Adjustable torque wrench

Abstract

The utility model relates to the technical field of wrenches, and discloses an adjustable torque wrench which comprises a wrench body, a torsion meter is rotatably connected to the middle of the interior of the wrench body, a worm is rotatably connected to the middle of the interior of the wrench body, a rotating rod is fixedly connected to the front end of the worm, a first knob is fixedly connected to the front end of the rotating rod, and a second knob is fixedly connected to the front end of the first knob. A worm gear is rotatably connected to the middle of the interior of the wrench body and meshed with the worm, a telescopic rod is slidably connected to the interior of the wrench body, a limiting plate is fixedly connected to the left end of the telescopic rod, the worm gear is meshed with the telescopic rod, and a clamping jaw is fixedly connected to the right end of the telescopic rod. The first knob drives the rotating rod to rotate, the rotating rod drives the worm to rotate, the worm drives the worm gear to rotate, the worm gear pushes the telescopic rod to slide to push the clamping jaw to move, clamping angles with different radians are formed between the clamping jaw and the wrench body, and the clamping function of water heater tooth sockets with different curvatures can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to an adjustable torque wrench. Background Art

[0002] The concept of adjustable torque wrenches can be traced back to the early 20th century. With the development of the industrial revolution and mechanized production, the demand for precise tightening torque has also increased. The original torque wrenches were simple in design and only used mechanical levers or springs to achieve torque control. With the advancement of technology, modern adjustable torque wrenches integrate more complex mechanical and electronic components to provide more precise torque control and measurement functions.

[0003] The existing technologies include: spring-type mechanical torque wrenches control torque through a spring and lever mechanism. When the set torque is reached, the lever triggers a stop mechanism, causing the wrench to stop applying force. Electronic torque wrenches are torque wrenches with electronic measurement and control units. Hydraulic torque wrenches use hydraulic systems to achieve torque control. Ultrasonic torque wrenches use ultrasonic technology to measure the tension of the bolt, thereby indirectly measuring the torque.

[0004] However, the traditional wrench has no torque prompt when working. Therefore, the tightness of the water heater socket when installing can only be controlled by the operator's experience. If the water heater socket is installed too tightly, the wrench will damage the screw threads of the water heater socket, and if it is installed too loose, the container will leak. Therefore, an adjustable torque wrench is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an adjustable torque wrench, which aims to improve the problem in the prior art that the wrench damages the threads of the water heater sleeve due to over-tightening of the wrench to install the water heater sleeve or causes the container to leak due to over-tightening.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an adjustable torque wrench, comprising a wrench body, a torque meter is rotatably connected to the middle part of the inner part of the wrench body, a worm is rotatably connected to the middle part of the inner part of the wrench body, a rotating rod is fixedly connected to the front end of the worm, a knob is fixedly connected to the front end of the rotating rod, a worm wheel is rotatably connected to the middle part of the inner part of the wrench body, the worm wheel and the worm are meshed with each other, a telescopic rod is slidably connected to the inside of the wrench body, the left end of the telescopic rod is fixedly connected to a limiting plate, the worm wheel and the telescopic rod are meshed with each other, the right end of the telescopic rod is fixedly connected to a claw, a positioning assembly is arranged inside the claw, and the positioning assembly is used to position the water heater socket.

[0007] Furthermore, the positioning assembly includes a two-way threaded rod, which is rotatably connected to the inside of the claw, and the upper end of the two-way threaded rod is fixedly connected to a knob 2, and the inner middle part of the claw is slidably connected to two sliders, and the upper and lower ends of the two-way threaded rod are respectively threadedly connected to the inside of the two sliders, and the inside of the two sliders are both rotatably connected to one end of a connecting rod, and the other ends of the two connecting rods are both rotatably connected to a connecting block, and the inside of the claw is slidably connected to a positioning block, and the two connecting blocks are respectively fixedly connected to the upper and lower ends of the front side of the positioning block, and the upper and lower sides of the positioning block are fixedly connected to limiting blocks.

[0008] Furthermore, an anti-slip pad is provided on the outer periphery of the left end of the torque meter, and a scale is provided on the left end of the torque meter.

[0009] Furthermore, a slide groove 1 is provided inside the wrench body, and the telescopic rod and the limiting plate both slide inside the slide groove 1.

[0010] Furthermore, a tooth groove is formed on the front side of the telescopic rod, and the worm gear is meshed inside the tooth groove.

[0011] Furthermore, a second slide groove is provided inside the clamping claw, and the two sliding blocks, the two connecting rods and the two connecting blocks all slide inside the second slide groove.

[0012] Furthermore, the positioning block and the two limiting blocks all slide inside the second slide groove.

[0013] Furthermore, anti-slip grooves are provided on the outer circumferences of the knob 1 and the knob 2.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, by rotating the knob 1, the knob 1 drives the rotating rod to rotate, the rotating rod drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the telescopic rod to slide, and drives the claw to slide, and clamping angles of different arcs will be formed between the claw and the wrench body, so that the clamping function of the water heater braces with different curvatures can be realized.

