Torque wrench with labor-saving adjustment and positioning function

Abstract

In the field of torque wrench technology, we provide a torque wrench with a labor-saving adjustment and positioning function. [Solution] A tubular torque rod 20 is pivotally attached to the rear outer circumference of the wrench head rod 10. A pressure pin 11 and a pressure pin seat 12 are provided at the tail end of the wrench head rod, and the bottom end of the pressure pin seat abuts against one end of a pressure spring 30. A torque adjustment assembly 40 and a handle 50 are assembled on the rear side of the torque rod. The ball screw 44, torque adjustment member 41, stepped turn button 42 and handle of the torque adjustment assembly are inserted and assembled by the pin rod, and an elastic member 43 is provided between the torque adjustment member and the stepped turn button. Furthermore, a thrust bearing 47 is provided between the ball screw and the positioning sleeve of the torque adjustment assembly to convert the surface contact pressure into a point or line rolling contact pressure, and a ball nut 48 is assembled to the ball screw and a washer 481 presses the other end of the pressure spring. The torque adjustment member is provided with a positioning tooth profile, which is used to position it relative to the annular tooth profile of the positioning sleeve, and the stepped turn allows for adjustment of locking, limiting, or releasing the torque adjustment member.

Description

Technical Field

[0001] This invention relates to the technical field of torque wrenches, and particularly to a torque wrench with a labor-saving adjustment and positioning function.

Background Art

[0002] The difference between a general wrench and a torque wrench lies in that the torque wrench has a torque setting function. That is, a release structure is provided inside the torque wrench. When the set torque is reached, vibration and sound are generated to inform the user that the force applied to the wrench has reached the set value. Most adjustable torque wrenches include a tubular rod. A working head is connected to one end of the tubular rod, a handle is provided at the other end of the tubular rod, and a torque structure is provided outside the tubular rod. The torque structure is connected to a push rod structure inside the tube. The push rod structure performs linear reciprocating displacement under the control of the torque structure, thereby compressing or relaxing the abutting torque adjustment component. The torque adjustment component presses a stretching rod inserted into the tube from the working head, and further adjusts the torque value of the working head. When the working head operates a threaded member such as a screw or a bolt and the tightening degree reaches the preset torque value, the wrench body generates a rocking angle with respect to the working head, and a prompting sound is emitted from inside the wrench body, and the operator can stop applying force continuously.

[0003] However, the above-mentioned conventional torque wrench has a torque structure that controls a push rod structure to perform linear reciprocating displacement, and further compresses or relaxes the abutting torque adjustment component. Its control method is based on a screw structure. The drive between screws is a surface contact method, and furthermore, the gravity pressure control of the spring for torque setting is applied, so it feels very heavy when the operator rotates the torque structure. Therefore, for example, if the operator is a woman, the problem of difficult adjustment may occur. Also, a general torque wrench needs to return to zero and release the pressure after use. However, the above-mentioned adjustment itself is already difficult, and it is necessary to rotate for a longer time to release the pressure by returning to zero, which becomes more difficult for the operator.

[0004] Therefore, developing an innovative structure that is more ideal and practical in addressing the problems inherent in the conventional structures described above is something that consumers genuinely desire, and it is also a goal and direction that relevant businesses should strive to achieve through research and development.

[0005] Therefore, based on many years of experience in the manufacturing, development, and design of related products, the inventor of this invention has finally completed this practical invention after detailed design and careful evaluation to achieve the above-mentioned objectives. [Overview of the project]

[0006] The main objective of this invention is to provide a torque wrench with a labor-saving adjustment and positioning function, wherein a thrust bearing is provided between the ball screw and the positioning sleeve of the torque adjustment assembly, converting surface contact pressure into point or line rolling contact pressure, a positioning tooth profile is provided on the torque adjustment member to position it relative to the annular tooth profile of the positioning sleeve, and a stepped turn allows adjustment operations of locking, limiting, or releasing the torque adjustment member.

[0007] To achieve the above objective, this invention provides a torque wrench with a labor-saving adjustment and positioning function. A tubular torque rod is pivotally attached to the rear outer circumference of the wrench head rod, a pressure pin and a pressure pin seat are provided at the tail end of the wrench head rod, the bottom end of the pressure pin seat abuts against one end of a pressure spring, and a torque adjustment assembly and a handle are assembled on the rear side of the torque rod. The ball screw, torque adjustment member, stepped screw, and handle of the torque adjustment assembly are inserted and assembled by the pin rod, an elastic member is provided between the torque adjustment member and the stepped screw, and a thrust bearing is provided between the ball screw and the positioning sleeve of the torque adjustment assembly, converting surface contact pressure into point or line rolling contact pressure. A ball nut is assembled to the ball screw and presses the other end of the pressure spring with a washer, a positioning tooth profile is provided on the torque adjustment member to position it relative to the annular tooth profile of the positioning sleeve, and the stepped screw allows for adjustment of locking, limiting, or releasing the torque adjustment member.

