A T-type torque wrench

Abstract

The utility model provides a T-type torque wrench, comprising a handle and a wrench rod, wherein the upper end of the wrench rod is rotatably connected to the middle part of the handle, the upper end of the wrench rod is connected to a torque wheel, a plurality of wave crests are provided in the circumferential direction of the torque wheel, an arc-shaped transition surface is provided between two adjacent wave crests, and the arc-shaped transition surfaces are connected end to end in sequence to form a contour surface; a guide groove is provided on the handle, and the guide grooves are respectively located on both sides of the torque wheel; a top block and a spring are provided in the guide groove, and one end of the top block contacts the contour surface on the torque wheel; one end of the spring contacts the top block, and the other end of the spring is connected to an adjustment mechanism, and the adjustment mechanism is used to adjust the compression amount of the spring. In the utility model, when the wrench is in use, the pressure of the top block on the spring is parallel to the length direction of the spring, so that the compression direction of the spring is consistent with its length direction, and the spring will not be subjected to additional loads in other directions, thereby improving the accuracy of the torque output value of the wrench.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to a T-shaped torque wrench. Background Art

[0002] T-type torque wrench has the characteristics of small size, simple operation and low cost. It is suitable for occasions in assembly production lines where there are precise requirements for screw tightening torque. It can ensure that the tightening reaches the required torque without damaging the product by over-torque, ensuring stable product quality; such as for tightening screws on high-end bicycles, printers, and CNC machining center blades.

[0003] Existing T-type fixed torque wrenches rely on an axial compression spring mechanism. When the operator turns the wrench, a force pressing the wrench down is generated. The direction of this force is perpendicular to the setting direction of the spring. This downward force is superimposed on the axial spring, which causes the axial spring to bear additional load, causing the output torque value to deviate from the set target and affecting the tightening accuracy. Summary of the invention

[0004] The utility model aims to solve the deficiencies in the prior art and provide a T-shaped torque wrench.

[0005] The purpose of the utility model is achieved through the following technical solutions: a T-shaped torque wrench, comprising a handle and a wrench rod, the upper end of the wrench rod is rotatably connected to the middle part of the handle, the upper end of the wrench rod is connected to a torque wheel, a plurality of wave crests are arranged in the circumferential direction of the torque wheel, an arc-shaped transition surface is arranged between two adjacent wave crests, and the arc-shaped transition surfaces are connected end to end in sequence to form a contour surface;

[0006] The handle is provided with guide grooves, which are respectively located on both sides of the torque wheel; a top block and a spring are provided in the guide groove, one end of the top block contacts the contour surface on the torque wheel; one end of the spring contacts the top block, and the other end of the spring is connected to the adjustment mechanism, which is used to adjust the compression amount of the spring.

[0007] When the user uses the wrench, the user holds and rotates the handle. During the rotation of the handle, the top block moves along the contour surface of the torque wheel. The top block is subjected to the pressure of the spring so that contact pressure is formed between one end of the top block and the contour surface of the torque wheel, so that the top block drives the torque wheel to rotate during the movement, and drives the wrench rod to rotate with a certain output torque. The adjustment mechanism is used to adjust the compression amount of the spring to adjust the pressure of the spring on the top block, and then adjust the maximum output torque of the wrench. In the utility model, when the wrench is in use, the pressure of the top block on the spring is parallel to the length direction of the spring, so that the compression direction of the spring is consistent with its length direction, and the spring will not be subjected to additional loads in other directions, thereby improving the accuracy of the torque output value of the wrench. In the utility model, springs and top blocks are symmetrically arranged on both sides of the torque wheel, so that the torque wheel is subjected to symmetrical force, which can reduce the output torque fluctuation of the wrench and improve the stability of the torque output.

[0008] Preferably, the end surface of the top block close to one end of the torque wheel is an arc surface.

