High-precision digital torque wrench

Abstract

This disclosure provides a high-precision digital torque wrench, comprising a body, an actuating device, a torque release device, a spring element, a torque control device, a fine-tuning device, and a torque sensing device. The actuating device is pivotally mounted on the body, the torque release device is pivotally mounted within the body and selectively abuts against the actuating device, one end of the spring element is fixed to the torque release device, the sliding seat of the torque control device can slide along an axis parallel to the body, and the fine-tuning device is disposed on the sliding seat. The fine-tuning device includes a support member against which the other end of the spring element abuts and a fine-tuning member. The fine-tuning member can finely adjust the support member to finely adjust the force exerted by the torque release device against the actuating device. The torque sensing device displays the torque setting value based on the displacement change of the sliding seat.

Description

Technical Field

[0001] This disclosure relates to a torque wrench, and more particularly to a high-precision digital torque wrench. Prior Technology

[0002] Note that U.S. Patent Publication No. 11,279,009B2, "Torque wrench," discloses a torque wrench. This torque wrench is a digitally displayed torque setting, comprising a body, a drive unit, a release mechanism, a torque assembly, and an adjustment assembly. The torque assembly has a biasing member and a stop member. The adjustment assembly includes a limiting member, an adjusting member, and a sliding member. The limiting member abuts against the biasing member. The sliding member is fixed to and slidably disposed within the body, and the adjusting member can adjust the sliding member to adjust the relative position of the limiting member abutting against the biasing member. When the torque applied to the drive unit exceeds the preset torque setting of the torque wrench, the release mechanism and the stop member release, thereby indicating to the user that the preset torque setting for fastening the fastener has been reached.

[0003] However, the aforementioned torque wrench has a guide slot (slit) on its base to restrict the movement of the sliding component. The axial length of this slot directly determines the maximum stroke of the sliding component, thus limiting the torque adjustment range. Furthermore, in actual manufacturing, the machining accuracy of the guide slot (slit) and the assembly tolerances of related components affect the accuracy of the torque value, making precise calibration difficult before the product leaves the factory. These limitations prevent the torque wrench from fully meeting the stringent requirements of relevant fields for high-precision torque tools. Summary of the Invention

[0004] To address the aforementioned issues, this disclosure provides a high-precision digital torque wrench that utilizes a fine-tuning device to precisely adjust the force exerted by the torque release device against the wrench, thereby accurately adjusting the torque setting value. This allows the digital torque wrench to be precisely adjusted to a predetermined torque range before leaving the factory, thus meeting the requirements for using high-precision tools.

[0005] To achieve the above objectives, this disclosure provides a high-precision digital torque wrench in one embodiment, comprising a body, an actuating device, a torque release device, a spring element, a torque control device, a fine-tuning device, and a torque sensing device. The body forms a first end and a second end away from the first end along an axis, with a receiving space between the first and second ends; the actuating device is pivotally disposed at the first end, and includes an actuating end exposed in the body; the torque release device is pivotally disposed in the receiving space and can selectively abut against the end of the actuating device away from the actuating end; the spring element is disposed in the receiving space in a manner not parallel to the axis, and includes a fixed end and a contact section different from the fixed end, the fixed end being fixed to the torque release device; the torque control device assembly... As part of the main body, the torque control device has a sliding seat, which is located in the accommodating space and can slide in a direction parallel to the axis; a fine-tuning device is located on the sliding seat, which includes a support member against which the contact section of the elastic member abuts and a fine-tuning member, which can finely adjust the support member to finely adjust the force of the torque release device against the lever device; a torque sensing device is located on the main body relative to the torque control device, and the torque sensing device displays a torque setting value based on the displacement change of the sliding seat.

