A test apparatus

Abstract

The utility model discloses a test equipment, include: monitoring part for receiving the pressure value of force sensor output, pressurizing device for output first pressure, lever mechanism, lever mechanism includes fulcrum, first end and second end, and the fulcrum is located between first end and second end, and pressurizing device is connected with first end, is used for driving first end switches between first position and second position, at first position, force sensor is not under stress, at second position, second end is used for applying second pressure to force sensor, and the distance of first end to fulcrum is greater than the distance of second end to fulcrum. The utility model can be with lower cost, and the durability test of force sensor is realized efficiently.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, and in particular to a testing device. Background Technology

[0002] With the rapid development of vehicle electrification and intelligence, EMB (Electronic Mechanical Brake) systems are also developing rapidly. As a key component of the EMB system, the performance and reliability of electromechanical calipers are of paramount importance.

[0003] Furthermore, the force sensor, as a core component for the precise control of braking force in electromechanical calipers, can monitor the caliper clamping force in real time and convert the physical force signal into an electrical signal to feed back to the electronic control unit, forming a high-precision braking control closed loop.

[0004] However, the driving environment of automobiles is complex and diverse. Force sensors must withstand various harsh conditions such as high temperature, low temperature, humidity, and vibration. In order to ensure that electromechanical calipers can work stably and accurately throughout the entire service life of the automobile, it is necessary to conduct durability tests on force sensors to meet the automotive industry's requirements for high safety and high reliability braking performance. Utility Model Content

[0005] The purpose of this invention is to solve the problem of how to perform durability testing on force sensors at a lower cost. This invention provides a testing device that can efficiently perform durability testing on force sensors at a lower cost.

[0006] To address the aforementioned technical problems, this utility model discloses a testing device, comprising:

[0007] The monitoring unit is used to receive the pressure values ​​output by the force sensor;

[0008] A pressurizing device is used to output the initial pressure;

[0009] A lever mechanism includes a fulcrum, a first end, and a second end. The fulcrum is located between the first end and the second end. A pressurizing device is connected to the first end and is used to drive the first end to switch between a first position and a second position. In the first position, the force sensor is not subjected to force. In the second position, the second end is used to apply a second pressure to the force sensor. The distance from the first end to the fulcrum is greater than the distance from the second end to the fulcrum.

[0010] Using the above technical solution, the pressurizing device outputs a preset first pressure. This first pressure drives the first end of the lever mechanism to switch from a first position to a second position, enabling the second end to apply a second pressure to the force sensor. The force sensor then outputs the pressure value applied by the second end to the monitoring unit. This pressure value can be compared with the second pressure value described below. Based on the lever principle, since the distance from the first end to the fulcrum is greater than the distance from the second end to the fulcrum, the second pressure is a proportionally amplified first pressure. The second pressure value can be obtained before the test begins based on the lever principle. Furthermore, in actual operation, a tested and functional force sensor can be placed at the second end first, allowing it to output a second pressure value to the monitoring unit. Then, the force sensor to be tested can be placed at the second end for testing.

[0011] Therefore, simply compare the pressure value output by the force sensor to the monitoring unit with the second pressure value. If the pressure value output by the force sensor to the monitoring unit is the same as the second pressure value or within the preset error range, it proves that the force sensor is working well. If the pressure value output by the force sensor to the monitoring unit is different from the second pressure value and exceeds the preset error range, it proves that the force sensor may be damaged. In this way, the force sensor can be repeatedly subjected to high-pressure durability testing to meet the automotive industry's requirements for high safety and high-reliability braking performance. The above technical solution does not require complex and costly mechanisms such as gearboxes, and can achieve efficient durability testing of force sensors at a lower cost.

[0012] According to another specific embodiment of the present invention, a testing device is disclosed, wherein the lever mechanism includes a connecting part and a rotating shaft. Along a first direction, the first end and the second end are disposed at both ends of the connecting part, and the rotating shaft extends along a second direction and passes through the connecting part. The connecting part is capable of rotating around the rotating shaft.

