Wrench tool for disassembling and assembling end face hole part

Abstract

The utility model discloses a wrench tool for disassembling and assembling end face hole parts. The wrench tool comprises a central column; the side arms are arranged on the two opposite sides of the center column respectively, and strip-shaped adjusting holes extending in the length direction of the side arms are formed in the side arms; the grabbing pin assemblies are used for being inserted into the end face holes of the parts to be disassembled and assembled in a matched mode; wherein the grabbing pin assembly comprises a main structure body and a butterfly nut, the main structure body sequentially comprises a stud part, a sliding matching part, a lower limiting flange and a lower positioning column from top to bottom, the sliding matching part is movably arranged in the strip-shaped adjusting hole, the lower limiting flange is located below the side arm and attached to the lower surface of the side arm, and the lower positioning column is located below the side arm and used for being inserted into the end face hole in a matched mode; the lower inclined side walls on the two sides are distributed in a splayed shape with openings facing downwards, the sliding matching part is provided with two opposite inclined faces, and the two inclined faces of the sliding matching part are attached to the lower inclined side walls on the two sides. By the adoption of the scheme, the locking effect of the grabbing pin assembly is more stable, and force application of a wrench is better facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of spanner tools, in particular to a spanner tool for disassembling and assembling end face hole parts. Background Art

[0002] Various types of wrenches play a very important role in the assembly process of equipment and facilities, such as adjustable wrenches, open-end wrenches and plum wrenches used to tighten hexagon nuts, pipe clamps used to tighten round pipes, etc. The quality and effectiveness of tools / tooling determine the quality of assembly. Generally, customized fixed-size wrenches are inconvenient, difficult to use, and have poor durability.

[0003] End face parts refer to parts with flange structures and multiple holes on the flange. Such parts are often installed in a threaded connection manner, and special wrenches are required to tighten such parts. However, since the outer walls of such parts are often circumferential wall structures, it is not convenient to use large wrenches to clamp them.

[0004] In order to solve the above problems, the applicant has filed a Chinese patent application with the publication number CN111230785A and the publication date of the application is 2020.06.05. When in use, the distance between the two grabbing pins is adjusted according to the distance between the end face holes to make the distance the same. At this time, the grabbing pin is installed into the end face hole, and then the torque wrench is installed into the tenon. Turning the wrench can drive the rotation of the end face hole to achieve the purpose of tightening or loosening the parts. The grabbing pin in the patent application document is a cylindrical pin, and the two side walls of the adjustment hole are straight side walls. Since the grabbing pin is a cylindrical pin as a whole, even if the butterfly nut is fully tightened, in the process of rotating the end face hole parts, considering the weakness of thread locking, the position of the grabbing pin is not firm enough under the action of large torque, and it is easy to offset. Utility Model Content

[0005] The utility model aims to provide a wrench tool for disassembling and assembling end face hole parts, so that the locking effect of the pin grabbing assembly is more stable and more conducive to the wrench force application.

[0006] The purpose of the utility model is achieved as follows: a wrench tool for disassembling and assembling end face hole parts, comprising: a center column, the outer axial end face of the center column is provided with a wrench positioning groove; a pair of side arms located at two opposite sides of the center column, the side arms are provided with strip-shaped adjustment holes extending along the length direction thereof; a pair of grabbing pin assemblies for plugging into the end face holes of the parts to be disassembled and assembled, the two grabbing pin assemblies are respectively and adjustably plugged into the strip-shaped adjustment holes of the two side arms;

[0007] The pin grabbing assembly includes a main structure and a butterfly nut, wherein the main structure includes a stud portion, a sliding fitting portion, a lower limit flange and a lower positioning column from top to bottom, the butterfly nut is fitted with the stud portion above the side arm, the sliding fitting portion is movably arranged in the strip-shaped adjustment hole, the lower limit flange is located below the side arm and abuts against the lower surface of the side arm, and the lower positioning column is located below the side arm and is used to be plugged into the end hole;

[0008] Observed from a cross-sectional perspective, both side walls of the strip-shaped adjustment hole are divided into upper straight side walls and lower inclined side walls from top to bottom, and the lower inclined side walls on both sides are distributed in an eight-shaped shape with the openings facing downward, and the sliding fitting portion has two opposite inclined surfaces, and the two inclined surfaces of the sliding fitting portion are in contact with the lower inclined side walls on both sides.

