Handle assembly of abrasive drilling device and abrasive drilling device

Abstract

The invention discloses a handle assembly of an abrasive drilling device and the abrasive drilling device, and relates to the technical field of medical instruments.The handle assembly of the abrasive drilling device comprises a first handle and a second handle, the second handle comprises a second shell; the elbow assembly comprises an elbow body and a connecting sleeve, the elbow body is fixed to the second shell and provided with a first channel, one end of the connecting sleeve is movably connected with the elbow body, the connecting sleeve can rotate around the axis of the connecting sleeve and is relatively fixed to the axial position of the elbow body, and the other end of the connecting sleeve is in threaded connection with the first shell; one end of the isolation sleeve is fixed in the first channel, the other end of the isolation sleeve extends in the direction close to the first handle and covers the movable connecting position of the connecting sleeve and the elbow body, and the isolation sleeve is further provided with an axially-through second channel; and the wire is led out from the first shell, penetrates through the first channel and the second channel and extends into the second shell. According to the technical scheme provided by the invention, the risk that the wire is extruded and damaged is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a handle assembly and a grinding device for a grinding apparatus. Background Technology

[0002] In modern surgery, grinding and drilling devices are widely used for grinding, drilling, shaping, and removing bone or diseased tissue. A typical grinding and drilling device includes a first handle and a second handle. The first handle houses a drive assembly, and the second handle houses a transmission assembly. The outer shells of the first and second handles are fixedly connected. The second handle is used to mount the grinding and drilling tools. The drive assembly is connected to the grinding and drilling tools via the transmission assembly, thereby transmitting the rotational power of the drive assembly to the grinding and drilling tools to achieve functions such as grinding or drilling.

[0003] A grinding device is available. To adapt to complex operating spaces or achieve specific surgical angles, the housing of its second handle has an elbow near the end of the first handle. The elbow is threadedly connected to the housing of the first handle to assemble the second handle with the first handle. A transmission component inside the elbow connects the drive component and the grinding tool, changing the direction of power transmission. This causes the grinding tool to form a certain angle with the first handle, allowing the grinding tool to enter hard-to-reach areas at a specific angle. Furthermore, a wire is installed inside the grinding device, extending from the inside of the first handle, through the inside of the second handle, and to the grinding tool. This wire is used for tool identification and button control on the second handle to start and stop the drive component.

[0004] Because the wire passes through the inside of the first handle and then into the inside of the second handle, the wire can easily get caught between the first and second handles during the assembly process, causing the wire to be squeezed and damaged. Summary of the Invention

[0005] The main objective of this invention is to provide a handle assembly and a grinding device for a grinding apparatus, which aims to reduce the risk of wires being crushed and damaged.

[0006] To achieve the above objectives, the present invention provides a handle assembly for a grinding drill, comprising:

[0007] The first handle includes a first housing;

[0008] The second handle includes a second housing;

[0009] An elbow assembly includes an elbow body and a connecting sleeve. The elbow body is fixed to a second housing and has a first channel. One end of the connecting sleeve is movably connected to the elbow body and is rotatable around its own axis and is fixed relative to the axial position of the elbow body. The other end of the connecting sleeve is threadedly connected to the first housing so that the second housing is fixed to the first housing through the elbow body and the connecting sleeve.

[0010] An isolation sleeve, one end of which is fixed inside the first channel, and the other end extending towards the first handle and covering the movable connection between the connecting sleeve and the elbow body; the isolation sleeve also has an axially penetrating second channel; and

[0011] A wire extends from the first housing, passes through the first channel and the second channel, and extends into the interior of the second housing.

[0012] In one embodiment, the first housing is provided with a cable outlet groove, and the wire is led out from the cable outlet groove.

[0013] In one embodiment, the cable outlet groove extends radially through the first housing, and one end of the connecting sleeve that is threadedly connected to the first housing is sleeved on the outside of the first housing.

[0014] In one embodiment, the inner wall of the first channel is provided with a first wire guide groove, and the wire is at least partially housed in the first wire guide groove; and / or,

[0015] The inner wall of the second channel is provided with a second wire guide groove, and the wire is at least partially housed in the second wire guide groove.

[0016] In one embodiment, the first handle further includes:

[0017] A drive assembly includes a drive motor and a drive gear connected to the drive motor. The drive motor is disposed inside the first housing, and the drive gear is rotatably disposed inside the second channel.

[0018] A support sleeve, one end of which is fitted inside the first housing, and the other end extends into the second channel and is fitted outside the drive assembly. The wire is located on the side of the support sleeve opposite to the drive assembly.

[0019] In one embodiment, there is a gap between the outer wall of the isolation sleeve at the end closest to the first housing and the inner wall of the first channel, the gap forming a snap-fit ​​groove, and the connecting sleeve is partially disposed in the snap-fit ​​groove to realize the movable connection between the connecting sleeve and the elbow body.

[0020] In one embodiment, the elbow assembly further includes a first limiting structure, which connects the elbow body and the connecting sleeve, or the first limiting structure connects the isolation sleeve and the connecting sleeve, to prevent the connecting sleeve from leaving the snap ring groove.

