Displacement detection device

Abstract

The utility model provides a displacement detection device which is used for detecting the displacement of an input rod in an EHB so as to verify displacement data output by a pedal travel sensor in the EHB. The device comprises: a carrier plate for fixing a first end of an EHB; the fixing mechanism is located on the carrier plate and used for switching and fixing different types of EHBs; and the control mechanism is used for controlling the displacement of an input rod in the EHB. The EHB pedal travel sensor verification device is simple in operation, compatible in verification of pedal travel sensors in various types of EHBs, and capable of reducing the number of detection devices and the verification cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile detection devices, in particular to a displacement detection device. Background Art

[0002] With the development of new energy vehicles, more and more vehicles are using hydraulic brake-by-wire systems (Electronic Hydraulic Brake System, EHB for short). EHB is mainly composed of an electronic pedal, an electronic control unit (ECU) and a hydraulic actuator. Among them, the electronic pedal is mainly composed of a brake pedal and a pedal travel sensor. The pedal travel sensor is used to detect the stroke of the pedal, and then converts the displacement signal into an electrical signal and transmits it to the ECU electronic control unit to achieve proportional regulation of the pedal stroke and braking force. The displacement data output by the pedal travel sensor affects the size of the braking force output. Therefore, the displacement data output by the pedal travel sensor must be strictly verified before the EHB leaves the factory.

[0003] At present, according to the level of EHB integration, it is divided into two forms: EBB+ESC (Electric Brake Booster+Electronic Stability Controller) and IBC (Integrated Braking Controller). In the prior art, the displacement detection device cannot be compatible with the pedal travel sensors of various forms of EHBs. Different types of EHBs require different displacement detection devices. The number of detection equipment required is large, resulting in the problem of high pedal travel sensor calibration costs. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of the utility model is to provide a displacement detection device that is compatible with and can calibrate pedal travel sensors of various types of EHBs, thereby reducing the number of detection devices and lowering calibration costs.

[0005] The embodiment of the utility model provides a displacement detection device for detecting the displacement of an input rod in an EHB brake-by-wire system to verify the displacement data output by a pedal travel sensor in the EHB. The device comprises:

[0006] A carrier plate, used for fixing one end of the EHB close to the carrier plate;

[0007] A fixing mechanism, located on the carrier plate, for switching and fixing different types of EHBs;

[0008] The control mechanism is used for controlling the displacement of the input rod.

[0009] The detection setting is easy to operate and can be compatible with the calibration of pedal travel sensors in various types of wire control brake systems, thereby reducing the calibration cost of the pedal travel sensors.

[0010] In some embodiments, the EHB includes a first type EHB and a second type EHB;

[0011] The fixing mechanism comprises:

[0012] A first fixing mechanism is located on the carrier; the first fixing mechanism includes a first vertical rod and a second vertical rod arranged opposite to each other along a first direction, and a first connecting rod; the first connecting rod is movably connected to an end of the first vertical rod away from the carrier and / or an end of the second vertical rod away from the carrier; the first vertical rod, the first connecting rod and the second vertical rod together form a first enclosing structure for fixing the end of the first type EHB away from the carrier;

[0013] A second fixing mechanism is located on the carrier; the second fixing mechanism includes a third vertical rod and a fourth vertical rod arranged opposite to each other along a second direction, and a second connecting rod, the second connecting rod is movably connected to an end of the third vertical rod away from the carrier and / or an end of the fourth vertical rod away from the carrier; the third vertical rod, the second connecting rod and the fourth vertical rod together form a second enclosing structure for fixing the end of the second type EHB away from the carrier; the first direction intersects with the second direction;

[0014] The control mechanism is used for controlling the displacement of the input rod to move along the third direction.

[0015] In these embodiments, the first type of EHB is represented by EBB, and the second type of EHB is represented by IBC. The first fixing mechanism fixes the top of the EBB in the first direction, and the second fixing mechanism fixes the top of the IBC in the second direction. The detection setting is easy to operate and can be compatible with the pedal travel sensors in two different types of wire control brake systems, thereby reducing the calibration cost of the pedal travel sensor.

[0016] In some embodiments, the first connecting rod includes a first sub-connecting rod and a second sub-connecting rod, the first end of the first sub-connecting rod is movably connected to an end of the first vertical rod away from the carrier plate, the first end of the second sub-connecting rod is movably connected to an end of the second vertical rod away from the carrier plate, and the second end of the first sub-connecting rod is fixedly connected to the second end of the second sub-connecting rod by a pin.

