Torque wrench testing device

Abstract

The utility model discloses a torque wrench testing device. The torque wrench testing device comprises a workbench, a linear guide rail, a pressure detector, a displacement detector, a rotating part and a driving mechanism, wherein the workbench is provided with a hollow cavity; the linear guide rail is arranged on the workbench; the pressure detector is slidably arranged on the linear guide rail, the displacement detector comprises a body and a brush head, the body is arranged on the workbench, and the brush head is arranged on the pressure detector and slidably connected with the body; the rotating piece is rotatably arranged on the workbench in a penetrating mode, and the working end of the torque wrench is clamped to one end of the rotating piece. The driving mechanism is arranged in the hollow cavity and connected with the other end of the rotating piece. The number of the torque sensors of the torque wrench testing device is reduced, the testing measuring range is large, the structure of the torque wrench testing device is more compact and simpler, the production cost is reduced, the equipment stability is improved, only one torque wrench clamping end is arranged, and the risk that the torque wrench testing device is damaged due to wrong clamping of workers is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of torque detection machinery, and in particular to a torque wrench testing device. Background Art

[0002] The common method of torque detection is to use a tool to apply radial rotation torque to the torque sensor on a torque test bench, causing the sensor body to produce a slight deformation, and then derive the result by amplifying and converting the change in the strain gauge signal value. However, the effective measurement range of a single torque sensor is limited and is greatly affected by the use environment factors, requiring frequent calibration; the torque wrench test bench on industrial sites needs to be equipped with multiple torque sensors, and the equipment structure is complex and the operation is cumbersome. Utility Model Content

[0003] The main purpose of the present application is to provide a torque wrench testing device, aiming to solve the technical problems of the torque wrench testing device having a complex structure, high production cost, multiple torque sensors which make it easy to misplace the torque sensors, a small test range, and cumbersome operation.

[0004] To achieve the above objectives, the present application provides a torque wrench testing device, the torque wrench testing device comprising:

[0005] A workbench, wherein the workbench has a hollow cavity;

[0006] A linear guide rail, the linear guide rail is arranged on the workbench;

[0007] A pressure detector, which can be slidably disposed on the linear guide rail and is used to detect the reaction force of the torque wrench;

[0008] A displacement detector, the displacement detector comprising a body and a brush head, the body being arranged on the workbench, the brush head being arranged on the pressure detector and being slidably connected with the body, the displacement detector being used to measure the force arm length of the torque wrench;

[0009] A rotating member, the rotating member is rotatably arranged on the workbench, and the working end of the torque wrench is engaged with one end of the rotating member;

[0010] A driving mechanism is disposed in the hollow cavity and connected to the other end of the rotating member, and is used to drive the rotating member to rotate, so that the rotating member drives the torque wrench to rotate.

[0011] Furthermore, in one embodiment, the torque wrench testing device further includes a slide and a locking member, the slide can be slidably disposed on the linear guide rail, the locking member and the displacement detector are both disposed on the slide, and the locking member is used to lock the slide.

[0012] Further, in one embodiment, the driving mechanism includes a driving member, a transmission member and a connecting member, the driving member, the transmission member and the connecting member are all arranged in the hollow cavity, and the transmission member is connected to the driving member and the connecting member respectively.

[0013] Furthermore, in one embodiment, the driving mechanism further includes a slider, the slider is slidably disposed on the transmission member, the first end of the connecting member is disposed on the slider, and the second end of the connecting member is disposed on the rotating member.

[0014] Furthermore, in one embodiment, the connecting member is a long strip structure, and the width of the first end is smaller than the width of the second end.

[0015] Furthermore, in one embodiment, the driving mechanism further includes a synchronous transmission component, one end of the synchronous transmission component is connected to the output end of the driving member, and the other end is connected to the transmission member, and the transmission member and the driving member are arranged in parallel in the longitudinal direction.

[0016] Further, in one embodiment, the synchronous transmission assembly includes a synchronous belt, a first synchronous gear and a second synchronous gear, the first synchronous gear is sleeved on one end of the transmission member, the second synchronous gear is sleeved on the output end of the driving member, and the synchronous belt is meshed and connected with the first synchronous gear and the second synchronous gear respectively.

[0017] Furthermore, in one embodiment, the torque wrench testing device further includes an origin sensor and a clamp, wherein the origin sensor is disposed on the workbench, one end of the clamp is disposed on the displacement detector, and the other end of the clamp is clamped into the origin sensor.

[0018] Furthermore, in one embodiment, the torque wrench testing device further comprises a touch screen computer, which is disposed on the workbench and is electrically connected to the pressure detector, the displacement detector and the origin sensor respectively.

