TWI666095B - Torque wrench with support structure - Google Patents

Abstract

The present invention provides a support type torque wrench, which includes: a main rod body, an adjustment tube, a torque adjustment assembly, a transmission rod, a force transmission device and a support member. A driving portion and a driving portion are provided at one end of the main rod body. An accommodation space is provided therein; one end of the adjustment tube is sleeved on the main rod body; a torque adjustment component is provided between the accommodation space and the interior of the adjustment tube. The torque adjustment component has an elastic member and a pushing member, and one end of the elastic member Abutting the pushing member; one end of the transmitting rod is connected with the driving part; wherein the force transmitting device is arranged in the accommodating space and connected between the transmitting rod and the pushing member; the supporting member is provided on the outer periphery of the transmitting device and supports The components are in contact with the inner peripheral edge of the main rod body; thereby, the support is used to prevent the force transmission device from being affected by the flexural stress to ensure the torque performance of the torque wrench.

Description

Support type torque wrench

The present invention relates to a torque wrench, and more particularly to a torque wrench capable of preventing bending stress from affecting the torque performance.

At present, in the field of large precision machinery such as airplanes, ships and automated machinery, torque wrenches must be used for maintenance or assembly production. The size and torque of the aforementioned large machinery tools are so large that there are as long as It is a large torque wrench from 1 meter to 2 meters.

Please refer to FIG. 1 and FIG. 2, which are partial cross-sectional schematic diagrams of a large torque wrench, including: a main rod body 1 having a driving head 2 at one end thereof, and the other end of the main rod body 1 being connected with a grip 3, Among them, a connecting rod 4 and a holding member 5 are provided inside the main rod body 1, and the connecting rod 4 is connected between the driving head 2 and the holding member 5; and a torque adjusting mechanism 6 provided on the main rod body 1. And the grip 3, the torque adjusting mechanism 6 has a spring 7 and a push rod 8, and the push rod 8 is connected between the holding member 5 and the spring 7; among them, the adjusting spring 7 is abutted against the push rod 8 by rotating the grip 3 The elastic force makes the push rod 8 move axially relative to the main rod body 1, and the push rod 8 will push against the pusher 5 and the connecting rod 4 at the same time to achieve the adjustment of the torque value setting of the torque wrench. Then, The user can hold the grip 3 and pull the main lever body 1 to perform locking operation by driving the head 2.

Furthermore, the length of the main rod body 1 accounts for more than one-half of the overall length of the large torque wrench, and through the long distance between the grip 3 of the application point and the driving head 2 of the fulcrum, a large torque is generated by the principle of torque; However, during the locking operation of the main lever body 1, the main lever body 1 will be deflected due to the influence of the external force of the trigger. The deflection position of the main lever body 1 mostly corresponds to the holding member 5. The deflection stress on the rod body 1 will directly act on the holding member 5, so the holding member 5 will also be affected by the stress, which will affect the torque performance of the large torque wrench; therefore, the large torque wrench will be used for a long period of time. Causes inaccurate torque.

In addition, when the main rod body 1 is subjected to a flexural stress, the inner peripheral edge of the main rod body 1 will be in direct contact with the holding member 5, and the inner peripheral edge of the main rod body 1 will be continuously contacted with the locking process. The supporting member 5 is rubbed. In this way, the inner peripheral edge of the main rod body 1 and the wearing member 5 are damaged, and the torque performance of the large torque wrench is also affected.

In order to solve the above-mentioned problem, the present invention provides a support type torque wrench, which prevents the force transmission device from being affected by the bending stress through the support member, and is beneficial to maintaining the torque performance.

An embodiment of the present invention provides a support type torque wrench, comprising: a main rod body having a driving end and a mounting end, the driving end is provided with a driving portion, the driving portion is used to receive the work piece, the main rod An accommodation space is provided in the body; an adjustment tube having one end sleeved on the installation end; and a torque adjustment component provided between the accommodation space of the main rod body and the inside of the adjustment tube. The torque adjustment component has an elastic member And a pushing member, one end of the elastic member abuts the pushing member; a transmitting rod whose one end is connected with the driving part; a force transmitting device which is arranged in the accommodation space and is connected to the transmitting rod and the pushing member A support member is provided on the outer periphery of the force transmission device, and the support member is in contact with the inner periphery of the main rod body.

Based on the above, the present invention sets a support member on the force transmission device, and prevents the force transmission device from being directly affected by the stress of the main rod body by contacting the support member with the inner peripheral edge of the main rod body. The internal components of the rod are affected by the stress, which causes the internal components to be damaged, which causes the problem that the torque performance is affected.

