Rotary cutting tool

Abstract

The utility model provides a rotary cutting tool which comprises an outer shell, an inner shell and a blade, the inner shell is arranged in an inner cavity of the outer shell in a rotating mode, a rotating shaft penetrating through the inner shell is arranged in the center of the outer shell, the blade is arranged in the inner cavity of the inner shell and arranged on the rotating shaft in a sleeved mode, and the blade is arranged in the inner cavity of the inner shell. One side of the inner shell and one side of the outer shell are each provided with an opening communicating with the inner cavity and the outside. A limiting assembly used for controlling the inner shell to rotate relative to the outer shell is arranged between the inner shell and the outer shell. The outer shell and the inner shell are arranged to surround the blade in the middle, the position of the inner shell relative to the outer shell is controlled through the limiting assembly, and the inner shell is rotated relative to the outer shell to expose the blade when the cutter needs to be used, so that the contact between the blade and the hand can be reduced, the risk of scratching the hand is reduced, and the safety during working is improved.

Description

Technical Field

[0001] The utility model relates to a handheld tool, in particular to a rotary cutting tool. Background Art

[0002] Rotary cutters are generally used to cut layers of glue, cardboard, leather, textiles or other materials, and compared to wire cutters, rotary cutters cut more smoothly, with less effort and higher cutting efficiency. The rotary cutter generally includes a body with a handle connected to the body for a user to grasp, and a generally circular head including a surface to which a generally circular cutting blade is connected.

[0003] However, the rotary cutting tools currently on the market generally have defects, such as: (1) when the rotary cutting tool is not in use, the blade is not protected, which may cause damage to the blade and pose a risk of injury to the operator; (2) the existing grip handles are usually only suitable for one hand, making it impossible for the operator to use both hands, which is time-consuming and laborious. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a rotary cutting tool to solve the problem that the periphery of the rotary cutting tool in the prior art is not protected and the blade is easily damaged and easily hurts people.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a rotary cutting tool, comprising an outer shell, an inner shell and a blade, wherein the inner shell is rotatably arranged in the inner cavity of the outer shell, a rotating shaft penetrating the inner shell is arranged at the center of the outer shell, the blade is arranged in the inner cavity of the inner shell and sleeved on the rotating shaft, and one side of the inner shell and the outer shell are both provided with an opening connecting the inner cavity and the outside;

[0006] A limiting component for controlling the inner shell to rotate relative to the outer shell is provided between the inner shell and the outer shell.

[0007] In one embodiment of the utility model, the limit assembly includes a guide groove, a guide pin and an operating part, the guide groove is opened on the side wall of the outer shell, one end of the guide pin passes through the guide groove and is connected to the inner shell, the operating part is arranged at the other end of the guide pin, and the operating part can be locked with the outer shell.

[0008] In an embodiment of the present invention, the guide pin is a screw rod, and the screw rod is spirally connected to the inner shell.

[0009] In one embodiment of the present invention, at least a portion of the guide pin is an elastic member, and one end of the guide pin is fixedly connected to the inner shell.

[0010] In an embodiment of the present invention, the position limiting assembly further comprises a positioning block, which is mounted on the housing and respectively located at two ends of the guide groove, and the positioning block and the operating portion can be cooperatively connected.

[0011] In one embodiment of the present invention, the positioning block has a certain thickness, and the thickness of the positioning block gradually increases from the end facing the guide groove to the end away from the guide groove, and an interference fit can be formed between the operating portion and the positioning block.

[0012] In an embodiment of the present invention, the positioning block is a magnetic member, and the operating portion can be magnetically connected to the positioning block.

[0013] In one embodiment of the present invention, a handle is provided on the upper portion of the housing, and the number of the handles is two, and the two handles are symmetrically and transversely arranged on the housing.

[0014] In an embodiment of the present invention, a bearing is sleeved on the rotating shaft, and the blade is sleeved on the bearing.

[0015] As described above, the rotary cutting tool of the utility model has the following beneficial effects:

[0016] 1. The utility model surrounds the blade in the middle by setting an outer shell and an inner shell, and controls the position of the inner shell relative to the outer shell by a limit assembly. When it is needed, the inner shell is rotated relative to the outer shell to expose the blade, thereby reducing the contact between the blade and the hand, reducing the risk of scratching the hand, and improving safety during work.

[0017] 2. The utility model has two handles arranged horizontally, so the operator can operate with one hand or two hands as needed, which makes it easier to apply force when tapping rubber, thereby increasing work efficiency; and the handles are arranged on the upper part of the shell, which can be convenient for the operator to take. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the rotary cutting tool disclosed in Example 1 of the utility model is shown in FIG. Figure 1 .

