Bent water injection planer tool assembly and planer tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a bent water injection planer tool assembly and a planer tool, the bent water injection planer tool assembly comprises an inner pipe part, a middle pipe part and an outer pipe, the inner pipe part comprises an inner pipe and an inner tool bit, and the inner pipe is fixedly communicated with the inner tool bit; the middle pipe part comprises a middle pipe and an outer tool bit, and the middle pipe is fixedly communicated with the outer tool bit; the outer tool bit is rotationally arranged on the inner tool bit in a sleeving manner, the middle pipe is rotationally arranged on the inner pipe in a sleeving manner, and the outer pipe is arranged on the middle pipe and the outer tool bit in a sleeving manner; a gap is formed between the outer tube and the middle tube as well as between the outer tube and the outer cutter head; a first water injection hole communicated with the inner tube is formed in the part, positioned in the gap, of the outer cutter head; the inner pipe, the middle pipe and the outer pipe are integrally bent to form an arc-shaped section, and the arc-shaped section of the inner pipe is a soft spring section. According to the bent planer tool, the inner tool bit and the outer tool bit of the bent planer tool can be driven by rotation of the inner pipe to cut soft tissue, water can be injected into the tool bit portion of the bent planer tool, the purpose of wetting and cooling the tool bit is achieved, and the problem that the cut soft tissue blocks a negative pressure channel is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bent water injection cutter head assembly and a cutter head. Background Art

[0002] A cutter head is a tool often used in minimally invasive endoscopic surgery, mainly used for shaving soft tissues in surgical operations such as otolaryngology, joints, urology, and gynecology. Through a negative pressure suction pipe connected to a negative pressure suction device, negative pressure is transmitted to the front end through a hollow tool, sucking the soft tissue into the knife edge. The outer knife barrel of the tool is fixed, and the tool makes a reciprocating rotational motion driven by a motor, so that the cutting end of the tool cuts off the soft tissue.

[0003] In some usage environments such as otolaryngology and joints, there is no water in the cutting environment of the cutter head, which may cause the soft tissue to block the negative pressure channel after being cut; moreover, without the moisture of water during cutting, the purpose of wetting and cooling the cutter head cannot be achieved. To solve this problem, the prior art adopts a cutter head structure in which an inner tube is sleeved outside an outer tube, and water is injected through the gap between the two pipes of the cutter head. However, in soft tissue cutting operations at certain angles, for the convenience of the operation, the pipes of the cutter head need to have a certain bending arc. If the existing round tubes are used to make the inner tube and the outer tube, when the inner tube and the outer tube are bent into a preset angle together using a special tooling during processing, if the inner tube is bent by a large arc, the inner tube can no longer rotate inside the outer tube, that is, it cannot drive the inner cutter head and the outer cutter head to rotate relative to each other to cut the soft tissue. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a bent water injection cutter head assembly and a cutter head, which can not only drive the inner cutter head and the outer cutter head of the bent cutter head to cut soft tissues by the rotation of the inner tube, but also inject water into the cutter head part of the bent cutter head to achieve the purpose of wetting and cooling the cutter head, and prevent the problem of soft tissues after cutting from blocking the negative pressure channel.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In a first aspect, the present utility model discloses a bent water injection planing tool assembly, which includes an inner tube component, an intermediate tube component, and an outer tube. The inner tube component includes an inner tube and an inner cutter head, and the inner tube is fixedly communicated with the inner cutter head; the intermediate tube component includes an intermediate tube and an outer cutter head, and the intermediate tube is fixedly communicated with the outer cutter head; the inner cutter head is rotatably arranged inside the outer cutter head, the inner tube is rotatably arranged inside the intermediate tube, the outer tube is sleeved on the intermediate tube and the outer cutter head, and one end of the outer tube close to the outer cutter head is fixed to the outer cutter head; there is a gap between the outer tube and the intermediate tube and the outer cutter head, and a first water injection hole communicated with the inner tube is arranged on the part of the outer cutter head located in the gap; the inner tube, the intermediate tube, and the outer tube are integrally bent to have an arc section, and the arc section of the inner tube is a soft spring section.

