Automatic rapid calibration device for brake force sensor of electronic control mechanical brake system

Abstract

The utility model relates to an automatic rapid calibration device for a brake force sensor of an electric control mechanical brake system, which comprises a conveying mechanism, a plurality of temperature boxes and a pressure measuring mechanism, the conveying mechanism is used for automatically conveying a sensor to be measured, and the temperature boxes are arranged at intervals along the conveying direction of the conveying mechanism; and the plurality of pressure measuring mechanisms are respectively arranged on the temperature boxes. According to the calibration device, the plurality of temperature boxes are arranged at the same time to provide test environments with different temperatures, and the rotary driving source is matched with the ball screw and the screw nut to drive the moving plate to linearly move along the track plate, so that a to-be-tested brake force sensor at the top of the moving plate is sequentially conveyed into each temperature box and is detected through the pressure measuring mechanism; a telescopic driving source, a floating connecting rod, a pressure sensor and a pressure head of the pressure measuring mechanism are matched to detect the sensor to be measured and realize automatic zero clearing of reading; the time for waiting for the temperature change of the incubator is saved, the automation degree is high, and the calibration efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical automation technology, and in particular to an automated rapid calibration device for the braking force sensor of an electromechanical braking system. Background Technology

[0002] EMB (Electromechanical Braking) system is an advanced braking technology that replaces traditional hydraulic braking with electric motor drive. It boasts advantages such as fast response, high precision, and compact structure, and is widely used in new energy vehicles, intelligent driving, and other fields. The brake force sensor is the core component of the EMB system, responsible for real-time monitoring of the braking force and feeding it back to the control system, directly affecting braking safety and control accuracy. Over long-term use, the sensor may experience measurement deviations due to mechanical wear, temperature drift, or electromagnetic interference, requiring periodic calibration to ensure the accuracy of its output signal.

[0003] Existing calibration equipment typically uses a single temperature chamber for high-low temperature conversion. Since the transition time from high temperature to low temperature is relatively long, it wastes a lot of time. In addition, the existing calibration equipment has a low degree of automation and requires a lot of manual intervention, resulting in low calibration efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that existing calibration equipment usually uses a single temperature chamber for high and low temperature conversion. Since the conversion time from high temperature to low temperature is long, a lot of time is wasted. In addition, the existing calibration equipment has a low degree of automation and requires a lot of manual intervention, resulting in low calibration efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides an automated and rapid calibration device for the braking force sensor of an electromechanical braking system, comprising:

[0006] A conveying mechanism includes a support frame, a track plate, a rotary drive source, a movable plate, and a ball screw. The track plate is horizontally arranged by multiple supports. A through groove extending along the length of the track plate is opened on its top. A bearing seat is installed at each end of the through groove. The ball screw is coaxially arranged in the through groove and its two ends are rotatably connected to the two bearing seats respectively. The movable plate is slidably arranged on the top of the track plate along its length. The movable plate spans the through groove and is connected to the ball screw through a screw nut. The rotary drive source is used to drive the ball screw to rotate.

[0007] The incubator is provided in multiple locations and spaced apart along the length of the track plate. Each incubator has two door openings on its side for the track plate to pass through, and each incubator has an observation window on its side.

[0008] The pressure measuring mechanism comprises multiple sets, each including a telescopic drive source, a floating link, a pressure sensor, and a pressure head. Each telescopic drive source is vertically mounted on the top of a temperature chamber. The output end of each telescopic drive source extends into the temperature chamber and corresponds to the position of the through slot. Each output end of the telescopic drive source has a mounting hole coaxially formed. A floating link is slidably mounted in the mounting hole. One end of the floating link extends out of the mounting hole and is coaxially connected to the detection end of the pressure sensor. The other end of the pressure sensor is coaxially connected to the pressure head.

[0009] In one embodiment of this utility model, a floating support mechanism is further included, which is provided in multiple sets. Each set of floating support mechanisms includes a base and rollers. The bottom of the through groove is provided with multiple grooves arranged at intervals along its length. Each base is floatingly disposed in each of the grooves. Two rollers parallel to the ball screw are rotatably disposed on the base. The two rollers are arranged on both sides of the ball screw and roll in contact with it. Two sets of rollers are symmetrically disposed on both sides of the base.

