Drive handle

Abstract

Provided in the present invention is a drive handle, comprising a handle housing and a motor. The motor is arranged inside the handle housing, the handle housing can be connected to a cutter housing, and an output shaft of the motor can provide a driving force for a cutter. An oil injection channel is further arranged in the handle housing. The oil injection channel comprises a radial oil injection groove and an axial oil injection pipe. The radial oil injection groove is in communication with the axial oil injection pipe. The axial oil injection pipe is in communication with a rotation gap between a stator and a rotor. The radial oil injection groove has an oil injection port formed on a side wall of the handle housing, and an oil sealing assembly for closing or opening the oil injection port is arranged in the radial oil injection groove. By means of the elasticity of a compression spring, when an external pressure is applied to a ball head of a movable member, the compression spring contracts under the action of the force to open the oil injection port, and when the external pressure is removed, the compression spring resets to close the oil injection port, thereby achieving sealing of the oil injection port. The motor is cooled by means of a water injection channel integrated in the handle housing, and water can be injected into the water injection channel of the cutter, thereby improving user experience.

Description

Drive handle Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a drive handle. Background Technology

[0002] In orthopedic surgery, bone tissue often needs to be ground down. Manual operation is difficult to control the grinding force and is inconvenient. Therefore, an electric motor is usually used to drive the cutting tool to grind down the bone tissue and remove excess bone. However, the motor continuously generates heat during the grinding process, which is conducted to the handle. When used for a long time, the handle temperature will become too high, affecting the surgeon's operation and bringing additional risks to the operation. It can also cause the motor to overheat and even burn out. In addition, the inside of the handle is also susceptible to moisture in the air and water ingress due to improper operation, which can cause the motor to rust, affecting the motor function and reducing the lifespan of the handle.

[0003] Chinese patent application CN115211929A discloses a power-driven handle, including a mounting sleeve, a base, and a cable guard. The mounting sleeve has a water inlet and a wiring hole, and a groove on its outer wall. An outer sleeve is fitted over the outer side of the mounting sleeve, with the inner wall of the outer sleeve and the groove wall forming a water channel. This invention features an oil injection pipe on the mounting sleeve and a water channel on the outer side of the mounting sleeve communicating with the water inlet and outlet, allowing for both lubrication during maintenance and water cooling during use. However, the opening of the oil injection pipe is located at one end of the handle with a fixing hole, which can easily lead to oil leakage.

[0004] Chinese patent application CN218128655U discloses a power-driven handle, including a mounting sleeve, a base, and a cable guard. The mounting sleeve has a water inlet and a wiring hole, and a groove on its outer wall. An outer sleeve is fitted over the outer side of the mounting sleeve, with the inner wall of the outer sleeve and the groove wall forming a water channel. This invention features an oil injection pipe on the mounting sleeve and a water channel on the outer side of the mounting sleeve communicating with the water inlet and outlet, allowing for both lubrication during maintenance and water cooling during use. However, the opening of the oil injection pipe is located at one end of the handle with a fixing hole, which can easily lead to oil leakage.

[0005] Chinese patent application CN213525341U discloses a surgical semi-ring saw, including a handle with a water injection hole, a connection hole on the handle, a second stage on the handle, a connection hole in the middle of the second stage, a water injection hole on the stepped surface of the second stage, and a water injection pipe on the handle communicating with the water injection hole. This handle has a water-cooling function, but it is inconvenient to add lubricating oil to the motor inside the handle.

[0006] A Chinese patent application with publication number CN211325359U discloses a water-cooled surgical power handle, including a motor. A housing assembly is provided on the outside of the motor. The housing assembly includes an inner housing and an outer housing. A cooling water tank is provided on the outer wall of the inner housing. The cooling water tank has two notches on the inner housing. The cooling water tank and the inner wall of the outer housing form a cooling water channel. The two notches are respectively connected to an inlet pipe and an outlet pipe that pass through an end baffle. This can cool the inner housing and the outer housing and ensure that the outer housing is kept at a low temperature. However, it is inconvenient to add lubricating oil to the motor inside the handle.

[0007] There is an urgent need in the market for a handle that can be adapted to the cutting head, drive the cutting head to rotate, has water cooling, and is easy to replenish with lubricating oil without leakage. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the purpose of this invention is to provide a drive handle.

[0009] According to the present invention, a drive handle includes a handle housing and a motor. The motor is disposed inside the handle housing, the handle housing can be connected to a tool housing, and the output shaft of the motor can provide driving force to the tool.

