Six-claw type wrench

Abstract

The invention relates to a six-jaw type wrench which comprises a clamping jaw threaded sleeve and a plurality of radial grooves formed in the peripheral side portion of the clamping jaw threaded sleeve, clamping jaws capable of moving in the radial direction are arranged in the radial grooves, a clamping space is formed among the multiple clamping jaws, and the size of the clamping space is adjustable so that the six-jaw type wrench can be matched with bolts of different sizes or abraded bolts. The device is simple in structure and reasonable in design, the conical thread outer sleeve is rotated, under the cooperation of the inner inclined face of the conical thread outer sleeve and the outer inclined face of the clamping jaw, the clamping jaw moves in the radial direction, the size of the clamping space is changed, therefore, a bolt is clamped, the size of the jaw is adjusted, a hexagon bolt can be clamped, and a bolt which becomes a round corner due to abrasion can also be clamped; the device can adapt to installation of bolts of different sizes or damaged bolts, and is convenient and fast.

Description

Technical Field

[0001] The invention relates to a six-claw type wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners such as bolts or nuts. When there are many specifications of nuts and bolts in daily life and production, dozens of sockets or wrenches are required, which are inconvenient to carry and difficult to replace. In actual work, nuts and bolts are rounded due to wear, which makes it impossible for ordinary wrenches to clamp and bear force. Summary of the invention

[0003] The present invention improves the above-mentioned problem, that is, the technical problem to be solved by the present invention is to provide a six-claw wrench with a simple structure and convenient use.

[0004] The present invention is constructed as follows: it includes a clamping jaw threaded sleeve and a plurality of radial grooves arranged on the circumferential side of the clamping jaw threaded sleeve, wherein radially movable clamping jaws are arranged in the radial grooves, and a clamping space is formed between the plurality of clamping jaws. The size of the clamping space is adjustable to accommodate bolts of different sizes or worn bolts.

[0005] Furthermore, a core shaft is arranged in the middle of the lower inner cavity of the clamping jaw threaded sleeve, and clamping springs are arranged between the core shaft and each clamping jaw.

[0006] Furthermore, a conical threaded outer sleeve is arranged above the threaded sleeve of the clamping jaw, and a conical hole is arranged in the lower middle of the conical threaded outer sleeve. The width of the conical hole decreases from bottom to top. The inner wall of the conical hole cooperates with the inclined surface arranged on the outer side of the upper part of the clamping jaw to drive the clamping jaw to move radially to change the size of the clamping space.

[0007] Furthermore, the upper part of the clamping jaw threaded sleeve is an external threaded part, and an internal threaded hole is arranged in the middle of the upper part of the conical threaded outer sleeve, the internal threaded hole is connected with the tapered hole, and an internal threaded part is arranged on the inner wall of the internal threaded hole, and the internal threaded part is threadedly matched with the external threaded part.

[0008] Furthermore, a sliding block is provided on the inner wall of the radial groove, and sliding grooves for matching with the sliding block are provided on both sides of the clamping jaw.

[0009] Furthermore, the clamping jaw is L-shaped, a clamping portion is provided on the inner side of the clamping jaw, and the inner side surface of the clamping portion is a rough surface.

[0010] Furthermore, a striped portion is provided on the outside of the tapered thread outer sleeve.

[0011] Furthermore, a working method of a six-jaw wrench includes the following steps: (1) aligning the clamping space of multiple jaws with the bolt; (2) by rotating the tapered thread outer sleeve, the inner inclined surface of the tapered thread outer sleeve cooperates with the outer inclined surface of the jaws to move the jaws radially to change the size of the clamping space, thereby clamping the bolt; (3) rotating the plate head to remove the bolt.

[0012] Furthermore, when disassembling small bolts, by rotating the tapered threaded outer sleeve downward, the clamping spring is compressed under the cooperation of the inner inclined surface of the tapered threaded outer sleeve and the outer inclined surface of the clamping jaw, and the clamping jaw moves radially inward, thereby reducing the clamping range of the clamping space.

