A detection device for an electrically controlled brake pedal of a trolley bus

Abstract

The application relates to the technical field of electric car part detection, and particularly discloses a detection device for an electric control brake pedal of an electric car, which comprises a detection cabinet, a detection tool and an operation control system, the detection cabinet comprises an operation table, and the detection tool is arranged on the operation table; the detection tool comprises a bracket assembly in a frame type structure, a pressing assembly capable of fixing the electric control brake pedal on the bracket assembly, a loading assembly located at the side of the pressing assembly to simulate the stepping of the electric control brake pedal, and an air inlet and outlet test assembly located in the frame of the bracket assembly to test the air tightness of the electric control brake pedal. The detection device is compact in structure, can detect the air tightness and input and output characteristic performance of the electric control brake pedal, and improves the safety performance of the electric car.

Description

TECHNICAL FIELD

[0001] The application relates to a detection device and a detection method for an electric control brake pedal of a trolley, and belongs to the technical field of trolley component detection. BACKGROUND

[0002] With the vigorous promotion of the national energy-saving and emission-reducing policy and the requirement of environmental protection, new energy vehicles, such as hybrid vehicles, new energy pure electric vehicles and new energy intelligent rail trolleys, have been more and more widely produced and used. As an important executive component, the electric control brake pedal cooperates with the electric control brake valve to control the execution and release of the vehicle braking, and plays an extremely important role in the safe driving of the vehicle. Therefore, the performance of the electric control brake pedal needs to be detected before the electric control brake pedal is installed on the vehicle. At present, the following patents related to the detection test of the electric control brake pedal are involved:

[0003] 1. The patent number is "201910209384.0", and the patent name is "Automobile suspension type electronic accelerator pedal experimental device". The experimental device in the patent can measure the depression angle of the electronic accelerator pedal through a fixing support, a display panel, a marking indication mechanism, a marking plate and a locking mechanism.

[0004] 2. The patent number is "201920208688.0", and the patent name is "Automobile electronic throttle pedal multifunctional test bench". The experimental test bench can effectively reduce the labor intensity, and the structure is simple, convenient to install and disassemble, and can be suitable for different electronic throttle pedal performance tests.

[0005] 3. The patent number is "201020626166.1", and the patent name is "Automobile electronic throttle pedal performance and life test bench". The test bench has the advantages of simple structure, convenient testing, electric control, low noise, low energy consumption, low manufacturing and testing cost, and can be used for detecting the life of the electronic throttle pedal.

[0006] As can be seen from the above, the existing electric control brake pedal test device is mainly used for detecting the depression angle, service life or how to simplify the structure of the electric control brake pedal, and does not involve other safety performance detection and is not compact enough. Therefore, how to design a detection device for the safety performance of the electric control brake pedal, such as the air tightness performance and the static characteristic function, is an urgent problem to be solved at present. SUMMARY

[0007] The electric control brake pedal detection device of the electric car can detect the air tightness performance and input-output characteristic function of the electric control brake pedal through the detection tool, so as to improve the detection efficiency and accuracy of the electric control brake pedal and further improve the safety performance of the electric car.

[0008] To achieve the above object, the present application provides the following technical scheme: an electric control brake pedal detection device of an electric car, comprising a detection cabinet, a detection tool and an operation control system, the detection cabinet comprising an operation table, and the detection tool being placed on the operation table; the detection tool comprising a bracket assembly of a frame structure, a pressing assembly capable of fixing the electric control brake pedal on the bracket assembly, a loading assembly located on the side of the pressing assembly to simulate the stepping of the electric control brake pedal, and an air inlet and outlet test assembly located in the frame of the bracket assembly to test the air tightness performance of the electric control brake pedal; at least one set of air inlet and outlet test assemblies are arranged in the detection tool, and the air inlet and outlet test assembly comprises an air inlet member and an air outlet member, and a sealing member is arranged in the air inlet member and the air outlet member.

[0009] Preferably, the bracket assembly comprises an upper platform, a lower platform and a column supported between the upper platform and the lower platform, and a placing groove is formed in the upper platform; the electric control brake pedal comprises a support seat, a foot pedal located at the upper end of the support seat and a breather connected to the lower end of the foot pedal; the support seat is located above the placing groove and is fixed on the upper platform by the pressing assembly, the loading assembly is located on the upper platform and is located on the side of the foot pedal, and the air inlet and outlet test assembly is in communication with the breather between the upper platform and the lower platform.

