 46, the guide block 46 is slidably connected to the clamping block 44, and a spring 47 is provided inside the clamping block 44, one end of the spring 47 is fixedly connected to the guide block 46, and the other end of the spring 47 is fixedly connected to the inner surface of the clamping block 44.

[0035] In this embodiment, by screwing the conical sleeve 42, it can be moved axially in the hollow tube 41, thereby applying a radial thrust of the hollow tube 41 to the sliding pin 43, and then the clamping block 44 at the end of the sliding pin 43 clamps and fixes the wire harness 2. This can ensure that the redundant wire harness 2 stored in the wire collection shell 3 is not easy to slide out, ensuring the stable storage of the wire harness 2, and the extended length can be freely controlled.

[0036] For details, please refer to Figure 6 as well as Figure 7 The outer wall of the take-up housing 3 is fixedly connected to a hollow box 48 above the hollow tube 41. The inner top of the hollow box 48 is fixedly connected to a guide rod 49. The outer side of the rod body of the guide rod 49 is slidably sleeved with a slide tube 410. The slide tube 410 passes through the hollow box 48 and is slidably connected to the hollow box 48. The end of the slide tube 410 is fixedly connected to a clamping block 411, and the clamping block 411 is clamped with the outer ring wall of the conical sleeve 42. The outer ring wall of the conical sleeve 42 is provided with a ring. The card slots distributed in a shaped array are used to snap into the card block 411, so that after the conical sleeve 42 is screwed, the card block 411 still has a snap-in position, and the outer side of the slide tube 410 is fixedly connected to a shift rod 414, and the shift rod 414 passes through the hollow box 48 and is slidably connected to the hollow box 48. A spring 2 412 is provided inside the slide tube 410, and one end of the spring 2 412 is fixedly connected to the guide rod 49, and the other end of the spring 2 412 is fixedly connected to the inner surface of the slide tube 410.

[0037] In this embodiment, the hollow slide tube 410 can be raised or lowered by the lever 414, thereby controlling whether the clamping block 411 at the end of the slide tube 410 is engaged with the conical sleeve 42. When the clamping block 411 is engaged with the conical sleeve 42, the conical sleeve 42 can be protected from loosening.

[0038] For details, please refer to Figure 7A ball 413 is provided on the rod body of the guide rod 49, and the ball 413 contacts the inner wall of the sliding tube 410.

[0039] In this embodiment, the relative friction between the guide rod 49 and the sliding tube 410 can be reduced by disposing the ball 1 413 .

[0040] For details, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5 The air intake processing mechanism 7 includes a hollow shell 71, the left side of the hollow shell 71 is connected to a connecting nozzle 72, the connecting nozzle 72 passes through the retaining ring 51 and is plugged into the air inlet 5, the right side of the hollow shell 71 is connected to an air intake replacement nozzle 73, the interior of the hollow shell 71 is fixedly connected to a filter plate 74, the side of the filter plate 74 away from the air intake replacement nozzle 73 is fixedly connected to two guide sleeves 75, each of the guide sleeves 75 is slidably connected to a guide frame 76, the ends of the two guide frames 76 are commonly fixedly connected to a guide seat 78, and the side of the guide seat 78 close to the filter plate 74 is fixedly connected to a dredging filter. The number and position of the clearing rods 79 and the dredging rods 79 correspond to the mesh of the filter plate 74. A spring three 77 is provided inside the guide sleeve 75. One end of the spring three 77 is fixedly connected to the guide frame 76, and the other end of the spring three 77 is fixedly connected to the inner surface of the guide sleeve 75. The top of the hollow shell 71 is fixedly installed with a motor 710. The output shaft of the motor 710 passes through the hollow shell 71 and is connected to the hollow shell 71 through a bearing. The end of the output shaft is fixedly connected to a rotating shaft 711. The end of the rotating shaft 711 is fixedly connected to a cam 712, and the cam 712 is in conflict with the guide seat 78.

[0041] In this embodiment, the air intake processing mechanism 7 is installed at the air intake port 5 of the proportional pressure regulating valve 1 through the connecting nozzle 72, and the air intake replacement nozzle 73 in the air intake processing mechanism 7 replaces the air intake port 5 to be connected to the air intake pipeline, and then the gas in the air path is filtered by the filter plate 74 to prevent impurities from clogging the proportional pressure regulating valve 1. In addition, the cam 712 is driven to rotate by the motor 710, and the cam 712 cooperates with the spring three 77 to periodically make the guide seat 78 and the dredging rod 79 on the guide seat 78 repeatedly move horizontally, so that the dredging rod 79 is used to dredge the filter plate 74 to prevent the filtering of the filter plate 74, thereby ensuring the smooth flow of air intake.

[0042] For details, please refer to Figure 5 The inner bottom of the hollow shell 71 is fixedly connected with a support column 713 , and the top of the support column 713 is provided with a second ball 714 , and the second ball 714 is in conflict with the cam 712 .