[0021] In one embodiment, the isolation sleeve is threadedly connected to the elbow body, and the first channel is provided with a limiting step surface that abuts against the isolation sleeve.

[0022] In one embodiment, the elbow assembly further includes a positioning structure that connects the isolation sleeve and the first housing to prevent the isolation sleeve from rotating relative to the first housing.

[0023] The present invention also proposes a drill grinding device, including the handle assembly of the drill grinding device described above.

[0024] The handle assembly of the grinding device in this invention includes a first handle, a second handle, a wire, an elbow assembly, and an isolation sleeve. The first handle includes a first housing, the second handle includes a second housing, and the elbow assembly includes an elbow body and a connecting sleeve. The elbow body is mounted on the second housing, and the connecting sleeve is movably connected to the elbow body, allowing the connecting sleeve to rotate relative to the elbow body and also drive the elbow body to move axially. The connecting sleeve is threadedly connected to the first housing, thus achieving a detachable connection between the first and second handles. During assembly, tightening the thread between the connecting sleeve and the first housing allows the connecting sleeve to rotate independently without causing the elbow body to rotate; it only causes the elbow body to move axially closer to the first handle, securing the elbow body firmly to the first handle. Conversely, during disassembly, the connecting sleeve can also rotate independently without causing the elbow body to rotate, thereby preventing the elbow body from causing the wire in the second channel to twist and reducing the risk of wire torsion damage. On the other hand, when the first handle and the second handle are connected, the wire is passed through the first channel of the isolation sleeve. The connecting sleeve is movably connected to the elbow body and threadedly connected to the first housing outside the isolation sleeve. This makes the wire blocked inside by the isolation sleeve, which makes it less likely for the wire to be caught between the first handle and the second handle. This reduces the risk of the wire being squeezed and damaged, and improves the reliability and safety of the handle assembly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1A cross-sectional view of a partial structure of an embodiment of the handle assembly of the grinding device provided by the present invention. Figure 1 ;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0029] Figure 4 A cross-sectional view of a partial structure of an embodiment of the handle assembly of the grinding device provided by the present invention. Figure 2 ;

[0030] Figure 5 A cross-sectional view of a partial structure of an embodiment of the handle assembly of the grinding device provided by the present invention. Figure 3 ;

[0031] Figure 6 A schematic diagram of the structure of the isolation sleeve of the handle assembly of the grinding device provided by the present invention;

[0032] Figure 7 A schematic diagram of a portion of the handle assembly of the grinding device provided by the present invention;

[0033] Figure 8 A partial cross-sectional view of a portion of the structure of the handle assembly of the grinding device provided by the present invention;

[0034] Figure 9 A schematic diagram of the structure of the elbow body of the elbow assembly of the handle assembly of the grinding device provided by the present invention;

[0035] Figure 10 A schematic diagram of the fastener of the second limiting structure of the handle assembly of the grinding device provided by the present invention;

[0036] Figure 11 This is a cross-sectional view of a partial structure of an embodiment of the grinding and drilling apparatus provided by the present invention.

[0037] Explanation of icon numbers:

[0038] 100. First handle; 110. First housing; 1101. Positioning groove; 1102. Cable outlet groove; 120. Drive assembly; 121. Drive gear; 122. Drive motor; 130. Wire; 140. Support sleeve;

[0039] 200, Elbow assembly; 201, Assembly channel; 202, Snap-fit ​​ring groove; 203, Positioning structure; 204, First limiting structure; 210, Elbow body; 2101, First wire guide groove; 220, Connecting sleeve; 221, First protrusion;

[0040] 300. Isolation sleeve; 301. Positioning protrusion; 302. Second protrusion;

[0041] 410. Driven gear; 411. Hub; 412. Gear teeth; 420. Bearing; 430. Limiting element;

[0042] 500. Adjustment structure; 510. Adjustment pad;

[0043] 600. Second limiting structure; 610. Fastener; 611. Wrench groove;

[0044] 700, Second handle; 710, Second housing.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, or a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] This invention proposes a handle assembly for a drilling device.

[0051] Please see Figure 1 , Figure 2 , Figure 5 as well as Figure 11 , Figure 1 A cross-sectional view of a partial structure of an embodiment of the handle assembly of the grinding device provided by the present invention. Figure 1 , Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 5 A cross-sectional view of a partial structure of an embodiment of the handle assembly of the grinding device provided by the present invention. Figure 3 , Figure 11 This is a cross-sectional view of a partial structure of an embodiment of the grinding and drilling apparatus provided by the present invention.

[0052] In one embodiment of the present invention, the handle assembly of the grinding device includes:

[0053] The first handle 100 includes a first housing 110;

[0054] The second handle 700 includes a second housing 710;

[0055] Elbow assembly 200 includes elbow body 210 and connecting sleeve 220. Elbow body 210 is fixed to second housing 710 and has a first channel. One end of connecting sleeve 220 is movably connected to elbow body 210 and can rotate around its own axis and is relatively fixed to the axial position of elbow body 210. The other end of connecting sleeve 220 is threadedly connected to first housing 110 so that second housing 710 is fixed to first housing 110 through elbow body 210 and connecting sleeve 220.