[0016] 2. In the utility model, knob 2 drives the bidirectional threaded rod to rotate, the bidirectional threaded rod pushes the two sliders to slide away, the two sliders push the two connecting rods to slide away, the two connecting rods push the two connecting blocks and the positioning block to slide out of the inside of the claws, thereby realizing the function of screw thread positioning of water heater sockets with different curvatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of the adjustable torque wrench proposed by the utility model;

[0018] Figure 2 This is a schematic structural diagram of the wrench body of the adjustable torque wrench proposed by the utility model;

[0019] Figure 3 This is a schematic structural diagram of the telescopic rod of the adjustable torque wrench proposed by the utility model;

[0020] Figure 4 The present invention is a schematic structural diagram of a positioning block of an adjustable torque wrench.

[0021] Legend:

[0022] 1. Wrench body; 2. Torque meter; 3. Rotating rod; 4. Worm gear; 5. Worm; 6. Telescopic rod; 7. Limit plate; 8. Claw; 9. Knob 1; 10. Tooth groove; 11. Slide groove 1; 12. Knob 2; 13. Bidirectional threaded rod; 14. Slider; 15. Connecting rod; 16. Connecting block; 17. Positioning block; 18. Limit block; 19. Slide groove 2. DETAILED DESCRIPTION

[0023] 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 without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-Figure 3The utility model provides an embodiment of an adjustable torque wrench, comprising a wrench body 1, the wrench body 1 is used to support the movement of the internal structure, the inner middle part of the wrench body 1 is rotatably connected with a torque meter 2, the torque meter 2 is used to adjust the torque, the left end periphery of the torque meter 2 is provided with an anti-skid pad, the anti-skid pad can prevent the user from sliding when operating the torque meter 2, the left end of the torque meter 2 is provided with a scale, the scale can assist the user to confirm the torque, the inner middle part of the wrench body 1 is rotatably connected with a worm 5, the worm 5 is used to drive the worm wheel 4 to rotate the rod, the front end of the worm 5 is fixedly connected with a rotating rod 3, the rotating rod 3 drives the worm 5 to rotate, the front end of the rotating rod 3 is fixedly connected with a knob 9, the knob 9 drives the rotating rod 3 to rotate, the inner middle part of the wrench body 1 A worm gear 4 is rotatably connected, and the worm gear 4 drives the telescopic rod 6 to slide. The worm gear 4 and the worm 5 are meshed with each other. The telescopic rod 6 is slidably connected inside the wrench body 1. The telescopic rod 6 is used to push the claw 8 to move. The left end of the telescopic rod 6 is fixedly connected to a limit plate 7. The limit plate 7 prevents the telescopic rod 6 from sliding excessively. A slide groove 11 is provided inside the wrench body 1. The telescopic rod 6 and the limit plate 7 both slide inside the slide groove 11. The worm gear 4 and the telescopic rod 6 are meshed with each other. A tooth groove 10 is provided on the front side of the telescopic rod 6. The worm gear 4 is meshed inside the tooth groove 10. The right end of the telescopic rod 6 is fixedly connected with a claw 8. The claw 8 is used to bite and fix the water heater brace. A positioning component is provided inside the claw 8, and the positioning component is used to position the water heater brace.

[0025] Reference Figure 1 and Figure 4 The positioning assembly includes a bidirectional threaded rod 13, which drives two sliders 14 to slide. The bidirectional threaded rod 13 is rotatably connected to the inside of the claw 8. The upper end of the bidirectional threaded rod 13 is fixedly connected to a knob 2 12, which is used to drive the bidirectional threaded rod 13 to rotate. The outer peripheries of the knobs 1 9 and 12 are provided with anti-slip grooves, which can prevent the knobs 1 9 and 12 from sliding. The middle part of the inner part of the claw 8 is slidably connected to two sliders 14, and the two sliders 14 push the two connecting rods 15 to slide. The upper and lower ends of the bidirectional threaded rod 13 are respectively threadedly connected to the inside of the two sliders 14, and the insides of the two sliders 14 are rotatably connected to one end of the connecting rod 15. The two connecting rods 15 push The two connecting blocks 16 slide and move, and the other ends of the two connecting rods 15 are rotatably connected with the connecting blocks 16. The two connecting blocks 16 are used to fix the other end shafts of the two connecting rods 15. A second slide groove 19 is opened inside the claw 8. The two sliders 14, the two connecting rods 15 and the two connecting blocks 16 all slide inside the second slide groove 19. The inside of the claw 8 is slidably connected with a positioning block 17. The positioning block 17 is used to position the water heater braces. The two connecting blocks 16 are respectively fixedly connected to the upper and lower ends of the front side of the positioning block 17. The upper and lower sides of the positioning block 17 are fixedly connected to the limiting blocks 18. The two limiting blocks 18 can prevent the positioning block 17 from slipping off. The positioning block 17 and the two limiting blocks 18 all slide inside the second slide groove 19.

