Digital display torque wrench

Abstract

The digital display torque wrench comprises a metal inner shell, a square tenon connector, a torque sensor, a storage battery, a torque displayer and an insulation coating layer, a clamping groove is formed in the end, close to the torque sensor, of the square tenon connector, a protruding rod is arranged at the end, close to the square tenon connector, of the torque sensor, and the protruding rod is inserted into the clamping groove; the width of the clamping groove is larger than the thickness of the protruding rod so that a gap can be formed between the side wall of the clamping groove and the protruding rod, the gap is filled with an insulating filling layer, the torque sensor is clamped and installed in a cavity in one end of the metal inner shell, and the storage battery is clamped and installed in a cavity in one end, away from the torque sensor, of the metal inner shell. An inlaying hole is formed in the portion, between the storage battery and the torque sensor, of the metal inner shell, the torsion displayer is fixedly installed in the inlaying hole, and the square tenon connector and the metal inner shell are wrapped with the insulation wrapping layer. The torque wrench has the effect of improving the situation that an existing common torque wrench cannot guarantee the electrical insulation performance.

Description

Technical Field

[0001] The present application relates to the field of torque wrenches, and in particular to a digital display torque wrench. Background Art

[0002] The digital torque wrench is an advanced torque measurement tool. It adds a digital display function to the traditional torque wrench, making the torque measurement more accurate and intuitive. The digital torque wrench has a built-in torque sensor. When the operator uses the wrench to tighten, the torque sensor will sense and measure the torque applied to the wrench in real time. The torque signal output by the torque sensor is amplified by the internal converter, and then further fine-tuned by the signal processing circuit, and finally clearly displayed in digital form on the wrench's display.

[0003] Digital torque wrenches are usually equipped with an adjustment device, and the operator can set the required torque value by rotating the adjuster or entering a specific value. Once the preset torque value is reached, the wrench will issue a prompt signal (such as a beep or a flashing LED indicator) to ensure that the applied torque reaches the expected value.

[0004] Digital torque wrenches are widely used in applications that require precise control of torque, such as electricity, automobile manufacturing and maintenance, electronic product manufacturing, aerospace industry, precision assembly, etc. In the automobile manufacturing process, digital torque wrenches can be used to tighten bolts of key components such as engines, transmission systems, and suspension systems to ensure that the tightening force meets the manufacturer's requirements. In the manufacture of electronic products, digital torque wrenches can be used to precisely tighten various tiny bolts to ensure product performance and stability.

[0005] For example, in the invention patent of Taiwan, China with patent number TW1832213B, a torque wrench with lubrication is disclosed, including a handle body, one side of the handle body is connected to a steel pipe, one side of the steel pipe is provided with a driving head, and also includes: a first slider body, a second slider body is provided in the first slider body, the second slider body is connected to a driving block, the driving block is connected to a collision block, the first slider body, the second slider body and the collision block are arranged in the steel pipe; and an oil groove, the oil groove is arranged on the outside of the first slider body, the oil groove is arranged by a plurality of evenly distributed around the first slider body, the oil groove is arranged on the axial surface of the first slider body, the oil groove can be circular, rectangular, polygonal and annular, and the number and distribution of the oil grooves are not limited.

[0006] The torque wrench in the above patent is provided with an oil groove structure to lubricate the internal components of the torque wrench, thereby reducing wear. However, the steel pipe of the torque wrench is exposed, which makes it difficult to be used in scenarios with insulation requirements.

[0007] Whether it is the manufacturing and maintenance of various new energy vehicles or electronic products and precision equipment, the power supply cannot be completely cut off due to various reasons. Therefore, when using tools to repair these energized production equipment, it is necessary to ensure the electrical insulation performance of the tools used to improve safety. Utility Model Content

[0008] In order to improve the problem that the currently common torque wrenches cannot guarantee the electrical insulation performance, the present application provides a digital display torque wrench.