[0010] According to the present invention, a drive handle includes a handle housing and a motor. The motor is disposed inside the handle housing. The handle housing is provided with a water injection channel. One axial end of the handle housing is provided with a water injection connection port, and the other axial end of the handle housing is provided with a water outlet. The water outlet can communicate with the water injection channel on the docked cutting tool.

[0011] Preferably, the water injection channel is integrated inside the handle housing, which includes a protective shell and a water cooling jacket. The protective shell is fitted over the water cooling jacket, and a water injection channel is formed between the protective shell and the water cooling jacket.

[0012] According to the present invention, a drive handle includes a handle housing and a motor. The motor is disposed inside the handle housing and includes a stator and a rotor. The rotor is disposed in the middle of the stator and a rotational clearance is formed between the rotor and the stator. The rotor is fixedly connected to the output shaft of the motor.

[0013] The handle housing is also provided with an oil injection channel, which is connected to the rotational gap between the stator and the rotor, and the oil injection port of the oil injection channel is located on the radial side of the handle housing.

[0014] Preferably, the oil injection channel includes a radial oil injection groove and an axial oil injection pipe, the radial oil injection groove and the axial oil injection pipe are connected, the axial oil injection pipe is connected to the rotational gap between the stator and the rotor, the radial oil injection groove has an oil injection port formed on the radial side wall of the handle housing, and an oil seal assembly for closing or opening the oil injection port is provided in the radial oil injection groove.

[0015] Preferably, the oil seal assembly includes a compression spring and a movable member. The compression spring is disposed on the side of the radial oil filling groove away from the oil filling port, and the movable member is disposed between the compression spring and the oil filling port, with the end of the movable member near the oil filling port being a ball head.

[0016] Preferably, the inner surface of the oil inlet that contacts the ball head of the movable part is an arc surface.

[0017] Preferably, a fixed seat is provided inside the handle housing, the radial oil injection groove is disposed inside the fixed seat, one end of the axial oil injection pipe is positioned and connected to the fixed seat, and the other end of the axial oil injection pipe is positioned and connected to the stator.

[0018] Preferably, the front end of the handle housing is an output end, and the front end of the handle housing is provided with a connector and a positioning sleeve, wherein the connector is fixedly connected to the handle housing;

[0019] The positioning sleeve is fixedly disposed inside the connector, and the positioning sleeve is positioned and connected to the positioning structure on the tool.

[0020] The output shaft of the motor is located inside the positioning sleeve, and the output shaft of the motor can provide driving force for the tool;

[0021] A signal terminal is provided at the rear end of the handle housing, and the signal terminal is electrically connected to the motor.

[0022] Preferably, a positioning block is provided inside the positioning sleeve, and a stop groove is provided on the outer wall of the connecting sleeve head that cooperates with the positioning sleeve; the connecting sleeve head extends into the positioning sleeve, and the positioning block enters the stop groove from the opening of the stop groove and can be screwed into the stop groove to form an axial limit; when the positioning block moves to the limit position in the stop groove, force feedback is generated, and the feedback can be output by the connecting sleeve head and / or the positioning sleeve.

[0023] Preferably, the positioning sleeve is capable of elastic deformation.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention utilizes the elasticity of a compression spring. When external pressure is applied to the ball head of the moving part, the compression spring contracts under the force to open the oil inlet. When the external pressure is removed, the compression spring returns to its original position to close the oil inlet, thus achieving a seal on the oil inlet. This helps prevent lubricating oil from leaking from the oil inlet and improves the user experience.

[0026] 2. The present invention, through the combination of ball head and arc surface, helps to improve the sealing effect on the oil injection port.

[0027] 3. This invention cools the motor through a water injection channel. The water injection channel on the drive handle can be connected to the water injection channel on the cutting tool, so that the drive handle motor, the transmission components on the cutting tool, and the cutting head can be cooled by a single water injection.

[0028] 4. The present invention can be detachably connected to the cutting tool via the drive handle, allowing for the replacement of cutting tools with different functions for different situations, which helps to improve the ease of use.

[0029] 5. This invention generates force feedback when the positioning block moves to the limit position in the stop groove, which makes it easier for users to feel the force feedback signal, thereby confirming the locking and improving the user experience.