[0017] In these embodiments, the first connecting rod is a split structure, which specifically defines the connection method between the split first connecting rod and the first upright pole and the second upright pole; and the top and bottom ends of the EBB are fixed by the carrier plate, the first upright pole, the second upright pole and the first connecting rod, which can reduce the error during detection and improve the accuracy of the detection results.

[0018] In some embodiments, the first end of the first sub-connecting rod is rotatably connected to the first vertical rod via a first rotating shaft; the first end of the second sub-connecting rod is rotatably connected to the second vertical rod via a second rotating shaft.

[0019] In these embodiments, it is specifically shown that the first sub-connecting rod is rotatably connected to the first vertical rod via a first rotating shaft, and the second sub-connecting rod is rotatably connected to the second vertical rod via a second rotating shaft, so that the first connecting rod can be rotated by a certain angle without affecting the verification when the detection object is IBC.

[0020] In some embodiments, the first type EHB includes an oil pot, and a side of the first sub-connecting rod close to the carrier plate is in contact with an end of the oil pot away from the carrier plate.

[0021] In these embodiments, the first sub-connecting rod is fitted with the top of the oil pot of the EBB on one side close to the carrier plate, which can increase the contact area between the first sub-connecting rod and the top of the EBB and improve the fixing strength of the top of the EBB.

[0022] In some embodiments, the first end of the second connecting rod is rotatably connected to the third vertical pole via a third rotating shaft; the second end of the second connecting rod is detachably connected to the fourth vertical pole via a latch.

[0023] In these embodiments, the connection method between the second connecting rod and the second vertical rod and the third vertical rod is specifically defined, so that the second connecting rod can be rotated by a certain angle without affecting the detection when the object to be detected is an EBB.

[0024] In some embodiments, the second type EHB includes a hydraulic block, and the second connecting rod abuts against an end of the hydraulic block away from the carrier plate.

[0025] In these embodiments, a position where the second connecting rod is fixedly connected to an end of the second type EHB away from the carrier board is defined.

[0026] In some embodiments, the carrier board also includes a pedal travel sensor communication interface for receiving a sensing signal sent by a pedal travel sensor of the second type EHB.

[0027] In these embodiments, the test communication interface position when testing the second type EHB is specifically defined.

[0028] In some embodiments, the control mechanism includes a servo controller, a servo drive and a servo electric cylinder. The servo controller is communicatively connected to the servo drive, and the servo drive controls the servo electric cylinder to move along the third direction.

[0029] In these embodiments, the movement of the servo electric cylinder drives the movement displacement of the input rod along the third direction. The movement displacement of the servo electric cylinder along the third direction is theoretically the same as the movement displacement of the input rod along the third direction detected by the pedal sensor. If the displacement of the servo electric cylinder is different from the displacement output by the pedal sensor, the proportional coefficient needs to be adjusted so that the displacement output by the pedal sensor is the same as the displacement value detected by the electric cylinder. Then the pedal sensor calibration is completed.

[0030] In some embodiments, a protective shell is further included, wherein a cavity is provided inside the protective shell, and the control mechanism is placed in the cavity.

[0031] In these embodiments, it is used to protect the control mechanism and prevent the external environment from affecting the test of the control mechanism.

[0032] In some embodiments, the carrier is provided with fixing holes for cooperating with the mounting holes on the EHB to fix the EHB on the carrier.

[0033] In these embodiments, the specific fixing method of the EHB on the carrier is specifically defined; when the fixing hole coincides with the mounting hole, the bottom of the EHB can be fixed to the carrier by screws or bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0035] Figure 1 is a schematic diagram of a displacement detection device according to an embodiment of the utility model;

[0036] Figure 2 It is a schematic diagram of a first fixing mechanism and a second fixing mechanism of a displacement detection device according to an embodiment of the utility model;

[0037] Figure 3 This is a schematic diagram of a displacement detection device according to an embodiment of the utility model when detecting IBB;

[0038] Figure 4 This is a schematic diagram of a displacement detection device according to an embodiment of the utility model detecting an IBC;

[0039] Figure 5 yes Figure 4 Schematic diagram of IBC connecting to PTS communication interface.