[0006] Therefore, this invention discloses a method to finely adjust the torque release device against the lever mechanism using a fine-tuning device, thereby adjusting the accuracy of the torque setting value. This effectively avoids torque value deviations caused by manufacturing tolerances, assembly errors, and other factors, ensuring that the torque setting of the wrench can reach a low error range and providing consumers with high-precision wrench products. Simple Explanation of the Diagram

[0007] [Figure 1] is a schematic diagram of the appearance of an embodiment of the high-precision digital torque wrench disclosed herein. [Figure 2] is an exploded view of an embodiment of the high-precision digital torque wrench disclosed herein. [Figure 3] is a cross-sectional view taken along the AA section line of Figure 1, showing that the lever and the body are indirectly in contact by a plurality of contact elements. [Figure 4] is a partial cross-sectional view taken along the BB section line of Figure 1, showing the locking device in the locked position. [Figure 5] is a partial cross-sectional view taken along the CC section line of Figure 1, showing the position of the sliding seat away from the stop and the torque setting value is set to the minimum. [Figure 6] is a partially enlarged schematic diagram of Figure 5. [Figure 7] is a continuation of Figure 5 and is a schematic diagram of the turning action of an embodiment of the high-precision digital torque wrench disclosed herein, showing that the release member and the pressing member are in a jumping state. [Figure 8] is a partial longitudinal cross-sectional schematic diagram of the digital torque wrench disclosed herein, showing the locking device in the released position. [Figure 9] is a partial cross-sectional schematic diagram of the digital torque wrench disclosed herein, showing the position of the sliding seat against the stop member, and the torque setting value is set to a large value. Implementation

[0008] The exemplary embodiments of this disclosure are described in detail below with reference to the accompanying drawings. It is not intended to limit the technical principles of this disclosure to the specific disclosed embodiments, but the scope of this disclosure is limited only by the scope of the claims and covers alternatives, modifications and equivalents.

[0009] Please refer to Figures 1 to 9, which are embodiments of a high-precision digital torque wrench 100 disclosed herein, which includes a body 1, a levering device 2, a torque release device 3, a spring element 4, a torque regulating device 5, a fine-tuning device 6, a locking device 7, and a torque sensing device 8.

[0010] The body 1, made of aluminum alloy, has a first end 10 and a second end 11 formed along an axis L1, dividing the body 1 into a forward side LF and a reverse side LR. A receiving space 12 exists between the first end 10 and the second end 11. The body 1 is a flat rectangular hollow tube, and a guide portion 121 is provided within the receiving space 12. A first pivot hole 13, a second pivot hole 14, and a third pivot hole 15 are sequentially provided from the first end 10 toward the second end 11, all communicating with the receiving space 12. Additionally, an elongated sensing hole 16 is provided near the second end 11, communicating with the receiving space 12. The receiving space 12 has an inner wall 122, with a first inner wall 122a on the reverse side LR and a second inner wall 122b on the forward side LF.

[0011] The lever 2 is oscillatingly disposed at the first end 10 of the main body 1, and the lever 2 has a lever end 2a exposed outside the main body 1. The lever end 2a has a rotation axis L2. When the digital torque wrench 100 is operated, the main body 1 can rotate around the rotation axis L2 to turn the fastener. The rotation axis L2 is perpendicular to the axis L1.

[0012] In this disclosed embodiment, the lever device 2 includes a lever 20, a connecting rod 21, an actuating member 22, and a pressing member 23. The lever 20 has a fourth pivot hole 201, through which a first pin 24 passes through the first pivot hole 13 and the fourth pivot hole 201, and a first bushing 241 is fitted at both ends, so that the lever 20 is pivotally mounted on the first end 10 of the body 1. The lever 20 has the aforementioned lever end 2a and a tail end 202 extending into the receiving space 12 away from the lever end 2a. Please refer to Figures 2 and 3. The tail end 202 has a first surface 203 and a second surface 204 arranged oppositely. Each of the first surface 203 and the second surface 204 has a contact element 205 embedded in it, which is arranged along the axis L1. The contact element 205 can contact the inner wall 122. In this way, during the operation of the digital torque wrench 100, the contact element 205 contacts the inner wall 122, thereby avoiding the wrench element 20 from directly rubbing against the body 1. This has the effect of straightening the wrench element 20 and preventing the wrench element 20 from rubbing against the body 1 and causing errors in torque accuracy. The contact element 205 is rod-shaped, and there are two on the first surface 203 and two on the second surface 204.