[0010] In one embodiment of this utility model, two vertical limiting plates are provided at intervals at the bottom of the movable plate. Both limiting plates are trapezoidal plates and their lower bottoms are connected to the bottom of the movable plate. At the same time, the two limiting plates are respectively in close contact with the two side walls of the through groove and correspond to the positions of the two sets of rollers.

[0011] In one embodiment of this utility model, the mounting hole is a T-shaped hole, and the floating connecting rod is a T-shaped column structure that matches the shape of the mounting hole.

[0012] In one embodiment of this utility model, each of the incubators is provided with two automatic doors for closing the two door openings respectively.

[0013] In one embodiment of this utility model, a controller is included, which is connected to the rotation drive source, the telescopic drive source and the automatic door respectively.

[0014] In one embodiment of this invention, the range of the pressure sensor is greater than the maximum calibrated pressure value of the brake force sensor.

[0015] In one embodiment of the present invention, the top of the movable plate is provided with a receiving groove for fixing the braking force sensor.

[0016] In one embodiment of this utility model, the telescopic drive source is an electric telescopic cylinder.

[0017] In one embodiment of this utility model, the rotation drive source is a servo motor.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] This utility model discloses an automated rapid calibration device for a braking force sensor in an electromechanical braking system. It includes a conveying mechanism, a temperature chamber, and a pressure measuring mechanism. The conveying mechanism includes a track plate and a ball screw rotatably mounted on the track plate and driven by a rotary drive source. A movable plate connected to the ball screw via a screw nut is slidably mounted on the track plate. Multiple temperature chambers are provided and spaced apart along the length of the track plate. Each temperature chamber has two coaxial openings on its side for the track plate to pass through, and each temperature chamber has an observation window on its side. Multiple pressure measuring mechanisms are provided and installed on each temperature chamber. Each pressure measuring mechanism includes a telescopic drive source, a floating connecting rod, a pressure sensor, and a pressure head. The output end of the telescopic drive source extends vertically into the temperature chamber, and each output end of the telescopic drive source has a mounting hole. A floating connecting rod is slidably mounted in the mounting hole. The free end of the floating connecting rod is connected to the detection end of the pressure sensor, and the other end of the pressure sensor is coaxially connected to the pressure head. This invention provides a rapid calibration device that simultaneously sets up multiple temperature chambers to provide testing environments at different temperatures. A rotary drive source, in conjunction with a ball screw and screw nut, drives a moving plate to move linearly along a track plate, thereby sequentially conveying the brake force sensor to be tested from the top of the moving plate to each temperature chamber. The sensor is then tested by a pressure measuring mechanism. The pressure measuring mechanism, with its telescopic drive source, floating linkage, pressure sensor, and pressure head, works together to test the sensor and automatically zero out the reading. This eliminates the time spent waiting for the temperature of the temperature chambers to change, resulting in a high degree of automation and effectively improving calibration efficiency. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the automated rapid calibration device for the braking force sensor of the electromechanical braking system according to a preferred embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the conveying mechanism of the automated rapid calibration device for the brake force sensor of the electromechanical braking system according to a preferred embodiment of this utility model.

[0023] Figure 3 This is a schematic diagram of the temperature chamber of the automatic rapid calibration device for the braking force sensor of the electromechanical braking system according to a preferred embodiment of this utility model.

[0024] Figure 4 This is a schematic diagram of the overall structure of the pressure measuring mechanism of the automated rapid calibration device for the brake force sensor of the electromechanical brake system according to a preferred embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of a partial structure of the pressure measuring mechanism of the automatic rapid calibration device for the brake force sensor of the electromechanical braking system according to a preferred embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the mounting hole structure of the automatic rapid calibration device for the brake force sensor of the electromechanical brake system according to a preferred embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the limit plate of the automatic rapid calibration device for the brake force sensor of the electromechanical braking system according to a preferred embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the floating support mechanism of the automatic rapid calibration device for the braking force sensor of the electromechanical braking system according to a preferred embodiment of this utility model.