[0019] Furthermore, in one embodiment, the torque wrench testing device also includes a first bearing seat and a second bearing seat, the first bearing seat is arranged on the workbench, and the second bearing seat is arranged in the hollow cavity at a position corresponding to the first bearing seat, the workbench is provided with a through hole, and the through hole is respectively connected to the axial hole of the first bearing seat and the axial hole of the second bearing seat, the rotating member passes through the first bearing seat, the through hole and the second bearing seat in sequence, and is respectively connected to the first bearing seat and the second bearing seat by interference fit.

[0020] In the technical solution provided by the present application, the driving mechanism is arranged in the hollow cavity of the workbench, and the driving mechanism and the torque wrench are respectively connected through the rotating member, so that the driving mechanism drives the rotating member to rotate, thereby causing the rotating member to drive the torque wrench to rotate. During the rotation of the torque wrench, the handle abuts against the pressure detector, so that the handle gives the pressure detector a reaction force, and the pressure detector detects the magnitude of the reaction force, and the displacement detector is fixed on the pressure detector, so that the displacement detector moves with the pressure detector, and then the displacement detector detects the distance of movement. According to the torque T being equal to the product of the force F and the length r of the lever arm, the torque value can be calculated. The number of torque sensors of the torque wrench test device is reduced, and the test range is large, so that the structure of the torque wrench test device is more compact and simple, the production cost is reduced, and the stability of the equipment is improved. There is only one torque wrench engagement end, which avoids the risk of damage to the torque wrench test device caused by the staff getting it wrong. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0022] Figure 1 A schematic diagram of a torque wrench testing device for testing a short torque wrench according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a torque wrench structure for testing a long torque wrench of a torque wrench testing device according to an embodiment of the present application;

[0024] Figure 3 This is a structural schematic diagram of a torque wrench testing device from a first perspective according to an embodiment of the present application;

[0025] Figure 4 A top view of a torque wrench testing device according to an embodiment of the present application;

[0026] Figure 5 A partial first-view structural schematic diagram of a torque wrench testing device according to an embodiment of the present application;

[0027] Figure 6 A partial second-view structural schematic diagram of a torque wrench testing device according to an embodiment of the present application.

[0028] Among them, 100, torque wrench testing device; 10, workbench; 101, hollow cavity; 11, linear guide; 20, pressure detector; 30, displacement detector; 301, body; 302, brush head; 40, rotating part; 50, driving mechanism; 501, driving part; 502, transmission part; 503, connecting part; 504, slider; 506, synchronous rotation component; 507, synchronous belt; 508, first synchronous gear; 509, second synchronous gear; 60, slide; 70, locking part; 80, origin sensor; 90, clamp; 91, touch screen computer; 92, first bearing seat; 93, second bearing seat; 200, torque wrench; 201, working end; 202, handle. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only. In the description of this application, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0030] In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. All technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0031] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] Please refer to Figure 1-Figure 6 , an embodiment of the present application discloses a torque wrench testing device 100 .

[0033] In one embodiment, if Figure 1-Figure 4 As shown, the torque wrench testing device 100 includes a workbench 10 , a linear guide rail 11 , a pressure detector 20 , a displacement detector 30 , a rotating member 40 and a driving mechanism 50 .

[0034] The workbench 10 is a carrier of the entire device. The workbench 10 has a hollow cavity 101 , so that some parts can be arranged in the hollow cavity 101 , so that the torque wrench testing device 100 has a compact structure and a small volume.

[0035] The linear guide 11 is fixed on the workbench 10 along the length direction of the workbench 10. The pressure detector 20 not only measures the reaction force of the torque wrench 200, but also carries the handle 202 of the torque wrench 200, and the central area of ​​the handle 202 of the torque wrench 200 abuts against the pressure detector 20, so that the pressure detector 20 can measure the reaction force of the torque wrench 200. The pressure detector 20 can be slidably arranged on the linear guide 11, that is, the pressure detector 20 can slide on the linear guide 11, and then the position of the pressure detector 20 can be specifically adjusted according to the actual force arm length r of the torque wrench 200, so that the torque wrench testing device 100 can achieve a large test range by adjusting the position of the pressure detector 20.

[0036] Exemplarily, the pressure detector 20 can be a pressure sensor, and the output of the pressure sensor is generally an analog signal. The analog signal refers to an information parameter that is expressed as a continuous signal within a given range. Or within a continuous time interval, the characteristic quantity representing the information can be presented as a signal of any numerical value at any moment. The pressure sensors we usually use are mainly made using the piezoelectric effect, and such sensors are also called piezoelectric sensors. The displacement detector 30 can be a displacement sensor. The measurement of displacement is generally divided into two types: measuring the physical size and mechanical displacement, and the mechanical displacement measurement method is preferred.