[0010] Preferably, the breather comprises a plug connected to the air inlet member and the air outlet member, the air inlet member and the air outlet member each comprise a compression head, and the sealing member is arranged between the plug and the compression head; the sealing member is provided with a second air vent hole in communication with the plug, and the compression head is provided with a first air vent hole in communication with the second air vent hole; the side wall of the compression head of the air inlet member and the air outlet member is respectively provided with an air inlet and an air outlet in communication with the first air vent hole.

[0011] Preferably, the sealing member comprises a conical sealing head connected to the plug and a cylindrical sealing head connected to the compression head; the plug is provided with a conical connecting surface matched with the conical sealing head, and the taper of the conical sealing head is greater than the taper of the conical connecting surface, so that the sealing member can be clamped on the conical connecting surface through the conical sealing head and form a linear seal; the end surface of the cylindrical sealing head is provided with an internal thread, the compression head is provided with an external thread matched with the internal thread, and the cylindrical sealing head is screwed on the compression head; when the sealing member is connected to the compression head, a clamping member is arranged at the connection between the cylindrical sealing head and the compression head and clamped on the cylindrical sealing head.

[0012] Preferably, the sealing member comprises a conical sealing head connected with the plug and a cylindrical sealing head connected with the compression head; the plug is provided with a conical connecting surface matched with the conical sealing head, and the taper of the conical sealing head is greater than the taper of the conical connecting surface, so that the sealing member can be clamped on the conical connecting surface by the conical sealing head and form a linear seal; the end surface of the cylindrical sealing head is provided with a connecting groove for the connecting end of the compression head to extend into, the compression head is provided with a clamping groove for accommodating the groove wall of the connecting groove, and the connecting end and the connecting groove respectively comprise a conical connecting wall I and a conical connecting wall II matched with each other, and the taper of the conical connecting wall I is greater than the taper of the conical connecting wall II.

[0013] Preferably, the loading assembly comprises a pedal rocker and a driving motor for driving the pedal rocker to hit the pedal plate, and a speed reducer is arranged between the driving motor and the pedal rocker, and the pedal rocker is connected with the speed reducer through a connecting seat.

[0014] Preferably, the connecting seat comprises a middle connecting block and connecting rods I and II located on both sides of the middle connecting block; the connecting rod I is connected with the speed reducer, and the connecting rod II is provided with an angle sensor; the middle connecting block is provided with a middle connecting hole, and the pedal rocker is fixed in the middle connecting hole.

[0015] Preferably, the pedal rocker comprises a hitting disc for hitting the pedal plate, and the hitting disc is provided with a pressure sensor I; the upper platform is provided with bearing seats located on both sides of the middle connecting block, and the connecting rods I and II are provided with bearings I and II located in the bearing seats.

[0016] Preferably, the pressing assembly comprises at least two groups located outside the support seat, and the pressing assembly comprises a pressing cylinder and a pressing plate; the upper platform is provided with a through hole through which a power output rod II of the pressing cylinder passes, and the pressing plate is fixed to the upper end of the power output rod II and can move downward after the position of the support seat is fixed and stably press and fix the support plate on the upper platform.

[0017] Preferably, the air inlet and outlet testing assembly comprises a testing assembly I communicated with the bottom of the air passage and a testing assembly II communicated with the side of the air passage, and the air inlet and the air outlet in the testing assembly I and the testing assembly II are respectively connected with a first jacking cylinder and a second jacking cylinder through the lower end of the compression head; the lower platform is provided with a through hole through which a power output rod I of the first jacking cylinder passes, and the two vertical columns at the testing assembly II are provided with a connecting cross beam, and the second jacking cylinder is arranged on the connecting cross beam.

[0018] The beneficial effects of the present application are:

[0019] 1. The air intake and exhaust test component in this invention can be connected to the vent in the electric brake pedal and test the air tightness of the electric brake pedal; the two ends of the seal are respectively sealed to the plug of the vent and the compression head connected to the air source, which has good sealing performance, can ensure the accuracy of the sealing performance test of the electric brake pedal, and improve the safety performance of the tram.

