Bone drilling handle and bone drilling device

Abstract

When the bone drilling handle and the bone drilling device are used, one end of a drill rod is inserted into the bone drilling handle to enable the drill rod to be in transmission fit with a matching part on the output end of a speed reducing mechanism, a driving motor is started to enable an output shaft to axially rotate around the center of the output shaft, and therefore the input end of the speed reducing mechanism is driven to synchronously rotate. Power is transmitted to the output end after speed reduction and torque increase of the speed reduction mechanism, and the output end is used for driving the drill rod to rotate with large torque so as to conduct drilling and other operations on bone tissue. Moreover, as the first through hole in the output shaft is communicated with the second through hole in the speed reducing mechanism to form the drainage channel, even if the drill rod is stained with liquid such as water drops, the liquid can be timely and smoothly drained through the drainage channel, normal use of the bone drilling handle cannot be affected, and the service life of the bone drilling handle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a bone drilling handle and a bone drilling device. Background Art

[0002] Bone drilling devices such as drill handsets are usually used to drill bone tissue during orthopedic surgery and are widely used in clinical medicine. At the same time, in order to increase the torque during bone drilling, the power of the drive motor is decelerated and torqued in the bone drilling handle through a reduction mechanism and then output to the drill rod. Since the drill rod may be contaminated with liquids such as water droplets during storage or disinfection, after the drill rod is inserted into the bone drilling handle, the liquid contaminated on the drill rod will interfere with the internal structure, affecting the normal use of the bone drilling handle and shortening the service life of the bone drilling handle. Utility Model Content

[0003] Based on this, it is necessary to provide a bone drilling handle and a bone drilling device to address the problems of affecting the normal use of the bone drilling handle and shortening the service life of the bone drilling handle.

[0004] The technical solution is as follows:

[0005] In one aspect, a bone drilling handle is provided, comprising:

[0006] A driving motor, wherein the driving motor is provided with an output shaft, wherein the output shaft has a first through hole extending along the axial direction of the output shaft; and

[0007] A reduction mechanism, wherein the reduction mechanism is provided with an input end and an output end, the input end is in transmission cooperation with the output shaft, the output end is provided with a cooperation portion for transmission cooperation with a drill pipe, and the reduction mechanism is provided with a second through hole passing through the input end and the output end, the second through hole is connected with the first through hole to form a drainage channel.

[0008] The technical solution is further described below:

[0009] In one embodiment, the bone drilling handle also includes a barrier sleeve, which is disposed in the second through hole and sealingly cooperates with the inner wall of the second through hole, and the barrier sleeve is provided with a third through hole extending along the axial direction of the barrier sleeve, and the third through hole is connected to the first through hole to form the drainage channel.

[0010] In one embodiment, the bone drilling handle further comprises a first sealing element, through which the input end and the barrier sleeve are sealed and matched.

[0011] In one embodiment, the bone drilling handle further comprises a second sealing element, through which the output end and the barrier sleeve are sealed and matched.

[0012] In one embodiment, the bone drilling handle further comprises a support bearing, and the support bearing is sleeved on the outer wall of the barrier sleeve, and the output end is rotatably matched with the barrier sleeve through the support bearing.

[0013] In one embodiment, one end of the barrier sleeve is plugged into the input end and spaced apart from the output shaft to form a gap, and the third through hole, the gap and the first through hole are connected in sequence to form the drainage channel.

[0014] In one embodiment, a central axis of the first through hole is collinear with a central axis of the second through hole.

[0015] In one embodiment, the bone drilling handle also includes a shell, the shell is provided with an installation cavity, the drive motor is arranged in the installation cavity, the reduction mechanism is partially arranged in the installation cavity, and the side of the shell away from the output end is provided with a drainage hole connected to the drainage channel.

[0016] In one embodiment, the reduction mechanism includes a first reducer and a second reducer, the first reducer is provided with the input end, the second reducer is provided with the output end, and the first reducer is transmission-connected with the second reducer.

[0017] On the other hand, a bone drilling device is provided, comprising a drill rod and the bone drilling handle, wherein the drill rod is in transmission cooperation with the cooperation portion.

