Digital display torque wrench and operation method thereof

Abstract

The invention provides a digital display torque wrench and an operation method thereof, and relates to the technical field of torque wrenchs.The digital display torque wrench comprises a wrench body, a plurality of control buttons and a display screen are arranged on the outer surface of the wrench body, and a protection device is arranged in the wrench body and comprises a plurality of rectangular blocks; a plurality of rectangular blocks are arranged on the surface, located in the device body, of the control button, the rectangular blocks are fixedly connected with the outer surface, located in the device body, of the control button, a sliding frame is slidably connected to the inner wall of the first sliding groove, and a plurality of protruding blocks are fixedly connected to the top end of the sliding frame. The sliding frame is located below the control button, the position of the sliding frame is adjusted by moving the protruding rod, the control button can be normally used when parameters need to be adjusted, the position of the control button is locked when a torque wrench is used for screwing a workpiece, and the situation that the control button is touched by mistake, so that the parameters of the torque wrench are changed, and the using effect is affected is avoided. And the practicability and the stability of the torque wrench in use are improved.

Description

Technical Field

[0001] The invention relates to the technical field of torque wrenches, and in particular to a digital display torque wrench and an operating method thereof. Background Art

[0002] In the field of mechanical assembly and fastening, digital torque wrenches are precision tools that use digital display technology and are widely used in the automotive, machinery manufacturing, aerospace and other industries to accurately control the torque of components such as bolts and nuts. Digital torque wrenches convert mechanical stress into electrical signals through internal strain sensors and transmit them to the display screen. Operators can read the torque value intuitively, thereby achieving precise control of torque, greatly improving the reliability and safety of mechanical connections.

[0003] However, when using a digital torque wrench, the operator usually needs to hold the wrench handle with one hand and the drive end of the wrench with the other hand, and apply force slowly and evenly to gradually tighten the bolt or nut. However, if the finger accidentally touches the adjustment button on the wrench during the force application process, the set torque value parameter will change, resulting in wrong judgment when tightening the workpiece or the need to readjust the torque value to operate the workpiece, resulting in reduced stability and practicality when using the torque wrench.

[0004] Specifically, most of the existing digital torque wrench control buttons are directly exposed on the surface of the wrench body. When the operator focuses on applying force to tighten the workpiece, the involuntary movement of the hand or the interference of external factors can easily cause the fingers to touch the control button. Once the control button is accidentally touched, the change in the torque value parameter will directly affect the accuracy and consistency of the tightened workpiece. For example, during the assembly process of a car engine, if the torque value is set inaccurately due to accidentally touching the control button, the tightening force of the bolt may be insufficient or excessive, thereby affecting the performance and safety of the engine. In the aerospace field, the connection strength requirements for components are extremely high, and even a slight deviation in the torque value may cause serious safety accidents.

[0005] The Taiwan patent with the publication number TWI520818B discloses a digital control module for a torque wrench. In view of the problem that the operation buttons (such as setting buttons) are usually arranged between the handle and the display or between the display and the ratchet working head in the prior art, which increases the overall length of the wrench and increases the material cost and transportation cost, the operation button for setting the torque value is designed in the handle section, and a foldable protective cover is arranged in the handle section, which covers the operation button when closed to avoid accidental touch when holding. Although the scheme sets a protective cover to cover the operation button, the scheme needs to frequently open and close the operation protective cover in an emergency or when the parameters need to be adjusted frequently. The operation is relatively complicated, not convenient for quickly adjusting the parameters, and it is easy to cause operation errors due to the failure of the protective cover to be closed in place. In addition, the protective cover will reduce the protective effect due to wear or looseness during long-term use. When the operator holds the handle tightly, the force of the hand may be transmitted to the vicinity of the control button, and the control button is still susceptible to accidental touch. The protective cover still needs to be manually kept closed by the operator in the closed state, and the protective performance is limited.

[0006] Therefore, the existing digital torque wrenches have obvious deficiencies in preventing accidental touching of the control button. These problems seriously affect the stability and practicality of the digital torque wrench during use, and reduce the work efficiency and the accuracy of tightening the workpiece. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that if a person's finger accidentally touches the adjustment button on the wrench during the force application process, the set torque value parameter will change, resulting in an erroneous judgment when tightening the workpiece or the need to readjust the torque value to operate the workpiece, resulting in a decrease in stability and practicality when using the torque wrench, and to propose a digital torque wrench and an operating method thereof.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a digital torque wrench and an operating method thereof, comprising a device body, a plurality of control buttons and a display screen are arranged on the outer surface of the device body, a strain sensor capable of sensing mechanical stress is arranged inside the device body, a handle for holding the torque wrench as a whole is fixedly connected to one end of the device body, a head body is sleeved and installed on one end of the device body away from the handle, and a protective device is arranged inside the device body to prevent accidental touching of the control button when using the torque wrench.

