Testing device

Abstract

The invention discloses a testing device, and relates to the technical field of testing devices.The testing device comprises a workbench, a positioning tool, a moving assembly, a distance measuring instrument, a transmission assembly and a hysteresis brake, the positioning tool is installed on the workbench, the moving assembly comprises a sliding frame, a calibration piece and a force sensor, the sliding frame comprises a first support and a second support, and the first support and the second support are arranged on the workbench; the first support is connected with a moving block of a to-be-detected workpiece, the second support is slidably mounted on the workbench, and the calibration piece is mounted on the first support or the second support and can slide along with the first support or the second support; one end of the force sensor is connected to the first support and the other end is connected to the second support; the range finder is used for measuring the sliding distance of the calibration piece; the transmission assembly comprises a gear and a rack which are meshed with each other. The rack is installed on the second support. The hysteresis brake is in transmission connection with the gear and used for providing resistance for preventing the gear from rotating. According to the invention, the displacement adjustment precision of the lens of the intelligent wearable device can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a testing device. Background Art

[0002] In the adjustment process of smart wearable devices such as VR (Virtual Reality), the interpupillary distance is adjusted by a motor-driven moving block along a sliding axis. However, in related technologies, the actual adjustment distance of the lenses of smart wearable devices is significantly different from the ideal adjustment distance, resulting in low adjustment accuracy. Summary of the Invention

[0003] The main purpose of the present invention is to propose a testing device to solve the technical problem of low adjustment accuracy of lenses of smart wearable devices in the related art.

[0004] To achieve the above objectives, according to some embodiments of the present invention, the present invention provides a testing device, comprising: Workbench; A positioning tool, the positioning tool is installed on the workbench and is used to place the workpiece to be measured; A moving assembly, the moving assembly comprising a sliding frame, a calibration piece, and a force sensor, the sliding frame comprising a first bracket and a second bracket, the first bracket being connected to the moving block of the workpiece to be measured, the second bracket being slidably mounted on the workbench, the calibration piece being mounted on the first bracket or the second bracket and being capable of sliding therewith; one end of the force sensor being connected to the first bracket, and the other end being connected to the second bracket; a distance meter, the distance meter being used to measure the sliding distance of the calibration piece; a transmission assembly, the transmission assembly comprising a gear and a rack meshing with each other, the rack being mounted on the second bracket; A hysteresis brake is connected to the gear transmission, and the hysteresis brake is used to provide resistance to prevent the gear from rotating.

[0005] In some embodiments, the testing device also includes a coupling and a first transmission shaft, the gear is sleeved on the first transmission shaft, the hysteresis brake includes a second transmission shaft coaxially arranged with the first transmission shaft, the coupling connects the first transmission shaft and the second transmission shaft, and the central axis direction of the first transmission shaft is arranged perpendicular to the moving direction of the rack.

[0006] In some embodiments, the movable assembly further includes a mounting seat and a threaded member, the mounting seat is provided with a first mounting hole and an elastic pin, the first bracket is provided with a positioning hole and a second mounting hole, the elastic pin passes through the positioning hole from the bottom of the first bracket and extends out of the first bracket, the threaded member is inserted into the first mounting hole and the second mounting hole to connect the mounting seat and the first bracket.

[0007] In some embodiments, a plurality of positioning holes are provided on the first bracket, and the elastic pin can be installed in any of the positioning holes.

[0008] In some embodiments, the second bracket includes a base plate and a vertical plate arranged on the base plate, the base plate is slidably connected to the workbench, the rack is installed on the base plate, and one end of the force sensor is connected to the vertical plate.

[0009] In some embodiments, a first blocking member is provided on the first bracket, a second blocking member is provided on the vertical plate, one end of the force sensor abuts against the first blocking member, and the other end of the force sensor abuts against the second blocking member.

[0010] In some embodiments, the first blocking member includes two first blocking blocks spaced apart, with a first gap provided between the two first blocking blocks; the second blocking member includes two second blocking blocks spaced apart, with a second gap provided between the two second blocking blocks; the testing device further includes a first fastener and a second fastener, the first fastener passes through the first gap and is installed at one end of the force sensor, and the second fastener passes through the second gap and is installed at the other end of the force sensor.

