Improved adjustable torsion wrench structure

Abstract

The utility model relates to an improved adjustable torsion wrench structure, which is mainly characterized in that in an adjusting structure, elements such as a ball screw, a ball nut and a ball are utilized to replace an adjusting structure of a screw and a nut of a traditional torsion wrench, and the advantages of the ball screw, such as high positioning accuracy, high durable strength, high-speed forward and reverse transmission displacement and the like, are utilized; therefore, friction force for adjusting rotation of the torsion wrench is reduced, and labor is saved and the torsion wrench is accurately and rapidly adjusted.

Description

TECHNICAL FIELD

[0001] The utility model discloses an improved adjustable torque wrench structure, especially a kind of adjustment structure of adjustable torque wrench using ball screw structure, using the characteristics of ball screw, so that torque wrench is more labor-saving, efficient and more durable when adjusting torque, thereby replacing the adjustment structure of traditional torque wrench with screw and nut. BACKGROUND

[0002] Adjustable torque wrench is a kind of precision tool, mainly used when tightening screw (bolt, nut), in order to avoid over-tightening or over-looseness, a certain torque specification is applied, therefore, wrench needs to meet the requirement of different torque adjustment, and many adjustable torque wrenches appear in the market, which are divided into mechanical type and electronic type, and the utility model is only improved for the mechanical type adjustable torque wrench.

[0003] The existing mechanical adjustable torque wrench, please refer to relevant cases: China Taiwan new patent number: M434652 (screw 12), China Taiwan invention certificate number: I714469 (adjusting piece 50), China Taiwan new patent number: M434652 (adjusting screw 30), China Taiwan new patent number: M549139 (screw 50), China Taiwan new patent number: M556654 (adjusting screw 3), US invention patent number: US5662012 A (screw part B), US invention patent number: US8863624 B2 (adjustment screw member 31) … etc., wherein the adjustment structure of the disclosed torque wrench is implemented by screw and nut, as the torque required by wrench.

[0004] However, the above-mentioned cases and the adjustable torque wrench on the market at present all use screw structure as torque adjustment, such as Figure 1 The schematic view, screw structure converts rotary kinetic energy into radial linear motion to adjust the torque that wrench can withstand, and this way has the following disadvantages: larger friction, lower efficiency, when the torque value range of wrench is larger, the user needs more labor and time to adjust. UTILITY MODEL CONTENTS

[0005] In view of the above-mentioned shortcomings, the applicant has made improvement and innovation after deep research, and designs an improved adjustable torque wrench structure by integrating the actual use requirement, mainly using the advantages of ball screw to improve the shortcomings of traditional screw structure.

[0006] Ball screw is a common mechanical transmission element, widely used in various mechanical equipment, mainly as the rotation motion into linear motion, or linear motion into rotation, ball screw has high precision positioning, high strength and high speed reversible transmission conversion displacement characteristics, but not seen in the implementation of the adjustable torque wrench.

[0007] Wherein, the ball device includes: ball screw, a plurality of balls and ball nut, ball screw is a cylinder, circumferential surface is provided with spiral channel, for the displacement of the rotation; ball nut is a matching part of the ball screw, ball nut is provided with ball track inside, ball track and the spiral channel of the ball screw are matched with each other for the ball to be contained therein; the rotation of the ball nut makes the ball roll, to realize the conversion of energy transmission and displacement.

[0008] Therefore, the main purpose of the improved adjustable torque wrench structure of the utility model provides a kind of adjustable torque structure using ball screw, by the characteristics of ball screw, it will be more labor-saving, efficient and more durable when the torque wrench is rotated to adjust torque. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the schematic diagram of screw and nut inside the common adjustable torque wrench.

[0010] Figure 2 It is the three-dimensional schematic diagram of the improved adjustable torque wrench structure of the utility model.

[0011] Figure 3 It is the three-dimensional exploded view of the improved adjustable torque wrench structure of the utility model.