[0009] The effect achieved by the above components is: when using the torque wrench, the head body is installed on one end of the body, and the torque unit and torque value of the wrench are adjusted through the control button on the outer surface of the body. The data can be observed through the display screen, and then the wrench head on the head body is put on the bolt or nut that needs to be tightened, one hand is held on the outer surface of the body close to the head body, and the other hand is held on the outer surface of the handle, and the wrench is pushed to rotate slowly as a whole. The mechanical stress sensed is converted into an electrical signal through the strain force sensor, and the data is transmitted to the display screen. During the tightening process, the display screen of the digital torque wrench is observed. When the torque value reaches the set value, stop applying force and pull the head body out away from the outer surface of the bolt or nut.

[0010] Preferably, the protective device includes a plurality of rectangular blocks, each of which is fixedly connected to the outer surface of the control button located inside the device body, the device body is provided with a first slide groove inside, the inner wall of the first slide groove is slidably connected to a sliding frame, and the top of the sliding frame is fixedly connected to a plurality of protrusions, each of which is respectively located below the rectangular blocks on the outer surface of each control button, and a first spring is provided on one side of the sliding frame, and the first spring is fixed to the inside of the device body for limiting the position of the sliding frame inside the first slide groove. One side of the sliding frame is fixedly connected to a convex rod, and a second slide groove is provided on one side of the device body, and the convex rod slides on the inner wall of the second slide groove, and one end of the convex rod protrudes from the outer surface of the device body, and a second spring and an insertion rod are provided on the outer surface of the convex rod, and the insertion rod is installed on the outer surface of the convex rod through the second spring and slides on the inner wall of the convex rod, and when the protrusion on the outer surface of the sliding frame is located below the rectangular block on the outer surface of the control button, one end of the insertion rod is against one side of the outer surface of the device body and the second spring is in a compressed state, and a hole is provided on the outer surface of the device body close to the insertion rod.

[0011] The effect achieved by the above components is as follows: by setting the sliding frame, when the digital torque wrench needs to be used to adjust the parameters through the control button on the outer surface of the device body, one side of the convex rod is pushed to control the convex rod to drive the sliding frame to move in the first sliding groove inside the device body, so that the sliding frame slides in the direction away from the control button and compresses the first spring, and the convex block at the top of the sliding frame is adjusted to be away from the bottom of the rectangular block on the outer surface of the control button. When the convex rod moves so that the insertion rod is located on one side of the insertion hole, the compressed second spring will push the insertion rod to move in the direction of the insertion hole to insert one end of the insertion rod into the inside of the insertion hole, thereby adjusting the position of the convex rod and the sliding frame. The position is fixed, and the control button can be pressed normally to adjust the parameters. After the adjustment is completed, when using the torque wrench, pull the plug rod to pull one end of the plug rod out of the socket and compress the second spring. The first spring inside the device body will push the sliding frame and the protruding rod to slide away from the socket, so that one end of the plug rod is against the outer surface of the device body, and the protruding block at the top of the sliding frame is located under the rectangular block on the outer surface of the control button. At this time, when the control button is pressed, the rectangular block on the outer surface of the control button will be blocked by the protruding block and cannot be pressed down normally, so as to avoid accidentally touching the control button during the use of the torque wrench as much as possible.

[0012] Preferably, one end of the insertion rod away from the sliding frame is fixedly connected to a slot block, and arc-shaped grooves are formed on the upper and lower sides of the slot block.

[0013] The effect achieved by the above components is that by pinching the two arc-shaped grooves on the upper and lower sides of the outer surface of the groove block, it is more convenient to pull and grasp the groove block to control the movement of the convex rod.

[0014] Preferably, a sealing sheet is fixedly connected to the outer surface of the protruding rod, one side of the sealing sheet is attached to the outer surface of the device body, and the length of the sealing sheet is at least twice the length of the second sliding groove.

