Rotary grinding assembly and rotary grinding device
By using spiral connections and reinforcement measures, the problem of unstable connection between the gyratory head and the flexible shaft was solved, enabling efficient and reliable gyratory operation and improving grinding accuracy and safety.
Patent Information
- Application Number
- CN202422456721.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-11
AI Technical Summary
In the prior art, the connection between the laparotomy tool head and the flexible shaft is unstable and easily cracked due to impact load, resulting in low production efficiency.
The spiral connection method is adopted so that the stepped hole of the shaving head abuts against the outer sleeve of the flexible shaft, and the spiral wires and spiral grooves are fitted one-to-one to achieve a stable connection between the shaving head and the flexible shaft. It can also be reinforced by spot welding or glue application.
It improves the connection stability and production efficiency between the gyratory head and the flexible shaft, ensures high coaxiality, and enhances the accuracy and safety of patch grinding.
Smart Images
Figure CN223453288U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment technical field especially, relate to a kind of rotary grinding assembly and rotary grinding device. BACKGROUND
[0002] Many patients form plaque by fat, fiber, calcium deposition on the vessel wall, hinder the normal circulation of blood, leading to vascular obstruction.
[0003] In the related art, the rotary grinding cutter head is usually driven to rotate by a flexible shaft to grind plaque. The flexible shaft is generally welded with a bridge member, and the flexible shaft and the rotary grinding cutter head are welded together through the bridge member. The production efficiency is low, and the connection between the rotary grinding cutter head and the bridge member may be cracked due to impact load under high-speed rotation of the flexible shaft. SUMMARY
[0004] One object of the present utility model is to provide a rotary grinding assembly with stable and reliable connection between the rotary grinding cutter head and the flexible shaft, and high production efficiency.
[0005] To achieve this object, the utility model adopts the following technical solutions:
[0006] A rotary grinding assembly is provided, comprising:
[0007] A rotary grinding cutter head is provided with a stepped hole, and a plurality of spiral grooves are arranged in the large end of the stepped hole.
[0008] A flexible shaft includes an outer sleeve, the outer sleeve includes a plurality of spiral wires, a central passage is formed between the plurality of spiral wires, the spiral wires are arranged one by one corresponding to the spiral grooves, the outer sleeve is arranged in the large end of the stepped hole and abuts against the stepped surface of the stepped hole, and the spiral wires are fitted with the groove walls of the corresponding spiral grooves.
[0009] Optionally, the end of the small end of the stepped hole opposite to the large end is provided with a transition surface.
[0010] Optionally, the rotary grinding cutter head includes a cutter head body, and a wear-resistant coating is coated on the cutter head body.
[0011] Optionally, the material of the cutter head body is metal material.
[0012] And / or the material of the wear-resistant coating is diamond.
[0013] Optionally, the granularity of the wear-resistant coating is 15 μm-50 μm.
[0014] Optionally, the number of spiral wires ranges from 8 to 16.
[0015] Optionally, the wire diameter of the spiral wire is 0.1 mm-0.2 mm.
[0016] and / or the outer diameter of the soft shaft is 0.5mm-1mm.
[0017] Optionally, the shape of the rotary grinding head is ellipsoidal, spherical or cylindrical.
[0018] Optionally, the soft shaft further comprises at least one inner layer sleeve arranged in the central channel.
[0019] Another purpose of the utility model provides a rotary grinding assembly, including handle and above-mentioned any one rotary grinding assembly, the handle with the soft shaft of rotary grinding assembly is connected, the handle is used for driving the rotation of the soft shaft.
[0020] The utility model has the advantages of:
[0021] The rotary grinding assembly provided by the utility model has the outer layer sleeve of the soft shaft arranged in the large end of the stepped hole of the rotary grinding head and abutting against the stepped surface of the stepped hole, and the spiral wire and the groove wall of the spiral groove are one-to-one corresponding and attached, so that the connection between the rotary grinding head and the soft shaft is stable and reliable, has high production efficiency. In addition, the spiral connection can make the soft shaft and the rotary grinding head have high coaxiality, which is more beneficial to the positioning and grinding of plaques and has high grinding precision.
[0022] The rotary grinding device provided by the utility model has stable and reliable connection between the soft shaft and the rotary grinding head, and effectively reduces the surgical risk. BRIEF DESCRIPTION OF DRAWINGS
[0023] Fig. 1 is the structural schematic view of the rotary grinding assembly provided by the utility model;
[0024] Fig. 2 is the sectional view of the rotary grinding head provided by the utility model;
[0025] Fig. 3 is the sectional view of the soft shaft provided by the utility model.