[0056] An isolation sleeve 300 has one end fixed inside the first channel and the other end extending towards the first handle 100, covering the movable connection between the connecting sleeve 220 and the elbow body 210. The isolation sleeve 300 also has an axially penetrating second channel.

[0057] The wire 130 extends from the first housing 110, passes through the first channel and the second channel, and extends into the interior of the second housing 710.

[0058] The handle assembly of the grinding device in the technical solution of the present invention includes a first handle 100, a second handle 700, a wire 130, an elbow assembly 200, and an isolation sleeve 300. The first handle 100 includes a first housing 110, the second handle 700 includes a second housing 710, and the elbow assembly 200 includes an elbow body 210 and a connecting sleeve 220. The elbow body 210 is mounted on the second housing 710, and the connecting sleeve 220 is movably connected to the elbow body 210, so that the connecting sleeve 220 can rotate relative to the elbow body 210 and drive the elbow body 210 to move axially. The connecting sleeve 220 is threadedly connected to the first housing 110, thereby realizing the detachable connection between the first handle 100 and the second handle 700. During assembly, tightening the threads between the connecting sleeve 220 and the first housing 110 allows the connecting sleeve 220 to rotate independently without causing the elbow body 210 to rotate. Instead, it causes the elbow body 210 to move axially closer to the first handle 100, thus securing the elbow body 210 to the first handle 100. Conversely, during disassembly, the connecting sleeve 220 can also rotate independently without causing the elbow body 210 to rotate, thereby preventing the elbow body 210 from causing the wire 130 in the second channel to twist and reducing the risk of torsion damage to the wire 130. On the other hand, when the first handle 100 and the second handle 700 are connected, the wire 130 is inserted inside the first channel of the isolation sleeve 300. The connecting sleeve 220 is movably connected to the elbow body 210 and threadedly connected to the first housing 110 outside the isolation sleeve 300, so that the wire 130 is blocked inside by the isolation sleeve 300, making it less likely that the wire 130 will be trapped between the first handle 100 and the second handle 700, thereby reducing the risk of the wire 130 being squeezed and damaged, and improving the reliability and safety of the handle assembly.

[0059] Reference Figure 2 Specifically, in this embodiment, the end of the first channel of the isolation sleeve 300 facing the first handle 100 is provided with a chamfer or rounded corner, so that the wire 130 is not easily scratched by the sharp edge of the isolation sleeve 300 after it passes through the first housing 110 into the isolation sleeve 300.

[0060] In one embodiment, the first housing 110 is provided with a wire outlet groove 1102, and the wire 130 is led out from the wire outlet groove 1102.

[0061] Reference Figure 2 and Figure 7 In an embodiment of the present invention, the first housing 110 is provided with a wire outlet groove 1102 extending along its own axial direction. The first channel and the second channel are connected to form an assembly channel 201. The wire 130 is led out from the wire outlet groove 1102 and passes through the assembly channel 201. The wire outlet groove 1102 limits the wire 130, restricting the position and extension direction of the wire 130, thereby reducing the risk of the wire 130 being squeezed due to displacement or shaking during the assembly process.

[0062] In one embodiment, the cable outlet groove 1102 radially penetrates the first housing 110, and one end of the connecting sleeve 220, which is threadedly connected to the first housing 110, is sleeved on the outside of the first housing 110.

[0063] Reference Figure 1 and Figure 2 In an embodiment of the present invention, the cable outlet groove 1102 extends radially through the first housing 110, reducing the processing difficulty of the cable outlet groove 1102. At the same time, the first housing 110 is provided with an external thread at one end near the connecting sleeve 220, and the connecting sleeve 220 is provided with an internal thread at one end near the first housing 110. The connecting sleeve 220 is fitted onto the outside of the first housing 110 and threaded together. The connecting sleeve 220 is located outside the first housing 110, reducing the risk of the connecting sleeve 220 squeezing the wire 130 when it is assembled with the first housing 110.

[0064] In one embodiment, the inner wall of the first channel is provided with a first wire guide groove 2101, and the wire 130 is at least partially received in the first wire guide groove 2101; and / or,

[0065] The inner wall of the second channel is provided with a second wire guide groove (not shown in the figure), and the wire 130 is at least partially housed in the second wire guide groove.

[0066] Combination Figure 1 and Figure 9 In an embodiment of the present invention, the inner wall of the first channel is provided with a first wire passage groove 2101. The first wire passage groove 2101 provides a preset path for the wire 130, which facilitates the quick positioning of the wire 130 in the elbow body 210, improves the convenience of assembling the wire 130, and the wire 130 housed in the first wire passage groove 2101 is less likely to interfere with other components in the first channel, further reducing the risk of damage to the wire 130.

[0067] In an embodiment of the present invention, the inner wall of the second channel is provided with a second wire passage groove, which provides a preset path for the wire 130, making it convenient for the wire 130 to be quickly positioned in the elbow body 210, improving the convenience of assembling the wire 130, and the wire 130 housed in the second wire passage groove is less likely to interfere with other components in the second channel, further reducing the risk of damage to the wire 130.

[0068] In one embodiment, the first handle 100 further includes:

[0069] Drive assembly 120 includes a drive motor 122 and a drive gear 121 connected to the drive motor 122. The drive motor 122 is located inside the first housing 110, and the drive gear 121 is rotatably located inside the second channel.