[0013] Along the first direction, when the first end moves upward to the second position, the second end moves downward; when the first end moves downward to the first position, the second end moves upward.

[0014] Using the above technical solution, the connecting part can rotate around the pivot, thereby utilizing the lever principle to achieve, at a lower cost, that when the first end moves upward to the second position, the second end moves downward, and when the first end moves downward to the first position, the second end moves upward.

[0015] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device, wherein the lever mechanism includes a first driving part, one end of the first driving part is connected to the first end, and the other end is connected to the pressurizing device. When the pressurizing device outputs the first pressure to the first driving part, the first driving part drives the first end to switch from the first position to the second position.

[0016] According to another specific embodiment of the present invention, a testing device is disclosed. The lever mechanism includes a base, a first support part and a second support part. The first support part and the second support part are both disposed on the base. The first support part is used to support the first driving part and the force sensor, and the second support part is used to support the connecting part.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device, wherein the first support part includes a first support plate and a second support plate, the first support plate and the second support plate are spaced apart on the base along the first direction, the first support plate and the second support part are connected, and the second support plate is connected to the force sensor;

[0018] The second support portion includes a third support plate and a fourth support plate. Along the second direction, the third support plate and the fourth support plate are spaced apart above the first support plate. The force sensor is disposed between the third support plate and the fourth support plate. The rotating shaft passes through the third support plate and the fourth support plate in sequence.

[0019] By adopting the above technical solution, a stable and low-cost frame is built by using the first support plate, the second support plate, the third support plate and the fourth support plate, which can stably set the first drive unit at the first end and stably set the force sensor at the second end, so as to avoid the displacement of the first drive unit or the force sensor during the test and affect the test results.

[0020] According to another specific embodiment of the present invention, a testing device is disclosed. The pressurizing device includes a power source and a second driving unit. One end of the second driving unit is connected to the power source, and the other end is connected to the first driving unit, for outputting the first pressure to the first driving unit.

[0021] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device, wherein the power source includes an electric motor, and the first driving unit and the second driving unit are both hydraulic cylinders.

[0022] Using the above technical solution, the power source includes an electric motor, and both the first drive unit and the second drive unit are hydraulic cylinders, which are low in cost and have controllable pressure.

[0023] According to another specific embodiment of the present invention, a testing device is disclosed. The pressurizing device includes a power transmission section, one end of which is connected to the power source and the other end is connected to the second drive section, for converting the torque output by the power source into a horizontal thrust that acts on the second drive section.

[0024] According to another specific embodiment of the present invention, a testing device is disclosed, wherein the power transmission part includes a slide rail and a ball sliding part, the pressurizing device includes a transmission part, the ball sliding part is disposed on the slide rail, and one end of the ball sliding part is connected to the power source through the transmission part.

[0025] Using the above technical solution, one end of the power transmission unit is connected to the motor, and the other end is connected to the second drive unit. This can convert the torque output by the motor into a horizontal thrust that acts on the second drive unit, allowing the second drive unit to transmit the fluid from the hydraulic cylinder to the first drive unit. This enables the first drive unit to drive the first end to switch positions. By using components such as the hydraulic cylinder, motor, and slide rail in combination, the maintenance cost of the testing equipment can be reduced. For example, there is no need to set up a lubrication system to lubricate the gears.

[0026] According to another specific embodiment of the present invention, a testing device is disclosed, including a control unit connected to the monitoring unit and the pressurizing device.

[0027] With the above technical solution, the control unit is connected to the monitoring unit and the pressurizing device. Therefore, the control unit can monitor the force signal output by the force sensor and feed it back to the pressurizing device in real time to form a closed-loop control, thereby achieving precise control of the durability pressure and number of cycles. Attached Figure Description

[0028] Figure 1 A side view of the test equipment provided in an embodiment of this application is shown.

[0029] Figure 2 A three-dimensional schematic diagram of the test equipment provided in an embodiment of this application is shown.

[0030] Figure 3 A schematic diagram of the communication connection of the test equipment provided in an embodiment of this application is shown.

[0031] Figure 4 A schematic diagram of the force distribution on the lever mechanism of the test device provided in this application embodiment is shown.