[0037] The displacement detector 30 is used to detect the arm length r of the torque wrench 200. The arm length r refers to the distance from the contact point between the handle 202 and the pressure sensor to the center of the rotating part 40. The displacement detector 30 includes a main body 301 and a brush head 302. The main body 301 is fixed on the workbench 10, and the brush head 302 is fixed on the pressure detector 20. The brush head 302 is slidably connected to the main body 301, that is, the brush head 302 can slide on the main body 301, so that the brush head 302 follows the pressure detector 20 to move on the main body 301, so that the main body 301 can sense the displacement value of the brush head 302.

[0038] The rotating member 40 can be rotatably penetrated on the workbench 10. Specifically, the rotating member 40 is a rotating shaft. The torque wrench testing device 100 also includes a first bearing seat 92 and a second bearing seat 93. The first bearing seat 92 is fixed on the surface of the workbench 10, and the second bearing seat 93 is fixed at a position of the hollow cavity 101 corresponding to the first bearing seat 92. A through hole is opened on the workbench 10, and the through hole is respectively connected with the axial hole of the first bearing seat 92 and the axial hole of the second bearing seat 93, so that the transmission member 502 can pass through the axial hole of the first bearing seat 92, the through hole and the axial hole of the second bearing seat 93 in sequence, and the transmission member 502 is respectively connected with the first bearing seat 92 and the second bearing seat 93 by interference fit, so that the rotating member 40 can rotate.

[0039] The driving mechanism 50 is fixed in the hollow cavity 101, so that the structure of the torque wrench testing device 100 is more compact and small in size. The driving mechanism 50 is connected to the other end of the rotating member 40, and the working end 201 of the torque wrench 200 is connected to one end of the rotating member 40 by snapping, so that the driving mechanism 50 drives the rotating member 40 to rotate, and the rotation of the rotating member 40 drives the torque wrench to rotate. During the rotation process, the torque wrench 200 exerts a reaction force on the pressure detector 20, so that the pressure detector 20 detects the magnitude of the reaction force, that is, the driving mechanism 50 is used to drive the rotating member 40 to rotate, so that the rotating member 40 drives the torque wrench 200 to rotate and generates a reaction force on the pressure detector 20. Therefore, according to the fact that the torque T is equal to the product of the force F and the arm length r, the international unit is Newton meter N·ms, the magnitude of the torque can be calculated, wherein the force F is the reaction force, and the arm length r is the distance from the contact point between the handle 202 and the pressure sensor to the center of the rotating member 40.

[0040] In this embodiment, by setting the driving mechanism 50 in the hollow cavity 101 of the workbench 10, and then connecting the driving mechanism 50 and the torque wrench 200 respectively through the rotating member 40, the driving mechanism 50 drives the rotating member 40 to rotate, so that the rotating member 40 drives the torque wrench 200 to rotate, and the torque wrench 200 is rotated because the handle 202 abuts against the pressure detector 20 during the rotation process, so that the handle 202 gives the pressure detector 20 a reaction force, and the pressure detector 20 detects the magnitude of the reaction force, and the displacement detector 30 is fixed on the pressure detector 20, so that the displacement detector 30 moves with the pressure detector 20, and then the displacement detector 30 detects the distance moved, and the torque value can be calculated according to the torque T being equal to the product of the force F and the arm length r. It is achieved to reduce the number of torque sensors of the torque wrench test device 100, make the structure of the torque wrench test device 100 more compact and simple, reduce production costs, improve equipment stability, and there is only one torque wrench 200 clamping end, avoiding the risk of damage to the torque wrench test device 100 caused by the staff clamping wrongly. By sliding the pressure detector 20 on the linear guide rail 11, the fixed position of the handle 202 can be adjusted according to the arm length r of the torque wrench 200, so that only one displacement detector 30 and one pressure detector 20 are needed to achieve a large test range.

[0041] In one embodiment, the torque wrench testing device 100 also includes a slide 60 and a locking member 70. The slide 60 is slidably connected to the slide rail so that the slide 60 can slide on the slide rail. The locking member 70 is arranged on the slide 60, and the locking member 70 is used to lock the slide 60. When the pressure detector 20 is adjusted into place, the slide 60 is locked by tightening the locking member 70, so that during the test, the pressure detector 20 will not be offset when subjected to force.