[0007] In this technical solution, external water injection can enter the gap between the outer tube and the intermediate tube and the outer cutter head, and then the water reaches the first water injection hole through the gap. The water then enters the gap between the outer cutter head and the inner cutter head through the first water injection hole to achieve the purpose of wetting and cooling the cutter head; because the arc section of the inner tube is a soft spring section, it can also transmit torque after being bent. Therefore, when the inner tube rotates, it can drive the inner cutter head to rotate. The inner cutter head rotates while the outer cutter head is stationary, so the outer cutter head and the inner cutter head run relatively to cut soft tissue. After the soft tissue is cut, it enters the pipeline of the inner tube together with water. Generally, the inner tube is externally connected to a negative pressure suction device. Under the suction of negative pressure, the mixture of soft tissue and water is taken out through the pipeline of the inner tube. During this process, because the soft tissue is diluted by water, it is not easy to block the pipeline of the inner tube, making the operation proceed smoothly.

[0008] Further, a spiral tube is sleeved on the arc section of the intermediate tube. Since the inner tube and the outer tube are bent into a certain arc during processing, before processing, generally the intermediate tube and the outer tube are both straight tubes. When bending and processing, the outer tube is sleeved on the intermediate tube and integrally bent. However, because generally the outer tube and the intermediate tube are both relatively thin, the gap between the outer tube and the intermediate tube at the bending section may be blocked during integral bending, resulting in inability to inject water. Therefore, a spiral tube is sleeved on the arc section of the intermediate tube. During bending and processing, it can ensure that the water flow channel at the bending part will not be blocked, thus ensuring the smooth water flow in the gap between the outer tube and the intermediate tube.

[0009] Further, an avoidance structure is arranged at the first water injection hole of the outer cutter head, and the first water injection hole is arranged on the avoidance structure. The arrangement of the avoidance structure in this technical solution can make the space at the water inlet position of the first water injection hole larger, which is conducive to guiding the water coming from the gap into the first water injection hole.

[0010] Further, window structures are provided on both the inner cutter head and the outer cutter head, and a plurality of tooth edge cutters are provided on the edges of the window structures. In this technical solution, a rotational shearing effect is formed between the tooth edge cutters of the inner cutter head and the outer cutter head, which is beneficial to cutting the soft tissue sucked in by negative pressure and avoiding large pieces of soft tissue from entering the inner tube or the suction tube to cause blockage.

[0011] Further, a front adapter sleeve is fixedly sleeved at one end of the outer tube away from the outer cutter head. A first stepped hole is provided at one end of the front adapter sleeve close to the outer cutter head. There is a water flow channel between the middle tube and the inner wall of the large hole of the first stepped hole, and the water flow channel is communicated with the gap. A second water injection hole communicated with the water flow channel is provided on the front adapter sleeve, and a water injection pipeline is communicated with the second water injection hole. In this technical solution, the external injected water can first enter the second water injection hole through the water injection pipeline, then pass through the second water injection hole into the water flow channel, and finally enter the gap between the middle tube and the outer tube to achieve the purpose of smooth water flow.

[0012] Further, a second stepped hole is provided at one end of the front adapter sleeve away from the outer cutter head, and the first stepped hole is communicated with the second stepped hole. A bearing is provided in the large hole of the second stepped hole. The inner ring of the bearing is fixedly connected with a bushing, and the inner ring of the bushing is fixedly connected with a gear adapter sleeve. One end of the inner tube away from the inner cutter head passes through the gear adapter sleeve and is fixedly connected with the gear adapter sleeve. In this technical solution, the gear adapter sleeve can be connected to an external power mechanism, and the external power mechanism drives it to rotate, and then drives the inner tube to rotate. The setting of the bearing makes the friction of the entire rotating mechanism smaller and the noise smaller.

[0013] Further, a sealing ring is provided between the bottom of the second stepped hole and the bearing. The end of the middle tube away from the outer cutter head abuts against the sealing ring, and the gear adapter sleeve is hermetically fixed through the sealing ring. The setting of the sealing ring in this technical solution can effectively seal the water entering the water flow channel and prevent the water from entering the tail end of the front adapter sleeve.

