Planing tool handle

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a planing tool handle. In order to solve the problems that in the prior art, a planing tool handle suction device is complex and large in size, the planing tool handle comprises an outer shell internally provided with a mounting cavity, a tool apron assembly used for fixing a tool bit assembly is arranged at one end of the outer shell, a pipe joint is arranged at the other end of the outer shell, and a power assembly is arranged in the mounting cavity; a water passing channel penetrating through the two ends of the power assembly is arranged in the power assembly and communicated with the pipe connector. The invention further provides a double-side sealing structure, and the water tightness and the abrasion resistance of the whole waste liquid suction device, especially the rotating connection part of the liquid suction channel in the waste liquid suction process are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a planing tool handle. Background Technology

[0002] Medical shaving equipment is generally used during surgery to shave bone and soft tissues. Common medical shaving equipment mainly consists of a shaving power handle and a blade. Different blades are installed onto the shaving power handle as needed. Because the shaving process generates tissue debris and waste fluid, the blade usually has a hollow structure inside that connects to a negative pressure suction device in the shaving power handle to collect the debris. Common equipment typically uses a suction tube to collect tissue waste fluid from a waste fluid collection groove at the tail of the blade. This requires a relatively large power handle and has a complex structure.

[0003] For example, a Chinese utility model patent discloses a medical planing tool with an endoscope [application number 202121606829.8]. This utility model includes a planing tool and a power handpiece. The planing tool can be fixed to the power handpiece and includes an outer planing tube and an inner planing tube. The outer planing tube includes a camera assembly and a tube body. The camera assembly includes a camera, a light source, and a camera tube body. The camera and light source are installed at the front end of the camera tube body, and a wire passes through the camera tube body. The camera tube body and the outer planing tube are fixed to an outer tube connector, and the wire is connected to a circuit through a groove inside the outer tube connector. This utility model aspirates tissue waste fluid by inserting a suction tube into a groove at the front end of the power unit.

[0004] Although this utility model integrates the endoscope into the power handpiece, the liquid suction function component occupies a large area and has poor structural stability. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a planing tool handle with a hollow water passage connecting the cutter head assembly and the water outlet pipe within the power assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] The present invention provides a planing tool handle, comprising an outer shell with an internal mounting cavity, a tool holder assembly for fixing a tool head assembly at one end of the outer shell, and a pipe connector at the other end, and a power assembly disposed within the mounting cavity; the power assembly is provided with a water passage extending through both ends of the power assembly, and the water passage is connected to the pipe connector.

[0008] The power assembly described above includes a drive motor fixedly mounted within the mounting cavity and a hollow power shaft connected to the drive motor, the drive motor driving the hollow power shaft to rotate. One end of the hollow power shaft is driven and connected to the cutter head assembly, driving the working parts of the cutter head to rotate. The water passage is located inside the hollow power shaft. Motor end caps are provided at both ends of the drive motor, and a sealing element is provided between the end of the motor end cap near the pipe joint and the hollow power shaft. The two sides of the sealing element press against the hollow power shaft and the motor end cap respectively, and the two sides of the sealing element tend to separate from each other; that is, the centrifugal force of the rotating hollow power shaft will squeeze the sealing element, causing it to deform horizontally.

[0009] Preferably, the sealing element includes a base, on which a first sealing arm and a second sealing arm are fixedly connected. The first sealing arm is pressed against the outer surface of the hollow power shaft, and the second sealing arm is pressed against the outer surface of the motor end cover. There is an annular groove between the first sealing arm and the second sealing arm, and the first sealing arm and the second sealing arm tend to move away from each other, that is, they tend to expand in the radial direction of the hollow power shaft, which can fill the gaps caused by wear at any time and improve the wear resistance.

[0010] Furthermore, the sealing element also includes an inner spring ring embedded in an annular groove, the inner spring ring being pressed against the inner surfaces of the first sealing arm and the second sealing arm, and the cross-section of the inner spring ring being U-shaped.

[0011] The above double-layer design increases the thickness of the seal and enhances its wear resistance.

[0012] The inner spring ring can be a commercially available pre-stressed shaft U-shaped seal ring.

[0013] Furthermore, the sealing element is fitted with a sealing rod, one end of which presses against the motor end cover and the sealing element for a sealing connection, and the other end is sealed to the pipe joint, further improving the sealing capability.

[0014] It is easy to imagine that the aforementioned seals are typically made of elastic materials.