[0012] Figure 4 It is the three-dimensional exploded view of the ball device of the improved adjustable torque wrench structure of the utility model.

[0013] Figure 5 It is the side view sectional schematic diagram of the ball device of the improved adjustable torque wrench structure of the utility model.

[0014] Figure 6 It is the schematic diagram of the ball device of the improved adjustable torque wrench structure of the utility model. DETAILED DESCRIPTION

[0015] First, please refer to Figure 2 And Figure 3As shown: the utility model discloses adjustable torsion wrench structure, wrench head rod 3 is sequentially provided with: O ring 18, ejector pin 17, ejector pin seat 2, pressure spring 4 and push rod 6 are contained in torsion rod 1, the end of torsion rod 1 is sequentially provided with ball screw 51, A handle 7, ball nut 5, thrust bearing 8, O ring 13A, B handle 12, O ring 13B, two positioning pins 19, C handle 9 and C type buckle ring 91.

[0016] Ball nut 5 is worn with ball screw 51, and is contained in A handle 7, limit key 14 is arranged on the outer ring of ball nut 5, A handle 7 and ball nut 5 are consistent with the linkage, ball screw 51 is driven to rotate and adjust the torsion value of wrench.

[0017] The front end of push rod 6 is provided with positioning hole 62 for positioning pin 15 to pass through, positioning pin 15 is embedded with push rod 6 through the limiting groove 11 of torsion rod 1, so that the limiting groove 11 limits the linear axial reciprocating displacement path of positioning pin 15 and push rod 6 in torsion rod 1;In addition, limiting groove 61 is arranged on the end side of push rod 6 for containing limiting key 16, corresponding to the central perforation 90 of C handle 9, embedding groove 60 is arranged on the end of push rod 6 for embedding C type buckle ring 91, thereby the whole torsion wrench element group is connected.

[0018] Please refer to Figure 4 And Figure 5 As shown, the end of wrench torsion rod 1 is provided with the utility model ball device, including: ball screw 51, a plurality of balls 52 and ball nut 5, ball screw 51 is provided with spiral groove on the surface of cylinder, for displacement of rotating action;Ball nut 5 is a matching part of ball screw 51, ball nut 5 is provided with ball track 50 inside, ball track 50 and the spiral groove of ball screw 51 are matched for containing a plurality of balls 52 in them;The rotation of ball nut 5 makes the ball 52 roll, so that the torsion wrench is more labor-saving and efficient when rotating and adjusting.

[0019] Please refer to Figure 6 The ball device of the utility model is implemented in the schematic diagram of adjustable torsion wrench, wherein the ball device contains ball nut 5, ball 52 and ball screw 51, which are completely contained in A handle 7, B handle 12 and C handle 9, the user only needs to rotate A handle 7 to drive ball nut 5 and ball 52 to roll, and then drive ball screw 51 to produce axial displacement, while driving torsion rod 1 to displace, so as to change the compression or relaxation of pressure spring 4, thereby completing the adjustment of torsion;Because the ball device uses ball to reduce the energy loss caused by friction, the wrench can be more labor-saving and efficient when rotating and adjusting the torsion, so as to meet the needs of the user to adjust the required torsion value more quickly and labor-savingly.

[0020] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent application scope of the present application; equivalent changes or modifications made without departing from the spirit of the present application should be included in the patent application scope.

Claims

1. An improved adjustable torque wrench structure, characterized by, Including a ball device, the ball device includes: a ball screw, a plurality of balls and a ball nut; Wherein the ball screw is provided at the end of the wrench torque rod, and a spiral channel is provided around the cylindrical surface for the ball nut and the ball screw; The ball nut is internally provided with a ball track, and a plurality of balls are accommodated in the ball track after the ball nut is screwed with the ball screw; The rotation of the ball nut makes the balls roll, drives the axial displacement of the ball screw, and simultaneously drives the wrench torque rod, thereby changing the compression of the compression spring or loosening the compression, thereby completing the adjustment of the torque.

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