In one of the embodiments, the force transmission device has a connecting member and a connecting rod, the connecting member is connected between the pushing member and the connecting rod, the connecting rod is connected between the connecting rod and the driving portion, and the supporting member is divided into a first A support member and a second support member, a first support member is provided on the outer periphery of the connecting member, and a second support member is provided on the outer periphery of the connecting rod; thereby, when the main rod body is subjected to flexural stress during the locking operation, The first support member and the second support member abut against the inner peripheral edge of the main rod body, so the stress on the main rod body can be dispersed to both sides to reduce stress concentration, thereby improving the torque performance and the service life of the torque wrench.

In one embodiment, a receiving groove is recessed on the outer edge ring of the first support member, and the receiving groove provides a resistance element arrangement, and the resistance element is in contact with the inner peripheral edge of the main rod body; thereby, the first support is increased. The friction between the component and the main rod body can effectively prevent the coupling component from sliding under the influence of external forces, thereby improving the stability of the coupling component.

In order to facilitate the description of the central idea of the present invention in the above-mentioned summary of content, specific embodiments are described below. Various objects in the embodiments are depicted in proportions, sizes, deformations, or displacements suitable for illustration, rather than in proportion to actual elements, which will be described together.

Please refer to FIG. 3 to FIG. 7, the present invention provides a support type torque wrench 100, wherein FIGS. 3 to 6 are schematic diagrams of a first embodiment of the present invention, and FIG. 7 is a schematic diagram of a second embodiment of the present invention.

Supported Torque Wrench 100 includes:

A main rod body 10 is provided with an accommodating space 11 therethrough in the axial direction; the two ends of the main rod body 10 have a driving end 12 and a mounting end 13 respectively, and the driving end 12 is provided with a driving part 14 and a driving part. 14 is used to receive a work piece for locking operation; in the embodiment of the present invention, the driving portion 14 is a ratchet sleeve joint type.

An adjusting tube 20 is sleeved at one end on the installation end 13. Among them, an adjusting device 30 is provided between the adjusting tube 20 and the main rod body 10. The adjusting device 30 can rotate in the locking position and the release position to control the adjusting tube. Whether 20 can rotate relative to the main rod body 10; when the adjustment device 30 is in the locked position, the adjustment tube 20 cannot rotate relative to the main rod body 10; when the adjustment device 30 is in the release position, the adjustment tube 20 can rotate relative to the main rod body 10.

A torsion adjustment assembly 40 is provided between the accommodation space 11 of the main rod body 10 and the inside of the adjustment tube 20. The torsion adjustment assembly 40 has an elastic member 41, a pushing member 42, and an adjustment structure 43. The elastic member Both ends of 41 are in contact with the pushing member 42 and the adjustment structure 43. The adjustment structure 43 is connected to the adjustment tube 20. When the adjustment device 30 is in the release position, the adjustment tube 20 can rotate relative to the main rod body 10, and the adjustment tube 20 At the same time, the adjusting structure 43 will push against the elastic member 41, so that the pushing member 42 moves along the axial direction of the main rod body 10. By adjusting the elastic force of the elastic member 41 acting on the pushing member 42, the torque adjusting component 40 is adjusted. The pre-force acting on the driving portion 14 reaches the torque value of the torque wrench 100 for adjustment.

One end of the transmission rod 50 is connected to the driving portion 14, and the other end of the transmission rod 50 is recessed with an action groove 51 in the axial direction.

A force transmitting device 60 is disposed in the accommodating space 11 and is connected between the transmitting rod 50 and the pushing member 42. The force transmission device 60 includes a connecting member 61 and a connecting rod 62. The connecting member 61 is connected between the pushing member 42 and the connecting rod 62, and the connecting rod 50 is connected between the connecting rod 62 and the driving portion 14. The connecting rod 62 has a first end portion 621 and a second end portion 622 opposite to each other, and a middle section portion 623 connected between the first end portion 621 and the second end portion 622. The first end portion 621 is connected to the transmission portion. The rod 50 is connected, and the second end portion 622 is connected to the connecting member 61. The outer diameter of the first end portion 621 is smaller than the outer diameter of the middle section 623, and the outer diameter of the middle section 623 is smaller than the outer diameter of the second end 622.