[0030] 6. The present invention helps to prevent liquid from entering the oil filling channel from the oil filling port by placing the oil filling port on the radial side of the handle housing away from the water filling port located at the axial rear end of the handle housing. Attached Figure Description

[0031] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 is a schematic diagram of the overall structure of the drive handle in Embodiment 1 of the present invention;

[0033] Figure 2 is a cross-sectional view of the overall structure of the drive handle in Embodiment 2 of the present invention;

[0034] Figure 3 is a schematic diagram of the positioning sleeve structure in Embodiment 2 of the present invention;

[0035] Figure 4 is a schematic diagram of the overall structure of the connecting sleeve in Embodiment 2 of the present invention;

[0036] Figure 5 is a cross-sectional view of the overall structure of the oil injection channel in Embodiment 2 of the present invention.

[0037] The following components are shown in the figure: stator 1001, rotor 1002, protective shell 1003, water cooling jacket 1004, rear cover 1005, water inlet 1006, signal terminal 1008, connector 1009, positioning sleeve 1010, positioning block 1011, radial oil inlet groove 1012, axial oil inlet pipe 1013, oil inlet 1014, compression spring 1015, moving part 1016, ball head 1017, arc surface 1018, fixed seat 1019, hollow groove 1020, connecting sleeve 1021, stop groove 1022, and stop point 1023. Detailed Implementation

[0038] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0039] Example 1

[0040] Referring to Figure 1, a drive handle according to the present invention includes a handle housing and a motor. The motor is disposed inside the handle housing, and the handle housing can be connected to a tool housing. The output shaft of the motor can provide driving force to the tool. Specifically, the drive handle of the present application can be detachably connected to the tool, providing rotational driving force for different tools and improving the flexibility of the drive handle in use.

[0041] The cutting tools described in this embodiment include, but are not limited to, surgical tools such as bone cutters, sharpening knives, drills, saws, and planers. In a preferred embodiment, the drive handle of this application may also integrate a water injection channel internally. The water injection channel on the drive handle can communicate with the water injection channel on the cutting tool, enabling the cooling of the drive handle motor, the transmission components on the cutting tool, and the cutting head through a single water injection.

[0042] Example 2

[0043] Based on Embodiment 1, please refer to Figures 1 to 5. According to the present invention, a drive handle includes a handle housing and a motor. The motor is disposed inside the handle housing. The motor includes a stator 1001 and a rotor 1002. The rotor 1002 is disposed in the middle of the stator 1001. A rotational gap is formed between the rotor 1002 and the stator 1001. The rotor 1002 is fixedly connected to the output shaft of the motor.

[0044] The front end of the handle housing is the output end, and a water injection channel is provided on the handle housing. A water injection connection port 1006 is provided at one axial end of the handle housing, and a water outlet is provided at the other axial end of the handle housing. The water outlet can communicate with the water injection channel on the connected cutting tool. Specifically, the handle housing includes a protective shell 1003, a water cooling jacket 1004, and a rear cover 1005. The protective shell 1003 is fitted over the water cooling jacket 1004, and a water injection channel is formed between the protective shell 1003 and the water cooling jacket 1004. The rear cover 1005 is fixedly installed at the rear end of the protective shell 1003 and the water cooling jacket 1004. The rear cover 1005 is provided with a water injection connection port 1006, which communicates with the water injection channel. The front end of the handle housing has a water outlet for the water injection channel, which can communicate with the water injection channel on the cutting tool. During operation, the water inlet channel inside the handle housing can be connected to an external water source through the water inlet port 1006 to cool the motor. Furthermore, the water outlet at the front end of the handle housing can be connected to the water inlet channel on the cutting tool to cool the transmission components and cutting head on the cutting tool.

[0045] It should be noted that the water injection channel between the protective shell 1003 and the water cooling jacket 1004 in this application can be a straight channel or a spiral channel, preferably a spiral channel. The spiral channel can be realized by setting a spiral groove on the outer wall of the water cooling jacket 1004.

[0046] Furthermore, a signal terminal 1008 is provided on the rear cover 1005. The signal terminal 1008 is electrically connected to the motor. Through the signal terminal 1008 on the rear cover 1005, it can be electrically connected to external devices to control the motor. For example, the motor can be controlled by a foot pedal.