[0026] Working principle: When using the device, you first need to adjust the torque of the torque meter 2, and then adjust the positioning block 17 according to the water heater sockets of different diameters. Water heater sockets of different diameters have different curvatures. In order to prevent the device from sliding during operation, turn the knob 2 12, and the knob 2 12 drives the bidirectional threaded rod 13 to rotate. The bidirectional threaded rod 13 pushes the two sliders 14 to slide away from each other, and the two sliders 14 push the two connecting rods 15 to slide away from each other. The two connecting rods 15 push the two connecting blocks 16 and the positioning block 17 to slide backward and extend out of the inside of the claw 8, thereby realizing the function of screw thread positioning of water heater sockets with different curvatures, turn the knob 19, and the knob 19 drives the rotating rod 3 to rotate, and the rotating rod 3 drives the worm 5 to rotate When the wrench body 1 is in operation, the worm gear 5 drives the worm wheel 4 to rotate, and the worm wheel 4 pushes the telescopic rod 6 to slide inside the wrench body 1. When the telescopic rod 6 slides, the claw 8 is pushed to move, and clamping angles of different arcs are formed between the claw 8 and the wrench body 1. In this way, the firm clamping function of the water heater sockets with different curvatures can be achieved. The one with too small curvature requires a larger wrapping range to be firmly clamped and stable. Otherwise, it is very easy for the equipment to slide and damage the screw threads of the water heater sockets when the equipment is working. Then, the torque meter 2 is moved to drive the wrench body 1 and the water heater sockets to rotate. When the torque of the water heater sockets reaches the set value of the torque meter 2, the torque meter 2 will rotate and abut against the left end of the wrench body 1, thereby ensuring the firmness of the installation of the water heater sockets.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable torque wrench, comprising a wrench body (1), characterized in that: The middle part of the wrench body (1) is rotatably connected to a torque meter (2), the middle part of the wrench body (1) is rotatably connected to a worm (5), the front end of the worm (5) is fixedly connected to a rotating rod (3), the front end of the rotating rod (3) is fixedly connected to a knob (9), the middle part of the wrench body (1) is rotatably connected to a worm wheel (4), the worm wheel (4) and the worm (5) are meshed with each other, the inside of the wrench body (1) is slidably connected to a telescopic rod (6), the left end of the telescopic rod (6) is fixedly connected to a limiting plate (7), the worm wheel (4) and the telescopic rod (6) are meshed with each other, the right end of the telescopic rod (6) is fixedly connected to a claw (8), a positioning component is arranged inside the claw (8), and the positioning component is used to position the water heater socket.

2. The adjustable torque wrench according to claim 1, characterized in that: The positioning assembly comprises a bidirectional threaded rod (13), the bidirectional threaded rod (13) being rotatably connected to the inside of the clamping claw (8), the upper end of the bidirectional threaded rod (13) being fixedly connected to a knob 2 (12), the middle part of the inside of the clamping claw (8) being slidably connected to two sliders (14), the upper and lower ends of the bidirectional threaded rod (13) being respectively threadedly connected to the inside of the two sliders (14), the inside of the two sliders (14) being rotatably connected to one end of a connecting rod (15), the other ends of the two connecting rods (15) being rotatably connected to a connecting block (16), the inside of the clamping claw (8) being slidably connected to a positioning block (17), the two connecting blocks (16) being respectively fixedly connected to the upper and lower ends of the front side of the positioning block (17), and the upper and lower sides of the positioning block (17) being fixedly connected to a limiting block (18).

3. The adjustable torque wrench according to claim 1, characterized in that: The outer periphery of the left end of the torque meter (2) is provided with an anti-slip pad, and the left end of the torque meter (2) is provided with a scale.

4. The adjustable torque wrench according to claim 1, characterized in that: A slide groove (11) is provided inside the wrench body (1), and the telescopic rod (6) and the limiting plate (7) both slide inside the slide groove (11).

5. The adjustable torque wrench according to claim 1, characterized in that: A tooth groove (10) is provided on the front side of the telescopic rod (6), and the worm wheel (4) is meshed inside the tooth groove (10).

6. The adjustable torque wrench according to claim 2, characterized in that: A second slide groove (19) is provided inside the clamping claw (8), and the two sliding blocks (14), the two connecting rods (15) and the two connecting blocks (16) all slide inside the second slide groove (19).

7. The adjustable torque wrench according to claim 6, characterized in that: The positioning block (17) and the two limiting blocks (18) all slide inside the second slide groove (19).

8. The adjustable torque wrench according to claim 2, characterized in that: The outer peripheries of the knob 1 (9) and the knob 2 (12) are both provided with anti-slip grooves.

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