[0008] The technologies, means, and effects employed in this invention will be described in detail below with reference to preferred embodiments and drawings, thereby providing a deeper and more concrete understanding of the above-mentioned objectives, structure, and features of this invention. [Brief explanation of the drawing]

[0009] [Figure 1] This is a three-dimensional perspective view of one embodiment of the present invention. [Figure 2] This is a side cross-sectional plan view relating to one embodiment of the present invention. [Figure 3] This is an upper cross-sectional plan view relating to one embodiment of the present invention. [Figure 4] This is a three-dimensional exploded perspective view of one embodiment of the present invention, as seen from the rear. [Figure 5] This is a three-dimensional exploded perspective view of one embodiment of the present invention, as seen from the front. [Figure 6] This is a partial cross-sectional plan view showing a stepped turn according to one embodiment of the present invention in a state where it is positioned at the second step. [Figure 7] This is a partial cross-sectional plan view showing a stepped turn according to one embodiment of the present invention in a state where it is positioned at one step. [Figure 8] This is a partial cross-sectional plan view showing a stepped turn according to one embodiment of the present invention in a state where it is located at the zero step. [Figure 9] This is a three-dimensional exploded perspective view of a thrust bearing according to one embodiment of the present invention. [Figure 10] This is a three-dimensional exploded perspective view of a thrust bearing according to another embodiment of the present invention. [Modes for carrying out the invention]

[0010] This invention provides a torque wrench with a labor-saving adjustment and positioning function.

[0011] The purpose, features, and effects of this invention will be described in detail below with reference to embodiments and drawings, so that those skilled in the art may gain a further understanding and appreciation of them.

[0012] As shown in Figures 1 to 10, the torque wrench having a labor-saving adjustment and positioning function according to the present invention includes the following:

[0013] The wrench is characterized by comprising a wrench head rod 10, a tubular torque rod 20 pivotally attached to the rear outer circumference of the wrench head rod 10, a pressure pin 11 and a pressure pin seat 12 provided at the tail end of the wrench head rod 10, the bottom end of the pressure pin seat 12 contacting one end 31 of a pressure spring 30, and a torque adjustment assembly 40 and a handle 50 assembled on the rear side of the torque rod 20.

[0014] A torque adjustment member 41 is provided in the torque adjustment assembly 40, and the handle 50 and a stepped turn button 42 are assembled to the outside of the torque adjustment member 41. An elastic member 43 and a ball screw 44 are provided between the torque adjustment member 41 and the stepped turn button 42. The ball screw 44, the torque adjustment member 41, the stepped turn button 42 and the handle 50 are provided with a first pin hole 441, a second oval hole 411, a third oval hole 421 and a fourth pin hole 51, respectively, and a pin rod 45 is inserted and assembled through them. A positioning sleeve 46, a thrust bearing 47, a ball nut 48 and a washer 481 are incorporated in front of the torque adjustment member 41 on the ball screw 44, respectively. The washer 481 abuts against the other end 32 of the pressure spring 30, and the positioning sleeve 46 is fixed to the torque rod 20 by a fixing screw 21. The ball screw 44 is provided with a pressing surface 442 that presses against the first surface 471 of the thrust bearing 47, and the positioning sleeve 46 is provided with a pressure contact surface 461 that presses against the second surface 472 of the thrust bearing 47, converting the surface contact pressure into point or line rolling contact pressure. The end face of the positioning sleeve 46 is provided with a plurality of ring-row tooth profiles 462 that face one or more positioning tooth profiles 412 of the torque adjustment member 41. The stepped turn knob 42 is provided with one stepped marking 422, two stepped planes 423, two stepped grooves 424, and two stepped protrusions 425, and the torque adjustment member 41 is provided with a zero-step inclined groove 413, a first-step straight groove 414, a second-step flat base 415, and a protrusion 416. When the stepped turn knob 42 is rotated to the second position, the stepped protrusion 425 abuts against the base 415, the stepped plane 423 abuts against the protrusion 416, and the positioning tooth profile 412 of the torque adjustment member 41 strongly engages with the annular tooth profile 462 of the positioning sleeve 46, forming the positioning torque value effect after torque adjustment. When the stepped turn knob 42 is rotated to the first position, the stepped protrusion 425 enters the straight groove 414, and the torque adjustment member 41 receives thrust from the elastic member 43, causing the positioning tooth profile 412 of the torque adjustment member 41 to engage with the annular tooth profile 462 of the positioning sleeve 46. During torque adjustment, the positioning tooth profile 412 disengages and then re-engages, forming a click sound and creating the torque step adjustment state effect.When the stepped turn knob 42 is rotated to the zero position, the stepped protrusion 425 enters the inclined groove 413, disengaging the positioning tooth profile 412 of the torque adjustment member 41 from the annular tooth profile 462 of the positioning sleeve 46, allowing for quick torque adjustment or return to zero.

