Handheld digital display torque wrench for fastening bolt

Abstract

The utility model discloses a handheld digital display torque wrench for fastening bolts, which relates to the technical field of torque wrenches and comprises a wrench body and a wrench head, a clamping groove is arranged at the top of the wrench head, an abutting plate is fixed on the outer surface of the wrench head, and an inserting rod is fixed on the outer surface of the abutting plate. The wrench body is sleeved with an operating sleeve, the outer surface of the operating sleeve is connected with a spring, a limiting plate is fixed to the back of the wrench body, and the inner wall of the wrench body is connected with a clamping block. Through the arrangement of the operating sleeve, the spring, the clamping block, the clamping groove, the abutting plate, the inserting rod and the limiting plate, the operating sleeve is pulled towards the digital display screen, meanwhile, the spring is stressed and compressed, then the inserting rod is inserted into the wrench body, the clamping block is ejected open through the abutting plate, and therefore the wrench head can be attached to the wrench body conveniently; the wrench head is prevented from rotating; and meanwhile, the limiting structures are limited, so that the parts are not easy to fall off, and the parts are prevented from being lost.

Description

Technical Field

[0001] The utility model relates to the technical field of torque wrenches, in particular to a handheld digital display torque wrench for bolt tightening. Background Art

[0002] A wrench is a tool used to tighten and loosen bolts. There are many types of wrenches, including socket wrenches, adjustable wrenches, torque wrenches, electric wrenches, etc. On some precision instruments, if the bolts are tightened too tight, they are easy to break under the influence of external forces such as impact and vibration. If they are tightened too loosely, they are easy to fall off. Therefore, the torque needs to be set through a torque wrench. If it is a mechanical torque wrench, when the torque of the wrench reaches a certain value, it will make a "click" sound to remind the staff. If it is a digital torque wrench, the torque of the wrench head is monitored by a sensor. When the torque reaches a certain value, the sensor will send out an electrical signal to make the wrench alarm, and the torque size can be viewed on the digital display.

[0003] A digital torque wrench with application number 202323184894.8 comprises a rod handle and a handle plum blossom sleeve connected to each other, the outer surface of the rod handle is rotatably connected with a display mechanism, the outer surface of the rod handle is fixedly mounted with a positioning ring, one side of the positioning ring is rotatably connected with the display mechanism, and the rod handle is provided with a locking mechanism for positioning the display mechanism. The utility model can achieve basic wrench functions by setting the rod handle, the handle and the plum blossom sleeve, and the plum blossom sleeve can be separated from the rod handle, so that the corresponding plum blossom sleeve can be replaced for bolts of different sizes, and the display mechanism is rotatably mounted on the outer surface of the rod handle, and then the display angle of the display mechanism is rotated according to the operating environment, so that even in a working environment with obstacles, the display mechanism can still be directed to the operator, which is convenient for the operator to read, and the display mechanism after rotation can be positioned by using a locking mechanism, and the display mechanism will not be offset when the entire device is working.

[0004] The existing torque wrenches have many types of wrench heads when in use, such as adjustable wrench heads and ratchet wrench heads. Different wrench heads are used in different usage scenarios, or the wrench heads need to be replaced if they are damaged or worn. The existing torque wrench heads are usually inserted into the wrench body and the sensor through an insertion rod. A round hole is provided on the outer ring of the insertion rod. Then, the bolts are passed through the round holes on the wrench body and the insertion rod and tightened to complete the limiting operation. The operation is relatively cumbersome and requires rotating the bolts several times. At the same time, the bolts are small in size and easy to lose. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a handheld digital torque wrench for bolt tightening to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above object, the present utility model provides the following technical solution: A digital display torque wrench for handheld bolt tightening, comprising a wrench body and a wrench head. A clamping groove is formed at the top of the wrench head. A resisting plate is fixed on the outer surface of the wrench head, and a plug rod is fixed on the outer surface of the resisting plate. A control sleeve is sleeved outside the wrench body, and a spring is connected to the outer surface of the control sleeve. A limiting plate is fixed on the back of the wrench body, and a clamping block is connected to the inner wall of the wrench body.

