Small torque measuring device with adjustable arm length

Abstract

The utility model discloses an arm length adjustable type small torque measuring device, which comprises a measuring lantern ring and torque measuring units which are symmetrically arranged at two ends of the measuring lantern ring and can move along the length direction of the measuring lantern ring, and the measuring lantern ring is connected with the torque measuring units through locking pieces. A clamping hole is formed in the middle of the measuring lantern ring, and a four-claw self-centering chuck is arranged in the clamping hole. According to the utility model, through the arrangement of the measuring lantern ring, the measuring device can be directly sleeved on a torsion shaft, the measuring device can be connected with a torsion system to be measured without disassembly, and the requirements of in-situ measurement or system measurement on the torsion system are met; and meanwhile, the four-jaw self-centering chuck is connected with the torsion shaft, so that the displacement of the measuring device in the measuring process is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment measurement, in particular to an adjustable arm length type small torque measuring device. Background Art

[0002] Torque parameters are important parameters for measuring the physical characteristics of torsion machinery and equipment. Whether it is a single torsion machinery and equipment or various torsion systems, the torque parameters need to be measured and the equipment is calibrated through the measured values. Relatively speaking, the method of measuring the torque parameters of a single torsion machinery and equipment is relatively simple. The torsion machinery and equipment can be connected to the standard device through various connecting tools to complete the torque parameter measurement. However, with the continuous improvement and development of torsion machinery and equipment towards integration, complexity, and multifunctionality, it has become increasingly difficult to obtain torque parameters. The previous measurement method of disassembling the torque sensor or torque meter separately and sending it for inspection cannot meet the needs of in-situ measurement and system measurement of the torsion system; and in the process of disassembly and re-measurement, many torque sensors and torque meters in the torsion system are difficult to disassemble, and in-situ measurement and system measurement cannot be performed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an adjustable arm length small torque measuring device in view of the deficiencies in the above-mentioned prior art. By setting a measuring collar, the measuring device can be directly mounted on the torsion shaft, and the measuring device can be connected to the torsion system to be measured without disassembly, thereby meeting the needs of in-situ measurement or system measurement of the torsion system. At the same time, a four-jaw self-centering chuck is connected to the torsion shaft to prevent the measuring device from shifting during the measurement process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an adjustable arm length small torque measuring device, characterized in that it comprises a measuring collar and a torque measuring unit symmetrically arranged at both ends of the measuring collar and movable along the length direction of the measuring collar, and the measuring collar and the torque measuring unit are connected by a locking member;

[0005] A clamping hole is provided in the middle of the measuring collar, a four-jaw self-centering chuck is provided in the clamping hole, and the center of the four-jaw self-centering chuck coincides with the center of the measuring collar; openings are provided at both ends of the measuring collar, the end of the torque measuring unit is inserted into the opening, the torque measuring unit and the opening are slidably connected, and the locking member is connected between the end of the torque measuring unit inserted in the opening and the measuring collar;

[0006] The torque measuring unit comprises an adjustable lever arm horizontally inserted in the opening and an adjustable weight assembly arranged on the adjustable lever arm. The opening and the adjustable lever arm are slidably connected, and the adjustable weight assembly is arranged at one end of the adjustable lever arm away from the measuring collar.

[0007] The above-mentioned adjustable arm length small torque measuring device is characterized in that: the four-jaw self-centering chuck includes a chuck fixedly arranged in the clamping hole, four clamping blocks each arranged on the chuck, and an adjusting member arranged on the chuck and cooperating with the chuck; the chuck and the adjusting member are connected by gear transmission.

[0008] The above-mentioned adjustable arm length small torque measuring device is characterized in that: the center of the chuck coincides with the center of the clamping hole, a bevel tooth is provided on one side of the chuck, and a spiral groove is provided on the other side of the chuck; the clamping block is arranged on the side of the chuck where the spiral groove is provided, and a clamping block cooperating with the spiral groove is provided at the bottom of the clamping block.

[0009] The above-mentioned adjustable arm length small torque measuring device is characterized in that the adjusting member includes an adjusting bevel gear matched with the bevel teeth on the chuck and an adjusting rod arranged at the center of the adjusting bevel gear.