[0070] The support sleeve 140 has one end fitted inside the first housing 110 and the other end extending into the second channel and fitted outside the drive assembly 120. The wire 130 is located on the side of the support sleeve 140 away from the drive assembly 120.

[0071] Reference Figure 1 , Figure 2 and Figure 7 In one embodiment of the present invention, the first handle 100 further includes a drive assembly 120 and a support sleeve 140. The drive assembly 120 includes a drive motor 122 and a drive gear 121. One end of the support sleeve 140 is located between the drive motor 122 and the first housing 110, and the other end extends into the interior of the assembly channel 201 and is sleeved on the exterior of the drive gear 121. The wire 130 is located on the side of the support sleeve 140 away from the drive gear 121. The support sleeve 140 separates the drive gear 121 and the wire 130, avoiding interference between the drive gear 121 and the wire 130, thereby reducing the risk of damage to the drive gear 121 and the wire 130.

[0072] In one embodiment, the outer wall of the isolation sleeve 300 at the end closest to the first housing 110 is spaced from the inner wall of the first channel, forming a snap-fit ​​groove 202. The connecting sleeve 220 is partially disposed in the snap-fit ​​groove 202 to realize the movable connection between the connecting sleeve 220 and the elbow body 210.

[0073] Reference Figure 1 , Figure 2 , Figure 4 as well as Figure 5In an embodiment of the present invention, the first end of the isolation sleeve 300 is fixed to the inner wall of the first channel, which can be achieved by means of threaded connection or welding, to ensure that the isolation sleeve 300 and the elbow body 210 are firmly fixed, and the second channel is connected to the first channel to form an assembly channel 201. The second end of the isolation sleeve 300 is spaced from the inner wall of the first channel of the elbow body 210, and this space forms a snap-fit ​​groove 202. The end of the connecting sleeve 220 near the elbow assembly 200 is disposed in the snap-fit ​​groove 202, so that the connecting sleeve 220 can rotate relative to the elbow body 210 and drive the elbow body 210 to move axially, thereby realizing the movable connection between the connecting sleeve 220 and the elbow body 210. The manufacturing difficulty of the snap ring groove 202 is reduced. When assembling with the connecting sleeve 220, one end of the connecting sleeve 220 located in the snap ring groove 202 can be placed in the first channel first, and then the first end of the isolation sleeve 300 can be connected to the inner wall of the first channel to form the snap ring groove 202, thereby reducing the assembly difficulty of the connecting sleeve 220 and the snap ring groove 202.

[0074] In one embodiment, the isolation sleeve 300 is threadedly connected to the elbow body 210, and the first channel is provided with a limiting step surface that abuts against the isolation sleeve 300.

[0075] Reference Figure 5 In this embodiment of the invention, the isolation sleeve 300 and the elbow body 210 are connected by threads, so that the isolation sleeve 300 is fixed inside the first channel of the elbow body 210, which is convenient to assemble and disassemble and securely fixed. A limiting step surface is provided on the inner wall of the first channel. The limiting step surface plays a positioning role for the isolation sleeve 300. When the isolation sleeve 300 is installed into the first channel, the isolation sleeve 300 abuts against the limiting step surface, ensuring that the isolation sleeve 300 is installed in place, guaranteeing the assembly accuracy of the isolation sleeve 300 and the elbow body 210, and improving the convenience of assembly.

[0076] In one embodiment, the elbow assembly 200 further includes a positioning structure 203, which connects the isolation sleeve 300 and the first housing 110 to prevent the isolation sleeve 300 from rotating relative to the first housing 110.

[0077] Combination Figure 1 and Figure 8In an embodiment of the present invention, the elbow assembly 200 further includes a positioning structure 203. The positioning structure 203 connects the isolation sleeve 300 and the first housing 110 using pins, keyways, or other means, preventing the isolation sleeve 300 from rotating relative to the first housing 110. This also prevents the entire elbow assembly 200 from rotating relative to the first housing 110, thus avoiding rotation of the isolation sleeve 300 and the elbow body 210 relative to the first housing 110 due to vibration or external force. Consequently, it prevents the wire 130 from being twisted, further reducing the risk of damage to the wire 130. Furthermore, during assembly and disassembly, since the elbow assembly 200 cannot rotate relative to the first housing 110, the user only needs to rotate the connecting sleeve 220, eliminating the need to hold the elbow assembly 200 with one hand and rotate the connecting sleeve 220 with the other, making the assembly and disassembly operations more convenient and faster.

[0078] In one embodiment, the positioning structure 203 includes a cooperating positioning protrusion 301 and a positioning groove 1101. One of the isolation sleeve 300 and the first housing 110 is provided with the positioning groove 1101, and the other of the isolation sleeve 300 and the first housing 110 is provided with the positioning protrusion 301. The positioning protrusion 301 is inserted into the positioning groove 1101 to prevent the isolation sleeve 300 from rotating relative to the first housing 110.

