Calibration device and method for pedal displacement sensor of brake-by-wire system assembly

Abstract

The invention discloses a brake-by-wire system assembly pedal displacement sensor calibration device and method, and the device comprises a main body support and a screw rod lifting platform, the main body support is used for fixing a brake-by-wire system assembly, the screw rod lifting platform is provided with a push block assembly, and the screw rod lifting platform is used for driving the push block assembly to move. The push block assembly is used for measuring the brake-by-wire system assembly. According to the calibration device and method for the brake-by-wire system assembly pedal displacement sensor, through cooperation of the main body support and the lead screw lifting platform, the position of the pushing block assembly is conveniently adjusted to calibrate the brake-by-wire system assembly pedal displacement sensor, the calibration device and method are suitable for different brake-by-wire system assemblies, compatibility is high, and the calibration precision is high. The detection efficiency is high, and the high precision of calibration is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of manufacturing of automotive braking systems, and particularly relates to a calibration device and method for a pedal displacement sensor of an electronic control braking system assembly. Background Art

[0002] An electronic control braking system assembly, i.e., an electronic control braking system, refers to a system that transmits the driver's braking intention to a braking actuator through an electronic signal to achieve vehicle braking. The pedal displacement sensor in the electronic control braking system assembly needs to be calibrated with high precision to ensure the braking response sensitivity and safety.

[0003] The existing manual calibration tooling has low compatibility with the electronic control braking system assembly for calibrating the pedal displacement sensor of the electronic control braking system assembly, low efficiency, and low precision, and cannot meet the calibration precision of multi-level displacement points. Summary of the Invention

[0004] The object of the present invention is to provide a calibration device and method for a pedal displacement sensor of an electronic control braking system assembly, so as to solve the problems that the existing manual calibration tooling has low compatibility with the electronic control braking system assembly, low efficiency, and low precision, and cannot meet the calibration precision of multi-level displacement points.

[0005] To this end, in the first aspect of the present invention, there is provided a calibration device and method for a pedal displacement sensor of an electronic control braking system assembly, including a main body bracket and a screw rod lifting table. The main body bracket is used to fix the electronic control braking system assembly. A pushing block assembly is arranged on the screw rod lifting table. The screw rod lifting table is used to drive the pushing block assembly to move, and the pushing block assembly is used to measure the electronic control braking system assembly.

[0006] Preferably, the screw rod lifting table includes a screw rod guide rail and a lifting plate. The screw rod guide rail is used to drive the lifting plate to move, and the pushing block assembly is fixedly installed on the lifting plate.

[0007] Preferably, a scale line is arranged on the side wall of the screw rod guide rail.

[0008] Preferably, a displacement sensor is arranged on the lifting plate. Among them, the precision of the displacement sensor is 0.001 mm.

[0009] Preferably, a vertical fixing groove is arranged on the lifting plate.

[0010] Preferably, the pushing block assembly includes a push rod, a top head, a force sensor, and a fixing block. The push rod is fixedly connected to the top head, the top head is fixedly connected to the force sensor, and the force sensor is fixedly connected to the fixing block.

[0011] Preferably, a baffle is provided on one side of the main body bracket, and a clamping plate assembly is provided on the other side.

[0012] Preferably, the clamping plate assembly includes a clamping plate, a moving rod, a connecting rod, a handle, a housing and a fixed base. The fixed base is fixedly installed on the main body bracket, the housing is fixedly installed on the fixed base, the handle is rotatably connected to one end of the housing, the moving rod is slidably connected to the other end of the housing, one end of the connecting rod is rotatably connected to the handle, the other end is rotatably connected to the moving rod, and the clamping plate is fixedly connected to one end of the moving rod.

[0013] A calibration method for a pedal displacement sensor of a wire control brake system assembly is applied to the calibration device of the pedal displacement sensor of the wire control brake system assembly. The wire control brake system assembly is fixed on the main body bracket, and the push block assembly is driven to move by a screw jacking table, so that the push block assembly contacts the master cylinder piston push rod on the wire control brake system assembly. Then, the screw jacking table drives the push block assembly to retract to obtain a force-displacement curve and determine the zero position. When the push rod of the wire control brake system assembly is in a free state, a zero position mark is made.