[0020] 2. The loading component in this invention includes a speed reducer and a central connecting block, and the pedal rocker arm is provided with a strip-shaped fastening groove; the speed reducer can reduce the rotational speed, increase the output torque of the drive motor, improve the stability of the pedal rocker arm movement and the stability of the electronically controlled brake pedal performance detection; the pedal rocker arm can adjust the connection position with the central connecting block through the strip-shaped fastening groove, and then adjust the striking position of the striking plate in the pedal rocker arm according to the actual situation, thereby improving the versatility of the device.

[0021] 3. The angle sensor, the central connecting block, the reducer and the drive motor in this invention are coaxially arranged to ensure coaxiality, thereby further ensuring the stability of the loading and the stability of the simulated loading of the foot pedal by the foot rocker arm. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the testing cabinet in Example 1.

[0023] Figure 2 This is a schematic diagram of the axial structure of the detection device in Embodiment 1.

[0024] Figure 3 This is a front view of the detection device in Example 1.

[0025] Figure 4 for Figure 3 The left view.

[0026] Figure 5 This is a partial exploded view of the air intake component of test component one in Example 1.

[0027] Figure 6 This is a partial cross-sectional view of the air intake component of test component one in embodiment one.

[0028] Figure 7 for Figure 3 Top view.

[0029] Figure 8 This is a schematic diagram of the connector in Embodiment 1.

[0030] Figure 9 This is a partial schematic diagram of test component two in Example 1.

[0031] Figure 10 This is a partial cross-sectional view of test component one in Example 2.

[0032] Figure 11 This is a schematic diagram of the seal and compression head in Example 2.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Testing cabinet; 2. Operating table; 3. Testing fixture; 4. Support assembly; 5. Clamping assembly; 6. Loading assembly; 7. Air inlet; 8. Air outlet; 9. Sealing component; 10. Upper platform; 11. Lower platform; 12. Column; 13. Placement slot; 14. Support base; 15. Foot pedal; 16. Ventilation section; 17. Plug; 18. Compression head; 19. Pin hole; 20. Power output rod one; 21. Conical sealing head; 22. Cylindrical sealing head; 23. Conical connecting surface; 24. Clamping component; 25. Connecting end; 26. Connecting groove wall; 27. Clamping groove; 28. Conical connecting wall one; 29. ​​Conical connecting wall two; 30. Foot rocker arm; 31. Impact plate; 32. Pressure sensor one; 33. Drive motor; 34. Reduction gear. 35. Connecting seat; 36. Middle connecting block; 37. Middle connecting hole; 38. Connecting rod one; 39. Connecting rod two; 40. Angle sensor; 41. Bearing seat; 42. Bearing one; 43. Bearing two; 44. Pressing cylinder; 45. Pressing plate; 46. Power output rod two; 47. Test component one; 48. First clamping cylinder; 49. Test component two; 50. Second clamping cylinder; 51. Connecting crossbeam; 52. Display; 53. Display platform; 54. Mounting slot; 55. Positioning pin; 56. Movable fastening slot; 57. Leaving slot; 58. Connecting slot; 59. Receiving slot; 60. Power output rod three; 61. Compression plate; 62. Air inlet; 63. Air outlet; 64. Vent one; 65. Vent two. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-11 The present invention will be described in further detail below.

[0036] Example 1

[0037] This implementation example Figures 1-9 As shown, a testing device for an electric tram's electrically controlled brake pedal is used to test the airtightness and input / output characteristics of the pedal. Figure 1As shown, including detection cabinet 1, detection tooling 3 and operation control system, detection cabinet 1 including operation table 2 and display table 53, the middle of detection cabinet 1 extends inwardly to form operation table 2 and display table 53, display table 53 is located on the inner side of operation table 2, detection tooling 3 is placed on operation table 2 as a whole;Operation table 2 is provided with mounting groove 54, detection tooling 3 is placed in mounting groove 54 and fixed on operation table 2 as a whole;Operation control system includes industrial computer, display 52, servo system and gas circuit control system, display 52 is arranged on display table 53 to facilitate the operation and observation of operator, industrial computer, servo system and gas circuit control system are arranged in the cabinet body of detection cabinet 1, operation control system is used for overall control of detection tooling and electric control brake pedal.

