Quick-adjust torque wrench

Abstract

This invention relates to a quick-adjustable torque wrench, comprising: a main body, a torque release mechanism, a torque adjustment unit, and a cover assembly. The main body includes a drive head, a shaft, and a handle. The drive head and the handle are respectively disposed at opposite ends of the shaft. The shaft encloses an internal space, and the shaft has a first through hole and a second through hole communicating with the internal space. The torque release mechanism includes a long rod, a short rod, and a release element. The long rod and the short rod are respectively connected to the drive head. The release element is disposed on the long rod and detachably abuts against the short rod. When the long rod and the short rod are subjected to torque and deflect to a predetermined degree, the release element releases the short rod. The torque adjustment unit includes an adjustment member, a plurality of first locking teeth, and a plurality of second locking teeth. The adjustment member includes a head and a body connected together. The body is rotatably passed through the first through hole and screwed into the screw hole. The head is located outside the rod body. The plurality of first locking teeth are located on the head, and the plurality of second locking teeth are located on an outer side wall of the rod body. The plurality of first locking teeth and the plurality of second locking teeth are arranged face-to-face and mesh with each other in the opening direction of the first through hole. The cover assembly includes a cover and a spring. One end of the spring is inserted into the adjustment member, and the other end passes through the second through hole. The cover is pivotally connected to the other end of the spring, and the cover can selectively cover the head of the adjustment member.

Description

Technical Field

[0001] This invention relates to hand tools, and in particular to a quick-adjusting torque wrench. Prior Technology

[0002] Wrenches are common hand tools widely used for tightening screws and nuts. Torque wrenches, in particular, are tools with a set upper torque limit. When the applied torque reaches the predetermined value, they trigger a tripping, slippage, or other warning mechanism to prevent over-tightening and damage to the workpiece. They are commonly used in automotive repair, mechanical assembly, and the installation of precision equipment. To adjust the torque setting, most wrenches are designed with a rotatable adjustment element on the rod. This adjustment element is screwed to the long rod, and rotating it changes the initial deflection of the long rod, thereby changing the tripping threshold torque value.

[0003] To prevent the adjusting component from rotating due to unexpected external forces, a protective cover is traditionally installed on the outside of the adjusting component. Some manufacturers have a second locking tooth on the protective cover that can engage with the first locking tooth on the adjusting component to achieve a locking function.

[0004] However, traditional covers with locking teeth are susceptible to opening or misalignment due to external forces. Furthermore, because the cover covers the adjustment mechanism by swinging or sliding, their locking strength is insufficient, potentially leading to detachment or displacement during use, thus affecting the accuracy of the torque value. Moreover, the locking teeth on the cover are often exposed, making them prone to wear and dirt accumulation, further reducing service life and reliability.

[0005] Therefore, it is necessary to provide a novel and advanced quick-adjustment torque wrench to solve the above problems. Summary of the Invention

[0006] The main objective of this invention is to provide a quick-adjustment torque wrench that allows for rapid adjustment of the trip torque value via an adjustment mechanism. Furthermore, the adjustment mechanism is stably positioned by the interlocking of a plurality of first and second locking teeth to prevent accidental rotation, thereby improving efficiency and operational accuracy. This invention is suitable for work scenarios requiring frequent torque adjustments.

[0007] To achieve the above objectives, the present invention provides a quick-adjustable torque wrench, comprising: a main body, a torque release mechanism, a torque adjustment unit, and a cover assembly. The main body includes a drive head, a rod body, and a handle. The drive head and the handle are located at opposite ends of the rod body. The rod body encloses an internal space, and has a first through hole and a second through hole communicating with the internal space. The torque-driven release mechanism includes a long rod, a short rod, a release component, a support component, and a spring. One end of the long rod is connected to the drive head, and the other end extends into the internal space. The long rod has a screw hole. One end of the short rod is connected to the drive head, and the other end extends into the internal space. The short rod has a stop portion. The release component includes a pivot portion and a support portion connected together. The pivot portion is pivotally connected to the long rod. One end of the support portion and the stop portion are detachably abutted against each other. The spring abuts against the other end of the support portion and the long rod. The support component is fixed to the rod body within the internal space and extends towards the support portion. When the long rod and the short rod bend, causing the support part to move and abut against the top support, the support part swings and separates from the abutting part, and the short rod swings against the rod body; the torque adjustment unit includes an adjustment member, a plurality of first locking teeth and a plurality of second locking teeth. The adjustment member includes a head and a body connected together. The body is rotatably passed through the first through hole and screwed into the screw hole. The head is located outside the rod body. The plurality of first locking teeth are provided on the head, and the plurality of second locking teeth are provided on one of the outer side walls of the rod body. The plurality of first locking teeth and the plurality of second locking teeth are arranged face to face and mesh with each other in the opening direction of the first through hole; the cover assembly includes a cover and a spring piece. One end of the spring piece is inserted into the adjustment member, and the other end passes through the second through hole. The cover is swayably connected to the other end of the spring piece. The cover can selectively cover the head of the adjustment member. Simple Explanation of the Diagram