[0015] The effect achieved by the above-mentioned components is: when the protruding rod is pulled to move, one side of the sealing sheet will slide on the outer surface of the device body, and when the protruding rod is at any position inside the second slide groove, the second slide groove can be covered by the sealing sheet to seal the second slide groove, thereby preventing dust and oil from entering the device body through the second slide groove as much as possible.

[0016] Preferably, an auxiliary ring is fixedly connected to one end of the inner wall of the jack, and the width of the auxiliary ring at one end away from the inner wall of the jack is greater than the width of the inner wall at one end close to the jack.

[0017] The effect achieved by the above components is: by setting the auxiliary ring, when the control protrusion moves in the direction of the socket, one end of the plug rod enters the auxiliary ring and can directly slide into the socket, without the need to accurately align the positions of the socket and the plug rod, thereby improving the convenience of using the protective device.

[0018] Preferably, an auxiliary device is provided inside the handle for further locking the position of the control button when the handle is held and the torque wrench is used.

[0019] Preferably, the auxiliary device includes two round rods, which slide on the inner wall of the handle, one end of the two round rods is located on one side of the sliding frame, one end of the two round rods is fixedly connected to a trapezoidal block, and a third sliding groove is provided on both sides of the interior of the handle, and a push rod is slidably connected to the inner wall of the third sliding groove, and the edge of one end of the push rod is an inclined surface, and the inclined surfaces of the surfaces of the two push rods fit the inclined surfaces of the outer surface of the trapezoidal block, and two third springs are provided on the outer surface of the push rod, and the third spring is installed inside the third sliding groove to limit the position of the push rod.

[0020] The effect achieved by the above-mentioned components is: when using the torque wrench, when holding the outer surface of the handle and applying force, the two push rods inside the handle will be pressed to slide toward the inside of the third sliding groove and compress the third spring. At the same time, one end of the push rod will move to one side of the trapezoidal block, pushing the trapezoidal block to drive the round rod to slide in the direction of the sliding frame, so that one end of the round rod is fitted against the surface of the sliding frame, and the position of the sliding frame is further restricted in the process of holding the handle, and accidental touching of the protruding rod during use to cause the sliding frame to move and unlock the control button is avoided as much as possible, and the stability of using the protective device is further improved. After releasing the push rods on both sides of the handle, the third spring returns to its original state and pushes the push rod to move outward back to its original position. When the protective device pushes the protruding rod to control the movement of the sliding frame, it pushes the round rod to make the round rod and the trapezoidal block return to their original positions.

[0021] Preferably, one side of the push rod is fixedly connected to an auxiliary rod, and a plurality of rubber strips are provided on a side of the auxiliary rod away from the push rod.

[0022] The effect achieved by the above components is: the several rubber strips arranged on the outer surface of the auxiliary rod can increase the friction when the operator's hand contacts the outer surface of the handle and the surface of the handle and the auxiliary rod, making it less likely for the hand to slip when holding the handle and applying force, thereby improving the stability when using the torque wrench.

[0023] Preferably, the method for operating a digital torque wrench, using the digital torque wrench, comprises the following steps:

[0024] S1. Install the head body sleeve on the head of the digital torque wrench at one end of the body;

[0025] S2. Adjust the torque unit and torque value of the wrench through the control button on the outer surface of the device;

[0026] S3, one end of the insertion rod is pressed against the outer surface of the device body, and the protrusion at the top of the sliding frame is located below the rectangular block on the outer surface of the control button;

[0027] S4. Put the wrench head on the head body onto the bolt or nut that needs to be tightened.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are:

[0029] In the present invention, a protective device is provided, a rectangular block is provided on the inner surface of the control button where the device body is located, so that the sliding frame is located below the control button, and the position of the sliding frame is adjusted by moving the protruding rod, so that the control button can be used normally when the parameters need to be adjusted, and the position of the control button can be locked when the torque wrench is used to tighten the workpiece, so that the parameters of the torque wrench are not changed due to accidental touching of the control button, which affects the use effect, thereby improving the practicality and stability of the torque wrench when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the sealing sheet of the present invention;

[0032] Figure 3 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the device body of the present invention;

[0033] Figure 4 For the present invention Figure 3 A local enlarged three-dimensional structure schematic diagram;

[0034] Figure 5 It is a schematic diagram of a partial cross-section of the three-dimensional structure of the handle of the present invention;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the sliding frame of the present invention;

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the push rod of the present invention.

