TWI747068B - Lockable torque wrench with indication function - Google Patents

Abstract

A lockable torque wrench with indication function includes a shaft, a handle, a plurality of rollers, rotary ring, and an engagement member. The shaft is inserted into the handle, and rotatable and stretchable with respect to the handle for adjusting the operation torque of the head portion. The rotary ring is mounted around the metal pipe of the handle from the outer side of the rollers, and able to rotate with respect to the metal pipe and switched between a press position and a release position. When the rollers ascend, the first and second grooves provide an allowance space with a deep section for the rollers to ascend. When the rollers descend, the first and second grooves resists the rollers against the shaft with a shallow section, and the engagement member pressurizes the rollers, so as to generate a stage sensation during the rotation between the handle against the shaft.

Description

Locking type torque wrench with prompt

The present invention relates to a torque wrench, especially a locking type torque wrench with prompts.

As shown in Taiwan Patent No. M515937, it discloses a locking ring structure of a torque wrench. The body is provided with an outer tube outside the inner tube, and the outer tube has two positioning parts and a limiting part, and a lock is provided on the outer tube. The locking ring has an inner locking ring and an outer locking ring. The inner locking ring has an escape groove corresponding to each positioning member, and the inner locking ring has a positioning groove corresponding to the limiting member, and there are two limiting blocks in the positioning groove. When the locking ring rotates relative to the main body, the limiting member can be selectively engaged with any limiting block. In addition, the outer periphery of the inner locking ring is convexly provided with a number locking block and the inner periphery of the outer locking ring is locked to each other with a number locking groove. In this way, the user can adjust the torque by rotating the locking ring in the loose state, allowing the inner tube and the outer tube to rotate relative to each other, and then locking the inner tube and the outer tube by rotating the locking ring after the torque is determined. The operation of the torque wrench.

Although the aforementioned torque wrench can be locked by the locking ring relative to the body, the inner tube and the outer tube can be locked, or can be rotated relative to adjust the torque, but the locking ring needs to have an inner locking ring and an outer locking ring structure. The inner locking ring also includes avoiding grooves, limiting grooves, limiting blocks, and locking blocks, and the outer locking ring must also have a locking groove structure. This shows that the structure of the locking ring is complicated, which will inevitably lead to time-consuming assembly and difficult to reduce The production cost is the main problem to be solved by the present invention.

In order to solve the above-mentioned problems, the present invention provides a locking type torque wrench with prompts. The long rod can be rotated relative to the grip, and the torque value can be adjusted. When adjusting the torque value, it can give a sense of paragraph. After the torque value, the handle and the long rod can be locked.

An embodiment of the present invention provides a prompt-locking torque wrench, which includes: a long rod, a grip, a swivel ring, a plurality of rollers, and a buckle member. The long rod has a top end and a bottom end. The top end of the long rod is provided with an operating head, and the long rod has a plurality of positioning grooves on the outer periphery adjacent to the bottom end. Between the positioning grooves is the rod wall. There is an extended metal tube at one end of the handle. The metal tube is provided with a plurality of oblong holes. The bottom end of the long rod passes through the metal tube and is connected to the handle. It can be rotated and retracted relative to the handle to adjust the driving torque of the operating head. The oblong holes can be respectively aligned with the positioning grooves along with the relative rotation of the handle and the long rod. The swivel has a shaft hole and is sleeved outside the metal tube. The inner circumference of the swivel is provided with a first groove and a second slot on opposite sides. The swivel can rotate relative to the metal tube to be located at a pressing position and a Release position; relative to the swivel ring from the depressing position to the release position, the first groove is shallow at one end and gradually deeper to the other end, and the second groove is an arc-shaped groove formed by the same radius of curvature, and from both ends to the center Shallow but deep, the first groove and the second groove are of opposite depth. Plural rollers are arranged one by one in each oblong hole and correspondingly located in the first groove and the second groove. Each roller can sink when encountering the aforementioned positioning groove with the relative rotation of the handle and the long rod, or encounter two phases. When the rod wall between the adjacent positioning grooves rises, the first groove and the second groove tighten the long rod when the corresponding roller sinks with their shallow places, and let the corresponding rollers roll at their respective deep places. There is room for the column to rise. The retaining members are positioned on both sides of the metal tube and extend along the outer circumference of the metal tube and are normally buckled on a buckling part of the aforementioned roller, and the aforementioned buckled roller is supported by a top supporting buckle member when it is raised The generated pre-force presses against the long rod, and when it encounters the aforementioned positioning groove, it is pressed down by the pre-force and instantly sinks, forming a sense of paragraph when the grip and the long rod rotate relative to each other.

