Verification and calibration tool for torquemeter

Abstract

The utility model relates to a verification and calibration tool of a torquemeter. The verification and calibration tool comprises a horizontal substrate. A mounting mechanism is arranged on one side of the base plate and is used for mounting and fixing a torquemeter to be detected; a mounting mechanism is arranged on one side of the base plate, a force application device is arranged on the other side of the base plate, a standard torque wrench is arranged between the force application device and the mounting mechanism, a wrench head of the standard torque wrench is adaptively connected with an adapter square sleeve on an interface of the torquemeter to be detected, and a wrench tail of the standard torque wrench is connected with the force application device; the force applying device comprises a loading mechanism and a stop lever mechanism, the stop lever mechanism is connected to the loading mechanism in a sliding mode, the stop lever mechanism comprises a vertical stop lever, the stop lever is detachably connected with a positioning part used for containing the spanner tail, and the positioning part can slide up and down along the stop lever. In the whole verification process, the wrench head and the wrench tail of the standard torque wrench are always located on the same horizontal line, so that the verification precision is effectively ensured; and the whole verification and calibration tool is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model belongs to the technical field of torque measuring instrument calibration, and in particular relates to a verification and calibration tool for a torque meter. Background Art

[0002] A torque meter, also known as a torque tester, torque tester or torque tester, is a precision measuring instrument specifically used to measure the magnitude of the torsional torque borne or generated on various rotating or non-rotating mechanical parts. During the use of a torque meter, due to mechanical wear, aging of electronic components or environmental factors, its measurement accuracy may gradually decrease; regular calibration can promptly detect and correct this deviation to ensure that the measurement results are consistent with the true value.

[0003] According to JJG797-2013 "Torque Wrench Calibrator", the calibration equipment used for calibrating torque meters is a standard torque wrench, a calibration lever and a force weight. The accuracy level of the standard torque wrench is 3 times better than that of the torque meter being tested. Before calibration, the torque meter being tested needs to be fixed and kept stationary, and then the calibration lever and force weight are installed. The installation process before calibration is relatively cumbersome, and it is also necessary to ensure that the left and right ends of the calibration lever are level. For low-range torque meters, there is a problem of large errors. At the same time, during the calibration process, the standard wrench needs to be installed on the torque meter being tested as a torque meter calibration wrench, but usually because the square falcon and square hole sizes at the connection interface between the two are inconsistent, it is necessary to add a transfer square sleeve. The specific structure of the transfer square sleeve is shown in CN214224437U. After the transfer, the height of the torque meter side interface will increase. If the height of the standard wrench tail is not adjusted, the wrench head and wrench tail of the standard wrench are not in a horizontal state, which will affect the calibration accuracy. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a verification and calibration tool for a torque meter, so as to avoid the problem of difficulty in ensuring the verification accuracy when verifying and calibrating a low-range torque meter.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A verification and calibration tool for a torque meter, comprising a horizontal base plate; a mounting mechanism is provided on one side of the base plate, and the mounting mechanism is used to install and fix the torque meter to be tested; a force-applying device is provided on the other side of the base plate, and a standard torque wrench is provided between the force-applying device and the mounting mechanism, the wrench head of the standard torque wrench is adaptably connected to the adapter square sleeve on the interface of the torque meter to be tested, and the wrench tail is connected to the force-applying device so as to apply torque to the standard torque wrench through the force-applying device; the force-applying device comprises a loading mechanism and a baffle mechanism, the baffle mechanism is slidably connected to the loading mechanism, the baffle mechanism comprises a vertical baffle, and a positioning portion for placing the wrench tail is detachably connected to the baffle, and the positioning portion can slide up and down along the baffle so that the wrench head and the wrench tail of the standard torque wrench are located on the same horizontal line.

[0007] To further improve the above technical solution, the positioning part includes a positioning ring, which is movably mounted on the baffle rod; a radially penetrating internal threaded hole is opened on the positioning ring and a locking bolt is connected through the internal threaded hole. Tightening the locking bolt can make the locking bolt abut against the baffle rod to fix the positioning ring.