[0009] The digital torque wrench provided in this application adopts the following technical solution:

[0010] A digital torque wrench comprises a metal inner shell, a square tenon connector, a torque sensor, a battery, a torque display and an insulating coating layer, wherein a slot is provided at one end of the square tenon connector close to the torque sensor, a convex rod is provided at one end of the torque sensor close to the square tenon connector, the convex rod is inserted into the slot, the width of the slot is greater than the thickness of the convex rod so that a gap is formed between the side wall of the slot and the convex rod, the gap is filled with an insulating filling layer, the torque sensor is snap-fitted into a cavity at one end of the metal inner shell, the battery is snap-fitted into a cavity at one end of the metal inner shell away from the torque sensor, an inlay hole is provided on the metal inner shell between the battery and the torque sensor, the torque display is fixedly installed in the inlay hole, and the insulating coating layer is coated on the square tenon connector and the metal inner shell.

[0011] Optionally, the insulating covering layer includes a first insulating shell, a second insulating shell and a third insulating shell, the first insulating shell is covered on the square tenon connector, the second insulating shell is covered on an end of the metal inner shell close to the square tenon connector, the third insulating shell is covered on an end of the metal inner shell away from the square tenon connector, and the third insulating shell is provided with a display hole adapted to the torque display.

[0012] Optionally, a first clamping ring is circumferentially provided at one end of the first insulating shell close to the second insulating shell, and a second clamping ring is provided at one end of the second insulating shell close to the first insulating shell, and the first clamping ring is covered on the second clamping ring.

[0013] Optionally, a third clamping ring is provided at one end of the second insulating shell close to the third insulating shell, a fourth clamping ring is provided at one end of the third insulating shell close to the second insulating shell, and the third clamping ring is covered on the fourth clamping ring.

[0014] Optionally, a support foot is provided at one end of the outer circumferential wall of the third insulating shell facing away from the second insulating shell, and there are at least two support feet which are arranged at intervals along the outer circumferential wall of the third insulating shell.

[0015] Optionally, a first groove and a second groove are formed on the third insulating shell, the first groove is filled with a first anti-slip layer by injection molding, and the second groove is filled with a second anti-slip layer by injection molding.

[0016] Optionally, an annular groove is circumferentially formed on the third insulating shell, the annular groove is communicated with the first groove, and an annular anti-slip layer is injection-molded and filled in the annular groove.

[0017] Optionally, the first anti-slip layer, the second anti-slip layer and the annular anti-slip layer are provided with a frosted surface with a roughness of Ra=0.5-1 μm.

[0018] Optionally, the third insulating shell is provided with a first positioning protrusion and a second positioning protrusion, and the first positioning protrusion and the second positioning protrusion are arranged at intervals along the circumference of the third insulating shell, and the first anti-slip layer is provided with a first clamping hole that is clamped with the first positioning protrusion, and the second anti-slip layer is provided with a second clamping hole that is clamped with the second positioning protrusion.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] The torque wrench in the present application connects the square tenon connector and the torque sensor through the card slot and the protruding rod, so as to better transmit the torque data of the square tenon connector to the torque sensor, thereby converting the torque data into an electronic signal through the torque sensor. It is particularly important to note that, unlike the common mechanical torque wrenches, the torque wrench in the present application is a digital display type. By forming a gap between the card slot and the protruding rod and filling it with an insulating filling layer, on the one hand, it does not hinder the square tenon connector from transmitting the torque data to the torque sensor, and on the other hand, it can insulate the square tenon connector and the torque sensor, thereby greatly reducing the possibility of various components inside the metal inner shell being damaged by electric shock; on this basis, the metal inner shell is used to withstand the torque of the entire torque wrench, and the insulating coating layer covering the metal inner shell and the square tenon connector can ensure the electrical insulation performance of the entire torque wrench;

[0021] By setting the insulating coating layer as a separate first insulating shell, a second insulating shell and a third insulating shell, and by the covering cooperation between the first clamp ring and the second clamp ring, and the covering cooperation between the third clamp ring and the fourth clamp ring, on the one hand, the difficulty of injection molding is greatly reduced, and on the other hand, the mutual buckling strength between the several insulating shells is high;

[0022] By arranging a support leg structure on the third insulating shell, the entire torque wrench can be placed upright for easy storage;

[0023] By further arranging a first anti-slip layer, a second anti-slip layer and an annular anti-slip layer on the third insulating shell, and by cooperating with the clamping holes and the positioning protrusions, the bonding stability between each anti-slip layer and the third insulating shell is further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present application, and the third insulating shell in the figure is removed.

[0026] Figure 3 It is a partial structural cross-sectional view of an embodiment of the present application, used to show the structure inside the metal inner shell cavity.