[0040] Reference numerals:

[0041] 1 Carrier board 34 PTS communication interface

[0042] 11 Fixing hole 4 Control mechanism

[0043] 2 First fixing mechanism 41 Servo controller

[0044] 21 First vertical pole 42 Servo drive

[0045] 22 Second vertical pole 43 Servo cylinder

[0046] 23 first connecting rod 5 protective shell

[0047] 231 first sub-connecting rod 51 frame

[0048] 232 second sub-connecting rod 52 plate

[0049] 3 Second fixing mechanism 6 Hook

[0050] 31 Third upright pole 7 Push rod

[0051] 32 Fourth pole EBB Type 1 Braking-by-wire system

[0052] 33 Second connecting rod IBC Type II brake-by-wire system DETAILED DESCRIPTION

[0053] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0054] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In order to solve the problems in the prior art, the present application provides a displacement detection device for detecting the displacement of the input rod in the wire control brake system EHB to verify the displacement data output by the pedal stroke sensor in the EHB. In the present application, the displacement detection device includes a fixing mechanism located on the carrier plate for switching and fixing different types of EHB; and a control mechanism 4 for controlling the displacement of the input rod. The number of fixing mechanisms can be one or more, so as to achieve the switching of one or more types of EHB. The detection setting is easy to operate, and can be compatible with the verification of pedal stroke sensors in multiple different types of wire control brake systems, thereby reducing the verification cost of the pedal stroke sensor.

[0057] In the following description, an embodiment including two fixing mechanisms (ie, the first fixing mechanism 2 and the second fixing mechanism 3 described below) is taken as an example for illustration, but the present application is not limited thereto.

[0058] like Figures 1 to 5 As shown, the device includes a carrier plate 1 , a first fixing mechanism 2 located on the carrier plate 1 , a second fixing mechanism 3 located on the carrier plate 1 , and a control mechanism 4 .

[0059] The carrier plate 1 is used to fix the bottom of the brake-by-wire system EHB (the end close to the carrier plate 1); the brake-by-wire system EHB includes a first type EHB and a second type EHB. In this embodiment, the first type EHB is represented by EBB, which belongs to the two-box solution. The second type EHB is represented by IBC, which belongs to the one-box solution. The carrier plate 1 is provided with a fixing hole 11, and the IBC and the EBB are provided with mounting holes. When the fixing hole 11 coincides with the mounting hole, the bottom of the IBC and the EBB can be fixed to the carrier plate 1 by screws or bolts.

[0060] One-box is a highly integrated electronic booster and electronic stability control module to form a compact electronic hydraulic brake system. The main difference between it and tow-box is that the brake pedal and the brake master cylinder are decoupled, that is, the pressure built up by the master cylinder is completely driven by the booster motor, and the brake pedal force does not act on the master cylinder. The two-box solution is a non-decoupled system, and the pressure built up by the master cylinder is generated by the pedal force and the booster motor.

[0061] like Figure 2 and Figure 3As shown, the first fixing mechanism 2 is used to fix the top of the EBB (the end of the EBB away from the carrier 1); the first fixing mechanism 2 includes a first vertical rod 21 and a second vertical rod 22 arranged opposite to each other along a first direction, and a first connecting rod 23; the first connecting rod 23 is movably connected to the end of the first vertical rod 21 away from the carrier 1 and / or the end of the second vertical rod 22 away from the carrier 1; the first vertical rod 21, the first connecting rod 23 and the second vertical rod 22 are surrounded together to form a first surrounding structure for fixing the top of the EBB. Fixing the top and bottom of the EBB by the carrier 1, the first vertical rod 21, the second vertical rod 22 and the first connecting rod 23 can reduce the error during detection and improve the accuracy of the detection result.

[0062] like Figure 2 and Figure 4 As shown, the second fixing mechanism 3 is used to fix the top of the IBC (the end of the IBC away from the carrier 1). The second fixing mechanism 3 includes a third vertical rod 31 and a fourth vertical rod 32 arranged along the second direction and opposite to each other, and a second connecting rod 33. The second connecting rod 33 is movably connected to the end of the third vertical rod 31 away from the carrier 1 and / or the end of the fourth vertical rod away from the carrier 1; the third vertical rod 31, the second connecting rod 33 and the fourth vertical rod 32 are surrounded to form a second surrounding structure for fixing the top of the IBC. Among them, the first direction intersects with the second direction. Fixing the top and bottom ends of the EBB by the carrier 1, the third vertical rod 31, the fourth vertical rod 32 and the second connecting rod 33 can reduce the error during detection and improve the accuracy of the detection result.

[0063] The control mechanism 4 is used to control the displacement of the input rod along the third direction. Here, the first direction is one of the left and right directions or the front and back directions as viewed along the paper, the second direction is the other of the front and back directions or the left and right directions as viewed along the paper, and the third direction is the up and down direction as viewed along the paper.