[0037] Legend: 1. Device body; 2. Protective device; 3. Auxiliary device; 4. Handle; 5. Control button; 6. Display screen; 7. Head body; 21. Rectangular block; 22. First slide groove; 23. Sliding frame; 24. Protrusion; 25. First spring; 26. Protruding rod; 27. Second slide groove; 28. Second spring; 29. ​​Insert rod; 210. Socket; 211. Slot block; 212. Sealing sheet; 213. Auxiliary ring; 31. Round rod; 32. Trapezoidal block; 33. Push rod; 34. Third spring; 35. Third slide groove; 36. Auxiliary rod. DETAILED DESCRIPTION

[0038] Embodiment 1, as Figure 1-3As shown, a digital torque wrench and an operating method thereof include a body 1, a plurality of control buttons 5 and a display screen 6 are arranged on the outer surface of the body 1, a strain sensor capable of sensing mechanical stress is arranged inside the body 1, a handle 4 for holding the torque wrench as a whole is fixedly connected to one end of the body 1, a head body 7 is sleeved and installed at one end of the body 1 away from the handle 4, a protective device 2 is arranged inside the body 1 to prevent accidental touching of the control button 5 when the torque wrench is used, and when the torque wrench is used, the head body 7 is sleeved and installed at one end of the body 1 (the head installation of the digital torque wrench is well known to those skilled in the art, so it will not be described here in detail), and the head installation of the torque wrench is well known to those skilled in the art. Personnel are familiar with the operation, so it will not be repeated here. The torque unit and torque value of the wrench are adjusted through the control button 5 on the outer surface of the body 1, and the data can be observed through the display screen 6. Then, the wrench head on the head body 7 is put on the bolt or nut to be tightened, one hand is held on the outer surface of the body 1 near the head body 7, and the other hand is held on the outer surface of the handle 4, and the wrench is pushed to rotate slowly as a whole. The mechanical stress sensed is converted into an electrical signal through the strain force sensor, and the data is transmitted to the display screen 6. During the tightening process, the display screen 6 of the digital torque wrench is observed. When the torque value reaches the set value, the force is stopped and the head body 7 is pulled out away from the outer surface of the bolt or nut. During the force application process, the control button 5 is effectively isolated inside the device body 1 through the protective device 2, thereby preventing the operator from accidentally touching the control button due to hand position deviation or external interference, which may lead to parameter misadjustment. The operator can hold the outer surface of the device body 1 close to the head body 7 with one hand and firmly grasp the outer surface of the handle 4 with the other hand to apply a uniform and slow rotational force. During the entire tightening operation, the various components inside the device body 1 work together to ensure that every link from force signal acquisition, data transmission to display feedback is stable and reliable, and realize a continuous process of promptly and accurately notifying the operator to stop applying force and pull out the head body to complete the operation after reaching the preset torque value.