[0038] As shown in Figure 2 , detection tooling 3 includes frame type support assembly 4, compression assembly 5 which can fix electric control brake pedal on support assembly 4, loading assembly 6 which is located on the side of compression assembly 5 to simulate the stepping of electric control brake pedal and air inlet and outlet test assembly which is located in the frame of support assembly 4 to test the air tightness of electric control brake pedal;Wherein support assembly 4 includes upper platform 10, lower platform 11 and column 12 supported between upper platform 10 and lower platform 11, upper platform 10 is provided with placing groove 13;Upper platform 10, lower platform 11 and column 12 together constitute frame type support assembly 4.

[0039] As shown in Figures 2-4 , electric control brake pedal includes support seat 14, foot pedal 15 located at the upper end of support seat 14 and air passage 16 connected to the lower end of foot pedal 15;Support seat 14 is located above placing groove 13, the width of support seat 14 is greater than the width of placing groove 13 and is fixed on upper platform 10 by compression assembly 5;The end corner of support seat 14 is provided with connecting hole matched with placing groove 13, first, the positioning pin 55 is placed in the connecting hole to connect the support seat 14 on the side of the upper platform 10 of placing groove 13, and then the support seat 14 is stably fixed by compression assembly 5 pressing on the support seat 14;Compression assembly 5 includes at least two groups located on the outer side of support seat 14, in this embodiment, two groups of compression assembly 5 are provided at the opposite corners of support seat 14, compression assembly 5 includes compression cylinder 44 and compression plate 45, compression cylinder 44 is located below upper platform 10, compression plate 45 is located above upper platform 10, upper platform 10 is provided with through hole for the power output rod two 46 of compression cylinder 44 to pass through, compression plate 45 is fixed on the upper end of power output rod two 46 and can move downward after the position of support seat 14 is fixed and stably press and fix support seat 14 on upper platform 10.

[0040] As shown in Figure 3 and Figure 5As shown, the loading assembly 6 is located on the upper platform 10 and beside the foot pedal 15, the loading assembly 6 includes a treading rocker arm 30 and a driving motor 33 driving the treading rocker arm 30 to hit the foot pedal 15, a speed reducer 34 is arranged between the driving motor 33 and the treading rocker arm 30, and the treading rocker arm 30 is connected with the speed reducer 34 through a connecting seat 35; the connecting seat 35 includes a middle connecting block 36 and connecting rods one 38 and two 39 arranged on both sides of the middle connecting block 36 respectively; the connecting rod one 38 is connected with the speed reducer 34, and the connecting rod two 39 is provided with an angle sensor 40; the angle sensor 40, the middle connecting block 36, the speed reducer 34 and the driving motor 33 are coaxially arranged to ensure the stability of the loading and the stability of the treading rocker arm 30 to the foot pedal 15; the middle connecting block 36 is provided with a middle connecting hole 37, and the treading rocker arm 30 is fixed in the middle connecting hole 37; the connecting end of the treading rocker arm 30 and the middle connecting hole 37 is provided with a movable fastening groove 56, and the middle connecting block is further provided with a pin hole 19 in communication with the middle connecting hole 37; by matching the movable fastening groove 56 with the pin hole 19, the position of the treading rocker arm 30 in the middle connecting hole 37 can be adjusted, and then the hitting position of the treading rocker arm 30 to the foot pedal 15 can be adjusted according to actual needs; after the position of the treading rocker arm 30 is adjusted, a fastening pin is used to pass through the pin hole 19 and the movable fastening groove 56 and fix the treading rocker arm 30 in the middle connecting hole 37; the upper platform 10 is provided with a displacement groove 57 below the middle connecting block 36 to provide accommodation space for the movement of the treading rocker arm 30 and avoid interference; the treading rocker arm 30 includes a hitting disc 31 hitting the foot pedal 15, and the hitting disc 31 is provided with a pressure sensor one 32; the upper platform 10 is provided with bearing seats 41 on both sides of the middle connecting block 36, the connecting rod one 38 passes through the shaft hole of the right bearing seat 41 and is connected with the speed reducer 34, the connecting rod two 39 passes through the shaft hole of the left bearing seat 41 and is connected with the angle sensor 40, and the connecting rod one 38 and the connecting rod two 39 are provided with bearings one 42 and two 43 located in the bearing seats 41.

