Insulated replaceable head digital torque wrench

Abstract

The application relates to an insulated replaceable-head digital torque wrench, which comprises a metal inner shell, a torque sensor, a digital display component, a replaceable wrench head and an insulation connecting piece. The metal inner shell is internally provided with a cavity for accommodating various components. The torque sensor and the digital display component are fixedly installed in the cavity of the metal inner shell and are electrically connected. The insulation connecting piece at least comprises a metal connecting column, a first clamping block, a second clamping block and an insulation isolation layer. The metal connecting column is provided with a first clamping groove. The torque sensor is fixedly connected with the first clamping block. The first clamping block is inserted into the first clamping groove. The size of the first clamping groove is larger than that of the first clamping block. The insulation isolation layer is located in the gap between the first clamping block and the first clamping groove. The metal connecting column is provided with a second clamping groove. The second clamping block is fixedly connected to one end of the replaceable wrench head. The second clamping block is in clamping and matching connection with the second clamping groove. The wrench has the effects of keeping good insulation performance, controllable cost and high convenience.

Description

Technical Field

[0001] This application relates to the field of torque wrenches, and more particularly to an insulated, interchangeable-head digital torque wrench. Background Technology

[0002] A digital torque wrench is an advanced torque measurement tool that adds a digital display function to the traditional torque wrench, making torque measurement more accurate and intuitive. The digital torque wrench has a built-in torque sensor that senses and measures the torque applied to the wrench in real time when the operator uses it to tighten the torque. The torque signal output by the torque sensor is amplified by an internal converter, further refined by signal processing circuitry, and finally clearly displayed digitally on the wrench's display screen.

[0003] Digital torque wrenches are typically equipped with an adjustment mechanism, allowing operators to set the desired torque value by rotating the adjuster or inputting a specific value. Once the preset torque value is reached, the wrench will emit a warning signal (such as a beep or a flashing LED indicator) to ensure that the applied torque meets the expected requirements.

[0004] Digital torque wrenches are widely used in applications requiring precise torque control, such as power, automotive manufacturing and repair, electronics manufacturing, aerospace, and precision assembly. In automotive manufacturing, digital torque wrenches are used to tighten bolts on critical components such as engines, transmission systems, and suspension systems, ensuring the tightening force meets the manufacturer's requirements. In electronics manufacturing, digital torque wrenches are used to precisely tighten various small bolts, guaranteeing product performance and stability.

[0005] For example, a Taiwanese invention patent with patent number TW1832213B discloses a lubricated torque wrench, including a handle body, a steel pipe connected to one side of the handle body, a drive head provided on one side of the steel pipe, and further including: a first slider body, a second slider body disposed inside the first slider body, the second slider body connected to a drive block, the drive block connected to a collision block, the first slider body, the second slider body, and the collision block disposed inside the steel pipe; and an oil groove disposed on the outside of the first slider body, the oil groove being a plurality of evenly distributed around the periphery of the first slider body, the oil groove being disposed on the axial surface of the first slider body, the oil groove being circular, rectangular, polygonal, or annular, and the number and distribution of the oil grooves are not limited.

[0006] The torque wrench in the aforementioned patent uses an oil groove structure to lubricate the internal components, thereby reducing wear. However, the exposed steel pipe of this torque wrench makes it difficult to use in scenarios requiring insulation. Whether in the manufacturing and repair of various new energy vehicles, electronic products, or precision equipment, power cannot be completely cut off for various reasons. Therefore, when using tools to repair these electrically powered production equipment, it is necessary to ensure the electrical insulation performance of the tools to improve safety.

[0007] While it is feasible to further add insulation structures on the basis of the above, since different torque wrenches are suitable for different components, it is certainly feasible to prepare a set of torque wrenches with high insulation performance in order to ensure that good insulation performance is maintained when maintaining different components. However, this would obviously lead to excessively high costs and a decrease in ease of use. Utility Model Content

[0008] To ensure good insulation performance when maintaining different components, while maintaining cost control and high convenience, this application provides an insulated, interchangeable-head digital torque wrench.

[0009] The insulated, replaceable-head digital torque wrench provided in this application adopts the following technical solution: An insulated, replaceable-head digital torque wrench includes a metal inner shell, a torque sensor, a digital display component, a replaceable wrench head, and an insulating connector. The metal inner shell has a cavity to accommodate the various components. The torque sensor and the digital display component are both fixedly installed within the cavity of the metal inner shell and are electrically connected. The metal inner shell has a display hole, and the digital display component is snapped into the display hole. The insulating connector includes at least a metal connecting post, a first locking block, a second locking block, and an insulating layer. The end of the metal connecting post near the torque sensor has a first slot, and the end of the torque sensor near the metal connecting post is fixedly connected to the first locking block, which is inserted into the first slot. The size of the first slot is larger than the size of the first locking block. The insulating layer is located in the gap between the first locking block and the first slot. The other end of the metal connecting post has a second slot, and the second locking block is fixedly connected to one end of the replaceable wrench head, engaging with the second slot.