[0032] Figure 5 A perspective view of the lever mechanism of the test device provided in an embodiment of this application is shown.

[0033] Figure 6 A perspective sectional view of the lever mechanism of the test device provided in an embodiment of this application is shown.

[0034] Figure 7 A perspective view of the pressurization device of the test equipment provided in the embodiments of this application is shown.

[0035] Figure 8 A schematic diagram of the internal structure of the pressurization device of the test equipment provided in this application embodiment is shown.

[0036] Figure 9 A perspective view of the power source, second drive unit, and power transmission unit of the pressurization device of the test equipment provided in the embodiments of this application is shown.

[0037] Figure 10 A perspective cross-sectional view of the second drive unit of the pressurization device of the test equipment provided in this application embodiment is shown. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0039] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0041] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] In some embodiments, see Figure 1 , Figure 2 , Figure 3 This application provides a testing device, which includes a monitoring unit, a pressurizing device 10, and a lever mechanism 20. Exemplarily, the monitoring unit receives the pressure value output by the force sensor 30, and the pressurizing device 10 outputs a first pressure.

[0045] The lever mechanism 20 includes a fulcrum, a first end 21, and a second end 22. The fulcrum is located between the first end 21 and the second end 22. The pressurizing device 10 is connected to the first end 21 and is used to drive the first end 21 to switch between a first position and a second position. In the first position, the force sensor 30 is not under force. In the second position, the second end 22 is used to apply a second pressure to the force sensor 30. The distance from the first end 21 to the fulcrum is greater than the distance from the second end 22 to the fulcrum, and the second pressure is greater than the first pressure.

[0046] Using the above technical solution, the pressurizing device 10 outputs a preset first pressure. This first pressure drives the first end 21 of the lever mechanism 20 to switch from a first position to a second position. The second end 22 applies a second pressure to the force sensor 30, and the force sensor 30 outputs the pressure value applied by the second end 22 to the monitoring unit. This pressure value can be compared with the second pressure value described below. Based on the lever principle, since the distance from the first end 21 to the fulcrum is greater than the distance from the second end 22 to the fulcrum, the second pressure is a proportionally amplified first pressure. The second pressure value can be obtained before the test begins based on the lever principle. Furthermore, in actual operation, a tested force sensor 30 can be placed on the second end 22 first. A tested and functional force sensor 30 can output a second pressure value to the monitoring unit, and then the force sensor 30 to be tested can be placed on the second end 22 for testing.

[0047] Regardless of the method used to obtain the standard second pressure value, simply compare the pressure value output by the force sensor 30 to the monitoring unit with the second pressure value. If the pressure value output by the force sensor 30 to the monitoring unit is the same as the second pressure value or within the preset error range, it proves that the force sensor 30 is working well. If the pressure value output by the force sensor 30 to the monitoring unit differs from the second pressure value and exceeds the preset error range, it proves that the force sensor 30 may be damaged. Thus, the force sensor 30 can be repeatedly subjected to high-pressure durability testing to meet the automotive industry's requirements for high safety and high-reliability braking performance. The above technical solution eliminates the need for complex and costly mechanisms such as gearboxes, enabling efficient and cost-effective durability testing of the force sensor 30.

[0048] In some embodiments, see Figure 1 , Figure 2 , Figure 3 The testing equipment includes a control unit connected to a monitoring unit and a pressurizing device 10. Exemplarily, the monitoring unit includes a display screen capable of displaying the received second signal value. Exemplarily, the control unit and the monitoring unit are integrated into a host computer 40, which can be a computer or other terminal device; this embodiment does not limit this. In this embodiment, the control unit can monitor the force signal output by the force sensor and provide real-time feedback to the pressurizing device to form a closed-loop control, achieving precise control of the durability pressure and number of cycles (e.g., 300,000 cycles).

