Anti-slip sleeve for mounting and dismounting fasteners

Abstract

The utility model pertains to the field of technology relating to bushings, in particular to an anti-slip bushing for mounting and dismounting a fastener. The anti-slip bushing for mounting and dismounting a fastener includes a bushing body. The bushing body includes a coaxially arranged leading bushing and a driven bushing. A through leading hole is formed in the leading bushing. A through driven hole is formed in the driven bushing for inserting a fastener. The driven hole is a polygon. Between two adjacent faces of the bore of the driven hole, a relief groove of the driven hole is formed. In the middle part of the inner wall of said driven hole, a buffer groove in a wavy shape is formed. The number of faces of the bore of the driven hole is an even number. Two adjacent faces of the bore of said driven hole represent a flat face of the hole and a face of the hole having said buffer groove, respectively.The technical result of the utility model is to prevent slippage of the fastener, which facilitates the installation and removal of the fastener. 6 clauses, 3 figs.

Description

[0001] Technical field

[0002] The utility model relates to the field of technology concerning bushings, in particular to an anti-slip bushing for mounting and dismounting a fastener.

[0003] Technology Level

[0004] Bushings are used as accessories for power tools or ratchet wrenches. The bushing hole is usually a regular hexagon and is used to tighten and loosen fasteners such as bolts and nuts. To facilitate connection and disconnection between the bushing hole and the fastener, the hole diameter is usually slightly larger than the outside diameter of the fastener. When the bushing rotates the fastener, the torque from the edges of the hole is concentrated on the areas of the fastener near its edges. Excessive torque causes wear and deformation of the fastener, causing slippage, making removal and installation of the fastener more difficult.

[0005] The essence of the utility model

[0006] The purpose of the utility model is to create an anti-slip sleeve that eliminates the drawback of the specified technical solution, preventing slippage of the fastener and thereby facilitating the dismantling and installation of the fastener.

[0007] To solve the said technical problem, a utility model is proposed: an anti-slip sleeve for mounting and dismounting a fastener, including a sleeve body, said sleeve body includes a coaxially located leading sleeve and a driven sleeve, in said leading sleeve a through leading hole is made, in said driven sleeve a through driven hole is made for inserting a fastener, said driven hole is a polygon, between two adjacent faces of the hole of said driven hole a relief groove of the driven hole is made, and in the middle part of at least one of the inner walls of said driven hole a buffer groove is made in a wavy shape.

[0008] As an option, the said buffer groove includes two inner grooves and an outer projection located between the two inner grooves, making the said buffer groove have a W-shaped wave shape.

[0009] As an option, the specified driven hole is a regular polygon.

[0010] As an option, the number of hole faces of the specified driven hole is an even number.

[0011] As an option, said two adjacent faces of the hole of said driven hole are a flat face of the hole and a face of the hole having said buffer groove, respectively.

[0012] As an option, said leading hole has a non-cylindrical inner surface, said leading hole inner surface is a regular polygon, and a leading hole relief groove is formed between two adjacent faces of the hole of said leading hole.

[0013] As an option, a coaxially located central ring is formed between the said leading hole and the said driven hole, ensuring mutual communication between the leading hole and the driven hole, the inner diameter of the said central ring is smaller than the inner diameter of the said driven hole.

[0014] As an option, a knurling is provided between the specified driving sleeve and the specified driven sleeve.

[0015] As an option, the specified outside diameter of the driving sleeve is larger than the specified outside diameter of the driven sleeve.

[0016] Compared with the prior art, the advantageous effect of the utility model is as follows:

[0017] In the anti-slip sleeve of this utility model, the leading hole is used for insertion and assembly with the drive end of a power tool or the drive end of a ratchet wrench. The slave hole is designed for insertion and connection with a fastener, which can be a bolt or nut. When the fastener is inserted into the slave hole, each relief groove in the slave hole provides offset relative to each face of the fastener, facilitating mating of the fastener with this anti-slip sleeve and preventing wear and deformation of the fastener faces caused by stress concentrations during rotation of the fastener by this sleeve.In addition, the buffer groove has a wavy shape: the peak part of the buffer groove contacts the outer wall of the fastener or is in a gap with it, and the valley part of the buffer groove provides a reserve space to prevent stress concentration and avoid slippage of the fastener, thereby facilitating the dismantling and installation of the fastener.

[0018] Brief description of graphic materials

[0019] Fig. 1 is a schematic diagram of the structure of the sleeve 1 according to the embodiment.

[0020] Fig. 2 is a schematic diagram of the structure of the sleeve 2 according to the embodiment.

[0021] Fig. 3 shows a sectional view of the bushing according to the embodiment.

[0022] In the pictures:

[0023] 1 - sleeve body;

[0024] 11 - leading sleeve;

[0025] 101 - leading hole;

[0026] 102 - relief groove of the leading hole;

[0027] 12 - driven sleeve;

[0028] 103 - driven hole;

[0029] 104 - relief groove of driven hole;

[0030] 105 - central ring;

[0031] 106 - knurling;

[0032] 2 - buffer groove;

[0033] 21 - internal groove;

[0034] 22 - outer projection.

[0035] Implementation of a utility model

[0036] Below, the utility model is described in detail with reference to embodiments and accompanying drawings.