[0011] In some embodiments, a limit plate extending toward the first bracket is further provided on the bottom plate, and a gap is provided between the limit plate and the bottom surface of the first bracket facing the workbench. The limit plate is used to limit the distance that the first bracket moves downward toward the limit plate.

[0012] In some embodiments, the sliding direction of the moving block, the sliding direction of the second bracket, and the moving direction of the rack are all the same.

[0013] In some embodiments, the positioning tool is provided with a positioning groove and a positioning column, the positioning groove is used to accommodate the workpiece to be tested, and the positioning column is used to cooperate with the hole position of the workpiece to be tested. The testing device also includes a clamping tool, and the clamping tool includes a pressure plate and a pressure rod arranged on the pressure plate. The pressure plate is installed on the workbench to insert the pressure rod onto the positioning column.

[0014] In some embodiments, the moving assembly, the transmission assembly and the hysteresis brake are each in two groups and are connected in a one-to-one correspondence. The workpiece to be measured includes two moving blocks, and one moving assembly is connected to one moving block.

[0015] In the above scheme, the testing device includes a workbench, a positioning fixture, a moving assembly, a rangefinder, a transmission assembly, and a hysteresis brake. The positioning fixture is mounted on the workbench and is used to place the workpiece to be tested. The moving assembly includes a sliding frame, a calibration piece, and a force sensor. The sliding frame includes a first bracket and a second bracket. The first bracket is connected to the moving block of the workpiece to be tested, and the second bracket is slidably mounted on the workbench. The calibration piece is mounted on the first bracket or the second bracket and can slide therewith. One end of the force sensor is connected to the first bracket and the other end is connected to the second bracket. The rangefinder is used to measure the sliding distance of the calibration piece. The transmission assembly includes a gear and a rack that mesh with each other, and the rack is mounted on the second bracket. The hysteresis brake is connected to the gear transmission and is used to provide resistance to prevent the gear from rotating. By setting up a hysteresis brake, the invention can provide a constant load force by adjusting the current, simulating the resistance encountered by the moving block of the pupil distance adjustment module during movement, thereby improving the displacement adjustment accuracy of the lens of the smart wearable device. The driving force can also be controlled within a reasonable range through a force sensor, and the actual movement displacement of the moving block can be measured through a calibration piece and a rangefinder, which can be compared with the ideal movement displacement to test the displacement measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a testing device according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a testing device according to an embodiment of the present invention from one perspective; Figure 3 This is a schematic diagram of a portion of the structure of a testing device according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a transmission assembly, a coupling, and a hysteresis brake of a test device according to an embodiment of the present invention; Figure 5 This is another schematic diagram of the structure of a test device according to an embodiment of the present invention; Figure 6This is a schematic structural diagram of a first bracket, a positioning pin, and a mounting base of a testing device according to an embodiment of the present invention; Figure 7 This is a schematic structural diagram of a positioning pin and a mounting base of a testing device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of another part of the structure of the testing device according to an embodiment of the present invention; Figure 9 This is another schematic diagram of the structure of a test device according to an embodiment of the present invention; Figure 10 for Figure 9 Schematic diagram of the decomposition structure.

[0018] Description of Figure Numbers: 100, testing device; 200, workpiece to be tested; 210, moving block; 2. Workbench; 3. Positioning fixture; 31. Positioning column; 4. Sliding frame; 41. First bracket; 411. First stop block; 412. First interval; 42. Second bracket; 421. Base plate; 422. Vertical plate; 4221. Second stop block; 4222. Second interval; 423. Limit plate; 5. First transmission shaft; 6. Force sensor; 7. Distance meter; 8. Coupling; 9. Gear; 10. Rack; 11. Hysteresis brake; 111. Second transmission shaft; 12. Mounting seat; 121. Elastic space; 13. Threaded part; 14. Elastic pin; 141. Spring; 142. Pin body; 15. Gap; 16. Clamping fixture; 161. Pressing plate; 162. Pressing rod; 17. Calibration part; 18. First fastener; 19. Second fastener.

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] In the adjustment process of smart wearable devices such as VR (Virtual Reality), AR (Augmented Reality), and MR (Mixed Reality), pupil distance is adjusted by driving a moving block along a sliding axis via a motor. However, in related technologies, there is a large gap between the actual adjustment distance of the lens and the ideal adjustment distance, resulting in low adjustment accuracy.