[0014] Preferably, calibration points are selected according to the displacement values obtained by the displacement sensors installed on the lifting plate, and the calibration points are switched step by step and repeated for calibration until the calibration of all calibration points is completed.

[0015] Beneficial effects:

[0016] 1. The present invention provides a calibration device and method for a pedal displacement sensor of a wire control brake system assembly. By cooperating the main body bracket and the screw jacking table, it is convenient to adjust the position of the push block assembly to calibrate the pedal displacement sensor of the wire control brake system assembly, which is applicable to different wire control brake system assemblies, has high compatibility, high detection efficiency, and ensures high-precision calibration.

[0017] 2. In the push block assembly of the present invention, the inner hole of the top head is designed with a conical structure, which can automatically align the position of the push rod to the center of the top block during the process of the push block assembly advancing and contacting the push rod on the wire control brake system assembly.

[0018] 3. In the present invention, the wire control brake system assembly can be quickly clamped and fixed through the clamping plate assembly, replacing the traditional bolt locking, which is convenient to operate. Description of the drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the clamping wire control brake system assembly of a calibration device for a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0021] Figure 2 It is a cross-sectional view of the compression state of a calibration device for a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0022] Figure 3 It is a schematic structural diagram of the screw rod lifting table of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0023] Figure 4 It is a cross-sectional view of the push block assembly of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0024] Figure 5 It is a cross-sectional view of the wire control brake system assembly of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0025] Figure 6 It is a schematic structural diagram of the clamping plate assembly of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0026] Figure 7 It is a cross-sectional view of the clamping plate assembly of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0027] Figure 8 It is a schematic diagram of the detection moving direction of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0028] Figure 9 It is a detection schematic diagram of the displacement sensor and the force sensor of a pedal displacement sensor of a wire control brake system assembly in the present invention.

[0029] In the figure, 1 is the main body bracket, 11 is the baffle plate, 2 is the screw rod lifting table, 21 is the screw rod guide rail, 22 is the lifting plate, 23 is the scale line, 24 is the displacement sensor, 25 is the fixing groove, 3 is the pushing block assembly, 31 is the push rod, 32 is the top head, 33 is the force sensor, 34 is the fixing block, 4 is the wire-controlled braking system assembly, 41 is the adapter plate, 42 is the HCU valve block, 43 is the master cylinder piston, 44 is the master cylinder piston push rod, 45 is the first-stage spring assembly, 46 is the second-stage spring assembly, 47 is the piston ring, 48 is the pedal displacement sensor magnet assembly, 5 is the clamping plate assembly, 51 is the clamping plate, 52 is the moving rod, 53 is the connecting rod, 54 is the handle, 55 is the housing, and 56 is the fixing base. Detailed implementation mode

[0030] The content of the present invention can be more easily understood by referring to the following detailed description of the preferred implementation methods of the present invention and the included embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. When there is a contradiction, the definition in this specification shall prevail.

[0031] Embodiment 1:

[0032] As Figures 1-9 shown, in the first aspect of this embodiment, a calibration device for the pedal displacement sensor of the wire-controlled braking system assembly is provided, including a main body bracket 1 and a screw rod lifting table 2. The main body bracket 1 is used to fix the wire-controlled braking system assembly 4. A pushing block assembly 3 is arranged on the screw rod lifting table 2. The screw rod lifting table 2 is used to drive the pushing block assembly 3 to move. The pushing block assembly 3 is used to measure the wire-controlled braking system assembly 4. The pushing block assembly 3 advances or retracts the push rod of the wire-controlled braking system assembly 4 to achieve the calibration measurement of the wire-controlled braking system assembly 4.

