A safety ring saw

Abstract

This utility model discloses a safety ring saw, relating to the technical field of medical devices. It includes a grip with a fixing groove that houses the ring saw, which rotates along the grip. The outer wall of the ring saw has evenly distributed mounting grooves, each corresponding to a cutting device. Each cutting device includes a connecting part that passes through the mounting groove and is rotatable along it; a cutting part for cutting bone, fixedly connected to the connecting part; a connecting ring located within and coaxially aligned with the mounting groove, its inner wall having an L-shaped positioning groove containing a positioning block that slides along the groove and is fixedly connected to the connecting part; and a second spring, one end fixed to the ring saw and the other end abutting against the connecting part. This utility model has a reasonable design structure, allowing for quick assembly and disassembly of the cutting part, ensuring the cutting part of the ring saw is in a normal operating state and maintaining cutting accuracy when cutting bone.

Description

Technical Field

[0001] This utility model relates to the technical field of medical equipment, specifically a safety ring saw. Background Technology

[0002] The medical trephine saw is a common orthopedic surgical instrument, mainly used in fracture repair, joint replacement, and bone tumor resection surgeries. The trephine saw is characterized by high cutting precision, ease of operation, high safety, and stable performance, enabling precise cutting of bone, which helps reduce accidental injury and ensures the smooth progress of surgery.

[0003] In existing technology, a trestle typically consists of a small handheld electric motor and a rotating circular saw blade. The saw blade can precisely cut the bone during surgery, while the electric motor provides the rotational power for the saw blade to cut the relevant bone tissue, ultimately facilitating the operator's work.

[0004] In a ring saw, the most important structure is the saw blade. After prolonged use, the edges of the saw blade will wear down. If it is not replaced in time, it will cause some deviation during cutting, thus affecting the cutting accuracy. At the same time, the saw blade is usually a one-piece design. Damage to one cutting unit of the saw blade will render the entire saw blade unusable. Utility Model Content

[0005] 1) Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a safe ring saw.

[0007] (ii) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a safety ring saw, including a gripping part, characterized in that: the gripping part is provided with a fixing groove, the fixing groove contains the ring saw, and the ring saw rotates along the gripping part;

[0009] The outer wall of the ring saw is evenly distributed with several mounting grooves, and a cutting device is provided at each mounting groove. The cutting device includes:

[0010] A connecting part, which passes through the mounting groove and is rotatable along the mounting groove;

[0011] The cutting section is used to cut bone, and the cutting section and the connecting section are fixedly connected.

[0012] A connecting ring is located in the mounting groove and is coaxially arranged with the mounting groove. The inner wall of the connecting ring is provided with an L-shaped positioning groove. A positioning block is provided in the positioning groove. The positioning block slides along the positioning groove and is fixedly connected to the connecting part.

[0013] The second spring has one end fixed to the ring saw and the other end abutting against the connecting part.

[0014] Furthermore, the ring saw has a locking groove on the side wall of each mounting groove, the locking groove is connected to the inner cavity of the mounting groove, a locking block is provided in the locking groove, the locking block is equipped with a first spring, and the locking block is connected to the connecting part through the first spring.

[0015] Furthermore, the locking block is a conical block, and the large end of the locking block is attached to the first spring.

[0016] Furthermore, the locking groove is provided in multiple ways, and the multiple locking grooves are evenly distributed along the axial direction of the mounting groove.

[0017] Furthermore, the second spring is equipped with an abutment plate, which is fixedly connected to the second spring, and the abutment plate is always in contact with the connecting part.

[0018] Furthermore, each of the mounting slots is provided with a sealing ring at the slot opening, the inner wall of the sealing ring is attached to the connecting part, and the outer wall of the sealing ring is attached to the side wall of the mounting slot.

[0019] Furthermore, a U-shaped limiting piece is provided in the fixing groove, and the ring saw passes through the inner cavity of the limiting piece;

[0020] The end faces of the limiting plates that are close to each other are provided with positioning wheels. The positioning wheels and the limiting plates are rotatably connected, and the positioning wheels abut against the ring saw.