[0024] After careful research, the applicant discovered that, for example, in VR, when a motor drives a moving block, the block experiences resistance, such as friction. This resistance causes a discrepancy between the actual displacement of the block and the desired displacement after the motor outputs driving force to the block, reducing adjustment accuracy. While those skilled in the art have sought to reduce this resistance, their success has been limited due to the complexity of generating system resistance and the difficulty of eliminating friction itself.

[0025] The applicant considered that, since system resistance is unavoidable, whether it is possible to acknowledge its existence and design a test device to test the displacement adjustment accuracy of the lens in the presence of resistance.

[0026] To this end, the applicant proposes a testing device.

[0027] See also Figure 1 and Figure 2According to some embodiments of the present invention, the present invention provides a testing device 100, including a workbench 2, a positioning fixture 3, a moving assembly, a rangefinder 7, a transmission assembly and a hysteresis brake 11, the positioning fixture 3 is installed on the workbench 2, and the positioning fixture 3 is used to place the workpiece 200 to be measured; the moving assembly includes a sliding frame 4, a calibration piece 17 and a force sensor 6, the sliding frame 4 includes a first bracket 41 and a second bracket 42, the first bracket 41 is connected to the moving block 210 of the workpiece 200 to be measured, and the second bracket 42 is slidably installed on the workbench 2, the calibration piece 17 is installed on the first bracket 41 or the second bracket 42 and can slide therewith; one end of the force sensor 6 is connected to the first bracket 41, and the other end is connected to the second bracket 42; the rangefinder 7 is used to measure the sliding distance of the calibration piece 17; the transmission assembly includes a gear 9 and a rack 10 that are meshed with each other, and the rack 10 is installed on the second bracket 42; the hysteresis brake 11 is connected to the gear 9 for transmission, and the hysteresis brake 11 is used to provide resistance to prevent the gear 9 from rotating.

[0028] Reference Figure 1 and Figure 2 , the workbench 2 refers to the base on which the various components are placed. The workbench 2 can be placed on the work table, and the positioning tool 3 is used to position and place the workpiece 200 to be measured. If the workpiece 200 to be measured is a pupil distance adjustment module, the pupil distance adjustment module is a part of the smart wearable device, which is used to adjust the position of the lens. The pupil distance adjustment module includes a driving motor and a moving block 210 connected to the driving motor. The moving block 210 is connected to the frame, and the lens is arranged in the frame. Generally speaking, the number of the driving motor and the moving block 210 are both two and they are connected one to one. The moving block 210 can move along the axis. The two moving blocks 210 are respectively connected to the two frames, and are used to adjust the distance between the two lenses, which can also be said to be adjusting the pupil distance.

[0029] Reference Figure 3 The sliding frame 4 includes a first bracket 41 and a second bracket 42 that are connected to each other. The first bracket 41 is connected to the moving block 210 and can move under the drive of the moving block 210. The second bracket 42 is slidably installed on the workbench 2. The two ends of the force sensor 6 are respectively connected to the first bracket 41 and the second bracket 42. The force sensor 6 can measure the driving force of the driving motor on the moving block 210 through the pressure between the first bracket 41 and the second bracket 42 to detect the driving force of the motor. The testing device 100 can determine whether the driving force is within a preset range based on the driving force value.

[0030] The rangefinder 7 can be fixedly mounted on the workbench 2. Specifically, the rangefinder 7 can be a laser displacer, and the measurement accuracy of the laser displacer is higher. The calibration member 17 refers to a component used for measurement by the rangefinder 7. Specifically, the calibration member 17 can be a vertical rod or a vertical plate. Generally speaking, the laser emitted by the laser rangefinder 7 is emitted horizontally, while the calibration member 17 is set vertically. The calibration member 17 can move with the sliding frame 4, and can be set on the first bracket 41 or on the second bracket 42. Because the first bracket 41 and the second bracket 42 move synchronously during the actual movement of the sliding frame 4, and because the sliding block is connected to the first bracket 41 and is used to drive the first bracket 41 to move, the actual movement displacement of the calibration member 17 is also the movement displacement of the moving block 210. In this way, the actual movement displacement of the moving block 210 can be measured by measuring the movement displacement of the calibration member 17.