[0033] Among them, as shown in the figure, the wire-controlled braking system assembly 4 is provided with an adapter plate 41. The adapter plate 41 is fixed on the HCU valve block 42. A master cylinder piston 43 is arranged inside the adapter plate 41. The master cylinder piston 43 is connected with a master cylinder piston push rod 44. The master cylinder piston push rod 44 extends outside the adapter plate 41. A first-stage spring assembly 45 and a second-stage spring assembly 46 are arranged inside the HCU valve block 42. The piston is connected with the first-stage spring assembly 45. A piston ring 47 is arranged on the piston. A pedal displacement sensor magnet assembly 48 is fixed on the piston ring 47. By pushing the master cylinder piston push rod 44, the master cylinder piston 43 is driven to compress the first-stage spring assembly 45 and the second-stage spring assembly 46 and move inward.

[0034] The screw rod lifting platform 2 includes a screw rod guide rail 21 and a lifting plate 22. The screw rod guide rail 21 is used to drive the lifting plate 22 to move, and the pushing block assembly 3 is fixedly installed on the lifting plate 22. A scale line 23 is provided on the side wall of the screw rod guide rail 21. A displacement sensor 24 is provided on the lifting plate 22. A vertical fixing groove 25 is provided on the lifting plate 22. Among them, the screw rod guide rail 21 drives the lifting plate 22 to move linearly on the guide rail through a handwheel and a screw rod. The displacement sensor 24 is preferably a contact displacement sensor 24, and the accuracy of the displacement sensor 24 is 0.001 mm. The pushing block assembly 3 is fixed by bolts passing through the fixing groove 25, and the position of the pushing block assembly 3 can be adjusted by adjusting the position of the bolts in the fixing groove 25, so as to adapt to different electronic brake system assemblies 4.

[0035] The pushing block assembly 3 includes a push rod 31, a top head 32, a force sensor 33 and a fixing block 34. The push rod 31 is fixedly connected to the top head 32, the top head 32 is fixedly connected to the force sensor 33, and the force sensor 33 is fixedly connected to the fixing block 34. The inner hole of the top head 32 of the pushing block assembly 3 is designed as a conical structure, which can automatically align the position of the push rod 31 to the center of the top block during the process of the pushing block assembly 3 advancing and contacting the push rod 31 on the electronic brake system assembly 4.

[0036] A baffle 11 is provided on one side of the main body bracket 1, and a clamping plate assembly 5 is provided on the other side. The electronic brake system assembly 4 is clamped and fixed by the cooperation of the baffle 11 and the clamping plate assembly 5.

[0037] The clamping plate assembly 5 includes a clamping plate 51, a moving rod 52, a connecting rod 53, a handle 54, a housing 55 and a fixed base 56. The fixed base 56 is fixedly installed on the main body bracket 1, the housing 55 is fixedly installed on the fixed base 56, the handle 54 is rotatably connected to one end of the housing 55, the moving rod 52 is slidably connected to the other end of the housing 55, one end of the connecting rod 53 is rotatably connected to the handle 54, and the other end is rotatably connected to the moving rod 52. The clamping plate 51 is fixedly connected to one end of the moving rod 52. By driving the connecting rod 53 to rotate through the handle 54, the moving rod 52 is driven to move linearly, so that the clamping plate 51 clamps the electronic brake system assembly 4.

[0038] It also includes a controller, which is electrically connected to the force sensor 33 and the displacement sensor 24, and is used to read the data of the force sensor 33 and the displacement sensor 24 and perform calibration calculations.

[0039] A calibration method for the pedal displacement sensor of an electronic brake system assembly is applied to a calibration device for the pedal displacement sensor of an electronic brake system assembly, including:

[0040] S1. Fix the electronic brake system assembly 4 on the main body bracket 1;

[0041] Place the wire brake system assembly 4 on the main body bracket 1, push the handle to make the clamping plate 51 clamp and fix the wire brake system assembly 4.