[0079] Combination Figures 6 to 8 In an embodiment of the present invention, the positioning structure 203 includes a cooperating positioning protrusion 301 and a positioning groove 1101. The positioning protrusion 301 can be provided at the end of the isolation sleeve 300 facing the first housing 110, and the positioning groove 1101 can be correspondingly provided at the end of the first housing 110 facing the isolation sleeve 300; conversely, the positioning groove 1101 can be provided at the end of the isolation sleeve 300 facing the first housing 110, and the positioning protrusion 301 can be correspondingly provided at the end of the first housing 110 facing the isolation sleeve 300. After the positioning protrusion 301 is inserted into the positioning groove 1101, the inner sidewall of the positioning groove 1101 contacts the outer sidewall of the positioning protrusion 301, preventing circumferential relative rotation between them. Axially, the positioning protrusion 301 can slide along the depth direction of the positioning groove 1101 without hindering the axial fastening function of the connecting sleeve 220. The design of the positioning protrusion 301 and the positioning groove 1101 is simple and easy to manufacture, which helps to reduce the manufacturing cost of the grinding and drilling device.

[0080] In one embodiment, the elbow assembly 200 further includes a first limiting structure 204, which connects the elbow body 210 and the connecting sleeve 220, or the first limiting structure 204 connects the isolation sleeve 300 and the connecting sleeve 220, so as to prevent the connecting sleeve 220 from leaving the snap ring groove 202.

[0081] Reference Figure 5In an embodiment of the present invention, the elbow assembly 200 further includes a first limiting structure 204, which prevents the connecting sleeve 220 from disengaging from the snap ring groove 202, thereby ensuring that the spirally rotating connecting sleeve 220 can drive the elbow assembly 200 to move axially. The first limiting structure 204 can be disposed between the connecting sleeve 220 and the elbow body 210, or between the connecting sleeve 220 and the isolation sleeve 300. By setting the first limiting structure 204, the reliability of the connection between the connecting sleeve 220 and the elbow assembly 200 is improved, ensuring that the connecting sleeve 220 can drive the elbow assembly 200 to move axially, and reducing the risk of separation between the connecting sleeve 220 and the elbow assembly 200 under vibration conditions. The first limiting structure 204 can be implemented in various structural forms. For example, it can be implemented by the cooperation of a limiting pin and an annular groove. The limiting pin and the annular groove are respectively set on the inner wall of the snap-fit ​​annular groove 202 and the outer wall of the connecting sleeve 220. After the connecting sleeve 220 is inserted into the snap-fit ​​annular groove 202, the limiting pin is embedded in the annular groove and can rotate around the annular groove circumferentially. This realizes the circumferential rotation of the connecting sleeve 220 relative to the elbow assembly 200 and restricts the axial movement of the connecting sleeve 220 relative to the elbow assembly 200. It can also be implemented by the cooperation of flanges. Alternatively, flanges can be set on the inner wall of the snap-fit ​​annular groove 202 and the outer wall of the connecting sleeve 220. After the connecting sleeve 220 is inserted into the snap-fit ​​annular groove 202, the flange on the inner wall of the snap-fit ​​annular groove 202 blocks the axial movement of the flange on the outer wall of the connecting sleeve 220, thereby restricting the axial movement of the connecting sleeve 220 relative to the elbow assembly 200.

[0082] In one embodiment, the first limiting structure 204 includes a first protrusion 221 and a second protrusion 302. The first protrusion 221 is disposed at one end of the connecting sleeve 220 inserted into the snap ring groove 202. The second protrusion 302 protrudes from the outer wall of the isolation sleeve 300 that is relatively close to the first housing 110. The end of the second protrusion 302 facing the inside of the snap ring groove 202 abuts against the first protrusion 221 to prevent the connecting sleeve 220 from leaving the snap ring groove 202.

[0083] Reference Figure 5 In an embodiment of the present invention, the first limiting structure 204 includes a first protrusion 221 and a second protrusion 302. The inner wall of one end of the connecting sleeve 220 that inserts into the snap-fit ​​groove 202 is provided with an annular boss to form the first protrusion 221. The outer wall of the second end of the isolation sleeve 300 is provided with an annular boss to form the second protrusion 302. When the connecting sleeve 220 is inserted into the snap-fit ​​groove 202, the second protrusion 302 reduces the opening size of the limiting groove, preventing the first protrusion 221 from leaving the limiting groove, thus preventing the connecting sleeve 220 from separating from the limiting groove. The first protrusion 221 and the second protrusion 302 have simple structures and can be directly machined on the isolation sleeve 300 and the connecting sleeve 220, which helps to ensure the strength of the first limiting structure 204 and also reduces the processing and assembly of additional parts.

[0084] In one embodiment, an angle is formed between the axial direction of the first handle 100 and the axial direction of the second handle 700.

[0085] Reference Figure 11 In an embodiment of the present invention, the second handle 700 is used to mount the grinding tool. The second handle 700 is connected to the first handle 100 via the elbow assembly 200 and the connecting sleeve 220 to form the handle of the grinding device. Because the elbow body 210 of the elbow assembly 200 is bent at a certain angle, there is a certain angle between the axial direction of the first handle 100 and the axial direction of the second handle 700, which makes it easier for the user to hold the handle and insert the grinding tool into some hard-to-reach surgical areas, improving the convenience of surgical operation.