[0031] Reference Figure 1 or Figure 3 In some embodiments, the number of moving assemblies, transmission assemblies, and hysteresis brakes 11 is two, and they are connected in a one-to-one correspondence. The workpiece 200 to be measured includes two moving blocks 210, and one moving assembly is connected to each moving block 210. Since there are two moving blocks 210, there are also two corresponding moving assemblies, transmission assemblies, and hysteresis brakes 11, which are used to provide a constant load force to the two moving blocks 210 and measure the actual displacement of the moving blocks 210, thereby detecting and adjusting the measurement accuracy.

[0032] Reference Figure 3 The rack 10 is installed on the second bracket 42, specifically on the top of the second bracket 42, and can be connected by screws or welded. The rack 10 and the second bracket 42 move synchronously. The rack 10 can drive the gear 9 to rotate by linear motion. The meshing design of the gear 9 and the rack 10 can realize the conversion between linear torque and rotational torque.

[0033] The hysteresis brake 11 is in transmission connection with the gear 9. The hysteresis brake 11 is used to provide resistance to prevent the gear 9 from rotating. The hysteresis brake 11 can provide a constant resistance, which is used to simulate the resistance encountered by the moving block 210 of the pupil distance adjustment module during movement. In this way, by simulating the environment of the resistance encountered by the moving block 210 through the hysteresis brake 11, the displacement of the moving block 210 during actual use of the pupil distance adjustment module can be measured, so that the displacement of the lens can be obtained. In addition, the resistance provided by the hysteresis brake 11 is constant and will not change due to the movement of the moving block 210, which is conducive to improving the adjustment accuracy.

[0034] The principle of the hysteresis brake 11 is described as follows: For the hysteresis brake 11, the relationship between force and load torque is: T=n*I; Here, I represents the drive current flowing into the hysteresis brake 11, n represents the conversion factor, and T represents the torque. This indicates that the load torque of the hysteresis brake 11 is proportional to the drive current. The hysteresis brake 11 enables contactless torque transmission, enabling smooth, stepless, and stable load torque control independent of speed. The drive current of the hysteresis brake 11 can be controlled via software, enabling adjustable load torque, and therefore load force.

[0035] In the above-described embodiment of the present application, the provision of a hysteresis brake 11 allows for a constant and adjustable load force to be provided by adjusting the drive current, thereby simulating the resistance encountered by the moving block 210 of the interpupillary distance adjustment module during movement, thereby detecting and adjusting the displacement of the moving block 210, thereby improving the displacement adjustment accuracy of the lens. Furthermore, the driving force can be controlled within a reasonable range using the force sensor 6. The actual displacement of the moving block 210 can be measured using the calibration element 17 and the rangefinder 7, and compared with the ideal displacement to test the displacement measurement accuracy.

[0036] Reference Figure 4 In some embodiments, the testing device 100 also includes a coupling 8 and a first transmission shaft 5, the gear 9 is sleeved on the first transmission shaft 5, the hysteresis brake 11 includes a second transmission shaft 111 coaxially arranged with the first transmission shaft 5, the coupling 8 connects the first transmission shaft 5 and the second transmission shaft 111, and the central axis direction of the first transmission shaft 5 is set perpendicular to the moving direction of the rack 10.

[0037] The coaxial setting means that the central axes of the two coincide with each other, and the gear 9 is sleeved on the first transmission shaft 5 and can rotate with the first transmission shaft 5. The hysteresis brake 11 includes a main body and a second transmission shaft 111 connected to the main body. The first transmission shaft 5 and the second transmission shaft 111 are connected by a coupling 8, which plays the role of connecting and transmitting torque. It is worth mentioning that the coupling 8 is made larger in the direction of the central axis of the first transmission shaft 5 and the second transmission shaft 111, that is, the coupling 8 is sleeved on most of the length of the first transmission shaft 5 and also on most of the length of the second transmission shaft 111. The length refers to the distance along the central axis of the first transmission shaft 5, which can protect the first transmission shaft 5 and the second transmission shaft 111. In addition, the central axis of the first transmission shaft 5 is arranged perpendicular to the moving direction of the rack 10. The moving direction of the rack 10 is also the length direction of the rack 10, which is also the arrangement direction of the first bracket 41 and the second bracket 42. The larger gear 9 and the hysteresis brake 11 are not arranged in a straight line with the rack 10, which can reduce the length of the entire test device 100 and is conducive to the reasonable arrangement of space.