[0021] (iii) Beneficial effects:

[0022] Compared with existing technologies, this safety ring saw has the following advantages:

[0023] I. This utility model, by setting up a ring saw, allows the operator to control the position of the positioning block relative to the positioning groove, thereby controlling the position of the connecting part and thus completing the positioning of the cutting structure.

[0024] Second, by setting a limiting plate, this utility model can limit the rotation of the ring saw, thus ensuring the cutting stability of the ring saw. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 In this utility model Figure 1 Enlarged diagram of part A in the middle;

[0027] Figure 3 In this utility model Figure 1 Enlarged diagram of section B;

[0028] Figure 4 This is a schematic diagram of the internal structure of the mounting groove in this utility model;

[0029] Figure 5 This is a cross-sectional schematic diagram of the cutting device in this utility model.

[0030] In the diagram: 1. Grip; 11. Handrail area; 12. Fixing groove; 13. Through hole; 14. Drive assembly; 141. Drive motor; 142. Abutment wheel; 15. Limiting plate; 151. Positioning wheel; 2. Ring saw; 21. Mounting groove; 22. Connecting groove; 3. Cutting device; 31. Connecting part; 32. Cutting part; 33. Connecting ring; 331. Positioning groove; 332. Positioning block; 34. Locking groove; 35. Positioning assembly; 351. First spring; 352. Locking block; 36. Second spring; 37. Abutment plate; 38. Sealing ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figure 1-5 As shown, this utility model provides a technical solution including a gripping part 1, a ring saw 2, and a cutting device 3.

[0033] Reference Figure 1 The gripping part 1 is provided with a handrail area 11. In this embodiment, the handrail area 11 can be held by the operator, making it convenient for the operator to grip.

[0034] Reference Figure 1 and Figure 2 On the side of the grip portion 1 away from the armrest area 11, there is a fixing groove 12 and a through hole 13. In this embodiment, the fixing groove 12 is preferably an arc-shaped groove, and the diameter of the fixing groove 12 is larger than the diameter of the ring saw 2. The fixing groove 12 penetrates the grip portion 1, and the axial direction of the fixing groove 12 is parallel to the axial direction of the armrest area 11.

[0035] Reference Figure 1The fixed groove 12 is used to accommodate the ring saw 2, and the ring saw 2 can rotate coaxially along the fixed groove 12.

[0036] Reference Figure 1 and Figure 2 In this embodiment, multiple through holes 13 are provided, and the multiple through holes 13 are arranged sequentially along the arc direction of the ring saw 2. The through holes 13 penetrate the gripping part 1, and the axial direction of the through holes 13 is perpendicular to the axial direction of the fixing groove 12.

[0037] Reference Figure 1 , Figure 4 and Figure 5 Both ends of the through hole 13 are provided with drive components 14. The drive components 14 include a drive motor 141 and an abutment wheel 142. In this embodiment, the drive motor 141 is preferably a servo motor. The housing of the drive motor 141 is fixedly connected to the grip part 1 by screws. The abutment wheel 142 is coaxially fixedly connected to the output end of the drive motor 141 by a key connection. The rotation axis of the abutment wheel 142 is consistent with the radial direction of the ring saw 2. A clamping gap is formed between two adjacent abutment wheels 142. The clamping gap is used to accommodate the ring saw blade 2. The abutment wheel 142 abuts against the side wall of the ring saw 2.

[0038] The drive assembly 14 can provide power to drive the ring saw 2, thereby causing the ring saw 2 to rotate and cut the relevant bone.

[0039] Reference Figure 1 and Figure 3 Both ends of the fixing groove 12 are provided with limiting plates 15, which are preferably U-shaped blocks, and the opening direction of the limiting blocks points to the axis of the ring saw 2. The end faces of the limiting rings that are close to each other are provided with positioning wheels 151. The rotation axis of the positioning wheels 151 is consistent with the radial direction of the ring saw 2, and the positioning wheels 151 can abut against the side wall of the ring saw 2.