[0026] In the drawings:
[0027] 100, rotary grinding head; 110, stepped hole; 111, stepped surface; 112, transition surface; 120, spiral groove;
[0028] 200, soft shaft; 210, outer layer sleeve; 220, spiral wire. DETAILED DESCRIPTION
[0029] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0032] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0033] Reference Figs. 1 to 3As shown, the embodiment provides a rotary grinding assembly, which comprises a rotary grinding head 100 and a flexible shaft 200. The rotary grinding head 100 is provided with a stepped hole 110, and a plurality of spiral grooves 120 are arranged in the large end of the stepped hole 110. The flexible shaft 200 comprises an outer sleeve 210, and the outer sleeve 210 comprises a plurality of spiral wires 220. The spiral wires 220 are arranged one by one corresponding to the spiral grooves 120, and the outer sleeve 210 is arranged in the large end of the stepped hole 110 and abuts against the stepped surface 111 of the stepped hole 110. It can be understood that the outer sleeve 210 is formed by the spiral wires 220 being arranged side by side.
[0034] In the embodiment, the outer sleeve 210 of the flexible shaft 200 is arranged in the large end of the stepped hole 110 of the rotary grinding head 100 and abuts against the stepped surface 111 of the stepped hole 110, and the spiral wires 220 abut against the groove walls of the spiral grooves 120 one by one, so as to realize the connection between the rotary grinding head 100 and the flexible shaft 200, which is stable and reliable. The connection between the rotary grinding head 100 and the flexible shaft 200 does not need the bridging intervention of a bridging piece, and has high production efficiency. In addition, the spiral connection can make the flexible shaft 200 and the rotary grinding head 100 have high coaxiality, which is more beneficial to the positioning and grinding of plaques and has high grinding precision.
[0035] It can be understood that, when the rotary grinding assembly is in operation, the rotary grinding head 100 is rotated by the flexible shaft 200 in the same direction as the spiral grooves 120. The static friction force between the spiral wires 220 and the groove walls of the spiral grooves 120 and the locking force in the movement process can enhance the reliability of the connection between the rotary grinding head 100 and the flexible shaft 200 during operation, and effectively prevent the connection between the rotary grinding head 100 and the flexible shaft 200 from loosening.
[0036] Exemplarily, in order to ensure that the connection between the flexible shaft 200 and the rotary grinding head 100 is more stable and reliable, the flexible shaft 200 and the rotary grinding head 100 can also be connected by spot welding or point gluing. The rotary grinding head 100 and the flexible shaft 200 connected by spot welding can also rotate and grind plaques in two directions.
[0037] Exemplarily, the number of spiral wires 220 ranges from 8 to 16, for example, 10 or 12, so that the outer sleeve 210 has good torque transmission performance and carrying capacity.
[0038] Exemplarily, the material of the spiral wires 220 includes but is not limited to stainless steel, for example, 316L stainless steel, which has excellent corrosion resistance and excellent welding performance.
[0039] Exemplarily, the wire diameter of the helical wire 220 is 0.1mm-0.2mm, for example, 0.12mm, 0.13mm, 0.135mm, 0.15mm or 0.16mm, so that the outer sleeve 210 has good torque transmission performance and load capacity.
[0040] Exemplarily, the outer diameter of the flexible shaft 200 is 0.5mm-1mm, for example, 0.6mm, 0.7mm or 0.8mm, so that the flexible shaft 200 has good torque transmission performance and load capacity.
[0041] In a feasible implementation, the flexible shaft 200 further comprises at least one inner sleeve (not shown) arranged in the central channel, so that the flexible shaft 200 has good torque transmission performance and load capacity, and can effectively prevent the flexible shaft 200 from breaking, safe and reliable. The inner sleeve can be made of fine wires. The material of the fine wires can be the same as that of the helical wire 220. Alternatively, when the flexible shaft 200 comprises one inner sleeve, the rotation direction of the fine wires can be opposite to that of the helical wire 220. Alternatively, when the flexible shaft 200 comprises two or more inner sleeves, the rotation direction of the fine wires of at least part of the inner sleeves is opposite to that of the helical wire 220.
[0042] In a feasible implementation, the rotational atherectomy head 100 comprises a head body, and a wear-resistant coating is coated on the head body, wherein the hardness and strength of the wear-resistant coating are greater than those of the head body, and the rotational atherectomy head 100 maintains the shape of the wear-resistant coating through the head body, so that the inner membrane coating is suitable for grinding plaque, and the wear-resistant coating has good grinding effect. Alternatively, the wear-resistant coating is coated on the end of the head body away from the flexible shaft 200, and the coating can coat 1 / 2-1 / 3 of the outer surface of the head body. Of course, the outer surface of the head body can also be completely covered by the wear-resistant coating.
[0043] Exemplarily, the material of the head body can be metal, for example, 304 stainless steel, 304V stainless steel or 316L stainless steel, which has good corrosion resistance, high strength and toughness.
[0044] Exemplarily, the material of the wear-resistant coating can be diamond, which has high hardness and wear resistance, and can provide good grinding effect.
[0045] Alternatively, the granularity of the wear-resistant coating is 15μm-50μm, for example, 18μm, 20μm or 25μm, so as to ensure that the wear-resistant coating has good grinding effect on plaque.