[0013] One side of the lever 20 is provided with an elastic element 206, which is used to abut against the first inner wall 122a to provide the lever 20 with the force to return to the normal state.

[0014] Link 21 is pivotally mounted between the tail end 202 and the actuator 22. One end of link 21 has a first connecting hole 211 and the other end has a second connecting hole 212. A fixing pin 213 passes through the through hole 207 in the tail end 202 and the first connecting hole 211, pivotally mounting one end of link 21 to the tail end 202. A fixing pin 214 passes through the second connecting hole 212 and the through hole 220 in the actuator 22, pivotally mounting the other end of link 21 to the actuator 22.

[0015] The actuator 22 has a fifth pivot hole 221 next to the through hole 220. A second pin 25 passes through the second pivot hole 14 and the fifth pivot hole 221, and a second bushing 251 is fitted at both ends, so that the actuator 22 is pivotally mounted on the body 1 and can be linked with the connecting rod 21. A pressing member 23 is pivotally mounted on the actuator 22 away from the actuating end 2a and the connecting rod 21. A stop wall 222 is provided on one side of the pressing member 23 to limit the swing range of the pressing member 23.

[0016] The pressing member 23 has a through hole 231 and is pivotally mounted on the through hole 223 of the actuator 22 and the through hole 231 of the pressing member 23 by means of a fixing pin 232, so that the pressing member 23 pivots on the actuator 22. The pressing member 23 is provided with a first abutting part 233.

[0017] The torque release device 3 is pivotally mounted within the accommodating space 12 of the main body 1 and can selectively abut against the pressing member 23 of the actuating device 2 away from the actuating end 2a. In this disclosed embodiment, the torque release device 3 includes a release member 30. The release member 30 has a sixth pivot hole 31, through which a third pin 32 passes between the third pivot hole 15 and the sixth pivot hole 31, and a third bushing 321 is fitted at both ends, so that the release member 30 is pivotally mounted on the main body 1 and abuts against the pressing member 23. The release member 30 also has a fixing hole 33.

[0018] When the applied force of the digital torque wrench 100 increases continuously until it equals the torque setting value, the release member 30 can disengage from the pressing member 23 to interrupt the applied force of the digital torque wrench 100 (as shown in Figure 7). When the digital torque wrench 100 returns to its normal state, the release member 30 and the pressing member 23 can automatically return to their original contact state (as shown in Figure 5). In this embodiment of the invention, the release member 30 has a second contact portion 34 on the side opposite to the elastic member 4, which is used to abut against the first contact portion 233 of the pressing member 23. In addition, the actuating device 2 further includes a reset member 26, which is disposed between the actuating member 22 and the pressing member 23. The reset member 26 is a spring, which normally keeps the pressing member 23 and the release member 30 of the torque release device 3 in contact.

[0019] In this disclosed embodiment, a first steel ring 27 is provided between the first bushing 241 and the first pivot hole 13, a second steel ring 28 is provided between the second bushing 251 and the second pivot hole 14, and a third steel ring 29 is provided between the third bushing 321 and the third pivot hole 15. By adding the first steel ring 27, the second steel ring 28, and the third steel ring 29, it is possible to avoid the first pivot hole 13, the second pivot hole 14, and the third pivot hole 15 of the body 1 from expanding during use, thereby preventing the corresponding components from becoming unstable and resulting in torque accuracy errors.

[0020] Referring to Figure 2 and Figure 5, the elastic member 4 is disposed in the accommodating space 12 in a manner not parallel to the axis L1. In some embodiments, the elastic member 4 is a rod-shaped object with different shapes at both ends. The elastic member 4 is disposed in the accommodating space 12 at an inclination relative to the axis L1, and the elastic member 4 includes a fixed end 41 and a contact section 42 different from the fixed end 41. The contact section 42 can cross the axis L1 of the body 1, and the fixed end 41 passes through the fixing hole 33 fixed to the release member 30. In the embodiment disclosed herein, there is a resistance sleeve 43 between the fixed end 41 and the fixing hole 33. The resistance sleeve 43 can disperse the shear stress generated when the elastic member 4 moves, effectively increasing the life of the elastic member 4 by more than 2 times.

