Portable parking braking performance tester calibration device

Abstract

The utility model provides a portable parking braking performance tester calibration device, which comprises a supporting bracket, a traction assembly, a standard dynamometer and a controller, the rear end of the supporting bracket is connected with a bracket of a parking braking performance tester through a clamping structure, and the traction assembly comprises an extension bracket, a motor mounting shaft, an electric rotary motor and a pull rope. The calibration device is simple in structure and easy to assemble and disassemble, and can be conveniently carried to a site to carry out calibration work. When the calibration device is used for on-site calibration, the supporting bracket is directly mounted on the bracket of the parking braking performance tester, so that the calibration of the whole set of parking braking performance tester is realized, and the performance of the bracket and the force sensor of the parking braking performance tester can be verified; the problem that the safety and the reliability of the parking braking performance tester support cannot be verified in a laboratory calibration mode is solved.

Description

Technical Field

[0001] This utility model relates to the field of equipment metrology and calibration technology, specifically a portable parking brake performance tester calibration device. Background Technology

[0002] According to the national standard GB 7258—2017 "Technical Conditions for Safe Operation of Motor Vehicles", when a motor vehicle undergoes its annual inspection, the vehicle inspection agency needs to test the vehicle's parking brake performance to assess whether the vehicle's braking performance under braking conditions meets the requirements. Due to the common problem of insufficient space for vehicle inspection agencies in cities, and the difficulty in constructing standard ramps, vehicle inspection agencies typically use parking brake performance testers to conduct vehicle parking performance tests.

[0003] During vehicle inspection, the accuracy of the parking brake performance tester's readings is crucial, necessitating metrological calibration. However, because the entire parking brake performance tester's bracket needs to be fixedly installed in an open area of ​​the vehicle inspection agency, it's difficult to move the entire device for testing. Typically, the force sensor must be removed and sent to the metrology agency's laboratory for calibration. This prevents the vehicle inspection agency from conducting its annual vehicle inspections, disrupting its operations. Furthermore, calibrating the force sensor solely in the laboratory only ensures the accuracy and reliability of the force sensor readings; it doesn't verify the safety of the parking brake performance tester's bracket within the vehicle inspection agency. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a portable parking brake performance tester calibration device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a portable parking brake performance tester calibration device, comprising:

[0006] The support bracket is connected at its rear end to the bracket of the parking brake performance tester via a snap-fit ​​structure.

[0007] A traction assembly includes an extension bracket, a motor mounting shaft, an electric rotary motor, and a pull rope. The rear end of the extension bracket is detachably connected to the front end of the support bracket. The motor mounting shaft is fixedly connected to the front end of the extension bracket. The electric rotary motor is mounted on the motor mounting shaft. One end of the pull rope is wound around the output end of the electric rotary motor.

[0008] A standard force gauge, one end of which is connected to the force sensor of the parking brake performance tester, and the other end of which is connected to the pull rope.

[0009] The controller is connected to the standard force gauge and the electric rotary motor via signal connection.

[0010] This utility model calibration device has a relatively simple structure, mainly including a support bracket, a traction component, a standard force gauge, and a controller. It is easy to assemble and disassemble, and can be conveniently carried to the field for calibration work. During on-site calibration, the support bracket can be directly installed on the bracket of the parking brake performance tester, thereby realizing the calibration of the entire parking brake performance tester. It can verify the performance of the bracket and force sensor of the parking brake performance tester, solving the problem that laboratory calibration methods cannot verify the safety and reliability of the parking brake performance tester bracket.

[0011] Furthermore, the support bracket includes a left support bracket and a right support bracket. Both the left and right support brackets include a front extension and a rear vertical portion located at the rear end of the front extension. The snap-fit ​​structure includes a left-right through pin hole opened at the rear of the front extension and a front-back through threaded hole opened at the rear vertical portion. A pin is inserted into the pin hole, and a pressing screw is connected to the threaded hole.