[0049] In some embodiments, see Figure 4 , Figure 5 and combined Figure 2The lever mechanism 20 includes a connecting portion 23 and a rotating shaft 24. The rotating shaft 24 is located at the aforementioned fulcrum position. Along the first direction Z, a first end 21 and a second end 22 are located at both ends of the connecting portion 23. The rotating shaft 24 extends along the second direction X and passes through the connecting portion 23, allowing the connecting portion 23 to rotate around the rotating shaft 24. Along the first direction Z, when the first end 21 moves upward to the second position, the second end 22 moves downward; when the first end 21 moves downward to the first position, the second end 22 moves upward. Exemplarily, the connecting portion 23 has at least one connecting hole 231, through which the rotating shaft 24 passes.

[0050] In some embodiments, see Figure 4 , Figure 5 and combined Figure 2 The connecting portion 23 includes a first lever arm L1 and a second lever arm L2. The first lever arm L1 represents the distance from the first end 21 to the fulcrum, and the second lever arm L2 represents the distance from the second end 22 to the fulcrum. The first pressure is amplified according to a first ratio to obtain the second pressure, and the first ratio includes the ratio of the first lever arm L1 to the second lever arm L2. Exemplarily, both the first end 21 and the second end 22 extend along a first direction Z, and the connecting portion 23 is a plate-like structure extending along a third direction Y. It can be understood that the embodiments of this application are not limited in this respect, and for example, it can also be a rod-like structure.

[0051] With the position of the pivot 24 as the boundary, the connecting part 23 is divided into a first part 232 and a second part 233 in the third direction Y. The length of the first part 232 is the first lever arm L1, and the length of the second part 233 is the second lever arm L2. When the first end 21 is subjected to the first pressure F1 and moves upward along the first direction Z, the second end 22 moves downward and outputs the second pressure F2. At this time, according to the lever principle F1×L1=F2×L2, it can be known that F2=F1×L1 / L2, and L1 / L2 represents the value of the first ratio.

[0052] The value of the first ratio can be determined according to actual needs. For example, when the first lever arm L1 is 80cm and the second lever arm L2 is 10cm, the first pressure can be determined to be magnified by 8 times. When the preset first pressure value is 8.125KN, the second pressure value output by the second end 22 can reach 65KN, realizing the high-pressure durability and calibration test of the force sensor 30. This application embodiment does not limit the preset error range. The following description uses an error range of ±1KN as an example.

[0053] If the pressure value output by the force sensor 30 to the monitoring unit is the same as the second pressure value or is within the preset error range, for example, if the pressure value output by the force sensor 30 to the monitoring unit is any one of 64KN, 64.5KN, 65KN, 65.2KN, or 66KN, then it proves that the force sensor 30 is working well.

[0054] If the pressure value output by the force sensor 30 to the monitoring unit is different from the second pressure value and exceeds the preset error range, for example, if the pressure value output by the force sensor 30 to the monitoring unit is any one of 63.9KN, 60KN, 66.2KN, or 70KN, then it proves that the force sensor 30 may be damaged.

[0055] Understandably, the embodiments of this application do not limit the length of the first lever arm L1 and the second lever arm L2, nor do they limit the first pressure value; the specific value can be determined according to actual needs.

[0056] For example, when the connecting part 23 is provided with multiple connecting holes 231, the multiple connecting holes 231 are spaced apart along the third direction Y of the connecting part 23. The operator can place the connecting shaft in different connecting holes 231 as needed, thereby obtaining different first ratio values. The amplification factor of the first pressure value can be adjusted without changing the equipment, further reducing costs and improving testing efficiency. The embodiments of this application do not limit the number of connecting holes 231, for example, it can be 2, 3, 4, etc.

[0057] In some embodiments, see Figure 4 , Figure 5 , Figure 6 and combined Figure 2 The lever mechanism 20 includes a first drive unit 25. One end of the first drive unit 25 is connected to a first end 21, and the other end is connected to a pressurizing device 10. When the pressurizing device 10 outputs a first pressure to the first drive unit 25, the first drive unit 25 drives the first end 21 to switch from a first position to a second position. For example, the first drive unit 25 includes a first hydraulic cylinder 251. The first hydraulic cylinder 251 is provided with a first piston 252. Along the first direction Z, one end of the first piston 252 is connected to the first end 21, and the other end extends into the first hydraulic cylinder 251. When hydraulic oil is continuously injected into the first hydraulic cylinder 251, the hydraulic oil can push the first piston 252 to move upward along the first direction Z, so that the first end 21 switches from the first position to the second position. When the hydraulic oil in the first hydraulic cylinder 251 is extracted, under the action of the gravity of the first end 21 and the first piston 252, both the first piston 252 and the first end 21 move downward, and the first end 21 switches from the second position to the first position.