[0021] The torque control device 5 is assembled with the main body 1. The torque control device 5 has a sliding seat 50 and a first force transmission member 51. The sliding seat 50 is disposed in the guide part 121 of the accommodating space 12 and can slide along a direction parallel to the axis L1. The sliding seat 50 is frame-shaped, and the first force transmission member 51 can drive the sliding seat 50 to produce displacement.

[0022] A fine-tuning device 6 is disposed on the sliding seat 50. The fine-tuning device 6 includes a support member 60 against which the contact section 42 of the elastic member 4 abuts, and a fine-tuning member 61. The fine-tuning member 61 can finely adjust the support member 60 to finely adjust the force of the torque release device 3 against the lever device 2. Furthermore, when the fine-tuning member 61 causes a larger tilt of the elastic member 4 relative to the axis L1, the force of the release member 30 against the pressing member 23 is larger, and when the fine-tuning member 61 causes a smaller tilt of the elastic member 4 relative to the axis L1, the force of the release member 30 against the pressing member 23 is smaller. In this way, the predetermined torque setting value can be accurately corrected.

[0023] Referring to Figure 2 and in conjunction with Figures 5 and 6, the fine-tuning device 6 further includes a fixed base 62, which is secured inside the sliding base 50. The fixed base 62 has a through portion 621 and a groove 622 communicating with the through portion 621. The through portion 621 allows the contact section 42 of the elastic member 4 to pass through. The support member 60 slides in the groove 622 along a direction perpendicular to the axis L1 to abut against the contact section 42. The fixed base 62 further includes a screw hole 623 communicating with the through portion 621 and the groove 622. The support member 60 has an arc-shaped abutment surface 601 that contacts the contact section 42 and a flat surface 602 that is oppositely arranged and abuts against the fine-tuning member 61. The fine-tuning member 61 has a threaded portion 611 screwed into the screw hole 623, so that one end of the fine-tuning member 61 is rotatably mounted on the fixed base 62, and the other end of the fine-tuning member 61 abuts against the flat surface 602 of the support member 60. Therefore, when the fine-tuning component 61 causes the bearing component 60 to shift, it changes the contact force between the second abutment portion 34 of the release component 30 and the first abutment portion 233 of the pressing component 23, thereby adjusting the accuracy of the torque setting value of the digital torque wrench 100. Furthermore, an adjustment hole 18 is provided on one side of the body 1, communicating with the receiving space 12. When the fine-tuning component 61 is aligned with the adjustment hole 18, a tool is allowed to be inserted into the receiving space 12, allowing the fine-tuning component 61 to be rotated and adjusted. Since the fine-tuning device 6 is positioned far from the torque release device 3, it avoids direct contact with the reaction force of the digital torque wrench 100, thus preventing damage and extending its service life.

[0024] In one embodiment disclosed herein, a stop 17 is provided in the accommodating space 12 along the displacement path of the sliding seat 50. The stop 17 is an elastic body. The stop 17 is fixed to the body 1 along a direction perpendicular to the axis L1. The contact section 42 of the elastic member 4 has a shape that is thinner at both ends and thicker in the middle, which makes the torque / distance curve of the digital torque wrench 100 nearly linear, thus improving torque accuracy. The two ends of the contact section 42 have a first curved contact position 421 and a second curved contact position 422. When the sliding seat 50 is away from the stop 17, the torque setting value is minimized when the bearing member 60 abuts against the first curved contact position 421. When the sliding seat 50 is close to and contacts the stop 17, the torque setting value is maximized when the bearing member 60 abuts against the second curved contact position 422. The stop 17 prevents unnecessary displacement of the slide block 50 during high-torque operation, thereby achieving high-precision torque performance.