[0010] Optionally, the metal connecting post has a vent hole at one end near the replaceable wrench head, and the vent hole is connected to the second slot.

[0011] Optionally, the second slot has a guide groove circumferentially provided at one end near the replaceable wrench head, and the second block has a chamfer circumferentially provided at one end near the metal connecting post.

[0012] Optionally, the first slot is provided with an anti-detachment block at one end near the torque sensor, and the first slot is provided with an anti-detachment groove for the anti-detachment block to be engaged.

[0013] Optionally, a fixing groove is provided on the inner wall of the first card slot, and a fixing block is fixedly provided on the first card block and sunk into the fixing groove.

[0014] Optionally, the outer wall of the metal connecting column is circumferentially covered with an insulating coating layer, which is connected to the insulating isolation layer.

[0015] Optionally, the first card block has a first insulating hole, and the metal connecting post has a second insulating hole. An insulating connecting post passes through the first insulating hole and the second insulating hole, and the insulating connecting post is fixedly connected to the insulating covering layer and the insulating isolation layer.

[0016] Optionally, the outer wall of the metal inner shell is covered with a first insulating coating, and the replaceable wrench head is covered with a second insulating coating.

[0017] Optionally, the outer wall of the first insulating cover has a first annular groove circumferentially formed at the end near the replaceable wrench head, and the inner wall of the second insulating cover has a second annular groove circumferentially formed at the end opposite to the replaceable wrench head. The first insulating cover and the second insulating cover are engaged through the first annular groove and the second annular groove.

[0018] In summary, this application includes at least one of the following beneficial technical effects: By setting an insulating connector between the replaceable wrench head and the torque sensor, the replaceable wrench head can be detachably connected via the second locking block and the second slot on the metal connecting post. Therefore, different wrench heads with different functions can be replaced according to actual needs. Although the torque sensor and the metal connecting post are not integrally formed, the torque sensor and the insulating connector are fixedly connected by the first locking block and the second slot and the insulating isolation layer in the gap, but the insulation performance is still maintained. The additional guide groove, chamfer structure, and vent structure facilitate the insertion and installation of the replaceable wrench head, and prevent the vacuum negative pressure from hindering the removal of the replaceable wrench head. The combination of the additional anti-detachment block and anti-detachment groove, as well as the combination of the fixing groove and the fixing block, can significantly improve the stability of the fixed connection between the torque sensor and the metal connecting column. The additional insulating coating layer and insulating connecting post further improve the insulation between the metal connecting post and the torque sensor, and further improve the fixed connection between the two. By providing a first insulating cover on the metal inner shell and a second insulating cover on the replaceable wrench head, and by providing a first annular groove and a second annular groove between the two, the entire wrench can be fully insulatingly covered. Combined with the internal insulating structure, the entire wrench can have good insulation performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view of an embodiment of this application, showing the connection structure of the torque sensor, the insulating connector, and the replaceable wrench head.

[0021] Figure 3 This is a cross-sectional view from another direction of an embodiment of this application, showing the connection structure of the torque sensor, the insulating connector, and the replaceable wrench head.

[0022] Figure 4 This is a cross-sectional view of the overall structure of the torque sensor, insulating connector, and replaceable wrench head after they have been removed according to an embodiment of this application.

[0023] Figure 5 This is an exploded structural diagram of the torque sensor and insulating connector according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Metal inner shell; 2. Torque sensor; 3. Digital display component; 4. Replaceable wrench head; 5. Insulating connector; 51. Metal connecting post; 52. First locking block; 53. First locking groove; 54. Anti-detachment block; 55. Anti-detachment groove; 56. Fixing block; 57. Fixing groove; 58. Second locking block; 59. Second locking groove; 510. Guide groove; 511. Chamfer; 512. Vent hole; 61. Insulating isolation layer; 62. Insulating covering layer; 63. Insulating connecting post; 7. Display hole; 8. First insulating covering; 81. First annular groove; 9. Second insulating covering; 91. Second annular groove. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] This application discloses an insulated, replaceable-head digital torque wrench, including a metal inner shell 1, a torque sensor 2, a digital display component 3, a replaceable wrench head 4, and an insulated connector 5.

[0027] The inner metal shell 1 has a cavity to accommodate various components. The torque sensor 2 and the digital display component 3 are both fixedly installed in the cavity of the inner metal shell 1. The torque sensor 2 and the digital display component 3 are electrically connected. The inner metal shell 1 has a display hole 7, and the digital display component 3 is snapped into the display hole 7.

[0028] The insulating connector 5 includes at least a metal connecting post 51, a first locking block 52, a second locking block 58, and an insulating isolation layer 61. A first locking groove 53 is formed at the end of the metal connecting post 51 near the torque sensor 2. The first locking block 52 is fixedly connected to the end of the torque sensor 2 near the metal connecting post 51. The first locking block 52 is inserted into the first locking groove 53. An anti-detachment block 54 is provided at the end of the first locking groove 53 near the torque sensor 2. An anti-detachment groove 55 is formed on the first locking block 52 for the anti-detachment block 54 to engage. A fixing groove 57 is formed on the inner wall of the first locking groove 53, and a fixing block 56 is fixedly attached to the first locking block 52 and recessed into the fixing groove 57.