[0015] In the torque wrench having the aforementioned labor-saving adjustment and positioning function, at least one scale 60 is fixed to the torque rod 20.

[0016] As shown in Figures 9 and 10, in the torque wrench having the labor-saving adjustment positioning function, the thrust bearing 47 may be a ball thrust bearing or a needle thrust bearing.

[0017] Based on the above, the torque wrench with labor-saving adjustment and positioning function of this invention is indeed the first of its kind in the industry, fulfilling the novelty requirement of a new type, and its comprehensively innovative design conforms to the inventiveness requirement of a new type. Furthermore, a thrust bearing is provided between the ball screw and the positioning sleeve of the torque adjustment assembly, converting surface contact pressure into point or linear rolling contact pressure, positioning teeth are provided on the torque adjustment member to position it against the annular tooth profile of the positioning sleeve, and adjustment operations such as locking, limiting, or releasing the torque adjustment member by stepped turning knobs are possible, giving it excellent industrial applicability.

[0018] The foregoing describes the technical features of the present invention in detail with respect to preferred embodiments. However, those skilled in the art may make changes and modifications to the present invention without departing from its spirit and principles, and such changes and modifications shall all be included in the scope of the following utility model registration claims.

[0019] As described above, this invention provides a torque wrench with a labor-saving adjustment and positioning function, achieving all the objectives of this invention, the spatial configuration of its combined structure is not found in similar products, has not been disclosed prior to filing, and conforms to the provisions of the Utility Model Act; therefore, this application is filed in accordance with the Act.

Claims

1. A torque wrench having a labor-saving adjustment and positioning function, comprising a wrench head rod, a tubular torque rod pivotally attached to the rear outer circumference of the wrench head rod, a pressure pin and pressure pin seat provided at the tail end of the wrench head rod, one end of a pressure spring that the bottom end of the pressure pin seat abuts against, and a torque adjustment assembly and handle assembled on the rear side of the torque rod, The torque adjustment assembly is, Torque adjustment member and A stepped turn button is assembled to the outside of the torque adjustment member together with the handle, A ball screw comprising a ball screw, a torque adjustment member, a stepped turn button, and a handle, each having a first pin hole, a second oval hole, a third oval hole, and a fourth pin hole, through which a pin rod is inserted and assembled. A positioning sleeve fixed to the torque rod by a fixing screw, A thrust bearing in which a pressing surface provided on the ball screw presses against a first surface, and a pressure contact surface provided on the positioning sleeve presses against a second surface, thereby converting surface contact pressure into point or line rolling contact pressure, Ball nut and, Washer and Equipped with, The positioning sleeve, thrust bearing, ball nut, and washer are assembled in front of the torque adjustment member on the ball screw, and the washer abuts against the other end of the pressure spring. A torque wrench having a labor-saving adjustment and positioning function.

2. An elastic member is provided between the torque adjustment member and the stepped turnout, the torque adjustment member is provided with a zero-stage inclined groove, a first-stage straight groove, a second-stage flat base and protrusion, the end face of the positioning sleeve is provided with a plurality of ring-row teeth, the torque adjustment member is provided with one or more positioning teeth opposite to the ring-row teeth, the stepped turnout is provided with two stepped planes, two stepped grooves and two stepped protrusions, and when the stepped turnout is rotated to the second stage, the step A torque wrench having a labor-saving adjustment positioning function as described in claim 1, characterized in that the convex column abuts against the flat base, the stepped plane abuts against the protrusion to form a lock, when the stepped screw is rotated to one step, the stepped convex column enters the straight groove, the torque adjustment member receives the thrust of the elastic member and forms a limit, and when the stepped screw is rotated to zero step, the stepped convex column enters the inclined groove, disengaging the torque adjustment member from positioning and forming a release.

3. A torque wrench having a labor-saving adjustment and positioning function according to claim 2, characterized in that the thrust bearing is a ball thrust bearing or a needle thrust bearing.

4. A torque wrench having a labor-saving adjustment and positioning function according to claim 3, characterized in that at least one scale is fixed to the torque rod.

5. A torque wrench having a labor-saving adjustment positioning function according to claim 4, characterized in that the step-level turn knob is provided with one step-level indicator.

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