[0019] Figure 2 The structure of the rotary cutting tool disclosed in Example 1 of the utility model is shown in FIG. Figure 2 .

[0020] Figure 3 Schematic diagram of the disassembly of the rotary cutting tool disclosed in Example 1 of the utility model Figure 1 .

[0021] Figure 4 Schematic diagram of the disassembly of the rotary cutting tool disclosed in Example 1 of the utility model Figure 2 .

[0022] Component number description

[0023] 1. Outer shell; 11. Guide groove; 2. Inner shell; 3. Rotating shaft; 4. Blade; 5. Guide pin; 6. Operating part; 7. Positioning block; 8. Handle. DETAILED DESCRIPTION

[0024] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] Example 1

[0026] See also Figures 1 to 4 The utility model provides a rotary cutting tool, comprising an outer shell 1, an inner shell 2 and a blade 4, wherein the inner shell 2 is rotatably arranged in the inner cavity of the outer shell 1, a rotating shaft 3 penetrating the inner shell 2 is arranged at the center of the outer shell 1, and the two-handed blade 4 is usually an annular blade 4, the blade 4 is arranged in the inner cavity of the inner shell 2 and sleeved on the rotating shaft 3, and one side of the inner shell 2 and the outer shell 1 are both provided with openings connecting the inner cavity and the outside; it is worth noting that a limit assembly for controlling the rotation of the inner shell 2 relative to the outer shell 1 is provided between the inner shell 2 and the outer shell 1.

[0027] In the present invention, the inner shell 2 can be controlled to rotate relative to the outer shell 1 by the limiting assembly. Figure 2 When the openings of the two overlap, the inner cavity of the inner shell 2 is connected to the outside, so that the blade 4 is exposed; Figure 1 When the openings of the two do not overlap, the inner cavity of the inner shell 2 cannot communicate with the outside, so that the blade 4 is surrounded on all sides to avoid the risk of the blade 4 being exposed to the outside.

[0028] Specifically, the limit assembly includes a guide groove 11, a guide pin 5 and an operating part 6. The guide groove 11 is opened on the side wall of the outer shell 1. One end of the guide pin 5 passes through the guide groove 11 and is connected to the inner shell 2. The operating part 6 is arranged at the other end of the guide pin 5. The operating part 6 can be locked with the outer shell 1.

[0029] In the present invention, a handle 8 is provided on the upper part of the housing 1, and the number of the handles 8 is two, and the two handles 8 are symmetrical and transversely arranged on the housing 1. Through the two transversely arranged handles 8, the operator can operate with one hand or two hands as needed, which makes it easier to apply force when tapping rubber, thereby increasing work efficiency; and the handle 8 is arranged on the upper part of the housing 1, which can be convenient for the operator to take it easily.

[0030] In the present invention, the rotating shaft 3 is detachably mounted at the center of the outer shell 1. After the stopper assembly and the rotating shaft 3 are disassembled, the inner shell 2 and the outer shell 1 can be separated, so that the blade 4 can be removed and replaced conveniently.

[0031] Furthermore, a bearing is sleeved on the rotating shaft 3, and the blade 4 is sleeved on the bearing, so that the rotation of the blade 4 is more stable and smooth.

[0032] Example 2

[0033] Referring to the figure, this embodiment provides a rotary cutting tool, the technical features provided by the rotary cutting tool include all the technical features disclosed in the embodiment 1, except that:

[0034] In this embodiment, the guide pin 5 is a screw rod, and the screw rod is screwed to the inner shell 2. The operating part 6 is a knob, and by tightening the screw rod with the knob, the knob can press the outer shell 1 and the inner shell 2 tightly to achieve relative fixation of the two.

[0035] When in use, loosen the knob to allow the guide pin 5 to slide freely in the guide groove 11, slide the knob along the groove direction to the other end and tighten it, so that the blade 4 can be exposed and start working. When not in use, loosen the knob, slide the knob along the opposite direction of the groove to one end and tighten it, so that the outer periphery of the blade 4 is protected, and it is not easy to scratch people or objects when it is stationary.

[0036] Example 3

[0037] This embodiment provides a rotary cutting tool, the technical features provided by which include all the technical features disclosed in Embodiment 1, except that:

[0038] In this embodiment, at least a portion of the guide pin 5 is an elastic member, and one end of the guide pin 5 is fixedly connected to the inner shell 2. By pulling the operating portion 6 outward, the guide pin 5 can slide freely in the guide groove 11; by loosening the operating portion 6, the operating portion 6 can press the outer shell 1 and the inner shell 2 to achieve relative fixation of the two.

