TWI715360B - Torque wrench structure - Google Patents

Abstract

A torque wrench structure includes a handle in a round bar shape and internally defined with a receiving groove from one end thereof, a ratchet arranged in the receiving groove and provided with an inner peripheral surface having a plurality of locking grooves and an outer peripheral surface relative to the inner peripheral surface, a mandrel pivoted to the handle, has one end provided with a driving part and the other end inserted in the receiving groove and the ratchet, the mandrel is defined with a groove having a notch that faces the inner peripheral surface and a bottom, a bounce device has a spring and an elastic element, the spring has a first end abutted against the bottom and a second end opposite to the first end, the elastic member has a first section and a second section which are connected in sequence.

Description

Torque wrench structure

The present invention relates to a torque wrench, and particularly relates to a torque wrench capable of generating a prompt sound when the grip is rotated.

Commonly-known torque wrench related patent cases such as Taiwan Patent Certificate No. M492808 or U.S. Patent Case No. US8863624B2, however, the technical means disclosed in the aforementioned cases cannot emit any prompt sound when adjusting the rotation of the grip, and there is no way to let the user Effectively understand the current torque value status of the torque wrench, which causes inconvenience in operation.

For this reason, a torque wrench with a prompt sound has appeared in the industry. However, the prompt sound of the aforementioned torque wrench is weak and inconspicuous, and cannot effectively achieve the effect of reminding users. For this reason, a torque wrench with obvious prompt sound is urgently needed .

The invention provides a torque wrench structure, the main purpose of which is to provide a clear prompt sound when adjusting the rotation of the handle.

To achieve the foregoing objective, the torque wrench structure of the present invention includes: a handle having a relatively closed end and an open end, the open end is recessed with a receiving groove; A ratchet piece is arranged in the accommodating groove, the ratchet piece has an inner circumferential surface and an outer circumferential surface opposite to each other, and the inner circumferential surface is provided with a plurality of clamping grooves; a spindle is combined with the handle, the One end of the mandrel is inserted into the accommodating groove and passes through the ratchet member, the mandrel has a groove, the groove has a notch, and the notch faces the ratchet member Peripheral surface; a resilient device with a spring and a resilient member, the spring has a first end and a second end opposite, the spring system surrounds a space, the first end of the spring against the concave A groove bottom of the groove, the elastic member has a first section and a second section connected in sequence, the first section penetrates through the space, and the other end of the second section and the first section has an abutment Part, the second end of the spring abuts against the second section, so that the abutment part abuts against the locking groove.

It can be seen from the foregoing that the present invention mainly sets the elastic device in the groove of the mandrel, and then pushes the elastic member through the spring, so that the spring has sufficient compression space and can provide sufficient elastic pre-force. The resilient member is provided so that the resilient member hits the inner peripheral surface of the ratchet member to form a clear prompt sound.

10: handle

10A: closed end

10B: open end

11: holding tank

20: Ratchet

21: inner peripheral surface

211: card slot

212: Convex Rib

22: Outer peripheral surface

30: Mandrel

32: Groove

321: Notch

322: groove bottom

33: Insert end

40: Bounce device

41: Spring

411: first end

412: second end

413: Space

42: elastic parts

421: first paragraph

422: second paragraph

423: Arrival

424: Convergence

X: axial

Y: radial

D1: first length

D2: second length

D3: third length

Figure 1 is a perspective view of the torque wrench structure of the present invention.

Figure 2 is an exploded view of the torque wrench structure of the present invention.

Figure 3 is a cross-sectional view of the torque wrench structure of the present invention.

Figure 4 is a partial enlarged view of the torque wrench structure of the present invention.

Figure 5 is an exploded view of another embodiment of the torque wrench structure of the present invention.

The present invention provides a torque wrench structure, in one of the embodiments, please refer to Figures 1 to 4, including: a handle 10, the handle 10 is in the shape of a round rod, the handle 10 has a relatively closed end 10A and a An open end 10B, the handle 10 is recessed inwardly from the open end 10B with an accommodating groove 11; a ratchet member 20 is disposed in the accommodating groove 11, and the ratchet member 20 has an opposite inner peripheral surface 21 And an outer peripheral surface 22. In this embodiment, the outer peripheral surface 22 is a flat surface, the inner peripheral surface 21 is provided with a plurality of locking grooves 211, each of the locking grooves 211 is arranged in a ring shape, and each of the locking grooves 211 There is a rib 212 between the grooves 211. Preferably, the ratchet member 20 defines an axial direction X, and the extending direction of each locking groove 211 is parallel to the axial direction X; in this embodiment, please 2, the ratchet member 20 has a ring shape.

In another embodiment, referring to FIG. 5, the ratchet member 20 is in the shape of a hollow cylinder.

A mandrel 30 is combined with the handle 10, one end of the mandrel 30 is inserted into the accommodating groove 11 and passes through the ratchet member 20, and the mandrel 30 further has a groove 32, the concave The groove 32 has a notch 321 facing the inner peripheral surface 21 of the ratchet 20; in a preferred embodiment, one end of the spindle 30 inserted into the receiving groove 11 is a rod The shape further defines that one end of the spindle 30 inserted in the accommodating groove 11 is an insertion end 33, the insertion end 33 defines a radial Y, and the groove 32 is located in the insertion The end 33 extends along the radial direction Y of the insertion end 33; an elastic device 40 has a spring 41 and an elastic member 42, the spring 41 has an opposite first end 411 and a At the second end 412, the spring 41 surrounds a space 413, the spring 41 and the elastic member 42 are disposed in the groove 32, and the first end 411 of the spring 41 abuts against a bottom 322 of the groove 32 , The elastic member 42 has a first section 421 and a second section 422 connected in sequence, and the first section 421 penetrates the hollow Between 413, the other end of the second segment 422 connected with the first segment 421 has an abutting portion 423, and the second end 412 of the spring 41 abuts against the second segment 422, so that the abutting portion 423 is normally exposed from the notch 321 and abuts against the card slot 211.

