A torque plate calibration bench
By introducing a detachable bearing cylinder and an arc-shaped clamping ring into the torque plate calibration bench, the problem of insufficient adjustability of the bearing is solved, enabling high-precision calibration of torque plates of different shapes and sizes, expanding the applicability of the calibration bench and improving measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HAOBO MEASUREMENT CALIBRATION CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-06-30
AI Technical Summary
The existing load-bearing device lacks adjustability when fixing the torque wrench under test, and cannot adapt to torque wrenches of different shapes and sizes, thus limiting the applicability of the calibration table.
A torque plate calibration bench was designed, which adopts a detachable bearing cylinder and an arc-shaped clamping ring. The radial positioning and coaxial fixation of torque plates of different diameters are achieved by adjusting the screw and the U-shaped positioning plate. The torque is calibrated by combining a high-precision torque sensor and a servo motor.
It enables effective fixing and high-precision calibration of torque wrenches of different lengths and diameters, expands the applicability of the calibration table, ensures that the torque sensor and the wrench under test are coaxially positioned, and improves the accuracy and reliability of the measurement.
Smart Images
Figure CN224435655U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of torque plate calibration technology, specifically a torque plate calibration bench. Background Technology
[0002] A torque wrench calibration bench is a high-precision metrological device used for the verification, calibration, and testing of various torque tools (such as torque wrenches, screwdrivers, and electric / pneumatic torque tools). The torque wrench calibration bench includes a force loading system, a high-precision torque sensor, a signal acquisition and processing system, a mechanical structure, and a computer and software system.
[0003] Its operating principle is as follows: The user initiates the command, and the operator selects parameters such as the type of board to be tested, range, calibration point, and loading speed on the computer and software system, and clicks "Start".
[0004] The computer and software system issues an order, and the body executes it (instruction and execution). After receiving the start instruction, the computer and software system immediately sends a precise command to the force loading system (arm): "Smoothly load the corresponding torque value at a speed of X Newton-meters per second."
[0005] The servo driver in the force loading system drives the motor to start rotating.
[0006] The rotational torque generated by the motor is transmitted through mechanical structures, such as couplings and drive shafts.
[0007] The nerve senses and uploads signals (signal acquisition). During the transmission of torque, it must pass through a high-precision torque sensor (nerve endings).
[0008] The strain gauge inside the sensor deforms under stress, generating an extremely weak electrical signal proportional to the applied torque. This weak signal is immediately captured by the signal acquisition and processing system (nervous system). The system amplifies and filters (removes interference) the signal, converting it from an analog signal into a high-precision digital signal.
[0009] The brain makes decisions and controls (real-time processing and feedback), and the converted digital signals are transmitted back to the computer and software system in real time.
[0010] The "brain" compares the real-time collected torque value with the target value of its initial command, and continuously adjusts the instructions sent to the force loading system through a closed-loop control algorithm to ensure that the loading process smoothly and accurately reaches the target point and remains stable. This process is carried out continuously at the millisecond level.
[0011] Meanwhile, the software plots real-time data into curves to display to the user, making judgments and reports (results output). Once loading is complete and the data has stabilized, the "brain" will record the sensor's final peak value (for preset wrenches) or stable value (for indicator wrenches).
[0012] The software automatically calculates indicators such as error and repeatability, and judges whether it is qualified based on the built-in procedures.
[0013] The high-precision torque sensor is the "heart" of the calibration bench, and its position directly determines the accuracy and reliability of the measurement. Its core installation principle is to be the only and direct measurement link in the torque transmission path. One end of the high-precision torque sensor is connected to the output shaft of the drive source (servo motor) via a high-rigidity, backlash-free coupling, while the other end is connected to the carrier via a special clamp. This carrier is used to clamp the torque wrench being tested.
[0014] The existing load-bearing device lacks adjustability when fixing the torque wrench under test. That is, it cannot be adapted to the diameter of different shaped torque wrenches under test, resulting in a limited range of torque wrenches that each set of calibration benches can test.
[0015] To address this, this technical solution designs a new torque plate calibration bench. Utility Model Content
[0016] The purpose of this invention is to provide a torque plate calibration bench to solve the problems mentioned in the background art.