[0012] By adopting the above-mentioned preferred solution, the support bracket can be quickly and stably installed on the bracket of the parking brake performance tester.

[0013] Furthermore, the front extension is provided with a plurality of pin insertion holes spaced apart in the front-to-back direction.

[0014] By adopting the above-mentioned preferred solution, it is convenient to select the appropriate position of the pin insertion hole according to the bracket width of different models of parking brake performance testers, thereby improving the versatility of the support bracket.

[0015] Furthermore, the front ends of the left support bracket and the right support bracket are provided with slots along the front-to-back length direction, the rear end of the extension bracket is inserted into the slots, the front ends of the left support bracket and the right support bracket are provided with first connecting holes that are perpendicular to the slots, the rear end of the extension bracket is provided with a second connecting hole, and a locking bolt is also provided, the locking bolt being connected through the first connecting hole and the second connecting hole.

[0016] The preferred solution described above facilitates quick and easy docking and installation of the traction component and the support bracket.

[0017] Furthermore, the rear end of the extension bracket is provided with a plurality of second connection holes spaced apart along the front-to-back direction.

[0018] The preferred scheme described above allows for easy adjustment of the extension length of the extension bracket relative to the supporting bracket.

[0019] Furthermore, the electric rotary motor is an external rotor motor, the motor mounting shaft passes through the center hole of the inner stator of the electric rotary motor and is fixedly installed with the inner stator, a winding reel is fixedly installed on the outer rotor of the electric rotary motor, and the end of the pull rope is fixed on the winding reel.

[0020] The preferred design described above results in a more compact structure that is easier to carry.

[0021] Furthermore, the standard force gauge has a force measurement range of 0-100KN and an accuracy class of 0.3.

[0022] The above-mentioned preferred scheme meets the calibration accuracy requirements of the parking brake performance tester.

[0023] Furthermore, the controller's control panel is equipped with controls for adjusting the speed and direction of the electric rotary motor.

[0024] The above-mentioned preferred solution facilitates the control of the electric rotary motor. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the parking brake performance tester.

[0027] Figure 2 This is a schematic diagram of the structure of the calibration device of this utility model installed on the bracket of the parking brake performance tester.

[0028] Figure 3 This is a schematic diagram of one embodiment of the calibration device of this utility model.

[0029] Figure 4 This is a structural diagram of one embodiment of the support bracket.

[0030] Figure 5 This is a structural schematic diagram of one embodiment of the traction component.

[0031] The numbers and letters in the diagram represent the names of the corresponding components:

[0032] 10-Support bracket; 11-Left support bracket; 111-Front extension; 1111-Pin insertion hole; 1112-Slot; 1113-First connecting hole; 112-Rear vertical part; 1121-Threaded hole; 113-Pin; 114-Pressure screw; 12-Right support bracket; 20-Traction assembly; 21-Extension bracket; 211-Second connecting hole; 22-Motor mounting shaft; 23-Electric rotary motor; 24-Pull rope; 25-Winding reel; 26-Locking bolt; 31-Standard force sensor; 91-Bracket; 92-Force sensor. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figure 1 As shown, the parking brake performance tester includes a bracket 91 and a force sensor 92. The bracket 91 is fixedly installed in an open area of ​​the motor vehicle inspection agency. A traction drive mechanism (not shown in the figure) is installed on the bracket 91. The telescopic rod of the traction drive mechanism is connected to the rear end of the force sensor 92 and can apply traction force to it. When testing the parking performance of the vehicle, the front end of the force sensor 92 is connected to the vehicle via a traction rope.

[0035] like Figure 2-5 As shown, one embodiment of this utility model is: a portable parking brake performance tester calibration device, comprising:

[0036] The support bracket 10 is connected at its rear end to the bracket 91 of the parking brake performance tester via a snap-fit ​​structure.

[0037] The traction assembly 20 includes an extension bracket 21, a motor mounting shaft 22, an electric rotary motor 23, and a pull rope 24. The rear end of the extension bracket 21 is detachably connected to the front end of the support bracket 10. The motor mounting shaft 22 is fixedly connected to the front end of the extension bracket 21. The electric rotary motor 23 is mounted on the motor mounting shaft 22. One end of the pull rope 24 is wound around the output end of the electric rotary motor 23.