[0039] Reference Figure 1-6As shown, in this embodiment: the protective device 2 includes a plurality of rectangular blocks 21, each of which is fixedly connected to the outer surface of the control button 5 located inside the device body 1, a first slide groove 22 is provided inside the device body 1, a sliding frame 23 is slidably connected to the inner wall of the first slide groove 22, a plurality of protrusions 24 are fixedly connected to the top of the sliding frame 23, each protrusion 24 is respectively located below the rectangular block 21 on the outer surface of each control button 5, a first spring 25 is provided on one side of the sliding frame 23, the first spring 25 is fixed inside the device body 1 and is used to limit the position of the sliding frame 23 inside the first slide groove 22, a convex rod 26 is fixedly connected to one side of the sliding frame 23, a second slide groove 27 is provided on one side of the device body 1, and the convex rod 26 slides on the inner wall of the second slide groove 27 One end of the protruding rod 26 protrudes from the outer surface of the device body 1, and the outer surface of the protruding rod 26 is provided with a second spring 28 and an insertion rod 29. The insertion rod 29 is installed on the outer surface of the protruding rod 26 through the second spring 28 and slides on the inner wall of the protruding rod 26. When the protruding block 24 on the outer surface of the sliding frame 23 is located below the rectangular block 21 on the outer surface of the control button 5, one end of the insertion rod 29 is against one side of the outer surface of the device body 1 and the second spring 28 is in a compressed state. A plug hole 210 is provided on the side of the outer surface of the device body 1 close to the insertion rod 29. By setting the sliding frame 23, when the digital torque wrench needs to adjust the parameters through the control button 5 on the outer surface of the device body 1, push one side of the protruding rod 26 to control the protruding rod 26 to drive the sliding frame 23 to move in the first sliding groove 22 inside the device body 1 so that the sliding frame 23 moves away The first spring 25 is compressed by the first spring 25, and the first spring 25 is compressed by the second spring 28. The first spring 25 inside the body 1 pushes the sliding frame 23 and the protruding rod 26 to slide in the direction away from the control button 5 and compress the first spring 25. The protruding block 24 at the top of the sliding frame 23 is adjusted to be away from the rectangular block 21 on the outer surface of the control button 5. When the protruding rod 26 moves so that the plug rod 29 is located on one side of the insertion hole 210, the compressed second spring 28 will push the plug rod 29 to move in the direction of the insertion hole 210 and insert one end of the plug rod 29 into the inside of the insertion hole 210 to fix the positions of the protruding rod 26 and the sliding frame 23. At this time, the control button 5 can be pressed normally to adjust the parameters. After the adjustment is completed, the torque wrench is used to pull the plug rod 29 to pull one end of the plug rod 29 out of the inside of the insertion hole 210 and compress the second spring 28. The first spring 25 inside the body 1 will push the sliding frame 23 and the protruding rod 26 to slide in the direction away from the insertion hole 210, so that the plug rod 29 One end of the rod 29 is against the outer surface of the device body 1, and the protrusion 24 at the top of the sliding frame 23 is located below the rectangular block 21 on the outer surface of the control button 5. At this time, when the control button 5 is pressed, the rectangular block 21 on the outer surface of the control button 5 will be blocked by the protrusion 24 and cannot be pressed down normally, so as to avoid accidentally touching the control button 5 during the use of the torque wrench. By setting the protective device 2, by setting the rectangular block 21 on the inner surface of the control button 5 located on the device body 1, the sliding frame 23 is located below the control button 5, and the position of the sliding frame 23 is adjusted by moving the protrusion 26, so that the control button 5 can be used normally when the parameters need to be adjusted. When the torque wrench is used to tighten the workpiece, the position of the control button 5 is locked to avoid accidentally touching the control button 5, which causes the parameters of the torque wrench to change and affect the use effect.Improve the practicality and stability of torque wrenches when used.

[0040] This setting discloses an optimized structure of a protective device 2, which realizes effective protection and automatic locking of the control button during parameter adjustment and workpiece tightening through the ingenious design of the internal structure, greatly reducing the risk of torque parameter deviation and workpiece tightening error caused by accidentally touching the control button 5, and at the same time enables the locking state to be quickly and accurately released when parameters need to be adjusted to achieve flexible operation, thereby ensuring the accuracy and real-time performance of torque control, and further improving the safety and quality of product assembly.

[0041] Reference Figure 2-6 As shown, in this embodiment: the end of the insertion rod 29 away from the sliding frame 23 is fixedly connected to the groove block 211, and the upper and lower sides of the groove block 211 are provided with arc-shaped grooves. By pinching the two arc-shaped grooves on the upper and lower sides of the outer surface of the groove block 211, it is more convenient to pull and grasp the groove block 211 to control the movement of the protruding rod 26. The outer surface of the protruding rod 26 is fixedly connected to a sealing sheet 212, and one side of the sealing sheet 212 is attached to the outer surface of the device body 1. The length of the sealing sheet 212 is at least twice the length of the second slide groove 27. When the protruding rod 26 is pulled to move, one side of the sealing sheet 212 will slide on the outer surface of the device body 1. When the protruding rod 26 is in any position inside the second slide groove 27, the second slide groove 27 can be covered by the sealing sheet 212, and the second slide groove 27 is sealed to prevent dust and oil from entering the inside of the device body 1 through the second slide groove 27 as much as possible.

[0042] Through the optimized design of the sealing structure, the dust and dirt prevention ability of the digital torque wrench in actual use is greatly improved. Through the auxiliary role of the groove block 211 and the arc-shaped groove, the operator can more conveniently control the movement of the protruding rod 26, and realize the rapid and accurate conversion of the sealing state during the adjustment process, thereby effectively preventing external pollutants such as dust and oil from invading the interior of the device body 1 through the second slide groove 27, causing damage to internal components or affecting the stability of the equipment, thereby improving the durability and service life of the whole machine, reducing maintenance costs and failure risks, and ensuring that efficient and stable torque control and data transmission effects can be maintained in various complex and harsh environments.

