A device for detecting the rotational torque of a sawtooth transmission thread

Abstract

The present invention relates to a detection device, in particular, a device for detecting the rotational torque of a sawtooth transmission thread. The present invention provides the following technical solution: a device for detecting the rotational torque of a sawtooth transmission thread, comprising a base, a clamping device, a torque sensor and a motor are sequentially arranged on the base, a coupling is respectively arranged at both axial ends of the torque sensor, the output shaft of the motor is connected to the torque sensor through a coupling, the torque sensor can be connected to a screw with a sawtooth thread through another coupling, the base is provided with an installation cavity corresponding to the clamping device, the clamping device comprises two clamping members arranged opposite to each other and a sliding sleeve telescopically connected to the clamping member, the sliding sleeve can be slidably arranged on a support rod, two support rods are arranged in parallel and are respectively fixed in the installation cavity, and the sliding sleeve is provided with an axial hole adapted to the support rod corresponding to the support rod. The present invention can be used to detect the torque required for the rotation of a sawtooth transmission thread.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a device for detecting the rotation torque of a sawtooth transmission thread. Background Art

[0002] Transmission threads include trapezoidal threads, rectangular threads and sawtooth threads. Among them, sawtooth threads are used to transmit unidirectional power. They are generally set on a screw with sawtooth threads and a screw that matches the screw. The screw rotates relative to the sleeve under the drive of the motor, so that the sleeve can move linearly along the screw.

[0003] Ideally, when the motor drives the screw with sawtooth threads to rotate relative to the sleeve, the motor speed is the screw speed. However, the existence of the sawtooth transmission thread rotation torque will hinder the rotation of the screw relative to the sleeve, affecting the screw speed, thereby affecting the movement rate of the sleeve, resulting in the accuracy of the sawtooth transmission thread transmission being affected. Therefore, it is necessary to detect the size of the screw with sawtooth threads rotation torque before use, so as to accurately determine the movement rate of the sleeve. However, there is currently no equipment on the market that specifically detects the sawtooth transmission thread rotation torque. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a device for detecting the rotation torque of a sawtooth transmission thread, which can detect the torque required for the rotation of the sawtooth transmission thread.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting the rotational torque force of a sawtooth transmission thread, comprising a base, on which a clamping device, a torque sensor and a motor are sequentially arranged, a coupling is respectively arranged at both axial ends of the torque sensor, the output shaft of the motor is connected to the torque sensor through a coupling, the torque sensor can be connected to a screw with a sawtooth thread through another coupling, the base is provided with an installation cavity corresponding to the clamping device, the clamping device comprises two clamping members arranged opposite to each other and a sliding sleeve telescopically connected to the clamping members, the sliding sleeve can be slidably arranged on a support rod, the support rod is provided with two parallel rods and are respectively fixed in the installation cavity, and the sliding sleeve is provided with an axial hole matching the support rod.

[0006] By adopting the above technical scheme, a screw with a sawtooth thread is connected to a torque sensor through a coupling, a screw sleeve matched with the screw is arranged on the screw, and is clamped by a clamping device to prevent the screw sleeve from rotating. The torque sensor is connected to a motor through a coupling relative to the other end connected to the screw, and can measure the process in which the torsional force gradually increases until it stabilizes during the start-up of the motor, wherein the torsional force of the motor when the screw starts to rotate relative to the screw sleeve is the torque required for the rotation of the sawtooth transmission thread, thereby detecting the torque required for the rotation of the sawtooth transmission thread; wherein the clamping device clamps the screw sleeve through two clamping members arranged opposite to each other, the clamping members can be telescopically arranged relative to the sliding sleeve, and the distance between the two clamping members can be adjusted to facilitate clamping the screw sleeve, and the sliding sleeve is slidably arranged on the support rod through the axial hole, so that the clamping member and the screw sleeve can move linearly along the screw sleeve, thereby preventing the screw sleeve from rotating.

[0007] Furthermore, a placement plate is provided on the upper surface of the clamping member, and weights are placed in the placement plate.

[0008] By adopting the above technical solution, the placement of the storage plate is to enable the clamping piece to place weights. Placing weights on the clamping piece is equivalent to increasing the weight of the screw sleeve. By placing weights of different weights, the rotational torque of the serrated transmission thread under different pressures can be detected.