[0027] Figure 4 It is a partial structural cross-sectional view of an embodiment of the present application, used to show the connection structure of the square tenon connector and the torque sensor.

[0028] Figure 5 It is a schematic diagram of the structure of the third insulating shell of the embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the structures of the first anti-slip layer, the second anti-slip layer and the annular anti-slip layer in an embodiment of the present application.

[0030] Explanation of the reference numerals: 1. metal inner shell; 11. inlay hole; 2. square tenon connector; 21. slot; 3. torque sensor; 31. convex rod; 4. gap; 41. insulating filling layer; 5. battery; 6. torque display; 7. insulating coating layer; 71. first insulating shell; 72. first snap ring; 73. second insulating shell; 74. second snap ring; 75. third snap ring; 76. third insulating shell; 77. fourth snap ring; 78. display hole; 81. first groove; 82. second groove; 83. annular groove; 84. first anti-skid layer; 85. first snap hole; 86. second anti-skid layer; 87. second snap hole; 88. annular anti-skid layer; 91. first positioning protrusion; 92. second positioning protrusion; 10. support foot. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 This application is described in further detail.

[0032] The embodiment of the present application discloses a digital torque wrench, including a metal inner shell 1, a square tenon connector 2, a torque sensor 3, a battery 5, a torque display 6 and an insulating coating layer 7. A slot 21 is provided at one end of the square tenon connector 2 close to the torque sensor 3, and a protruding rod 31 is provided at one end of the torque sensor 3 close to the square tenon connector 2. The protruding rod 31 is inserted into the slot 21. The width of the slot 21 is greater than the thickness of the protruding rod 31, so that a gap 4 is formed between the side wall of the slot 21 and the protruding rod 31. The gap 4 is filled with an insulating filling layer 41 to insulate the square tenon connector 2 and the torque sensor 3. The torque sensor 3 is snap-fitted and installed in the cavity at one end of the metal inner shell 1, and the battery 5 is snap-fitted and installed in the cavity at one end of the metal inner shell 1 away from the torque sensor 3. An inlay hole 11 is provided on the metal inner shell 1 between the battery 5 and the torque sensor 3, and the torque display 6 is fixedly installed in the inlay hole 11. The insulating coating layer 7 is coated on the square tenon connector 2 and the metal inner shell 1 to ensure the insulation of the entire torque wrench.

[0033] The insulating sheath 7 comprises a first insulating shell 71, a second insulating shell 73 and a third insulating shell 76. The first insulating shell 71 is sheathed on the square tenon connector 2, the second insulating shell 73 is sheathed on one end of the metal inner shell 1 close to the square tenon connector 2, a first clamping ring 72 is circumferentially provided on one end of the first insulating shell 71 close to the second insulating shell 73, a second clamping ring 74 is provided on one end of the second insulating shell 73 close to the first insulating shell 71, and the first clamping ring 72 is sheathed on the second clamping ring 74.

[0034] The third insulating shell 76 is provided to cover the end of the metal inner shell 1 away from the square tenon connector 2, and the third insulating shell 76 is provided with a display hole 78 adapted to the torque display 6. A third clamping ring 75 is provided at one end of the second insulating shell 73 close to the third insulating shell, and a fourth clamping ring 77 is provided at one end of the third insulating shell 76 close to the second insulating shell 73, and the third clamping ring 75 is provided to cover the fourth clamping ring 77.

[0035] The third insulating housing 76 is provided with a first groove 81 and a second groove 82. The third insulating housing 76 is also provided with an annular groove 83 in a circumferential direction. The annular groove 83 is connected to the first groove 81. The first groove 81 is filled with a first anti-slip layer 84 by injection molding. The second groove 82 is filled with a second anti-slip layer 86 by injection molding. The annular groove 83 is filled with an annular anti-slip layer 88 by injection molding. The first anti-slip layer 84, the second anti-slip layer 86 and the annular anti-slip layer 88 are provided with a frosted surface and a roughness Ra=0.5-1μm. In this embodiment, the roughness Ra=0.7μm.

[0036] The third insulating shell 76 is provided with a first positioning protrusion 91 and a second positioning protrusion 92, and the first positioning protrusion 91 and the second positioning protrusion 92 are arranged at intervals along the circumference of the third insulating shell 76. The first anti-slip layer 84 is provided with a first clamping hole 85 that is clamped with the first positioning protrusion 91, and the second anti-slip layer 86 is provided with a second clamping hole 87 that is clamped with the second positioning protrusion 92.