[0015] Preferably, the power assembly further includes a transmission seat with one end driven by the hollow power shaft and the other end driven by the cutter head assembly, and at least one seal is provided between the transmission seat and the outer shell.

[0016] Preferably, a buffer cutter holder is fitted inside the transmission seat, and the buffer cutter holder is rotatably connected to the cutter head assembly. In other words, as a common configuration, the buffer cutter holder is inserted into the bottom of the cutter head assembly to buffer impact. The cutter holder assembly includes a cutter holder connector and a connecting sleeve. The outer shell and the cutter holder assembly are fixedly connected through the connecting sleeve. The sealing element is located between the transmission seat and the outer shell.

[0017] Preferably, the seal between the transmission seat and the outer casing is fitted with a grooved sleeve, which presses the seal onto the transmission seat through the pressing force of the outer casing, thus ensuring a stable connection.

[0018] Preferably, the tool holder connector includes a locking sleeve and a fixing sleeve, the fixing sleeve being fitted inside the connecting sleeve body; the fixing sleeve is also fitted with an elastic sealing component inside for sealing the tool head assembly during use, and the locking sleeve is fitted outside the connecting sleeve body.

[0019] As a specific method to achieve the locking effect, preferably, the locking sleeve has a gradually decreasing inner diameter region on the side away from the hollow power shaft, which gradually decreases towards the transmission seat. This gradually decreasing region, together with the outer wall of the fixed sleeve, forms several spherical cavities, each containing several spheres. The fixed sleeve has corresponding slots to accommodate the spheres passing through. A return spring is provided inside both the locking sleeve and the fixed sleeve. The return spring abuts against the spheres, causing them to protrude inward from the slots. The diameter of the slots is smaller than the maximum diameter of the spheres. A circular hole is provided on the base of the cutter head assembly. The lower locking sleeve abuts against the return spring, causing it to disengage from the state of compressing the spheres. After the cutter head assembly is inserted, the return locking sleeve causes the sphere c to spring back up, protruding from the slots and falling into the circular hole of the cutter head assembly base for locking.

[0020] Compared with existing technologies, the advantages of this invention are:

[0021] 1. The waste liquid transfer method provided by the present invention, which uses a hollow power shaft, simplifies the waste liquid absorption process, simplifies the structure, and improves the overall operational reliability.

[0022] 2. The present invention provides a sealing element with an expanding trend along the direction of the hollow power shaft at the water inlet end where the hollow power shaft connects to the cutter head assembly and at the water outlet end of the connecting pipe joint, thereby increasing the long-term stability of the seal. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0025] Figure 3 This is a preliminary exploded view of the present invention;

[0026] Figure 4 This is an exploded view of part of the structure of the present invention;

[0027] Figure 5 This is an exploded view of part of the structure of the present invention;

[0028] Figure 6 This is an exploded view of part of the structure of the present invention;

[0029] Figure 7This is a schematic diagram of the cutter head assembly;

[0030] Figure 8 This is a partial structural diagram of the present invention;

[0031] Figure 9 This is a partial structural diagram of the present invention;

[0032] Figure 10 This is a schematic diagram of the inner spring ring;

[0033] Figure 11 This is a partial structural diagram of the present invention.

[0034] In the diagram: outer shell 1, tool holder assembly 2, sealing assembly 3, water passage 4, tool holder connector 2a, locking sleeve 2a1, fixing sleeve 2a2, connecting sleeve 2b, anti-drive motor 31, hollow power shaft 32, motor end cover 33, first seal 34, transmission seat 35, base 341, first sealing arm 342, second sealing arm 343, annular groove 344, inner spring ring 345, grooved sleeve 36, tool head assembly d, round hole d1, mounting cavity 1a, pipe connector 1b, gradient area 2a11, hole groove 2a21, ball cavity q, ball c, return spring t, sealing pressure rod y. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] This invention relates to a planing handle with a hollow power shaft, such as... Figure 1-3 As shown, it includes an outer shell 1 with an internal mounting cavity 1a. One end of the outer shell 1 is provided with a tool holder assembly 2 for mounting the tool head assembly d, and the other end is provided with a pipe connector 1b. The mounting cavity 1a is provided with a power assembly 3. The power assembly 3 is provided with a water passage 4 that runs through both ends of the power assembly 3. The water passage 4 is connected to the pipe connector 1b.

[0037] The power assembly 3 includes a drive motor 31 fixedly installed in the mounting cavity 1a and a hollow power shaft 32 connected to the drive motor 31. One end of the hollow power shaft 32 is drivenly connected to the cutter head assembly d. The water passage 4 is located inside the hollow power shaft 32. Both ends of the drive motor 31 are provided with motor end caps 33.