[0043] In this embodiment, the support column 713 and the ball bearing 714 are provided to provide auxiliary support for the cam 712 and the rotating shaft 711 .

[0044] For details, please refer to Figure 5 The bottom of the hollow shell 71 is connected to a slag discharge port 715 , and the position of the slag discharge port 715 corresponds to the position of the filter plate 74 . A plug 716 is slidably connected to the inside of the slag discharge port 715 .

[0045] In this embodiment, the slag discharge port 715 is provided to facilitate the discharge of impurities from the hollow shell 71 .

[0046] For details, please refer to Figure 5 The outer ring wall of the connecting nozzle 72 is slidably connected with a connecting sleeve 717, and the connecting sleeve 717 is connected to the retaining ring 51 through a thread. A sealing ring 718 is embedded in the interior of the connecting sleeve 717, and the sealing ring 718 is in conflict with the retaining ring 51.

[0047] In this embodiment, the connection sleeve 717 is provided to facilitate the installation of the air intake processing mechanism 7 at the air intake port 5, and the sealing ring 718 is used to ensure the sealing of the connection between the two.

[0048] Working principle: Step 1: When in use, the device is connected in series to the control air circuit, and the interactive end 8 is introduced into the cab through the cigarette lighter connector 10 to turn on the power. At the same time, the CAN output connector 11 is connected to the test equipment. Then, the pressure adjustment target value and the pressure establishment speed are input through the human-machine interface of the cab, and the proportional pressure regulating valve 1 is controlled to establish the target pressure value. After the pressure reaches the set value, the proportional pressure regulating valve 1 enters the pressure holding mode and continuously compensates for small leaks. Then the test is started. The test software can view the pressure holding status curve. In addition, the proportional pressure regulating valve 1 cooperates with the pressure sensor to feedback the pipeline pressure to the control unit in real time, and the PID algorithm is used to dynamically adjust the proportional valve opening;

[0049] The second step is to connect the air inlet 5 of the proportional pressure regulating valve 1 to the air inlet 5 of the proportional pressure regulating valve 1. The air inlet 5 of the proportional pressure regulating valve 1 is connected normally, and the connecting nozzle 72 of the air inlet processing mechanism 7 is inserted into the connecting sleeve 717 for thread locking. Then, the air inlet replacement nozzle 73 in the air inlet processing mechanism 7 is used to replace the air inlet 5 and connect the air inlet pipeline. In this way, the air inlet can enter the hollow shell 71 before entering the proportional pressure regulating valve 1, and the gas impurities are intercepted by the filter plate 74 to prevent the proportional pressure regulating valve 1 from being blocked. In addition, the motor 710 drives the cam 712 to periodically push the guide seat 78, and drives the dredging rod 79 on the guide seat 78 to scrape the filter plate 74 back and forth at high frequency, completely destroying the impurity accumulation layer on the filter plate 74. At the same time, the elastic reset function of the spring 3 77 ensures that the dredging rod 79 returns to its original position accurately after each action, forming a continuous cleaning cycle, ensuring the working stability of the proportional pressure regulating valve 1 and reducing the frequency of manual maintenance.

[0050] The user can also store the extra wire harness 2 in the wire take-up housing 3 and freely adjust the length of the wire harness 2 according to the usage scenario by simply pulling the slide tube 410 through the lever 414 so that the block 411 at the end of the slide tube 410 disengages from the conical sleeve 42 and releases the restriction on the conical sleeve 42. Subsequently, by screwing the conical sleeve 42, it can be moved axially in the hollow tube 41, thereby applying a radial thrust of the hollow tube 41 to the slide pin 43, thereby causing the clamping block 44 at the end of the slide pin 43 to reset under the action of the spring 47 and release the clamping fixation of the wire harness 2. Subsequently, the user can pull or pump the wire harness 2 to control its length outside the wire take-up housing 3. Finally, the above steps can be reversed, which not only ensures that the redundant wire harness 2 stored in the wire take-up housing 3 is not easy to slide out, but also ensures the stable storage of the wire harness 2, and the extended length can be freely controlled.

[0051] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, and these changes should be covered by the scope of protection of the present invention.

Claims

1. A pressure regulating device for an air brake control line for vehicle testing, comprising a pressure regulating module, a control unit, a human-machine interface, and a data exchange module, wherein the pressure regulating module, the control unit, the human-machine interface, and the data exchange module are all electrically connected, and characterized by: The pressure regulating module comprises a proportional pressure regulating valve (1) and a pressure sensor. The top of the proportional pressure regulating valve (1) is fixedly connected to a take-up housing (3). A wiring harness (2) is led out from the top of the proportional pressure regulating valve (1). The wiring harness (2) passes through the take-up housing (3) and extends to the outside of the take-up housing (3). A wire clamping mechanism (4) is provided on the take-up housing (3). The end of the wiring harness (2) is electrically connected to an interactive end (8). The bottom of the interactive end (8) is electrically connected to a connecting wire (9). The end of the connecting wire (9) is electrically connected to a cigarette lighter connector (10) and a CAN output connector (11). The right side of the proportional pressure regulating valve (1) is connected to an air inlet (5). The end of the air inlet (5) is integrally formed with a retaining ring (51). An air intake processing mechanism (7) is provided at the air inlet (5). The left side of the proportional pressure regulating valve (1) is connected to an air outlet (6).