[0008] Figure 1 is a perspective view of an embodiment of the present invention. Figure 2 is a partial exploded view of Figure 1. Figure 3 is a magnified view of a portion of Figure 2. Figure 4 is another perspective view of Figure 2. Figure 5 is a partial enlarged view of the adjustment component according to an embodiment of the present invention. Figure 6 is a cross-sectional view of an embodiment of the present invention. Figure 7 is a magnified view of part A in Figure 6. Figure 8 is a partial enlarged view of the first and second locking teeth on the BB end face of Figure 1. Figure 9 is a schematic diagram of an embodiment of the present invention in which the protective cover does not cover the head. Implementation

[0009] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention. The use of "a" or "at least one" before the terms mentioned herein is not a limitation on the quantity, and may also be "multiple" depending on the requirements. Such variations in quantity are also within the scope of protection, and are therefore stated in advance.

[0010] Please refer to Figures 1 to 9, which show one embodiment of the present invention. The quick-adjustable torque wrench of the present invention includes: a main body 1, a torque release mechanism 5, a torque adjustment unit 6, and a cover assembly 7.

[0011] The main body 1 includes a drive head 2, a shaft 3 and a handle 4. The drive head 2 and the handle 4 are respectively located at opposite ends of the shaft 3. The shaft 3 encloses an internal space 31. The shaft 3 is provided with a first through hole 32 and a second through hole 33 that communicate with the internal space 31. The first through hole 32 is a round hole and the second through hole 33 is an elongated hole.

[0012] The torque-driven release mechanism 5 includes a long rod 51, a short rod 52, a release element 54, a support element 57, and a spring 58. One end of the long rod 51 is connected to the drive head 2, and the other end extends into the internal space 31. The long rod 51 has a screw hole 511. One end of the short rod 52 is connected to the drive head 2, and the other end extends into the internal space 31. The short rod 52 has a stop portion 53. The release element 54 includes a pivot portion 55 and a support portion 56 connected together. The pivot portion 55 pivots... Connected to the long rod 51, one end of the support part 56 and the abutment part 53 are detachably abutted against each other. The spring 58 springs against the other end of the support part 56 and the long rod 51. The top support 57 is fixed to the rod body 3 in the internal space 31. The top support 57 extends toward the support part 56. When the long rod 51 and the short rod 52 bend and the support part 56 moves to abut against the top support 57, the support part 56 swings and separates from the abutment part 53, and the short rod 52 swings against the rod body 3.

[0013] In actual use, when the user holds the handle 4 and locks the workpiece through the drive head 2, the long rod 51 and the short rod 52 will deform and bend accordingly due to the torque generated by rotation. As the torque increases, the amount of bending deformation will increase accordingly, causing the abutment part 53 to gradually move closer to the top support member 57. When the top support member 57 touches the abutment part 53, the top support member 57 causes the release member 54 to pivot by pressing against the abutment part 53, thereby releasing the short rod 52 to swing against the rod body 3, indicating that the preset torque value has been reached, prompting the user to stop operating to avoid over-tightening and damaging the workpiece.

[0014] The torque adjustment unit 6 includes an adjustment member 61, a plurality of first locking teeth 65, and a plurality of second locking teeth 66. The adjustment member 61 includes a head 62 and a body 63 connected together. The head 62 and the top support 57 are respectively located on opposite sides of the rod body 3. The body 63 is rotatably passed through the first through hole 32 and screwed into the screw hole 511. The body 63 is rotatably positioned on the rod body 3. By rotating the adjustment member 61, the initial deflection of the long rod 51 can be changed, thereby achieving the purpose of adjusting the preset torque value. The head 62 is located outside the rod body 3 for user operation and rotation. The plurality of first locking teeth 65 are provided on the head 62, and the plurality of second locking teeth 66 are provided on one of the outer side walls 34 of the rod body 3. The plurality of first locking teeth 65 and the plurality of second locking teeth 66 are arranged face to face and mesh with each other in the opening direction of the first through hole 32.

