Adjustable angle planer cutter

Abstract

The utility model relates to the field of medical apparatus and instruments, concretely, it is a kind of adjustable bending angle planer tool, the adjustable bending angle planer tool is by the bending section of sleeve pipe and is composed of outer layer pipe, middle layer pipe and inner layer pipe in turn, so that the planer tool can satisfy the demand of adjusting bending angle in work, and, by setting three layers structure of outer layer pipe, middle layer pipe and inner layer pipe can guarantee the strength of sleeve pipe, specifically, by trapezoidal cutting groove realizes the effect of dispersing pressure, and by setting the direction of the spiral groove of outer layer pipe and middle layer pipe opposite, cutting force can be cancelled on two pipe bodies, reduce local stress concentration, so, adjustable bending angle planer tool can effectively improve the strength of planer tool while ensuring the flexibility of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a planer with an adjustable bending angle. Background Technology

[0002] Traditional planer blades have a straight, rigid tube body, making it difficult to adjust the bending angle. To address this issue, some existing technologies have attempted to incorporate a bendable structure into the tube body. However, in practical applications, these existing bend structures have failed to adequately balance the cutting force distribution while simultaneously enabling angle adjustment. Utility Model Content

[0003] The purpose of this invention is to provide a planer blade with an adjustable bending angle, which can effectively improve the strength of the planer blade while ensuring operational flexibility.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A handle assembly, including a grip housing and a drive unit disposed within the grip housing;

[0006] A working head assembly includes a docking housing that mates with the gripping housing and a cutting tool mounted on the docking housing;

[0007] The cutting tool includes a tube body that docks with the driving component and a cutting head disposed on the end of the tube body away from the driving component. A window is provided on the end of the cutting tool away from the docking housing. The tube body has a straight segment that docks with the docking housing and a bent segment formed by bending and extending from the straight segment. The cutting head and the window are disposed on the free end of the bent segment. The bent segment of the tube body includes an outer tube, a middle tube, and an inner tube that are sequentially nested together. The outer tube, the middle tube, and the inner tube are welded together. Spiral grooves are formed on the inner and outer surfaces of the outer tube and the inner and outer surfaces of the middle tube. Spiral trapezoidal cutting grooves are formed on the inner and outer surfaces of the inner tube. The rotation direction of the spiral grooves formed on the outer tube is opposite to the direction of the spiral grooves formed on the middle tube.

[0008] Furthermore, the trapezoidal cut groove on the inner surface of the inner tube is filled with a flexible filler material.

[0009] Furthermore, the width of the trapezoidal cutting groove is 0.05-0.09 mm.

[0010] Furthermore, the distance between two adjacent trapezoidal cutting grooves is 1.5 mm.

[0011] Furthermore, the inclination angle of the trapezoidal cutting groove is 77°-83°.

[0012] Furthermore, the inclination angle of the spiral groove formed on the outer tube ranges from 82° to 88°.

[0013] Furthermore, the inclination angle of the spiral groove formed on the middle layer tube ranges from 81° to 87°.

[0014] Furthermore, the width of the spiral groove is 0.04 mm.

[0015] Furthermore, the spacing between adjacent spiral grooves formed on the outer tube is 1 mm; the spacing between adjacent spiral grooves formed on the middle tube is 1 mm.

[0016] Furthermore, the driving component is a motor.

[0017] The beneficial effects of this utility model are as follows: the bending section of the tube body is composed of an outer tube, a middle tube, and an inner tube arranged in sequence, which allows the planer to meet the needs of adjusting the bending angle during operation. Furthermore, the three-layer structure of the outer tube, middle tube, and inner tube ensures the strength of the tube body. Specifically, the trapezoidal cutting groove disperses the pressure, and by setting the spiral grooves of the outer tube and the middle tube in opposite directions, the cutting force can be canceled out on the two tube bodies, reducing local stress concentration. Therefore, the planer with adjustable bending angle can effectively improve the strength of the planer while ensuring operational flexibility.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a partial structural diagram of a planer blade with an adjustable bending angle, as shown in an embodiment of this application.