[0038] A standard force gauge, wherein the rear end of the standard force sensor 31 of the standard force gauge is connected to the force sensor 92 of the parking brake performance tester, and the front end of the standard force sensor 31 is connected to the pull rope 24;

[0039] The controller is connected to the standard force gauge and the electric rotary motor 23 via signal connection.

[0040] Before calibration, first install the support bracket to the parking brake performance tester bracket via its rear-end snap-fit ​​structure. Connect the standard force sensor of the standard force gauge to the force sensor of the parking brake performance tester. Then, mate the extension bracket of the traction assembly with the support bracket and connect the pull rope to the standard force sensor. During calibration, rotate the pull rope using an electric rotary motor to simultaneously apply tension to both the standard force sensor of the standard force gauge and the force sensor of the parking brake performance tester, adjusting the tension of the standard force gauge to a specific calibration value. By observing the tension reading of the force sensor of the parking brake performance tester at the same moment and comparing it with the tension reading of the standard force gauge, the tension reading error of the parking brake performance tester can be calculated. Adjust the electric rotary motor again to change the tension calibration point of the standard force gauge, completing the calibration of the indication error of the parking brake performance tester at different tension calibration points. After the equipment calibration is completed, disassemble the calibration device, pack it into the equipment box, and remove it from the site.

[0041] The advantages of adopting the above technical solution are: the structure is relatively simple, mainly including a support bracket, traction assembly, standard force gauge, and controller; it is easy to assemble and disassemble, and can be conveniently carried to the field for calibration. During on-site calibration, the support bracket of this calibration device can be directly installed on the bracket of the parking brake performance tester, thereby achieving calibration of the entire parking brake performance tester. It can verify the performance of the parking brake performance tester's bracket and force sensor, solving the problem that laboratory calibration methods cannot verify the safety and reliability of the parking brake performance tester's bracket.

[0042] like Figure 3 , Figure 4 As shown, in some embodiments of this utility model, the support bracket 10 includes a left support bracket 11 and a right support bracket 12. Both the left support bracket 11 and the right support bracket 12 include a front extension 111 and a rear vertical portion 112 located at the rear end of the front extension. The snap-fit ​​structure includes a left-right through pin hole 1111 opened at the rear of the front extension 111 and a front-rear through threaded hole 1121 opened at the rear vertical portion 112. A pin 113 is inserted into the pin hole 1111, and a pressing screw 114 is connected to the threaded hole 1121. In use, the pin is inserted into the pin hole of the front extension, and the pin abuts against the front side of the parking brake performance tester bracket. The rear vertical portion is located at the rear side of the parking brake performance tester bracket, and the pressing screw is pressed against the rear side of the parking brake performance tester bracket. The beneficial effect of adopting the above technical solution is that it facilitates the quick and stable installation of the support bracket on the parking brake performance tester bracket.

[0043] like Figure 4As shown, in some other embodiments of this utility model, the front extension 111 is provided with a plurality of pin insertion holes 1111 spaced apart in the front-rear direction. The beneficial effect of adopting the above technical solution is that it facilitates the selection of appropriate pin insertion holes according to the bracket width of different models of parking brake performance testers, thereby improving the versatility of the support bracket.

[0044] like Figures 3-5 As shown, in some other embodiments of this utility model, the front ends of the left support bracket 11 and the right support bracket 12 are both provided with slots 112 along the front-to-back length direction. The rear end of the extension bracket 21 is inserted into the slot 112. The front ends of the left support bracket 11 and the right support bracket 12 are both provided with first connecting holes 1113 that are perpendicular to the slots 112. The rear end of the extension bracket 21 is provided with a second connecting hole 211, which is a threaded hole. A locking bolt 26 is also included, which passes through and connects to both the first connecting hole 1113 and the second connecting hole 211. The beneficial effect of adopting the above technical solution is that it facilitates the quick docking and installation of the traction component and the support bracket.

