TWI783787B - torque wrench - Google Patents

Abstract

A torque wrench comprises a pipe body with a pipe hole connecting both ends, and a driving head and a torque adjustment group are respectively arranged at the two ends of the pipe body; the driving head includes a head and a post connected to each other, and the post extends into the pipe hole Inside; a linkage rod is set in the tube hole and its two ends are respectively connected to the connecting rod and the torque adjustment group. A ball placed in the radial groove, the ball part protrudes from the notch of the radial groove and leans against the inner hole wall of the pipe hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to move in the pipe hole, The balls in the radial groove roll against the inner wall of the tube hole, effectively avoiding the operation resistance and structural wear caused by sliding friction during the torque adjustment operation, and improving the stability and smoothness of use.

Description

torque wrench

The invention relates to the technical field of hand tools, in particular to a torque wrench.

In general industry, when performing locking operations, since everyone feels differently about the magnitude of the force, and some special combinations are not as tight as possible, a torque wrench with a settable torque value is used to avoid locking. Problems such as damage to the locked object or damage to the screw teeth of the locking piece occur when the firmware is locked too tightly.

For example, the invention patent of "torque wrench structure" in the announcement No. I647075, the main creation purpose of this conventional patent, as stated in paragraph 0006 of its description, is to reduce the jacking by setting the kit between the outer tube and the jacking piece The contact area between the part and the outer tube reduces the friction between each other, and when the torque wrench is operated, the sliding effect of the top holding part is smoother, and the torque transmission performance of the torque wrench structure of the present invention is improved.

However, the contact portion of the sleeve in the above-mentioned known patent is a densely wound helical radial structure. Therefore, when the sleeve slides in the accommodating space of the outer tube and slides along the axial direction of the outer tube, the plural contacts of the sleeve The part will still form a densely wound helical line contact friction with the inner wall of the outer tube, which will reduce the torque transmission performance of the torque wrench structure.

In particular, when the lubricating oil added between the outer tube and the sleeve gradually loses and decreases with long-term use and frequent operations, resulting in a gradual decrease in the lubricating effect, the torque transmission effect will be significantly reduced due to friction, and will further cause Irregular use and structural wear.

Therefore, how to improve the shortcomings of the conventional torque wrench due to the shortcomings of sliding friction and structural wear and tear is the problem to be solved for this creation.

The main purpose of the present invention is to effectively avoid the operation resistance and structural wear caused by sliding friction during the torque adjustment operation through the rolling group installed in the wrench, and further improve the stability and smoothness of use.

In order to achieve the above purpose and effect, a torque wrench of the present invention comprises:

A pipe body has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at the two ends of the pipe body.

The driving head includes a head and a connecting rod connected to each other, and the connecting rod extends into the tube hole.

A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has at least one radial slot recessed on the outer peripheral surface, and the at least one radial slot Set a rolling group separately.

The rolling group includes a ball, which is accommodated in the radial groove, so that the ball protrudes from the notch of the radial groove and leans against the inner hole wall of the pipe hole.

The torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, so that the ball in at least one radial groove rolls relative to the inner wall of the tube hole.

A second embodiment of a torque wrench of the present invention includes:

A pipe body, which has a pipe hole connecting the two ends, and the two ends of the pipe body are respectively equipped with a driving head and a torque adjustment group;

The drive head includes a head and a connecting rod connected to each other, and the connecting rod extends into the tube hole;

A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has a plurality of radial holes arranged at intervals, and the plurality of radial holes penetrates the linkage rod in the radial direction, And the plurality of radial holes are respectively set into a rolling group;

The rolling group includes a coil spring and two balls respectively, the two balls are located at the openings at both ends of one of the radial holes, the coil spring is located between the two balls and bounces against the two balls with both ends, so that the two The ball elastically leans against the inner hole wall of the pipe hole;

The torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, and the two balls at both ends of the radial holes roll relative to the inner wall of the tube hole.

Please refer to Figures 1 to 8. A torque wrench of the present invention includes two embodiments. The first embodiment is shown in Figures 1 to 3. The torque wrench 100 includes:

A pipe body 10, which has a pipe hole 11 connected to both ends, and a driving head 20 and a torque adjustment group 50 are respectively arranged at both ends of the pipe body 10;

The driving head 20 includes a head 21 and a connecting rod 22 connected to each other, and the connecting rod 22 extends into the pipe hole 11;

A linkage rod 30, which is arranged in the pipe hole 11 and connected to the connecting rod 22 and the torque adjustment group 50 at both ends, the linkage rod 30 has at least one radial groove 32 recessed on the outer peripheral surface, and the At least one radial groove 32 is respectively set with a rolling group 40;

The rolling group 40 includes a ball 42, the ball 42 is accommodated in the radial groove 32, so that the ball 42 partially protrudes from the notch of the radial groove 32 and abuts against the inner hole of the pipe hole 11 wall;

The torque adjusting operation of the torque adjusting group 50 drives the linkage rod 30 to displace in the tube hole 11 , so that the ball 42 in at least one radial groove 32 rolls relative to the inner wall of the tube hole 11 .