[0029] Explanation of reference numerals in the accompanying drawings: 1. Conveying mechanism; 11. Support; 12. Track plate; 121. Through groove; 13. Rotary drive source; 14. Moving plate; 15. Ball screw; 16. Bearing seat; 17. Screw nut; 18. Limiting plate; 2. Temperature chamber; 21. Doorway; 22. Observation window; 23. Automatic door; 3. Pressure measuring mechanism; 31. Telescopic drive source; 311. Mounting hole; 32. Floating connecting rod; 33. Pressure sensor; 34. Pressure head; 4. Floating support mechanism; 41. Base; 42. Roller; 43. Roller. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] Reference Figures 1-8 As shown, this utility model discloses an automated and rapid calibration device for the braking force sensor of an electromechanical braking system, comprising:

[0032] The conveying mechanism 1 includes a support 11, a track plate 12, a rotary drive source 13, a moving plate 14, and a ball screw 15. The track plate 12 is horizontally arranged by multiple supports 11. A through groove 121 extending along its length is opened on the top of the track plate 12. A bearing seat 16 is installed at each end of the through groove 121. The ball screw 15 is coaxially arranged in the through groove 121 and its two ends are rotatably connected to the two bearing seats 16 respectively. The moving plate 14 is slidably arranged on the top of the track plate 12 along its length. The moving plate 14 spans the through groove 121 and is connected to the ball screw 15 through a screw nut 17. The rotary drive source 13 is used to drive the ball screw 15 to rotate.

[0033] The temperature chamber 2 is provided in multiple locations and is spaced apart along the length of the track plate 12. Each temperature chamber 2 has two door openings 21 on its side for the track plate 12 to pass through, and each temperature chamber 2 has an observation window 22 on its side.

[0034] The pressure measuring mechanism 3 is provided in multiple sets. Each set of pressure measuring mechanisms 3 includes a telescopic drive source 31, a floating connecting rod 32, a pressure sensor 33, and a pressure head 34. Each telescopic drive source 31 is vertically installed on the top of a temperature chamber 2. The output end of the telescopic drive source 31 extends into the temperature chamber 2 and corresponds to the position of the through slot 121. Each output end of the telescopic drive source 31 has a mounting hole 311 coaxially opened. A floating connecting rod 32 is slidably installed in the mounting hole 311. One end of the floating connecting rod 32 extends out of the mounting hole 311 and is coaxially connected to the detection end of the pressure sensor 33. The other end of the pressure sensor 33 is coaxially connected to the pressure head 34.

[0035] Specifically, three temperature chambers 2 are provided, each offering a testing environment at high temperature, room temperature, and low temperature. When the rotary drive source 13 drives the ball screw 15 to rotate, the screw nut 17, threadedly connected to the ball screw 15, drives the moving plate 14 to slide along the top of the track plate 12, thereby moving the brake force sensor placed on top of the moving plate 14 towards the rear temperature chamber 2. When the moving plate 14 moves to the front of the first temperature chamber 2, the automatic door 23 at the front of this temperature chamber 2 automatically opens, allowing the moving plate 14 to bring the sensor under test into the temperature chamber 2, and aligning the detection end of the sensor under test with the pressure head 34 of the pressure measuring mechanism 3 above. After the automatic door 23 closes, the output shaft of the telescopic drive source 31 extends, causing the pressure head 34 at its front end to press against the detection end of the brake force sensor with a predetermined pressure. At this time, the readings of the brake force sensor and the pressure sensor 33 are checked by a visual inspection device or manually. If the readings correspond, the brake force sensor is qualified; if the readings do not correspond, the brake force sensor is unqualified and needs to be calibrated or repaired. After completing the operation in one temperature chamber 2, the automatic door 23 at the rear of this temperature chamber 2 opens, and the rotary drive source 13 operates to transmit the braking force sensor to the next temperature chamber 2 for the above calibration operation, until the calibration work in the last temperature chamber 2 is completed.

[0036] Specifically, in its natural state, the floating link 32 extends out of the mounting hole 311 under its own weight and the action of its connecting parts. At this time, the pressure sensor 33 connected to the free end of the floating link 32 is not subjected to the pressure applied by the floating link 32, and its reading is zero. When the pressure measuring mechanism 3 detects the brake force sensor, the output shaft of the telescopic drive source 31 extends, causing the pressure head 34 to press against the brake force sensor. At this time, the floating link 32 gradually retracts into the mounting hole 311 and finally abuts against the bottom surface of the mounting hole 311, thus transmitting the pressure applied by the telescopic drive source 31 to the pressure sensor 33 and the pressure head 34. When the output shaft of the telescopic drive source 31 retracts, the floating link 32 gradually extends out of the mounting hole 311 again, causing the pressure sensor 33 to automatically zero.