[0009] Preferably, the adjustment mechanism comprises an adjusting screw and a gasket, a threaded hole is provided at one end of the guide groove away from the torque wheel, the adjusting screw is threadedly connected in the threaded hole, and the gasket is arranged between the adjusting screw and the spring.

[0010] Preferably, the distance between the lowest position on the arc-shaped transition surface between two adjacent wave crest positions and one of the wave crest positions is greater than the distance between the lowest position and the other wave crest position.

[0011] Preferably, an even number of wave peaks are provided on the circumferential direction of the torque wheel.

[0012] Preferably, a wrench groove or a connector is provided at the lower end of the wrench rod.

[0013] Preferably, the cross section of the wrench slot is a regular hexagon.

[0014] The beneficial effects of the utility model are:

[0015] 1. In the utility model, when the wrench is in use, the pressure of the top block on the spring is parallel to the length direction of the spring, so that the compression direction of the spring is consistent with its length direction, and the spring will not be subjected to additional loads in other directions, thereby improving the accuracy of the torque output value of the wrench.

[0016] 2. In the present invention, springs and top blocks are symmetrically arranged on both sides of the torque wheel, so that the torque wheel is subjected to symmetrical force, which can reduce the output torque fluctuation of the wrench and improve the stability of the torque output. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the utility model.

[0018] Figure 2 It is a longitudinal sectional view of the utility model.

[0019] Figure 3 for Figure 1 Cross-sectional view along the AA direction.

[0020] Figure 4 A cross-sectional view of the torque wheel.

[0021] In the figure: 1. handle, 2. wrench rod, 3. wrench slot, 4. guide slot, 5. top block, 6. spring, 7. torque wheel, 7-1. wave crest position, 7-2. arc-shaped transition surface, 9. gasket, 10. adjusting screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] like Figures 1 to 3 As shown, a T-shaped torque wrench comprises a handle 1 and a wrench rod 2. The upper end of the wrench rod 2 is rotatably connected to the middle part of the handle 1. The upper end of the wrench rod 2 is connected to a torque wheel 7. The torque wheel 7 is provided with a plurality of wave crests 7-1 in the circumferential direction. An arcuate transition surface 7-2 is provided between two adjacent wave crests 7-1. The arcuate transition surfaces 7-2 are connected end to end in sequence to form a contour surface, and the contour surface is a closed annular surface.

[0024] The handle 1 is provided with guide grooves 4, which are respectively located on both sides of the torque wheel 7; a top block 5 and a spring 6 are provided in the guide groove 4, and one end of the top block 5 contacts the contour surface on the torque wheel 7. The end surface of the top block 5 close to one end of the torque wheel 7 is an arc surface. One end of the spring 6 contacts the top block 5, and the other end of the spring 6 is connected to the adjustment mechanism, which is used to adjust the compression amount of the spring 6.

[0025] The handle 1 and the wrench rod 2 are arranged in a "T" shape. The wave crest position 7-1 is the highest point of the torque wheel 7 in the circumferential direction.

[0026] When the user uses the wrench, the user holds and rotates the handle 1. During the rotation of the handle 1, the top block 5 moves along the contour surface of the torque wheel 7. The top block 5 is subjected to the pressure of the spring 6 so that one end of the top block 5 forms a contact pressure with the contour surface of the torque wheel 7, so that the top block 5 drives the torque wheel 7 to rotate during the movement, and drives the wrench rod 2 to rotate with a certain output torque. The adjustment mechanism is used to adjust the compression amount of the spring 6 to adjust the pressure of the spring 6 on the top block 5, and then adjust the maximum output torque of the wrench. In the utility model, when the wrench is in use, the pressure of the top block 5 on the spring 6 is parallel to the length direction of the spring 6, so that the compression direction of the spring 6 is consistent with its length direction, and the spring 6 will not be subjected to additional loads in other directions, thereby improving the accuracy of the torque output value of the wrench. In the utility model, the springs 6 and the top blocks 5 are symmetrically arranged on both sides of the torque wheel 7, so that the torque wheel 7 is symmetrically stressed, which can reduce the output torque fluctuation of the wrench and improve the stability of the torque output.