[0009] Furthermore, the main structure of the pin grabbing assembly also includes a curved surface transition portion, and the upper end of the sliding fitting portion and the lower end of the stud portion are integrally connected by the curved surface transition portion.

[0010] Furthermore, the upper edge of the strip-shaped adjustment hole protrudes upward from the upper surface of the side arm to form a reinforcement protrusion, and the butterfly nut presses downward against the reinforcement protrusion when in a tightened state.

[0011] Furthermore, the upper side of the reinforcing protrusion is set as a planar nut positioning surface, and the butterfly nut presses downward against the nut positioning surface when in a tightened state.

[0012] Furthermore, the reinforcement protrusion has an inclined transition slope located on its outer side, and the transition slope is connected to the nut positioning surface and the upper surface of the side arm, so that the cross-sectional structure of the reinforcement protrusion is a right-angled trapezoid.

[0013] Furthermore, the stud portion is coaxially arranged with the lower positioning column.

[0014] Furthermore, the intersection of the upper straight side wall and the lower inclined side wall is set as an arc chamfer.

[0015] Furthermore, the cross section of the sliding fitting portion is trapezoidal, and based on its trapezoidal cross section, it extends into a block structure along the length direction of the strip-shaped adjustment hole.

[0016] The beneficial effects of the utility model are:

[0017] 1. After the butterfly nut is tightened, the axial force generated during locking is used to drive the lower limit flange upward against the lower surface of the side arm, and at the same time, the two inclined surfaces of the sliding fitting part are upwardly fitted against the lower inclined side walls on both sides, and the contact surface between the main structure of the pin grabbing assembly and the strip-shaped adjustment hole is increased by the contact of the inclined surfaces, thereby producing a more secure locking effect;

[0018] 2. When adjusting the pin grabbing assembly, loosen the butterfly nut to drive the sliding fitting part to move and adjust along the length direction of the strip adjustment hole. The two inclined surfaces of the sliding fitting part slide upward to fit the lower inclined side walls on both sides. At this time, the lower inclined side walls can guide the adjustment direction of the entire pin grabbing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the utility model.

[0020] Figure 2 yes Figure 1 AA section view in.

[0021] Figure 3 It is a half-section view of the utility model.

[0022] Figure 4 yes Figure 3 Enlarged view of part B in . DETAILED DESCRIPTION

[0023] The following will be combined with the attached embodiment of the utility model Figure 1-4 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 , 2 As shown, a wrench tool for disassembling and assembling end face hole parts comprises:

[0025] A hollow cylindrical center column 1, the outer axial end surface of the center column 1 is provided with a square or regular polygonal wrench positioning groove 1a for positioning the torque wrench, and the plug column of the torque wrench is inserted into the wrench positioning groove 1a to transmit torque when in use;

[0026] A pair of side arms 2 are located at two opposite sides of the central column 1, and the side arms 2 are provided with strip-shaped adjustment holes 201 extending along the length direction thereof. The central column 1 and the side arms 2 are made of tool steel, and the central column 1 and the side arms 2 are integrally cast (other molding processes, such as forging, are not excluded);

[0027] A pair of grabbing pin assemblies 3 are used to be inserted into the end holes of the parts to be disassembled and assembled. The two grabbing pin assemblies 3 are respectively and adjustably inserted into the strip-shaped adjustment holes 201 of the arms 2 on both sides.