[0037] This invention relates to an automated and rapid calibration device for brake force sensors in an electromechanical braking system. Multiple temperature chambers 2 are provided to offer different testing environments. A rotary drive source 13, in conjunction with a ball screw 15 and screw nut 17, drives a moving plate 14 to move linearly along a track 12. This sequentially transports the brake force sensor to be tested from the top of the moving plate 14 to each temperature chamber 2 for detection by a pressure measuring mechanism 3. The pressure measuring mechanism 3, with its telescopic drive source 31, floating linkage 32, pressure sensor 33, and pressure head 34, works together to detect the sensor and automatically zero the reading. This eliminates the time spent waiting for temperature changes in the temperature chambers, resulting in a high degree of automation and significantly improved calibration efficiency. Furthermore, the controller can be set so that the pressure sensor 33 at the previous detection position is zeroed after the sensor is transferred from one temperature chamber to the next.

[0038] Reference Figure 2 and Figure 8As shown, it further includes a floating support mechanism 4, which is provided in multiple sets. Each set of floating support mechanisms 4 includes a base 41 and rollers 42. The bottom of the through groove 121 has multiple grooves arranged at intervals along its length. Each base 41 is floatingly disposed in its respective groove. Two rollers 42 parallel to the ball screw 15 are rotatably disposed on the base. The two rollers 42 are arranged on both sides of the ball screw 15 and roll in contact with it. Two sets of rollers 43 are symmetrically arranged on both sides of the base 41. Specifically, since the ball screw 15 is relatively long, in order to ensure the stability of the ball screw 15 during rotation, multiple floating support mechanisms 4 are arranged at intervals along its length to support it. Specifically, the base 41 of the floating support mechanism 4 is fitted into the groove, and multiple elastic elements are symmetrically arranged between the bottom of the base 41 and the bottom surface of the groove, so that the base 41 can float up and down when subjected to force; the two rollers 42 arranged on the top of the base 41 support the ball screw 15, and rotate with it during the rotation of the ball screw 15, further improving the stability of the ball screw 15. It is also conceivable that while the base 41 and its rollers 42 provide support, they could also interfere with the lead screw nut 17. Therefore, rollers 43 are provided on both sides of the base, and the inclined surfaces at both ends of the limiting plate 18 corresponding to the positions of the rollers 43 on the bottom of the base 41 are designed so that when the limiting plate 18 contacts the circumferential surface of the rollers 43, the inclined surfaces apply a downward force to the rollers 43 and the base 41, causing the floating support mechanism 4 to sink as a whole, thus avoiding interference with the lead screw nut 17. After the lead screw nut 17 passes, the floating support mechanism 4 resets and continues to provide support to the ball screw 15. Specifically, the rollers 43 are cylindrical and vertically connected to the side of the base 41.

[0039] Reference Figure 7 As shown, further, two vertical limiting plates 18 are spaced apart at the bottom of the movable plate 14. Both limiting plates 18 are trapezoidal plates, and their lower bottoms are connected to the bottom of the movable plate 14. At the same time, the two limiting plates 18 are respectively in close contact with the two side walls of the through groove 121 and correspond to the positions of the two sets of rollers 43. More preferably, a lubricating oil nozzle located on one side of the roller can be provided on the base.

[0040] Reference Figure 6 As shown, the mounting hole 311 is further defined as a T-shaped hole, and the floating link 32 is a T-shaped column structure that matches the shape of the mounting hole 311. Specifically, the floating link 32 is limited by the stepped surface of the T-shaped hole (i.e., the mounting hole 311) to prevent it from coming out of the mounting hole 311. It should be noted that when setting the T-shaped hole, a certain amount of sliding space should be left for the floating link 32.

[0041] Reference Figure 3As shown, each temperature chamber 2 is further provided with two automatic doors 23 for closing the two door openings 21 respectively. Specifically, a door panel corresponding to the position of the door opening 21 is slidably provided on each of the two sides of the temperature chamber 2 where the door opening 21 is located, and a telescopic cylinder is vertically provided on this side. The telescopic cylinder drives the door panel to slide to close the door opening 21 or open the door opening 21.

[0042] Furthermore, to prevent frost formation in the chamber, a modular sealing method must be adopted, with the inner liner made of stainless steel; the space between the outer shell and the inner liner is filled with rigid polyurethane foam and fiberglass insulation material; a refrigeration compressor and evaporator are used as the power source; a forced circulation system is provided to ensure a uniform and stable temperature field; the refrigeration system is controlled by static balance technology, i.e., a static balance method of "no heating during cooling" and "no cooling during heating"; and a "frost-free" precision molecular sieve filtration system is provided to ensure that the tested product does not frost in the low-temperature cooling chamber.