[0008] Furthermore, a sleeve is movably mounted on the baffle rod above the positioning ring, the inner diameter of the sleeve matches the diameter of the baffle rod, and a plurality of balls are evenly distributed on the inner wall of the sleeve along the length direction of the sleeve to achieve rolling friction between the sleeve and the baffle rod.

[0009] Furthermore, the loading mechanism includes a screw and a guide rail fixed on the base plate, baffles are installed at both ends of the guide rail, and both ends of the screw are installed on the baffles on the corresponding sides through bearings and are suspended above the guide rail;

[0010] The outer surface of the screw rod is provided with an external thread, and a sliding seat is slidably connected to the guide rail. The end surface of the sliding seat parallel to the baffle is vertically provided with a penetrating internal thread hole and is threadedly connected to the screw rod through the internal thread hole;

[0011] The upper surface of the slide seat is vertically provided with a mounting hole for mounting the blocking rod, and the lower surface of the slide seat is vertically provided with a sliding groove adapted to the guide rail along the length direction of the guide rail so that the slide seat is slidably connected to the guide rail.

[0012] One end of the screw rod passes through the baffle and is fixed with a rotating hand wheel;

[0013] The loading mechanism is also provided with a braking mechanism to lock the screw rod when the slide moves to a specified position to prevent the screw rod from continuing to rotate.

[0014] Furthermore, a vertical mounting plate is fixedly connected to a position on the base plate corresponding to the position where the torque meter to be tested is installed, and the mounting plate forms the mounting mechanism;

[0015] The length direction of the mounting plate is perpendicular to the sliding direction of the blocking rod mechanism; the torque meter to be tested can be detachably mounted on the mounting plate and can be adjusted in position along the length direction of the mounting plate;

[0016] A plurality of reinforcing ribs are evenly spaced on both sides of the mounting plate, and the lower surface of each reinforcing rib is fixed to the base plate.

[0017] Furthermore, the standard torque wrench is connected to a measuring and display instrument device via a sensor.

[0018] Furthermore, handles are respectively installed on both sides of the upper surface of the substrate in the length direction.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model is a verification and calibration tool for a torque meter, in which the torque meter to be tested, a standard torque wrench and a force-applying device are all arranged on a base plate, and the wrench head of the standard torque wrench is connected to the interface on the torque meter to be tested; considering that the torque meter and the standard torque wrench are adapted and connected via an adapter square sleeve, a positioning portion that can slide up and down is arranged on the force-applying device, and then the wrench tail of the standard torque wrench is placed on the positioning portion, and the baffle mechanism is slid by the loading structure, so that the wrench head of the standard torque wrench rotates around the interface of the torque meter to be tested, and the wrench tail slides with the baffle mechanism. During the entire verification process, the wrench head and the wrench tail of the standard torque wrench are always located on the same horizontal line, effectively ensuring the verification accuracy; and the entire verification and calibration tool has a simple structure and is easy to install.

[0021] 2. The utility model is a calibration fixture for a torque meter, in which a force-applying device for applying torque and a torque meter to be tested are fixed on the same base plate. During calibration, only the hand wheel needs to be turned to drive the blocking rod mechanism to move back and forth on the screw rod through the loading mechanism, thereby applying torque to the standard torque wrench. The entire calibration process only requires determining the calibration position points of the slide on the screw rod, and no external force is required to balance the fixture. The utility model is easy to use and has high calibration accuracy.

[0022] 3. The utility model is a verification and calibration tool for a torque meter. A sleeve that can slide up and down along the stop rod is arranged above the positioning ring, and a plurality of balls are arranged on the inner wall of the sleeve, so that there is rolling friction between the sleeve and the stop rod. The tail of the lever is placed on the positioning ring and contacts with the sleeve to reduce the influence of friction when the tail of the lever swings upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view of a verification and calibration tool for a torque meter according to an embodiment of the present invention;

[0024] Figure 2 A front view of a verification and calibration tool for a torque meter according to an embodiment of the present invention;