[0039] Example 4

[0040] This embodiment provides a rotary cutting tool, the technical features provided by which include all the technical features disclosed in Embodiment 1, except that:

[0041] In this embodiment, the limiting assembly further includes a positioning block 7 , which is mounted on the housing 1 and is located at both ends of the guide groove 11 , respectively. The positioning block 7 and the operating portion 6 can be cooperatively connected.

[0042] Specifically, the positioning block 7 has a certain thickness, and the thickness of the positioning block 7 gradually increases from the end facing the guide pin 5 to the end away from the guide pin 5 , and an interference fit can be formed between the operating portion 6 and the positioning block 7 .

[0043] When in use, the operating part 6 is pushed inward to make the operating part 6 lose the clamping fit with the positioning block 7, and the operating part 6 is slid to the other end along the groove direction to connect with the positioning block 7 at the other end, so that the blade 4 is exposed and starts working. When not in use, the operating part 6 is similarly pushed back to the starting end so that the inner shell 2 surrounds the blade 4.

[0044] Example 5

[0045] This embodiment provides a rotary cutting tool, the technical features provided by which include all the technical features disclosed in Embodiment 4, except that:

[0046] In this embodiment, the limiting assembly further includes a positioning block 7 , which is mounted on the housing 1 and is located at both ends of the guide groove 11 , respectively. The positioning block 7 and the operating portion 6 can be cooperatively connected.

[0047] Specifically, the positioning block 7 is a magnetic member, the operating part 6 is a magnetic member or metal iron, and the operating part 6 can be magnetically connected to the positioning block 7. When the operating part 6 slides to both ends, it can be connected to the positioning block 7 to achieve relative fixation of the inner shell 2 and the outer shell 1.

[0048] The utility model surrounds the blade in the middle by setting an outer shell and an inner shell, and controls the position of the inner shell relative to the outer shell by a limit assembly. When it is needed, the inner shell is rotated relative to the outer shell to expose the blade, thereby reducing the contact between the blade and the hand, reducing the risk of scratching the hand, and improving the safety during work. The utility model has two handles arranged horizontally, so that the operator can operate with one hand or two hands as needed, which makes it easier to apply force when tapping rubber, thereby increasing work efficiency; and the handle is arranged on the upper part of the outer shell, which can be convenient for the operator to take. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A rotary cutting tool, characterized in that: The invention comprises an outer shell, an inner shell and a blade, wherein the inner shell is rotatably arranged in the inner cavity of the outer shell, a rotating shaft penetrating the inner shell is arranged at the center of the outer shell, the blade is arranged in the inner cavity of the inner shell and sleeved on the rotating shaft, and one side of the inner shell and the outer shell are both provided with an opening connecting the inner cavity and the outside; A limiting component for controlling the inner shell to rotate relative to the outer shell is provided between the inner shell and the outer shell.

2. A rotary cutting tool according to claim 1, characterized in that: The limit assembly includes a guide groove, a guide pin and an operating part. The guide groove is opened on the side wall of the outer shell. One end of the guide pin passes through the guide groove and is connected to the inner shell. The operating part is arranged at the other end of the guide pin. The operating part can be locked with the outer shell.

3. A rotary cutting tool according to claim 2, characterized in that: The guide pin is a screw rod, and the screw rod is spirally connected to the inner shell.

4. A rotary cutting tool according to claim 2, characterized in that: At least a portion of the guide pin is an elastic member, and one end of the guide pin is fixedly connected to the inner shell.

5. A rotary cutting tool according to claim 2, characterized in that: The limiting assembly further comprises a positioning block, which is mounted on the housing and respectively located at two ends of the guide groove, and the positioning block and the operating portion can be matched and connected.

6. A rotary cutting tool according to claim 5, characterized in that: The positioning block has a certain thickness, and the thickness of the positioning block gradually increases from the end facing the guide groove to the end away from the guide groove, and an interference fit can be formed between the operating portion and the positioning block.

7. A rotary cutting tool according to claim 5, characterized in that: The positioning block is a magnetic piece, and the operating part can be magnetically connected to the positioning block.

8. A rotary cutting tool according to any one of claims 1 to 7, characterized in that: A handle is provided on the upper part of the shell. There are two handles, and the two handles are symmetrical and arranged transversely on the shell.

9. A rotary cutting tool according to any one of claims 1 to 7, characterized in that: A bearing is sleeved on the rotating shaft, and the blade is sleeved on the bearing.

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