[0064] The device in this embodiment is compatible with calibrating pedal travel sensors of two different types of EHBs. The first fixing mechanism 2 fixes the EBB in the first direction, and the second fixing mechanism 3 fixes the IBC in the second direction, thereby reducing the number of required detection equipment and reducing the calibration cost of the pedal travel sensor.

[0065] The first connecting rod 23 may be a segmented structure or an integrated structure. When the first connecting rod 23 is a segmented structure, refer to Figure 3 The structure shown. Figure 3As shown, the first connecting rod 23 includes a first sub-connecting rod 231 and a second sub-connecting rod 232, the first end of the first sub-connecting rod 231 is movably connected to the end of the first vertical rod 21 away from the carrier 1, the first end of the second sub-connecting rod 232 is movably connected to the end of the second vertical rod 22 away from the carrier 1, and the second end of the first sub-connecting rod 231 is fixedly connected to the second end of the second sub-connecting rod 232 by a latch. The first sub-connecting rod 231 and the second sub-connecting rod 232 can rotate to a certain angle without affecting the detection when the detection object is an IBC.

[0066] The first end of the first sub-connecting rod 231 is rotatably connected to the first vertical rod 21 via a first rotating shaft; the first end of the second sub-connecting rod 232 is rotatably connected to the second vertical rod 22 via a second rotating shaft.

[0067] When the first connecting rod 23 is an integrated structure, one end thereof is movably connected to the first vertical rod 21 or the second vertical rod 22, and the other end thereof is detachably connected to the first vertical rod 21 or the second vertical rod 22, so that the first connecting rod 23 can also be rotated by a certain angle without affecting the detection when the detection object is an IBC.

[0068] When checking the pedal travel sensor in the EBB, the EBB is first placed between the first upright pole 21 and the second upright pole 22, and then the top of the EBB is fixed by rotating the first sub-connecting rod 231 and the second sub-connecting rod 232. In this embodiment, the first sub-connecting rod 231 is a concave structure that fits the top of the oil pot of the EBB, which can increase the contact area between the first sub-connecting rod 231 and the top of the EBB oil pot and improve the fixing strength of the top of the EBB. The shape of the first connecting rod 23 is only for example, and its structure is not specifically limited.

[0069] The second connecting rod 33 may also be a segmented structure or an integrated structure. Figure 4 As shown, in this embodiment, the second connecting rod 33 is an integrated structure. The first end of the second connecting rod 33 is rotatably connected to the third vertical rod 31 through a third rotating shaft; the second end of the second connecting rod 33 is detachably connected to the fourth vertical rod 32 through a latch.

[0070] When checking the pedal travel sensor in the IBC, first place the IBC between the third upright pole 31 and the fourth upright pole 32, and then fix the top of the IBC by rotating the second connecting rod 33. The second connecting rod 33 abuts against the top of the IBC. Figure 4 As shown, in this embodiment, the second connecting rod 33 is in contact with the top of the hydraulic block of the IBC. The middle part of the second connecting rod 33 protrudes toward the end away from the IBC, which facilitates the connection of the wiring harness during IBC detection.

[0071] like Figure 5As shown, the carrier board 1 is also provided with a pedal travel sensor (PTS) communication interface 34 for receiving a sensing signal sent by the pedal travel sensor of the IBC.

[0072] The control mechanism 4 includes a servo controller 41, a servo driver 42 and a servo electric cylinder 43. The servo controller 41 is connected to the servo driver 42 in communication, and the servo driver 42 controls the movement of the servo electric cylinder 43. The servo controller 41 is an output device for the action command signal; the servo driver 42 is a device that receives the control command and drives the motor; the servo motor is a device that drives the control object and detects the state. The servo electric cylinder 43 is a modular product that integrates the servo motor and the lead screw, and converts the rotational motion of the servo motor into linear motion.

[0073] The control mechanism also includes a push rod 7, which is connected to the servo electric cylinder. Before testing, first pass the input rod of the EBB or IBC to be tested through the through hole on the carrier plate 1, so that the end of the input rod of the EBB or IBC that passes through the through hole is opposite to the push rod 7, and then fix the bottom and top of the EBB or IBC. Under the action of the servo electric cylinder, the movement of the push rod 7 promotes the movement displacement of the input rod along the third direction. The movement displacement of the push rod 7 along the third direction is theoretically the same as the movement displacement of the input rod along the third direction detected by the pedal sensor. If the displacement of the push rod 7 is different from the displacement output by the pedal sensor, the proportional coefficient needs to be adjusted so that the displacement output by the pedal sensor is the same as the movement displacement value detected by the electric cylinder, and the pedal sensor calibration is completed.