[0020] Figure 2 for Figure 1 A cross-sectional view of a planer blade with an adjustable bending angle is shown.

[0021] Figure 3 for Figure 1 A schematic diagram of the outer tube structure;

[0022] Figure 4 for Figure 1 A schematic diagram of the middle layer tube in the middle layer;

[0023] Figure 5 for Figure 1 A schematic diagram of the inner tube structure. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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, and 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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Please see Figures 1 to 5 An embodiment of this application shows an adjustable bending angle planer comprising a handle assembly (not shown) and a working head assembly. The handle assembly includes a grip housing and a drive unit disposed within the grip housing. The drive unit is a motor. The working head assembly includes a docking housing 10 that abuts against the grip housing and a cutting tool 20 mounted on the docking housing 10. Typically, an outer sleeve may also be provided, which is mounted on the docking housing 10 and covers the cutting tool 20. During planer operation, the outer sleeve does not rotate, and the cutting tool 20 is driven to rotate within the outer sleeve by the drive unit to achieve the planing function. The assembly method between the docking housing and the grip housing can employ existing structures, which will not be described in detail here.

[0029] The cutting tool 20 includes a tube 21 that docks with the drive member and a cutting head 22 disposed in the tube 21 at an end away from the drive member. The docking structure between the tube 21 and the drive member adopts prior art. A window 23 is provided on the end of the cutting tool 20 away from the docking housing 10. The tube 21 has a straight segment 211 that docks with the docking housing 10 and a bent segment 212 formed by bending and extending from the straight segment 211. The cutting head 22 and the window 23 are disposed at the free end of the bent segment 212, wherein the window 23 is closer to the docking housing 10 than the cutting head 22. The bent section 212 of the tube body 21 includes an outer tube 213, a middle tube 214, and an inner tube 215 sequentially nested together. The outer tube 213, the middle tube 214, and the inner tube 215 are welded together. Spiral grooves 216 are formed on the inner and outer surfaces of the outer tube 213 and the inner and outer surfaces of the middle tube 214. Spiral trapezoidal cutting grooves 217 are formed on the inner and outer surfaces of the inner tube 215. The rotation direction of the spiral grooves 216 formed on the outer tube 213 is opposite to the direction of the spiral grooves 216 formed on the middle tube 214.

[0030] This application utilizes a bend section 212 of the tube body 21, which is composed of an outer tube 213, a middle tube 214, and an inner tube 215 arranged sequentially. This allows the planer to meet the needs of adjusting the bending angle during operation. Furthermore, the three-layer structure of the outer tube 213, middle tube 214, and inner tube 215 ensures the strength of the tube body 21. Specifically, the trapezoidal cutting groove 217 disperses pressure, and the spiral grooves 216 of the outer tube 213 and the middle tube 214 are arranged in opposite directions, allowing the cutting force to cancel each other out on the two tube bodies 21, reducing local stress concentration. Therefore, the planer with an adjustable bending angle can effectively improve the strength of the planer while ensuring operational flexibility.

[0031] In this embodiment, the trapezoidal cutting groove 217 on the inner surface of the inner tube 215 is filled with a flexible filler material, specifically: the flexible filler material is medical-grade silicone, such as polyurethane elastomer, polytetrafluoroethylene, medical-grade rubber, etc. Filling with the flexible filler material prevents the cut material from entering the trapezoidal cutting groove 217 during the flow of the liquid after cutting, thus preventing the accumulation of cut material in the trapezoidal cutting groove 217, thereby maintaining the continuous and efficient operation of the planer and avoiding performance degradation caused by blockage in the trapezoidal cutting groove 217. Simultaneously, filling the trapezoidal cutting groove 217 with the flexible filler material optimizes the flow path of the liquid around the tool 20, allowing the cut material to be quickly discharged from the surgical area, reducing the time it stays at the surgical site. Moreover, because the flexible filler material is elastic, it can absorb the impact force generated by friction or vibration during cutting, preventing tool 20 deviation caused by high-frequency vibration, and improving the overall stability and accuracy of the cutting operation.

