CN110757391A

CN110757391A - Wrench with preset force

Info

Publication number: CN110757391A
Application number: CN201911153177.4A
Authority: CN
Inventors: 郑瑞龙
Original assignee: Anji Yiqian Hardware Tools Co Ltd
Current assignee: Anji Yiqian Hardware Tools Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-02-07

Abstract

The invention relates to the technical field of hardware tools, in particular to a preset force wrench which comprises a handle body, a square block, a sound seat, a sealing spring, a torsion spring and the like, wherein the handle body interacts with the square block, the sound seat and the torsion spring, the sealing spring is sleeved on the outer side of the sound seat, a clamping groove is formed in the outer ring of one side, close to the square block, of the sound seat, a clamping spring is arranged in the clamping groove, a screw hole is formed in the side face of the handle body, the screw hole is a countersunk head screw hole, and an adjusting screw is arranged in the screw hole to complete the fixation of the sound seat. Due to the arrangement, internal parts are reduced, the assembly is simplified, the precision is improved, and the use is facilitated.

Description

Wrench with preset force

Technical Field

The invention relates to the technical field of hardware tools, in particular to a preset force wrench.

Background

In order to make the general consumer more easy to use in the years, various hand tools which are easy to operate or have humanized functions are continuously put into the market.

Chinese laid-open patent 2006200142910, torque wrench's automatic positioning structure and torque wrench sound seat thereof disclose a torque wrench's automatic positioning structure, are provided with compression spring between torque wrench's sound seat and propulsion post, in compression spring's both ends respectively are equipped with a bearing, at least one terminal surface of bearing is equipped with a locating body, the cover is equipped with a cushion collar around the sound seat, has solved accurate nature and smooth and easy nature. However, the problem that the precision of the wrench is affected due to the abrasion of the pipe wall caused by the back and forth movement of the sound seat in the working process is not solved. In addition, in the use process of the preset force wrench, deviation occurs due to abrasion, and precision fine adjustment cannot be performed according to the current situation except for replacement of parts; furthermore, the mounting relationship between the internal parts may affect the precision of the entire product.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a preset force wrench, which solves the problems of pipe wall abrasion and deviation in the use process in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the preset force wrench comprises a handle, a sleeve, an adjusting handle, a handle body, a push rod, a torsion spring and a sound seat, wherein the handle is connected with one end of the handle body, the other end of the handle body is connected with the sound seat, the sound seat is connected with the push rod through the torsion spring, the sleeve is wrapped on the outer sides of the handle body, the sound seat, the torsion spring and the push rod, the adjusting handle is arranged on the outer side of the push rod, a groove is formed in one end of the sound seat, a square block is placed in the groove, and the square block is in contact with the handle body; the other end of the sound seat is in contact with the torsion spring; a sealing spring is sleeved on the outer side of the sound seat, a clamping groove is formed in the outer ring of one side, close to the square block, of the sound seat, and a clamping spring is arranged in the clamping groove; the side surface of the handle body is provided with a screw hole, an adjusting screw is arranged in the screw hole, and the adjusting screw penetrates through the handle body and abuts against the inner wall of the sleeve.

Preferably, the sound seat comprises a cylindrical body, a counter bore is formed in the tail end of the body, and a chamfer is formed at the head end of the body and provided with a groove.

Preferably, the groove is formed by a groove bottom surface, a first surface, a second surface, a third surface and a fourth surface, wherein the first surface and the second surface are oppositely arranged, the included angle between the first surface and the second surface is 60-90 degrees, the third surface and the fourth surface are oppositely arranged, and the included angle between the third surface and the fourth surface is 4 degrees.

Preferably, the handle body is provided with a bulge corresponding to the first surface and the second surface, and the bulge forms an included angle of 30-45 degrees with the axis of the handle body.

Preferably, a steel ball is arranged between the sleeve and the handle body.

Preferably, the adjusting screw is a countersunk head screw, and the top end of the adjusting screw is spherical.