[0043] Reference Figure 2-6 As shown, in this embodiment: one end of the inner wall of the socket 210 is fixedly connected with an auxiliary ring 213, and the width of the inner wall end of the auxiliary ring 213 away from the socket 210 is greater than the width of the inner wall end close to the socket 210. By setting the auxiliary ring 213, when the control protrusion 26 moves toward the socket 210, one end of the insertion rod 29 enters the auxiliary ring 213 and can directly slide into the inside of the socket 210. There is no need to accurately align the positions of the socket 210 and the insertion rod 29, which improves the convenience when using the protective device 2.

[0044] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, in this embodiment: the interior of the handle 4 is provided with an auxiliary device 3 that can further lock the position of the control button 5 when the handle 4 is held to use the torque wrench. The auxiliary device 3 includes two round rods 31, and the two round rods 31 slide on the inner wall of the handle 4. One end of the two round rods 31 is located on one side of the sliding frame 23, and one end of the two round rods 31 is fixedly connected to a trapezoidal block 32. Third sliding grooves 35 are provided on both sides of the interior of the handle 4, and a push rod 33 is slidably connected to the inner wall of the third sliding groove 35. The edge of one end of the push rod 33 is an inclined surface, and the inclined surfaces of the surfaces of the two push rods 33 fit the inclined surfaces of the outer surface of the trapezoidal block 32. The outer surface of the push rod 33 is provided with two third springs 34, and the third spring 34 is installed in the interior of the third sliding groove 35 to limit the position of the push rod 33. When using the torque wrench, the outer surface of the handle 4 is held to make When force is applied, the two push rods 33 inside the handle 4 will be pressed to slide towards the inside of the third sliding groove 35 and compress the third spring 34. At the same time, one end of the push rod 33 will move to one side of the trapezoidal block 32, pushing the trapezoidal block 32 to drive the round rod 31 to slide in the direction of the sliding frame 23, so that one end of the round rod 31 is attached to the surface of the sliding frame 23. In the process of holding the handle 4, the position of the sliding frame 23 is further restricted, and it is avoided as much as possible that the protruding rod 26 is accidentally touched during use, causing the sliding frame 23 to move and unlock the control button 5, further improving the stability of using the protective device 2. After releasing the push rods 33 on both sides of the handle 4, the third spring 34 returns to its original state and pushes the push rod 33 to move outward back to its original position. When the protective device 2 pushes the protruding rod 26 to control the movement of the sliding frame 23, it pushes the round rod 31 to make the round rod 31 and the trapezoidal block 32 return to their original positions.

[0045] Through the optimized design of adding the auxiliary device 3 inside the handle 4, the secondary locking of the position of the control button 5 is achieved, which effectively prevents the control button from being accidentally touched due to unstable hands or external disturbances during operation, thereby causing misadjustment of the torque parameters. At the same time, when the parameters need to be adjusted, the locked state can be quickly released to achieve sensitive operation, greatly reducing the safety risks and assembly errors caused by misoperation. The auxiliary mechanism 3 forms an automatic locking and resetting closed-loop system through the organic linkage of the push rod 33, the trapezoidal block 32, the round rod 31 and the third spring 34, ensuring that the internal components can still maintain stable operation under the action of external forces, thereby providing more accurate and reliable guarantees in key processes such as torque conversion, signal acquisition and data transmission.

[0046] Reference Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, in the present embodiment: an auxiliary rod 36 is fixedly connected to one side of the push rod 33, and a plurality of rubber strips are arranged on the side of the auxiliary rod 36 away from the push rod 33. The plurality of rubber strips arranged on the outer surface of the auxiliary rod 36 can increase the friction force when the operator's hand is holding the outer surface of the handle 4 and contacts the surface of the handle 4 and the auxiliary rod 36, making it less likely for the hand to slip when holding the handle 4 and applying force, thereby improving the stability when using the torque wrench.