[0086] In one embodiment, the drive assembly 120 includes a rotatably disposed drive gear 121, and the handle assembly of the grinding device further includes:

[0087] Driven gear 410 includes a toothed portion 412 and a hub portion 411. The hub portion 411 is rotatably disposed inside the assembly channel 201. The toothed portion 412 is disposed at the end of the hub portion 411 facing the driving gear 121 and meshes with the driving gear 121.

[0088] Bearing 420 is sleeved on the outside of hub portion 411 and fixed axially inside assembly channel 201; and

[0089] The adjusting structure 500 connects the hub 411 and the bearing 420, and is used to drive the hub 411 to move axially relative to the bearing 420 so that the gear tooth 412 moves closer to or away from the drive gear 121.

[0090] Reference Figure 1 and Figure 3In an embodiment of the present invention, the drive assembly 120 includes a drive motor 122 and a drive gear 121. The elbow assembly 200 is fixedly connected to the housing of the drive motor 122. The drive gear 121 is disposed on the output shaft of the drive motor 122, and the drive motor 122 drives the drive gear 121 to rotate. The grinding and drilling device also includes a driven gear 410, a bearing 420, and an adjustment structure 500. The driven gear 410 includes a toothed portion 412 and a hub portion 411. The hub portion 411 is rotatably disposed in the assembly channel 201 of the elbow assembly 200. The toothed portion 412 extends to the drive gear 121 and meshes with the drive gear 121. The bearing 420 is sleeved on the outside of the hub portion 411 and is axially fixed in the assembly channel 201 to form a stable support for the driven gear 410. The adjustment structure 500 connects the hub 411 and the bearing 420, and can drive the hub 411 to move axially relative to the bearing 420, thereby adjusting the gap between the gear tooth 412 and the drive gear 121, so that the drive gear 121 and the driven gear 410 mesh accurately. On the one hand, the ability to adjust the clearance between the driven gear 410 and the driving gear 121 improves the accuracy of their meshing, thereby ensuring the efficiency of power transmission, improving the stability and reliability of the transmission, and reducing the wear of the driving gear 121 and the driven gear 410, thus extending their service life. On the other hand, the driven gear 410, bearing 420, and adjustment structure 500 are mounted on the elbow assembly 200, which can be assembled separately from the drive assembly 120. Therefore, once the elbow assembly 200 and the drive assembly 120 are assembled, the meshing adjustment of the driven gear 410 and the driving gear 121 can be performed without assembling the entire grinding and drilling device. Fewer parts need to be disassembled during the adjustment process, thus improving the convenience of meshing adjustment of the driven gear 410 and the driving gear 121 and shortening the time spent on meshing adjustment. On the other hand, with the long-term use of the grinding and drilling device, the driving gear 121 and the driven gear 410 will wear due to meshing, resulting in an increase in meshing clearance. By adjusting the axial position of the driven gear 410 through the adjustment structure 500, the clearance caused by wear can be compensated, thereby reducing problems such as transmission vibration, noise and power loss caused by excessive clearance, and extending the service life of the grinding and drilling device.

[0091] In one embodiment, the adjustment structure 500 includes a cooperating adjustment pad 510 and a limiting groove. The limiting groove is circumferentially disposed on the outer peripheral wall of the hub portion 411. The bearing 420 is partially disposed in the limiting groove. The width of the limiting groove is greater than the width of the bearing 420. The adjustment pad 510 is disposed between the inner wall of the limiting groove and the bearing 420, and is located on the side of the bearing 420 facing the drive gear 121 and / or the side away from the drive gear 121, so that the gear tooth portion 412 is close to or away from the drive gear 121.

[0092] Combination Figure 1 and Figure 3 In an embodiment of the present invention, the adjusting structure 500 includes an adjusting pad 510 and a limiting groove. The limiting groove is circumferentially disposed on the outer peripheral wall of the hub portion 411 and is continuously arranged along the circumferential direction of the hub portion 411. The limiting groove provides a receiving space for the bearing 420 and the adjusting pad 510. The inner side of the bearing 420 is located within the limiting groove, and the outer side abuts against the inner wall of the assembly channel 201. The width of the limiting groove (the dimension along the axial direction of the hub portion 411) is greater than the width of the bearing 420 (the dimension along its own axial direction), resulting in an axial gap between the bearing 420 and the inner wall of the limiting groove, thereby providing space for the axial movement of the hub portion 411 relative to the bearing 420. The adjusting shim 510 is used to be set in the gap between the limiting groove and the bearing 420 to achieve axial positioning of the hub 411. The adjusting shim 510 can be set on the side of the bearing 420 facing the driving gear 121, that is, between the end face of the bearing 420 close to the driving gear 121 and the inner wall of the corresponding side of the limiting groove; it can also be set on the side away from the driving gear 121, that is, between the end face of the bearing 420 away from the driving gear 121 and the inner wall of the corresponding side of the limiting groove; or it can be set on both sides at the same time.

