TWM532345U - Torque detection and calibration structure of torsion wrench - Google Patents

Description

Torque wrench torque value detection adjustment structure

This creation is related to the torque value detection and adjustment structure of a torque wrench with a simple adjustment of the detection value when detecting the factory torque value of a torque wrench.

Pressing, the torque wrench is a wrench tool for protecting the bolt or the nut. When the reaction force of the wrench turning the bolt or the nut exceeds the preset torque value, a detecting action can be formed to prevent the bolt or the nut from being applied. Excessive teething, disintegration or slippage, and can prevent problems that cannot be removed later. The existing torque wrench has a plurality of mechanisms for detecting the torque value, wherein the structure that deflects the compression spring when the block exceeds the torque value generates a warning sound, and has the advantage of setting the torque value more accurately, and is generally applied to the torque wrench. .

The use of a torque wrench with a square piece, such as the new patent case No. 135400 "Torque Wrench Button Locking Device", the setting of the torque value is the adjustable handle (4) on the thread (23) of the lever arm (2) The screw rotates to adjust the compression force of the push rod (34) against the spring (32). In the case where the compression rebound force of the spring (32) acts on the block seat (31), a block is formed through the block seat (31). The missing slot (35) and one end of the main arm (1) are provided with a notch (12) for clamping a square (3). When the output of the wrench head (11) exceeds the torque setting value, the main arm (1) has a missing slot ( 12) Between the end and the notch (35) of the block seat (31), a pressing force can be formed by the deflecting block (31) to act on the spring (3) 2) Upper, [the deflection force of the square (31) is greater than the compression force of the spring (32)], causing the main arm (1) notch (12) end to be offset from the notch (35) of the block (31) The wrong movement and impact on the inner edge of the lever arm (2) produces a warning sound, and the detection of the torque exceeding is obtained.

Although the above-mentioned conventional torque wrench has a good detection effect when the torque is exceeded, the accuracy of detecting the response timing is the same as whether the quality of the spring is uniform. The existing spring manufacturing ability, due to the difference in material composition or heat treatment conditions, does not easily require the quality to be completely consistent; the soft or hard spring will cause the torque value response (sounding) timing error, if at the factory When the error is detected before the error is detected, and the error value is greater than the allowable error value, the common method is to disassemble the wrench and replace the square of different thickness (ie, the spring is soft and replace the slightly thicker square, the spring is harder and replace the slightly thinner square) ), only the adjustment work of dismantling and replacing the squares may not be able to be adjusted or completed at one time. The complicated combination of wrench disassembly and assembly often consumes a lot of labor costs or man-hours in the inspection and adjustment work, and it is necessary to improve or innovate. .

The main purpose of the present invention is to provide a torque wrench torque detection and adjustment structure, which is a torque wrench, comprising a lever arm, a force applying rod, a square piece, a sliding seat, a spring and a grip group; The arm is a hollow tube body having a first end and a second end, the first end of the first end is provided with a pivot hole, and the end surface of the second end is provided with a threaded section; a swinging head; an output arm extending from one end of the swinging arm, the first end of the lever arm being inserted into the lever arm, having an outer end portion and an inner end portion, a gap is defined between the inner end of the inner end and the inner edge of the lever arm, and a concave slot is formed on the end surface thereof, and a through hole is formed on the outer end of the pivot hole of the lever arm. And a pin member passes through the through hole on the pivot hole, and the outer end portion of the output arm is pivoted on the first end of the lever arm; the block member, Attached in the lever arm, fit on a concave notch of the inner end of the output arm; the sliding seat is disposed in the lever arm, and one end is opposite to the concave slot of the output arm, forming a groove The groove is shared with the concave slot to clamp the block; the spring is disposed in the lever arm, and one end abuts against an end surface of the other end of the slider; the grip group has a a grip body pivotally coupled to the second end threaded section of the lever arm, the grip body being internally provided with a push rod penetrating into the interior of the second end of the lever arm, and the other end of the spring is supported by one end of the push rod Forming a pushing force, the screwing action of the grip body on the second end thread segment of the lever arm, adjusting the thrust of the spring to the sliding seat, and setting the output force of the force applying rod by the magnitude of the compressive elastic force of the spring The torque setting value is improved in that the inner end of the output arm of the urging rod is provided with a screw hole near the concave vacant slot, and a screw extending into the gap end is provided in the screw hole, and a through hole is formed on the body of the rod arm relative to the screw hole; when the assembly is completed The wrench uses the test stand to detect the torque value before leaving the factory. When the spring is due to softness or hardness, the torque value responds to the timing error. Only the screw turning tool is inserted into the through hole of the lever arm to perform the screw. The twisting operation, by extending the length of the screw outside the screw hole, can change the gap between the inner end of the force arm or the inner edge of the screw and the arm of the lever, so that the torsion force on the torsion force setting member causes the deflection movement to slide The squeezing action generated by the seat and the spring, that is, the speed of the inner end of the output arm or the inner edge of the screw striking the arm of the lever when the size of the gap changes, adjusting the quality error of the spring when squeezing the compression, and the torque of the torque wrench Detecting and achieving the benefits of simple factory adjustment.

