Explosion-proof preset torque wrench

Abstract

The utility model discloses an anti-explosion preset type torque wrench which comprises a wrench head, a connecting rod is installed at one end of the wrench head, scales are arranged at one end of the outer wall of the connecting rod, a handle is installed at the end of the connecting rod and is of a hollow structure, and adjusting mechanisms are installed inside and outside the handle. The adjusting mechanism is used for adjusting the overall length of the torque wrench, the adjusting mechanism comprises an adjusting rod assembly and a shell assembly, the adjusting rod can be pulled out towards the outer portion of the handle by arranging the adjusting mechanism, enabling the clamping block and the clamping groove in the separated state to relieve movement limiting on the adjusting rod, and therefore the overall length of the torque wrench is increased. And the clamping block in the clamped state and the other clamping groove lock and limit movement of the adjusting rod, so that the adjusting rod cannot move, the overall length of the torque wrench can be adjusted according to the actual use condition, and an operator can conveniently operate and adjust the torque wrench.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to an explosion-proof preset torque wrench. Background Art

[0002] Torque wrenches can be divided into electric torque wrenches, pneumatic torque wrenches, hydraulic torque wrenches and manual torque wrenches according to the power source. When the tightness of screws and bolts is critical, a torque wrench can be used to allow the operator to apply a specific torque value. When the tightening torque of the fastener reaches the preset value, it can automatically send out a signal "click" accompanied by a noticeable hand vibration, indicating that the work is completed.

[0003] The handle length of the existing explosion-proof preset torque wrench is fixed, resulting in a limit on the magnitude of the applied torque. When a larger torque needs to be applied, the operator has to operate it with more effort. Torque is the product of force and distance. When a larger torque needs to be applied, the operator's strength is constant, and the magnitude of the torque needs to be increased by changing the distance. Therefore, a structure with an explosion-proof preset torque wrench with an adjustable handle length is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide an explosion-proof preset torque wrench to solve the problem in the above background art that the handle of the explosion-proof preset torque wrench is a fixed structure and cannot be adjusted in length.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an explosion-proof preset torque wrench, comprising a wrench head, a connecting rod mounted on one end of the wrench head, a scale provided on one end of the outer wall of the connecting rod, a handle mounted on the end of the connecting rod, the handle being a hollow structure, and adjustment mechanisms mounted inside and outside the handle, the adjustment mechanisms being used to adjust the overall length of the torque wrench;

[0006] The adjustment mechanism includes an adjustment rod assembly and a housing assembly;

[0007] The adjusting rod assembly is used to adjust the overall length of the torque wrench;

[0008] The housing assembly is used to protect the adjusting rod assembly.

[0009] Preferably, the adjusting rod assembly includes a card slot, a card block, an adjusting rod, a bar slot, a pressing plate, a telescopic rod and a spring;

[0010] The telescopic rod includes a sleeve and a sliding rod, and the sliding rod is slidably connected to the inner cavity of the sleeve;

[0011] The card slot is opened on the outer wall of the handle and passes through it completely, the adjusting rod is slidably connected to the inner cavity of the handle and extends to the outside thereof, the strip groove is opened on the outer wall of the adjusting rod, the sleeve is fixedly connected to the inner wall of the strip groove, the spring is sleeved on the outer wall of the telescopic rod, and the two ends of the spring are respectively fixedly connected to the sleeve and the sliding rod, the pressing plate is fixedly connected to the end of the sliding rod, and the card block is fixedly connected to one end of the pressing plate.

[0012] Preferably, there are multiple slots and they are evenly distributed, the card block in the aligned state is engaged with one of the slots, and the card block in the engaged state and one of the slots are used to lock and limit the movement of the adjusting rod.

[0013] Preferably, the telescopic rod and spring in the compressed state are used to drive the block to move downward through the press plate, and the telescopic rod and spring in the reset state are used to drive the block to move upward through the press plate.

[0014] Preferably, the housing assembly includes a housing, a torsion spring and a connecting shaft;

[0015] The connecting shaft is formed on the inner wall of the shell and is rotatably connected to the adjusting rod. The two ends of the torsion spring are respectively engaged with the shell and the adjusting rod, and the twisted torsion spring is used to drive the shell to rotate inward and reset.

[0016] Preferably, the shell is in a semicircular structure, and in a reset state, the shell is sleeved on the outside of the handle, and the inner wall diameter of the shell is larger than the outer wall diameter of the handle.

[0017] Compared with the prior art, the beneficial effect of the present invention is that by setting an adjustment mechanism, the separated card block and a card slot release the movement limit of the adjustment rod, and the adjustment rod can be pulled out to the outside of the handle, thereby increasing the overall length of the torque wrench, and the engaged card block and another card slot lock and limit the movement of the adjustment rod, so that the adjustment rod cannot move, and the overall length of the torque wrench can be adjusted according to actual usage conditions, and it is convenient for the operator to operate and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the adjustment mechanism of the utility model;

[0020] Figure 3 For the utility model Figure 3 Schematic diagram of the A structure;

[0021] Figure 4 This is a schematic cross-sectional view of the handle and adjustment rod of the present invention.

