CN112775878A

CN112775878A - Cylindrical wrench

Info

Publication number: CN112775878A
Application number: CN202110018151.XA
Authority: CN
Inventors: 郝利民; 贾金山; 阚博涵
Original assignee: CETC 11 Research Institute
Current assignee: CETC 11 Research Institute
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-05-11

Abstract

The invention discloses a barrel wrench, comprising: the device comprises a cylinder body 1, an expansion plug 2 and a pull rod 3; the expansion plug 2 is arranged in the cylinder 1; one end of the pull rod 3 is fixed with the expansion plug 2, and the other end of the pull rod extends out of the cylinder 1; the barrel 1 is provided with a preset number of cutting seams 14 along the axial direction, and the inner wall of the barrel 1 is also provided with a conical surface 12; one end of the cylinder body 1 is provided with a cylinder body opening 11, and the expansion plug 2 can move along the conical surface 12 under the driving of the pull rod 3 so as to change the size of the cylinder body opening 11. According to the invention, the barrel opening is arranged at one end of the barrel, the expansion plug is driven by the pull rod to move along the conical surface, the effect of changing the size of the barrel opening is realized, and the wrench effect is realized, so that the problem that the thin-wall cylindrical part is not easy to disassemble and assemble during threaded connection in the prior art is solved.

Description

Cylindrical wrench

Technical Field

The invention relates to the field of mechanical equipment tools, in particular to a barrel-shaped wrench.

Background

With the miniaturization development of electronic equipment structures, the design of photoelectric aiming device products increasingly requires small size and light weight, and as shown in fig. 1, the design of the lens cone connection part is also increasingly light and thin. In the production process, the difficulty of dismounting is increased when the two lens cones are connected in a threaded manner. As shown in fig. 1, the first connecting portion 101 and the second connecting portion 102 need to be connected in the process of disassembly and assembly, because the force application area is too small, no proper assembling tool is provided, and the lens barrel can only be directly screwed or unscrewed by hand, the tightness is inconsistent, the lens barrel is easy to deform, the quality problem of the product is often caused, the hidden trouble is brought to the product, and even irreparable loss is caused.

Disclosure of Invention

The embodiment of the invention provides a cylindrical wrench, which is used for solving the problem that when a thin-wall cylindrical part is in threaded connection, if an external force point does not exist on one side, the thin-wall cylindrical part is not easy to disassemble and assemble in the prior art.

An embodiment of the present invention provides a barrel wrench, including: the device comprises a cylinder body 1, an expansion plug 2 and a pull rod 3;

the expansion plug 2 is arranged in the cylinder body 1;

one end of the pull rod 3 is fixed with the expansion plug 2, and the other end of the pull rod extends out of the cylinder 1;

the barrel 1 is provided with a preset number of cutting seams 14 along the axial direction, and the inner wall of the barrel 1 is also provided with a conical surface 12;

one end of the cylinder body 1 is provided with a cylinder body opening 11, and the expansion plug 2 can move along the conical surface 12 under the driving of the pull rod 3 so as to change the size of the cylinder body opening 11.

In one embodiment, the cylinder 1 and the pull rod 3 are in threaded fit, and the pull rod 3 is screwed to pull the expansion plug 2.

In an embodiment, a fit clearance is provided between the pull rod 3 and the expansion plug 2, and the fit clearance is used for ensuring that the expansion plug 2 axially moves along with the pull rod 3 and does not rotate along with the pull rod 3.

In one embodiment, the other end of the pull rod 3 is provided with an operating portion 4.

In one embodiment, the operation portion 4 is provided with an auxiliary hole 41, and the auxiliary hole 41 is used for matching with an external extension rod to increase the screwing arm of force.

In one embodiment, a groove 15 is further formed at the other end of the cylinder 1, and the groove 15 is used for reducing the resistance in the process of changing the size of the cylinder opening 11.

In an embodiment, when two or more cutting seams 14 are formed on the cylinder 1, the two or more cutting seams 14 are symmetrically distributed.

In one embodiment, the barrel 1 is greater than 80mm in length.

In one embodiment, the pull rod 3 and the expansion plug 2 are fixed by reverse threads.

According to the embodiment of the invention, the barrel opening is formed in one end of the barrel, the expansion plug is driven by the pull rod to move along the conical surface, the effect of changing the size of the barrel opening is realized, and the wrench effect is achieved, so that the problem that the thin-wall cylindrical part is not easy to disassemble and assemble during threaded connection in the prior art is solved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of a prior art electronic equipment configuration;

FIG. 2 is a cross-sectional view of a barrel wrench in accordance with an embodiment of the present invention;

fig. 3 is a schematic external view of a barrel wrench according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

An embodiment of the present invention provides a barrel wrench, as shown in fig. 2, including: the device comprises a cylinder body 1, an expansion plug 2 and a pull rod 3;

the expansion plug 2 is arranged in the cylinder body 1;

As shown in fig. 2, in the present embodiment, the cylinder 1 is provided with a predetermined number of cutting seams 14 along the axial direction, and the inner wall of the cylinder 1 is further provided with a conical surface 12. When the opening 11 of the cylinder body expands, the contact area can be increased, the friction force is increased, and the deformation of the inner lens cone under the stress is reduced. One end of the pull rod 3 is fixed with the expansion plug 2, and the pull rod can drive the expansion plug 2 to move, so that the expansion plug 2 is in contact with different positions of the conical surface 12, and the size of the opening 11 of the barrel body is changed. The size of the outer lens cone of the opening 11 of the cylinder body is slightly smaller than that of the inner lens cone of a spanner to be used, for example, the outer diameter of the cylindrical spanner is smaller than the inner diameter of a workpiece by 0.2-0.3 mm, and the radian of the outer lens cone is basically consistent with that of the inner lens cone.