[0025] Among them, there are a base plate 1, a torque meter to be tested 2, a standard torque wrench 3, an adapter square sleeve 4, a baffle 51, a positioning ring 52, a positioning pin 53, a sleeve 54, a guide rail 61, a screw 62, a baffle 63, a slide seat 64, a handwheel 65, a mounting plate 71, a reinforcing rib 72, a measuring and display instrument device 8, a sensor 81, and a handle 9. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0027] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] See also Figure 1 and Figure 2 A verification and calibration tool for a torque meter in a specific embodiment comprises a horizontal substrate 1; a mounting mechanism is provided on one side of the substrate 1, and the mounting mechanism is used to mount and fix the torque meter 2 to be tested; a force-applying device is provided on the other side of the substrate 1, and a standard torque wrench 3 is provided between the force-applying device and the mounting mechanism, and the wrench head of the standard torque wrench 3 is adapted to be connected with the adapter square sleeve 4 on the interface of the torque meter 2 to be tested, and the wrench tail is connected with the force-applying device so as to apply torque to the standard torque wrench 3 through the force-applying device;

[0030] The force-applying device includes a loading mechanism and a baffle mechanism, wherein the baffle mechanism is slidably connected to the loading mechanism, and includes a vertical baffle 51, to which a positioning portion for placing the tail of the standard torque wrench 3 is detachably connected, and the positioning portion can slide up and down along the baffle 51 so that the wrench head and the wrench tail of the standard torque wrench 3 are located on the same horizontal line.

[0031] In an embodiment of the present invention, a verification and calibration tool for a torque meter is provided, wherein the torque meter 2 to be tested, a standard torque wrench 3 and a force applying device are all arranged on a substrate 1, and the wrench head of the standard torque wrench 3 is connected to the interface on the torque meter 2 to be tested; considering that the torque meter 2 to be tested and the standard torque wrench 3 are adapted and connected via an adapter square sleeve 4, a positioning portion that can slide up and down is provided on the force applying device, and then the wrench tail of the standard torque wrench 3 is placed on the positioning portion, and the baffle mechanism is made to slide through the loading structure, so that the wrench head of the standard torque wrench 3 rotates around the interface of the torque meter 2 to be tested, and the wrench tail slides with the baffle mechanism. During the entire verification process, the wrench head and the wrench tail of the standard torque wrench 3 are always located on the same horizontal line, effectively ensuring the verification accuracy; and the entire verification and calibration tool has a simple structure and is easy to install.

[0032] Please continue to see Figure 1 and Figure 2 , wherein the positioning portion includes a positioning ring 52, which is movably mounted on the blocking rod 51; the positioning ring 52 is provided with a radially penetrating internal threaded hole and a locking bolt is connected through the internal threaded hole. Tightening the locking bolt can make the locking bolt abut against the blocking rod 51 to fix the positioning ring 52.

[0033] In this way, the positioning ring 52 is adjusted up and down along the stop rod 51 so that the wrench tail and the wrench head of the standard torque wrench 3 are located on the same horizontal line, and then the locking bolt is tightened to fix the positioning ring 52 on the stop rod 51.

[0034] During implementation, in order to better place the tail of the standard torque wrench 3 on the positioning portion, it can be as follows Figure 1 and Figure 2 As shown in the figure, a horizontal positioning pin 53 is radially connected to the outer circumferential surface of the positioning ring 52, and the lever tail is placed on the positioning pin 53; the width of the positioning ring 52 can also be increased so that the upper surface of the positioning ring 52 forms a platform for placing the lever tail.

[0035] Among them, a sleeve 54 is movably mounted on the blocking rod 51 above the positioning ring 52, the inner diameter of the sleeve 54 is adapted to the diameter of the blocking rod 51, and the inner wall of the sleeve 54 is evenly distributed with a plurality of balls along the length direction of the sleeve 54 to enable rolling friction between the sleeve 54 and the blocking rod 51.

[0036] Because the tail of the standard torque wrench 3 is not fixed on the positioning ring 52 when the baffle mechanism slides on the loading mechanism, it will swing upward in the vertical direction to a certain extent. If the tail of the wrench directly contacts the baffle rod 51, there will be sliding friction between the two, which will affect the calibration accuracy. A sleeve 54 that can slide up and down along the baffle rod 51 is provided above the positioning ring 52, and a plurality of ball bearings are provided on the inner wall of the sleeve 54, so that there is rolling friction between the sleeve 54 and the baffle rod 51. The tail of the wrench is placed on the positioning ring 52 and contacts with the sleeve 54, so as to reduce the influence of friction when the tail of the wrench swings upward.