[0022] In the figure: 1. spanner; 2. connecting rod; 3. scale; 4. handle; 5. adjustment mechanism; 501. slot; 502. block; 503. adjustment rod; 504. strip groove; 505. press plate; 506. housing; 507. torsion spring; 508. connecting shaft; 509. telescopic rod; 5010. spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The utility model provides a technical solution for an explosion-proof preset torque wrench: an explosion-proof preset torque wrench, comprising a wrench head 1, a connecting rod 2 is installed at one end of the wrench head 1, a scale 3 is provided at one end of the outer wall of the connecting rod 2, a handle 4 is installed at the end of the connecting rod 2, the handle 4 is a hollow structure, and an adjustment mechanism 5 is installed inside and outside the handle 4, and the adjustment mechanism 5 is used to adjust the overall length of the torque wrench;

[0025] The adjustment mechanism 5 includes an adjustment rod assembly and a housing assembly;

[0026] The adjusting rod assembly is used to adjust the overall length of the torque wrench;

[0027] The housing assembly is used to protect the adjusting rod assembly.

[0028] Please refer to Figure 4 The adjusting rod assembly includes a card slot 501, a card block 502, an adjusting rod 503, a strip groove 504, a pressing plate 505, a telescopic rod 509 and a spring 5010;

[0029] The telescopic rod 509 includes a sleeve and a sliding rod, and the sliding rod is slidably connected to the inner cavity of the sleeve;

[0030] The card slot 501 is opened on the outer wall of the handle 4 and passes through it completely. The adjusting rod 503 is slidably connected to the inner cavity of the handle 4 and extends to the outside. The strip groove 504 is opened on the outer wall of the adjusting rod 503. The sleeve is fixedly connected to the inner wall of the strip groove 504. The spring 5010 is sleeved on the outer wall of the telescopic rod 509, and the two ends of the spring 5010 are respectively fixedly connected to the sleeve and the sliding rod. The pressing plate 505 is fixedly connected to the end of the sliding rod, and the card block 502 is fixedly connected to one end of the pressing plate 505.

[0031] In this embodiment, by pressing the pressing plate 505 again with the hand, downward pressure is applied to the pressing plate 505, and this pressure is transmitted to the telescopic rod 509 and the spring 5010. Then, the telescopic rod 509 and the spring 5010 in the compressed state drive the clamping block 502 to move downward through the pressing plate 505. The clamping block 502 in the descending state is pulled out from the inside of a clamping slot 501. Then, the clamping block 502 and the clamping slot 501 in the separated state release the movement limit of the adjusting rod 503. At this time, the adjusting rod 503 is pulled out to the outside of the handle 4, thereby increasing the overall length of the torque wrench.

[0032] Please refer to Figure 4 The number of the card slots 501 is multiple and they are evenly distributed. The card block 502 in the aligned state is engaged with one card slot 501 , and the card block 502 in the engaged state and one card slot 501 are used to lock and limit the movement of the adjustment rod 503 .

[0033] In this embodiment, by inserting the raised clamping block 502 into another clamping slot 501 , the clamping block 502 in the engaged state and one clamping slot 501 lock and limit the movement of the adjusting rod 503 , so that the adjusting rod 503 cannot move.

[0034] Please refer to Figure 4 The telescopic rod 509 and the spring 5010 in the compressed state are used to drive the block 502 to move downward by pressing the plate 505, and the telescopic rod 509 and the spring 5010 in the reset state are used to drive the block 502 to move upward by pressing the plate 505.

[0035] In this embodiment, by loosening the pressing plate 505 by hand, the telescopic rod 509 and the spring 5010 in the reset state drive the clamping block 502 to move upward through the pressing plate 505 , and the clamping block 502 in the raised state is inserted into the inside of another clamping slot 501 .

[0036] Please refer to Figure 3 , the housing assembly includes a housing 506, a torsion spring 507 and a connecting shaft 508;

[0037] The connecting shaft 508 is formed on the inner wall of the shell 506, and the connecting shaft 508 is rotatably connected to the adjustment rod 503. The two ends of the torsion spring 507 are respectively engaged with the shell 506 and the adjustment rod 503, and the twisted torsion spring 507 is used to drive the shell 506 to rotate inward and reset.

[0038] In this embodiment, the housing 506 is rotated outward with the connecting shaft 508 as the center by hand, and the torsion spring 507 is squeezed, and the housing 506 is rotated outward to expose the handle 4 and the adjusting rod 503.

[0039] Please refer to Figure 2 The shell 506 has a semicircular structure. The shell 506 in the reset state is sleeved on the outside of the handle 4, and the inner wall diameter of the shell 506 is larger than the outer wall diameter of the handle 4.