As a result, the handle and the long rod rotate relative to each other to tightly locate the rotating ring of the roller. The inner circumference is provided with a first groove and a second groove, and the second groove is an arc-shaped groove formed by the same radius of curvature. There is a structure from both ends to the center from shallow to deep, and when the first groove is shallower than the corresponding roller sinks and tightens the long rod, the second groove will follow the rotation of the swivel and become shallower. The pair of rollers are tightly pressed on the long rod, so the position and depth of the second groove do not need to be as precise as the first groove, which can ensure that the plural rollers can simultaneously form a tightening effect on the long rod, and the structure of the swivel is simplified. And it can also effectively provide positioning between the handle and the long rod, so as to achieve the effect of rapid assembly and effective reduction of production costs.

In order to facilitate the description of the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, specific embodiments are used to express it. Various objects in the embodiment are drawn according to the proportion, size, deformation amount or displacement amount suitable for explanation, rather than drawn according to the proportion of the actual element, which will be described first.

Please refer to Figures 1 to 8, the present invention provides a prompt locking torque wrench, which includes a long rod 10, a grip 20, two rollers 30, 40, a swivel 50 and a buckle In the preferred implementation, the deduction member is a buckle 60, in which:

The long rod 10 has a top end 11 and a bottom end 12. The long rod 10 is provided with an operating head 13 at the top end 11, and the long rod 10 has a plurality of positioning grooves 14 on the outer periphery adjacent to the bottom end 12, and the plurality of positioning grooves 14 are spaced apart A rod wall 15 is provided between two adjacent positioning grooves 14, and the plurality of positioning grooves 14 are arranged in a ring shape.

The grip 20 has a metal tube 21 at one end thereof. The metal tube 21 is made of aluminum in this embodiment. 10 can rotate relative to the handle 20, and then expand and contract to adjust the driving torque of the operating head 13. In this embodiment, the metal tube 21 is provided with two oblong holes 22. Each oblong hole 22 has an oblong shape as its name suggests. Each oblong hole 22 can be separated from each positioning groove 14 with the relative rotation of the long rod 10 and the handle 20. alignment.

The roller 30 and the roller 40 of this embodiment are arranged one by one in each oblong hole 22 on the opposite sides of the metal tube 21. When the long rod 10 and the grip 20 rotate relative to each other, the oblong holes 22 are positioned When the groove 14, the roller 30 and the roller 40 sink in the positioning groove 14 (as shown in Figure 5), and when the long rod 10 and the grip 20 continue to rotate relative to each other, the roller 30 and the roller 40 It rises when it encounters the pole wall 15 (as shown in Figure 6 to Figure 7).

In this embodiment, the length direction of each oblong hole 22 is the same as the length direction of each positioning groove 14. In addition, in this embodiment, the long rod 10 is provided with a scale value 16 that displays the torque value. When the long rod 10 rotates one circle relative to the grip 20, the telescopic amount of the long rod 10 relative to the grip 20 is a distance of a scale value 16. This displays the torque value after torque adjustment.

The swivel 50 in this embodiment has a shaft hole 51 and is sleeved outside the metal tube 21. The inner circumference of the swivel 50 is provided with a first groove 52 corresponding to the roller 30, and a second groove is provided corresponding to the roller 40 53. The swivel 50 can rotate relative to the metal tube 21 to be positioned at a depressing position (as shown in FIG. 5) and a release position (mainly as shown in FIG. 6). The first groove 52 is shallow and deep along the direction in which the swivel 50 is turned from the detent position to the release position, and the shallow part 521 of the first groove 52 tightens the long rod 10 when the corresponding roller 30 sinks. , And each first groove 52 has a depth 522 for the corresponding roller 30 to have a space to rise. Also along the direction in which the swivel 50 is turned from the depressing position to the releasing position, the second groove 53 is an arc groove formed by the same radius of curvature, and the second groove 53 is shallow from both ends to the center with the same radius of curvature. Deep, the second groove 53 uses a shallow part 531 to tighten the long rod 10 when the corresponding roller 40 sinks, and the second groove 53 uses a deep part 532 in the center to allow the corresponding roller 40 to have a space to rise.