Thereby, since one end of the spindle 30 is inserted into the accommodating groove 11 and penetrates the ratchet member 20, the abutting portion 423 abuts against the locking groove 211, and when the spindle 30 rotates At this time, the abutting portion 423 of the resilient member 42 is pressed against the rib 212, thereby compressing the spring 41, so that the resilient member 42 is partially retracted into the groove 32, and when the abutting portion 423 faces the other When the groove 211 is locked, the spring 41 elastically returns and pushes against the elastic member 42 so that part of the elastic member 42 is exposed in the groove 32 again. When the spring 41 is compressed and reset, the elastic member 42 The inner peripheral surface 21 of the ratchet 20 is repeatedly hit, and then an obvious bounce sound is emitted.

In a preferred embodiment, the first section 421 and the second section 422 of the resilient member 42 are both cylindrical, and the cross-sectional diameter of the second section 422 is larger than that of the first section 421, so that the second section 422 and the first section 421 are connected with an engagement surface 424, the engagement surface 424 faces the groove bottom 322, the second end 412 of the spring 41 abuts the engagement surface 424, so that the spring 41 contacts the engagement surface 424 Given the elasticity of the second section 422 exposed in the notch 321.

In a preferred embodiment, the diameter of the insertion end 33 is a first length D1, the depth of the groove 32 has a second length D2, and the ratio of the second length D2 to the first length D1 is about 0.7 ~0.8, it can be seen that since the depth of the groove 32 is more than half the diameter of the insertion end 33, the groove 32 has a sufficient depth to resonate the bounce sound, thereby enhancing the clarity of the bounce sound.

In a preferred embodiment, the depth of the groove 32 is the second length D2, the length of the elastic member 42 is a third length D3, and the ratio of the third length D3 to the second length D2 is about 1~ 0.67, take this It can be seen that the depth of the groove 32 is longer than that of the elastic member 42 or equal to the length of the elastic member 42 so that the elastic member 42 has sufficient displacement space in the groove 32 to generate sufficient bounce sound.

20: Ratchet

21: inner peripheral surface

211: card slot

212: Convex Rib

22: Outer peripheral surface

30: Mandrel

32: Groove

321: Notch

322: groove bottom

33: Insert end

40: Bounce device

41: Spring

411: first end

412: second end

413: Space

42: elastic parts

421: first paragraph

422: second paragraph

423: Arrival

424: Convergence

X: axial

Y: radial

D1: first length

D2: second length

D3: third length

Claims (8)

A torque wrench structure includes: a handle with a relatively closed end and an open end, the open end is concavely provided with an accommodating groove; a ratchet member is arranged in the accommodating groove, and the ratchet member has Relative to an inner peripheral surface and an outer peripheral surface, the inner peripheral surface is provided with a plurality of clamping grooves, each of the clamping grooves is arranged in a ring shape, and there is a convex rib between each of the clamping grooves; a spindle is connected to the Handle, one end of the mandrel is inserted into the accommodating groove and penetrates the ratchet member, the mandrel has a groove, the groove has a notch, and the notch faces the ratchet The inner peripheral surface of the piece; an elastic device having a spring and an elastic member, the spring and the elastic member are arranged in the groove, the spring has a first end and a second end opposite to each other, the spring The first end of the spring abuts against a bottom of the groove, and the second end of the spring abuts against the elastic member. The elastic member has an abutting portion so that the abutting portion abuts against the locking groove. For example, the torque wrench structure described in item 1 of the scope of patent application, wherein the spring surrounds a space, the elastic member has a first segment and a second segment connected in sequence, and the first segment penetrates In the space, the abutting portion is located at the other end where the second section and the first section are connected, and the second end of the spring abuts against the second section. According to the torque wrench structure described in item 1 of the scope of the patent application, the ratchet element defines an axial direction, and the extending direction of each locking groove is parallel to the axial direction. In the torque wrench structure described in item 1 of the scope of patent application, the outer peripheral surface is a flat surface. For the torque wrench structure described in item 1 of the scope of patent application, wherein one end of the mandrel inserted in the accommodating groove is rod-shaped, and one end of the mandrel inserted in the accommodating groove is a The insertion end portion, the groove is located at the insertion end portion and extends along the radial direction of the insertion end portion. For example, the torque wrench structure described in item 2 of the scope of patent application, wherein the first section and the second section of the elastic member are both cylindrical, and the cross-sectional diameter of the second section is larger than that of the first section, so that An engagement surface is connected between the second section and the first section, the engagement surface faces the groove bottom, and the second end of the spring abuts against the engagement surface. For the torque wrench structure described in item 5 of the scope of patent application, wherein the diameter of the insertion end is a first length, the depth of the groove has a second length, and the ratio of the second length to the first length is The ratio is about 0.7 to 0.8. The torque wrench structure described in item 1 of the scope of patent application, wherein the depth of the groove has a second length, the length of the elastic member is a third length, and the ratio of the third length to the second length About 1~0.67.

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