[0014] Further, one end of the water injection pipeline is connected with a water injection joint, and the other end of the water injection pipeline is connected with a tapered joint, and the water injection joint is connected to the second water injection hole. In this way, the external water source and the second water injection hole can be connected through the water injection pipeline.

[0015] In a second aspect, the present utility model also discloses a planing cutter, which includes a planing cutter body and the above-mentioned planing cutter assembly.

[0016] The beneficial effects of the present utility model:

[0017] 1. When the utility model is used, external water can enter the second water injection hole through the water injection pipeline, then enter the water flow channel, and then enter the gap between the outer tube, the middle tube and the outer cutter head. The water reaches the first water injection hole through the gap, and finally enters the gap between the outer cutter head and the inner cutter head through the first water injection hole to achieve the purpose of wetting and cooling the cutter head.

[0018] 2. In the utility model, since the arc section of the inner tube is a soft spring section, it can also transmit torque after being bent. Therefore, when the inner tube rotates, it can drive the inner cutter head to rotate. When the inner cutter head rotates and the outer cutter head is stationary, the outer cutter head and the inner cutter head move relative to each other to cut the soft tissue. After the soft tissue is cut, it enters the pipeline of the inner tube together with water. The inner tube is generally connected to a negative pressure suction device. Under the suction of negative pressure, the soft tissue is mixed with water and then passed through the pipeline of the inner tube and is taken out. In this process, because the soft tissue is diluted by water, it is not easy to block the pipeline of the inner tube, so that the operation can be carried out smoothly.

[0019] 3. The overlapping edges of the inner and outer blades of the utility model form a rotational shearing effect, which is conducive to shearing off the soft tissue sucked in by the negative pressure, preventing larger pieces of soft tissue from entering the inner tube or the suction tube, and further reducing the possibility of blockage.

[0020] 4. The utility model has a spiral tube sleeved on the arc section of the middle tube, which can ensure that the water flow channel in the bent portion will not be blocked during the integral bending process, thereby ensuring smooth water flow in the gap between the outer tube and the middle tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a curved water injection planer assembly of the utility model;

[0022] Figure 2 for Figure 1 Exploded diagram of

[0023] Figure 3 for Figure 1 A schematic cross-sectional structure diagram of ;

[0024] Figure 4 for Figure 3 A magnified view of the local structure at point A in the middle;

[0025] Figure 5 for Figure 3 The enlarged view of the local structure in B;

[0026] Figure 6 for Figure 2 A schematic diagram of the structure of the intermediate pipe component;

[0027] Figure 7 for Figure 6 A magnified view of the local structure at C in the middle;

[0028] Figure 8 For Figure 2 The structural schematic diagram of the front adapter sleeve in

[0029] Among them, the outer tube 1, the inner tube 2, the inner cutter head 3, the intermediate tube 4, the outer cutter head 5, the window structure 6, the tooth part cutting edge 7, the first water injection hole 8, the avoidance structure 9, the spiral tube 10, the soft spring section 11, the front adapter sleeve 12, the water flow channel 13, the second water injection hole 14, the water injection pipeline 15, the water injection joint 16, the tapered joint 17, the bearing 18, the bushing 19, the gear adapter sleeve 20, the sealing ring 21. Specific implementation manners

[0030] The present utility model will be described in detail below with reference to the accompanying drawings:

[0031] Embodiment 1,

[0032] As Figures 1-8 shown, this embodiment is a bent water injection planing cutter assembly, including an inner tube component, an intermediate tube component and an outer tube 1. The inner tube component includes an inner tube 2 and an inner cutter head 3, and the inner tube 2 is fixedly connected to the inner cutter head 3; the intermediate tube component includes an intermediate tube 4 and an outer cutter head 5, and the intermediate tube 4 is fixedly connected to the outer cutter head 5; the inner cutter head 3 is rotatably arranged inside the outer cutter head 5, the inner tube 2 is rotatably sleeved inside the intermediate tube 4, the outer tube 1 is sleeved on the intermediate tube 4 and the outer cutter head 5, and the left end of the outer tube 1 is hermetically fixed to the outer cutter head 5. Window structures 6 are provided on both the inner cutter head 3 and the outer cutter head 5, and a plurality of tooth part cutting edges 7 are integrally formed on the edges of the window structures 6; there is a gap between the outer tube 1 and the intermediate tube 4 and the outer cutter head 5, and a first water injection hole 8 communicating with the inner tube 2 is provided on the part of the outer cutter head 5 located in the gap. An avoidance structure 9 is provided at the first water injection hole 8 of the outer cutter head 5, and the first water injection hole 8 is provided on the avoidance structure 9. The avoidance structure 9 can be a flat side, a groove or a step provided on the outer cutter head 5, etc. In this embodiment, it is a flat side provided on the outer cutter head 5, that is, a plane is provided at the first water injection hole 8 of the outer cutter head 5; the inner tube 2, the intermediate tube 4 and the outer tube 1 are integrally bent to have an arc section. Among them, a spiral tube 10 is sleeved on the arc section of the intermediate tube 4, and the spiral tube 10 is located in the gap. The spiral tube 10 in this embodiment is a spiral spring, and the arc section of the inner tube 2 is a soft spring section 11.

[0033] A front adapter sleeve 12 is fixedly sleeved on the right end of the outer tube 1. A first stepped hole is formed at the left end of the front adapter sleeve 12. There is a water flow channel 13 between the inner wall of the large hole of the first stepped hole and the intermediate tube 4, and the water flow channel 13 is communicated with the gap; a second water injection hole 14 communicated with the water flow channel 13 is formed on the front adapter sleeve 12. A water injection pipeline 15 is communicated with the second water injection hole 14. The left end of the water injection pipeline 15 is connected with a water injection joint 16. The water injection joint 16 is inserted into the second water injection hole 14 and fixed to the front adapter sleeve 12 and communicated with the second water injection hole 14. The right end of the water injection pipeline 15 is connected with a tapered joint 17 for connecting an external water source.

[0034] A second stepped hole is formed at the right end of the front adapter sleeve 12. The first stepped hole is communicated with the second stepped hole; a bearing 18 is installed in the large hole of the second stepped hole. The inner ring of the bearing 18 is fixedly connected with a bushing 19. The inner ring of the bushing 19 is fixedly connected with a gear adapter sleeve 20. The right end of the inner tube 2 passes through the gear adapter sleeve 20 and is fixedly connected with the gear adapter sleeve 20. A sealing ring 21 is installed between the bottom of the second stepped hole and the bearing 18. The right end of the intermediate tube 4 abuts against the sealing ring 21. The gear adapter sleeve 20 is hermetically fixed and passes through the sealing ring 21.

[0035] The usage method of the present utility model is as follows:

[0036] Before the present utility model is used, the gear adapter sleeve 20 can be connected to an external power system (such as a gear reduction mechanism driven by a motor), the tapered joint 17 is connected to an external water source (such as a peristaltic pump), and an external negative pressure suction device (such as a suction pump) is connected to the right end of the inner tube 2.

[0037] During the operation, one end of the outer cutter head 5 is inserted into the operation site, and the window structures 6 of the outer cutter head 5 and the inner cutter head 3 are aligned with the soft tissue to be planed; at this time, the suction device evacuates the inner tube 2 to suck the soft tissue into the window structures 6 of the inner cutter head 3 and the outer cutter head 5.

[0038] At the same time, the external water source can enter the second water injection hole 14 through the water injection pipeline 15, then enter the water flow channel 13, and then enter the gap between the outer tube 1, the intermediate tube 4 and the outer cutter head 5. Because a spiral tube 10 is sleeved on the arc section of the intermediate tube 4, when the integral bending is processed, it can ensure that the water flow channel 13 at the bending part will not be blocked, so as to ensure the smooth water flow between the outer tube 1 and the intermediate tube 4; the water reaches the first water injection hole 8 through the gap, and finally the water enters the gap between the outer cutter head 5 and the inner cutter head 3 through the first water injection hole 8 to achieve the purpose of wetting and cooling the cutter head.