The first groove 52 and the second groove 53 are opposite in depth, which means that as the rotating ring 50 rotates, the first groove 52 and the second groove 53 are both shallow 521, 531 on the corresponding rollers 30, When the roller 40 sinks, the long rod 10 is pressed tightly, and the first groove 52 and the second groove 53 both provide the roller 30 with a space for the roller 30 to rise in the depths 522 and 532. In other words, because the second groove 53 is an arc-shaped groove formed by the same radius of curvature, when the roller 30 moves to a shallow place 521 in the first groove 52 and the long rod 10 is pressed by the roller 30, the roller 40 It will roll along the second groove 53 from the deep part 532 to the shallow part 531 to an appropriate position, so that the roller 40 will simultaneously tighten the long rod 10, so the position and depth of the second groove 53 does not need to be the same as that of the first groove 52 It is precise to ensure that the roller 30 and the roller 40 can simultaneously form a tightening effect on the long rod 10. In addition, because the roller 30 and the roller 40 are respectively provided in the oblong holes 22 on the opposite sides of the metal tube 21, and the roller 30 and the roller 40 are respectively provided in the first groove on the inner circumference of the rotating ring 50. 52 and the second groove 53 (as shown in Figure 4), so the rotating ring 50 on the metal tube 21 will be restricted by the rollers 30 and 40, so that the rotating ring 50 is limited at the position where the metal tube 21 is provided. , Can prevent the swivel 50 from detaching from the metal tube 21.

In this embodiment, the buckle 60 has a positioning portion 61 at two different ends. The buckle 60 is positioned on both sides of the metal pipe 21 by the positioning portions 61, and the buckle 60 is along the outer circumference of the metal pipe 21. When extended, the buckle 60 is normally buckled on a buckling part 31 of the roller 30. When the roller 30 is raised, it is pressed against the long rod 10 by the pre-force generated by a top support buckle 60 (as shown in Figure 8). ), and when it encounters the aforementioned positioning groove 14, it is pressed down by the pre-force and instantly sinks to form a sense of passage when the long rod 10 and the grip 20 are relatively rotated. This sense of passage can be silent or sound, depending on the The pre-force makes the roller 30 collide with the positioning groove 14 when it sinks instantaneously.

In this embodiment, the buckle ring 60 is integrally formed, and each positioning portion 61 is reversely bent at the opposite ends of the buckle ring 60 to form a barbed hook shape. There is a groove 24 on both sides of the metal tube 21 corresponding to each positioning portion 61, and each groove 24 has an abutting surface 241. The abutting surface 241 faces away from the roller 30, and the retaining ring When 60 is normally buckled on the buckling portion 31, each barb-shaped positioning portion 61 is positioned against the abutting surface 241 in the corresponding groove 24. In this embodiment, only one roller 30 is buckled by the buckle 60, but in different embodiments, a plurality of rollers 30 with buckling parts 31 may be provided to buckle the buckle 60 (not shown in the figure).

In this embodiment, the crimping portion 31 is located at one end of the roller 30 and has a groove portion 311. The groove portion 311 is recessed in the shape of a ring on the roller 30. The retaining ring 60 is normally buckled in the groove portion 311 of the roller 30. In addition, in the swivel 50 of this embodiment, the shaft hole 51 has a large-diameter section 511 and a small-diameter section 512. The large-diameter section 511 has a larger diameter than the small-diameter section 512. Each first groove 52 of the swivel 50 is provided in On the inner circumference of the small diameter section 512, the buckle 60 is arched and is located in the large diameter section 511. In addition, the extent of the buckle 60 extending along the outer circumference of the metal pipe 21 is greater than half of the circumference of the metal pipe 21.

In this embodiment, the metal tube 21 is covered with a rubber ring 70 at one end close to the extended grip 20. The swivel 50 contacts the rubber ring 70 when it is sleeved outside the metal tube 21, and the rubber ring 70 is also located at the large The diameter section 511 is adjacent to the buckle 60, and the rubber ring 70 is used to provide frictional resistance when the swivel 50 rotates, so as to prevent the swivel 50 from rotating and loosening when the swivel 50 is accidentally toggled.