[0029] The size of the first slot 53 is larger than the size of the first block 52, and the insulating layer 61 is located in the gap between the first block 52 and the first slot 53. The outer wall of the metal connecting post 51 is circumferentially covered with an insulating covering layer 62, which is connected to the insulating layer 61. The first block 52 has a first insulating hole, and the metal connecting post 51 has a second insulating hole. An insulating connecting post 63 passes through the first and second insulating holes, and is fixedly connected to the insulating covering layer 62 and the insulating layer 61.

[0030] The other end of the metal connecting post 51 is provided with a second slot 59, and a second locking block 58 is fixedly connected to one end of the replaceable wrench head 4. The second locking block 58 and the second slot 59 are engaged. The end of the metal connecting post 51 near the replaceable wrench head 4 is provided with a vent hole 512, which is connected to the second slot 59. The end of the second slot 59 near the replaceable wrench head 4 is provided with a guide groove 510 in the circumferential direction, and the end of the second locking block 58 near the metal connecting post 51 is provided with a chamfer 511 in the circumferential direction.

[0031] The outer wall of the metal inner shell 1 is covered with a first insulating cover 8, and the replaceable wrench head 4 is covered with a second insulating cover 9. The outer wall of the first insulating cover 8 has a first annular groove 81 circumferentially formed at one end near the replaceable wrench head 4, and the inner wall of the second insulating cover 9 has a second annular groove 91 circumferentially formed at one end away from the replaceable wrench head 4. The first insulating cover 8 and the second insulating cover 9 are engaged and fitted together by the first annular groove 81 and the second annular groove 91.

[0032] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An insulated, interchangeable-head digital torque wrench, characterized in that: The device includes a metal inner shell (1), a torque sensor (2), a digital display component (3), a replaceable wrench head (4), and an insulating connector (5). The metal inner shell (1) has a cavity inside to accommodate the components. The torque sensor (2) and the digital display component (3) are both fixedly installed in the cavity of the metal inner shell (1). The torque sensor (2) and the digital display component (3) are electrically connected. The metal inner shell (1) has a display hole (7). The digital display component (3) is snapped into the display hole (7). The insulating connector (5) includes at least a metal connecting post (51), a first locking block (52), a second locking block (58), and an insulating isolation layer (61). The metal connecting post (51) is close to... A first slot (53) is provided at one end of the torque sensor (2). A first block (52) is fixedly connected to one end of the torque sensor (2) near the metal connecting post (51). The first block (52) is inserted into the first slot (53). The size of the first slot (53) is larger than the size of the first block (52). The insulating layer (61) is located in the gap between the first block (52) and the first slot (53). A second slot (59) is provided at the other end of the metal connecting post (51). The second block (58) is fixedly connected to one end of the replaceable wrench head (4). The second block (58) and the second slot (59) engage with each other.

2. The insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The metal connecting post (51) has a vent hole (512) at one end near the replaceable wrench head (4), and the vent hole (512) is connected to the second slot (59).

3. The insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The second slot (59) has a guide groove (510) circumferentially provided at one end near the replaceable wrench head (4), and the second block (58) has a chamfer (511) circumferentially provided at one end near the metal connecting post (51).

4. The insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The first slot (53) is provided with an anti-detachment block (54) at one end near the torque sensor (2), and the first slot (52) is provided with an anti-detachment groove (55) for the anti-detachment block (54) to be inserted.

5. An insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The inner wall of the first card slot (53) is provided with a fixing groove (57), and a fixing block (56) is fixedly provided on the first card block (52) and sunk into the fixing groove (57).

6. An insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The outer wall of the metal connecting column (51) is circumferentially covered with an insulating covering layer (62), which is connected to the insulating isolation layer (61).

7. An insulated, replaceable-head digital torque wrench according to claim 6, characterized in that: The first card block (52) has a first insulating hole, and the metal connecting post (51) has a second insulating hole. An insulating connecting post (63) is inserted into the first insulating hole and the second insulating hole. The insulating connecting post (63) is fixedly connected to the insulating covering layer (62) and the insulating isolation layer (61).

8. An insulated, replaceable-head digital torque wrench according to claim 1, characterized in that: The outer wall of the metal inner shell (1) is covered with a first insulating cover (8), and the replaceable wrench head (4) is covered with a second insulating cover (9).

9. An insulated, replaceable-head digital torque wrench according to claim 8, characterized in that: The outer wall of the first insulating cover (8) is provided with a first annular groove (81) at one end near the replaceable wrench head (4), and the inner wall of the second insulating cover (9) is provided with a second annular groove (91) at one end away from the replaceable wrench head (4). The first insulating cover (8) and the second insulating cover (9) are engaged by the first annular groove (81) and the second annular groove (91).

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