[0040] In this embodiment:

[0041] Please refer to the figure in particular. The housing 506 in the reset state is sleeved on the outside of the handle 4, thereby protecting the pressing plate 505 and preventing the adjusting rod 503 from being easily moved due to accidental squeezing of the pressing plate 505.

[0042] Working principle: When the overall length of the torque wrench needs to be increased, first the hand rotates the shell 506 outward with the connecting shaft 508 as the center, and squeezes the torsion spring 507. The outer shell 506 is rotated outward to expose the handle 4 and the adjusting rod 503. At this time, the hand presses the pressing plate 505 again, applies downward pressure to the pressing plate 505, and transmits this pressure to the telescopic rod 509 and the spring 5010. The telescopic rod 509 and the spring 5010 in the compressed state drive the block 502 to move downward through the pressing plate 505. The card block 502 in the descending state is pulled out from the inside of a card slot 501. The card block 502 in the separated state and a card slot 501 release the movement limit of the adjusting rod 503. At this time, the adjusting rod 503 is pulled out to the outside of the handle 4, thereby increasing the overall length of the torque wrench. When the adjusting rod 503 has finished moving, the card block 502 is aligned with the other card slot 501, and the hand loosens the pressing plate 505, so that the telescopic rod 509 and the spring 5010 in the reset state drive the card block 502 to move upward through the pressing plate 505, and the rising card block 502 is inserted into the inside of the other card slot 501, and the engaged card block 502 and the other card slot 501 lock the movement of the adjusting rod 503, so that the adjusting rod 503 cannot move, and the hand loosens the shell 506, so that the pressure of the torsion spring 507 disappears, and the twisted torsion spring 507 drives the shell 506 to rotate inward and reset, and the reset shell 506 is sleeved on the outside of the handle 4, thereby protecting the pressing plate 505 and avoiding the situation that the adjusting rod 503 is easily moved due to the accidental squeezing of the pressing plate 505.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof preset torque wrench, comprising a wrench head (1), one end of the wrench head (1) is mounted with a connecting rod (2), one end of the outer wall of the connecting rod (2) is provided with a scale (3), and the end of the connecting rod (2) is mounted with a handle (4), characterized in that: The handle (4) is a hollow structure, and an adjustment mechanism (5) is installed inside and outside the handle (4), and the adjustment mechanism (5) is used to adjust the overall length of the torque wrench; The adjustment mechanism (5) comprises an adjustment rod assembly and a housing assembly; The adjusting rod assembly is used to adjust the overall length of the torque wrench; The housing assembly is used to protect the adjusting rod assembly.

2. The explosion-proof preset torque wrench according to claim 1, characterized in that: The adjusting rod assembly comprises a clamping slot (501), a clamping block (502), an adjusting rod (503), a strip groove (504), a pressing plate (505), a telescopic rod (509) and a spring (5010); The telescopic rod (509) comprises a sleeve and a sliding rod, wherein the sliding rod is slidably connected to the inner cavity of the sleeve; The card slot (501) is opened on the outer wall of the handle (4) and completely penetrates it, the adjusting rod (503) is slidably connected to the inner cavity of the handle (4) and extends outward thereof, the strip groove (504) is opened on the outer wall of the adjusting rod (503), the sleeve is fixedly connected to the inner wall of the strip groove (504), the spring (5010) is sleeved on the outer wall of the telescopic rod (509), and the two ends of the spring (5010) are respectively fixedly connected to the sleeve and the sliding rod, the pressing plate (505) is fixedly connected to the end of the sliding rod, and the card block (502) is fixedly connected to one end of the pressing plate (505).

3. The explosion-proof preset torque wrench according to claim 2, characterized in that: The number of the card slots (501) is multiple and equidistantly distributed; the card block (502) in an aligned state is engaged with one of the card slots (501); and the card block (502) and one of the card slots (501) in the engaged state are used to lock and limit the movement of the adjustment rod (503).

4. The explosion-proof preset torque wrench according to claim 2, characterized in that: The telescopic rod (509) and the spring (5010) in the compressed state are used to drive the clamping block (502) to move downward through the pressing plate (505), and the telescopic rod (509) and the spring (5010) in the reset state are used to drive the clamping block (502) to move upward through the pressing plate (505).

5. The explosion-proof preset torque wrench according to claim 2, characterized in that: The housing assembly includes a housing (506), a torsion spring (507) and a connecting shaft (508); The connecting shaft (508) is formed on the inner wall of the shell (506), and the connecting shaft (508) is rotatably connected to the adjusting rod (503). The two ends of the torsion spring (507) are respectively engaged with the shell (506) and the adjusting rod (503), and the twisted torsion spring (507) is used to drive the shell (506) to rotate inward and reset.

6. The explosion-proof preset torque wrench according to claim 5, characterized in that: The shell (506) has a semicircular structure. In a reset state, the shell (506) is sleeved on the outside of the handle (4), and the inner wall diameter of the shell (506) is larger than the outer wall diameter of the handle (4).

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