When adjusting the torque value of the torque wrench of the above-mentioned embodiment, the operator can rotate the swivel 50 to be in the aforementioned release position, and hold the long rod 10 and the grip 20 with both hands respectively and make the two rotate relative to each other. The end edge of the metal tube 21 of the handle 20 is aligned with the scale value 16 on the long rod 10, and then the swivel 50 is rotated to be in the aforementioned pressing position, and the torque adjustment of the torque wrench can be completed. When the torque wrench is in the process of adjusting the torque, the roller 30 and the roller 40 meet the positioning groove 14 in the oblong hole 22 and sink. The post 40 will rise from the positioning groove 14 where it is located (as shown in Figures 6 to 7), and the roller 30 will press against the long pole 10 due to the pre-force generated by the top support buckle 60, and continue with the grip 20 When the roller 30 encounters the next positioning groove 14 by rotating relative to the long rod 10, the roller 30 will be pressed down by the aforementioned pre-force and instantly sink to the positioning groove 14 (as shown in FIG. 8), thereby forming The sense of passage when the long rod 10 and the grip 20 are relatively rotated serves as a reminder.

From the above description, it is not difficult to find that the characteristics of the present invention are:

1. The prompt locking torque wrench of this creation, the long rod 10 and the handle 20 are relatively rotated to tightly locate the rollers 30, 40 of the swivel 50, and the first groove 52 and the The second groove 53, where the second groove 53 is an arc groove formed by the same radius of curvature, so it has a shallow and deep structure from both ends to the center. When the first groove 52 is shallow 521 under the corresponding roller 30 When sinking and tightening the long rod 10, the second groove 53 will follow the rotation of the swivel 50 and use the shallow 531 to tighten the roller 40 on the long rod 10, so the position and depth of the second groove 53 are different. It needs to be precise like the first groove 52 to ensure that both the rollers 30 and 40 can simultaneously form a tightening effect on the long rod 10. For this reason, compared with the problem of complex structure of the lock ring structure of the conventional torque wrench, the present invention has a simplified structure of the swivel 50 and can also effectively provide positioning between the long rod 10 and the grip 20, so it can It has the effect of fast assembly and effective reduction of production cost.

2. During the relative rotation of the long rod 10 and the handle 20, when the roller 30 rises from the positioning groove 14, the pre-force generated by the top support buckle (buckle 60) is pressed against the long rod 10 , And when it encounters the positioning groove 14 again, it is pressed down by the aforementioned pre-force and instantly sinks to the positioning groove 14, thus forming a sense of paragraph when the long rod 10 and the grip 20 are relatively rotated, even if the scale on the torque wrench is worn out In the case of ambiguity, the operator can still use the sense of the paragraph as a reminder to know that the torque value is indeed at the desired adjustment, so as to achieve the effect of accurately adjusting the torque value.

The above-mentioned embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. All modifications or changes made without violating the spirit of the present invention fall within the scope of the present invention's intended protection.

10: Long pole 11: top 12: bottom 13: Operation head 14: positioning slot 15: pole wall 16: scale value 20: Grip 21: Metal tube 22: Long round hole 24: Groove 241: Leaning Face 30: roller 31: Withholding part 311: ditch 40: roller 50: swivel 51: Shaft hole 511: Large diameter section 512: Trail section 52: first slot 521: Shallow 522: deep 53: second slot 531: Shallow 532: deep 60: Buckle 61: Positioning Department 70: Rubber ring

Fig. 1 is a perspective view of a locking torque wrench with prompts according to an embodiment of the present invention. Fig. 2 is a three-dimensional exploded view of a prompt locking torque wrench according to an embodiment of the present invention. Fig. 3 is a three-dimensional partial cross-sectional view of a prompt locking torque wrench according to an embodiment of the present invention. Fig. 4 is a plan sectional view of the grip portion of the locking torque wrench with prompts according to the embodiment of the present invention. Fig. 5 is a schematic cross-sectional view of the assembly of the long rod, the metal tube and the swivel according to the embodiment of the present invention, in which the swivel rotates to the depressing position. Fig. 6 is a schematic diagram of Fig. 5 when the swivel is rotated to the release position, and the metal tube is rotated relative to the long rod, so that the two rollers can be raised in the positioning groove. Fig. 7 is a schematic diagram of the metal tube in Fig. 6 continuing to rotate relative to the long rod, and the roller buckled by the buckle is supported on the wall of the long rod. Fig. 8 is a schematic diagram showing the metal tube in Fig. 7 continues to rotate relative to the long rod, and the roller buckled by the buckle meets the positioning groove and sinks instantaneously.