[0040] The operator drives the abutment wheel 142 to rotate via the drive motor 141, which in turn drives the ring saw 2 to rotate along the grip part 1. At the same time, the limiting plate 15 can provide a certain limit on the ring saw 2 to ensure the stable rotation of the ring saw 2.

[0041] Reference Figure 1 , Figure 4 and Figure 5 The outer wall of the ring saw 2 has multiple mounting grooves 21 evenly distributed axially. Each mounting groove 21 corresponds to a cutting device 3. The cutting device 3 includes a connecting part 31 and a cutting part 32. The connecting part 31 passes through the mounting groove 21 and can be slidably connected to the ring saw 2 along the opening direction of the mounting groove 21. The cutting part 32 is located at the end of the connecting part 31 away from the ring saw 2, and the cutting part 32 is integrally connected to the connecting part 31 by welding.

[0042] Reference Figure 1 , Figure 4 and Figure 5 In this embodiment, the end of the cutting part 32 away from the connecting part 31 is provided with a blade, and the cutting part 32 is capable of cutting the relevant bone.

[0043] Referring to the figure. The ring saw 2 has a connecting groove 22 at each mounting groove 21. In this embodiment, the connecting groove 22 is preferably a circular groove. The diameter of the connecting groove 22 is larger than the diameter of the mounting groove 21, and the inner cavities of the connecting groove 22 and the mounting groove 21 are connected.

[0044] Reference Figure 1 , Figure 4 and Figure 5 The inner cavity of the connecting groove 22 is coaxially provided with a connecting ring 33. The connecting ring 33 is preferably a hollow circular ring. The connecting ring 33 and the ring saw 2 are fixedly connected. The inner wall of the mounting ring is provided with a positioning groove 331. In this embodiment, the positioning groove 331 is preferably an L-shaped groove. The long side of the vertical part of the positioning groove 331 is parallel to the axial direction of the mounting groove 21, and the long side of the horizontal part of the positioning groove 331 is perpendicular to the long side of the vertical part of the positioning groove 331.

[0045] Reference Figure 1 , Figure 4 and Figure 5 The inner cavity of the positioning groove 331 is provided with a positioning block 332, and the positioning block 332 can slide along the long side of the positioning groove 331. The positioning block 332 is fixedly connected to the connecting part 31 by means of screws.

[0046] Reference Figure 1 , Figure 4 and Figure 5 The side wall of the connecting part 31 is provided with a locking groove 34. The opening direction of the locking groove 34 is horizontal, and the locking groove 34 is connected to the inner cavity of the mounting groove 21.

[0047] Reference Figure 1 , Figure 4 and Figure 5 Each locking groove 34 is provided with a corresponding positioning component 35. The positioning component 35 includes a first spring 351 and a locking block 352. The extension and retraction direction of the first spring 351 is parallel to the opening direction of the mounting groove 21. The two ends of the first spring 351 are fixedly connected to the locking block 352 and the ring saw 2, respectively. The locking groove 34 is used to accommodate the locking block 352.

[0048] Reference Figure 1 , Figure 4 and Figure 5In this embodiment, when the locking block 352 is located at the end of the horizontal portion away from the vertical portion, the locking block 352 is located in the locking groove 34. The locking block 352 is preferably a conical block, wherein the large end of the locking block 352 is connected to the first spring 351.

[0049] Reference Figure 1 , Figure 4 and Figure 5 The cutting device 3 also includes a second spring 36 and an abutment plate 37. The extension and retraction direction of the second spring 36 is parallel to the opening direction of the mounting groove 21, and the second spring 36 and the mounting groove 21 are coaxially arranged. The two ends of the second spring 36 are fixedly connected to the ring saw 2 and the abutment plate 37 respectively, and the abutment plate 37 abuts against the connecting part 31.

[0050] Reference Figure 1 , Figure 4 and Figure 5 In this embodiment, when the positioning block 332 is located in the horizontal part of the positioning groove 331, the second spring 36 is in a compressed state.