The wall thickness of barrel spanner in this embodiment can adopt barrel opening 11 part slightly thin, for example barrel opening 11 part wall thickness is 1 ~ 2mm, and the rest thickens to increase the rigidity of whole barrel spanner. The width and the wall thickness of the cutting seam 14 in the embodiment can be determined according to actual use conditions, for example, the gap of the cutting seam can be 1mm, so that the cylindrical shape can be restored when the wrench is used for removing force, and the wrench is convenient to use next time.

The barrel-shaped wrench can realize the disassembly and assembly of the barrel-shaped threaded connecting piece, has no force point on one end of the thin-wall barrel-shaped connecting piece, and can be used as a special tool.

The cylindrical wrench has the advantages that the inner cylinder is uniformly stressed, the stress area is large, the clamping is firm, the force application is controllable, the thin-wall cylindrical part is not easy to deform, and the operation is simple and convenient.

In this embodiment, as shown in fig. 2, an opening is formed at the end of the barrel 1 away from the opening 11 of the barrel, and a thread 16 is formed in the opening, and the thread 16 is engaged with the screw of the pull rod 3. The expansion plug 2 can be driven to move along the conical surface 12 by screwing the pull rod 3. The pull rod 3 can adopt fine threads, so that the expansion stress of the cylinder body is uniform and slow, and the overlarge force is avoided. The diameter of the screw part of the pull rod 3 can be determined according to the size of the barrel wrench, and the fine thread specifications of M6, M8, M10 and the like can be generally adopted

In the embodiment, the expansion plug 2 and the pull rod 3 are fixed together, wherein a fit clearance is arranged between the expansion plug 2 and the pull rod 3, and the fit clearance is used for realizing that the expansion plug does not rotate along with the pull rod when moving back and forth along the conical surface of the inner cylinder, so that the friction force during movement is reduced, and the operation is labor-saving. One end of the pull rod 3 is fixed with the expansion plug 2 by reverse threads, so that the spanner is not easy to loosen after being locked.

As shown in fig. 2 and 3, in this embodiment, the other end of the pull rod 3 is provided with an operation portion 4, the operation portion 4 of the pull rod 3 mainly realizes diameter enlargement and arm of force enlargement, and the surface of the operation portion 4 can be knurled for convenient manual operation. The middle of the pull rod part is provided with an auxiliary hole 41 with the size larger than that of the pull rod part

When force is needed to be applied, the force arm can be increased by using the extension bar.

The one end of keeping away from barrel opening 11 at barrel 1 sets up recess 15, and the fluting department wall thickness of recess 15 is 1 ~ 2mm, and the groove width is 3 ~ 5mm, and the purpose of recess 15 is to overcome the resistance that self warp when reducing the spanner and expand when opening during the operation, and furthest transmits the effort to the inner barrel on, also makes the spanner operate laborsavingly simultaneously.

In this embodiment, in order to ensure that the force is uniformly applied when the opening 11 of the cylinder is expanded, two or more cutting seams 14 are symmetrically distributed. For example, in some embodiments, 4 cutting seams 14 may be provided, each of which is distributed at 90 degrees, although other numbers of cutting seams and other arrangements are possible.

In one embodiment, the barrel 1 is greater than 80mm in length.

In this embodiment, the size design of cylindric spanner, a mode can be that the length of barrel 1 is big 80mm, for example 90mm, makes things convenient for operating personnel to hand from this, and the barrel length also makes the expansion moment grow, operates laborsavingly.

It should be noted that, in this document, 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A barrel wrench, comprising: the device comprises a cylinder body (1), an expansion plug (2) and a pull rod (3);

the expansion plug (2) is arranged in the cylinder body (1);

one end of the pull rod (3) is fixed with the expansion plug (2), and the other end of the pull rod extends out of the cylinder body (1);

the barrel (1) is provided with a preset number of cutting seams (14) along the axial direction, and the inner wall of the barrel (1) is also provided with a conical surface (12);

one end of the cylinder body (1) is provided with a cylinder body opening (11), and the expansion plug (2) can move along the conical surface (12) under the driving of the pull rod (3) so as to change the size of the cylinder body opening (11).

2. A barrel wrench as claimed in claim 1, characterised in that the barrel (1) and the pull rod (3) are threadedly engaged to screw the pull rod (3) to effect pulling of the expander plug (2).

3. A barrel wrench as claimed in claim 2, characterised in that a fit clearance is provided between the pull rod (3) and the expansion plug (2), said fit clearance being adapted to ensure that the expansion plug (2) follows the pull rod (3) axially and does not rotate with the pull rod (3).

4. A barrel wrench as claimed in claim 1, in which an operating portion (4) is provided on the other end of the pull rod (3).

5. A barrel wrench as claimed in claim 4, in which the operating portion (4) is provided with an auxiliary hole (41), the auxiliary hole (41) being adapted to engage an external extension rod to increase the torque arm of the wrench.

6. A barrel wrench as claimed in any one of claims 1 to 5, wherein a recess (15) is provided in the other end of the barrel (1), said recess (15) being adapted to reduce resistance to changes in the size of the barrel opening (11).

7. A barrel wrench as claimed in any one of claims 1 to 5, wherein, in the case where two or more cutting slits (14) are provided in said barrel (1), said two or more cutting slits (14) are symmetrically disposed.

8. A barrel wrench as claimed in any one of claims 1 to 5, in which the barrel (1) is greater than 80mm in length.

9. A barrel wrench as claimed in any one of claims 1 to 5, in which the pull rod (3) is secured to the expansion plug (2) by means of a reverse thread.