[0025] Locking device 7 is assembled between sliding seat 50 and body 1. Locking device 7 can switch between a released position and a locked position. As shown in Figures 8 and 9 and in conjunction with Figure 2, in the released position, the user can rotate the sliding seat 50 along an operating axis L3 that is parallel to the rotation axis L2 and perpendicular to the axis L1, so that the sliding seat 50 can drive the support member 60 to move relative to the elastic member 4. As shown in Figures 4 and 5 and in conjunction with Figure 2, in the locked position, locking device 7 creates frictional resistance between sliding seat 50 and body 1, thereby clamping sliding seat 50 and body 1, preventing sliding seat 50 from moving relative to body 1. In this way, locking body 1 and sliding seat 50 through locking device 7 makes the structure more compact, so that the wrench will not produce micro-movement during the application of force, making the torque performance more accurate and achieving the effect of torque without distortion.

[0026] In this disclosed embodiment, the body 1 has a top side 1a and a bottom side 1b arranged oppositely along the operating axis L3. The locking device 7 includes a shaft 70 extending through the body 1 and the sliding seat 50 along the operating axis L3, an operating handle 71 pivotally disposed at one end of the shaft 70, and a second force transmission member 72 disposed on the shaft 70. The shaft 70 protrudes from the body 1 from the bottom side 1b for pivoting the operating handle 71.

[0027] The operating handle 71 has an eccentric cam 711 pivotally mounted on the end of the shaft 70, allowing the user to selectively pivot the operating handle 71 relative to the shaft 70, so that the operating handle 71 drives the shaft 70 to move along the operating axis L3.

[0028] The sliding seat 50 has a first tooth 501 arranged along the parallel axis L1, and the sliding seat 50 has an insertion hole 502 away from the first tooth 501. The first force transmission member 51 has a second tooth 511 arranged around the operating axis L3, and the second tooth 511 meshes with the first tooth 501. The first force transmission member 51 and the second force transmission member 72 are slidably connected and allow the shaft 70 to pass through.

[0029] Furthermore, in the locked position, the operating handle 71 pulls the shaft 70 along the operating axis L3, causing the first force transmission member 51 and the second force transmission member 72 to press against each other respectively. The first force transmission member 51 presses against the body 1, and the second force transmission member 72 is pressed against the sliding seat 50 by the force applied by the eccentric cam 711, thereby clamping the body 1 and the sliding seat 50. In the released position, the operating handle 71 is released relative to the shaft 70, allowing the user to rotate the first force transmission member 51 to drive the sliding seat 50 to slide linearly relative to the body 1, achieving the effect of quickly adjusting the torque setting value to the upper or lower limit.

[0030] Furthermore, a screw 701 is screwed onto one end of the shaft 70 extending through the first force transmission member 51. A spring 73 is located between the screw 701 and the first force transmission member 51, and the spring 73 has the effect of absorbing vibration. In this disclosed embodiment, a biasing spring 9 is further included, which is embedded in the side of the sliding seat 50 to abut against the receiving space 12, in order to eliminate the clearance between the sliding seat 50 and the body 1.

[0031] As shown in Figure 7 and in conjunction with Figure 2, when the applied force of the digital torque wrench 100 continues to rise until it equals the torque setting value, the release member 30 can disengage from the pressing member 23 to interrupt the applied force of the digital torque wrench 100. This causes the actuator 22 to move relative to the body 1 by connecting the linkage 21, causing the wrench 20 to strike the first inner wall 122a and the actuator 22 to strike the second inner wall 122b. When the digital torque wrench 100 returns to its normal state, the release member 30 and the pressing member 23 can automatically return to their original contact state, thereby providing the user with a clear mechanical torque release feel when turning the wrench, thus prompting the user to stop applying force.

[0032] A torque sensing device 8 is disposed on the main body 1 relative to the torque control device 5. The torque sensing device 8 displays a torque setting value based on the displacement change of the sliding seat 50. The torque sensing device 8 includes a sensing element 80, a display 81, and a battery 82 electrically connected to the sensing element 80 and the display 81. The display 81 is electrically connected to the sensing element 80. The sensing element 80 is a variable resistor and has a movable part 801. The movable part 801 is disposed in the socket 502 of the sliding seat 50 and moves with it. The sensing element 80 can sense the displacement change of the sliding seat 50 through the sensing hole 16 and generate a torque signal. The display 81 displays the torque setting value based on the torque signal.