The foregoing is the main technical feature of the main embodiment of the present invention, which corresponds to the content of the first item of the scope of the patent application of this case, so that the purpose and implementation type of the present invention can be known in detail, and the technical features described in the scope of the remaining subsidiary applications are for the purpose of The detailed description or additional technical features of the first item of the patent application scope are not used to limit the scope of the first item of the patent application scope. It should be known that the first item of the patent application scope in this case does not necessarily include the description of the other subsidiary application patent scopes technical characteristics.

Continuing the above content, the embodiment, use effect and function of the present invention are further described in detail. Since the present invention penetrates radially through the plurality of radial grooves 32 of the linkage rod 30, a ball 42 is set respectively, and the ball 42 partially protrudes from the The radial groove 32 abuts against the inner hole wall of the tube hole 11 .

Therefore, when the torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to move in the tube hole 11 , the balls 42 in the radial grooves 32 push against the inner wall of the tube hole 11 to roll. Therefore, the operation resistance and structural wear caused by sliding friction during the torque adjustment operation can be effectively avoided, and the stability and smoothness of use can be further improved.

Moreover, when lubricating oil is added between the pipe hole 11 and the connecting rod 30, the radial groove 32 provided on the connecting rod 30 can contain the lubricating oil to provide the ball 42 against the inner wall of the pipe hole 11. Rolling continuous lubrication.

The characteristics of each element of the present invention are further described in detail below. In the above-mentioned first to third figures, the rolling group 40 further includes a coil spring 41 located in the radial groove 32, and the ball 42 is supported by the coil spring 41. Pushing and elastically resisting the inner hole wall of the pipe hole 11 . Moreover, the at least one radial groove 32 has a tapered mouth 321 extending outwards; therefore, the assembly of the coil spring 41 and the ball 42 is provided by the outwardly expanding structure of the tapered mouth 321. and, when lubricating oil is added between the pipe hole 11 and the connecting rod 30, the internal space between the tapered mouth 321 and the ball 42 can provide the lubricating oil to keep the rolling of the ball 42 and improve The smoothness of torque adjustment operation.

In addition, the structure of the second embodiment of the present invention is shown in Figures 4 to 8, and the torque wrench 100 includes:

A pipe body 10 has a pipe hole 11 connecting two ends, and a driving head 20 and a torque adjustment group 50 are respectively assembled at both ends of the pipe body 10 .

The driving head 20 includes a head 21 and a connecting rod 22 connected to each other, and the connecting rod 22 extends into the pipe hole 11;

A linkage rod 30, which is arranged in the pipe hole 11 and its two ends are respectively connected to the connecting rod 22 and the torque adjustment group 50, the linkage rod 30 has a plurality of radial holes 31 arranged at intervals, and the plurality of radial holes 31 are arranged along the The linkage rod 30 runs through the linkage rod 30 radially, and the plurality of radial holes 31 are respectively set with a rolling group 40;

The rolling group 40 includes a helical spring 41 and two balls 42. The two balls 42 are located at the open positions at both ends of one of the radial holes 31. The helical spring 41 is located between the two balls 42 and bounces against the two ends. Two balls 42, so that the two balls 42 elastically lean against the inner wall of the pipe hole 11;

The torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to displace in the tube hole 11 , and the two balls 42 at two ends of each radial hole 31 roll relative to the inner wall of the tube hole 11 .

In the above-mentioned second embodiment, a helical spring 41 and two balls 42 are respectively set in the plurality of radial holes 31 radially penetrating through the linkage rod 30 , and the helical spring 41 bounces against the balls 42 with both ends between the two balls 42 , so that the ball 42 elastically leans against the inner hole wall of the pipe hole 11 . When the torque adjustment operation of the torque adjustment group 50 drives the linkage rod 30 to move in the pipe hole 11, the two balls 42 at both ends of each radial hole 31 are elastically pressed against the inner hole wall of the pipe hole 11 for rolling. . Therefore, the operation resistance and structural wear caused by sliding friction during the torque adjustment operation can be effectively avoided, and the stability and smoothness of use can be further improved.

The features of each component of the second embodiment will be further described below, wherein the plurality of radial holes 31 respectively have a tapered mouth 311 extending outwardly at both ends. Moreover, as shown in the sixth and seventh figures, the plurality of radial holes 31 are preferably two radial holes 31, and the two radial holes 31 are located near the two ends of the linkage rod 30, and the two radial holes 31 The distance d to the two ends of the linkage rod 30 is not less than the diameter D of the radial hole 31; therefore, by the radial hole 31 close to the two ends of the linkage rod 30, the rolling group 40 of the set in the hole can be moved in this linkage. The two ends of the rod 30 form a stable support for rolling, and the distance d from the radial hole 31 to the two ends of the linkage rod 30 is not less than the diameter D of the radial hole 31, so that the structural strength of the radial hole 31 to the two ends of the linkage rod 30 impact can be minimized.