[0028] Among them, the above-mentioned pin grabbing assembly 3 includes a main structure and a butterfly nut 301. The main structure includes a stud part 302, a sliding fitting part 304, a lower limit flange 305 and a lower positioning column 306 from top to bottom. The lower limit flange 305 is a circular flange, and the lower positioning column 306 is a cylinder. The stud part 302, the lower limit flange 305 and the lower positioning column 306 are coaxially arranged. The butterfly nut 301 is fitted with the stud part 302 above the side arm 2, and the sliding fitting part 304 is movably arranged in the strip adjustment hole 201. The lower limit flange 305 is located below the side arm 2 and is close to the lower surface of the side arm 2. The lower positioning column 306 is located below the side arm 2 and is used to mate with the end hole.

[0029] Observed from the cross-sectional perspective, both side walls (two long side walls) of the strip-shaped adjustment hole 201 are respectively divided into an upper straight side wall 201a and a lower inclined side wall 201b from top to bottom. The lower section of the stud portion 302 is movably arranged between the two upper straight side walls 201a. The lower inclined side walls 201b on both sides are arranged in an eight-shaped shape with the openings facing downward. The cross-section of the sliding fitting portion 304 is trapezoidal, and based on its trapezoidal cross-section, it extends into a block-shaped structure along the length direction of the strip-shaped adjustment hole 201. The sliding fitting portion 304 has two opposite inclined surfaces, and the two inclined surfaces of the sliding fitting portion 304 are in contact with the lower inclined side walls 201b on both sides.

[0030] After the butterfly nut 301 is tightened, the axial force generated during locking is used to drive the lower limit flange 305 upward against the lower surface of the side arm 2. At the same time, the two inclined surfaces of the sliding fitting part 304 are upwardly fitted with the lower inclined side walls 201b on both sides. The contact between the main structure of the pin grabbing assembly 3 and the strip adjustment hole 201 is increased by the contact of the inclined surfaces, resulting in a more secure locking effect.

[0031] When adjusting the pin grabbing assembly 3, loosen the butterfly nut 301 to drive the sliding fitting part 304 to move and adjust along the length direction of the strip adjustment hole 201, and the two inclined surfaces of the sliding fitting part 304 slide upward to fit the lower inclined side walls 201b on both sides. At this time, the lower inclined side walls 201b can guide the adjustment direction of the entire pin grabbing assembly 3.

[0032] When in use, the distance between the two pin grabbing assemblies 3 is adjusted according to the distance between the end holes of the end hole part, the lower positioning column 306 of the pin grabbing assembly 3 is installed into the end hole, and then the square plug column of the torque wrench is inserted into the square wrench positioning groove 1a (the center sleeve of the socket wrench simultaneously covers the hollow cylindrical center column 1), and the wrench can be turned to drive the rotation of the entire end hole part to achieve the purpose of tightening or loosening the end hole part. The torque wrench used in this embodiment refers to the patent with authorization announcement number CN104227639B, and other known commonly used wrench types are not excluded.

[0033] In order to improve the process structure and prevent cracking during casting, the upper end of the above-mentioned slip fit portion 304 and the lower end of the stud portion 302 are integrally connected by a curved transition portion 303, thereby preventing the connection between the upper end of the slip fit portion 304 and the lower end of the stud portion 302 from becoming a casting defect point.

[0034] The intersection of the upper straight side wall 201a and the lower inclined side wall 201b is configured as an arc chamfer to prevent cracking during casting.

[0035] As a preferred embodiment, in order to strengthen the structural strength of the side arm 2 and ensure its service life, the upper edge of the above-mentioned strip adjustment hole 201 protrudes upward from the upper surface of the side arm 2 to form a reinforcing protrusion 202, and the butterfly nut 301 presses downward against the reinforcing protrusion 202 when in a tightened state, thereby enhancing the structural strength of the side arm 2 at the position of the strip adjustment hole 201 and ensuring the service life of the tool.

[0036] As a preferred embodiment, in order to facilitate the positioning of the butterfly nut 301, the upper side of the reinforcing protrusion 202 is set as a planar nut positioning surface 202a, and the butterfly nut 301 presses downward against the nut positioning surface 202a when in a tightened state.