[0074] like Figure 1 As shown, the device also includes a protective shell 5, a cavity is provided inside the protective shell 5, and the control mechanism 4 is placed in the cavity. The protective shell 5 is used to protect the control mechanism 4 and prevent the external environment from affecting the test of the control mechanism 4. The protective shell 5 includes a support frame 51 and a plate 52 that closes the circumference of the support frame 51. The plate 52 can be transparent acrylic, which has a specific explosion-proof effect. A hook 6 is also provided in the cavity, which can be used to hang the wiring harness in the control mechanism 4 to prevent the wiring harness from being damaged.

[0075] The displacement detection device provided by the utility model has the following advantages:

[0076] The device in the present application is compatible with and can calibrate pedal travel sensors of multiple different types of EHBs, thereby reducing the number of required detection equipment and the calibration cost of the pedal travel sensors.

[0077] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A displacement detection device, characterized in that: The device is used to detect the displacement of the input rod in the EHB system to verify the displacement data output by the pedal travel sensor in the EHB. The device includes: A carrier plate, used for fixing one end of the EHB close to the carrier plate; A fixing mechanism, located on the carrier plate, for switching and fixing different types of EHBs; The control mechanism is used for controlling the displacement of the input rod.

2. The displacement detection device according to claim 1, characterized in that: The EHB includes a first type EHB and a second type EHB; The fixing mechanism comprises: A first fixing mechanism is located on the carrier; the first fixing mechanism includes a first vertical rod and a second vertical rod arranged opposite to each other along a first direction, and a first connecting rod; the first connecting rod is movably connected to an end of the first vertical rod away from the carrier and / or an end of the second vertical rod away from the carrier; the first vertical rod, the first connecting rod and the second vertical rod together form a first enclosing structure for fixing the end of the first type EHB away from the carrier; A second fixing mechanism is located on the carrier; the second fixing mechanism includes a third vertical rod and a fourth vertical rod arranged opposite to each other along a second direction, and a second connecting rod, the second connecting rod is movably connected to an end of the third vertical rod away from the carrier and / or an end of the fourth vertical rod away from the carrier; the third vertical rod, the second connecting rod and the fourth vertical rod together form a second enclosing structure for fixing the end of the second type EHB away from the carrier; the first direction intersects with the second direction; The control mechanism is used for controlling the displacement of the input rod to move along the third direction.

3. The displacement detection device according to claim 2, characterized in that: The first connecting rod includes a first sub-connecting rod and a second sub-connecting rod, the first end of the first sub-connecting rod is movably connected to an end of the first vertical rod away from the carrier plate, the first end of the second sub-connecting rod is movably connected to an end of the second vertical rod away from the carrier plate, and the second end of the first sub-connecting rod is fixedly connected to the second end of the second sub-connecting rod by a pin.

4. The displacement detection device according to claim 3, characterized in that: The first end of the first sub-connecting rod is rotatably connected to the first vertical rod via a first rotating shaft; the first end of the second sub-connecting rod is rotatably connected to the second vertical rod via a second rotating shaft.

5. The displacement detection device according to claim 4, characterized in that: The first type EHB includes an oil pot, and a side of the first sub-connecting rod close to the carrier plate is in contact with an end of the oil pot away from the carrier plate.

6. The displacement detection device according to claim 2, characterized in that: The first end of the second connecting rod is rotatably connected to the third vertical rod via a third rotating shaft; the second end of the second connecting rod is detachably connected to the fourth vertical rod via a latch.

7. The displacement detection device according to claim 6, characterized in that: The second type EHB includes a hydraulic block, and the second connecting rod abuts against an end of the hydraulic block away from the carrier plate.

8. The displacement detection device according to claim 7, characterized in that: The carrier board is also provided with a pedal travel sensor communication interface for receiving a sensing signal sent by the pedal travel sensor of the second type EHB.

9. The displacement detection device according to claim 2, characterized in that: The control mechanism includes a servo controller, a servo driver and a servo electric cylinder. The servo controller is in communication connection with the servo driver, and the servo driver controls the servo electric cylinder to move along the third direction.

10. The displacement detection device according to claim 9, characterized in that: It also includes a protective shell, a cavity is provided inside the protective shell, and the control mechanism is placed in the cavity.

11. The displacement detection device according to any one of claims 1 to 10, characterized in that: The carrier plate is provided with fixing holes for cooperating with the mounting holes on the EHB so as to fix the EHB on the carrier plate.

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