[0038] It is easy to imagine that the water passage 4 can be accommodated inside the hollow power shaft 32, or the hollow power shaft 32 itself can serve as the water passage 4 and be extended at both ends of the drive motor 31. In this embodiment, the hollow power shaft 32 is preferred as the water passage 4.

[0039] To achieve a watertight seal, a sealing element 34 is provided between the end of the motor end cover 33 near the pipe joint 1b and the hollow power shaft 32. The two sides of the sealing element 34 are respectively pressed onto the hollow power shaft 32 and the motor end cover 33, and the two sides of the sealing element 34 tend to separate from each other, that is, they tend to squeeze towards the hollow power shaft 32 to fill the wear gap at any time and improve the sealing stability.

[0040] In use, the hollow power shaft 32 drives the cutter head assembly d to rotate. As a conventional setting for the planing cutter head, the movable cutter head inside the cutter head assembly d is hollow. Under the suction force of the negative pressure device installed on the pipe joint 1b, the tissue debris and waste liquid generated by the planing cutter head enter the water passage 4, i.e., the hollow power shaft 32 in the preferred embodiment, through the internal pipe of the movable cutter head, and are then sucked out from the hollow power shaft 32 to the pipe joint 1b. The sealing element 34 provides good water tightness between the hollow power shaft 32 and the pipe joint 1b, which can prevent water from entering the motor.

[0041] As a preferred option, such as Figure 9 , 11 As shown, the sealing element 34 includes a base 341, on which a first sealing arm 342 and a second sealing arm 343 are fixedly connected. The first sealing arm 342 is pressed against the outer surface of the hollow power shaft 32, and the second sealing arm 343 is pressed against the outer surface of the motor end cover 33. There is an annular groove 344 between the first sealing arm 342 and the second sealing arm 343, and the first sealing arm 342 and the second sealing arm 343 tend to move away from each other. That is, when the sealing element 34 is worn by the hollow power shaft 32, the first sealing arm 342 can continuously press closer to the hollow power shaft 32 to maintain the sealing performance.

[0042] Furthermore, the sealing element 34 also includes an inner spring ring 345 embedded in the annular groove 344. The inner spring ring 345 is pressed against the inner surface of the first sealing arm 342 and the second sealing arm 343. The cross-section of the inner spring ring 345 is U-shaped.

[0043] It is easy to imagine that, in order to achieve a good nested sealing effect, the components of the sealing element 34 are preferably made of elastic material.

[0044] The inner spring ring 345 can use commercially available pre-stressed shaft U-shaped seals.

[0045] For the sake of structural aesthetics and stability, it is conceivable that the motor end cover 33 and the pipe connector 1b are either covered by the outer shell 1 or further nested with a protective shell.

[0046] Furthermore, to match the cutter head component d, such as Figure 3As shown, the power assembly 3 also includes a transmission seat 35, one end of which is driven and connected to the hollow power shaft 32, and the other end of which is driven and connected to the cutter head assembly d. To increase water tightness, at least one sealing element 34 is also provided between the transmission seat 35 and the outer casing 1. The sealing element 34 here can have the same configuration as the sealing element 34 provided near the pipe joint 1b, that is, both include an outer sealing ring for installing a U-shaped sealing ring and a prestressed shaft U-shaped sealing ring nested inside.

[0047] As a preferred option, such as Figure 2 , 4 As shown, a bearing can be added to the transmission seat 35 on the side of the seal 34 near the motor end cover 33 to bear the radial load of the hollow drive shaft 32.

[0048] Preferred, such as Figure 8 As shown, the sealing element 36 includes a grooved sleeve 361, a sealing pressure ring 362, and a U-shaped inner spring ring 363. The U-shaped inner spring ring 363 is nested in the groove of the U-shaped sealing pressure ring 362. The grooved sleeve 36 secures the sealing element 34 to the transmission seat 35 by the pressing force of the outer shell 1.

[0049] Preferably, a buffer cutter holder 35a is provided inside the transmission seat 35, and the buffer cutter holder 35a is rotatably connected to the cutter head assembly d; the bottom of the cutter head assembly d is inserted into the buffer cutter holder 35a, which plays a buffering role when the cutter head is compressed.