[0047] As shown in Figures 3 and 4, the front end of the handle housing is the output end. A connector 1009 and a positioning sleeve 1010 are provided at the front end of the handle housing. The connector 1009 is fixedly connected to the handle housing, and the positioning sleeve 1010 is fixedly disposed inside the connector 1009. The positioning sleeve 1010 is positioned and connected to the positioning structure on the tool. The output shaft of the motor is disposed inside the positioning sleeve 1010, and the output shaft of the motor can provide driving force to the tool. In one feasible embodiment, the positioning structure on the tool is a connecting sleeve 1021. A positioning block 1011 is provided inside the positioning sleeve 1010, and a stop groove 1022 is provided on the outer wall of the connecting sleeve 1021 that cooperates with the positioning sleeve 1010. Specifically, both the positioning sleeve 1010 and the connecting sleeve 1021 are cylindrical, and the connecting sleeve 1021 extends into the positioning sleeve 1010. The stop groove 1022 includes an axial opening and a limiting portion extending circumferentially along the connecting sleeve 1021. The end of the limiting portion has a slightly recessed stop point 1023. The positioning block 1011 enters the stop groove 1022 through the opening and can be screwed into the stop groove 1022 along the direction of the limiting portion to reach the stop point 1023 and form an axial limit. During contact connection, rotating the connecting sleeve 1021 causes the positioning block 1011 to move along the direction of the limiting portion to the axial opening of the stop groove 1022, and then the connecting sleeve 1021 and the positioning sleeve 1010 are separated axially.

[0048] In a preferred embodiment: the positioning blocks 1011 are provided in two opposing sets within the positioning sleeve 1010, which helps to improve the stability of the connection.

[0049] It should be noted that when the positioning block 1011 moves to the limit position within the stop groove 1022, force-position feedback is generated and output by the connecting sleeve 1021 and / or the positioning sleeve 1010. Specifically, the limit position is a stop point 1023 with a slight indentation at the end of the limiting part. When the positioning block 1011 moves into the stop point 1023, the stop point 1023 locks the positioning block 1011. At the instant the positioning block 1011 is locked by the stop point 1023, the force change is obvious, i.e., force-position feedback is generated. This force-position feedback information can be output through the connecting sleeve 1021 and / or the positioning sleeve 1010, allowing the user to feel the force change when the positioning block 1011 is locked by the stop point 1023. Furthermore, in order to enhance the user's experience of force feedback, the positioning sleeve 1010 can be designed to have a certain deformation capability. At the moment when the force changes, the deformation of the positioning sleeve 1010 can make it easier for the user to feel the force feedback signal, thereby confirming the locking and improving the user experience.

[0050] In another preferred embodiment: To improve gear feedback, the positioning sleeve 1010 of this application can generate elastic deformation and has elastic warning. Specifically, the positioning sleeve 1010 of this application is made of metal. In order to enhance the elastic deformation capability of the metal positioning sleeve 1010, the technical solution of this application provides a hollow groove 1020 or a disc spring structure on the side wall of the positioning sleeve 1010. Further, taking the hollow groove 1020 as an example, multiple hollow grooves 1020 are provided at intervals along the axial direction of the positioning sleeve 1010. It should be further noted that the technical solution of this application does not specifically limit the shape of the hollowed-out groove 1020. The shape of the hollowed-out groove 1020 can be an annular shape with a notch or a spiral shape. This application preferably uses an annular hollowed-out groove 1020 with a notch. For example, Figure 3 uses three annular hollowed-out grooves 1020 with notches. Each hollowed-out groove 1020 includes two opposing notches, and the notches of the three hollowed-out grooves 1020 do not completely coincide on the axis of the positioning sleeve 1010. It should also be noted that the notches in the annular hollowed-out grooves 1020 with notches described in this application are solid structures, ensuring the integrity of the positioning sleeve 1010. Moreover, the notches in the annular hollowed-out grooves 1020 are more likely to generate elastic deformation, which helps to enhance the elastic deformation capability of the positioning sleeve 1010.

[0051] The handle housing also includes an oil injection channel that communicates with the rotational clearance between the stator 1001 and the rotor 1002. The oil injection port 1014 of the oil injection channel is located on the radial side of the handle housing. This port is located away from the water inlet 1006 located at the axial rear end of the handle housing, which helps prevent liquid from entering the oil injection channel through the port 1014. The oil injection channel includes a radial oil injection groove 1012 and an axial oil injection pipe 1013. The radial oil injection groove 1012 and the axial oil injection pipe 1013 communicate with each other. The axial oil injection pipe 1013 communicates with the rotational clearance between the stator 1001 and the rotor 1002. The radial oil injection groove 1012 forms the oil injection port 1014 on the side wall of the handle housing, and an oil seal assembly for closing or opening the oil injection port 1014 is provided within the radial oil injection groove 1012. Using an oil seal assembly to control the opening and closing of the oil inlet 1014 can prevent lubricating oil from leaking out of the oil inlet 1014.