[0032] To further reduce the risk of cutting material adhesion and clogging, an anti-stick coating or nano-coating can be applied to the inner surface of the inner tube 215. The materials used for the anti-stick coating or nano-coating can be polytetrafluoroethylene, silane nanomaterials, etc.

[0033] In this embodiment, the straight segment 211 in the tube body 21 and the inner tube 215 form a single tube body 21 with an integrated structure. The outer tube 213 and the middle tube 214 are welded to the outside of the inner tube 215. In practical applications, the width of the trapezoidal cutting groove 217 is set to 0.05-0.09 mm, the distance between two adjacent trapezoidal cutting grooves 217 is 1.5 mm, and the inclination angle of the trapezoidal cutting groove 217 is 77°-83°. The inclination angle range of the spiral groove 216 formed on the outer tube 213 is 82°-88°, and the inclination angle range of the spiral groove 216 formed on the middle tube 214 is 81°-87°. The width of the spiral groove 216 is 0.04 mm. The distance between adjacent spiral grooves 216 formed on the outer tube 213 is 1 mm, and the distance between adjacent spiral grooves 216 formed on the middle tube 214 is 1 mm.

[0034] In the above embodiments, by setting and limiting the width of the trapezoidal cutting groove 217 and the spiral groove 216, the effective transmission of cutting force during the cutting process is ensured, the stability of the cutting operation is improved, and the service life is further increased. Setting the inclination angle of the trapezoidal cutting groove 217 and the spiral groove 216 helps to enhance the stable transmission of cutting force. Setting the width of the trapezoidal cutting groove 217 and the spiral groove 216 makes the force distribution during the cutting process more balanced, avoiding uneven cutting or jamming caused by excessively large or small groove spacing.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A planer blade with an adjustable bending angle, characterized in that, include: A handle assembly, including a grip housing and a drive unit disposed within the grip housing; A working head assembly includes a docking housing that mates with the gripping housing and a cutting tool mounted on the docking housing; The cutting tool includes a tube body that docks with the driving component and a cutting head disposed on the end of the tube body away from the driving component. A window is provided on the end of the cutting tool away from the docking housing. The tube body has a straight segment that docks with the docking housing and a bent segment formed by bending and extending from the straight segment. The cutting head and the window are disposed on the free end of the bent segment. The bent segment of the tube body includes an outer tube, a middle tube, and an inner tube that are sequentially nested together. The outer tube, the middle tube, and the inner tube are welded together. Spiral grooves are formed on the inner and outer surfaces of the outer tube and the inner and outer surfaces of the middle tube. Spiral trapezoidal cutting grooves are formed on the inner and outer surfaces of the inner tube. The rotation direction of the spiral grooves formed on the outer tube is opposite to the direction of the spiral grooves formed on the middle tube.

2. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The trapezoidal cut groove on the inner surface of the inner tube is filled with a flexible filler material.

3. The planer blade with adjustable bending angle as described in claim 2, characterized in that, The width of the trapezoidal cutting groove is 0.05-0.09 mm.

4. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The distance between two adjacent trapezoidal cutting grooves is 1.5 mm.

5. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The inclination angle of the trapezoidal cutting groove is 77°-83°.

6. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The inclination angle of the spiral groove formed on the outer tube ranges from 82° to 88°.

7. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The inclination angle of the spiral groove formed on the middle layer tube ranges from 81° to 87°.

8. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The width of the spiral groove is 0.04 mm.

9. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The spacing between adjacent spiral grooves formed on the outer tube is 1 mm; the spacing between adjacent spiral grooves formed on the middle tube is 1 mm.

10. The planer blade with adjustable bending angle as described in claim 1, characterized in that, The driving component is a motor.

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