[0058] In some embodiments, see Figure 4 , Figure 5 , Figure 6 and combined Figure 2The lever mechanism 20 includes a base 26, a first support portion 27, and a second support portion 28. Both the first support portion 27 and the second support portion 28 are disposed on the base 26. The first support portion 27 supports the first drive portion 25 and the force sensor 30, and the second support portion 28 supports the connecting portion 23. Exemplarily, the base 26 is formed by two support columns extending in a third direction Y. In a second direction X, the two support columns are spaced apart. It is understood that the structure of the base 26 is not limited in this embodiment; for example, it can also be plate-shaped.

[0059] In some embodiments, see Figure 4 , Figure 5 , Figure 6 and combined Figure 2 The first support portion 27 includes a first support plate 271 and a second support plate 272. Along the first direction Z, the first support plate 271 and the second support plate 272 are spaced apart from the base 26. The first support plate 271 and the second support portion 28 are connected, and the second support plate 272 is connected to the force sensor 30. Exemplarily, the lever mechanism 20 also includes a handle 29, which is located on the side of the first support plate 271 and the second support plate 272, facilitating the user to move the lever mechanism 20. Exemplarily, both the first support plate 271 and the second support plate 272 are detachably connected to the base 26 via connectors. This embodiment does not limit the type of connector; for example, it could be a screw.

[0060] For example, the first support plate 271 includes a first mounting hole 2711, and a first hydraulic cylinder 251 is disposed in the first mounting hole 2711. The first hydraulic cylinder 251 is detachably connected to the first support plate 271 through the aforementioned connector. The second support plate 272 includes a second mounting hole 2721. Along the first direction Z, one end of the force sensor 30 abuts against the second end 22, and the other end passes through the second mounting hole 2721, so that the force sensor 30 is more stably disposed on the second support plate 272. For example, the second support plate 272 includes a first weight-reducing through hole 2722. Along the second direction X, the first weight-reducing through hole 2722 is disposed between the two support columns to reduce the weight of the lever mechanism 20 and meet the requirements of lightweight design.

[0061] In some embodiments, see Figure 4 , Figure 5 , Figure 6 and combined Figure 2The second support portion 28 includes a third support plate 281 and a fourth support plate 282. Along the second direction X, the third support plate 281 and the fourth support plate 282 are spaced apart above the first support plate 271. A force sensor 30 is disposed between the third support plate 281 and the fourth support plate 282. A rotating shaft 24 passes through the third support plate 281 and the fourth support plate 282 sequentially. Exemplarily, both the third support plate 281 and the fourth support plate 282 are trapezoidal in shape. The bottom of both the third support plate 281 and the fourth support plate 282 is located on the first support plate 271, and the tops of the third support plate 281 and the fourth support plate 282 are connected by a connecting plate 283, further improving the connection stability of the third support plate 281 and the fourth support plate 282. This application embodiment does not limit the shape of the third support plate 281 and the fourth support plate 282; for example, they can be rectangular.

[0062] For example, along the second direction X, the pivot 24 passes through the third support plate 281, the connecting part 23 and the fourth support plate 282 in sequence. The third support plate 281 and the fourth support plate 282 are respectively provided with second weight-reducing through holes 284 to further reduce the weight of the lever mechanism 20 and meet the requirements of lightweight design.