[0041] As shown in the figure, Figures 2-5 The air inlet and outlet test assembly is in communication with the air passage 16 between the upper platform 10 and the lower platform 11; the detection tool 3 is provided with at least one set of air inlet and outlet test assembly, the air inlet and outlet test assembly includes an air inlet member 7 and an air outlet member 8, and the air inlet member 7 and the air outlet member 8 are provided with a sealing member 9, and the sealing member 9 in the embodiment is a rubber pad structure; the air inlet member 7 and the air outlet member 8 both include a compression head 18, the air passage 16 includes a plug 17 connected with the air inlet member 7 and the air outlet member 8, and the sealing member 9 is arranged between the plug 17 and the compression head 18; as Figure 6As shown, the sealing member 9 is provided with a vent hole two 65 communicated with the plug 17, and the compression head 18 is provided with a vent hole one 64 communicated with the vent hole two 65; the side wall of the compression head 18 of the air inlet member 7 and the air outlet member 8 is respectively provided with an air inlet 62 and an air outlet 63 communicated with the vent hole one 64, and the air inlet 62 is communicated with the air source; the vent part 16 is further provided with a control electromagnetic valve for controlling whether the air source charges the vent part 16; when testing, air is inhaled through the air inlet 62 and exhaled through the air outlet 63; the air inlet and outlet testing assembly in the embodiment includes a testing assembly one 47 communicated with the bottom of the vent part 16 and a testing assembly two 49 communicated with the side of the vent part 16, and the testing assembly one 47 and the testing assembly two 49 are respectively connected with a first tightening cylinder 48 and a second tightening cylinder 50 for tightly pressing the sealing member 9 between the plug 17 and the compression head 18, the first tightening cylinder 48 is connected with the lower end of the compression head 18 in the testing assembly one 47, and the second tightening cylinder 50 is connected with the lower end of the compression head 18 in the testing assembly two 49; the lower platform 11 is provided with a through hole for the power output rod one 20 of the first tightening cylinder 48 to pass through; the connecting beam 51 is arranged between the two vertical columns 12 at the testing assembly two 49, and the connecting beam 51 is provided with a receiving groove 59, and the second tightening cylinder 50 is arranged in the receiving groove 59.

[0042] As shown, Figure 5 the sealing member 9 includes a conical sealing head 21 connected with the plug 17 and a cylindrical sealing head 22 connected with the compression head 18; the plug 17 is provided with a conical connecting surface 23 matched with the conical sealing head 21, the taper α of the conical sealing head 21 is greater than the taper β of the conical connecting surface 23, and the sealing member 9 can be clamped on the conical connecting surface 23 through the conical sealing head 21 and form a linear seal to prevent air leakage at the connection between the sealing member 9 and the plug 17; the end face of the cylindrical sealing head 22 is provided with an internal thread, and the compression head 18 is provided with an external thread matched with the internal thread, and the cylindrical sealing head 22 is screwed on the compression head 18; after the sealing member 9 is connected with the compression head 18, a clamping member 24 clamped on the cylindrical sealing head 22 is arranged at the connection between the cylindrical sealing head 22 and the compression head 18, and the clamping member 24 in the embodiment is an annular clamp; as shown, Figure 8 the power output rod three 60 of the second tightening cylinder 50 is provided with a compression plate 61 between the compression head 18, and the width of the compression plate 61 is greater than the distance between the compression head 18 between the air inlet member 7 and the air outlet member 8, and the compression plate 18 can enhance the stability of the connection and force receiving between the power output rod three 60 and the compression head 18.

[0043] Embodiment:

[0044] Non-working sealing performance test: when the foot pedal 15 is in Figure 1When the control solenoid valve is set to the default position shown in the figure, the control solenoid valve is set to the inflation position, and the air source inflates the air inlet 62. After the inflation is completed, the control solenoid valve is set to the cut-off position, and after 1-5 minutes of pressure stabilization, the pressure drop of the pressure sensor two on the air path in the next 5 minutes is recorded and compared with the non-working leakage air pressure value of the test electric control brake pedal. When the actual pressure drop is less than the non-working leakage air pressure value, it is determined to be qualified.