[0093] Specifically, when the gear teeth 412 need to be closer to the drive gear 121, an adjusting shim 510 can be added to the side of the bearing 420 facing the drive gear 121, or a thicker adjusting shim 510 can be used. The adjusting shim 510 will push the inner wall of the limiting groove towards the drive gear 121, thereby causing the hub 411 and gear teeth 412 to move closer to the drive gear 121. When the gear teeth 412 need to be away from the drive gear 121, an adjusting shim 510 can be added to the side of the bearing 420 away from the drive gear 121, or a thicker adjusting shim 510 can be used. The adjusting shim 510 will push the inner wall of the limiting groove away from the drive gear 121, thereby causing the hub 411 and gear teeth 412 to move away from the drive gear 121. The axial position of the driven gear 410 can be adjusted simply by adding, removing, or replacing adjusting shims 510 of different thicknesses. This method is inexpensive to manufacture, has a low operating threshold, and is simple, reliable, and easy to operate. The adjusting shim 510 can be in the form of a shim or washer, and its thickness, quantity and setting position can be adjusted and designed as needed to meet the axial displacement required by the hub 411.

[0094] In one embodiment, the hub portion 411 includes a first segment and a second segment connected together. The tooth portion 412 is disposed at the end of the first segment away from the second segment. The outer diameter of the second segment is smaller than the outer diameter of the first segment, and a first step structure is formed at the connection between the first segment and the second segment. The grinding device also includes a limiting member 430, which is sleeved on the outside of the second segment and spaced apart from the first step structure, so that a limiting groove is formed between the first step structure and the limiting member 430.

[0095] Combination Figure 1 and Figure 3 In an embodiment of the present invention, the hub portion 411 includes a first segment with a larger diameter and a second segment with a smaller diameter. The first segment and the second segment are coaxially connected. Since the outer diameter of the second segment is smaller than that of the first segment, a first step structure is formed at the connection between the first segment and the second segment. The grinding device also includes a limiting member 430. The limiting member 430 can be in the form of a retaining ring or a retaining ring, etc., and is sleeved on the outside of the second segment. There is an axial distance between the limiting member 430 and the first step structure, so that the gap between the first step structure and the limiting member 430 forms a limiting groove. One side boundary of the limiting groove is a first step structure integrated with the hub 411, and the other side boundary is a separately set limiting member 430. During assembly, the bearing 420 is first fitted onto the second section, and then the limiting member 430 is installed and the interval between the limiting member 430 and the first step structure is adjusted to form the limiting groove, which reduces the assembly difficulty of the bearing 420. On the other hand, the position of the limiting member 430 fitted onto the outside of the hub 411 can be adjusted as needed to change the distance between the limiting member 430 and the first step structure, thus realizing the adjustable width of the limiting groove, which is beneficial for compensating for machining accuracy and assembly accuracy, and reducing manufacturing difficulty.

[0096] In one embodiment, the grinding device further includes a second limiting structure 600, which connects the elbow assembly 200 and the bearing 420 to restrict the bearing 420 from moving along its own axial direction.

[0097] Reference Figure 1 In an embodiment of the present invention, the grinding and drilling device further includes a second limiting structure 600. The second limiting structure 600 forms a block from both sides or one side of the axial direction of the bearing 420, preventing the bearing 420 from moving along its own axial direction and avoiding axial movement of the bearing 420. This keeps the reference position of the bearing 420 unchanged. During the meshing and adjustment of the driven gear 410 and the driving gear 121, the axial displacement of the hub 411 can be completely converted into the gap change between the gear teeth 412 and the driving gear 121, ensuring precise and controllable meshing and adjustment. In addition, during the operation of the grinding and drilling device, the bearing 420 is prevented from driving the driven gear 410 to move axially, preventing unstable meshing or increased vibration between the driving gear 121 and the driven gear 410, thereby ensuring the reliability and stability of power transmission. The second limiting structure 600 can be a stepped structure in the assembly channel 201, or a retaining ring, threaded sleeve, etc., provided in the assembly channel 201.

[0098] In one embodiment, the second limiting structure 600 includes a second step structure and a fastener 610. The inner wall of the assembly channel 201 is provided with the second step structure. The fastener 610 is detachably connected to the elbow assembly 200. The fastener 610 and the second step structure are located on opposite sides of the bearing 420 to restrict the bearing 420 from moving along its own axial direction.

[0099] Combination Figure 1 , Figure 3 and Figure 10 In an embodiment of the present invention, the second limiting structure 600 includes a second step structure and a fastener 610. The inner wall of the assembly channel 201 forms a second step structure where the inner diameter of the section where the bearing 420 is installed is smaller than the adjacent section. The fastener 610 is detachably connected to the elbow assembly 200 via threaded connection or snap-fit. The fastener 610 and the second step structure are located on opposite sides of the bearing 420, i.e., the bearing 420 is sandwiched between the second step structure and the fastener 610, thereby restricting the axial movement of the bearing 420 to both sides. The second limiting structure 600 has a simple structure and is easy to process and assemble. During assembly, simply place the bearing 420 into the assembly channel 201 and ensure one side of the bearing 420 fits against the second step structure, then install and tighten the fastener 610. The operation is convenient. During disassembly, the bearing 420 can also be quickly removed by loosening the fastener 610, facilitating later maintenance or replacement.

[0100] In one embodiment, the outer peripheral wall of the fastener 610 is threadedly connected to the inner wall of the assembly channel 201; and / or,

[0101] The fastener 610 has at least two wrench grooves 611 at the end away from the bearing 420.