[0037] The loading mechanism includes a screw rod 62 and a guide rail 61 fixed on the base plate 1, baffles 63 are installed at both ends of the guide rail 61, and both ends of the screw rod 62 are installed on the baffles 63 on the corresponding side through bearings and are suspended above the guide rail 61;

[0038] The outer surface of the screw rod 62 is provided with an external thread, and a slide seat 64 is slidably connected to the guide rail 61. The end surface of the slide seat 64 parallel to the baffle 63 is vertically provided with an internal thread hole penetrating therethrough and is threadedly connected to the screw rod 62 through the internal thread hole;

[0039] The upper surface of the slide seat 64 is vertically provided with a mounting hole for mounting the blocking rod 51, and the lower surface of the slide seat 64 is vertically provided with a sliding groove adapted to the guide rail 61 along the length direction of the guide rail 61 so that the slide seat 64 is slidably connected to the guide rail 61.

[0040] One end of the screw rod 62 passes through the baffle 63 and is fixed with a rotating hand wheel 65;

[0041] The loading mechanism is also provided with a braking mechanism to lock the screw rod 62 when the slide 64 moves to a specified position to prevent the screw rod 62 from continuing to rotate.

[0042] In this way, the hand wheel 65 is turned to make the slide 64 slide forward and backward along the guide rail 61 to the calibrated calibration position, and the wrench tail placed on the positioning ring 52 also moves accordingly, thereby applying torque to the standard torque wrench 3; after sliding to the right position, the screw rod 62 is self-locked by the braking mechanism, and the calibration result is read to determine whether the torque meter 2 to be inspected needs to be calibrated. In order to strengthen the installation strength between the blocking rod 51 and the slide 64, a reinforcement sleeve can be set at the bottom of the blocking rod 51 at the installation position of the blocking rod 51 and the slide 64.

[0043] In this embodiment, the guide rails 61 are arranged in two intervals to ensure the smooth sliding of the slide seat 64 .

[0044] During implementation, the braking mechanism may be an integrated braking mechanism outside the screw rod 62, and the brake pads are quickly compressed to lock the screw rod 62; or a trapezoidal screw rod may be used to achieve self-locking, which are both existing technologies and will not be described in detail here.

[0045] Among them, a vertical mounting plate 71 is fixedly connected to the position of the base plate 1 corresponding to the mounting position of the torque meter 2 to be tested, and the mounting plate forms the mounting mechanism; the length direction of the mounting plate 71 is perpendicular to the sliding direction of the blocking rod mechanism; the torque meter 2 to be tested can be detachably mounted on the mounting plate 71 and can be adjusted in position along the length direction of the mounting plate 71;

[0046] A plurality of reinforcing ribs 72 are evenly spaced apart on both sides of the mounting plate 71 , and the lower surface of each reinforcing rib 72 is fixed to the base plate 1 .

[0047] In this way, the torque meter 2 to be tested can be reliably installed and fixed to the verification and calibration tooling.

[0048] During implementation, the length of the mounting plate 71 and the distance between the mounting plate 71 and the guide rail 61 should be appropriate, and the torque meter 2 to be tested should be slid left and right along the mounting plate 71 to ensure that the force application point of the standard torque wrench 3 can be located at the specified position of the force arm, thereby reducing the measurement uncertainty and error caused by the different lengths of the force arm.

[0049] In this embodiment, the torque meter 2 to be tested is a portable torque meter with a rated range of 10 N·m. Figure 2 As shown, the front part has a detachable structure. The bolts and nuts at the front part are directly removed, and then the portable torque meter is placed on the mounting plate 71, and then the bolts and nuts are installed.

[0050] The standard torque wrench 3 is connected to a measuring and display instrument device 8 via a sensor 81 .

[0051] During implementation, the adapter sleeve 4 is connected to the interface of the torque meter 2 to be tested, and then the sensor 81 is connected to the upper end of the adapter sleeve 4, and finally the wrench head of the standard torque wrench 3 is adapted and connected to the upper end of the adapter sleeve 4.