[0038] Reference Figure 5 In some embodiments, the positioning fixture 3 is provided with a positioning groove and a positioning column 31. The positioning groove is used to accommodate the workpiece 200 to be measured, and the positioning column 31 is used to cooperate with the hole position of the workpiece 200 to be measured. The testing device 100 also includes a clamping fixture 16. The clamping fixture 16 includes a pressure plate 161 and a pressure rod 162 provided on the pressure plate 161. The pressure plate 161 is installed on the workbench 2 so that the pressure rod 162 is plugged into the positioning column 31. The workpiece 200 to be measured may have some holes or have a general or specific shape. When designing the fixture, some positioning grooves and positioning columns 31 can be designed according to the shape and structural characteristics of the workpiece 200 to be measured, so as to position the workpiece 200 to be measured. The clamping fixture 16 is movably installed. After the workpiece 200 to be measured is placed on the positioning fixture 3 and positioned, the clamping fixture 16 is pressed on the workpiece 200 to reduce the risk of movement of the workpiece 200 to be measured during the detection process. Specifically, the clamping tool 16 may include a pressing plate 161 and a pressing rod 162 . The pressing rod 162 is plugged into the positioning column 31 . The pressing plate 161 can rotate or move up and down or left and right to plug the pressing rod 162 installed thereon into the positioning column 31 for positioning.

[0039] Reference Figure 5 and Figure 6 In some embodiments, the moving assembly further comprises a mounting base 12 and a threaded member 13. The mounting base 12 is provided with a first mounting hole and an elastic pin 14. The first bracket 41 is provided with a positioning hole and a second mounting hole. The elastic pin 14 passes through the positioning hole from the bottom of the first bracket 41 and extends out of the first bracket 41. The threaded member 13 penetrates the first mounting hole and the second mounting hole to connect the mounting base 12 to the first bracket 41. The mounting base 12 is a base that is connected to the first bracket 41 and can move together with the first bracket 41. Specifically, the mounting base 12 is provided at the bottom of the first bracket 41, that is, vertically below. The top of the mounting base 12 is provided with a first mounting hole. The positioning pin is used to connect with the moving block 210 to achieve positioning and installation of the moving block 210. The positioning pin can be an elastic elastic pin 14. The first bracket 41 is provided with a positioning hole and a second mounting hole. The elastic pin 14 passes through the positioning hole from the bottom of the first bracket 41 and extends a distance from the top of the first bracket 41 to connect with the moving block 210. The screw member 13 is inserted into the first positioning hole and the second positioning hole to mount the mounting seat 12 on the first bracket 41 , thereby achieving connection between the first bracket 41 and the mounting seat 12 .

[0040] Reference Figure 5 and Figure 6, the number of elastic pins 14 here is generally two, and the two elastic pins 14 are respectively connected to the two moving blocks 210 of the pupil distance adjustment module. Since there may be deviations in the installation of the positioning fixture 3, or there may be deviations in the positioning position on the positioning fixture 3, or there may be deviations in the installation of the pupil distance adjustment module itself, the two moving blocks 210 may not be at the same height, that is, the bottom heights of the two moving blocks 210 along the vertical direction are inconsistent, or there is a certain degree of deviation in the vertical heights of the two moving blocks 210, so the positioning pins are set as elastic pins 14, and an elastic space 121 is set in the installation. The elastic pins 14 can be extended and retracted in the elastic space 121 along the vertical direction, thereby offsetting the deviation in the vertical height of the moving block 210. Compared with setting a positioning pin with a fixed position, it can reduce the damage caused by collision with the moving block 210, and can also accommodate the deviation in the height direction of the moving block 210. Specifically, referring to Figure 7 The elastic pin 14 may include a spring 141 disposed in the elastic space 121 and a pin body 142 mounted on one end of the spring 141, and the end of the pin body 142 away from the spring 141 is connected to the moving block 210. It should be noted that the vertical direction in this application is as follows: Figure 2 As shown by the arrow Y in the middle, the horizontal direction is Figure 2 Indicated by the arrow X.