[0052] Specifically, the oil seal assembly includes a compression spring and a movable member 1016. The compression spring 1015 is disposed within the radial oil filling groove 1012 on the side away from the oil filling port 1014. The movable member 1016 is disposed between the compression spring 1015 and the oil filling port 1014, and the end of the movable member 1016 near the oil filling port 1014 is a ball head 1017. Utilizing the elasticity of the compression spring 1015, when external pressure is applied to the ball head 1017 of the movable member 1016, the compression spring 1015 contracts under the action of force, opening the oil filling port 1014. When the external pressure is removed, the compression spring 1015 returns to its original position, closing the oil filling port 1014. In a preferred embodiment, the inner surface of the oil filling port 1014 that contacts the ball head 1017 of the movable member 1016 is an arc surface 1018, which helps to improve the sealing effect on the oil filling port 1014.

[0053] In one feasible embodiment, a fixing base 1019 is provided inside the handle housing, a radial oil injection groove 1012 is disposed inside the fixing base 1019, one end of the axial oil injection pipe 1013 is positioned and connected to the fixing base 1019, and the other end of the axial oil injection pipe 1013 is positioned and connected to the stator 1001. Both the water injection port 1006 and the signal terminal 1008 extend into the interior of the fixing base 1019.

[0054] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A drive handle, characterized in that, It includes a handle housing and a motor, the motor being disposed inside the handle housing, the handle housing being able to connect to the tool housing, and the output shaft of the motor being able to provide driving force to the tool.

2. A drive handle, characterized in that, The device includes a handle housing and a motor. The motor is located inside the handle housing. The handle housing has a water injection channel. One axial end of the handle housing has a water injection port, and the other axial end of the handle housing has a water outlet. The water outlet can communicate with the water injection channel on the connected cutting tool.

3. The drive handle as described in claim 2, characterized in that, The water injection channel is integrated inside the handle housing. The handle housing includes a protective shell and a water cooling jacket. The protective shell is fitted over the water cooling jacket, and a water injection channel is formed between the protective shell and the water cooling jacket.

4. A drive handle, characterized in that, The device includes a handle housing and a motor. The motor is located inside the handle housing and includes a stator and a rotor. The rotor is located in the middle of the stator and a rotational clearance is formed between the rotor and the stator. The rotor is fixedly connected to the output shaft of the motor. The handle housing is also provided with an oil injection channel, which is connected to the rotational gap between the stator and the rotor, and the oil injection port of the oil injection channel is located on the radial side of the handle housing.

5. The drive handle as described in claim 4, characterized in that, The oil injection channel includes a radial oil injection groove and an axial oil injection pipe. The radial oil injection groove and the axial oil injection pipe are connected. The axial oil injection pipe is connected to the rotational gap between the stator and the rotor. The radial oil injection groove has an oil injection port formed on the radial side wall of the handle housing. An oil seal assembly for closing or opening the oil injection port is provided in the radial oil injection groove.

6. The drive handle as described in claim 5, characterized in that, The oil seal assembly includes a compression spring and a movable member. The compression spring is disposed on the side away from the oil inlet in the radial oil inlet groove. The movable member is disposed between the compression spring and the oil inlet, and the end of the movable member near the oil inlet is a ball head.

7. The drive handle as described in claim 6, characterized in that, The inner surface of the oil inlet that contacts the ball head of the movable part is an arc surface.

8. The drive handle as described in claim 5, characterized in that, A fixed seat is provided inside the handle housing, the radial oil injection groove is disposed inside the fixed seat, one end of the axial oil injection pipe is positioned and connected to the fixed seat, and the other end of the axial oil injection pipe is positioned and connected to the stator.

9. The drive handle as described in any one of claims 1, 2, and 4, characterized in that, The front end of the handle housing is the output end, and the front end of the handle housing is provided with a connector and a positioning sleeve, and the connector is fixedly connected to the handle housing; The positioning sleeve is fixedly disposed inside the connector, and the positioning sleeve is positioned and connected to the positioning structure on the tool. The output shaft of the motor is located inside the positioning sleeve, and the output shaft of the motor can provide driving force for the tool; A signal terminal is provided at the rear end of the handle housing, and the signal terminal is electrically connected to the motor.

10. The drive handle as described in claim 9, characterized in that, The positioning sleeve is provided with a positioning block, and the outer wall of the connecting sleeve head that mates with the positioning sleeve is provided with a stop groove. The connecting sleeve extends into the positioning sleeve, and the positioning block enters the positioning groove from the opening of the positioning groove and can be screwed into the positioning groove to form an axial limit. When the positioning block moves to the limit position in the stop groove, it generates force and position feedback, which can be output by the connecting sleeve and / or positioning sleeve.

11. The drive handle as claimed in claim 10, characterized in that, The positioning sleeve is capable of elastic deformation.

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