The second objective of the present invention is to provide a torsion wrench torque value detection adjustment structure, wherein the screw hole inner screw on the inner end of the force output arm of the force application arm is a full-toothed hexagonal screw opposite to the lever arm. The through hole end has a hexagonal groove, and the hex wrench can be used to insert the tool from the through hole, and the screw is turned on the hexagonal groove to easily achieve One end of the screw extends out of the length of the screw hole.

10‧‧‧ rod arm

11‧‧‧ first end

110‧‧‧ pivot hole

12‧‧‧ second end

120‧‧ Thread segment

13‧‧‧ Pins

14‧‧‧through hole

20‧‧‧ struts

21‧‧‧ 掣 头部 头部

22‧‧‧Output arm

220‧‧‧Outside

221‧‧‧Inside

222‧‧‧Perforation

23‧‧‧ gap

24‧‧‧ concave vacant

25‧‧‧ screw holes

26‧‧‧ screws

260‧‧‧ hexagonal groove

30‧‧‧pieces

40‧‧‧Slide

41‧‧‧ Groove

50‧‧‧ Spring

60‧‧‧ grip group

61‧‧‧ grip body

62‧‧‧ push column

70‧‧‧ Screw turning tool

Figure 1 is an exploded view of the creation structure

Figure 2 is a cross-sectional structure of the creative combination

Figure 3 is an enlarged schematic view of the structure of Figure 2A

Fig. 4 is a schematic view showing the state in which the inner piece of the writing piece is deflected and the inner end of the arm is struck against the inner edge of the lever arm.

Figure 5 is a schematic diagram of the state when the screw is adjusted in this creation.

Figure 6 is a schematic diagram of the state in which the screw is finely adjusted and protruded outside the screw hole.

Figure 7 is a schematic view of the action of the inner edge of the striking lever arm when the screw state of Figure 6 is used for torque detection

Figure 8 is a schematic view showing the state in which the screw is extended beyond the screw hole.

Figure 9 is a schematic view of the action of the inner edge of the impact rod when the torque state of the screw is shown in Figure 8.

The present invention is directed to the above object, and the preferred embodiment is described in detail with reference to the accompanying drawings.

A torque wrench torque detection and adjustment structure, as shown in Figures 1, 2, and 3, is a torque wrench, including a lever arm 10, a force applying rod 20, a square member 30, a sliding seat 40, a spring 50 and a grip The arm member 10 is a hollow tube body having a first end 11 and a second end 12, and a proximal end portion of the first end 11 is provided with a pivot hole 110, the second end The end surface of the 12 is provided with a threaded section 120; the force applying rod 20 has a ratcheting head 21; one end of the tilting head 21 extends with a power output arm 22, and the power output arm 22 is supported by the lever arm 10 The first end 11 is inserted into the lever arm 10 and has an outer end 220 and an inner end portion 221, a gap 23 is defined between the outer end portion 221 and the inner edge of the lever arm 10, and a concave notch 24 is formed on the end surface thereof, and the outer end portion is provided The pivot hole 110 of the lever arm 10 is provided with a through hole 222, and a pin member 13 passes through the through hole 222 on the pivot hole 110, and the outer end portion 220 of the output arm 22 is pivoted thereon. The first end 11 of the lever arm 10; the block member 30 is disposed in the lever arm 10 and abuts against a concave notch 24 of the inner end portion 221 of the output arm 22; a groove 41 is formed in the rod arm 10 at one end opposite to the concave notch 24 of the output arm 22, and the groove 41 is sandwiched with the concave notch 24 to define the block member 30; the spring 50, the system is disposed in the lever arm 10, one end abuts against the end surface of the other end of the slider 40; the grip set 60 has a threaded portion 120 of the second end 12 of the lever arm 10 a grip body 61, the grip body 61 is internally provided with a push rod 62 penetrating into the second end 12 of the lever arm 10, and an end of the push rod 62 is pressed against the other end of the spring 50. The grip body 61 is in the The screwing action on the second end thread segment 120 of the arm 10 rotates, adjusts the thrust of the spring 50 to the sliding seat 40, and the magnitude of the compressive elastic force of the spring 10, and sets the output torque setting value of the force applying rod 20; The inner end portion 221 of the output arm 22 of the force applying rod 20 is provided with a screw hole 25 near the concave notch 24. The screw hole 25 is provided with a hole extending toward the end of the gap 23 (extension). The screw 26 is filled, and a through hole 14 is defined in the body portion of the rod arm 10 with respect to the screw hole 25; as shown in FIG. 2 and FIG. 4, when the assembled torque wrench is used, the test bench (not shown) is used for leaving the factory. The front torque value setting detection, regardless of whether the spring 50 is soft or hard, causes a torque value response (when the torque setting value is exceeded, the inner end portion 221 of the output arm 22 hits the inner edge of the lever arm 10 to give an audible alarm). (For example, if the torque setting is not reached, the sound will be emitted early or the torque will be exceeded. The set value is not sounded. As shown in Fig. 5, the screw 26 is only required to be twisted by inserting the screw turning tool 70 into the through hole 14 of the lever arm 10, as shown in Figs. The length outside the screw hole 25 can change the inner end portion 221 of the output arm 22 or the gap 23 or the gap between the screw 26 and the inner edge of the lever arm 10, so that, as shown in Figs. 7 and 9, the torque acting block member exceeding the torque setting value The squeezing motion of the slide 40 and the spring 50 is generated by the yaw movement on the 30, that is, when the size of the gap 23 is changed, the timing of the inner end 221 of the output arm 22 or the screw 26 striking the inner edge of the lever arm 10 is used as the timing of the sound. It is judged that the quality error of the spring 50 (refer to FIG. 2) during the compression process is accurately adjusted, and the torque detection of the torque wrench is detected, and the benefits of simple adjustment of the factory are achieved.