2. The air brake control line pressure regulating device for vehicle testing according to claim 1, characterized in that: The wire clamping mechanism (4) comprises a hollow tube (41) fixedly connected to the outer wall of the wire take-up housing (3); the wire harness (2) passes through the hollow tube (41); the outer wall of the hollow tube (41) is connected to a conical sleeve (42) by a thread; the side wall of the hollow tube (41) is slidably connected to a sliding pin (43); and the sliding pin (43) is arranged to pass through the hollow tube (41); one end of the sliding pin (43) contacts the conical sleeve (42); the other end of the sliding pin (43) is fixedly connected to a clamping block (44); ), and the clamping block (44) contacts the wiring harness (2), a travel limit ring (45) is fixedly connected to the pin body of the sliding pin (43), a guide block (46) is fixedly connected to the inner wall of the hollow tube (41), the guide block (46) is slidably connected to the clamping block (44), a spring (47) is provided inside the clamping block (44), one end of the spring (47) is fixedly connected to the guide block (46), and the other end of the spring (47) is fixedly connected to the inner surface of the clamping block (44).

3. The air brake control line pressure regulating device for vehicle testing according to claim 2, characterized in that: The outer wall of the take-up shell (3) is fixedly connected to a hollow box (48) located above the hollow tube (41), the inner top of the hollow box (48) is fixedly connected to a guide rod (49), the outer side of the rod body of the guide rod (49) is slidably sleeved with a slide tube (410), the slide tube (410) passes through the hollow box (48) and is slidably connected to the hollow box (48), the end of the slide tube (410) is fixedly connected to a clamping block (411), and the clamping block (411) is fixedly connected to the outer end of the slide tube (410). 1) is clamped with the outer wall of the conical sleeve (42), the outer side of the sliding tube (410) is fixedly connected with a shift rod (414), the shift rod (414) passes through the hollow box (48) and is slidably connected with the hollow box (48), a second spring (412) is provided inside the sliding tube (410), one end of the second spring (412) is fixedly connected to the guide rod (49), and the other end of the second spring (412) is fixedly connected to the inner surface of the sliding tube (410).

4. The air brake control line pressure regulating device for vehicle testing according to claim 3, characterized in that: A ball bearing (413) is provided on the rod body of the guide rod (49), and the ball bearing (413) contacts the inner wall of the sliding tube (410).

5. The air brake control line pressure regulating device for vehicle testing according to claim 1, characterized in that: The air intake processing mechanism (7) comprises a hollow shell (71), the left side of the hollow shell (71) is connected to a connecting nozzle (72), the connecting nozzle (72) passes through the retaining ring (51) and is plugged into the air inlet (5), the right side of the hollow shell (71) is connected to an air intake replacement nozzle (73), the interior of the hollow shell (71) is fixedly connected to a filter plate (74), the side of the filter plate (74) away from the air intake replacement nozzle (73) is fixedly connected to two guide sleeves (75), the interior of each guide sleeve (75) is slidably connected to a guide frame (76), the ends of the two guide frames (76) are fixedly connected to a guide seat (78), and the guide seat (78) is close to the filter. A dredging rod (79) is fixedly connected to one side of the plate (74), a spring (77) is provided inside the guide sleeve (75), one end of the spring (77) is fixedly connected to the guide frame (76), and the other end of the spring (77) is fixedly connected to the inner surface of the guide sleeve (75), a motor (710) is fixedly installed on the top of the hollow shell (71), an output shaft of the motor (710) passes through the hollow shell (71) and is connected to the hollow shell (71) through a bearing, the end of the output shaft is fixedly connected to a rotating shaft (711), the end of the rotating shaft (711) is fixedly connected to a cam (712), and the cam (712) contacts the guide seat (78).

6. The air brake control line pressure regulating device for vehicle testing according to claim 5, characterized in that: The inner bottom of the hollow shell (71) is fixedly connected with a support column (713), and the top of the support column (713) is provided with a second ball (714), and the second ball (714) is in contact with the cam (712).

7. The air brake control line pressure regulating device for vehicle testing according to claim 5, characterized in that: The bottom of the hollow shell (71) is connected to a slag discharge port (715), and the position of the slag discharge port (715) corresponds to the position of the filter plate (74). A plug (716) is slidably connected inside the slag discharge port (715).

8. The air brake control line pressure regulating device for vehicle testing according to claim 5, characterized in that: The outer ring wall of the connecting nozzle (72) is slidably sleeved with a connecting sleeve (717), the connecting sleeve (717) is connected to the retaining ring (51) through a thread, a sealing ring (718) is embedded in the interior of the connecting sleeve (717), and the sealing ring (718) is in contact with the retaining ring (51).

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