[0045] Working sealing performance test: when the foot pedal 15 is in the Figure 1 When the control solenoid valve is set to the default position shown in the figure, the control solenoid valve is set to the inflation position, and the air source inflates the air inlet 62. After the inflation is completed, the control solenoid valve is set to the cut-off position, and after 1-5 minutes of pressure stabilization, the pressure drop of the pressure sensor two on the air path in the next 5 minutes is recorded and compared with the non-working leakage air pressure value of the test electric control brake pedal. When the actual pressure drop is less than the non-working leakage air pressure value, it is determined to be qualified.

[0046] Input-output characteristic test: set the control solenoid valve to the inflation position, and the air source inflates the air inlet 62. The simulated pedal load is applied to the foot pedal 15 through the striking disc 31, and the foot pedal 15 moves at a speed of (0.4±0.1) mm / s from zero stroke to full stroke. At the same time, the air output, pedal force, etc. are recorded, and the zero angle, pre-over distance, zero voltage angle, etc. are measured and compared with the standard curve for judgment.

[0047] Example two

[0048] As Figures 10-11 shown, the difference between this embodiment and example one is that the end face of the cylindrical sealing head 22 is provided with a connecting groove 58 for the extension of the connecting end 25 of the compression head 18, and the compression head 18 is provided with a clamping groove 27 for accommodating the connecting groove wall 26. The connecting end 25 and the connecting groove 58 respectively include tapered connecting wall one 28 and tapered connecting wall two 29 which cooperate with each other. The taper γ of the tapered connecting wall one 28 is greater than the taper θ of the tapered connecting wall two 29, so that the tapered connecting wall one 28 can be clamped on the tapered connecting wall two 29 and form a linear seal, preventing air leakage at the connection between the sealing element 9 and the compression head 18.

[0049] The above examples are only explanations of the present application, which are not limitations of the present application, and the person skilled in the art can make modifications to the embodiments of the present application without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A detection device of an electrically controlled brake pedal of a trolley car, comprising a detection cabinet (1), a detection tool (3) and an operation control system, characterized in that, The detection cabinet (1) comprises an operation table (2), and a detection tool (3) is arranged on the operation table (2) as a whole; the detection tool (3) comprises a bracket assembly (4) of a frame type structure, a pressing assembly (5) capable of fixing an electric control brake pedal on the bracket assembly (4), a loading assembly (6) located at a side of the pressing assembly (5) to simulate the stepping of the electric control brake pedal, and an air inlet and outlet testing assembly located in a frame of the bracket assembly (4) to test the air tightness of the electric control brake pedal; at least one set of air inlet and outlet testing assemblies are arranged in the detection tool (3), the air inlet and outlet testing assembly comprises an air inlet part (7) and an air outlet part (8), and sealing parts (9) are arranged in the air inlet part (7) and the air outlet part (8); the bracket assembly (4) comprises an upper platform (10), a lower platform (11) and a stand column (12) supported between the upper platform (10) and the lower platform (11), and a placing groove (13) is formed in the upper platform (10); the electric control brake pedal comprises a supporting seat (14), a foot pedal (15) located at an upper end of the supporting seat (14) and a ventilation part (16) connected to a lower end of the foot pedal (15); the supporting seat (14) is located above the placing groove (13) and is fixed on the upper platform (10) by the pressing assembly (5), the loading assembly (6) is located on the upper platform (10) and at a side of the foot pedal (15), and the air inlet and outlet testing assembly is communicated with the ventilation part (16) between the upper platform (10) and the lower platform (11); the ventilation part (16) comprises a plug (17) connected with the air inlet part (7) and the air outlet part (8), the air inlet part (7) and the air outlet part (8) each comprise a compression head (18), and the sealing part (9) is arranged between the plug (17) and the compression head (18); the sealing part (9) is provided with a ventilation hole two (65) communicated with the plug (17), and the compression head (18) is provided with a ventilation hole one (64) communicated with the ventilation hole two (65); the side wall of the compression head (18) in the air inlet part (7) and the air outlet part (8) is respectively provided with an air inlet (62) and an air outlet (63) communicated with the ventilation hole one (64); the sealing part (9) comprises a conical sealing head (21) connected with the plug (17) and a cylindrical sealing head (22) connected with the compression head (18); the plug (17) is provided with a conical connecting surface (23) matched with the conical sealing head, and the taper α of the conical sealing head (21) is greater than the taper β of the conical connecting surface (23), so that the sealing part (9) can be clamped on the conical connecting surface (23) through the conical sealing head (21) and form linear sealing; the end face of the cylindrical sealing head (22) is provided with an internal thread, the compression head (18) is provided with an external thread matched with the internal thread, and the cylindrical sealing head (22) is threadedly connected to the compression head (18); when the sealing part (9) is connected to the compression head (18), a clamping part (24) clamped on the cylindrical sealing head (22) is arranged at the connecting position of the cylindrical sealing head (22) and the compression head (18); or the sealing part (9) comprises the conical sealing head (21) connected with the plug (17) and the cylindrical sealing head (22) connected with the compression head (18).The plug (17) is provided with a conical connecting surface (23) matched with the conical sealing head. The taper α of the conical sealing head (21) is greater than the taper β of the conical connecting surface (23), so that the sealing member (9) can be clamped on the conical connecting surface (23) through the conical sealing head (21) and form a linear seal. The end surface of the cylindrical sealing head (22) is provided with a connecting groove (58) for the connecting end (25) of the compression head (18) to extend into. The compression head (18) is provided with a clamping groove (27) for accommodating the connecting groove wall (26). The connecting end (25) and the connecting groove (58) respectively comprise a conical connecting wall one (28) and a conical connecting wall two (29) matched with each other. The taper γ of the conical connecting wall one (28) is greater than the taper θ of the conical connecting wall two (29).