In addition, the first end portion 621 and the action groove 51 of the transmission rod 50 are fixedly connected to each other by a first positioning member 63, and the first positioning member 63 is disposed along an axial direction perpendicular to the main rod body 10 by The first positioning member 63 increases the connection strength between the first end portion 621 and the connecting rod 50. In the first and second embodiments of the present invention, the first positioning member 63 is a positioning pin.

A support member 70 is disposed along the axial direction of the main rod body 10 on the outer peripheral edge of the force transmission device 60. The support member 70 is in contact with the inner peripheral edge of the main rod body 10. The supporting member 70 can be provided with a supporting member 70 on the outer periphery of the connecting member 61 and the connecting rod 62 or a supporting member 70 on the outer periphery of the connecting member 61 and the connecting rod 62. In the first embodiment of the present invention, The support member 70 is divided into a first support member 70a and a second support member 70b, a first support member 70a is sleeved on the outer periphery of the connecting member 61, and a second support member 70b is sleeved on the outer periphery of the middle section 623 of the connecting rod 62; In the second embodiment of the present invention, a supporting member 70 is provided on the outer periphery of the connecting member 61 and the connecting rod 62. In other embodiments of the present invention, the supporting member 70 can also be provided only on the connecting member 61 or the connecting rod 62. Outer periphery.

Furthermore, the support member 70 can be a closed or non-closed structure. In the first and second embodiments of the present invention, the support member 70 is a closed cylindrical structure, and the support member 70 is sleeved on the force transmission device 60. Outer periphery.

In the first embodiment of the present invention, the second support member 70b is sleeved on the outer periphery of the middle section 623, and the second support member 70b and the middle section 623 are fixedly connected to each other by a second positioning member 80, and the second positioning The member 80 is disposed along the axis perpendicular to the main rod body 10, and the strength of the connection between the middle section 623 and the second support member 70b is increased by the second positioning member 80. In the first and second embodiments of the present invention, the second The positioning member 80 is a positioning pin.

In the first embodiment of the present invention, an accommodating groove 71 is recessed on the outer edge ring of the first support member 70a. The accommodating groove 71 is provided with a resistance element 90, and the resistance element 90 is in contact with the inner periphery of the main rod body 10, The resistance element 90 may be an O-ring or a C-shaped buckle. The resistance element 90 is used to increase the frictional resistance between the first support 70a and the main rod body 10. In this embodiment, the number of the receiving grooves 71 is two. The two accommodating grooves 71 are spaced apart, and each accommodating groove 71 is provided with two resistance elements 90.

Furthermore, the inner periphery of the second support member 70b is stepped. The second support member 70b has a first inner diameter 72 and a second inner diameter 73. The first inner diameter 72 is smaller than the second inner diameter 73. The diameter 72 is near the first end portion 621, and the second inner diameter 73 is near the second end portion 622.

Please refer to FIG. 4 to FIG. 6. When the torque wrench 100 performs the locking operation, the main lever body 10 is pulled according to the locking direction, and the main lever body 10 is deflected due to the external force. At this time, The first support member 70a and the second support member 70b will support the main rod body 10, and the stress received by the main rod body 10 will be dispersed by the first support member 70a and the second support member 70b, reducing stress concentration, and avoiding direct stress. Transmission to the force transmission device 60; thereby, the force transmission device 60 can be effectively prevented from being affected by the bending stress of the main rod body 10, which is beneficial to maintaining the torque performance.

Moreover, during the locking operation of the main lever body 10, when the torque wrench 100 is used with a torque greater than a set torque value (that is, greater than the elastic force of the elastic member 41), the engaging member 61 will trip and emit Vibrations and sounds provide a warning to users and remind them to stop working.

Furthermore, during the locking operation of the main lever body 10, the connecting rod 62 will bend as the main lever body 10 is pulled. At this time, the second inner diameter 73 of the second support 70b cooperates with the middle section 623. The outer diameter can provide a suitable bending movement space of the connecting rod 62; thereby, the pre-force of the torque adjusting assembly 40 can be stably transmitted to the driving portion 14 to maintain the torque performance.

In addition, during the locking operation to pull the main lever body 10, it is necessary to prevent the engaging member 61 from sliding under the influence of the external force, so that the pre-force provided by the torque adjusting assembly 40 can be accurately and stably transmitted through the connecting rod 62 and the transmitting rod 50. To the driving portion 14; therefore, the resistance element 90 can effectively increase the frictional resistance between the first support member 70 a and the main rod body 10, thereby improving the stability of the engaging member 61.

The above-mentioned embodiments are only used to illustrate the present invention, and are not intended to limit the scope of the present invention. Various modifications or changes which do not violate the spirit of the present invention belong to the scope of the present invention.