According to the above embodiment, in FIG. 1, 2, and 3, the screw 26 in the screw hole 25 on the inner end portion 221 of the output arm 22 of the force applying arm 20 is a full-tooth hex screw opposite to the lever arm 10 The end of the through hole 14 has a hexagonal groove 260. As shown in FIG. 5, the hex wrench can be used to insert the tool 70 from the through hole 14, and the screw 26 is pulled over the hexagonal groove 260. As shown in Figures 6 and 8, the adjustment of the outer length of the screw hole 26 (i.e., the gap 23 or the distance between the screw 25 and the inner edge of the lever arm 10) is simply achieved.

The above description is intended to be illustrative, and not restrictive, and many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention. , but all will fall within the scope of this creation.

10‧‧‧ rod arm

14‧‧‧through hole

20‧‧‧ struts

22‧‧‧Output arm

221‧‧‧Inside

23‧‧‧ gap

24‧‧‧ concave vacant

25‧‧‧ screw holes

26‧‧‧ screws

260‧‧‧ hexagonal groove

30‧‧‧pieces

40‧‧‧Slide

41‧‧‧ Groove

Claims (2)

A torque wrench torque detection and adjustment structure is a torque wrench, comprising a lever arm, a force applying rod, a square member, a sliding seat, a spring and a grip group; the lever arm is a hollow tubular body a first end and a second end, the first end of the first end is provided with a pivot hole, the end surface of the second end is provided with a threaded section; the urging rod has a swaying head; An output arm extends from one end of the swinging arm, and the output arm is inserted into the lever arm by a first end of the lever arm, and has an outer end portion and an inner end portion, and the outer end portion is connected to the outer end portion A gap is reserved between the inner edges of the lever arm, and a concave slot is formed on the end surface thereof. The outer end portion is provided with a through hole corresponding to the pivot hole of the lever arm, and a pin member is disposed at the pivot The through hole passes through the through hole, and the outer end portion of the output arm is pivoted on the first end of the lever arm; the block member is fixed in the lever arm and fits into the concave end of the inner end of the output arm The sliding seat is disposed in the rod arm, and one end is opposite to the concave vacant groove of the output arm, forming a groove, and the groove is The concave notch cooperates to clamp the block member; the spring is assembled in the lever arm, and one end abuts against an end surface of the other end of the sliding seat; the grip group has a screw on the lever arm a grip body on the second end threaded section, the grip body is internally provided with a push rod penetrating into the second end of the rod arm, and one end of the push rod forms a push on the other end of the spring, which can be The screwing action of the grip body on the second end thread segment of the lever arm rotates, adjusts the thrust of the spring to the sliding seat, and sets the output torque setting value of the force applying rod by the magnitude of the compressive elastic force of the spring; The improvement is that the inner end of the output arm of the urging rod is provided with a screw hole near the concave vacant slot, and a screw extending into the gap end is provided in the screw hole, and the rod arm tube is a through hole is arranged on the body portion; when the assembled torque wrench uses the test stand to perform the detection of the torque value before leaving the factory, no matter whether the spring is due to softness or hardness, the torque value responds to the timing error. Only need to use the screw turning tool to embed this The screw through-hole of the arms for twisting operation, by a screw extending the length of the outer screw, the gap size can be changed within the inner arm with the screw end or edge of the lever arm, thus, the torque exceeds the set torque value The squeezing motion of the action block on the sliding seat and the spring, that is, the speed of the inner end of the output arm or the inner edge of the screw striking the arm of the lever when the gap size changes, adjusting the compression of the spring when the spring is squeezed The quality error enables the torque test of the torque wrench to achieve the benefits of simple factory adjustment. The torsion force detecting and adjusting structure according to the first aspect of the patent application scope, wherein the screw in the inner end of the output arm of the force applying arm is a full-toothed hexagonal screw opposite to the arm The through hole end has a hexagonal groove, and the hex wrench can be used to embed the tool from the through hole, and the screw is turned on the hexagonal groove to easily extend the length of the screw end. Adjustment.