[0047] Working principle: When using the torque wrench, the head body 7 is mounted on one end of the device body 1. The installation of the head of the digital torque wrench is a well-known operation for those skilled in the art, so it will not be repeated here. Push one side of the protruding rod 26 to control the protruding rod 26 to drive the sliding frame 23 to move in the first sliding groove 22 inside the device body 1, so that the sliding frame 23 slides in the direction away from the control button 5 and compresses the first spring 25. Adjust the protruding block 24 at the top of the sliding frame 23 away from the rectangular block 21 on the outer surface of the control button 5. When the protruding rod 26 moves so that the insertion rod 29 is located on one side of the insertion hole 210, the compressed first spring 25 is pressed against the protruding block 24 at the top of the sliding frame 23. The second spring 28 will push the rod 29 to move in the direction of the socket 210 to insert one end of the rod 29 into the socket 210, fix the position of the protruding rod 26 and the sliding frame 23, adjust the torque unit and torque value of the wrench through the control button 5 on the outer surface of the body 1, and observe the data through the display screen 6. When the adjustment is completed and the torque wrench is used, pull the rod 29 to pull one end of the rod 29 out of the socket 210 and compress the second spring 28, and the first spring 25 inside the body 1 will push the sliding frame 23 and the protruding rod 26 away from the socket 210. The tool 20 is slid in the right and left direction, so that one end of the insertion rod 29 is against the outer surface of the device body 1, and the protrusion 24 at the top of the sliding frame 23 is located below the rectangular block 21 on the outer surface of the control button 5. At this time, when the control button 5 is pressed, the rectangular block 21 on the outer surface of the control button 5 will be blocked by the protrusion 24 and cannot be pressed down normally. Finally, the wrench head on the head body 7 is put on the bolt or nut that needs to be tightened, one hand is held on the outer surface of the device body 1 near the head body 7, and the other hand is held on the outer surface of the handle 4. When the outer surface of the handle 4 is held and force is applied, the two push rods 33 inside the handle 4 are pressed toward the third slide groove 35. The third spring 34 slides internally and compresses. At the same time, one end of the push rod 33 moves on one side of the trapezoidal block 32, pushing the trapezoidal block 32 to drive the round rod 31 to slide in the direction of the sliding frame 23, so that one end of the round rod 31 fits on the surface of the sliding frame 23, pushing the wrench as a whole to rotate slowly, and converting the mechanical stress sensed into an electrical signal through the strain force sensor, and transmitting the data to the display screen 6. During the tightening process, observe the display screen 6 of the digital torque wrench. When the torque value reaches the set value, stop applying force and pull the head body 7 out away from the outer surface of the bolt or nut.

[0048] The digital torque wrench described in the present application optimizes the internal protection structure design of the digital torque wrench, organically combines the protection device 2, the sliding mechanism and the auxiliary device 3, thereby realizing automatic locking and precise release of the control button 5 during actual use. This not only effectively prevents the misadjustment of parameters due to accidental touching of the control button 5 due to involuntary hand movement or external interference when applying torque, but also enables the locking state to be released with simple operations when parameters need to be adjusted, thereby realizing fast and precise parameter modification. The digital torque wrench described in the present application has a first slide groove 22, a sliding frame 23, a protruding rod 26, an inserting rod 29 and a plurality of springs reasonably arranged inside the body 1, and realizes automatic conversion during adjustment and use by utilizing the coordinated movement between the various parts, so that the sliding frame 23 can move smoothly and compress the corresponding spring under the drive of the protruding rod 26, so that the control button 5 is always in a predetermined protection position, effectively avoiding the torque value deviation and the problem of loose tightening of the workpiece caused by accidental touch, and at the same time, by adding a rectangular block 21 and an auxiliary ring 213 to the outside of the body 1 to assist in fixing and guiding the position of the protruding rod 26 and the inserting rod 29, the effect of automatic adsorption and locking without precise alignment during operation is achieved; the auxiliary device 3 arranged inside the handle 4 utilizes the mutual cooperation of the round rod 31, the trapezoidal block 32 and the push rod 33 to automatically push the protective structure 2 closer to the control button 5 during the operator's force gripping process, thereby enhancing the stability during gripping and the safety performance of the overall wrench. This design not only makes torque adjustment and display more intuitive and easy to operate, but also greatly improves the application reliability in high-precision assembly fields such as automobile, aerospace and mechanical manufacturing.

[0049] The digital torque wrench described in the present application has a compact overall structure and reasonable connections between components, which extends the service life of the equipment and reduces maintenance costs. At the same time, a sealing sheet 212 is used to cover the second slide groove 27, which effectively prevents dust and oil from entering the internal mechanism and keeps the internal environment clean, so that the wrench can maintain high precision and high stability under various harsh working conditions, and is safe and reliable to use and easy to operate.

[0050] The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A digital torque wrench, comprising a body (1), characterized in that: The outer surface of the device body (1) is provided with a plurality of control buttons (5) and a display screen (6); a strain sensor for sensing mechanical stress is provided inside the device body (1); a handle (4) for holding the torque wrench as a whole is fixedly connected to one end of the device body (1); a head body (7) is sleeved and mounted on one end of the device body (1) away from the handle (4); and a protective device (2) for preventing the control button (5) from being accidentally touched when the torque wrench is used is provided inside the device body (1).