[0037] In order to facilitate demolding in the subsequent casting process, the above-mentioned reinforcement protrusion 202 has an inclined transition slope 202b on its outside. The transition slope 202b is equivalent to being inclined outward based on the nut positioning surface 202a. The transition slope 202b is connected to the nut positioning surface 202a and the upper surface of the side arm 2, so that the cross-sectional structure of the reinforcement protrusion 202 is a right-angled trapezoid.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A wrench tool for disassembling and assembling end face hole parts, comprising: A center column (1), wherein the outer axial end surface of the center column (1) is provided with a wrench positioning groove (1a); a pair of side arms (2) located at two opposite sides of the center column (1), wherein the side arms (2) are provided with strip-shaped adjustment holes (201) extending along the length direction thereof; and a pair of grabbing pin assemblies (3) for plugging into the end surface holes of the parts to be disassembled and assembled, wherein the two grabbing pin assemblies (3) are respectively and adjustably plugged into the strip-shaped adjustment holes (201) of the two side arms (2); The pin grabbing assembly (3) comprises a main structure and a butterfly nut (301), wherein the main structure comprises a stud portion (302), a sliding fitting portion (304), a lower limit flange (305) and a lower positioning column (306) from top to bottom, wherein the butterfly nut (301) is fitted with the stud portion (302) above the side arm (2), the sliding fitting portion (304) is movably arranged in the strip adjustment hole (201), the lower limit flange (305) is located below the side arm (2) and abuts against the lower surface of the side arm (2), and the lower positioning column (306) is located below the side arm (2) and is used for mating with the end hole; Observed from a cross-sectional perspective, both side walls of the strip-shaped adjustment hole (201) are divided into an upper straight side wall (201a) and a lower inclined side wall (201b) from top to bottom, and the lower inclined side walls (201b) on both sides are arranged in an "eight" shape with their openings facing downwards, and the sliding fitting portion (304) has two opposite inclined surfaces, and the two inclined surfaces of the sliding fitting portion (304) are in contact with the lower inclined side walls (201b) on both sides.

2. A wrench tool for disassembling and assembling end face hole parts according to claim 1, characterized in that: The main structure of the pin grabbing assembly (3) further comprises a curved surface transition portion (303), and the upper end of the sliding fitting portion (304) and the lower end of the stud portion (302) are integrally connected via the curved surface transition portion (303).

3. A wrench tool for disassembling and assembling end face hole parts according to claim 1, characterized in that: The upper edge of the strip-shaped adjustment hole (201) protrudes upward from the upper surface of the side arm (2) to form a reinforcement protrusion (202), and the butterfly nut (301) presses downward against the reinforcement protrusion (202) when in a tightened state.

4. A wrench tool for disassembling and assembling end face hole parts according to claim 3, characterized in that: The upper side of the reinforcing protrusion (202) is provided with a planar nut positioning surface (202a), and the butterfly nut (301) presses downward against the nut positioning surface (202a) when in a tightened state.

5. A wrench tool for disassembling and assembling end face hole parts according to claim 4, characterized in that: The reinforcing protrusion (202) has an inclined transition slope (202b) located on its outer side, and the transition slope (202b) is connected to the nut positioning surface (202a) and the upper surface of the side arm (2), so that the cross-sectional structure of the reinforcing protrusion (202) is a right-angled trapezoid.

6. A wrench tool for disassembling and assembling end face hole parts according to any one of claims 1 to 5, characterized in that: The stud portion (302) is coaxially arranged with the lower positioning column (306).

7. A wrench tool for disassembling and assembling end face hole parts according to claim 1, characterized in that: The intersection of the upper straight side wall (201a) and the lower inclined side wall (201b) is configured as an arc chamfer.

8. A wrench tool for disassembling and assembling end face hole parts according to claim 6, characterized in that: The cross section of the sliding fitting portion (304) is trapezoidal, and based on its trapezoidal cross section, it extends along the length direction of the strip-shaped adjustment hole (201) to form a block-shaped structure.

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