[0007] By adopting the above technical solution, first pull the control sleeve towards the digital display screen direction, and at the same time the spring is compressed under force. Then insert the plug rod into the inside of the wrench body. The resisting plate pushes the clamping block open to facilitate the fitting of the wrench head and the wrench body. At the same time, since one end of the plug rod is square, the rotation of the wrench head is avoided. After the resisting plate fits with the wrench body, the clamping groove corresponds to the clamping block. Then release the control sleeve, and the control sleeve is driven by the spring to retreat and reset. At this time, the control sleeve presses the clamping block to press the clamping block into the clamping groove to limit the wrench head and prevent the wrench head from falling off. At the same time, the limiting plate prevents the control sleeve from being flung by the spring and causing the control sleeve to fall off.

[0008] Further, the resisting plate is frustum-shaped, and both the resisting plate and the control sleeve are in contact with the clamping block.

[0009] By adopting the above technical solution, the resisting plate pushes the clamping block open to facilitate the fitting of the wrench head and the wrench body. The control sleeve presses the clamping block to press the clamping block into the clamping groove to limit the wrench head.

[0010] Further, one end of the plug rod has a square cross-section, and the other end of the plug rod has a circular cross-section.

[0011] By adopting the above technical solution, the staff inserts the plug rod into the inside of the wrench body. At the same time, since one end of the plug rod is square, the rotation of the wrench head is avoided.

[0012] Further, the cross-section of the control sleeve is in the shape of "儿" (a Chinese character), and the control sleeve is slidably connected to the wrench body.

[0013] By adopting the above technical solution, the staff pulls the control sleeve towards the digital display screen direction, and at the same time the spring is compressed under force, thereby ending the limitation of the limiting block.

[0014] Further, the clamping block is rotatably connected to the wrench body, and the clamping block is in contact with the clamping groove. A plurality of clamping blocks are provided, and the plurality of clamping blocks are distributed in an annular array.

[0015] By adopting the above technical solution, the control sleeve presses the clamping block to press the clamping block into the clamping groove to limit the wrench head and prevent the wrench head from falling off.

[0016] Further, a digital display screen and control buttons are respectively installed at the top of the wrench body. A handle sleeve is sleeved on the outer surface of the wrench body. The wrench head is located behind the wrench body.

[0017] By adopting the above technical solution, the staff can set the torque through the control button. When the staff tightens the bolt to a certain torque through the torque wrench, the staff can check the current torque through the digital display screen, and the color of the digital display screen will change, for example, to red. Secondly, the wrench body will sound an alarm to remind the staff.

[0018] Furthermore, the handle cover is made of silicone material.

[0019] By adopting the above technical solution, the staff can place their hands on the handle to hold the wrench body, making it convenient to rotate the wrench body to tighten the bolt.

[0020] Furthermore, a sheath is connected between the operating sleeve and the wrench body, and the sheath is made of rubber material.

[0021] By adopting the above technical solution, the spring is shielded by the sheath, which can prevent dust and other impurities from adhering, prevent the staff's hands from entering the gap between the operating sleeve and the wrench body and causing crushing, and increase the aesthetics.