[0050] As a preferred option, such as Figure 5 As shown, the tool holder assembly 2 includes a tool holder connector 2a and a connecting sleeve 2b, and the outer shell 1 is fixedly connected to the tool holder assembly 2 through the connecting sleeve 2b.

[0051] Preferably, the tool holder connector 2a includes a locking sleeve 2a1 and a fixing sleeve 2a2, the fixing sleeve 2a2 being fitted inside the connecting sleeve body 2b; an elastic sealing component 2c is also fitted inside the fixing sleeve 2a2 to achieve sealing after the tool head assembly d is inserted, and the locking sleeve 2a1 is fitted outside the connecting sleeve body 2b. The sealing component 2c is used to seal the inserted tool head assembly d.

[0052] The specific method for achieving locking is as follows: (e.g.) Figure 2 , 5As shown, the locking sleeve 2a1 has a gradually decreasing inner diameter region 2a11 on the side away from the hollow power shaft 32, which gradually decreases towards the transmission seat 35. The region 2a11 and the outer wall of the fixed sleeve 2a2 together form a spherical cavity q, which contains several spheres c. The fixed sleeve 2a2 has corresponding slots 2a21 for accommodating the spheres c. A return spring t is provided inside the locking sleeve 2a1 and the fixed sleeve 2a2. One end of the return spring t is pressed against the locking sleeve 2a1. One end is pressed onto the connecting sleeve 2b. The return spring t abuts against the ball c, causing it to protrude inward from the groove 2a21. The diameter of the groove 2a21 is smaller than the maximum diameter of the ball c. The base of the cutter head assembly d is provided with a circular hole d1. The lower locking sleeve 2a1 drives the return spring t to disengage from the state of pressing the ball. After the cutter head assembly d is inserted, the return locking sleeve 2a1 causes the ball c to bounce up again, protruding from the groove 2a21 and falling into the circular hole d1 of the base of the cutter head assembly d for locking.

[0053] The working principle of this invention is as follows: Figure 2 , 5 As shown in Figure 7, the cutter head assembly d is inserted into the cutter holder assembly 2, and the locking sleeve 2a1 is pressed to force the ball c into the round hole d1 on the cutter head assembly d for fixation. The power assembly 3 is started, and the drive motor 31 drives the hollow power shaft 32, which in turn drives the transmission seat 35 to rotate. The transmission seat 35 drives the cutter head assembly d to work. As a common cutter head setting, those skilled in the art should understand that the cutter head assembly d has an inner and outer two-layer structure. The outer seat is used for fixation, and the inner cutter bar rotates for planing, that is, the transmission seat 35 drives the inner cutter bar to rotate for planing. The outer seat is fixed at the cutter holder joint 2a. The middle part of the inner cutter bar is a hollow structure. The waste liquid from planing passes through the hollow channel of the inner cutter bar to the water passage 4, that is, the hollow power shaft 32 in this embodiment. It is sucked out from the pipe interface 1b by the negative pressure suction device and flows out in an almost straight line, which greatly saves space and improves the liquid suction efficiency. The seal 34 on the water outlet side greatly improves the water tightness of the hollow drive shaft 32 interface. The inner spring ring 345 adopts the setting of a shaft U-shaped sealing ring, which can expand along the axis of the central control drive shaft 32 to both sides at any time when it is worn, thus improving the stability of the sealing effect. The sealing pressure rod y further improves the water tightness between the drive motor 31 and the pipe interface 1b.

[0054] Meanwhile, the design of the seal 34 located on the transmission seat 35 also has a similar effect, further improving the overall water tightness and sealing stability of the device.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0056] Although this document frequently uses terms such as outer shell 1, tool holder assembly 2, sealing assembly 3, water passage 4, tool holder connector 2a, locking sleeve 2a1, fixing sleeve 2a2, connecting sleeve 2b, anti-drive motor 31, hollow power shaft 32, motor end cover 33, first seal 34, transmission seat 35, base 341, first sealing arm 342, second sealing arm 343, annular groove 344, inner spring ring 345, grooved sleeve 36, tool head assembly d, round hole d1, mounting cavity 1a, pipe connector 1b, gradient area 2a11, hole groove 2a21, ball cavity q, ball c, return spring t, and sealing pressure rod y, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A planing tool handle, comprising an outer shell (1) having an internal mounting cavity (1a), one end of the outer shell (1) having a tool holder assembly (2) for mounting a tool head assembly (d), and the other end having a pipe connector (1b), wherein a power assembly (3) is disposed within the mounting cavity (1a), characterized in that: The power assembly (3) is provided with a water passage (4) that runs through both ends of the power assembly (3), and the water passage (4) is connected to the pipe joint (1b).