[0041] In some embodiments, the first bracket 41 is provided with a plurality of positioning holes, and the elastic pin 14 can be installed in any of the positioning holes. The elastic pin 14 is provided in the previous embodiment to accommodate the height deviation of the two moving blocks 210 in the vertical direction. In this embodiment, a plurality of positioning holes are provided on the first bracket 41. If there is a deviation of the moving block 210 in a horizontal plane perpendicular to the vertical direction, or if there is a slight difference in the horizontal position of the moving block 210 of different models of pupil distance adjustment modules, the elastic pin 14 can be moved to the positioning hole corresponding to the installation position of the moving block 210 to achieve the connection between the elastic pin 14 and the moving block 210. The plurality of positioning holes are provided in this embodiment to overcome the position deviation of the moving block 210 in the horizontal plane of the moving block 210.

[0042] Reference Figure 8 In some embodiments, the second bracket 42 includes a bottom plate 421 and a vertical plate 422 disposed on the bottom plate 421. The bottom plate 421 is slidably connected to the workbench 2, the rack 10 is mounted on the bottom plate 421, and one end of the force sensor 6 is connected to the vertical plate 422. The bottom plate 421 can be a horizontal plate, and the vertical plate 422 is disposed above or on the top of the bottom plate 421. The vertical plate 422 can extend in the vertical direction. The bottom plate 421 is used to be slidably connected to the workbench 2 and can slide along the workbench 2 under the drive of an external force. Because the second bracket 42 is entirely disposed below the first bracket 41, the vertical plate 422 is provided to extend in the vertical direction, which facilitates connection with the other end of the sensor in the horizontal direction.

[0043] Reference Figure 8 and Figure 9 In some embodiments, a limiting plate 423 extending toward the first bracket 41 is further provided on the bottom plate 421, and a gap 15 is provided between the limiting plate 423 and the bottom surface of the first bracket 41 facing the workbench 2, and the limiting plate 423 is used to limit the distance that the first bracket 41 moves downward toward the limiting plate 423.

[0044] The limiting plate 423 is provided on the side of the bottom plate 421 facing the first bracket 41. The bottom plate 421 is located below the first bracket 41. The limiting plate 423 extends toward the first bracket 41 and does not exceed the first bracket 41. Specifically, a gap 15 is provided between the top surface of the limiting plate 423 and the bottom surface of the first bracket 41. With such a configuration, if the moving block 210 has vertical fluctuations during the detection process, the first bracket 41 will hit the limiting plate 423 when the vibration is too large, and the limiting plate 423 can play a limiting role. The gap 15 between the first bracket 41 and the limiting plate 423 is provided to avoid friction between the first bracket 41 and the limiting plate 423 during the movement of the first bracket 41 during normal use, thereby increasing the sliding resistance. If a resistance is added, the displacement measurement accuracy of the moving block 210 will also be affected.

[0045] Reference Figure 9 and Figure 10 In some embodiments, a first stopper is provided on the first bracket 41, and a second stopper is provided on the vertical plate 422. One end of the force sensor 6 abuts the first stopper, and the other end of the force sensor 6 abuts the second stopper. The first stopper and the second stopper are respectively used to abut the ends of the force sensor 6, and both abut in the same horizontal direction, facilitating pressure detection and improving the accuracy of force detection.

[0046] Reference Figure 9 and Figure 10 In some embodiments, the first blocking member includes two first blocking blocks 411 spaced apart from each other, with a first spacer 412 disposed between the two first blocking blocks 411. The second blocking member includes two second blocking blocks 4221 spaced apart from each other, with a second spacer 4222 disposed between the two second blocking blocks 4221. The testing device 100 further includes a first fastener 18 and a second fastener 19. The first fastener 18 passes through the first spacer 412 and is installed at one end, while the second fastener 19 passes through the second spacer 4222 and is installed at the other end. The two first blocking blocks 411 abut against one end of the sensor, and the two second blocking blocks 4221 also abut against the other end of the sensor. The first fastener 18 passes through the first spacer 412 to secure one end of the force sensor 6 to the first bracket 41, and the second fastener 19 passes through the second spacer 4222 to secure the other end of the force sensor 6 to the vertical plate 422, thereby achieving fixed installation of the force sensor 6.