[0013] Furthermore, when disassembling and assembling small bolts, by rotating the tapered threaded outer sleeve upward, the clamping jaws move radially outward under the cooperation of the inner inclined surface of the tapered threaded outer sleeve and the outer inclined surface of the clamping jaws, and under the elastic force of the clamping spring, thereby expanding the clamping range of the clamping space.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the device has a simple structure and is easy to use. The clamping spaces of multiple jaws are aligned with the bolts; the tapered threaded outer sleeve is rotated, and the inner bevel of the tapered threaded outer sleeve cooperates with the outer bevel of the jaws to move the jaws radially, thereby changing the size of the clamping space and clamping the bolts. The size of the jaws can be adjusted to accommodate the installation of bolts of different sizes, and can clamp hexagonal bolts as well as bolts that have become rounded due to wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 It is an exploded view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the clamping jaws according to an embodiment of the present invention; Figure 4 A cross-sectional view of a tapered threaded outer sleeve according to an embodiment of the present invention; Figure 5 A three-dimensional diagram of a tapered threaded outer sleeve according to an embodiment of the present invention; Figure 6 Schematic diagram of the structure of the clamping jaw threaded sleeve according to the embodiment of the present invention Figure 1 ; Figure 7 BB is a cross-sectional view of a clamping jaw threaded sleeve according to an embodiment of the present invention; Figure 8 Schematic diagram of the structure of the clamping jaw threaded sleeve according to the embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example: Figures 1 to 8 As shown, in this embodiment, a six-jaw wrench is provided, including a jaw threaded sleeve 1 and six radial grooves 101 arranged on the circumferential side of the jaw threaded sleeve, each radial groove is provided with a radially movable jaw 2, and a clamping space 201 is formed between the six jaws, and the size of the clamping space is adjustable to adapt to bolts of different sizes or worn bolts.

[0018] In the embodiment of the present invention, a core shaft 3 is arranged in the middle of the lower inner cavity of the clamping jaw threaded sleeve, and clamping springs 4 are respectively arranged between the core shaft and each clamping jaw; the clamping spring is used to provide elastic force to the clamping jaw to enable it to reset better.

[0019] The lower part of the above-mentioned core shaft is a hexagon, and the upper part is a square. Each of the six faces of the hexagon is provided with a mounting hole, and the clamping spring is installed between each mounting hole and the corresponding clamping jaw; the square is fixed to the clamping jaw threaded sleeve, and the square is matched with the square hole set in the clamping jaw threaded sleeve and connected with a pin.

[0020] In an embodiment of the present invention, a conical threaded outer sleeve 5 is arranged above the threaded sleeve of the clamping jaw, and a conical hole 501 is arranged in the middle and lower part of the conical threaded outer sleeve. The width of the conical hole decreases from bottom to top. The inner wall of the conical hole cooperates with the inclined surface 202 arranged on the outer side of the upper part of the clamping jaw 2 to drive the clamping jaw to move radially along the direction of the slider and the sliding groove to change the size of the clamping space.

[0021] When the jaw threaded sleeve moves downward, the inclined surface of the jaw threaded sleeve increases from top to bottom, and the inclined surface of the jaw threaded sleeve cooperates with the inclined surface of the jaw, pushing the jaw to move radially inward; when the jaw threaded sleeve moves upward, the inclined surface of the jaw threaded sleeve increases from top to bottom, and the inclined surface of the jaw threaded sleeve cooperates with the inclined surface of the jaw, and at the same time, under the elastic force of the clamping spring of the jaw, the jaw moves radially outward.

[0022] In the embodiment of the present invention, the upper part of the clamping threaded sleeve 1 is an external threaded portion 102, and an internal threaded hole 502 is arranged in the middle of the upper part of the conical threaded outer sleeve 5. The internal threaded hole is connected to the conical hole. The through hole formed by the internal threaded hole and the conical hole passes through the conical threaded outer sleeve. The inner wall of the internal threaded hole is provided with an internal threaded portion, and the internal threaded portion is threadedly matched with the external threaded portion.

[0023] In the embodiment of the present invention, in order to improve the movement stability and position limiting of the clamping jaws, a slider 103 is provided on the inner wall of the radial groove, and sliding grooves 203 for matching with the slider are provided on both sides of the clamping jaws 2.

[0024] In the embodiment of the present invention, the clamping jaw is L-shaped, and a clamping portion 204 is provided on the inner side of the clamping jaw. The inner side surface of the clamping portion is a rough surface 205; the rough surface may be wavy.

[0025] In the embodiment of the present invention, a striped portion 504 is disposed on the outside of the tapered thread outer sleeve.