[0010] The above-mentioned adjustable arm length small torque measuring device is characterized in that: the adjustable weight assembly includes an adjusting screw vertically inserted into the adjustable force arm, the central axis of the adjusting screw is perpendicular to the central axis of the adjustable force arm, and the adjusting screw and the adjustable force arm are connected by a thread; the top end of the adjusting screw extends to the top of the adjustable force arm, and a rotating handle is provided at the top of the adjusting screw, the bottom end of the adjusting screw extends to the bottom of the adjustable force arm, and a weight plate is horizontally provided at the bottom end of the adjusting screw.

[0011] The above-mentioned adjustable arm length small torque measuring device is characterized in that: a through hole for installing the adjusting screw is opened on the adjustable force arm, and a length scale bar is set on the adjustable force arm, and the zero scale of the length scale bar is located on the side of the through hole close to the measuring ring.

[0012] The above-mentioned adjustable arm length small torque measuring device is characterized in that: a slide groove is arranged in the opening, and the slide groove is arranged along the extension direction of the opening; a slide rail cooperating with the slide groove is arranged on the adjustable force arm, and the slide rail is arranged along the extension direction of the adjustable force arm.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model provides a measuring collar, so that the measuring device can be directly mounted on the torsion shaft, and the measuring device can be connected to the torsion system to be measured without disassembly, thereby meeting the requirements of in-situ measurement or system measurement of the torsion system; at the same time, a four-jaw self-centering chuck is connected to the torsion shaft to prevent the measuring device from shifting during the measurement process.

[0015] 2. The utility model can measure torque by providing an adjustable lever arm and an adjustable weight assembly, and because the extension length of the adjustable lever arm and the upper and lower positions of the adjusting screw in the adjustable weight assembly can be adjusted, the measuring device can better adapt to the internal space of the torsion system and is not limited by the internal space.

[0016] In summary, the utility model can directly mount the measuring device on the torsion shaft through the measuring collar, and the measuring device can be connected to the torsion system to be measured without disassembly, thereby meeting the needs of in-situ measurement or system measurement of the torsion system; at the same time, the four-jaw self-centering chuck is connected to the torsion shaft to prevent the measuring device from shifting during the measurement process.

[0017] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the four-jaw self-centering chuck of the utility model.

[0020] Description of reference numerals:

[0021] 1—measuring collar; 2—locking piece; 3—clamping hole;

[0022] 4—Adjustable lever arm; 5—Adjusting screw; 6—Rotating handle;

[0023] 7—weight plate; 8—chuck; 9—clamp block;

[0024] 10—adjusting part; 11—adjusting rod. DETAILED DESCRIPTION

[0025] like Figure 1 and Figure 2 As shown, the utility model comprises a measuring collar 1 and a torque measuring unit symmetrically arranged at both ends of the measuring collar 1 and movable along the length direction of the measuring collar 1, and the measuring collar 1 and the torque measuring unit are connected by a locking member 2;

[0026] A clamping hole 3 is provided in the middle of the measuring collar 1, and a four-jaw self-centering chuck is provided in the clamping hole 3, and the center of the four-jaw self-centering chuck coincides with the center of the measuring collar 1; both ends of the measuring collar 1 are provided with openings, and the end of the torque measuring unit is inserted into the opening, and the torque measuring unit and the opening are slidably connected, and the locking member 2 is connected between the end of the torque measuring unit inserted in the opening and the measuring collar 1;

[0027] The torque measuring unit includes an adjustable lever arm 4 horizontally inserted into the opening and an adjustable weight assembly arranged on the adjustable lever arm 4. The opening and the adjustable lever arm 4 are slidably connected, and the adjustable weight assembly is arranged at one end of the adjustable lever arm 4 away from the measuring collar 1.

[0028] It should be noted that when using this measuring device, it is also necessary to use it together with a standard weight, and the torque value can be obtained by adjusting the extension length of the lever arm 4 and the weight of the weight on the weight plate 7. In particular, when using this measuring device to measure torque, it is only necessary to measure on the torque measuring unit on one side each time. The torque measuring units on both sides are set to measure both forward and reverse torques.