[0043] Furthermore, the range of pressure sensor 33 is greater than the maximum calibrated pressure value of the brake force sensor.

[0044] Furthermore, it includes a controller, which is connected to the rotary drive source 13, the telescopic drive source 31, and the automatic door 23.

[0045] Furthermore, the top of the movable plate 14 is provided with a receiving groove for fixing the braking force sensor.

[0046] Furthermore, the telescopic drive source 31 adopts an electric telescopic cylinder.

[0047] Furthermore, the rotary drive source 13 employs a servo motor.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An automated and rapid calibration device for the braking force sensor of an electromechanical braking system, characterized in that: include, A conveying mechanism includes a support frame, a track plate, a rotary drive source, a movable plate, and a ball screw. The track plate is horizontally arranged by multiple supports. A through groove extending along the length of the track plate is opened on its top. A bearing seat is installed at each end of the through groove. The ball screw is coaxially arranged in the through groove and its two ends are rotatably connected to the two bearing seats respectively. The movable plate is slidably arranged on the top of the track plate along its length. The movable plate spans the through groove and is connected to the ball screw through a screw nut. The rotary drive source is used to drive the ball screw to rotate. The incubator is provided in multiple locations and spaced apart along the length of the track plate. Each incubator has two door openings on its side for the track plate to pass through, and each incubator has an observation window on its side. The pressure measuring mechanism comprises multiple sets, each including a telescopic drive source, a floating link, a pressure sensor, and a pressure head. Each telescopic drive source is vertically mounted on the top of a temperature chamber. The output end of each telescopic drive source extends into the temperature chamber and corresponds to the position of the through slot. Each output end of the telescopic drive source has a mounting hole coaxially formed. A floating link is slidably mounted in the mounting hole. One end of the floating link extends out of the mounting hole and is coaxially connected to the detection end of the pressure sensor. The other end of the pressure sensor is coaxially connected to the pressure head.

2. The electronically controlled mechanical brake system brake force sensor automated rapid calibration device according to claim 1, characterized in that: It also includes a floating support mechanism, which is provided in multiple sets. Each set of floating support mechanisms includes a base and rollers. The bottom of the through groove is provided with multiple grooves arranged at intervals along its length. Each base is floatingly disposed in each of the grooves. Two rollers parallel to the ball screw are rotatably disposed on the base. The two rollers are arranged on both sides of the ball screw and roll in contact with it. Two sets of rollers are symmetrically disposed on both sides of the base.

3. The electronically controlled mechanical brake system brake force sensor automated fast calibration device according to claim 2, characterized in that: The bottom of the movable plate is provided with two vertical limiting plates at intervals. Both limiting plates are trapezoidal plates and their lower bottoms are connected to the bottom of the movable plate. At the same time, the two limiting plates are respectively close to the two side walls of the through groove and correspond to the positions of the two sets of rollers.

4. The electronically controlled mechanical brake system brake force sensor automated rapid calibration device of claim 1, wherein: The mounting hole is a T-shaped hole, and the floating connecting rod is a T-shaped column structure that matches the shape of the mounting hole.

5. The automated rapid calibration device for the braking force sensor of the electromechanical braking system according to claim 1, characterized in that: Each of the aforementioned incubators is equipped with two automatic doors, each used to close one of the aforementioned doorways.

6. The electronically controlled mechanical brake system brake force sensor automated fast calibration device according to claim 5, characterized in that: It includes a controller, which is connected to the rotary drive source, the telescopic drive source, and the automatic door.

7. The electronically controlled mechanical brake system brake force sensor automated fast calibration device of claim 1, wherein: The range of the pressure sensor is greater than the maximum calibrated pressure value of the brake force sensor.

8. The electronically controlled mechanical brake system brake force sensor automated fast calibration device of claim 1, wherein: The top of the movable plate has a receiving slot for fixing the braking force sensor.

9. The electronically controlled mechanical brake system brake force sensor automated fast calibration device of claim 1, wherein: The telescopic drive source is an electric telescopic cylinder.

10. The electronically controlled mechanical brake system brake force sensor automated fast calibration device of claim 1, wherein: The rotation drive source is a servo motor.

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