[0047] In some embodiments, the sliding direction of the moving block 210, the sliding direction of the second bracket 42, and the moving direction of the rack 10 are all the same. The same sliding direction or moving direction can reduce the loss of non-horizontal components, improve the accuracy of sliding, and thus improve the accuracy of detection.

[0048] The above are merely exemplary embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect application in other related technical fields, within the technical concept of the present invention, are included in the patent protection scope of the present invention.

Claims

1. A testing device, characterized in that: include: Workbench; A positioning tool, the positioning tool is installed on the workbench and is used to place the workpiece to be measured; A moving assembly, the moving assembly comprising a sliding frame, a calibration piece, and a force sensor, the sliding frame comprising a first bracket and a second bracket, the first bracket being connected to the moving block of the workpiece to be measured, the second bracket being slidably mounted on the workbench, the calibration piece being mounted on the first bracket or the second bracket and being capable of sliding therewith; one end of the force sensor being connected to the first bracket, and the other end being connected to the second bracket; a distance meter, the distance meter being used to measure the sliding distance of the calibration piece; a transmission assembly, the transmission assembly comprising a gear and a rack meshing with each other, the rack being mounted on the second bracket; A hysteresis brake is connected to the gear transmission, and the hysteresis brake is used to provide resistance to prevent the gear from rotating.

2. The testing device according to claim 1, wherein: The testing device also includes a coupling and a first transmission shaft, the gear is sleeved on the first transmission shaft, the hysteresis brake includes a second transmission shaft coaxially arranged with the first transmission shaft, the coupling connects the first transmission shaft and the second transmission shaft, and the central axis direction of the first transmission shaft is arranged perpendicular to the moving direction of the rack.

3. The testing device according to claim 1, wherein: The movable assembly also includes a mounting seat and a threaded member, the mounting seat is provided with a first mounting hole and an elastic pin, the first bracket is provided with a positioning hole and a second mounting hole, the elastic pin passes through the positioning hole from the bottom of the first bracket and extends out of the first bracket, the threaded member is inserted into the first mounting hole and the second mounting hole to connect the mounting seat and the first bracket.

4. The testing device according to claim 3, wherein: The first bracket is provided with a plurality of positioning holes, and the elastic pin can be installed in any of the positioning holes.

5. The testing device according to claim 1, wherein: The second bracket includes a bottom plate and a vertical plate arranged on the bottom plate, the bottom plate is slidably connected to the workbench, the rack is installed on the bottom plate, and one end of the force sensor is connected to the vertical plate.

6. The testing device according to claim 5, wherein: A first blocking member is provided on the first bracket, a second blocking member is provided on the vertical plate, one end of the force sensor abuts against the first blocking member, and the other end of the force sensor abuts against the second blocking member.

7. The testing device according to claim 6, wherein: The first blocking member includes two first blocking blocks arranged at an interval, and a first interval is set between the two first blocking blocks. The second blocking member includes two second blocking blocks arranged at an interval, and a second interval is set between the two second blocking blocks. The testing device also includes a first fastener and a second fastener. The first fastener passes through the first interval and is installed at one end of the force sensor, and the second fastener passes through the second interval and is installed at the other end of the force sensor.

8. The testing device according to claim 5, wherein: The bottom plate is further provided with a limit plate extending toward the first bracket, a gap is provided between the limit plate and the bottom surface of the first bracket facing the workbench, and the limit plate is used to limit the distance that the first bracket moves downward toward the limit plate; And / or, the sliding direction of the moving block, the sliding direction of the second bracket and the moving direction of the rack are all the same.

9. The testing device according to any one of claims 1 to 5, characterized in that: The positioning tool is provided with a positioning groove and a positioning column, the positioning groove is used to accommodate the workpiece to be tested, and the positioning column is used to cooperate with the hole position of the workpiece to be tested. The testing device also includes a clamping tool, and the clamping tool includes a pressure plate and a pressure rod arranged on the pressure plate. The pressure plate is installed on the workbench to insert the pressure rod onto the positioning column.

10. The testing device according to any one of claims 1 to 5, characterized in that The moving components, the transmission components and the hysteresis brakes are each in two groups and are connected in a one-to-one correspondence. The workpiece to be measured includes two moving blocks, and one moving component is connected to one moving block.

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