Preferably, the torsion spring with be provided with the gasket between the driving fit spring, the gasket includes gasket body and gasket mounting, the gasket body the front with gasket mounting fixed connection, the surface of gasket mounting is provided with a plurality of flexible bumps, the gasket mounting is the cylinder, begins to reduce by big to the other end diameter from the one end of connecting the gasket body.

Preferably, the adjusting handle and the sleeve are provided with scales.

Preferably, the material of the sealing spring is 65Mn, the hardness is 45-50 degrees, and no gap exists between the rings of the sealing spring.

Preferably, the pushing rod is provided with a limit screw.

(III) advantageous effects

The invention provides a preset force wrench. The method has the following beneficial effects:

through the interaction between adjusting nut, square, sound seat, driving fit spring and the sleeve pipe, reduced the assembly part of product, the cost is reduced, and reduced the wearing and tearing between each part, reduced the unsafe possibility of precision, in addition, optimized the precision fine setting when assembling, in the use, also can adjust the precision through corresponding equipment and personnel according to the actual conditions.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is a front view of the acoustic seat;

FIG. 4 is a side view of the acoustic seat;

FIG. 5 is a top view of an acoustic seat;

fig. 6 is a schematic structural view of the gasket.

In the figure: the device comprises a handle 1, a sleeve 2, an adjusting handle 3, an adjusting nut 4, a sound seat 5, a sealing spring 6, a snap spring 7, a torsion spring 8, a gasket 9, a limiting screw 10, a pushing rod 11, a handle body 12, a square 13, a screw hole 14, a protrusion 15, a steel ball 16, a groove 5-1, a clamping groove 5-2, a counter bore 5-3, a body 5-4, a first surface 5-5, a second surface 5-6, a third surface 5-7, a fourth surface 5-8, a gasket body 9-1, a gasket fixing part 9-2 and a flexible convex point 9-3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a preset force wrench, which comprises a handle 1, a sleeve 2, an adjusting handle 3, a handle body 12, a push rod 11, a torsion spring 8 and a sound seat 5, wherein the handle 1 and the handle body 12 are connected with each other, one end of the handle 1 is connected with one end of the handle body 12 through a nut, the other end of the handle body 12 is in contact connection with the sound seat 5, the sound seat 5 is connected with the push rod 11 through the torsion spring 8, the sleeve 2 wraps the outer sides of the push rod and the push rod 11 and is used for protecting internal parts, the sleeve 2 is flat, a user can conveniently take the wrench, the adjusting handle 3 is arranged on the outer side of the push rod 11, and scales are arranged on the adjusting handle 3 and the sleeve 2 and are used for determining preset force; as shown in fig. 3, 4 and 5, a groove 5-1 is arranged at one end of the sound seat 5, a square block 13 is arranged in the groove 5-1, the square block 13 is in contact with the handle body 12, and the square block 13 is fixed in the groove 5-1 under stress under the action of the handle body 12 and the groove 5-1; the other end of the sound seat 5 is in contact with the torsion spring 8, and when the wrench is subjected to preset force, the torsion spring 8 is compressed, so that the force acts on the sound seat 5; a sealing spring 6 is sleeved outside the sound seat 5, on one hand, the sealing spring 6 is convenient to install (can be bent), and on the other hand, the existence of the sealing spring 6 can ensure the linear movement of the sound seat 5; a clamping groove 5-2 is formed in the outer ring of one side, close to the square block 13, of the sound seat 5, a clamping spring 7 is arranged in the clamping groove 5-2, the clamping spring 7 prevents the driving fit spring 6 from moving forwards, and the driving fit spring 6 is prevented from being separated from the sound seat 5; the side surface of the handle body 12 is provided with a screw hole 14, the screw hole 14 is a countersunk screw hole, an adjusting screw 4 is arranged in the screw hole 14, the adjusting screw 4 is a countersunk screw, the top end of the adjusting screw 4 is spherical, the adjusting screw 4 penetrates through the handle body and is propped against the inner wall of the sleeve 2, the adjusting screw 4 is sunk in the handle body 12, and the exposed end is prevented from contacting the sleeve 2 to influence the work function;