[0037] With reference to Fig. 1, 2 and 3, an anti-slip sleeve for mounting and dismounting a fastener includes a sleeve body 1, the sleeve body 1 includes a leading sleeve 11 and a driven sleeve 12, the leading sleeve 11 and the driven sleeve 12 are integrally molded and arranged coaxially, the outer diameter of the leading sleeve 11 is larger than the specified outer diameter of the driven sleeve 12, a knurling 106 is formed between the leading sleeve 11 and the driven sleeve 12. A through leading hole 101 is formed in the leading sleeve 11, passing along its axis, the leading hole 101 has a non-cylindrical inner surface, the inner surface of the leading hole 101 is a regular polygon, as an option, the leading hole 101 has a square shape, between the two the adjacent edges of the opening of the said leading opening 101 form a relief groove of the leading opening 102. The leading opening 101 serves for inserting, connecting and assembling the drive end of the power tool.The relief grooves of the drive bore 102 of the drive bore 101 are designed to provide clearance for the corner portions of the power tool's drive end, preventing slippage between the drive end of the power tool and the drive bore 101 due to stress concentration during rotation of the bushing by the power tool. Furthermore, the drive bore 101 can also be used to insert and engage ratchet wrenches with the drive end.

[0038] A through driven hole 103 is formed in the driven sleeve 12, passing along its axis, the driven hole 103 is a regular polygon, and the number of faces of the hole of the driven hole 103 is an even number.The driven hole 103 serves to insert a fastener, the fastener can be a bolt or a nut, the head of the bolt and the nut are usually a regular hexagon, respectively, the driven hole 103 is a regular hexagon, two adjacent faces of the hole of the driven hole 103 are a flat face of the hole and a face of the hole having a buffer groove 2, respectively, the buffer groove 2 is made in the middle position of the corresponding face of the hole of the driven hole 103, the buffer groove 2 includes two internal grooves 21 and an external projection 22 located between the two internal grooves 21, due to which the buffer groove 2 has a W-shaped wavy shape, the internal grooves 21 are part of the depression of the buffer groove 2, the external projection 22 is part of the peak of the buffer groove 2, and between the two adjacent faces of the hole of the driven hole 103 a relief groove of the driven hole is made 104.

[0039] When using the sleeve, the drive end of the power tool is inserted into the driving hole 101, the fastener is aligned with the slave hole 103 and inserted into it. When the fastener is inserted into the slave hole 103, each relief groove of the slave hole 104 provides a displacement relative to each edge of the fastener, facilitating the mating of the fastener with this anti-slip sleeve and preventing wear and deformation of the edges of the fastener caused by stress concentration when the fastener is rotated by this sleeve. In addition, the buffer groove 2 has a wavy shape: the peak portion of the buffer groove 2 contacts the outer wall of the fastener or is in a gap with it, and the valley portion of the buffer groove 2 provides a reserve space to prevent stress concentration and prevent slippage of the fastener, thereby facilitating the disassembly and assembly of the fastener.

[0040] Between the leading hole 101 and the slave hole 103, a central ring 105 is formed coaxially, ensuring mutual communication between the leading hole 101 and the slave hole 103. As an option, the central ring 105 has an annular structure, the inner wall has the shape of a stepped hole, the inner diameter of the central ring 105 is smaller than the inner diameter of the slave hole 103, so that the end face of the central ring 105 contacts the fastener inserted into the slave hole 103, thereby limiting the insertion stroke of the fastener into the slave hole 103.

[0041] It should be noted that the above are only typical examples of the implementation of this utility model. Furthermore, the utility model may have many other specific embodiments. All technical solutions obtained through equivalent replacement or equivalent transformation fall within the scope of legal protection required by the utility model.

Claims

1. An anti-slip sleeve for mounting and dismounting a fastener, characterized in that it includes a sleeve body (1), said sleeve body (1) includes a coaxially located leading sleeve (11) and a driven sleeve (12), in said leading sleeve (11) a through leading hole (101) is made, in said driven sleeve (12) a through driven hole (103) is made for inserting a fastener, said driven hole (103) is a polygon, between two adjacent faces of the hole of said driven hole (103) a relief groove of the driven hole (104) is made, and in the middle part of the inner wall of said driven hole (103) a buffer groove (2) is made in a wavy shape, the number of faces of the hole of said driven hole (103) is an even number, said two adjacent faces the openings of said driven opening (103) are a flat face of the opening and a face of the opening having said buffer groove (2), respectively.

2. An anti-slip sleeve for mounting and dismounting a fastener according to claim 1, characterized in that said buffer groove (2) includes two internal grooves (21) and an external projection (22) located between the two internal grooves (21), due to which said buffer groove (2) has a W-shaped wavy shape.

3. An anti-slip sleeve for mounting and dismounting a fastener according to paragraph 1, characterized in that said driven hole (103) is a regular polygon.

4. An anti-slip sleeve for mounting and dismounting a fastener according to paragraph 1, characterized in that said leading hole (101) has a non-cylindrical inner surface, said inner surface of the leading hole (101) is a regular polygon, and a relief groove of the leading hole (102) is made between two adjacent faces of the opening of said leading hole (101).

5. An anti-slip sleeve for mounting and dismounting a fastener according to paragraph 1, characterized in that between said leading hole (101) and said driven hole (103) a coaxially located central ring (105) is formed, ensuring mutual communication between the leading hole (101) and the driven hole (103), the inner diameter of said central ring (105) is smaller than the inner diameter of said driven hole (103).

6. An anti-slip sleeve for mounting and dismounting a fastener according to paragraph 1, characterized in that a knurling (106) is made between said leading sleeve (11) and said driven sleeve (12).

7. An anti-slip sleeve for mounting and dismounting a fastener according to paragraph 1, characterized in that the said outer diameter of the driving sleeve (11) is larger than the said outer diameter of the driven sleeve (12).

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