[0102] In an embodiment of the present invention, the outer peripheral wall of the fastener 610 is provided with external threads, and the inner wall of the assembly channel 201 of the elbow assembly 200 is provided with internal threads at a corresponding position. The two are connected detachably through threaded engagement. The self-locking characteristic of the threads ensures that the fastener 610 is not easily loosened during device operation, ensuring stable axial clamping force on the bearing 420. On the other hand, by rotating the fastener 610, its axial position within the assembly channel 201 can be finely adjusted, thereby precisely controlling the clamping force on the bearing 420, avoiding excessive tightness that could damage the bearing 420 or excessive looseness that could lead to fixing failure.

[0103] Reference Figure 10 In an embodiment of the present invention, the end of the fastener 610 away from the bearing 420 is provided with at least two wrench grooves 611. These wrench grooves 611 are evenly or symmetrically distributed along the circumference of the fastener 610. For example, two opposing wrench grooves 611 or three wrench grooves 611 distributed at 120°. The wrench grooves 611 are used to provide a force application point for tools such as wrenches, which facilitates the installation of the fastener 610 and solves the problem of difficulty in disassembling and assembling by hand due to the small size of the fastener 610.

[0104] In one embodiment, the first handle 100 further includes a support sleeve 140. One end of the support sleeve 140 is located between the drive motor 122 and the first housing 110, and the other end extends into the assembly channel 201 and is fitted over the drive gear 121. The first housing 110 has a wire outlet groove 1102 extending along its own axial direction. The wire 130 is led out from the wire outlet groove 1102 and passes through the assembly channel 201, and is located on the side of the support sleeve 140 away from the drive gear 121. The support sleeve 140 separates the drive gear 121 and the wire 130, avoiding interference between the drive gear 121 and the wire 130, and reducing the risk of damage to the drive gear 121 and the wire 130.

[0105] The present invention also proposes a drilling device, including the handle assembly of the drilling device described above. The specific structure of the handle assembly of the drilling device is as described in the above embodiments. Since this drilling device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0106] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A handle assembly for a drilling device, characterized in that, include: The first handle includes a first housing; The second handle includes a second housing; An elbow assembly includes an elbow body and a connecting sleeve. The elbow body is fixed to a second housing and has a first channel. One end of the connecting sleeve is movably connected to the elbow body and is rotatable around its own axis and is fixed relative to the axial position of the elbow body. The other end of the connecting sleeve is threadedly connected to the first housing so that the second housing is fixed to the first housing through the elbow body and the connecting sleeve. An isolation sleeve, one end of which is fixed inside the first channel, and the other end extending towards the first handle and covering the movable connection between the connecting sleeve and the elbow body; the isolation sleeve also has an axially penetrating second channel; and A wire extends from the first housing, passes through the first channel and the second channel, and extends into the interior of the second housing.

2. The handle assembly of the grinding device as described in claim 1, characterized in that, The first housing is provided with a cable outlet groove, and the wire is led out from the cable outlet groove.

3. The handle assembly of the grinding device as described in claim 2, characterized in that, The cable outlet groove extends radially through the first housing, and one end of the connecting sleeve, which is threadedly connected to the first housing, is fitted onto the outside of the first housing.

4. The handle assembly of the grinding device as described in claim 1, characterized in that, The inner wall of the first channel is provided with a first wire guide groove, and the wire is at least partially housed in the first wire guide groove; and / or, The inner wall of the second channel is provided with a second wire guide groove, and the wire is at least partially housed in the second wire guide groove.

5. The handle assembly of the grinding device as described in claim 1, characterized in that, The first handle also includes: A drive assembly includes a drive motor and a drive gear connected to the drive motor. The drive motor is disposed inside the first housing, and the drive gear is rotatably disposed inside the second channel. A support sleeve, one end of which is fitted inside the first housing, and the other end extends into the second channel and is fitted outside the drive assembly. The wire is located on the side of the support sleeve opposite to the drive assembly.

6. The handle assembly of the grinding device as claimed in claim 1, characterized in that, There is a gap between the outer wall of the isolation sleeve at the end closest to the first housing and the inner wall of the first channel, and the gap forms a snap-fit ​​groove. The connecting sleeve is partially disposed in the snap-fit ​​groove to realize the movable connection between the connecting sleeve and the elbow body.

7. The handle assembly of the grinding device as described in claim 6, characterized in that, The elbow assembly further includes a first limiting structure, which connects the elbow body and the connecting sleeve, or the first limiting structure connects the isolation sleeve and the connecting sleeve, to prevent the connecting sleeve from leaving the snap ring groove.

8. The handle assembly of the grinding device as claimed in claim 1, characterized in that, The isolation sleeve is threadedly connected to the elbow body, and the first channel is provided with a limiting step surface that abuts against the isolation sleeve.

9. The handle assembly of the grinding device as claimed in claim 1, characterized in that, The elbow assembly also includes a positioning structure that connects the isolation sleeve and the first housing to prevent the isolation sleeve from rotating relative to the first housing.

10. A grinding and drilling device, characterized in that, Includes the handle assembly of the grinding device as described in any one of claims 1 to 9.

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