[0046] Alternatively, the height of the key burr of the wear-resistant coating is about 3μm-8μm, for example, 5μm or 6μm, so as to ensure that the wear-resistant coating has good grinding effect on plaque.
[0047] Exemplarily, the shape of the rotary grinding head 100 includes but is not limited to an ellipsoidal shape, a spherical shape or a cylindrical shape. Among them, the rotary grinding head 100 in an ellipsoidal shape can be rotated and guided conveniently, the rotary grinding head 100 in a spherical shape has the best guiding performance, and the rotary grinding head 100 in a cylindrical shape has the best grinding efficiency. During the operation, the rotary grinding head 100 can be selected according to the actual clinical needs.
[0048] In a feasible implementation, the end of the small end of the stepped hole 110 opposite to the end of the large end is provided with a transition surface 112, which optionally includes but is not limited to a chamfer surface or a fillet surface. During the operation, a guide wire (not shown) is first passed through the plaque in the blood vessel, and then the soft shaft 200 is sleeved on the guide wire through the central passage. Under the guidance of the guide wire, the rotary grinding head 100 is moved to the plaque in the blood vessel for grinding. The provision of the transition surface 112 can reduce the mechanical wear between the rotary grinding head 100 and the guide wire when the rotary grinding head 100 rotates at a high speed.
[0049] The embodiment also provides a rotary grinding device, which comprises a handle (not shown) and the rotary grinding assembly described above. The handle is connected with the soft shaft 200 of the rotary grinding assembly, and the handle is used to drive the soft shaft 200 to rotate.
[0050] Specifically, the handle is internally provided with a driving motor and a transmission assembly connected with the driving motor. The transmission assembly is connected with the soft shaft 200, and the driving motor drives the soft shaft 200 to rotate through the transmission assembly. The transmission assembly includes but is not limited to a gear meshing structure or a turbine worm structure, and the transmission assembly is prior art and is not the focus of the protection of the present application, which will not be described here. The transmission assembly is detachably connected with the soft shaft 200.
[0051] Specifically, the handle is further provided with a guide wire channel (not shown) in communication with the central passage. The guide wire can be passed through the central passage and the stepped hole 110 through the guide wire channel, so as to realize the guidance of the guide wire to the rotary grinding head 100.
[0052] Specifically, the handle is connected with an outer catheter (not shown), and the soft shaft 200 is arranged in the outer catheter. The handle can be provided with a suction interface in communication with the outer catheter. The suction interface is used to connect a suction device (not shown), and the suction device can be used to suck the ground plaque out of the human body through the suction interface, which is safe and reliable.
[0053] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.
Claims
1. A rotational atherectomy assembly, characterized in that: The application relates to a rotary grinding tool head (100) provided with a stepped hole (110), wherein a plurality of spiral grooves (120) are arranged in the large end of the stepped hole (110); and a flexible shaft (200) comprising an outer sleeve (210) provided with a plurality of spiral wires (220) and a central channel formed between the spiral wires (220), wherein the spiral wires (220) are arranged one by one in correspondence with the spiral grooves (120), the outer sleeve (210) is arranged in the large end of the stepped hole (110) and abuts against the stepped surface (111) of the stepped hole (110), and the spiral wires (220) are in close contact with the groove walls of the corresponding spiral grooves (120). The small end of the stepped hole (110) is provided with a transition surface (112) opposite to the end of the large end. The rotary grinding tool head (100) comprises a tool head body, and a wear-resistant coating is arranged on the tool head body.
2. The rotational atherectomy device of claim 1 wherein, The material of the tool head body is metal.
3. The rotational atherectomy device of claim 1 wherein: The material of the wear-resistant coating is diamond.
4. The rotational atherectomy device of claim 3, wherein the abrasive element is formed of a material that is harder than the material of the outer surface of the balloon. The granularity of the wear-resistant coating is 15-50 mu m. The number of the spiral wires (220) ranges from 8 to 16.
5. The rotational atherectomy device of claim 3, wherein the abrasive element has a length of about 2 mm to about 4 mm. The wire diameter of the spiral wires (220) is 0.1-0.2 mm.
6. The rotational atherectomy device of claim 1 wherein, The outer diameter of the flexible shaft (200) is 0.5-1 mm.
7. The rotational atherectomy device of claim 1 wherein the abrasive element has a length of about 1.25 mm to about 2.5 mm. The rotary grinding tool head (100) is in the shape of an ellipsoid, a sphere or a cylinder. The flexible shaft (200) further comprises at least one inner sleeve arranged in the central channel.
8. The rotational atherectomy device of claim 1 wherein, The application further relates to a handle connected with the flexible shaft (200) of the rotary grinding assembly and used for driving the flexible shaft (200) to rotate.
9. The rotational atherectomy device of claim 1 wherein, 10. A rotational atherectomy device, comprising: