Detachable wrench chuck unit

Abstract

The utility model relates to the technical field of machining, and discloses a detachable wrench chuck unit which comprises a wrench rod part and a wrench head, the wrench rod part is formed at the end part of one side of the wrench head, and a clamping part is formed at the end part of the other side of the wrench head; the end, close to the wrench rod part, of the side wall of the wrench head forms a right-angle switching part. The extension rod has the advantages of being large in load, high in durability and the like, the defects of cracks, notches and the like are not prone to occurring, the disassembly and assembly smoothness can be improved, and the matching range of the extension rod can be widened.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, and more specifically, particularly relates to a detachable wrench chuck unit. Background Art

[0002] The modern mechanical processing industry generally uses machining centers (such as CNC machine tools) to manufacture industrial products, and the parts where the tool handles assembled in the machining center are connected to the tools are often connected using nuts. Nut connections are widely accepted by the industry due to their high degree of standardization, low cost, durability, and high precision. In normal processing, operators will frequently use wrenches to disassemble and assemble nuts to replace different tools, but the wrench heads on the market often have small loads, poor durability, and are prone to defects such as cracks and gaps, which reduce the smoothness of disassembly and assembly, and easily cause injuries to users. Summary of the invention

[0003] The utility model aims to provide a detachable wrench chuck unit for the technical problems existing in the prior art, which has a large load capacity, high durability and increased service life.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] The utility model provides a detachable wrench chuck unit, comprising a wrench rod and a wrench head, wherein one end of the wrench head forms the wrench rod, and the other end of the wrench head forms a clamping portion; a side wall of the wrench head close to the end of the wrench rod forms a right-angle transition portion.

[0006] Furthermore, the clamping portion includes clamping side walls that are arranged opposite to each other and a clamping bottom wall that is connected to the clamping side walls. The clamping side walls are parallel to the axis of the wrench rod.

[0007] Furthermore, the clamping bottom wall is an arc-shaped structure, and an arc transition portion is provided at the connection with the corresponding clamping side wall.

[0008] Furthermore, the side surface where the wrench head is connected to the clamping portion forms a transition portion.

[0009] Furthermore, the transition portion is chamfered at 45° to 80°.

[0010] Furthermore, a plurality of steps are provided between the wrench head and the end of the wrench stem.

[0011] Furthermore, the multi-step step portion includes a first arc segment and a second arc segment connected to each other.

[0012] Furthermore, the diameter of the first arc segment is greater than the diameter of the second arc segment.

[0013] Furthermore, the wrench stem and the wrench head have the same thickness.

[0014] Furthermore, a spring ejector pin is arranged on the wrench rod.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The wrench chuck unit of the utility model is conveniently engaged with the nut by providing a clamping portion; a right-angle transition portion is formed on the wrench head, so that the load of the wrench head is larger, the durability is high, and defects such as cracks and gaps are not easy to occur, and the disassembly and assembly fluency and the extension rod matching range are improved. The overall structure is simple, the operation is reliable, and it is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 It is the overall structure diagram of the detachable wrench chuck unit of the utility model.

[0019] Figure 2 This is another overall structural diagram of the detachable wrench chuck unit of the utility model.

[0020] Figure 3 It is a front view of the detachable wrench chuck unit of the utility model.

[0021] Figure 4 It is a schematic diagram of loosening a nut of the detachable wrench chuck unit of the utility model.

[0022] Figure 5 It is a schematic diagram of tightening a nut with a detachable wrench chuck unit of the utility model.

[0023] Among them, 10-wrench rod, 11-spring ejector, 20-wrench head, 21-clamping portion, 211-first clamping side wall, 212-second clamping side wall, 213-clamping bottom wall, 214-transition section, 22-transition portion, 23-right-angle connecting portion, 24-multi-step portion, 241-first circular arc segment, 242-second circular arc segment, 30-extension rod, 40-nut, 50-tool. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0025] The terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to the other element.

[0026] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] See also Figure 1 to Figure 3 As shown, the utility model provides a detachable wrench chuck unit, including a wrench rod 10 and a wrench head 20, wherein one end of the wrench head 20 forms the wrench rod 10; the other end of the wrench head 20 is provided with a snap-in groove and forms a snap-in portion 21, and the snap-in portion 21 cooperates with the bayonet on the outer peripheral surface of the nut to facilitate clamping, positioning and disassembly operations.

[0028] A side wall of the wrench head 20 close to the end of the wrench stem 10 forms a right-angle transition portion 23 , which can increase the load of the wrench head 20 .

[0029] Specifically, the overall structure of the wrench head 20 is a square contour structure. When subjected to force, the inner side is under pressure, and the right-angle transition portion 23 is not easily compressed; when the outer side is under tension, the right-angle transition portion 23 is not easily stretched, and the deformation resistance is higher and more stable, and it is not easy to get stuck, thereby improving the service life of the wrench head 20.

[0030] Furthermore, the clamping portion 21 includes a first clamping side wall 211, a second clamping side wall 212 and a clamping bottom wall 213. The first clamping side wall 211 and the second clamping side wall 212 are arranged opposite to and in parallel, and are parallel and symmetrical to the axis of the wrench rod 10, so as to facilitate the clamping operation between the clamping portion 21 and the nut.

[0031] The ends of the first clamping side wall 211 and the second clamping side wall 212 are respectively connected to the clamping bottom wall 213 of the arc structure, and the connection between the first clamping side wall 211 and the clamping bottom wall 213, and the connection between the second clamping side wall 212 and the clamping bottom wall 213 are respectively provided with arc transition parts 214. The arc transition parts 214 can reduce the stress at the turning point between the clamping side walls (211, 212) and the clamping bottom wall 213 in the clamping groove, and can improve the strength of the wrench head 20.

[0032] Furthermore, the side surface where the wrench head 20 is connected to the clamping portion 21 forms a transition portion 22, and the transition portion 22 adopts a chamfer of 45° to 80°. Compared with the existing wrench head, by setting a chamfer of a larger angle, the stress can be reduced to improve the strength and load of the wrench head 20. Specifically, the chamfer can be 45°, 50°, 60°, 75°, 80° or any value within the range, which can meet actual needs.

[0033] Furthermore, a multi-step portion 24 is provided at the connection between the wrench head 20 and the end of the wrench rod 10 to avoid air.

[0034] Specifically, since the wrench chuck unit, namely the wrench head 20 and the wrench rod 10, needs to be used in conjunction with the extension rod 30, a multi-step portion 24 is provided to provide a larger assembly space so that the wrench head 20 can be matched with extension rods 30 of different shapes and sizes, thereby avoiding interference between the wrench head 20 and the extension rod 30, and facilitating the selection of extension rods 30 of more sizes according to actual needs, thereby improving the scope of application of the wrench chuck unit.

[0035] Furthermore, the multi-step step portion 24 includes a first arc segment 241 and a second arc segment 242 connected to each other, which can improve strength and eliminate stress, and also play a role in avoiding air.

[0036] Specifically, the multi-step step 24 may not be limited to the two-stage arc segments (241, 242) described above, and may be increased according to actual needs. The diameters of the first arc segment 241 and the second arc segment 242 may be the same or different. In this embodiment, the diameter of the first arc segment 241 is larger than the second arc segment 242. The first arc segment 241 is used to eliminate stress, while the second arc segment 242 is used to provide an escape space. The arc segment setting optimizes the force distribution of the wrench head 20, so that each area of ​​the wrench head 20 is more evenly stressed, thereby extending the service life of the wrench head 20.

[0037] Furthermore, the wrench rod 10 and the wrench head 20 have the same thickness, which facilitates processing and reduces costs, and also makes the overall force of the wrench chuck unit more uniform, thereby increasing the service life of the wrench chuck unit.

[0038] Furthermore, a spring ejector pin 11 is provided on the wrench rod portion 10 to facilitate detachable connection with the extension rod 30 and to facilitate operation and use of the wrench chuck unit.

[0039] In other embodiments, the thickness of the wrench head 20 may be greater than the thickness of the wrench stem 10 , or the thickness of the wrench head 20 may gradually decrease from the clamping groove end to the wrench stem 10 , both of which can meet the needs.

[0040] In this embodiment, the material of the wrench shank 10 and the wrench head 20 is preferably tool steel, and the surfaces of the wrench shank 10 and the wrench head 20 may also be coated as needed, which can also increase the service life of the wrench chuck unit.

[0041] When the wrench chuck unit of the utility model is in use, the end of the wrench rod 10 is detachably connected with the extension rod 30 through the spring ejector pin 11, and the clamping portion 21 on the wrench head 20 is clamped with the bayonet on the outer peripheral surface of the nut 40 to achieve positioning. The extension rod 30 is operated to drive the nut 40 to rotate, and the nut 40 can be tightened or loosened, that is, the tool 50 can be removed or installed. Figure 4 and Figure 5 shown.

[0042] The utility model has a simple structure and reliable functions, can reduce production costs, and at the same time greatly improves the use strength, avoids the wear and cracking of the wrench head 20, and prolongs the service life of the wrench head 20 and the wrench chuck unit as a whole.

[0043] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A detachable wrench chuck unit, characterized in that: The utility model comprises a wrench shank and a wrench head, wherein one end of the wrench head forms the wrench shank, and the other end of the wrench head forms a clamping part; and the end of the side wall of the wrench head close to the wrench shank forms a right-angle transition part.

2. The detachable wrench chuck unit according to claim 1, characterized in that: The clamping portion comprises clamping side walls which are arranged opposite to each other and a clamping bottom wall which is connected to the clamping side walls opposite to each other, and the clamping side walls are parallel to the axis of the wrench rod.

3. The detachable wrench chuck unit according to claim 2, characterized in that: The clamping bottom wall is an arc-shaped structure, and an arc transition portion is arranged at the connection with the corresponding clamping side wall.

4. The detachable wrench chuck unit according to claim 1, characterized in that: The side surface where the wrench head is connected to the clamping portion forms a transition portion.

5. The detachable wrench chuck unit according to claim 4, characterized in that: The transition portion is chamfered at 45° to 80°.

6. The detachable wrench chuck unit according to any one of claims 1 to 5, characterized in that: A multi-step portion is arranged between the wrench head and the end of the wrench rod.

7. The detachable wrench chuck unit according to claim 6, characterized in that: The multi-step step portion includes a first arc segment and a second arc segment connected to each other.

8. The detachable wrench chuck unit according to claim 7, characterized in that: The diameter of the first arc segment is greater than the diameter of the second arc segment.

9. The detachable wrench chuck unit according to claim 1, characterized in that: The wrench shank and the wrench head have the same thickness.

10. The detachable wrench chuck unit according to claim 1, characterized in that: A spring ejector pin is arranged on the wrench rod.

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