[0017] To achieve the above objectives, this utility model provides the following technical solution:
[0018] A torque plate calibration bench includes two sets of side-mounted fixing plates symmetrically installed on both sides of the top of the bench. Two sets of parallel sliding rods are installed between the two side-mounted fixing plates. A calibration plate is slidably mounted on the sliding rods. A sensor compartment is opened in the middle of the calibration plate. A bottom ring seat is slidably mounted on the calibration plate perpendicular to the direction of the sliding rods. Two sets of U-shaped positioning plates are symmetrically connected on both sides of the bottom ring seat. The U-shaped positioning plates are sleeved on the side wall of the calibration plate and slide along the calibration plate. A positioning element is provided in the middle of the vertical side wall of the U-shaped positioning plate to limit the movement of the U-shaped positioning plate. Multiple sets of bearing cylinders are detachably installed on the upper side of the bottom ring seat. The bearing cylinders after longitudinal installation form a cylindrical structure to position the torque plate to be calibrated. The number of bearing cylinders is determined according to the length of the torque plate to be calibrated.
[0019] The bearing cylinder is equipped with clamping components that move radially and symmetrically on both sides. The clamping components radially clamp the torque plate to be measured located inside the bearing cylinder. That is, when facing torque plates of different sizes and shapes, the clamping components can be radially positioned according to the diameter of different positions, thereby ensuring that the torque plate to be measured is fully fixed. When positioning the torque plate to be measured, its bottom detection end extends to the inside of the bottom ring seat.
[0020] The sensor compartment contains a set of high-precision torque sensors. The bottom of the high-precision torque sensors is connected to a servo motor fixed inside the sensor compartment via a high-rigidity, gapless coupling. The top of the high-precision torque sensors is connected to the detection end of the torque plate to be measured, which is located inside the bottom ring seat, via a special clamp. During testing, the bottom of the torque plate to be measured is moved to the top of the high-precision torque sensor by moving the U-shaped positioning plate, so that they are coaxially distributed. Then, the top of the high-precision torque sensor is connected and fixed to the bottom of the torque plate to be measured using a special clamp. Then, under the operation of the servo motor, the high-precision torque sensor is driven to rotate the torque plate to be measured, and the calibration is performed at different range stages.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] The detachable bearing sleeve assembly supports the calibration of torque wrenches of different lengths.
[0023] The arc-shaped clamping ring moves radially via the adjusting screw to adapt to the torque wrench of different diameters.
[0024] The U-shaped positioning plate slides along the test plate and is quickly locked in place by the fastening screw, ensuring that the high-precision torque sensor is coaxial with the test plate. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of a torque plate calibration bench.
[0026] Figure 2 This is a top view schematic diagram of a torque plate calibration stand.
[0027] Figure 3 This is a partial three-dimensional structural diagram of a torque plate calibration bench.
[0028] Figure 4 This is a schematic diagram of a special fixture for a torque plate calibration bench.
[0029] Figure 5 for Figure 2 A magnified structural diagram of A in the diagram.
[0030] Figure 6 for Figure 3 A magnified structural diagram of B in the diagram.
[0031] The components include: machine base 10, slide bar 11, side-mounted fixing plate 12, calibration plate 13, sensor compartment 14, servo motor 15, high-precision torque sensor 16, bottom ring seat 17, U-shaped positioning plate 18, semi-circular clamping ring 19, fastening bolt 20, bearing cylinder 21, clamping hole 22, clamping pin 23, arc-shaped clamping ring 24, adjusting screw 25, rotating handle 26, T-shaped rotating block 27, T-shaped rotating hole 28, fastening screw 29, and nut 30. Detailed Implementation
[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0036] Please see Figures 1-6A torque plate calibration bench includes a machine base 10 with two sets of side-mounted fixing plates 12 symmetrically installed on both sides of the top. Two sets of parallel sliding rods 11 are installed between the two side-mounted fixing plates 12. A calibration plate 13 is slidably mounted on the sliding rods 11. A sensor compartment 14 is opened in the middle of the calibration plate 13. A bottom ring seat 17 is slidably mounted on the calibration plate 13 perpendicular to the sliding rods 11. Two sets of U-shaped positioning plates 18 are symmetrically connected on both sides of the bottom ring seat 17. The U-shaped positioning plates 18 are sleeved on the side wall of the calibration plate 13 and slide along the calibration plate 13. A positioning element is provided in the middle of the vertical side wall of the U-shaped positioning plate 18 to limit the movement of the U-shaped positioning plate 18. Multiple sets of bearing cylinders 21 are sequentially detachably installed on the upper side of the bottom ring seat 17. The longitudinally installed bearing cylinders 21 form a cylindrical structure to position the torque plate to be calibrated. The number of bearing cylinders 21 is determined according to the length of the torque plate to be calibrated.