[0039] An external power system drives the gear adapter sleeve 20 and the inner tube 2 to rotate. The rotation of the inner tube 2 transmits torque to the inner cutter head 3. The inner cutter head 3 rotates while the outer cutter head 5 remains stationary, and a rotational shearing effect is formed between the tooth edges 7 of the inner cutter head 3 and the outer cutter head 5; the rotational shearing formed between the tooth edges 7 of the inner cutter head 3 and the outer cutter head 5 is used to plane soft tissues.

[0040] The planed soft tissues and water enter the inner tube 2 under the action of negative pressure and are finally sucked out by a negative pressure device. During this process, since the soft tissues are diluted by water, they are not likely to block the pipeline of the inner tube 2, enabling the operation to proceed smoothly.

[0041] Embodiment 2

[0042] This embodiment is a planing knife, and the planing knife includes a planing knife body and the planing knife assembly of the above Embodiment 1.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A bent water injection planer tool assembly, characterized in that: It includes an inner tube component, an intermediate tube component and an outer tube. The inner tube component includes an inner tube and an inner cutter head, and the inner tube is fixedly communicated with the inner cutter head; the intermediate tube component includes an intermediate tube and an outer cutter head, and the intermediate tube is fixedly communicated with the outer cutter head; the inner cutter head is rotatably arranged inside the outer cutter head, the inner tube is rotatably arranged inside the intermediate tube, the outer tube is sleeved on the intermediate tube and the outer cutter head, and one end of the outer tube close to the outer cutter head is fixed to the outer cutter head; there is a gap between the outer tube and the intermediate tube and the outer cutter head, and a first water injection hole communicated with the inner tube is arranged on the part of the outer cutter head located in the gap; the inner tube, the intermediate tube and the outer tube are integrally bent to have an arc section, and the arc section of the inner tube is a soft spring section.

2. The bent water injection planer tool assembly according to claim 1, characterized in that: A spiral tube is sleeved on the arc section of the intermediate tube.

3. The curved water injection planer tool assembly according to claim 1, wherein: An avoidance structure is arranged at the first water injection hole of the outer cutter head, and the first water injection hole is arranged on the avoidance structure.

4. A bent water injection planer tool assembly according to claim 1, characterized in that: Window structures are opened on both the inner cutter head and the outer cutter head, and a plurality of tooth edge cutters are arranged on the edges of the window structures.

5. The bent water injection planer knife assembly according to claim 1, characterized in that: A front adapter sleeve is fixedly sleeved on the end of the outer tube away from the outer cutter head. A first stepped hole is opened at one end of the front adapter sleeve close to the outer cutter head. There is a water flow channel between the intermediate tube and the inner wall of the large hole of the first stepped hole, and the water flow channel is communicated with the gap; a second water injection hole communicated with the water flow channel is opened on the front adapter sleeve, and a water injection pipeline is communicated with the second water injection hole.

6. The bent water injection planer tool assembly according to claim 5, characterized in that: A second stepped hole is opened at the end of the front adapter sleeve away from the outer cutter head, and the first stepped hole is communicated with the second stepped hole; a bearing is arranged in the large hole of the second stepped hole. The inner ring of the bearing is fixedly connected with a bushing, and the inner ring of the bushing is fixedly connected with a gear adapter sleeve. One end of the inner tube away from the inner cutter head passes through the gear adapter sleeve and is fixedly connected with the gear adapter sleeve.

7. The bent water injection planer tool assembly according to claim 6, wherein: A sealing ring is arranged between the bottom of the second stepped hole and the bearing. The end of the intermediate tube away from the outer cutter head abuts against the sealing ring, and the gear adapter sleeve is hermetically fixed and passes through the sealing ring.

8. The bent water injection planer tool assembly according to claim 5, characterized in that: One end of the water injection pipeline is connected with a water injection joint, and the other end of the water injection pipeline is connected with a tapered joint, and the water injection joint is connected to the second water injection hole.

9. A planer tool, characterized in that: The planer knife includes a planer knife body and the planer knife assembly according to any one of claims 1-8.

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