＜ Learning ＞

1‧‧‧ main shaft

5‧‧‧ Top Holder

2‧‧‧Drive the head

6‧‧‧Torque adjustment mechanism

3‧‧‧ Grip

7‧‧‧spring

4‧‧‧ connecting rod

8‧‧‧Put

<Invention>

100‧‧‧ torque wrench

61‧‧‧Joint piece

10‧‧‧ main shaft

62‧‧‧ connecting rod

11‧‧‧ accommodation space

621‧‧‧first end

12‧‧‧Driver

622‧‧‧ second end

13‧‧‧installation end

623‧‧‧Mid section

14‧‧‧Driver

63‧‧‧First positioning piece

20‧‧‧ adjusting tube

70‧‧‧ support

30‧‧‧ adjusting device

70a‧‧‧first support

40‧‧‧Torque adjustment kit

70b‧‧‧Second support

41‧‧‧elastic

71‧‧‧Receiving slot

42‧‧‧ Pusher

72‧‧‧first inner diameter

43‧‧‧ adjust structure

73‧‧‧Second inner diameter

50‧‧‧ Passing Post

80‧‧‧Second positioning

51‧‧‧Action slot

90‧‧‧ resistance element

60‧‧‧Power Transmission Device

FIG. 1 is a schematic partial cross-sectional view of a conventional large torque wrench. Figure 2 is a schematic diagram of a conventional large torque wrench affected by flexural stress. FIG. 3 is a schematic diagram of the three-dimensional appearance of the present invention. FIG. 4 is a schematic partial cross-sectional view of the first embodiment of the present invention. FIG. 5 is a schematic diagram of an embodiment of a torque wrench controlled by the present invention. FIG. 6 is a schematic view of a torque wrench affected by a flexural stress according to the first embodiment of the present invention. FIG. 7 is a schematic partial cross-sectional view of a second embodiment of the present invention.

Claims (9)

A support type torque wrench includes: a main rod body provided with an accommodation space therein, the main rod body having a driving end and a mounting end, the driving end is provided with a driving part, and the driving part is used for receiving A work piece; an adjustment tube, one end of which is sleeved on the installation end; a torque adjustment component, which is provided between the accommodation space of the main rod body and the inside of the adjustment tube, the torque adjustment component has an elastic piece and A pushing member, one end of the elastic member abuts the pushing member; a transmission rod, one end of which is connected to the driving part; a force transmission device, which is disposed in the accommodation space and connected to the transmission rod and Among the pushing members, the force transmission device has a connecting member and a connecting rod, the connecting member is connected between the pushing member and the connecting rod, and the connecting rod is connected between the connecting rod and the driving portion. And a support member provided at the outer peripheral edge of the connecting member and the connecting rod, and the support member is in contact with the inner peripheral edge of the main rod body. The supporting torque wrench according to claim 1, wherein the supporting member is divided into a first supporting member and a second supporting member, the first supporting member is provided on an outer periphery of the engaging member, and the outer periphery of the connecting rod is provided. The edge is provided with the second support. The support type torque wrench according to claim 2, wherein an outer edge ring of the first support member is recessed with a receiving groove, and the receiving groove is provided with a resistance element set, and the resistance element is inside the main rod body. Peripheral contact. The support type torque wrench according to claim 3, wherein an inner peripheral edge of the second support member is stepped, the second support member has a first inner diameter and a second inner diameter, and the first inner diameter is smaller than The second inner diameter. The support type torque wrench according to claim 4, wherein the connecting rod has a first end portion and a second end portion opposite to each other, and the first end portion and the second end portion are connected to a middle portion, The first end portion is connected to the transfer rod, the second end portion is connected to the link member, and the second support member is disposed at the middle section portion. The supporting torque wrench according to claim 5, wherein a first positioning member is fixed between the transmission rod and the first end, and the first positioning member is disposed along an axial direction perpendicular to the main rod body. The support type torque wrench according to claim 6, wherein one end of the transmission rod is recessed with an action groove, and the first end portion is fixed in the action groove by the first positioning member. The support type torque wrench according to claim 5, wherein a second positioning member is fixed between the second support member and the middle section, and the second positioning member is disposed along an axial direction perpendicular to the main rod body. The support type torque wrench according to claim 5, wherein the outer diameter of the first end portion is smaller than the outer diameter of the middle portion, and the outer diameter of the middle portion is smaller than the outer diameter of the second end.