A cutter rotating shaft capable of quick disassembly and rotation tightness adjustment

Abstract

The utility model discloses a tool rotating shaft which can realize quick disassembly and rotation tightness adjustment. The tool rotating shaft comprises a female nail, a first sub-nail, a second sub-nail, a shaft hole arranged on a tool head, an avoiding hole arranged on a cover piece, a penetrating hole arranged on a handle, the female nail is provided with a penetrating hole along an axis, an internal thread is arranged in the penetrating hole, one end of the female nail penetrates the avoiding hole and the shaft hole in sequence, the other end of the female nail is provided with a limiting head, the diameter of the limiting head is greater than that of the avoiding hole, the rod body of the first sub-nail and the second sub-nail is provided with an external thread matched with the internal thread. The utility model is composed of one female nail and two sub-nails, the two ends of the female nail are locked into corresponding sub-nails, so that no matter which sub-nail is unscrewed, the other end of the female nail is still connected with the handle, the connection is not directly removed, and the parts are not scattered during disassembly. At the same time, the two sub-nails are screwed in, one is used for fastening the whole tool, and the other is used for adjusting the tightness of the tool head rotation.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a cutting tool shaft that can achieve quick release and rotational tension adjustment. Background Technology

[0002] While knives and other cutting tools certainly pose inherent dangers in their use, they can bring many conveniences to daily life when used properly. One such type is the spring knife, which allows the blade to fold into the handle. It is favored by users for its ease of storage and portability, and is especially suitable for use in the wild. The spring knife is a type of folding knife, which mainly consists of a spring between the blade and the handle. The spring's restoring force pushes the blade out of the handle, achieving a quick and automatic blade extension.

[0003] Currently, existing spring-loaded knives, such as the one disclosed in patent number CN202422571254.0, which discloses a tool for easy maintenance and adjustment of the spring force, only require removing the handle when adjusting the spring force. However, to avoid removing the spindle, the spindle is not connected to the handle, but is directly mounted on a pair of shims. Because the thickness of the knife grip is limited, having both the handle and shims results in very thin shims. Mounting the spindle solely on the shims leads to insufficient strength or, under excessive force, a tendency to wobble. Therefore, to enhance stability, the spindle should be connected to both ends of the handle and the shims. However, this design, because the spindle consists of a female pin and a female pin that is threadedly locked to the female pin, requires disrupting the spindle's stabilizing structure (i.e., the entire spindle must be disassembled) every time the pull rod force is adjusted. After the spindle's stabilizing structure is disassembled, a person needs to manually stabilize the other end of the handle and the female pin to prevent the other handle and female pin from disengaging before the pull rod can be adjusted. Otherwise, due to the shaft locking mechanism, all handles and female pins will disengage, resulting in disassembled parts that need to be reassembled, adding to the operational steps. Furthermore, the spindle's rotation tension can only be adjusted by loosening a single screw; loosening it can easily cause the spindle's own structure to become loose as well, making the adjustment method less than ideal. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tool spindle that can realize quick release and rotational tension adjustment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tool spindle capable of quick release and rotational tension adjustment includes a female pin, a first male pin, a second male pin, a shaft hole on the tool head, a clearance hole on a mask, and a through hole on the handle. The female pin has a through hole along its axis, and an internal thread is provided in the through hole. One end of the female pin passes through the clearance hole and the shaft hole in sequence, and the other end of the female pin is provided with a limiting head. The diameter of the limiting head is larger than that of the clearance hole. The shanks of the first and second male pins are provided with external threads adapted to the internal threads. The heads of the first and second male pins are both larger than the through hole. The bodies of the first and second male pins are both screwed into the through hole through the through hole. The body of the second male pin is screwed in from the end with the limiting head.

[0007] Preferably, a gasket is installed at both ends of the shaft hole, and the surface of the gasket is evenly provided with a ring of semi-circular protrusions.

[0008] Preferably, the through hole is a countersunk hole that can accommodate the nail head.

[0009] Preferably, a slot for accommodating the limiting head is provided at the inner port of the through hole on the same side as the limiting head.

[0010] Because of the above-mentioned solution, this utility model consists of a female nail and two male nails, so that both ends of the female nail are locked with corresponding male nails. Therefore, no matter which male nail is unscrewed, the other end of the female nail is still connected to the handle, and the connection will not be directly removed, thus avoiding disassembly and scattering of parts. At the same time, by screwing in the two male nails, one is responsible for fastening the entire tool, and the other is responsible for adjusting the tightness of the rotation of the tool head. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the cutting tool according to an embodiment of the present utility model.

[0012] Figure 2 This is an exploded view of the overall structure of an embodiment of this utility model.

