Insulation digital display torque sensor

Abstract

The utility model relates to an insulating digital display torque sensor, which comprises a clamping seat for mounting a ratchet wheel, a sensor body and an insulating connecting piece for connecting the clamping seat and the sensor body in an insulating manner, the insulating connecting piece comprises two clamping plates and a bolt, the two clamping plates are fixedly connected to one end of the clamping seat, and the two clamping plates are matched with the clamping groove to form a clamping groove; the bolt is fixedly connected to one end of the sensor body, the end, away from the sensor body, of the bolt is inserted into the clamping groove, the width of the bolt is smaller than that of the clamping groove, so that first gaps are formed between the bolt and the two clamping plates, second gaps are formed between the bolt and the groove bottom of the clamping groove, and a first insulating layer is formed in each first gap in an injection molding mode. A second insulating layer is arranged in the second gap in an injection molding mode, and the first insulating layer is connected with the second insulating layer. According to the torque sensor, the insulation performance can be ensured, and it can be ensured that the torque sensor obtains accurate torque data.

Description

Technical Field

[0001] The present application relates to the field of torque sensors, and in particular to an insulating digital torque sensor. Background Art

[0002] The digital torque wrench is an advanced torque measurement tool that 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 sensor will sense and measure the torque applied to the wrench in real time. The torque signal output by the sensor is amplified by the internal converter, and then further fine-tuned by the signal processing circuit, and finally clearly displayed on the wrench display in digital form.

[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 situations where precise control of torque is required, such as automobile manufacturing and maintenance, electronic product manufacturing, aerospace industry, precision assembly and other fields. In the automobile manufacturing process, digital torque wrenches can be used to tighten the bolts of key components such as engines, transmission systems, and suspension systems to ensure that the tightening force meets the manufacturer's requirements. In electronic product manufacturing, digital torque wrenches can be used to precisely tighten various tiny bolts to ensure product performance and stability.

[0005] Whether it is the manufacturing and maintenance of various types of electric power, new energy vehicles, electronic products or 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.

[0006] For example, in a Chinese patent application document with application publication number CN113732999A, a torque wrench is disclosed, which includes a main body tube, the main body tube includes an adjusting end and a tool end, a push piece is slidably arranged inside the main body tube along the axis of the main body tube, a rotating piece is rotatably arranged at the adjusting end of the main body tube, a screw is fixedly arranged on the side of the rotating piece close to the push piece, the screw is coaxial with the main body tube, the screw is penetrated by the push piece and is threadedly connected to the push piece, and is characterized in that: the rotating piece is penetrated into the adjusting end of the main body tube, a handle is rotatably arranged on the side of the rotating piece away from the push piece, and the handle is connected to the rotating piece. The movable part is connected along the axial sliding of the main body tube, and the side of the rotating part close to the handle and the side of the handle close to the rotating part are respectively provided with splines and spline grooves that adapt to each other; and the torque wrench also includes a limit assembly for limiting the sliding of the handle; the limit assembly includes an abutment sleeve sleeved on the main body tube, the abutment sleeve is threadedly connected to the main body tube, and the end of the abutment sleeve close to the handle abuts the handle; the abutment sleeve is a first insulating sleeve, and the handle is sleeved with a second insulating sleeve, and a first elastic sealing ring is abutted between the first insulating sleeve and the second insulating sleeve, and the first elastic sealing ring is coaxial with the main body tube.

[0007] The torque wrench is provided with two insulating sleeves to make it have good insulation performance. Although this insulating structure can ensure the insulation performance of the torque wrench to a certain extent, this structure is more suitable for mechanical torque wrenches. For digital torque wrenches, since they have precision electronic components inside, and the electronic components must be connected to the torque sensor to collect the data of the torque sensor, in order to ensure the safety of the internal electronic components, the insulation performance of the torque sensor must be ensured. Utility Model Content

[0008] In order to ensure the insulation performance of the torque sensor and to ensure the safety of the electronic components in the digital torque wrench, the present application provides an insulating digital torque sensor.