2. The digital torque wrench according to claim 1, characterized in that: The protective device (2) comprises a plurality of rectangular blocks (21) fixedly connected to the control button (5); a first sliding groove (22) is provided inside the device body (1); a sliding frame (23) is slidably connected inside the first sliding groove (22); a plurality of protrusions (24) are arranged on the upper surface of the sliding frame (23); a first spring (25) is provided on one side of the sliding frame (23); the first spring (25) is fixed inside the device body (1) and is used to limit the position of the sliding frame (23) inside the first sliding groove (22); a convex rod (26) is fixedly connected on one side of the sliding frame (23); a second sliding groove (27) is provided on one side of the device body (1); the convex rod (26) slides on the inner wall of the second sliding groove (27); the convex rod (26) adjusts the protrusion (24) on the sliding frame (23) to slide to the position below the rectangular block (21) on the outer surface of the control button (5) so as to be locked; at this time, the control button (5) cannot be pressed down normally.

3. The digital torque wrench according to claim 2, characterized in that: One end of the protruding rod (26) protrudes from the outer surface of the device body (1), and a second spring (28) and an insertion rod (29) are provided on the outer surface of the protruding rod (26). The insertion rod (29) is installed on the outer surface of the protruding rod (26) through the second spring (28) and slides on the inner wall of the protruding rod (26). When the protruding block (24) on the outer surface of the sliding frame (23) is located below the rectangular block (21) on the outer surface of the control button (5), one end of the insertion rod (29) abuts against one side of the outer surface of the device body (1) and the second spring (28) is in a compressed state. A plug hole (210) is provided on the outer surface of the device body (1) near the insertion rod (29).

4. The digital torque wrench according to claim 3, characterized in that: One end of the insertion rod (29) away from the sliding frame (23) is fixedly connected to a slot block (211), and arc-shaped grooves are formed on the upper and lower sides of the slot block (211).

5. The digital torque wrench according to claim 4, characterized in that: A sealing sheet (212) is fixedly connected to the outer surface of the protruding rod (26), one side of the sealing sheet (212) is attached to the outer surface of the device body (1), and the length of the sealing sheet (212) is at least twice the length of the second sliding groove (27).

6. The digital torque wrench according to claim 5, characterized in that: An auxiliary ring (213) is fixedly connected to one end of the inner wall of the insertion hole (210), and the width of the inner wall of the auxiliary ring (213) at one end away from the insertion hole (210) is greater than the width of the inner wall at one end close to the insertion hole (210).

7. The digital torque wrench according to claim 6, characterized in that: An auxiliary device (3) is arranged inside the handle (4), and the auxiliary device (3) can lock the position of the control button (5) when the handle (4) is held and a torque wrench is used.

8. The digital torque wrench according to claim 7, characterized in that: The auxiliary device (3) comprises two round rods (31), which slide on the inner wall of the handle (4), one end of the two round rods (31) is located on one side of the sliding frame (23), one end of the two round rods (31) is fixedly connected with a trapezoidal block (32), the inner sides of the handle (4) are provided with a third sliding groove (35), the inner wall of the third sliding groove (35) is slidably connected with a push rod (33), one end edge of the push rod (33) is an inclined surface, the inclined surfaces of the surfaces of the two push rods (33) are in contact with the inclined surfaces of the outer surface of the trapezoidal block (32), and the outer surface of the push rod (33) is provided with two third springs (34), which are installed inside the third sliding groove (35) to limit the position of the push rod (33).

9. The digital torque wrench according to claim 8, characterized in that: One side of the push rod (33) is fixedly connected to an auxiliary rod (36), and a side of the auxiliary rod (36) away from the push rod (33) is provided with a plurality of rubber strips.

10. A method for operating a digital torque wrench, characterized in that: The digital torque wrench according to any one of claims 1 to 9 is used, comprising the following steps: S1, mounting the head body (7) on the head of the digital torque wrench at one end of the body (1); S2, adjusting the torque unit and torque value of the wrench through the control button (5) on the outer surface of the device body (1); S3, one end of the insertion rod (29) is pressed against the outer surface of the device body (1), and the protrusion (24) at the top of the sliding frame (23) is located below the rectangular block (21) on the outer surface of the control button (5); S4. Put the spanner head on the head body (7) onto the bolt or nut to be tightened.

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