[0015] The first locking teeth 65 and the second locking teeth 66 are disposed on the adjusting member 61 and the rod body 3. The user can directly operate the adjusting member 61 to lock and release, which has the advantages of intuitive operation and simplified structure. Furthermore, the adjusting member 61 is screwed to the long rod 51 through the rod body 3. The connection between the adjusting member 61 and the rod body 3 is strong and not easy to loosen or shift. Therefore, the first locking teeth 65 and the second locking teeth 66 can be stably held in the predetermined position, resulting in excellent operational reliability. In addition, the first locking teeth 65 and the second locking teeth 66 are both arranged in a close face-to-face configuration. They shield each other to effectively prevent contact with external objects and prevent the accumulation of dirt, thereby protecting the integrity of the tooth structure and ensuring smooth operation.

[0016] More specifically, the plurality of first locking teeth 65 are arranged in a frame shape with the body 63 as the center, and the plurality of second locking teeth 66 are arranged in a frame shape with the first through hole 32 as the center. In this embodiment, the plurality of first locking teeth 65 and the plurality of second locking teeth 66 are respectively arranged in a circular frame shape. The frame shape arrangement allows the plurality of first locking teeth 65 and the plurality of second locking teeth 66 to mesh at different angle positions, which can improve the locking stability and stress distribution, extend the life of the teeth, and avoid single-point wear causing tooth defects. More specifically, the top surface 651 of the first tooth of the plurality of first locking teeth 65 expands radially outward from the center of the head 62. Similarly, the top surface 661 of the second tooth of the plurality of second locking teeth 66 expands radially outward from the center of the first through hole 32, thereby increasing the width of the teeth as they expand radially outward to enhance structural strength.

[0017] The plurality of first cleats 65 and the body 63 protrude from one of the reference surfaces 621 of the head 62. The plurality of first cleats 65 and the body 63 are spaced apart and together define an avoidance groove 64. During the machining process, the avoidance groove 64 can provide margin space for the cutting tool, thereby improving the accuracy and density of the plurality of first cleats 65.

[0018] The rod body 3 also includes a groove 35 recessed into the outer side wall 34. A plurality of second locking teeth 66 are located within the groove 35. This recessed design helps prevent wear and accidental contact, protecting the structure of the plurality of second locking teeth 66. Furthermore, the radial dimension of the groove 35 is larger than the radial dimension of the head 62. The plurality of second locking teeth 66 and the groove side wall 36 surrounding the groove 35 are spaced apart, collectively defining a groove 37. When the plurality of first locking teeth 65 and the plurality of second locking teeth 66 engage, each first locking tooth 65 protrudes beyond each second locking tooth 66. The groove 37 can accommodate a portion of each first locking tooth 65, allowing for deep engagement to enhance locking strength and resistance to deflection, ensuring that the adjustment value does not change due to external forces. The width of the groove 37 is greater than the width of the avoidance ring groove 64.

[0019] Preferably, the groove 35 has an open structure on both sides in the direction perpendicular to the rod 3, directly communicating with the outside, so that the user's fingers can be inserted into the groove 35 and firmly pressed against the head 62 for rotation.

[0020] Alternatively, in a preferred embodiment, each of the plurality of second teeth 66 in the direction perpendicular to the shaft 3 is provided with a chamfered surface 662. The chamfered surface 662 is located on the open side of the groove 35. The design of the chamfered surface 662 allows the first tooth 65 and the second tooth 66 to mesh with each other, creating a lateral flare, which makes it easier for the user to apply force here and drive the head 62 to rotate.

[0021] The covering assembly 7 includes a cover 71 and a spring 72. One end of the spring 72 is inserted into the adjusting member 61, and the other end passes through the second through hole 33. The cover 71 is swayably connected to the other end of the spring 72. The cover 71 can selectively cover the head 62 of the adjusting member 61 to protect the structural integrity of the head 62.

[0022] Preferably, a unit conversion table 81 is provided on the pole 3 so that the user can quickly view and perform conversions.

[0023] Alternatively, a torque window 82 is provided on the rod body 3, which can provide a clear and intuitive torque reading, making it easy for the user to confirm immediately.

[0024] 1: Main Body 2: Drive head 3: Club shaft 31: Interior Space 32: First perforation 33: Second perforation 34: Lateral wall 35: Groove 36: Tank sidewall 37: Groove 4: Grip 5: Torque-driven release mechanism 51: Long pole 511: Screw hole 52: Short Shot 53: Reliance Department 54: detachment component 55: Pivot 56: Support section 57: Top support component 58: Spring 6: Torque Adjustment Unit 61: Adjustment parts 62: Head 621: Reference Surface 63: Body 64: Evasion Tunnel 65: First tooth 651: First tooth tip surface 66: Second locking tooth 661: Second tooth tip 662: Beveled surface 7: Covering components 71: Protective Cover 72: Shrapnel 81: Unit Conversion Table 82: Torque Window

