Static small-angle large-torque force application mechanism

Abstract

The utility model discloses a static small-angle large-torque force application mechanism. A force application shaft sleeve is rotatably mounted on a support frame through a bearing; one end of the swing arm is coaxially and fixedly connected with the force application shaft sleeve; one end of the push-pull mechanism is connected with the other end of the swing arm and can push the other end of the swing arm to swing around the axis of the force application shaft sleeve; the push-pull mechanism comprises a worm and gear transmission mechanism, a push-pull screw rod, a U-shaped hinge joint and a pin shaft; the worm and gear transmission mechanism is in transmission connection with the push-pull screw rod and can drive the push-pull screw rod to linearly move; one end of the push-pull lead screw is fixedly connected to a U-shaped hinge joint, and the U-shaped hinge joint is hinged to the other end of the swing arm through a pin shaft; the axis of the pin shaft perpendicularly intersects with the axis of the push-pull lead screw. The utility model has the advantages of simple structure and low cost, can ensure the safety and stability of a force application mechanism, ensures the stable output of large torque, and can effectively reduce the cost and weight of a large torque measuring device when being applied to the large torque measuring device.

Description

Technical Field

[0001] The utility model relates to the technical field of torque measuring devices, in particular to a static small-angle large-torque force applying mechanism. Background Art

[0002] At present, the force-applying mechanism of torque measuring devices with small torque values ​​is generally driven by a reducer. However, for large torque measuring devices with values ​​of tens of thousands of Newton meters or hundreds of thousands of Newton meters, the reducer required is large in size and weight, and has high cost. Therefore, a new force-applying mechanism is urgently needed for large torque measuring devices to reduce costs and weight. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a static small-angle large-torque force application mechanism.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A static small-angle and large-torque force-applying mechanism, comprising a support frame, a force-applying sleeve, a swing arm and a push-pull mechanism; the force-applying sleeve is rotatably mounted on the support frame through a bearing; one end of the swing arm is coaxially and fixedly connected to the force-applying sleeve; one end of the push-pull mechanism is connected to the other end of the swing arm, and can push the other end of the swing arm to swing around the axis of the force-applying sleeve; the push-pull mechanism comprises a worm gear transmission mechanism, a push-pull screw, a U-shaped hinge joint and a pin shaft; the worm gear transmission mechanism is transmission-connected to the push-pull screw and can drive the push-pull screw to move linearly; one end of the push-pull screw is fixedly connected to the U-shaped hinge joint, and the U-shaped hinge joint is hinged to the other end of the swing arm through a pin shaft; the axis of the pin shaft intersects perpendicularly with the axis of the push-pull screw.

[0006] Furthermore, the worm gear transmission mechanism includes a motor, a worm wheel and a worm, the worm wheel and the worm are meshingly driven, the worm is connected to the motor in driving connection, the inner circumference of the worm wheel has an internal thread matching the push-pull screw, and is threadedly connected to the push-pull screw through the internal thread.

[0007] Furthermore, an articulated mounting seat is fixedly installed on the support frame, the articulated mounting seat is hinged to the articulated shaft, the worm gear transmission mechanism is installed on the articulated shaft, one end of the push-pull screw rod passes through the articulated shaft and is connected to the U-shaped articulated head; the rotation axis of the articulated shaft intersects perpendicularly with the axis of the push-pull screw rod.

[0008] Furthermore, one end of the swing arm is provided with a through hole and is coaxially sleeved on the force-applying sleeve through the through hole.

[0009] Furthermore, the swing arm is in a teardrop shape, and the end with a larger diameter is coaxially connected to the force-applying sleeve.

[0010] The beneficial effects of the utility model are as follows: the force-applying mechanism of the utility model adopts a worm gear transmission mechanism to push and pull the swing arm to generate a static small-angle large torque around the axis of the force-applying shaft sleeve. The structure is simple and the cost is low. The worm gear has a unique self-locking function to ensure the safety and stability of the force-applying mechanism and ensure the stable output of large torque. When applied to a large torque measuring device, the cost of the large torque measuring device can be effectively reduced and its weight can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the static small-angle large-torque force-applying mechanism in the embodiment of the utility model;

[0012] Figure 2 It is a partial schematic diagram of a static small-angle large-torque force-applying mechanism in an embodiment of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0014] This embodiment provides a static small angle large torque force application mechanism, such as Figure 1-2 As shown, it includes a support frame 1, a force sleeve 2, a swing arm 3 and a push-pull mechanism 4; the force sleeve 2 is rotatably mounted on the support frame 1 through a bearing; one end of the swing arm 3 is coaxially fixedly connected to the force sleeve 2; one end of the push-pull mechanism 4 is connected to the other end of the swing arm 3, and can push the other end of the swing arm 3 to swing around the axis of the force sleeve 2; the push-pull mechanism 4 includes a worm gear transmission mechanism, a push-pull screw 41, a U-shaped hinge joint 51 and a pin 52; the worm gear transmission mechanism is transmission-connected to the push-pull screw 41 and can drive the push-pull screw 41 to move linearly; one end of the push-pull screw 41 is fixedly connected to the U-shaped hinge joint 51, and the U-shaped hinge joint 51 is hinged to the other end of the swing arm 3 through the pin 52; the axis of the pin 52 is perpendicular to the axis of the push-pull screw 41.