[0009] The present application provides an insulated digital torque sensor that adopts the following technical solution:

[0010] An insulating digital torque sensor comprises a holder for mounting a ratchet, a sensor body and an insulating connector for insulatingly connecting the holder and the sensor body, wherein the insulating connector comprises a card plate and a latch, wherein there are two card plates and both are fixedly connected to one end of the holder, and the two card plates cooperate to form a slot, the latch is fixedly connected to one end of the sensor body, and the end of the latch facing away from the sensor body is inserted into the slot, the width of the latch is smaller than the width of the slot so that a first gap is formed between the latch and the two card plates, and a second gap is formed between the latch and the bottom of the slot, a first insulating layer is injection-molded in the first gap, a second insulating layer is injection-molded in the second gap, and the first insulating layer and the second insulating layer are connected.

[0011] Optionally, a third insulating layer is circumferentially covered on the two card boards, and a fourth insulating layer is circumferentially covered on the end side wall of the card board facing away from the card seat, the inner edge of the fourth insulating layer is connected to the first insulating layer, and the outer edge of the fourth insulating layer is connected to the third insulating layer.

[0012] Optionally, a first through hole is formed on the card board, and a second through hole is formed on the pin, the first through hole and the second through hole are coaxially arranged, and insulating columns are injection-molded in the first through hole and the second through hole, and the insulating columns pass through the two card boards, the pin and the first insulating layer in the first gap, and both ends are fixedly connected to the inner wall of the third insulating layer.

[0013] Optionally, both side walls of the latch are fixedly connected with protrusions, and the side walls of the two clamping plates close to each other are provided with grooves, the protrusions are sunk into the grooves, and the first gap is provided between the protrusions and the bottom of the grooves.

[0014] Optionally, one end of the latch pin facing away from the holder is fixedly connected to a force transmission column, and one end of the force transmission column facing away from the latch pin is fixedly connected to the sensor body.

[0015] Optionally, the width of the force transmission column is greater than the width of the latch, and a chamfered connection is formed at a connection between the force transmission column and the sensor body.

[0016] Optionally, a connecting column is fixedly connected to the base, one end of the connecting column is connected to the base, and the other end of the connecting column is connected to the card plate, and an annular groove is circumferentially formed on the connecting column.

[0017] Optionally, a fixing hole is provided on the sensor body, the fixing hole passes through the sensor body, and a countersunk groove is provided around the fixing hole.

[0018] Optionally, an axial groove is circumferentially provided on the side wall of the sensor body, and an annular groove is also circumferentially provided on the side wall of the sensor body, and the axial groove is communicated with the annular groove.

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

[0020] The torque sensor includes two parts, one of which is a holder for mounting a ratchet to connect with various sleeve structures, and a sensor body connected with the holder to directly obtain torque data. In order to ensure the strength of both, metal materials are generally required; this means that the holder directly connected to the workpiece or connected to the workpiece through a sleeve or other structure will also be charged. If the holder further transfers electricity to the sensor body, not only the sensor body is easily damaged, but also the remaining electronic components connected to the sensor body are easily damaged. The insulating connector additionally provided in the present application, on the one hand, seals and fills the gap between the holder and the sensor body, and on the other hand, ensures good transmission of torque through the cooperation of two card plates and the pin. Therefore, the torque sensor in the present application can not only ensure insulation performance, but also ensure that the torque sensor obtains accurate torque data;

[0021] The third insulating layer can ensure the insulation performance of the entire insulating connector on the one hand, and on the other hand, covering the card plate and the latch can further improve the connection stability between the two, thereby further ensuring that the torque sensor obtains accurate torque data;

[0022] The insulating connector made of insulating materials with relatively low strength is prone to twisting and deformation when transmitting torque. In the present application, a through-hole structure is opened on the card plate and the plug and sealed and filled in the through-hole, so that the first insulating layer and the third insulating layer are fixedly connected through the insulating column structure, so that the first insulating layer and the third insulating layer are connected as a whole, so as to greatly reduce the possibility of twisting and deformation of the insulating material when transmitting torque, so as to ensure good insulation performance and accuracy of torque transmission;

[0023] Further, a protrusion is arranged on the latch pin and a corresponding groove structure is provided on the card plate, which can improve the connection stability between the insulating connectors, thereby improving the insulation stability and the torque transmission accuracy;

[0024] By further providing a connecting column and controlling the connecting column to have an annular groove, the installation of the card holder can be positioned, the installation stability of the card holder can be improved, and the torque can be transmitted to the sensor body more accurately; and by providing a fixing hole, an axial card groove and annular card groove and other structures on the sensor body, the sensor body can be positioned and installed, and due to the lever principle, the sensor body is subjected to a large torque, so the additional multiple positioning and installation structures can ensure its installation stability;

[0025] Due to the principle of leverage, the farther away from the card seat, the greater the force applied. In the present application, a force transmission column structure is specially set between the pin and the sensor body, and the width of the connecting column is controlled to be larger than the width of the pin, and a chamfered connection is formed at the connection between the force transmission column and the sensor body. The connecting column with a wider width can reduce the possibility of deformation under pressure, and the chamfered setting can reduce the possibility of fracture between the force transmission column and the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of the overall structure of the embodiment of the present application.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. socket; 11. connecting column; 12. annular groove; 2. sensor body; 21. fixing hole; 22. countersunk groove; 23. axial slot; 24. circumferential slot; 3. insulating connector; 31. clamping plate; 32. slot; 33. latch; 34. protrusion; 35. groove; 36. first through hole; 37. second through hole; 381. first insulating layer; 382. second insulating layer; 383. third insulating layer; 384. fourth insulating layer; 385. insulating column; 4. force transmission column. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses an insulated digital torque sensor, comprising a holder 1 for mounting a ratchet, a sensor body 2, and an insulating connector 3 for insulatingly connecting the holder 1 and the sensor body 2.

[0032] The card holder 1 is made of metal and has a connecting column 11 integrally cast at one end. An annular groove 12 is provided on the peripheral side wall of the connecting column 11 in the circumferential direction. When the card holder 1 is installed, the annular groove 12 can improve the installation stability of the card holder 1. The sensor body 2 has two fixing holes 21, both of which penetrate the sensor body 2 and are arranged at intervals along the axial direction of the sensor body 2. The sensor body 2 around the fixing holes 21 also has countersunk grooves 22, which are connected to the fixing holes 21. The fixing holes 21 are used to stably install the sensor body 2.

[0033] An axial groove 23 is provided on the side wall of the sensor body 2 along the circumferential direction. There are two axial grooves 23, which are respectively provided on both sides of the axial direction of the sensor body 2. An annular groove 24 is also provided on the side wall of the sensor body 2 along the circumferential direction. The axial groove 23 is connected to the annular groove 24, and the annular groove 24 is located between the two fixing holes 21. The axial groove 23 and the annular groove 24 are both used for positioning and clamping the sensor body 2 to improve the installation stability of the sensor body 2.

[0034] The insulating connector 3 includes a card plate 31 and a plug 33. There are two card plates 31 and both are fixedly connected to one end of the card holder 1. The two card plates 31 cooperate to form a card slot 32. The plug 33 is fixedly connected to one end of the sensor body 2. The end of the plug 33 facing away from the sensor body 2 is inserted into the card slot 32.

[0035] The width of the latch 33 is smaller than the width of the card slot 32, so that a first gap is formed between the latch 33 and the two card plates 31, and a second gap is formed between the latch 33 and the bottom of the card slot 32. A first insulating layer 381 is injection-molded in the first gap, and a second insulating layer 382 is injection-molded in the second gap. The first insulating layer 381 and the second insulating layer 382 are injection-molded as one piece.

[0036] The side walls of both sides of the latch 33 are fixedly connected with protrusions 34. The side walls of the two clamping plates 31 close to each other are provided with grooves 35. The protrusions 34 are sunk into the grooves 35. There is the aforementioned first gap between the protrusions 34 and the bottom of the grooves 35.

[0037] The two card plates 31 are circumferentially covered with a third insulating layer 383 , and the end side wall of the card plate 31 facing away from the card seat 1 is circumferentially covered with a fourth insulating layer 384 , the inner edge of the fourth insulating layer 384 is connected to the first insulating layer 381 , and the outer edge of the fourth insulating layer 384 is connected to the third insulating layer 383 .

[0038] A first through hole 36 is formed on the card board 31, and a second through hole 37 is formed on the plug 33. The first through hole 36 and the second through hole 37 are coaxially arranged, and an insulating column 385 is injection-molded in the first through hole 36 and the second through hole 37. The insulating column 385 passes through the two card boards 31, the plug 33, and the first insulating layer 381 in the first gap, and both ends are integrally injection-molded with the inner wall of the third insulating layer 383. The insulating column 385 is used to integrally connect the first insulating layer 381 and the third insulating layer 383 to improve the stability between the two.

[0039] The end of the latch 33 away from the card holder 1 is fixedly connected with a force transmission column 4, and the end of the force transmission column 4 away from the latch 33 is fixedly connected to the sensor body 2. The width of the force transmission column 4 is greater than the width of the latch 33, and the connection between the force transmission column 4 and the sensor body 2 forms a chamfered connection.

[0040] 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. An insulated digital torque sensor, characterized in that: The invention comprises a holder (1) for mounting a ratchet, a sensor body (2), and an insulating connector (3) for insulatingly connecting the holder (1) and the sensor body (2), wherein the insulating connector (3) comprises a card plate (31) and a latch (33), wherein two card plates (31) are fixedly connected to one end of the holder (1), and the two card plates (31) cooperate to form a card slot (32), and the latch (33) is fixedly connected to one end of the sensor body (2), and the latch (33) faces away from the sensor body. One end of the card slot (2) is inserted into the card slot (32), the width of the latch (33) is smaller than the width of the card slot (32), so that a first gap is formed between the latch (33) and the two card plates (31), and a second gap is formed between the latch (33) and the bottom of the card slot (32), a first insulating layer (381) is injection-molded in the first gap, a second insulating layer (382) is injection-molded in the second gap, and the first insulating layer (381) and the second insulating layer (382) are connected.

2. The insulated digital torque sensor according to claim 1, characterized in that: The two card plates (31) are circumferentially covered with a third insulating layer (383), and the end side wall of the card plate (31) facing away from the card seat (1) is circumferentially covered with a fourth insulating layer (384), the inner edge of the fourth insulating layer (384) is connected to the first insulating layer (381), and the outer edge of the fourth insulating layer (384) is connected to the third insulating layer (383).

3. The insulated digital torque sensor according to claim 2, characterized in that: The card plate (31) is provided with a first through hole (36), the latch pin (33) is provided with a second through hole (37), the first through hole (36) and the second through hole (37) are coaxially arranged, and insulating columns (385) are injection-molded in the first through hole (36) and the second through hole (37), the insulating columns (385) penetrate the two card plates (31), the latch pin (33) and the first insulating layer (381) in the first gap, and both ends of the insulating columns are fixedly connected to the inner wall of the third insulating layer (383).

4. The insulated digital torque sensor according to claim 1, characterized in that: Both side walls of the latch pin (33) are fixedly connected with protrusions (34), and the side walls of the two clamping plates (31) close to each other are provided with grooves (35), the protrusions (34) are sunk into the grooves (35), and the first gap is provided between the protrusions (34) and the bottom of the grooves (35).

5. The insulated digital torque sensor according to claim 1, characterized in that: One end of the latch pin (33) facing away from the holder (1) is fixedly connected to a force transmission column (4), and one end of the force transmission column (4) facing away from the latch pin (33) is fixedly connected to the sensor body (2).

6. The insulated digital torque sensor according to claim 5, characterized in that: The width of the force transmission column (4) is greater than the width of the latch (33), and a chamfered connection is formed at a connection between the force transmission column (4) and the sensor body (2).

7. The insulated digital torque sensor according to claim 1, characterized in that: A connecting column (11) is fixedly connected to the card base (1), one end of the connecting column (11) is connected to the card base (1), the other end of the connecting column (11) is connected to the card plate (31), and an annular groove (12) is circumferentially formed on the connecting column (11).

8. The insulated digital torque sensor according to claim 1, characterized in that: The sensor body (2) is provided with a fixing hole (21), the fixing hole (21) passes through the sensor body (2), and a countersunk groove (22) is provided around the fixing hole (21).

9. The insulated digital torque sensor according to claim 1, characterized in that: An axial groove (23) is circumferentially provided on the side wall of the sensor body (2), and an annular groove (24) is also circumferentially provided on the side wall of the sensor body (2), wherein the axial groove (23) is in communication with the annular groove (24).

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