[0042] In one embodiment, if Figure 3 and Figure 4 As shown, the torque wrench testing device 100 also includes a clamp 90 and an origin sensor 80, one end of the clamp 90 is arranged on the displacement detector 30, the origin sensor 80 is fixed on the workbench 10, one end of the clamp 90 is fixed on the displacement detector 30, and the other end of the clamp 90 is clamped into the origin sensor 80.

[0043] The pressure sensor needs to return to the origin position each time the power is turned off and then turned on again, and then the position of the pressure sensor is adjusted according to the force arm length r of the torque wrench 200. When aligning the origin, the pressure detection device slides and drives the card 90 to slide toward the origin sensor 80 until the card 90 is stuck in the origin sensor 80, and the card 90 blocks the laser emitted by the origin sensor 80, and then slowly withdraws from the origin sensor 80 in the opposite direction. When the card 90 completely withdraws from the sensing groove of the origin sensor 80, the position at this time is the origin position, and the origin alignment is completed.

[0044] In one embodiment, the torque wrench 200 test device also includes a touch screen computer 91, which is fixed on the workbench 10, and the touch screen computer 91 is electrically connected to the pressure detector 20, the displacement detector 30 and the origin sensor 80, respectively, so that the pressure detector 20, the displacement detector 30 and the origin sensor 80 can send data to the touch screen computer 91. After receiving the data, the touch screen computer 91 analyzes and calculates the data according to a preset program to obtain the torque, and can also store the received data for the staff to view later.

[0045] In one embodiment, if Figure 5 and Figure 6 As shown, the driving mechanism 50 includes a driving member 501, a transmission member 502, a connecting member 503, a slider 504, and a synchronous transmission assembly. The driving member 501, the transmission member 502, the connecting member 503, the slider 504, and the synchronous transmission assembly are all arranged in the hollow cavity 101 of the workbench 10, so that the structure of the torque wrench testing device 100 is more compact. The output end of the driving member 501 is connected to one end of the synchronous transmission assembly, and the other end of the synchronous transmission assembly is connected to one end of the driving member 502. The driving member 502 and the driving member 501 are arranged in parallel along the longitudinal direction, so that the structure of the torque wrench testing device 100 is more compact and the volume is reduced. The other end of the transmission member 502 is connected to the first end of the connecting member 503. The second end of the connecting member 503 is connected to one end of the rotating member 40, and the working end 201 of the torque wrench 200 is engaged with the other end of the rotating member 40, and the handle 202 of the torque wrench 200 abuts against the pressure detector 20, so that the driving member 501 drives the synchronous component to rotate, and the synchronous rotating component 506 transmits the transmission force output by the driving member 501 to the transmission member 502 synchronously through its own synchronization characteristics, so that the transmission member 502 rotates and drives the connecting member 503 to move, and the movement of the connecting member 503 causes the rotating member 40 to rotate, and the rotating member 40 drives the handle 202 of the torque wrench 200 to rotate around the working end 201, so that the pressure detector 20 is subjected to a reaction force.

[0046] Exemplarily, the driving member 501 may be a stepping motor or a servo motor, and the transmission member 502 may be a lead screw.

[0047] Furthermore, the driving mechanism 50 also includes a slider 504, which can be slidably arranged on the transmission member 502, that is, the slider 504 can slide along the transmission member 502, the first end of the connecting member 503 is fixed on the slider 504, and the second end of the connecting member 503 is fixed on the rotating member 40, so that the connecting member 503 can slide along the transmission member 502.

[0048] The connecting member 503 is a long strip structure, and the width of the connecting member 503 gradually increases from the first end to the second end. Therefore, the width of the first end of the connecting member 503 is smaller than the width of the second end of the connecting member 503.

[0049] Furthermore, the synchronous transmission assembly includes a synchronous belt 507, a first synchronous gear 508 and a second synchronous gear 509. The first synchronous gear 508 is sleeved on one end of the transmission member 502, and the second synchronous gear 509 is sleeved on the output end of the driving member 501. The synchronous belt 507 is respectively meshed and connected with the first synchronous gear 508 and the second synchronous gear 509, so that when the transmission member 502 and the driving member 501 are arranged in parallel, the synchronous transmission assembly can ensure a strict transmission ratio.

[0050] Synchronous belt 507 transmission is meshing type belt transmission. It transmits motion through the meshing of the equidistantly distributed transverse teeth on the inner surface of the transmission belt and the corresponding tooth grooves on the pulley, which can ensure a strict transmission ratio.