[0037] The bearing cylinder 21 is equipped with clamping members that move radially and symmetrically on both sides inside. The clamping members radially clamp the part of the torque plate to be measured located inside the bearing cylinder 21. That is, when facing torque plates of different sizes and shapes, the clamping members can be radially positioned according to the diameter of different positions, thereby ensuring that the torque plate to be measured is fully fixed. When positioning the torque plate to be measured, its bottom detection end extends to the inside of the bottom ring seat 17.
[0038] A set of high-precision torque sensors 16 is installed inside the sensor compartment 14. The bottom end of the high-precision torque sensor 16 is connected to a servo motor 15 fixed inside the sensor compartment 14 through a high-rigidity, gapless coupling. The top end of the high-precision torque sensor 16 is connected to the detection end of the torque plate to be measured, which is set inside the bottom ring seat 17, through a special clamp. During the test, the bottom end of the torque plate to be measured is moved to the top end of the high-precision torque sensor 16 by moving the U-shaped positioning plate 18, so that they are coaxially distributed. Then, the top end of the high-precision torque sensor 16 is connected and fixed to the bottom end of the torque plate to be measured by using a special clamp. Then, under the operation of the servo motor 15, the high-precision torque sensor 16 is driven to rotate the torque plate to be measured, and the calibration is performed at different range stages.
[0039] In one embodiment of the present invention, the positioning component includes a fastening screw 29 threadedly connected to the vertical side wall of the U-shaped positioning plate 18. A nut 30 is threadedly connected to the fastening screw 29. Rotating the fastening screw 29 adjusts the contact force between its inner end and the outer wall of the calibration plate 13. Then, in conjunction with the shape of the U-shaped positioning plate 18 and the fitting distribution of the outer wall of the calibration plate 13, that is, when the high-precision torque sensor 16 drives the detection end of the measured torque plate to rotate, the position of the cylindrical structure and the like can be limited.
[0040] A dedicated clamp is a mechanical device on a torque wrench calibration bench used to quickly, accurately, and reliably clamp the torque wrench under test. Its core function is not to provide torque, but to ensure that the wrench under test and the core sensor of the calibration bench are perfectly coaxial and can safely withstand enormous reaction forces. It comes in various types. For example, a clamping structure consisting of two sets of semi-circular clamping rings 19 connected and fixed by fastening bolts 20 can be used. This involves placing the top of the high-precision torque sensor 16 and the detection end of the torque wrench under test simultaneously inside the bottom ring seat 17, and then clamping and fixing them using the semi-circular clamping rings 19. This technical solution only describes one structural form of the dedicated clamp; its specific type depends on the type of the high-precision torque sensor 16 and the detection end of the torque wrench under test, which will not be elaborated upon or limited here.
[0041] In a preferred embodiment of the present invention, the clamping member includes an arc-shaped clamping ring 24 disposed inside the bearing cylinder 21. An adjusting screw 25 is rotatably connected to the center of the back of the arc-shaped clamping ring 24. The adjusting screw 25 extends through the cylinder wall of the bearing cylinder 21 to the outside and is equipped with a handle 26. By rotating the handle 26, the adjusting screw 25 is controlled to move radially, and then the radial position of the arc-shaped clamping ring 24 is adjusted, thereby clamping and fixing the portion of the torque plate to be measured placed inside the bearing cylinder 21.
[0042] A connecting rod is installed at the inner end of the adjusting screw 25, and a T-shaped rotating block 27 is installed at the end of the connecting rod. A T-shaped rotating hole 28 is opened in the inner wall of the arc-shaped clamping ring 24 corresponding to the T-shaped rotating block 27. The T-shaped rotating block 27 is rotatably connected in the T-shaped rotating hole 28, that is, the two are kept in a rotating connection to prevent them from disengaging.
[0043] Specifically, the side of the arc-shaped clamping ring 24 that contacts the plate being measured is striped to increase the friction between the ring and the plate, thereby increasing the positioning strength.
[0044] In a preferred embodiment of the present invention, multiple sets of locking holes 22 and locking pins 23 are evenly arranged between adjacent bearing cylinders 21 and between the bearing cylinder 21 and the bottom ring seat 17, that is, by using the locking holes 22 and locking pins 23 to lock together, a detachable connection is realized between the bearing cylinders 21 and between the bearing cylinder 21 and the bottom ring seat 17.