[0033] In this disclosed embodiment, a protective cover 101 is further provided on the bottom side 1b to cover the periphery of the operating handle 71, preventing accidental external contact with the operating handle 71 and passive pivoting. The body 1 further includes a grip 102 connected to the protective cover 101 and sleeved on the second end 11 of the body 1. After leaving the factory, the protective cover 101 covers the aforementioned adjustment hole 18.

[0034] This disclosure further includes an elastic device S, which includes a spring S1 and a bolt S2. The bolt S2 is screwed onto the release member 30 and abuts against the resistance member 43. One end of the spring S1 is connected to the bolt S2, and the other end abuts against the second inner wall 122b of the inner wall 12. The spring S1 enables the contact section 42 of the elastic member 4 to remain in constant contact with the support member 60.

[0035] In summary, this disclosure has the following advantages:

[0036] 1. This disclosure utilizes the fine-tuning device 6 to fine-tune the force of the torque release device 3 against the lever device 2, thereby fine-tuning the force of the release member 30 against the pressing member 23, thereby adjusting the accuracy of the torque setting value of the digital torque wrench 100, ensuring that the torque variation of the torque setting value of the digital torque wrench 100 is reduced and a low error range is achieved.

[0037] 2. This invention discloses that when the maximum torque value is set, the stop member 17 restricts the displacement of the stop slide 50, which helps to prevent the slide 50 from displacing during high torque operation, thereby achieving high-precision torque performance.

[0038] The embodiments described above are merely illustrative of the present invention and are not intended to limit the scope of the invention. All modifications or alterations made without departing from the spirit of the present invention are within the scope of the patent applications of this invention.

[0039] 100: Digital Torque Wrench 1: Ontology 1a: Top side 1b: Bottom side 101: Protective Cover 102: Grip 10: First end 11: Second end 12: Storage space 121: Guidance Department 122: Inner wall 122a: First inner wall 122b: Second inner wall 13: First pivot hole 14: Second pivot hole 15: Third pivot hole 16: Sensing hole 17: Stop component 18: Adjustment hole 2: Triggering device 2a: Actuating end 20: Trigger 201: Fourth pivot hole 202: Tail End 203: First Page 204: Second page 205: Contact element 206: Elastic component 207: Perforation 21: Linkage 211: First connecting hole 212: Second connecting hole 213: Fixed pin 214: Fixed pin 22: Actuator 220: Perforation 221: Fifth pivot hole 222: Stop wall 223: Perforation 23: Pressing component 231: Perforation 232: Fixed pin 233: First contact section 24: First pin 241: First Bushing 25: Second pin 251: Second bushing 26: Reset component 27: First steel ring 28: Second steel ring 29: Third steel ring 3: Torque release device 30: Release document 31: Sixth pivot hole 32: Third pin 321: Third Bushing 33: Fixing hole 34: Second contact section 4: Elastic components 41: Fixed end 42: Contact section 421: First curve contact position 422: Second curve contact position 43: Resistance Kit 5: Torque control device 50: Sliding seat 501: First tooth 502: Socket 51: First force transmission component 511: Second tooth 6: Fine-tuning device 60: Supporting component 601: Curved contact surface 602: Plane 61: Fine-tuning parts 611: Threaded section 62: Fixed base 621: Penetrating part 622: Slide 623: Screw hole 7: Locking device 70: Shaft 701: Screws 71: Operating handle 711: Eccentric Cam 72: Second force transmission component 73: Spring 8: Torque sensing device 80: Sensing device 801: Movable Part 81: Monitor 82: Battery 9: Biased Spring S: Elastic device S1: Spring S2: Bolt LF: Forward side LR: Reverse side L1: Axis L2: Rotation axis L3: Operating axis