Secondly, as shown in the eighth figure, the two radial holes 31 are not in the same direction, and the angle θ of the two holes between the two radial holes 31 is preferably 90 degrees; The rolling of the two balls 42 at the two ends of each radial hole 31 of the linkage rod 30 relative to the inner wall of the tube hole 11 can form a better operation balance, so as to improve the smoothness of the torque adjustment operation.

Furthermore, the torque adjustment group 50 includes a rotating sleeve 51 and an elastic member 52 and a pressing member 53 slidingly assembled in the pipe hole 11, and the elastic member 52 is located between the linkage rod 30 and the pressing member 53 .

In addition, the elastic member 52 is a helically wound compression spring, and the two ends of the elastic member 52 bounce against the linkage rod 30 and the pressing member 53; The screw between the sleeve 51 and the pressing member 53 moves forward and backward, so that the pressing member 53 is driven to compress the elastic member 52, and the torque value can be adjusted by changing the compression degree of the compressed elastic member 52.

As mentioned above, the present invention can truly avoid the operational friction and derivative defects of the current conventional torque wrench by means of the rolling group arranged in the pipe body 10, and achieve the following advantages:

1. Effectively avoid operating resistance and structural wear caused by sliding friction during torque adjustment operation.

2. Further improve the stability and smoothness of the torque wrench in operation.

100: Torque wrench

10: tube body

11: tube hole

20: drive head

21: head

22: post

30: linkage rod

31: radial hole

311, 321: tapered mouth

32: radial volume

40:Rolling group

41: coil spring

42: Ball

50:Torque adjustment group

51: turn sleeve

52: Elastic parts

53: Compression piece

The first figure is a three-dimensional assembly diagram of the first embodiment of the present invention. The second figure is a three-dimensional exploded view of the first embodiment of the present invention. Figure 3 is a schematic cross-sectional view of line III-III in Figure 1. Figure 4 is a three-dimensional assembly diagram of the second embodiment of the present invention. The fifth figure is a three-dimensional exploded view of the second embodiment of the present invention. Figure 6 is a schematic cross-sectional view of line VI-VI in Figure 4 . The seventh figure is a partially enlarged cross-sectional schematic diagram of the sixth figure. Figure 8 is a schematic cross-sectional view of line VIII-VIII in Figure 4.

100: Torque wrench

10: tube body

20: drive head

50:Torque adjustment group

51: turn sleeve

Claims (8)

A torque wrench, comprising: a pipe body, which has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at both ends of the pipe body; the driving head includes a head and a connecting rod connected to each other , and the connecting rod extends into the pipe hole; a linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has at least one recessed on the outer peripheral surface radial grooves, and the at least one radial groove is respectively set with a rolling group; the rolling group includes a ball, and the ball is accommodated in the radial groove so that the ball protrudes from the radial groove The notch of the groove is against the inner hole wall of the tube hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, so that the ball in at least one radial groove is opposite to the inner wall of the tube hole Rolling; the at least one radial groove respectively has a tapered mouth extending outward. The torque wrench according to claim 1, wherein the rolling group further includes a helical spring located in the radial groove, and the ball is pushed by the helical spring to elastically resist the inner hole wall of the tube hole. A torque wrench, comprising: a pipe body, which has a pipe hole connecting two ends, and a driving head and a torque adjustment group are respectively arranged at both ends of the pipe body; the driving head includes a head and a connecting rod connected to each other , and the connecting rod extends into the pipe hole; A linkage rod, which is arranged in the pipe hole and connected to the connecting rod and the torque adjustment group at both ends, the linkage rod has a plurality of radial holes arranged at intervals, and the plurality of radial holes penetrates the linkage rod in the radial direction, And the plurality of radial holes are respectively set with a rolling group; the rolling group respectively includes a coil spring and two balls, the two balls are located at the openings at both ends of one of the radial holes, and the coil spring is located between the two balls And the two ends bounce against the two balls, so that the two balls elastically lean against the inner hole wall of the tube hole; the torque adjustment operation of the torque adjustment group drives the linkage rod to displace in the tube hole, and the two ends of each radial hole The two balls roll relative to the inner wall of the pipe hole. The torque wrench as described in Claim 3, wherein the plurality of radial holes each have a tapered opening at both ends extending outward. The torque wrench as described in claim 3, wherein the plurality of radial holes are preferably two radial holes, and the two radial holes are located near the two ends of the linkage rod, and the two radial holes reach the two ends of the linkage rod The distance between the ends is not less than the diameter of the radial hole. The torque wrench as described in Claim 5, wherein the two radial holes are not in the same direction, and the angle θ between the two radial holes is preferably 90 degrees. The torque wrench as described in claim 3, wherein the torque adjustment group includes a rotating sleeve and a sliding assembly, an elastic member and a pressing member in the pipe hole, and the elastic member is located between the linkage rod and the pressing member . The torque wrench according to claim 7, wherein the elastic member is a helically wound compression spring, and both ends of the elastic member bounce against the linkage rod and the pressing member.

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