[0042] S2. Drive the push block assembly 3 to move through the screw rod lifting table 2, so that the push block assembly 3 contacts the master cylinder piston push rod 44 on the wire brake system assembly 4, and then drive the push block assembly 3 to retract by the screw rod lifting table 2 to obtain a force-displacement curve and determine the zero position.

[0043] Drive the lifting plate 22 to move linearly through the screw rod guide rail 21, so that the top block on the push block assembly 3 contacts the master cylinder piston push rod 44 of the wire brake system assembly 4. The force sensor 33 collects the force data received by the push block assembly 3, and the displacement sensor collects the displacement data of the current push block assembly 3, and sends the force data and displacement data to the controller to generate a force-displacement curve, and determine the zero position of the pedal displacement sensor according to the mutation point of the pressure curve.

[0044] S3. When the rocker of the wire brake system assembly 4 is in a free state, perform zero position marking.

[0045] S4. Select a calibration point according to the displacement value obtained by the displacement sensor 24, and gradually switch the calibration points and repeat the calibration until the calibration of all calibration points is completed.

[0046] Move the push block to push the master cylinder piston push rod 44 on the wire brake system assembly 4, and calibrate multiple calibration points in sequence, such as the calibration points at the positions of 10.000mm, 20.000mm, 30.000mm, and 40.000mm. The accuracy can reach 0.001mm to ensure the calibration accuracy.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A calibration device for a pedal displacement sensor of a brake-by-wire system assembly, characterized in that: It includes a main body bracket and a screw lifting platform, wherein the main body bracket is used to fix the wire control brake system assembly, the screw lifting platform is provided with a push block assembly, the screw lifting platform is used to drive the push block assembly to move, and the push block assembly is used to measure the wire control brake system assembly.

2. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 1, characterized in that: The screw lifting platform comprises a screw guide rail and a lifting plate, wherein the screw guide rail is used to drive the lifting plate to move, and the pushing block assembly is fixedly mounted on the lifting plate.

3. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 2, characterized in that: The side wall of the screw guide rail is provided with scale lines.

4. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 2, characterized in that: A displacement sensor is arranged on the lifting plate.

5. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 2, characterized in that: The lifting plate is provided with a vertical fixing groove.

6. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 1, characterized in that: The pushing block assembly comprises a push rod, a push head, a force sensor and a fixed block. The push rod is fixedly connected to the push head, the push head is fixedly connected to the force sensor, and the force sensor is fixedly connected to the fixed block.

7. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 1, characterized in that: A baffle is arranged on one side of the main frame, and a clamping plate assembly is arranged on the other side.

8. The calibration device for a pedal displacement sensor of a brake-by-wire system assembly according to claim 7, characterized in that: The splint assembly includes a splint, a movable rod, a connecting rod, a handle, a shell and a fixed base, the fixed base is fixedly mounted on the main body bracket, the shell is fixedly mounted on the fixed base, the handle is rotatably connected to one end of the shell, the movable rod is slidably connected to the other end of the shell, the two ends of the connecting rod are rotatably connected to the handle and the movable rod respectively, and the splint is fixedly connected to one end of the movable rod.

9. A calibration method for a brake-by-wire system assembly pedal displacement sensor, applied to a calibration device for a brake-by-wire system assembly pedal displacement sensor according to any one of claims 1 to 8, characterized in that: The brake-by-wire system assembly is fixed on the main support, and the push block assembly is driven to move by the screw lifting platform so that the push block assembly contacts the master cylinder piston push rod on the brake-by-wire system assembly, and then the screw lifting platform drives the push block assembly to retract, so as to obtain the force-displacement curve and determine the zero position; when the push rod of the brake-by-wire system assembly is in a free state, the zero position is marked.

10. The calibration method of a brake-by-wire system assembly pedal displacement sensor according to claim 9, characterized in that: The calibration points are selected according to the displacement values ​​obtained by the displacement sensors installed on the lifting plate, and the calibration points are switched step by step to repeat the calibration until the calibration of all the calibration points is completed.

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