[0015] When used in a torque measuring device, one end of the standard torque sensor of the torque measuring device is fixedly connected to the force-applying sleeve. When torque needs to be applied to the standard torque sensor, the worm gear transmission mechanism is started, and the push-pull screw is driven to move linearly through the worm gear transmission mechanism, thereby pushing or pulling the other end of the swing arm to swing around the axis of the force-applying sleeve, further driving one end of the swing arm together with the force-applying sleeve to rotate axially, and the force-applying sleeve applies torque to the standard torque sensor.

[0016] In this embodiment, the worm gear transmission mechanism includes a motor, a worm wheel and a worm, the worm wheel and the worm are meshingly driven, the worm and the motor are transmission connected, the inner circumference of the worm wheel has an internal thread matching the push-pull screw 41, and is threadedly connected to the push-pull screw 41 through the internal thread.

[0017] In this embodiment, an articulated mounting seat 61 is fixedly installed on the support frame 1, and the articulated mounting seat 61 is hinged to the articulated shaft 62. The worm gear transmission mechanism is installed on the articulated shaft 62. One end of the push-pull screw rod 41 passes through the articulated shaft 62 and is connected to the U-shaped articulated head 51; the rotation axis of the articulated shaft 62 intersects perpendicularly with the axis of the push-pull screw rod 41.

[0018] In this embodiment, one end of the swing arm 3 is provided with a through hole and is coaxially sleeved on the force sleeve 2 through the through hole. The swing arm is sleeved on the force sleeve and is circumferentially fixed and transmits torque through a key, which can improve the installation stability of the swing arm and the force sleeve.

[0019] In this embodiment, the swing arm 3 is in a teardrop shape, and the end with a larger diameter is coaxially connected to the force-applying sleeve 2 .

[0020] The force-applying mechanism of this embodiment adopts a worm gear transmission mechanism to push and pull the swing arm to generate a static small-angle large torque around the axis of the force-applying shaft sleeve. It has a simple structure and low cost. The worm gear has a unique self-locking function to ensure the safety and stability of the force-applying mechanism and the stable output of large torque. The above structure can ensure that the worm gear push-pull mechanism applies tangential force to the swing arm, ensuring the stable output of large torque.

[0021] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the utility model.

Claims

1. A static small-angle large-torque force-applying mechanism, characterized in that: The invention comprises a support frame (1), a force-applying sleeve (2), a swing arm (3) and a push-pull mechanism (4); the force-applying sleeve (2) is rotatably mounted on the support frame (1) via a bearing; one end of the swing arm (3) is coaxially fixedly connected to the force-applying sleeve (2); one end of the push-pull mechanism (4) is connected to the other end of the swing arm (3) and can push the other end of the swing arm (3) to swing around the axis of the force-applying sleeve (2); the push-pull mechanism (4) comprises a worm gear transmission mechanism , a push-pull screw rod (41), a U-shaped hinge joint (51) and a pin shaft (52); the worm gear transmission mechanism is transmission-connected to the push-pull screw rod (41) and can drive the push-pull screw rod (41) to move linearly; one end of the push-pull screw rod (41) is fixedly connected to the U-shaped hinge joint (51), and the U-shaped hinge joint (51) is hinged to the other end of the swing arm (3) through the pin shaft (52); the axis of the pin shaft (52) intersects perpendicularly with the axis of the push-pull screw rod (41).

2. The static small-angle large-torque force-applying mechanism according to claim 1, characterized in that: The worm gear transmission mechanism comprises a motor, a worm wheel and a worm, the worm wheel and the worm are meshed for transmission, the worm is transmission-connected to the motor, the inner circumference of the worm wheel has an internal thread matching the push-pull screw rod (41), and is threadedly connected to the push-pull screw rod (41) via the internal thread.

3. The static small-angle large-torque force-applying mechanism according to claim 1, characterized in that: An articulated mounting seat (61) is fixedly mounted on the support frame (1), the articulated mounting seat (61) is articulated to an articulated shaft (62), a worm gear transmission mechanism is mounted on the articulated shaft (62), one end of the push-pull screw rod (41) passes through the articulated shaft (62) and is connected to the U-shaped articulated joint (51); the rotation axis of the articulated shaft (62) intersects perpendicularly with the axis of the push-pull screw rod (41).

4. The static small-angle large-torque force-applying mechanism according to claim 1, characterized in that: One end of the swing arm (3) is provided with a through hole and is coaxially sleeved on the force-applying shaft sleeve (2) through the through hole.

5. The static small-angle large-torque force-applying mechanism according to claim 1, characterized in that: The swing arm (3) is in the shape of a water drop, and the end with a larger diameter is coaxially connected to the force-applying shaft sleeve (2).

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