[0037] A support leg 10 is provided at one end of the outer wall of the third insulating shell 76 facing away from the second insulating shell 73 . There are at least two support legs 10 which are arranged at intervals along the outer wall of the third insulating shell 76 . In the present application, there are two support legs 10 which are arranged at intervals along the third insulating shell 76 .

[0038] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A digital torque wrench, characterized in that: The invention comprises a metal inner shell (1), a square tenon connector (2), a torque sensor (3), a storage battery (5), a torque display (6) and an insulating coating layer (7), wherein the square tenon connector (2) is provided with a slot (21) at one end close to the torque sensor (3), and the torque sensor (3) is provided with a protruding rod (31) at one end close to the square tenon connector (2), wherein the protruding rod (31) is inserted into the slot (21), and the width of the slot (21) is greater than the thickness of the protruding rod (31) so that the protruding rod (31) is provided on the side of the slot (21). A gap (4) is formed between the wall and the convex rod (31), and an insulating filling layer (41) is filled in the gap (4). The torque sensor (3) is snap-fitted and installed in a cavity at one end of the metal inner shell (1), and the battery (5) is snap-fitted and installed in a cavity at one end of the metal inner shell (1) away from the torque sensor (3). An inlay hole (11) is opened on the metal inner shell (1) between the battery (5) and the torque sensor (3), and the torque display (6) is fixedly installed in the inlay hole (11).

2. A digital torque wrench according to claim 1, characterized in that: The insulating sheath (7) comprises a first insulating shell (71), a second insulating shell (73) and a third insulating shell (76); the first insulating shell (71) is disposed to cover the square tenon connector (2); the second insulating shell (73) is disposed to cover an end of the metal inner shell (1) close to the square tenon connector (2); the third insulating shell (76) is disposed to cover an end of the metal inner shell (1) away from the square tenon connector (2); and the third insulating shell (76) is provided with a display hole (78) adapted to the torque display (6).

3. A digital torque wrench according to claim 2, characterized in that: A first clamping ring (72) is circumferentially provided at one end of the first insulating shell (71) close to the second insulating shell (73), and a second clamping ring (74) is provided at one end of the second insulating shell (73) close to the first insulating shell (71), and the first clamping ring (72) is arranged to cover the second clamping ring (74).

4. A digital torque wrench according to claim 2, characterized in that: A third clamping ring (75) is provided at one end of the second insulating shell (73) close to the third insulating shell, a fourth clamping ring (77) is provided at one end of the third insulating shell (76) close to the second insulating shell (73), and the third clamping ring (75) is disposed on the fourth clamping ring (77) in a covering manner.

5. A digital torque wrench according to claim 2, characterized in that: A support foot (10) is provided at one end of the outer peripheral wall of the third insulating shell (76) facing away from the second insulating shell (73), and there are at least two support feet (10) arranged at intervals along the outer peripheral wall of the third insulating shell (76).

6. A digital torque wrench according to claim 2, characterized in that: The third insulating shell (76) is provided with a first groove (81) and a second groove (82); the first groove (81) is filled with a first anti-slip layer (84) by injection molding, and the second groove (82) is filled with a second anti-slip layer (86) by injection molding.

7. A digital torque wrench according to claim 6, characterized in that: An annular groove (83) is provided circumferentially on the third insulating housing (76), the annular groove (83) being connected to the first groove (81), and an annular anti-slip layer (88) is injection-molded inside the annular groove (83).

8. A digital torque wrench according to claim 7, characterized in that: The first anti-slip layer (84), the second anti-slip layer (86) and the annular anti-slip layer (88) are provided with frosted surfaces with a roughness Ra=0.5-1 μm.

9. A digital torque wrench according to claim 6, characterized in that: The third insulating shell (76) is provided with a first positioning protrusion (91) and a second positioning protrusion (92), the first positioning protrusion (91) and the second positioning protrusion (92) are arranged at intervals along the circumference of the third insulating shell (76), the first anti-slip layer (84) is provided with a first clamping hole (85) for clamping with the first positioning protrusion (91), and the second anti-slip layer (86) is provided with a second clamping hole (87) for clamping with the second positioning protrusion (92).

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