Claims

1. A high-precision digital torque wrench, comprising: A body having a first end and a second end away from the first end along an axis, with an accommodating space between the first end and the second end; a lever mechanism pivotally disposed at the first end, the lever mechanism including a lever end exposed in the body; a torque release mechanism pivotally disposed in the accommodating space and selectively abutting the end of the lever mechanism away from the lever end; a spring member disposed in the accommodating space in a manner not parallel to the axis, the spring member including a fixed end and a contact section different from the fixed end, the fixed end being fixed to the torque release mechanism; and a torque regulating device assembled to the body, the torque regulating device having a sliding seat disposed in the accommodating space and capable of sliding in a direction parallel to the axis. A fine-tuning device is disposed on the sliding seat. The fine-tuning device includes a support member against which the contact section of the elastic member abuts and a fine-tuning member. The fine-tuning member can support the support member in a fine-tuning manner to fine-tune the force of the torque release device against the lever device. A torque sensing device is disposed on the body relative to the torque control device. The torque sensing device displays a torque setting value based on the displacement change of the sliding seat.

2. The high-precision digital torque wrench as described in claim 1, wherein, The fine-tuning device further includes a fixed base that is secured inside the sliding base. The fixed base has a through portion and a groove communicating with the through portion. The through portion allows the contact section to pass through. The support member slides in the groove along a direction perpendicular to the axis to abut against the contact section. One end of the fine-tuning member is rotatably mounted on the fixed base, and the other end of the fine-tuning member abuts against the support member.

3. The high-precision digital torque wrench as described in claim 2, wherein, The fixed base has a screw hole connecting the through part and the slide groove. The fine-tuning part has a threaded part screwed into the screw hole. The bearing part has an arc-shaped abutment surface that contacts the contact section and a flat surface that is oppositely arranged and allows the fine-tuning part to abut. An adjustment hole is provided on one side of the body that connects to the accommodating space. When the fine-tuning part is aligned with the adjustment hole, the fine-tuning part can be rotated and adjusted.

4. The high-precision digital torque wrench as described in claim 1, wherein, The accommodating space has a stop on the sliding seat's movement path; the elastic member is a rod-shaped object with different shapes at both ends, and the contact section has a shape that is thinner at both ends and thicker in the middle. The two ends of the contact section have a first curved contact position and a second curved contact position. When the sliding seat is away from the stop, the torque setting value is minimized when the support member abuts against the first curved contact position. When the sliding seat is close to the stop, the torque setting value is maximized when the support member abuts against the second curved contact position.

5. The high-precision digital torque wrench as described in claim 4, wherein, The stop is an elastic body, and it is fixed to the body along a direction perpendicular to the axis.

6. A high-precision digital torque wrench as described in claim 1, wherein, The lever device has a pressing member away from the lever end; the torque release device includes a release member, which is pivotally mounted on the body and abuts against the pressing member. The release member has a fixing hole for the fixing end to pass through, and a force-resistant sleeve is provided between the fixing end and the fixing hole.

7. A high-precision digital torque wrench as described in claim 6, wherein, The lever device further includes a lever, a connecting rod, and an actuating member. The lever is pivotally mounted on the first end and has a lever end and a tail end extending into the receiving space. The connecting rod is pivotally mounted between the tail end and the actuating member. The actuating member is pivotally mounted on the body and can be linked with the connecting rod. The actuating member is pivotally mounted on the pressing member away from the connecting rod. The body has an inner wall. The tail end has a first surface and a second surface arranged opposite to each other. The first surface and the second surface are each fitted with a contact member arranged along the axis. These contact members can contact the inner wall. The device further includes an elastic device, which includes a spring and a bolt. The bolt is screwed onto the release member and abuts against the resistance assembly. One end of the spring is connected to the bolt, and the other end of the spring abuts against the inner wall. The spring can keep the contact section of the elastic member in constant contact with the support member.

8. A high-precision digital torque wrench as described in claim 7, wherein, The contact elements are rod-shaped; the body is made of aluminum alloy, and a first pivot hole, a second pivot hole, and a third pivot hole are sequentially provided at the first end of the body towards the second end; the lever has a fourth pivot hole, through which a first pin passes and is fitted with a first bushing at both ends; the actuating element has a fifth pivot hole, through which a second pin passes and is fitted with a second bushing at both ends; the releasing element has a sixth pivot hole, through which a third pin passes and is fitted with a third bushing at both ends; a first steel ring is provided between the first bushing and the first pivot hole, a second steel ring is provided between the second bushing and the second pivot hole, and a third steel ring is provided between the third bushing and the third pivot hole.