[0029] By setting the measuring collar 1, the measuring device can be directly mounted on the torsion shaft, and the measuring device and the torsion system to be measured can be connected without disassembly, thereby meeting the needs of in-situ measurement or system measurement of the torsion system; at the same time, a four-jaw self-centering chuck is used to connect the torsion shaft to prevent the measuring device from shifting during the measurement process.

[0030] In addition, by setting up an adjustable lever arm 4 and an adjustable weight assembly, torque can be measured, and since the extension length of the adjustable lever arm 4 and the upper and lower positions of the adjusting screw 5 in the adjustable weight assembly can be adjusted, the measuring device can better adapt to the internal space of the torsion system and is not limited by the internal space.

[0031] like Figure 2 As shown, in this embodiment, the four-jaw self-centering chuck includes a chuck 8 fixedly arranged in the clamping hole 3, four clamping blocks 9 each arranged on the chuck 8, and an adjusting member 10 arranged on the chuck 8 and cooperating with the chuck 8; the chuck 8 and the adjusting member 10 are connected by gear transmission.

[0032] In this embodiment, the center of the chuck 8 coincides with the center of the clamping hole 3, a bevel tooth is provided on one side of the chuck 8, and a spiral groove is provided on the other side of the chuck 8; the clamping block 9 is arranged on the side of the chuck 8 where the spiral groove is provided, and a clamping block that cooperates with the spiral groove is provided at the bottom of the clamping block 9.

[0033] In this embodiment, the adjusting member 10 includes an adjusting bevel gear matched with the bevel teeth on the chuck 8 and an adjusting rod 11 arranged at the center of the adjusting bevel gear.

[0034] In actual use, the four-jaw self-centering chuck is a chuck in which the clamping block 9 can move radially and concentrically to automatically center the workpiece, and is widely used in actual processing. The four-jaw self-centering chuck has the functions of automatic clamping, automatic centering and automatic positioning. It can automatically adjust the clamping force according to the shape and size of the torque sensor or the torsion shaft, and accurately position the measuring device at the center position to improve the accuracy of small torque measurement. Among them, the clamping block 9 is a replaceable clamping block, which can be replaced according to the shape of the torque sensor or the torsion shaft, and has stronger applicability. The measuring device is fixed by adjusting the adjusting bevel gear clockwise, and the measuring device is loosened by adjusting the adjusting bevel gear counterclockwise. In actual use, the motor and the adjusting rod 11 can be connected to drive the adjusting rod 11 to move, thereby driving the adjusting bevel gear to rotate.

[0035] like Figure 1 As shown, in this embodiment, the adjustable weight assembly includes an adjusting screw 5 vertically inserted into the adjustable lever arm 4, the central axis of the adjusting screw 5 is perpendicular to the central axis of the adjustable lever arm 4, and the adjusting screw 5 and the adjustable lever arm 4 are connected by a thread; the top end of the adjusting screw 5 extends to the top of the adjustable lever arm 4, and a rotating handle 6 is provided at the top of the adjusting screw 5, the bottom end of the adjusting screw 5 extends to the bottom of the adjustable lever arm 4, and a weight plate 7 is horizontally provided at the bottom end of the adjusting screw 5.

[0036] In this embodiment, the adjustable arm 4 is provided with a through hole for installing the adjusting screw 5 , and the adjustable arm 4 is provided with a length scale bar, and the zero scale of the length scale bar is located on the side of the through hole close to the measuring collar 1 .

[0037] In this embodiment, a slide groove is provided in the opening, and the slide groove is arranged along the extension direction of the opening; a slide rail cooperating with the slide groove is provided on the adjustable force arm 4, and the slide rail is arranged along the extension direction of the adjustable force arm 4.