[0063] In some embodiments, see Figure 7 , Figure 8 , Figure 9 and combined Figure 2 The pressurizing device 10 includes a power source 11 and a second drive unit 12. One end of the second drive unit 12 is connected to the power source 11, and the other end is connected to a first drive unit 25, for outputting a first pressure to the first drive unit 25. Exemplarily, the pressurizing device 10 is a pulse pressurizing device 10, which, under the control of a control unit, can output a first pressure according to a preset pressure magnitude and number of pressurization cycles at preset time intervals. Exemplarily, the pressurizing device 10 includes a housing 101, with the power source 11 disposed inside the housing 101, and the second drive unit 12 passing through the side of the housing 101. Exemplarily, the pressurizing device 10 includes casters 15, with four casters 15 spaced apart at the bottom of the housing 101.

[0064] In some embodiments, see Figure 7 , Figure 8 , Figure 9 and combined Figure 2The power source 11 includes a motor 111, and the second drive unit 12 includes a second hydraulic cylinder 121, which is connected to the first hydraulic cylinder 251. Exemplarily, the second drive unit 12 includes a second piston 122, which passes through the side of the housing 101. An oil supply unit 123 is provided on the outer side of the second hydraulic cylinder 121, and the oil supply unit 123 is connected to the second hydraulic cylinder 121. Along the third direction Y, when the second piston 122 moves toward the second hydraulic cylinder 121, the second piston 122 pushes hydraulic oil into the first hydraulic cylinder 251, driving the first piston 252 to move upwards along the first direction Z, so that the first end 21 switches from a first position to a second position. Exemplarily, the second hydraulic cylinder 121 provided in this application embodiment can output a maximum hydraulic pressure of 230 bar, but this application embodiment does not limit this.

[0065] In some embodiments, see Figure 8 , Figure 9 , Figure 10 and combined Figure 2 The second hydraulic cylinder 121 is equipped with a return spring 1211 and a hydraulic oil output section 1212. One end of the hydraulic oil output section 1212 is connected to the second hydraulic cylinder 121, and the other end is connected to the first hydraulic cylinder 251. The return spring 1211 abuts against the second piston 122 and the hydraulic oil output section 1212. When the second piston 122 moves toward the second hydraulic cylinder 121, the return spring 1211 is compressed. When the second piston 122 stops moving toward the hydraulic oil output section 1212, the return spring 1211 returns to its uncompressed state, driving the second piston 122 to move away from the hydraulic oil output section 1212 along a third direction Y. Exemplarily, the first hydraulic cylinder 251 and the second hydraulic cylinder 121 can be connected through an oil pipe. It can be understood that the second piston 122 provided in the embodiments of this application can be formed by splicing multiple segments (e.g., Figure 10 (As shown), it can also be an integrated design, and this application embodiment does not limit this.

[0066] In some embodiments, see Figure 8 , Figure 9 , Figure 10 and combined Figure 2 The pressurizing device 10 includes a power transmission section 13, one end of which is connected to a power source 11, and the other end is connected to a second drive section 12, for converting the torque output by the power source 11 into a horizontal thrust that acts on the second drive section 12. Exemplarily, the power transmission section 13 includes a slide rail 131 and a ball bearing sliding section 132, and the pressurizing device 10 includes a transmission section 14. The ball bearing sliding section 132 is disposed on the slide rail 131, and one end of the ball bearing sliding section 132 is connected to the power source 11 via the transmission section 14.

[0067] For example, see Figure 8 , Figure 9, Figure 10 and combined Figure 2 The power transmission unit 13 includes a drive shaft 133 along a third direction Y. The drive shaft 133 and the transmission unit 14 are located on both sides of the ball sliding part 132 along a first direction Z. The slide rail 131 is located below the drive shaft 133. The transmission unit 14 includes a drive belt 141 and a drive wheel 142. The drive wheel 142 is located at one end of the ball sliding part 132 along the first direction Z. The motor 111 is located above the power transmission unit 13. The output shaft of the motor 111 is connected to the drive wheel 142 via the drive belt 141. When the motor 111 rotates, it can drive the drive wheel 142 to rotate together around the third direction Y. Under the action of the ball sliding part 132, the drive shaft 133 can move along the first direction Z to abut against the second piston 122 and push the second piston 122 to move along the third direction Y toward the second hydraulic cylinder 121.