Claims

1. A quick-adjustable torque wrench, comprising: A main body includes a drive head, a shaft and a handle. The drive head and the handle are respectively located at opposite ends of the shaft. The shaft encloses an internal space and has a first through hole and a second through hole communicating with the internal space. A torsion-force release mechanism includes a long rod, a short rod, a release member, a top support member, and a spring. One end of the long rod is connected to the drive head, and the other end extends into the internal space. The long rod has a screw hole. One end of the short rod is connected to the drive head, and the other end extends into the internal space. The short rod has a stop portion. The release member includes a pivot portion and a support portion connected together. The pivot portion is pivotally connected to the long rod. One end of the support portion and the stop portion are detachably abutted against each other. The spring springs against the other end of the support portion and the long rod. The top support member is fixed to the rod body in the internal space and extends towards the support portion. When the long rod and the short rod flex, causing the support portion to move and abut against the top support member, the support portion swings and separates from the stop portion, and the short rod swings against the rod body. A torque adjustment unit includes an adjustment member, a plurality of first locking teeth, and a plurality of second locking teeth. The adjustment member includes a head and a body connected together. The body is rotatably passed through the first through hole and screwed into the screw hole. The head is located outside the rod body. The plurality of first locking teeth are provided on the head, and the plurality of second locking teeth are provided on an outer side wall of the rod body. The plurality of first locking teeth and the plurality of second locking teeth are arranged face-to-face and mesh with each other in the opening direction of the first through hole. A cover assembly includes a cover and a spring. One end of the spring is inserted into the adjustment member, and the other end passes through the second through hole. The cover is pivotally connected to the other end of the spring and can selectively cover the head of the adjustment member.

2. The quick-adjustable torque wrench as claimed in claim 1, wherein the plurality of the first locking teeth are arranged in a frame shape with the body as the center, and the plurality of the second locking teeth are arranged in a frame shape with the first through hole as the center.

3. The quick-adjustable torque wrench as claimed in claim 2, wherein the top surface of the first tooth of one of the plurality of first teeth is radially expanded outward from the center of the head.

4. The quick-adjustable torque wrench as claimed in claim 2, wherein the top surface of the second tooth of one of the plurality of second teeth expands radially outward from the center of the first through hole.

5. The quick-adjustable torque wrench as claimed in claim 2, wherein each of the plurality of second teeth in a direction perpendicular to the shaft has a beveled surface.

6. The quick-adjustable torque wrench as claimed in claim 2, wherein a plurality of the first teeth and the body are respectively protruding from a reference surface of the head, and the plurality of the first teeth and the body are spaced apart to jointly define an avoidance groove.

7. The quick-adjustable torque wrench as claimed in any one of claims 1 to 6, wherein the shaft further includes a groove recessed into the outer side wall, and the plurality of the second locking teeth are located within the groove.

8. The quick-adjustable torque wrench as claimed in claim 7, wherein the radial dimension of the groove is greater than the radial dimension of the head, and the plurality of second teeth are spaced apart from a groove sidewall surrounding the groove to define a groove, wherein when the plurality of first teeth and the plurality of second teeth are engaged, each of the first teeth protrudes from each of the second teeth, and the groove can accommodate a portion of each of the first teeth.

9. The quick-adjustable torque wrench as claimed in claim 7, wherein the groove on both sides in the direction perpendicular to the shaft is an open structure and directly communicates with the outside.

10. The quick-adjustable torque wrench as claimed in claim 1, wherein the top surface of one of the second teeth of the plurality of second teeth expands radially outward from the center of the first through hole; the plurality of second teeth in a direction perpendicular to the shaft are each provided with a chamfered surface; the plurality of first teeth and the body are respectively protruding from a reference surface of the head, and the plurality of first teeth and the body are spaced apart to jointly define a clearance groove; the shaft further includes a groove recessed in the outer sidewall, and the plurality of second teeth are located in the groove; the radial dimension of the groove is larger than the radial dimension of the head, and the plurality of second teeth are spaced apart from the groove sidewall surrounding the groove. A groove is defined by a series of spaced-out teeth. When the plurality of first teeth and the plurality of second teeth engage, each first tooth protrudes from each second tooth, and the groove can accommodate a portion of each first tooth. The groove has an open structure on both sides in the direction perpendicular to the shaft, directly connecting to the outside. The beveled surface is located on the open side of the groove. The width of the groove is greater than the width of the avoidance ring groove. A unit conversion table is provided on the shaft. A torque window is provided on the shaft. The head and the top support are located on opposite sides of the shaft. The first through hole is a round hole, and the second through hole is an elongated hole. The body is rotatably positioned on the shaft.

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