[0038] When the utility model is used, it is first necessary to put the measuring collar 1 of the measuring device body on the torque sensor or the torsion shaft of the torque measuring instrument in the torsion system, and use the adjusting rod 11 to drive the adjusting bevel gear to rotate clockwise, so that the clamping block 9 installed on the chuck 8 moves along the radial direction of the chuck 8, so that the clamping block 9 clamps the torque sensor or the torsion shaft; then adjust the extension length of the adjustable force arm 4 according to the range of the left and right space in the torsion system, and use the locking piece 2 to connect the adjusted adjustable force arm 4 and the measuring collar 1, and confirm the length of the adjustable force arm 4 through the length scale bar on the adjustable force arm 4. Effective extension length; finally, according to the internal space of the torsion system, turn the rotating handle 6 to adjust the distance between the weight plate 7 and the bottom of the adjustable lever arm 4. After adjusting to the appropriate position, place the standard weight on the weight plate 7. The torque value applied to the torsion shaft of the torque sensor or torque measuring instrument in the torsion system is obtained by the weight of the standard weight and the length of the adjustable lever arm 4. By comparing it with the torque value displayed on the torsion shaft of the torque sensor or torque measuring instrument in the torsion system, the purpose of measuring the torque sensor or torque measuring instrument in the torsion system is achieved, which is convenient for subsequent calibration.

[0039] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An adjustable arm length small torque measuring device, characterized in that: It comprises a measuring collar (1) and a torque measuring unit symmetrically arranged at two ends of the measuring collar (1) and movable along the length direction of the measuring collar (1), wherein the measuring collar (1) and the torque measuring unit are connected via a locking member (2); A clamping hole (3) is provided in the middle of the measuring collar (1), a four-jaw self-centering chuck is provided in the clamping hole (3), and the center of the four-jaw self-centering chuck coincides with the center of the measuring collar (1); both ends of the measuring collar (1) are provided with openings, the end of the torque measuring unit is inserted into the opening, the torque measuring unit and the opening are slidably connected, and the locking member (2) is connected between the end of the torque measuring unit inserted into the opening and the measuring collar (1); The torque measuring unit comprises an adjustable force arm (4) horizontally inserted into the opening and an adjustable weight assembly arranged on the adjustable force arm (4); the opening and the adjustable force arm (4) are slidably connected, and the adjustable weight assembly is arranged at one end of the adjustable force arm (4) away from the measuring collar (1).

2. The adjustable arm length small torque measuring device according to claim 1, characterized in that: The four-jaw self-centering chuck comprises a chuck (8) fixedly arranged in the clamping hole (3), four clamping blocks (9) each arranged on the chuck (8), and an adjusting member (10) arranged on the chuck (8) and cooperating with the chuck (8); the chuck (8) and the adjusting member (10) are connected by a gear transmission.

3. The adjustable arm length small torque measuring device according to claim 2, characterized in that: The center of the chuck (8) coincides with the center of the clamping hole (3); a bevel tooth is provided on one side of the chuck (8); and a spiral groove is provided on the other side of the chuck (8); the clamping block (9) is arranged on the side of the chuck (8) on which the spiral groove is provided, and a clamping block cooperating with the spiral groove is provided at the bottom of the clamping block (9).

4. The adjustable arm length small torque measuring device according to claim 3, characterized in that: The adjusting member (10) comprises an adjusting bevel gear that cooperates with the bevel teeth on the chuck (8) and an adjusting rod (11) arranged at the center of the adjusting bevel gear.

5. The adjustable arm length small torque measuring device according to claim 1, characterized in that: The adjustable weight assembly comprises an adjusting screw (5) vertically inserted into the adjustable lever (4), the central axis of the adjusting screw (5) being perpendicular to the central axis of the adjustable lever (4), and the adjusting screw (5) and the adjustable lever (4) being connected via a thread; the top end of the adjusting screw (5) extending to above the adjustable lever (4), and a rotating handle (6) being arranged at the top end of the adjusting screw (5), the bottom end of the adjusting screw (5) extending to below the adjustable lever (4), and a weight plate (7) being arranged horizontally at the bottom end of the adjusting screw (5).

6. The adjustable arm length small torque measuring device according to claim 5, characterized in that: The adjustable force arm (4) is provided with a through hole for mounting the adjusting screw (5), and the adjustable force arm (4) is provided with a length scale bar, wherein the zero scale of the length scale bar is located on a side of the through hole close to the measuring collar (1).

7. The adjustable arm length small torque measuring device according to claim 6, characterized in that: A slide groove is provided in the opening, and the slide groove is arranged along the extension direction of the opening; a slide rail cooperating with the slide groove is provided on the adjustable force arm (4), and the slide rail is arranged along the extension direction of the adjustable force arm (4).

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