[0026] In the embodiment of the present invention, when working: (1) align the clamping space of multiple jaws with the bolt; (2) by rotating the tapered threaded outer sleeve, the inner inclined surface of the tapered threaded outer sleeve and the outer inclined surface of the jaws are coordinated to move the jaws radially to change the size of the clamping space, thereby clamping the bolt; (3) rotate the plate head to remove the bolt.

[0027] When disassembling small bolts, the tapered thread outer sleeve is rotated downward, and the spring is compressed under the cooperation of the inner inclined surface of the tapered thread outer sleeve and the outer inclined surface of the clamping jaw, so that the clamping jaw moves radially inward, thereby reducing the clamping range of the clamping space.

[0028] When disassembling and assembling small bolts, by rotating the tapered thread outer sleeve upward, the clamping jaws move radially outward under the cooperation of the inner inclined surface of the tapered thread outer sleeve and the outer inclined surface of the clamping jaws, and under the elastic force of the clamping spring, thereby expanding the clamping range of the clamping space.

[0029] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0030] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0031] At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0032] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0033] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A six-claw wrench, characterized in that: It includes a clamping jaw threaded sleeve and a plurality of radial grooves arranged on the peripheral side of the clamping jaw threaded sleeve, wherein radially movable clamping jaws are arranged in the radial grooves, and a clamping space is formed between the plurality of clamping jaws. The size of the clamping space is adjustable to adapt to bolts of different sizes or worn bolts.

2. A six-jaw wrench according to claim 1, characterized in that: A core shaft is arranged in the middle of the lower inner cavity of the clamping jaw threaded sleeve, and clamping springs are arranged between the core shaft and each clamping jaw.

3. A six-jaw wrench according to claim 2, characterized in that: A conical threaded outer sleeve is arranged above the threaded sleeve of the clamping jaw, and a conical hole is arranged in the middle and lower part of the conical threaded outer sleeve. The width of the conical hole decreases from bottom to top. The inner wall of the conical hole cooperates with the inclined surface arranged on the outer side of the upper part of the clamping jaw to drive the clamping jaw to move radially to change the size of the clamping space.

4. A six-jaw wrench according to claim 3, characterized in that: The upper part of the clamping jaw threaded sleeve is an external threaded part, and an internal threaded hole is arranged in the middle of the upper part of the conical threaded outer sleeve. The internal threaded hole is connected with the conical hole, and an internal threaded part is arranged on the inner wall of the internal threaded hole, and the internal threaded part is threadedly matched with the external threaded part.

5. A six-jaw wrench according to claim 1, characterized in that: The inner wall of the radial groove is provided with a sliding block, and both sides of the clamping jaw are provided with sliding grooves for matching with the sliding block.

6. A six-jaw wrench according to claim 1, characterized in that: The clamping jaw is L-shaped, and a clamping portion is arranged on the inner side of the clamping jaw, and the inner side surface of the clamping portion is a rough surface.

7. A six-jaw wrench according to claim 3, characterized in that: The outer portion of the conical thread outer sleeve is provided with a stripe portion.

8. A method for operating a six-jaw spanner according to claim 3, characterized in that: The method comprises the following steps: (1) aligning the clamping spaces of the plurality of clamping jaws with the bolt; (2) rotating the tapered thread outer sleeve so that the clamping jaws move radially under the cooperation of the inner inclined surface of the tapered thread outer sleeve and the outer inclined surface of the clamping jaws, thereby changing the size of the clamping space and clamping the bolt; and (3) rotating the plate head to remove the bolt.

9. A method for operating a six-jaw wrench according to claim 8, characterized in that: When disassembling small bolts, the tapered thread outer sleeve is rotated downward, and the clamping spring is compressed under the cooperation of the inner inclined surface of the tapered thread outer sleeve and the outer inclined surface of the clamping jaw, and the clamping jaw moves radially inward, thereby reducing the clamping range of the clamping space.

10. A method for operating a six-jaw wrench according to claim 8, characterized in that: When disassembling and assembling small bolts, by rotating the tapered thread outer sleeve upward, the clamping jaws move radially outward under the cooperation of the inner inclined surface of the tapered thread outer sleeve and the outer inclined surface of the clamping jaws, and under the elastic force of the clamping spring, thereby expanding the clamping range of the clamping space.

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