[0009] Furthermore, baffles are provided around the storage plate, and the baffles are connected end to end to form a frame shape.

[0010] By adopting the above technical solution, such an arrangement can facilitate the placement of the weights and prevent the weights from falling from the storage plate during the movement.

[0011] Furthermore, the sliding sleeve is provided with a spring groove corresponding to the clamping member, a spring is arranged in the spring groove, and the clamping member is provided with a telescopic member that can extend into the spring groove and contact with the spring.

[0012] By adopting the above technical scheme, the clamping member is arranged so that it can be telescopically connected to the sliding sleeve by compressing the spring of the telescopic member connected to it; the screw sleeve to be fixed is placed between the two clamping members, and the clamping member moves toward the sliding sleeve to which it is telescopically connected. After the telescopic member compresses the spring, the spring generates a reverse force on the telescopic member, which is transmitted to the clamping member and acts on the screw sleeve to be fixed, so that the screw sleeve is fixed between the two clamping members.

[0013] Furthermore, a clamping block is provided at one end of the telescopic member extending into the spring slot, and the size of the clamping block is larger than the opening of the spring slot.

[0014] By adopting the above technical solution, the telescopic member can be connected to the spring groove by the clamping block being clamped in the spring groove, thereby preventing the telescopic member from being separated from the spring groove.

[0015] Furthermore, a deformable flexible elastic pad is provided at the end surface of the clamping member opposite to the other clamping member.

[0016] By adopting the above technical solution, the flexible elastic pad will generate rebound force after being squeezed and deformed, giving corresponding force to the screw sleeve in contact with it, thereby enhancing the clamping ability of the clamping member on the screw sleeve and making the clamping effect of the clamping member better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the clamping device.

[0019] Figure 3 It is a schematic diagram of the structure of the clamping member, the storage plate, the baffle and the weight.

[0020] Figure 4 for Figure 3 Top view of the . DETAILED DESCRIPTION

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-4The device shown is for detecting the rotational torque force of a sawtooth transmission thread, comprising a base 1, on which a clamping device 2, a torque sensor 3 and a motor 4 are sequentially arranged, a coupling 5 is respectively arranged at both axial ends of the torque sensor 3, the output shaft of the motor 4 is connected to the torque sensor 3 through the coupling 5, and the torque sensor 3 can be connected to a screw with a sawtooth thread through another coupling 5, the base 1 is provided with an installation cavity 11 corresponding to the clamping device 2, the clamping device 2 comprises two clamping members 21 arranged opposite to each other and a sliding sleeve 22 telescopically connected to the clamping member 21, the sliding sleeve 22 can be slidably arranged on a support rod 23, two support rods 23 are arranged in parallel and are respectively fixed in the installation cavity 11, and the sliding sleeve 22 is provided with an axial hole 6 corresponding to the support rod 23 that matches it. A screw 15 with a sawtooth thread is connected to a torque sensor 3 through a coupling 5, a screw sleeve 16 matched with the screw 15 is set on the screw 15, and is clamped by a clamping device 2 to prevent the screw sleeve 16 from rotating. The torque sensor 3 is connected to the motor 4 through a coupling 5 relative to the other end connected to the screw 15, and can measure the process in which the torsional force gradually increases until it stabilizes during the startup of the motor 4, wherein the torsional force of the motor 4 when the screw 15 starts to rotate relative to the screw sleeve 16 is the torque required for the rotation of the sawtooth transmission thread, thereby detecting the torque required for the rotation of the sawtooth transmission thread; wherein the clamping device 2 clamps the screw sleeve 16 through two clamping members 21 arranged opposite to each other, the clamping member 21 can be telescopically arranged relative to the sliding sleeve 22, and the distance between the two clamping members 21 can be adjusted to facilitate clamping the screw sleeve 16, and the sliding sleeve 22 is slidably arranged on the support rod 23 through the shaft hole 6, so that the clamping member 21 and the screw sleeve 16 can move linearly along the screw sleeve 16, thereby preventing the screw sleeve 16 from rotating.

[0023] An angle sensor is arranged on the screw 15. When the angle sensor detects that the screw 15 starts to rotate, the torsional force of the motor 4 detected by the torque sensor 3 is the torque required for the rotation of the sawtooth transmission thread.