[0027] Among them, the distance between the lowest position on the arc-shaped transition surface 7-2 between two adjacent wave crest positions 7-1 and one of the wave crest positions 7-1 is greater than the distance between the lowest position on the arc-shaped transition surface 7-2 between two adjacent wave crest positions 7-1 and one of the wave crest positions 7-1. Since the distance between the lowest position on the arc-shaped transition surface 7-2 between two adjacent wave crest positions 7-1 and one of the wave crest positions 7-1 is greater than the distance between the lowest position on the arc-shaped transition surface 7-2 and the center position between the two adjacent wave crest positions 7-1, the steepness of the transition surface between the lowest position on the arc-shaped transition surface 7-2 and the wave crest positions 7-1 on both sides is different. When the wrench rotates in the clockwise and counterclockwise directions, the top block 5 will move on the transition surfaces with different steepness, thereby generating output torques of different magnitudes, so that the wrench has different output torques when rotating in different directions.

[0028] An even number of wave crests 7 - 1 are provided in the circumferential direction of the torque wheel 7. In this embodiment, eight wave crests 7 - 1 are provided in the circumferential direction of the torque wheel 7.

[0029] The adjustment mechanism includes an adjustment screw 10 and a gasket 9. A threaded hole is provided at one end of the guide groove 4 away from the torque wheel 7. The adjustment screw 10 is threadedly connected in the threaded hole. The gasket 9 is arranged between the adjustment screw and the spring 6. Among them, the adjustment screw 10 adopts a locking screw, and the spring 6 adopts a high-stability spring 6. When the output torque of the wrench is attenuated or deviates from the set torque value, the compression amount of the spring 6 can be adjusted by adjusting the screw, thereby adjusting the output torque value of the wrench.

[0030] The lower end of the spanner rod 2 is provided with a spanner groove 3 or a connector. The cross-sectional shape of the spanner groove 3 can be set according to actual needs. In the present embodiment, the cross section of the spanner groove 3 is a regular hexagon. The cross section of the connector is a square, and the connector is used to connect a hexagonal sleeve.

[0031] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A T-type torque wrench, characterized in that: It includes a handle and a wrench rod, the upper end of the wrench rod is rotatably connected to the middle part of the handle, the upper end of the wrench rod is connected to a torque wheel, a plurality of wave crests are arranged in the circumferential direction of the torque wheel, an arc-shaped transition surface is arranged between two adjacent wave crests, and the arc-shaped transition surfaces are connected end to end in sequence to form a contour surface; The handle is provided with guide grooves, which are respectively located on both sides of the torque wheel; a top block and a spring are provided in the guide groove, one end of the top block contacts the contour surface on the torque wheel; one end of the spring contacts the top block, and the other end of the spring is connected to the adjustment mechanism, which is used to adjust the compression amount of the spring.

2. A T-type torque wrench according to claim 1, characterized in that: The end surface of the top block close to one end of the torque wheel is an arc surface.

3. A T-type torque wrench according to claim 1, characterized in that: The adjusting mechanism comprises an adjusting screw and a gasket. A threaded hole is arranged at one end of the guide groove away from the torque wheel. The adjusting screw is threadedly connected in the threaded hole. The gasket is arranged between the adjusting screw and the spring.

4. A T-type torque wrench according to claim 1, characterized in that: The distance between the lowest position on the arc-shaped transition surface between two adjacent wave crest positions and one of the wave crest positions is greater than the distance between the lowest position and the other wave crest position.

5. A T-type torque wrench according to claim 1, characterized in that: An even number of wave crests are arranged in the circumferential direction of the torque wheel.

6. A T-type torque wrench according to claim 1, characterized in that: The lower end of the wrench rod is provided with a wrench groove or a connecting head.

7. A T-type torque wrench according to claim 6, characterized in that: The cross section of the wrench slot is a regular hexagon.

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