10: Long pole

12: bottom

14: positioning slot

15: pole wall

16: scale value

20: Grip

21: Metal tube

22: Long round hole

24: Groove

30: roller

31: Withholding part

311: ditch

40: roller

50: swivel

51: Shaft hole

511: Large diameter section

512: Trail section

52: first slot

521: Shallow

522: deep

53: second slot

531: Shallow

532: deep

60: Buckle

61: Positioning Department

70: Rubber ring

Claims (7)

A locking type torque wrench with prompt, comprising: a long rod with a top end and a bottom end, the long rod is provided with an operating head at the top end, and the long rod has a plurality of positioning grooves on the outer periphery adjacent to the bottom end , The plurality of positioning grooves are arranged in a ring at a certain interval, and the long rod is a rod wall between two adjacent positioning grooves; a handle with an extended metal tube at one end, and a plurality of oblong holes are provided in the metal tube , The long rod passes through the metal tube with the bottom end to access the handle, and can rotate relative to the handle to expand and contract to adjust the driving torque of the operating head. Each of the long round holes can follow the handle and the handle. The relative rotation of the long rods are respectively aligned with the positioning grooves; a swivel ring, which has a shaft hole and sleeves outside the metal tube, the inner circumference of the swivel ring is provided with a first groove and a second groove located opposite On both sides, the swivel can rotate relative to the metal tube to be positioned at a depressing position and a releasing position; in a direction relative to the swivel from the depressing position to the releasing position, the first groove is shallow at one end Going deeper to the other end, the second groove is an arc-shaped groove formed by the same radius of curvature, from both ends to the center from shallow to deep, the first groove and the second groove are opposite in depth; plural rollers, one to one Set in each of the oblong holes and correspondingly located in the first groove and the second groove, each of the rollers can sink when encountering the aforementioned positioning groove with the relative rotation of the grip and the long rod, or encounter two phases When the wall of the rod between the adjacent positioning grooves rises, the first groove and the second groove tighten the long rod with their respective shallow places when the corresponding roller sinks, and respectively let the long rods with their respective deep places. The corresponding roller has a space to rise; and a buckle member, which is positioned on both sides of the metal pipe and extends along the outer circumference of the metal pipe and is normally buckled on a buckling portion of the roller. The rolling roller is pressed against the long rod by a pre-force generated by the supporting member when it is raised, and when it encounters the aforementioned positioning groove, it is pressed down by the pre-force and immediately sinks, forming the grip and The sense of paragraph when the long rod is relatively rotated. The prompt locking torque wrench according to claim 1, wherein the metal tube is sheathed with a rubber ring on one end of the grip close to its extension, and the swivel is in contact with the metal tube when it is sheathed outside the metal tube The rubber ring is used to generate frictional resistance against rotation of the rotating ring. The prompt locking torque wrench according to claim 2, wherein the shaft hole has a small diameter section, and a large diameter section with a larger diameter than the small diameter section, the first groove and the second groove are provided On the inner circumference of the small diameter section, the retaining member is located on the large diameter section and is arched, and the rubber ring is also located on the large diameter section and is adjacent to the retaining member. According to claim 3, the locking type torque wrench with prompt, wherein the buckle member has a positioning portion at two different ends, and the buckle member is positioned on the metal tube by the two positioning portions. The two sides extend along the outer circumference of the metal tube. The prompt locking torque wrench according to claim 4, wherein the buckle member is a buckle ring, and the aforementioned two positioning positions are at different ends of the buckle ring and are integrally formed with the buckle ring, each The positioning part is that the buckle is reversely bent at the different two ends to form an undercut shape. According to claim 5, the locking type torque wrench with prompt, wherein a groove on both sides of the metal tube corresponds to each positioning portion, and each groove has an abutting surface, and each of the The facing surface is opposite to the roller fastened by the buckle ring. When the buckle ring is normally buckled on the buckling part, each of the barbed positioning parts abuts against the corresponding groove The inner abutting surface is positioned, and the extent of the buckle ring extending along the outer circumference of the metal tube is greater than half of the circumference of the metal tube. According to claim 3, the lock-type torque wrench with prompt, wherein the crimping portion is located at one end of the roller where it is located, the crimping portion has a groove portion, and the groove portion is recessed in a ring shape on the roller where it is located, The buckling member normally buckles the buckled roller in the groove.

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