the sound seat 5 comprises a body 5-4, the body 5-4 is cylindrical, a counter bore 5-3 is formed in the tail end of the body 5-4, the function is material saving, when the sound seat 5 is forged, the sound seat is easy to fill, material shortage is not easy to generate, and normal operation of later work is guaranteed; the head end of the body 5-4 is chamfered and provided with a groove 5-1, and the chamfer processing avoids friction between the sound seat 5 and the inner side of the sleeve 2 in later work;

the groove 5-1 is composed of a groove bottom surface, a first surface 5-5, a second surface 5-6, a third surface 5-7 and a fourth surface 5-8, as shown in figure 3, the first surface 5-5 and the second surface 5-6 are oppositely arranged, an included angle between the first surface 5-5 and the second surface 5-6 is 60-90 degrees, as shown in figure 4, the third surface 5-7 and the fourth surface 5-8 are oppositely arranged, and an included angle between the third surface 5-7 and the fourth surface 5-8 is 4 degrees, so that the square 13 can be limited in the direction, excessive movement cannot occur, and the included angle of 4 degrees is reserved for considering that the expansion is blocked when the expansion and contraction occur, and the normal turning of the square 13 is influenced; the included angle between the first face 5-5 and the second face 5-6 is 60-90 degrees, the square block 13 can turn along with the handle body 12 in the included angle, but the included angle is controlled to be 90 degrees so as to prevent the square block 13 from turning over and losing the interaction force with the handle body 12, and the function of the wrench is disabled.

As shown in figure 2, the handle 12 is provided with a bulge 15 corresponding to the first face 5-5 and the second face 5-6, the bulge 15 forms an included angle of 30-45 degrees with the axis of the handle 12, and the shape of the clamp is formed, and the function of the clamp is also to prevent the handle 12 from being separated from the square 13.

As shown in fig. 1, a plurality of steel balls 16 are provided between the sleeve 2 and the shank 12 in order to balance the shank 12 against wobbling in the pipe.

As shown in fig. 2, a gasket 9 is arranged between the torsion spring 8 and the sealing spring 6, the gasket 9 is composed of a gasket body 9-1 and a gasket fixing member 9-2, when viewed from the side, the gasket body 9-1 and the gasket fixing member 9-2 form a cutting t shape, they are fixedly connected, the gasket fixing member 9-2 is used for being clamped in a counter bore 5-3 of the sound seat 5, thus, the outer surface of the gasket fixing piece 9-2 is provided with a plurality of flexible salient points 9-3, the gasket fixing piece 9-2 is a cylinder, the diameter of the cylinder is reduced from one end connected with the gasket body 9-1 to the other end, so that the whole gasket 9 can be perfectly fitted on the sound seat 5, the head of the torsion spring 8 is prevented from contacting with the head of the close spring 6, so that the head of the torsion spring 8 and the head of the closing spring 6 are hooked to each other or are nested with each other.

The material of the sealing spring 6 is 65Mn, the hardness is 45-50 degrees, and no gap exists between the rings of the sealing spring 6. When the sealing spring 6 is mounted, the sealing spring 6 can be bent by snapping according to actual conditions, so that the mounting is easier.

The push rod 11 is provided with a limit screw 10, so that the adjusting handle 3 is prevented from excessively pressing the torsion spring 8 and the sealing spring 9, and the precision is prevented from being influenced.

The working principle is as follows: when the sound seat fixing device works, in the assembling process, the adjusting nut 4 is adjusted to enable the handle body 12 to laterally move, the square 13 is acted, the side face of the square 13 is inclined, the square 13 has transverse pressure, the square 13 acts on the sound seat 5, the sound seat 5 can act on the sealing spring 6, the sealing spring 6 and the sleeve 2 generate friction force, the sound seat 5 is fixed in a direction changing mode, and the effect that original parts achieve the effect of fixing the sound seat 5 is reduced. When the tool works, the adjusting handle 3 is acted, the torsion to be set is selected, the handle 1 and the nut act to generate certain force, when the force reaches a preset value, the force borne by the handle 1 can interact with each other along the handle body 12, the sound seat 5 and the torsion spring 8, so that the force borne by the inclined square block 13 and the groove 5-1 of the sound seat 5 act to generate collision sound, and therefore a user is reminded that the preset value is reached, and the phenomenon that the nut is scrapped due to excessive force is avoided.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The preset force wrench comprises a handle (1), a sleeve (2), an adjusting handle (3), a handle body (12), a push rod (11), a torsion spring (8) and a sound seat (5), wherein the handle (1) is connected with one end of the handle body (12), the other end of the handle body (12) is connected with the sound seat (5), the sound seat (5) is connected with the push rod (11) through the torsion spring (8), the sleeve (2) wraps the handle body (12), the sound seat (5), the torsion spring (8) and the push rod (11), the adjusting handle (3) is arranged on the outer side of the push rod (11), and the preset force wrench is characterized in that a groove (5-1) is formed in one end of the sound seat (5), a square block (13) is arranged in the groove (5-1), and the square block (13) is in contact with the handle body (12); the other end of the sound seat (5) is in contact with the torsion spring (8); a sealing spring (6) is sleeved on the outer side of the sound seat (5), a clamping groove (5-2) is formed in the outer ring of one side, close to the square block (13), of the sound seat (5), and a clamping spring (7) is arranged in the clamping groove (5-2); the side surface of the handle body (12) is provided with a screw hole (14), an adjusting screw (4) is arranged in the screw hole (14), and the adjusting screw (4) penetrates through the handle body and abuts against the inner wall of the sleeve (2).

2. The wrench as claimed in claim 1, wherein the acoustic seat (5) comprises a body (5-4), the body (5-4) is cylindrical, a counter bore (5-3) is formed at the end of the body (5-4), and a chamfer is formed at the head end of the body (5-4) and a groove (5-1) is formed at the head end of the body (5-4).

3. The pre-set power wrench as claimed in claim 1, wherein the recess (5-1) is formed by a slot bottom and a first face (5-5), a second face (5-6), a third face (5-7) and a fourth face (5-8), the first face (5-5) and the second face (5-6) being arranged opposite each other with an angle of 60-90 ° therebetween, the third face (5-7) and the fourth face (5-8) being arranged opposite each other with an angle of 4 ° therebetween.

4. The wrench as claimed in claim 1, wherein the shank (12) is provided with protrusions (15) at locations corresponding to the first (5-5) and second (5-6) faces, the protrusions (15) forming an angle of 30-45 ° with the axis of the shank (12).

5. Preset force wrench as claimed in claim 1, characterized in that a steel ball (16) is arranged between the sleeve (2) and the shank (12).

6. The wrench as claimed in claim 1, wherein the adjusting screw (4) is a countersunk head screw, and the top of the adjusting screw (4) is spherical.

7. The wrench with preset force according to claim 1, wherein a gasket (9) is arranged between the torsion spring (8) and the sealing spring (6), the gasket (9) comprises a gasket body (9-1) and a gasket fixing member (9-2), the front surface of the gasket body (9-1) is fixedly connected with the gasket fixing member (9-2), the outer surface of the gasket fixing member (9-2) is provided with a plurality of flexible salient points (9-3), the gasket fixing member (9-2) is a cylinder, and the diameter of the cylinder decreases from one end connected with the gasket body (9-1) to the other end.

8. Preset force wrench as claimed in claim 1, characterized in that the adjustment handle (3) and the sleeve (2) are provided with graduations.

9. The wrench as claimed in claim 1, wherein the sealing spring (6) is 65Mn, has a hardness of 45-50 °, and has no gap between the rings of the sealing spring (6).

10. Preset force wrench as claimed in claim 1, characterized in that the pushing rod (11) is provided with a limit screw (10).