[0051] Reference Figure 1 , Figure 4 and Figure 5 The cutting device 3 also includes a sealing ring 38, which is located at the open end of the mounting groove 21. The sealing ring 38 is sandwiched between the connecting parts 31. The inner wall of the sealing ring 38 is attached to the connecting part 31, and the outer wall is attached to the outer wall of the mounting groove 21. The sealing ring 38 is fixedly connected to the criterion by means of screws.

[0052] The operating principle of a safety ring saw is as follows: the operator moves the device to a suitable position by holding the grip part 1, and then drives the ring saw 2 to rotate by the drive motor 141, which drives the cutting part 32 to rotate and remove bone accordingly. During this process, the limiting plate 15 can ensure the rotational stability of the ring saw 2.

[0053] When a cutting part 32 of the ring saw 2 malfunctions and needs to be replaced, the operator only needs to rotate the connecting part 31. At this time, the locking block 352 disengages from the locking groove 34, and the positioning block 332 leaves the positioning groove 331. The operator can then remove the connecting part 31.

[0054] After replacement, simply reverse the above steps. When the positioning block 332 is in the positioning groove 331, the second spring 36 will press the abutment plate 37 against the connecting part 31, effectively preventing the connecting part 31 from sliding and ensuring the stability of the cutting.

Claims

1. A safety ring saw, comprising a grip (1), characterized in that: The grip (1) is provided with a fixing groove (12), the fixing groove (12) contains a ring saw (2), and the ring saw (2) rotates along the grip (1); The outer wall of the ring saw (2) is evenly distributed with several mounting grooves (21). Each mounting groove (21) of the ring saw (2) is provided with a cutting device (3). The cutting device (3) includes: A connecting part (31) passes through the mounting groove (21) and is rotatable along the mounting groove (21); The cutting part (32) is used to cut bone, and the cutting part (32) and the connecting part (31) are fixedly connected; A connecting ring (33) is located in the mounting groove (21) and is coaxially arranged with the mounting groove (21). The inner wall of the connecting ring (33) is provided with an L-shaped positioning groove (331). A positioning block (332) is provided in the positioning groove (331). The positioning block (332) slides along the positioning groove (331), and the positioning block (332) and the connecting part (31) are fixedly connected. The second spring (36) has one end fixed to the ring saw (2) and the other end abutting against the connecting part (31).

2. A safety ring saw according to claim 1, characterized in that: The ring saw (2) has a locking groove (34) on the side wall of each mounting groove (21). The locking groove (34) is connected to the inner cavity of the mounting groove (21). A locking block (352) is provided in the locking groove (34). The locking block (352) is equipped with a first spring (351). The locking block (352) is connected to the connecting part (31) through the first spring (351).

3. A safety ring saw according to claim 2, characterized in that: The locking block (352) is a conical block, and the large end of the locking block (352) is attached to the first spring (351).

4. A safety ring saw according to claim 3, wherein: The locking groove (34) is provided in multiple ways, and the multiple locking grooves (34) are evenly distributed along the axial direction of the mounting groove (21).

5. A safety ring saw according to claim 1, characterized in that: The second spring (36) is provided with an abutment plate (37), the abutment plate (37) and the second spring (36) are fixedly connected, and the abutment plate (37) is always in contact with the connecting part (31).

6. A safety ring saw according to claim 1, characterized in that: Each of the mounting grooves (21) is provided with a sealing ring (38) at the groove opening. The inner wall of the sealing ring (38) is attached to the connecting part (31), and the outer wall of the sealing ring (38) is attached to the side wall of the mounting groove (21).

7. A safety ring saw according to claim 1, characterized in that: The fixing groove (12) is provided with a U-shaped limiting piece (15), and the ring saw (2) passes through the inner cavity of the limiting piece (15); The end faces of the limiting plates (15) that are close to each other are provided with positioning wheels (151), the positioning wheels (151) and the limiting plates (15) are rotatably connected, and the positioning wheels (151) abut against the ring saw (2).

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