[0022] In summary, the utility model mainly has the following beneficial effects:

[0023] The utility model provides an operating sleeve, a spring, a clamping block, a clamping groove, a push plate, an insertion rod and a limit plate. The operating sleeve is first pulled in the direction of the digital display screen, and the spring is compressed at the same time. Then the insertion rod is inserted into the interior of the wrench body, and the clamping block is pushed open by the push plate to facilitate the fitting of the wrench head and the wrench body. At the same time, since one end of the insertion rod is square, the wrench head is prevented from rotating. After the push plate is fitted with the wrench body, the clamping groove and the clamping block correspond to each other. Then the operating sleeve is released and driven to retreat and reset by the spring. At this time, the operating sleeve presses the clamping block, so that the clamping block is pressed into the clamping groove to limit the wrench head and prevent the wrench head from falling off. At the same time, the limit plate prevents the operating sleeve from being thrown off by the spring. The disassembly and assembly operation is very convenient, and only requires pulling, inserting and releasing. At the same time, the limiting structures are all limited and not easy to fall off to prevent the loss of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the top-sectional structure of the control sleeve of the utility model;

[0026] Figure 3 This is a schematic diagram of the explosion structure of the wrench head of the utility model;

[0027] Figure 4 It is a schematic diagram of the explosion structure of the control sleeve of the utility model.

[0028] In the figure: 1. Wrench body; 2. Handle sleeve; 3. Digital display screen; 4. Control button; 5. Wrench head; 6. Sheath; 7. Operating sleeve; 8. Spring; 9. Block; 10. Card slot; 11. Counter board; 12. Insert rod; 13. Limit plate. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0030] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0031] Embodiment 1:

[0032] A digital display torque wrench for handheld bolt tightening, as Figure 1-Figure 4 shown, includes a wrench body 1 and a wrench head 5. A card slot 10 is opened at the top of the wrench head 5 to limit the wrench head 5 in cooperation with a block 9; a counter board 11 is fixed on the outer surface of the wrench head 5. The counter board 11 is frustum-shaped and abuts against the block 9. The counter board 11 pushes the block 9 open to facilitate the fitting of the wrench head 5 and the wrench body 1; an insert rod 12 is fixed on the outer surface of the counter board 11. One end of the insert rod 12 has a square cross-section and the other end has a circular cross-section. One end of the insert rod 12 is square, thus preventing the wrench head 5 from rotating;

[0033] An operating sleeve 7 is sleeved outside the wrench body 1. The cross-section of the operating sleeve 7 is in the shape of a "儿" character. The operating sleeve 7 is slidably connected to the wrench body 1 and abuts against the block 9. A spring 8 is connected to the outer surface of the operating sleeve 7. Pull the operating sleeve 7 towards the digital display screen 3, and at the same time, the spring 8 is compressed by the force; a limit plate 13 is fixed on the back of the wrench body 1. A block 9 is connected to the inner wall of the wrench body 1. The block 9 is rotatably connected to the wrench body 1 and abuts against the card slot 10. A plurality of blocks 9 are provided, and the plurality of blocks 9 are distributed in an annular array. The operating sleeve 7 is driven by the spring 8 to retreat and reset. At this time, the operating sleeve 7 presses the block 9 to press the block 9 into the card slot 10 to limit the wrench head 5 and prevent the wrench head 5 from falling off.

[0034] Refer to Figure 1 and Figure 2 , in the above embodiment, a digital display screen 3 and a control button 4 are respectively installed at the top of the wrench body 1 for convenient operation; a handle sleeve 2 is sleeved on the outer surface of the wrench body 1. The handle sleeve 2 is made of silicone material to increase the friction between the staff's hand and the wrench body 1 and reduce the pressure exerted by the wrench body 1 on the hand; the wrench head 5 is located behind the wrench body 1 for convenient tightening and loosening of bolts.

[0035] Embodiment 2:

[0036] On the basis of the above-mentioned embodiment 1, in order to prevent the spring 8 from crushing the hands of the staff and affecting the appearance, the following settings are adopted.

[0037] See also Figure 1 , Figure 2 and Figure 4 In the above embodiment, a sheath 6 is connected between the operating sleeve 7 and the wrench body 1. The sheath 6 is made of rubber material. The spring 8 is shielded by the sheath 6 to prevent dust and other impurities from adhering, to prevent the staff's hands from entering the gap between the operating sleeve 7 and the wrench body 1 and causing crushing injuries, and to increase the aesthetics.

[0038] The implementation principle of the utility model is as follows: first, according to the existing products, one end of the insert rod 12 of the wrench head 5 is not only located inside the wrench body 1, but also connected to the sensor inside the wrench head 5 body. Therefore, when the staff turns on the torque wrench, the torque of the wrench head 5 can be transmitted to the wrench body 1. The staff can set the torque through the control button 4. When the staff tightens the bolts through the torque wrench to a certain torque, the staff can view the current torque through the digital display screen 3, and the color of the digital display screen 3 will change, such as turning red. Secondly, the wrench body 1 will send an alarm to remind the staff;

[0039] When the wrench head 5 needs to be replaced, the staff pulls the operating sleeve 7 in the direction of the digital display screen 3, and then the staff directly pulls out the wrench head 5 to complete the disassembly operation. During installation, the staff first pulls the operating sleeve 7 in the direction of the digital display screen 3, and the spring 8 is compressed at the same time. Then the staff inserts the insertion rod 12 into the wrench body 1, and pushes the block 9 open through the abutment plate 11 to facilitate the fit of the wrench head 5 and the wrench body 1. At the same time, since one end of the insertion rod 12 is square, the wrench head 5 is prevented from rotating. After the abutment plate 11 is fitted with the wrench body 1, the slot 10 corresponds to the block 9, and then the operating sleeve 7 is released and driven by the spring 8 to retreat and reset. At this time, the operating sleeve 7 presses the block 9, thereby pressing the block 9 into the slot 10 to limit the wrench head 5 and prevent the wrench head 5 from falling off. At the same time, the limiting plate 13 is used to prevent the operating sleeve 7 from being flown by the spring 8 and causing the operating sleeve 7 to fall off.

[0040] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A handheld digital torque wrench for bolt tightening, comprising a wrench body (1) and a wrench head (5), characterized in that: A clamping groove (10) is formed at the top of the wrench head (5). A resisting plate (11) is fixed on the outer surface of the wrench head (5), and a plug rod (12) is fixed on the outer surface of the resisting plate (11). A control sleeve (7) is sleeved outside the wrench body (1), and a spring (8) is connected to the outer surface of the control sleeve (7). A limiting plate (13) is fixed on the back of the wrench body (1), and a clamping block (9) is connected to the inner wall of the wrench body (1).

2. The handheld digital torque wrench for bolt tightening according to claim 1, characterized in that: The resisting plate (11) is frustum-shaped, and both the resisting plate (11) and the control sleeve (7) are in contact with the clamping block (9).

3. The handheld digital torque wrench for bolt tightening according to claim 1, characterized in that: One end of the plug rod (12) has a square cross-section, and the other end of the plug rod (12) has a circular cross-section.

4. The handheld digital torque wrench for bolt tightening according to claim 2, characterized in that: The control sleeve (7) has a "儿"-shaped cross-section and is slidably connected to the wrench body (1).

5. The handheld digital torque wrench for bolt tightening according to claim 2, characterized in that: The clamping block (9) is rotatably connected to the wrench body (1) and is in contact with the clamping groove (10). A plurality of clamping blocks (9) are provided, and the plurality of clamping blocks (9) are distributed in an annular array.

6. The handheld digital torque wrench for bolt tightening according to claim 1, characterized in that: A digital display screen (3) and control buttons (4) are respectively installed at the top of the wrench body (1). A handle sleeve (2) is sleeved on the outer surface of the wrench body (1). The wrench head (5) is located behind the wrench body (1).

7. The handheld digital torque wrench for bolt tightening according to claim 6, characterized in that: The handle sleeve (2) is made of silica gel material.

8. The handheld digital torque wrench for bolt tightening according to claim 1, characterized in that: A protective sleeve (6) is connected between the control sleeve (7) and the wrench body (1), and the protective sleeve (6) is made of rubber material.

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