[0024] In addition, the motor 4 can be provided with a reducer to slow down the rotation speed of the motor 4 and amplify the torque change process during the startup of the motor 4, thereby facilitating the observation of the torque of the motor 4 when the screw 15 starts to rotate relative to the screw sleeve 16, making it easier to detect the torque required for the rotation of the serrated transmission thread.

[0025] The upper surface of the clamping member 21 is provided with a placing plate 7, and a weight 8 is placed in the placing plate 7. The placing plate 7 is provided so that the clamping member 21 can be provided with the weight 8. Placing the weight 8 on the clamping member 21 is equivalent to increasing the weight of the screw sleeve 16. By placing weights 8 of different weights, the rotation torque of the sawtooth transmission thread under different pressures can be detected.

[0026] Baffles 9 are arranged around the storage plate 7, and the baffles 9 are connected end to end to form a frame shape. This arrangement can facilitate the placement of the weights 8 and prevent the weights 8 from falling off the storage plate 7 during movement.

[0027] The sliding sleeve 22 is provided with a spring groove 10 corresponding to the clamping member 21, and a spring 12 is provided in the spring groove 10. The clamping member 21 is provided with a telescopic member 13 that can be inserted into the spring groove 10 and abut against the spring 12. This arrangement allows the clamping member 21 to be telescopically connected to the sliding sleeve 22 by compressing the spring 12 through the telescopic member 13 connected thereto; the screw sleeve 16 to be fixed is placed between the two clamping members 21, and the clamping member 21 is moved toward the sliding sleeve 22 to which it is telescopically connected. After the telescopic member 13 compresses the spring 12, the spring 12 generates a reverse force on the telescopic member 13, which is transmitted to the clamping member 21 and acts on the screw sleeve 16 to be fixed, so that the screw sleeve 16 is fixed between the two clamping members 21.

[0028] One end of the telescopic member 13 extending into the spring slot 10 is provided with a block 17, and the size of the block 17 is larger than the opening of the spring slot 10. This arrangement allows the telescopic member 13 to be connected to the spring slot 10 by the block 17 being stuck in the spring slot 10, thereby preventing the telescopic member 13 from being separated from the spring slot 10.

[0029] In addition, a cylinder may be provided between the sliding sleeve 22 and the clamping member 21, and the cylinder may push the clamping member 21 to move telescopically.

[0030] The end surface of the clamping member 21 opposite to the other clamping member 21 is provided with a deformable flexible elastic pad 14. The flexible elastic pad 14 generates a rebound force after being squeezed and deformed, giving a corresponding force to the screw sleeve 16 in contact with it, thereby enhancing the clamping ability of the clamping member 21 on the screw sleeve 16, making the clamping effect of the clamping member 21 better.

[0031] The flexible elastic pad 14 can be made of rubber material.

Claims

1. A device for detecting the rotational torque of a sawtooth transmission thread, comprising a base, characterized in that: The base is provided with a clamping device, a torque sensor and a motor in sequence, a coupling is provided at each axial end of the torque sensor, the output shaft of the motor is connected to the torque sensor through a coupling, and the torque sensor can be connected to a screw with a serrated thread through another coupling, the base is provided with an installation cavity corresponding to the clamping device, the clamping device comprises two clamping members arranged opposite to each other and a sliding sleeve telescopically connected to the clamping members, the sliding sleeve is slidably arranged on the support rod, the support rod is provided with two parallel members and are respectively fixed in the installation cavity, the sliding sleeve is provided with an axial hole adapted to the support rod, the sliding sleeve is provided with a spring groove corresponding to the clamping member, a spring is provided in the spring groove, the clamping member is provided with a telescopic member which can extend into the spring groove and contact with the spring, a deformable flexible elastic pad is provided at the end face of the clamping member relative to the other clamping member, and the motor is provided with a reducer.

2. The device for detecting the rotation torque of a sawtooth transmission thread according to claim 1, characterized in that: A placing plate is provided on the upper surface of the clamping member, and weights are placed in the placing plate.

3. The device for detecting the rotation torque of a sawtooth transmission thread according to claim 2, characterized in that: Baffles are arranged around the storage plate, and the baffles are connected end to end to form a frame shape.

4. The device for detecting the rotation torque of a sawtooth transmission thread according to claim 1, characterized in that: One end of the telescopic member extending into the spring slot is provided with a clamping block, and the size of the clamping block is larger than the opening of the spring slot.

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