[0052] During measurement, the slide 64 is located at different positions along the guide rail 61, so that different torques are applied to the standard torque wrench 3, and the reading on the torque meter 2 to be tested is compared with the reading on the measuring display instrument device 8. Since the accuracy level of the standard torque wrench is 0.1 or above, and the accuracy level of the torque meter is 0.3 or above, as long as the difference between the two readings is within a reasonable error range, it is determined that the torque meter 2 to be tested does not need to be calibrated, otherwise it needs to be calibrated.

[0053] Wherein, handles 9 are respectively installed on both sides of the upper surface of the base plate 1 in the length direction.

[0054] In this way, it is convenient to move the entire verification and calibration tooling.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A torque meter calibration tool, comprising a horizontal base plate; characterized in that: A mounting mechanism is provided on one side of the base plate, and the mounting mechanism is used to install and fix the torque meter to be tested; a force-applying device is provided on the other side of the base plate, and a standard torque wrench is provided between the force-applying device and the mounting mechanism, and the wrench head of the standard torque wrench is adaptably connected to the adapter square sleeve on the interface of the torque meter to be tested, and the wrench tail is connected to the force-applying device so as to apply torque to the standard torque wrench through the force-applying device; the force-applying device includes a loading mechanism and a baffle mechanism, and the baffle mechanism is slidably connected to the loading mechanism, and the baffle mechanism includes a vertical baffle, and a positioning portion for placing the wrench tail is detachably connected to the baffle, and the positioning portion can slide up and down along the baffle so that the wrench head and the wrench tail of the standard torque wrench are located on the same horizontal line.

2. According to claim 1, a torque meter calibration tool is characterized by: The positioning part includes a positioning ring, which is movably sleeved on the blocking rod; a radially penetrating internal threaded hole is opened on the positioning ring and a locking bolt is connected through the internal threaded hole. Tightening the locking bolt can make the locking bolt abut against the blocking rod to fix the positioning ring.

3. A torque meter calibration tool according to claim 2, characterized in that: A sleeve is movably mounted on the stop rod above the positioning ring, the inner diameter of the sleeve matches the diameter of the stop rod, and a plurality of balls are evenly distributed on the inner wall of the sleeve along the length direction of the sleeve to enable rolling friction between the sleeve and the stop rod.

4. The torque meter calibration tool according to claim 1, characterized in that: The loading mechanism includes a screw rod and a guide rail fixed on a base plate, baffles are installed at both ends of the guide rail, and both ends of the screw rod are installed on the baffles on the corresponding sides through bearings and are suspended above the guide rail; The outer surface of the screw rod is provided with an external thread, and a sliding seat is slidably connected to the guide rail. The end surface of the sliding seat parallel to the baffle is vertically provided with a penetrating internal thread hole and is threadedly connected to the screw rod through the internal thread hole; The upper surface of the slide seat is vertically provided with a mounting hole for mounting the blocking rod, and the lower surface of the slide seat is vertically provided with a sliding groove adapted to the guide rail along the length direction of the guide rail so that the slide seat and the guide rail are slidably connected. One end of the screw rod passes through the baffle and is fixed with a rotating hand wheel; The loading mechanism is also provided with a braking mechanism to lock the screw rod when the slide moves to a specified position to prevent the screw rod from continuing to rotate.

5. The verification and calibration tool for a torque meter according to claim 1, characterized in that: A vertical mounting plate is fixedly connected to the base plate at a position corresponding to the position where the torque meter to be tested is installed, and the mounting plate forms the mounting mechanism; The length direction of the mounting plate is perpendicular to the sliding direction of the blocking rod mechanism; the torque meter to be tested can be detachably mounted on the mounting plate and can be adjusted in position along the length direction of the mounting plate; A plurality of reinforcing ribs are evenly spaced on both sides of the mounting plate, and the lower surface of each reinforcing rib is fixed to the base plate.

6. A torque meter calibration tool according to any one of claims 1 to 5, characterized in that: The standard torque wrench is connected to a measuring and display instrument device via a sensor.

7. A torque meter calibration tool according to any one of claims 1 to 5, characterized in that: Handles are respectively installed on both sides of the upper surface of the base plate in the length direction.

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