2. The detection device of an electrically controlled brake pedal of an electric vehicle according to claim 1, characterized in that, The loading assembly (6) comprises a pedal rocker arm (30) and a driving motor (33) for driving the pedal rocker arm (30) to hit the pedal (15), and a speed reducer (34) is arranged between the driving motor (33) and the pedal rocker arm (30), and the pedal rocker arm (30) is connected with the speed reducer (34) through a connecting seat (35).

3. The electrically controlled brake pedal detection apparatus for electric vehicles according to claim 2, characterized by The connecting seat (35) comprises a middle connecting block (36) and a connecting rod one (38) and a connecting rod two (39) arranged on both sides of the middle connecting block (36) respectively, the connecting rod one (38) is connected with the speed reducer (34), the connecting rod two (39) is provided with an angle sensor (40), the middle connecting block (36) is provided with a middle connecting hole (37), and the pedal rocker arm (30) is fixed in the middle connecting hole (37).

4. The electrically controlled brake pedal detection apparatus for electric vehicles according to claim 3, characterized by The pedal rocker arm (30) comprises a hitting disc (31) for hitting the pedal (15), and the hitting disc (31) is provided with a pressure sensor one (32); the upper platform (10) is provided with a bearing seat (41) arranged on both sides of the middle connecting block (36), and the connecting rod one (38) and the connecting rod two (39) are provided with a bearing one (42) and a bearing two (43) arranged in the bearing seat (41).

5. The electrically controlled brake pedal detection apparatus for electric vehicles according to claim 4, characterized by The pressing assembly (5) comprises at least two groups arranged outside the support seat (14), and the pressing assembly (5) comprises a pressing cylinder (44) and a pressing plate (45); the upper platform (10) is provided with a through hole through which a power output rod two (46) of the pressing cylinder (44) passes, and the pressing plate (45) is fixed to the upper end of the power output rod two (46) and can be moved downward after the position of the support seat (14) is fixed and stably press the support plate to be fixed on the upper platform (10).

6. The electrically controlled brake pedal detection apparatus for electric vehicles according to claim 5, wherein The air inlet and outlet testing assembly comprises a testing assembly one (47) communicated with the bottom of the air passage (16) and a testing assembly two (49) communicated with the side of the air passage (16), the air inlet part (7) and the air outlet part (8) in the testing assembly one (47) and the testing assembly two (49) are respectively connected with a first jacking cylinder (48) and a second jacking cylinder (50) through the lower end of the compression head (18); the lower platform (11) is provided with a through hole through which a power output rod one (20) of the first jacking cylinder (48) passes, two vertical columns (12) between the testing assembly two (49) are provided with a connecting cross beam (51), and the second jacking cylinder (50) is arranged on the connecting cross beam (51).

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