[0045] like Figure 5 As shown, in some other embodiments of this utility model, the rear end of the extension bracket 21 is provided with a plurality of second connecting holes 211 spaced apart in the front-rear direction. The beneficial effect of adopting the above technical solution is that it facilitates the adjustment of the extension length of the extension bracket relative to the support bracket.

[0046] like Figure 5 As shown, in some other embodiments of this utility model, the electric rotary motor 23 is an external rotor motor. The motor mounting shaft 22 passes through the central hole of the inner stator of the electric rotary motor and is fixedly installed with the inner stator. A winding reel 25 is fixedly installed on the outer rotor of the electric rotary motor, and the end of the pull rope 24 is fixed to the winding reel 25. The beneficial effects of adopting the above technical solution are: the structure is more compact and it is convenient to carry.

[0047] In some other embodiments of this invention, the standard force gauge has a force measurement range of 0-100 kN and an accuracy class of 0.3. This meets the calibration accuracy requirements of the parking brake performance tester, ensuring the accuracy of calibration and testing.

[0048] In some other embodiments of this invention, the control panel of the controller is provided with controls for adjusting the speed and direction of the electric rotary motor, facilitating the operation of the electric rotary motor.

[0049] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A portable parking brake performance tester calibration device, characterized in that, include: The support bracket is connected at its rear end to the bracket of the parking brake performance tester via a snap-fit ​​structure. A traction assembly includes an extension bracket, a motor mounting shaft, an electric rotary motor, and a pull rope. The rear end of the extension bracket is detachably connected to the front end of the support bracket. The motor mounting shaft is fixedly connected to the front end of the extension bracket. The electric rotary motor is mounted on the motor mounting shaft. One end of the pull rope is wound around the output end of the electric rotary motor. A standard force gauge, one end of which is connected to the force sensor of the parking brake performance tester, and the other end of which is connected to the pull rope. The controller is connected to the standard force gauge and the electric rotary motor via signal connection.

2. The portable parking brake performance tester calibration device according to claim 1, characterized in that, The support bracket includes a left support bracket and a right support bracket. Both the left and right support brackets include a front extension and a rear vertical portion located at the rear end of the front extension. The snap-fit ​​structure includes a left-right through pin hole opened at the rear of the front extension and a front-back through threaded hole opened at the rear vertical portion. A pin is inserted into the pin hole, and a pressing screw is connected to the threaded hole.

3. The portable parking brake performance tester calibration device according to claim 2, characterized in that, The front extension has multiple pin holes spaced apart along the front-to-back direction.

4. The portable parking brake performance tester calibration device according to claim 2, characterized in that, The front ends of the left and right support brackets are provided with slots along the front-to-back length direction. The rear end of the extension bracket is inserted into the slot. The front ends of the left and right support brackets are provided with first connecting holes that are perpendicular to the slots. The rear end of the extension bracket is provided with a second connecting hole. The extension bracket also includes a locking bolt, which is connected through the first and second connecting holes.

5. The portable parking brake performance tester calibration device according to claim 4, characterized in that, The rear end of the extension bracket has multiple second connection holes spaced apart along the front-to-back direction.

6. The portable parking brake performance tester calibration device according to claim 1, characterized in that, The electric rotary motor is an external rotor motor. The motor mounting shaft passes through the center hole of the inner stator of the electric rotary motor and is fixedly installed with the inner stator. A winding reel is fixedly installed on the outer rotor of the electric rotary motor, and the end of the pull rope is fixed on the winding reel.

7. The portable parking brake performance tester calibration device according to claim 1, characterized in that, The standard force gauge has a force measurement range of 0-100KN and an accuracy class of 0.

3.

8. The portable parking brake performance tester calibration device according to claim 1, characterized in that, The controller's control panel is equipped with controls for adjusting the speed and direction of the electric rotary motor.

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