[0013] Figure 3 This is a schematic diagram of the structure at the shaft hole in an embodiment of the present invention.

[0014] Figure 4 This is a structural cross-sectional view of an embodiment of the present utility model. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0018] like Figures 1 to 4 As shown, this embodiment provides a tool spindle that enables quick release and rotational tension adjustment, including a female pin 1, a first male pin 2, a second male pin 3, a shaft hole 4 on the tool head 101, a clearance hole 5 on the mask 102, and a through hole 6 on the handle 103. The female pin 1 has a through hole 7 along its axis, and an internal thread is provided in the through hole 7. One end of the female pin 1 passes through the clearance hole 5 and the shaft hole 4 in sequence, and the other end of the female pin 1 is provided with a limiting head 8. The diameter of the limiting head 8 is larger than that of the clearance hole 5. The shafts of the first male pin 2 and the second male pin 3 are provided with external threads adapted to the internal threads. The heads of the first male pin 2 and the second male pin 3 are both larger than the through hole 6. The bodies of the first male pin 2 and the second male pin 3 are both screwed into the through hole 6 through the through hole 6. The body of the second male pin 3 is screwed in from the end with the limiting head 8.

[0019] It should be noted that the structure of the cutter head 101, the mask 102, the pull rod spring, and the handle 103 should refer to the structural style of patent number CN202422571254.0. However, this embodiment mainly consists of a female nail 1 and two male nails, so that both ends of the female nail 1 are locked with corresponding male nails. Therefore, no matter which male nail is unscrewed, the other end of the female nail 1 is still connected and the connection will not be directly removed, thus avoiding disassembly of the parts. At the same time, by screwing in the two male nails, one is responsible for fastening the entire cutter, and the other is responsible for adjusting the tightness of the cutter head rotation.

[0020] When specific disassembly is required, simply select the handle 103 that needs to be removed, and then use a tool, such as a screwdriver, to unscrew the corresponding first nail 2 or second nail 3, as well as the fasteners on the handle 103 itself and the cover plate. This way, only the handle 103 at that location can be removed, while the handle 103 at the other location remains locked to the mother nail 1, thus preventing all parts from being disassembled at once and causing unnecessary disassembly and dispersal of parts.

[0021] When it is necessary to adjust the tightness of the blade rotation, this embodiment can simply turn the first nail 2 (or the second nail 3). When turning the first nail 2, the other end is locked by the second nail 3. As the first nail 2 is tightened, it will pull the mask 102 and the blade 101 into a tighter fit. The tighter the fit, the tighter the blade 101 will rotate, and the looser the fit, the looser the blade 101 will rotate.

[0022] Furthermore, to make the cutting head rotate more smoothly, a shim 9 is installed at both ends of the shaft hole 4 in this embodiment. The surface of the shim 9 is evenly provided with a ring of semi-circular protrusions 10. In this way, the semi-circular protrusions 10 can reduce frictional resistance, that is, prevent it from locking up directly after tightening.

[0023] Furthermore, to enhance the aesthetics of the pivot point, the through hole 6 in this embodiment is a countersunk hole that can accommodate the nail head. This way, after the first nail 2 and the second nail 3 are screwed in, the surface will remain free of protrusions, thus improving the appearance.

[0024] Furthermore, in order to reduce the thickness, in this example, a slot 11 is provided at the inner port of the through hole 6 on the same side as the limiting head 8 to accommodate the limiting head 8, so as to accommodate the limiting head 8 and reduce the overall thickness.

[0025] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tool spindle capable of quick release and rotational tension adjustment, characterized in that: The tool includes a female nail, a first female nail, a second female nail, a shaft hole on the cutter head, a clearance hole on the mask, and a through hole on the handle. The female nail has a through hole along its axis, and an internal thread is provided in the through hole. One end of the female nail passes through the clearance hole and the shaft hole in sequence, and the other end of the female nail is provided with a limiting head. The diameter of the limiting head is larger than that of the clearance hole. The shanks of the first and second female nails are provided with external threads that are adapted to the internal threads. The nail heads of the first and second female nails are both larger than the through hole. The nail bodies of the first and second female nails are both screwed into the through hole through the through hole. The nail body of the second female nail is screwed in from the end with the limiting head.

2. A tool spindle as described in claim 1, characterized in that: Gaskets are installed at both ends of the shaft hole, and a semi-circular protrusion is evenly distributed on the surface of the gaskets.

3. A tool spindle capable of quick release and rotational tension adjustment as described in claim 2, characterized in that: The through hole is a countersunk hole that can accommodate the nail head.

4. A tool spindle as described in claim 3, characterized in that: A slot for accommodating the limiting head is provided at the inner port of the through hole located on the same side as the limiting head.

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