[0045] The working principle of this utility model is as follows: In the idle position of this device, all the aforementioned driving components (representing power elements, electrical devices, and compatible power supplies) are connected via wires. The electrical connections are completed in sequence between the working components. The detailed connection methods are well-known in the field. The following mainly describes the working principle and process, without further explanation of the electrical control.
[0046] Loading the torque wrench to be tested: Assemble the number of bearing cylinders 21 according to the length of the wrench, connect the bearing cylinder 21 and the bottom ring seat 17 through the locking pin 23 and the locking hole 22, place the torque wrench to be tested inside the bearing cylinder 21, and extend the bottom detection end to the inside of the bottom ring seat 17;
[0047] Rotate the handle 26 on each bearing cylinder 21 to drive the adjusting screw 25 to push the arc-shaped clamping ring 24 to move radially and clamp different diameter parts of the wrench.
[0048] Coaxial positioning and connection: The sliding U-shaped positioning plate 18 drives the bottom ring seat 17 to move, so that the detection end of the wrench is coaxial with the top of the high-precision torque sensor 16. The position of the U-shaped positioning plate 18 is fixed by tightening the fastening screw 29. The sensor 16 and the wrench under test are connected by two sets of semi-circular clamping rings 19 and fastening bolts 20.
[0049] Torque verification: Servo motor 15 drives high-precision torque sensor 16 to rotate, transmitting torque to the tested board. High-precision torque sensor 16 collects data and transmits it to the computer system to calculate error and repeatability indicators.
[0050] It should be understood that in this application, all rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slippage or wear, and each part is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that all parts in this application are made of metal or plastic materials with suitable strength in the relevant field to ensure that their structural rigidity meets the actual requirements.
[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A torque board sub-calibration station, characterized by, The machine includes a machine base (10), side-mounted fixing plates (12) symmetrically installed on both sides of the top of the machine base (10), two sets of sliding rods (11) installed between the two side-mounted fixing plates (12), and a calibration plate (13) slidably mounted on the sliding rods (11); characterized in that, The calibration plate (13) has a sensor compartment (14) in the middle, and a bottom ring seat (17) is slidably provided on the calibration plate (13) in a direction perpendicular to the slide rod (11). The bottom ring seat (17) is symmetrically connected to two sets of U-shaped positioning plates (18) on both sides. The U-shaped positioning plates (18) are sleeved on the side wall of the calibration plate (13) and slide along it. The U-shaped positioning plate (18) has a positioning element in the middle of its vertical side wall; Multiple sets of bearing cylinders (21) are sequentially disassembled and installed on the upper side of the bottom ring seat (17), and the longitudinally combined bearing cylinders (21) form a cylindrical structure; The bearing cylinder (21) has radially movable clamping members symmetrically arranged on both sides inside; The sensor compartment (14) is equipped with a high-precision torque sensor (16), the bottom of which is connected to a servo motor (15) via a coupling, and the top of which is connected to the detection end of the torque wrench to be measured via a special clamp.
2. The torque plate calibration bench according to claim 1, characterized in that, The positioning component includes a fastening screw (29) threaded onto the vertical side wall of the U-shaped positioning plate (18), and a nut (30) threaded onto the fastening screw (29).
3. The torque plate calibration bench according to claim 1, characterized in that, The clamping component includes an arc-shaped clamping ring (24) inside the bearing cylinder (21), and an adjusting screw (25) is rotatably connected to the center of the back of the arc-shaped clamping ring (24). The adjusting screw (25) is threaded through the cylinder wall of the bearing cylinder (21) and extends to the outside, with a rotating handle (26) installed at the end.
4. The torque plate calibration bench according to claim 3, characterized in that, The adjusting screw (25) has a connecting rod installed at its inner end, and a T-shaped rotating block (27) is provided at the end of the connecting rod. A T-shaped rotating hole (28) is opened on the inner wall of the arc-shaped clamping ring (24), and the T-shaped rotating block (27) is rotatably connected to the T-shaped rotating hole (28).
5. The torque plate calibration bench according to claim 3 or 4, characterized in that, The side of the arc-shaped clamping ring (24) that contacts the torque wrench being measured is striped.
6. The torque plate calibration bench according to claim 1, characterized in that: Multiple sets of locking holes (22) and locking pins (23) are provided between adjacent bearing cylinders (21) and between bearing cylinder (21) and bottom ring seat (17), respectively, and detachable connection is achieved by locking pins (23) and locking holes (22).
7. The torque plate calibration bench according to claim 1, characterized in that: The special clamp includes two sets of semi-circular clamping rings (19) fixed by fastening bolts (20).