[0051] In summary, the present application measures the arm length r of the torque wrench 200 through the displacement detector 30, and measures the magnitude of the reaction force through the pressure detector 20, and then calculates the torque by the torque T being equal to the product of the force F and the arm length r, and then cooperates with the mobile pressure detector 20 to adapt to different arm lengths r of the torque wrench 200. The structure is compact and simple. A detection channel is established by a displacement detector 30 and a pressure detector 20, and a detection channel is established; the risk of damage to the torque wrench testing device 100 caused by staff errors is avoided, and the torque sensor is reduced, thereby reducing costs; and the detection channel can test torque wrenches 200 of various sizes, so that the test range of the torque wrench testing device 100 is large and the operation is simple, and then the obtained torque is compared with the preset value through the touch screen computer 91 to determine whether the torque of the torque wrench 200 is within the error range. This is different from the prior art, in which a torque sensor is provided to directly measure the torque value. However, due to the range limitation of the torque sensor, a specific torque sensor must be provided according to the lever arm length r of the torque wrench 200. This results in the need to provide multiple torque sensors on the test bench to meet the lever arm lengths r of different torque wrenches 200, resulting in a complicated structure. In addition, multiple torque sensors make it easy for staff to misplace the torque wrench 200, which makes the operation cumbersome.

[0052] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A torque wrench testing device, characterized in that: The torque wrench testing device comprises: A workbench, wherein the workbench has a hollow cavity; A linear guide rail, the linear guide rail is arranged on the workbench; A pressure detector, which can be slidably disposed on the linear guide rail and is used to detect the reaction force of the torque wrench; A displacement detector, the displacement detector comprising a body and a brush head, the body being arranged on the workbench, the brush head being arranged on the pressure detector and being slidably connected with the body, the displacement detector being used to measure the force arm length of the torque wrench; A rotating member, the rotating member is rotatably arranged on the workbench, and the working end of the torque wrench is engaged with one end of the rotating member; A driving mechanism is disposed in the hollow cavity and connected to the other end of the rotating member.

2. The torque wrench testing device according to claim 1, characterized in that: The torque wrench testing device also includes a slide and a locking member. The slide can be slidably arranged on the linear guide rail. The locking member and the displacement detector are both arranged on the slide. The locking member is used to lock the slide.

3. The torque wrench testing device according to claim 1, characterized in that: The driving mechanism comprises a driving member, a transmission member and a connecting member. The driving member, the transmission member and the connecting member are all arranged in the hollow cavity, and the transmission member is connected to the driving member and the connecting member respectively.

4. The torque wrench testing device according to claim 3, characterized in that: The driving mechanism further comprises a slider, which is slidably disposed on the transmission member, a first end of the connecting member is disposed on the slider, and a second end of the connecting member is disposed on the rotating member.

5. The torque wrench testing device according to claim 3, characterized in that: The connecting piece is a long strip structure, and the width of the first end is smaller than the width of the second end.

6. The torque wrench testing device according to claim 3, characterized in that: The driving mechanism further comprises a synchronous transmission component, one end of which is connected to the output end of the driving member, and the other end of which is connected to the transmission member, and the transmission member and the driving member are arranged in parallel in the longitudinal direction.

7. The torque wrench testing device according to claim 6, characterized in that: The synchronous transmission assembly includes a synchronous belt, a first synchronous gear and a second synchronous gear. The first synchronous gear is sleeved on one end of the transmission member, and the second synchronous gear is sleeved on the output end of the driving member. The synchronous belt is meshed and connected with the first synchronous gear and the second synchronous gear respectively.

8. The torque wrench testing device according to claim 1, characterized in that: The torque wrench testing device also includes an origin sensor and a clamping piece. The origin sensor is arranged on the workbench, one end of the clamping piece is arranged on the displacement detector, and the other end of the clamping piece is clamped into the origin sensor.

9. The torque wrench testing device according to claim 8, characterized in that: The torque wrench testing device also includes a touch screen computer, which is arranged on the workbench and is electrically connected to the pressure detector, the displacement detector and the origin sensor respectively.

10. The torque wrench testing device according to claim 1, characterized in that: The torque wrench testing device also includes a first bearing seat and a second bearing seat, the first bearing seat is arranged on the workbench, and the second bearing seat is arranged in the hollow cavity at a position corresponding to the first bearing seat, the workbench is provided with a through hole, and the through hole is respectively connected to the axial hole of the first bearing seat and the axial hole of the second bearing seat, the rotating member passes through the first bearing seat, the through hole and the second bearing seat in sequence, and is respectively connected to the first bearing seat and the second bearing seat by interference fit.

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