[0068] In some embodiments, the power transmission unit 13 includes a first housing 134, which is disposed on the outside of the drive shaft 133, the slide rail 131 and the ball sliding part 132, providing protection for the drive shaft 133, the slide rail 131 and the ball sliding part 132. The second drive unit 12 of the drive shaft 133 includes a second housing 124, which is disposed on the outside of the second piston 122, providing fixation and protection for the second piston 122.

[0069] To test the fatigue durability characteristics of the force sensor 30, the testing equipment provided in this application embodiment can output the hydraulic pressure from the pulse pressurization device 10 through the oil pipe to the first hydraulic cylinder 251, and output the second pressure through the first hydraulic cylinder 251 to drive the lever mechanism 20 to move. Using the lever ratio principle, the second pressure output by the lever mechanism 20 is proportionally amplified based on the first pressure, so as to realize the high-force durability and calibration test of the force sensor 30.

[0070] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A testing device, characterized in that, include: The monitoring unit is used to receive the pressure values ​​output by the force sensor; A pressurizing device is used to output the initial pressure; A lever mechanism includes a fulcrum, a first end, and a second end. The fulcrum is located between the first end and the second end. A pressurizing device is connected to the first end and is used to drive the first end to switch between a first position and a second position. In the first position, the force sensor is not subjected to force. In the second position, the second end is used to apply a second pressure to the force sensor. The distance from the first end to the fulcrum is greater than the distance from the second end to the fulcrum.

2. The testing equipment as described in claim 1, characterized in that, The lever mechanism includes a connecting part and a rotating shaft. Along a first direction, the first end and the second end are located at both ends of the connecting part. The rotating shaft is located at the fulcrum and extends along a second direction through the connecting part. The connecting part is capable of rotating around the rotating shaft. Along the first direction, when the first end moves upward to the second position, the second end moves downward; when the first end moves downward to the first position, the second end moves upward.

3. The testing equipment as described in claim 2, characterized in that, The lever mechanism includes a first driving part, one end of which is connected to the first end and the other end is connected to the pressurizing device. When the pressurizing device outputs the first pressure to the first driving part, the first driving part drives the first end to switch from the first position to the second position.

4. The testing equipment as described in claim 3, characterized in that, The lever mechanism includes a base, a first support portion and a second support portion. Both the first support portion and the second support portion are disposed on the base. The first support portion is used to support the first drive portion and the force sensor, and the second support portion is used to support the connecting portion.

5. The testing equipment as described in claim 4, characterized in that, The first support portion includes a first support plate and a second support plate. Along the first direction, the first support plate and the second support plate are spaced apart from the base. The first support plate and the second support portion are connected, and the second support plate is connected to the force sensor. The second support portion includes a third support plate and a fourth support plate. Along the second direction, the third support plate and the fourth support plate are spaced apart above the first support plate. The force sensor is disposed between the third support plate and the fourth support plate. The rotating shaft passes through the third support plate and the fourth support plate in sequence.

6. The testing equipment as described in claim 3, characterized in that, The pressurizing device includes a power source and a second drive unit. One end of the second drive unit is connected to the power source, and the other end is connected to the first drive unit, for outputting the first pressure to the first drive unit.

7. The testing equipment as described in claim 6, characterized in that, The power source includes an electric motor, and both the first drive unit and the second drive unit are hydraulic cylinders.

8. The testing equipment as described in claim 6, characterized in that, The pressurization device includes a power transmission section, one end of which is connected to the power source and the other end of which is connected to the second drive section, for converting the torque output by the power source into a horizontal thrust that acts on the second drive section.

9. The testing equipment as described in claim 8, characterized in that, The power transmission unit includes a slide rail and a ball bearing sliding part. The pressurizing device includes a transmission part. The ball bearing sliding part is disposed on the slide rail, and one end of the ball bearing sliding part is connected to the power source through the transmission part.

10. The testing equipment as described in claim 1, characterized in that, It includes a control unit, which is connected to the monitoring unit and the pressurization device.

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