2. A planing tool handle as described in claim 1, characterized in that: The power assembly (3) includes a drive motor (31) fixedly installed in the mounting cavity (1a) and a hollow power shaft (32) connected to the drive motor (31). One end of the hollow power shaft (32) is drivenly connected to the cutter head assembly (d). The water passage (4) is located inside the hollow power shaft (32). Both ends of the drive motor (31) are provided with motor end caps (33). A sealing element (34) is provided between the motor end cap (33) near the pipe joint (1b) and the hollow power shaft (32). The two sides of the sealing element (34) are respectively pressed on the hollow power shaft (32) and the motor end cap (33), and the two sides of the sealing element (34) tend to separate from each other.

3. A planing tool handle as described in claim 2, characterized in that: The sealing element (34) includes a base (341), on which a first sealing arm (342) and a second sealing arm (343) are fixedly connected. The first sealing arm (342) is pressed against the outer surface of the hollow power shaft (32), and the second sealing arm (343) is pressed against the outer surface of the motor end cover (33). There is an annular groove (344) between the first sealing arm (342) and the second sealing arm (343), and the first sealing arm (342) and the second sealing arm (343) tend to move away from each other.

4. A planing tool handle as described in claim 3, characterized in that: The sealing element (34) further includes an inner spring ring (345) embedded in an annular groove (344), the inner spring ring (345) being pressed against the inner surfaces of the first sealing arm (342) and the second sealing arm (343), and the cross-section of the inner spring ring (345) being U-shaped.

5. A planing tool handle as described in claim 4, characterized in that: The sealing element (34) is fitted with a sealing pressure rod (y). One end of the sealing pressure rod (y) is pressed onto the motor end cover (33) and the sealing element (34) for sealing connection, and the other end is sealed to the pipe joint (1b).

6. A planing tool handle as described in claim 2, characterized in that: The power assembly (3) further includes a transmission seat (35) with one end connected to the hollow power shaft (32) and the other end connected to the cutter head assembly (d). At least one seal (34) is provided between the transmission seat (35) and the outer shell (1).

7. A planing tool handle as described in claim 6, characterized in that: The sealing element (34) between the transmission seat (35) and the outer shell (1) is covered with a grooved sleeve (36), and the grooved sleeve (36) presses the sealing element (34) onto the transmission seat (35) by the pressing force of the outer shell (1).

8. A planing tool handle as described in claim 6, characterized in that: The transmission seat (35) is fitted with a buffer cutter holder (35a), which is rotatably connected to the cutter head assembly (d); the cutter holder assembly (2) includes a cutter holder connector (2a) and a connecting sleeve (2b), and the outer shell (1) and the cutter holder assembly (2) are fixedly connected through the connecting sleeve (2b).

9. A planing tool handle as described in claim 8, characterized in that: The tool holder connector (2a) includes a locking sleeve (2a1) and a fixing sleeve (2a2). The fixing sleeve (2a2) is fitted inside the connecting sleeve body (2b). An elastic sealing component (2c) is also fitted inside the fixing sleeve (2a2). The locking sleeve (2a1) is fitted outside the connecting sleeve body (2b).

10. A planing tool handle as described in claim 9, characterized in that: The locking sleeve (2a1) has a gradually decreasing inner diameter region (2a11) on the side away from the hollow power shaft (32) towards the transmission seat (35). The region enclosed by the gradually decreasing inner diameter region (2a11) and the outer wall of the fixed sleeve (2a2) forms a spherical cavity (q), which contains several spheres (c). The fixed sleeve (2a2) has corresponding slots (2a21) for accommodating the spheres (c) to pass through. The locking sleeve (2a1) and the fixed sleeve (2a2) are equipped with a return spring (t), one end of which is pressed against the locking sleeve (2a1). One end of the blade assembly (d) is pressed onto the connecting sleeve (2b), and the return spring (t) abuts against the ball (c), causing it to protrude inward from the groove (2a21). The diameter of the groove (2a21) is smaller than the maximum diameter of the ball (c). The base of the blade assembly (d) has a circular hole (d1). The lower locking sleeve (2a1) drives the return spring (t) to disengage from the state of pressing the ball. After the blade assembly (d) is inserted, the return locking sleeve (2a1) causes the ball (c) to spring up again, protruding from the groove (2a21) and falling into the circular hole (d1) of the base of the blade assembly (d) for locking.

Images