9. A high-precision digital torque wrench as described in claim 2, wherein, The lever end has a rotation axis, and the body can rotate around the rotation axis during lever operation. The lever device has a pressing member away from the lever end, and the pressing member has a first abutment portion. The torque release device includes a release member, which is pivotally mounted on the body and abuts against the pressing member. The release member has a second abutment portion on the side opposite to the elastic member, which abuts against the first abutment portion. When the fine-tuning member causes the support member to displace, the contact force of the second abutment portion against the first abutment portion is changed. It also includes a locking device disposed between the sliding seat and the body. The locking device can switch between a released position and a locked position. In the released position, the user can rotate along an operating axis parallel to the rotation axis and perpendicular to the axis, so that the sliding seat can drive the support member to displace relative to the elastic member. In the locked position, the locking device clamps the sliding seat and the body, so that the sliding seat cannot move relative to the body.

10. The high-precision digital torque wrench as described in claim 9, wherein, The main body has a top side and an oppositely arranged bottom side along the operating axis; the sliding seat has a first tooth arranged along a direction parallel to the axis; the torque adjustment device includes a first force transmission member capable of driving the sliding seat to produce displacement, the first force transmission member having a second tooth arranged around the operating axis, the second tooth engaging with the first tooth; the locking device includes a shaft extending through the main body and the sliding seat along the operating axis, an operating handle pivotally disposed at one end of the shaft, and a second force transmission member disposed on the shaft, the shaft protruding from the bottom side of the main body for pivoting the operating handle, the operating handle having an eccentric cam pivotally disposed at the end of the shaft, allowing the user to selectively engage the operating handle. The shaft is pivoted, allowing the operating handle to move the shaft along the operating axis. The first and second force transmission components are slidably connected and the shaft can pass through them. In the locked position, the operating handle pulls the shaft along the operating axis, causing the first and second force transmission components to press against each other. The first force transmission component presses against the body, while the second force transmission component, under the force of the eccentric cam, presses against the sliding seat, clamping the body and the sliding seat. In the released position, the operating handle is relaxed relative to the shaft, allowing the user to rotate the first force transmission component and thus move the sliding seat linearly relative to the body. One end of the shaft is screwed onto the first force transmission component, and a threaded component is screwed onto the shaft. A spring is provided between the screw and the first force transmission member; a biasing spring is also included, embedded in the side of the sliding seat, to abut against the accommodating space; the axis divides the body into a forward side and a reverse side, the body has an inner wall, the inner wall has a first inner wall on the reverse side and a second inner wall on the forward side, the lever device includes a lever, a connecting rod and an actuating member, the lever is pivotally mounted on the first end and has a lever end and a tail end extending into the accommodating space, the connecting rod is pivotally mounted between the tail end and the actuating member, the actuating member is pivotally mounted on the body and can be linked with the connecting rod, and the actuating member is pivotally mounted on the pressing member away from the connecting rod, when the applied force of the digital torque wrench continues to rise until it equals the torque. When the setting value is reached, the release member can disengage from the pressing member to interrupt the force applied by the digital torque wrench, allowing the actuator to move the linkage relative to the body and cause the lever to impact the first inner wall and the second inner wall. When the digital torque wrench returns to normal, the release member and the pressing member can automatically return to their original contact state. A reset member is provided between the actuator and the pressing member, which normally keeps the pressing member and the release member in contact. An elastic member is provided on one side of the lever for abutting against the first inner wall to provide the force for the lever to return to its normal state. An elongated sensing hole is provided near the second end of the body, which communicates with the receiving space.The torque sensing device includes a sensor, a display, and a battery electrically connected to the sensor and the display. The display is electrically connected to the sensor. The sensor is a variable resistor and has a movable part. The movable part is disposed on the sliding seat and moves with it. The sensor can sense the displacement change of the sliding seat through the sensing hole and generate a torque signal. The display shows the torque setting value based on the torque signal. It also includes a protective cover disposed on the bottom side to cover the periphery of the operating handle. The main body further includes a grip connected to the protective cover and fitted onto the second end.

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