[0018] When the bone drilling handle and the bone drilling device of the above-mentioned embodiment are used, one end of the drill rod is inserted into the bone drilling handle so that the drill rod and the matching part on the output end of the speed reduction mechanism are in transmission cooperation, and the driving motor is started so that the output shaft rotates around its own central axis, thereby driving the input end of the speed reduction mechanism to rotate synchronously, and the power is transmitted to the output end after the speed reduction and torque increase of the speed reduction mechanism, and the output end is used to drive the drill rod to rotate with a large torque to perform operations such as drilling holes in bone tissue. In addition, since the first through hole on the output shaft and the second through hole on the speed reduction mechanism are interconnected to form a drainage channel, even if the drill rod is stained with liquids such as water drops, the liquid can be discharged promptly and smoothly through the drainage channel, which will not affect the normal use of the bone drilling handle and extend the service life of the bone drilling handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of a bone drilling device according to an embodiment;

[0022] Figure 2 for Figure 1 A partial enlarged view of part A of the bone drilling device.

[0023] Description of reference numerals:

[0024] 10. Bone drilling handle; 100. Driving motor; 110. Output shaft; 111. First through hole; 200. Speed ​​reduction mechanism; 210. Input end; 220. Output end; 230. Second through hole; 240. First speed reducer; 250. Second speed reducer; 300. Drainage channel; 400. Barrier sleeve; 410. Third through hole; 500. First sealing element; 600. Second sealing element; 700. Support bearing; 800. Gap; 900. Housing; 910. Mounting cavity; 920. Drainage hole; 20. Drill rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] like Figure 1 As shown, in one embodiment, a bone drilling device is provided, including a drill rod 20 and a bone drilling handle 10. In this way, the drill rod 20 is inserted into the bone drilling handle 10, and the bone drilling handle 10 is held and driven to rotate, so as to perform operations such as drilling holes on bone tissue. In addition, the bone drilling handle 10 of the bone drilling device can discharge liquids such as water droplets stained on the drill rod 20 in a timely and smooth manner, which will not affect the normal use of the bone drilling handle 10, and extend the service life of the bone drilling handle 10.

[0027] like Figure 1 As shown, in one embodiment, the bone drilling handle 10 includes a driving motor 100 and a reduction mechanism 200 .

[0028] like Figure 1 As shown, the driving motor 100 is provided with an output shaft 110 , and the output shaft 110 has a first through hole 111 extending along its axial direction, that is, the first through hole 111 passes through opposite ends of the output shaft 110 .

[0029] Optionally, the driving motor 100 may be a device capable of providing torque, such as a servo motor, and the output shaft 110 may be driven by the rotation of the rotor.

[0030] like Figure 1 and Figure 2 As shown, the speed reduction mechanism 200 is provided with an input end 210 and an output end 220. Specifically, the input end 210 is matched with the output shaft 110 in transmission, so that the power of the driving motor 100 is transmitted to the speed reduction mechanism 200. For example, the input end 210 and the output shaft 110 can be matched in transmission by means of shaft hole matching or coupling connection; the output end 220 is provided with a matching portion (not marked). When the drill rod 20 is inserted into the bone drilling handle 10, the drill rod 20 is matched with the matching portion in transmission, so that the power of the driving motor 100 is output to the drill rod 20 after the speed reduction and torque increase of the speed reduction mechanism 200, so as to drive the drill rod 20 to rotate and drill the bone tissue. In addition, the speed reduction mechanism 200 is provided with a second through hole 230 that runs through the input end 210 and the output end 220, and the second through hole 230 is connected with the first through hole 111 to form a drainage channel 300.

[0031] Optionally, the speed reduction mechanism 200 may be a planetary speed reducer or other device that can perform speed reduction and torque increase functions.

[0032] Optionally, the drill rod 20 and the matching portion can achieve transmission matching through shaft-hole matching or coupling connection.

[0033] It should be noted that the bone drilling handle 10 may also include components such as a start button and a power supply. Since these components or structures may be existing components or structures, they will not be described in detail here.

[0034] When the bone drilling handle 10 of the above embodiment is used, one end of the drill rod 20 is inserted into the bone drilling handle 10 so that the drill rod 20 is in transmission cooperation with the matching part on the output end 220 of the reduction mechanism 200, and the driving motor 100 is started so that the output shaft 110 rotates around its own central axis, thereby driving the input end 210 of the reduction mechanism 200 to rotate synchronously, and the power is transmitted to the output end 220 after the reduction and torque increase of the reduction mechanism 200, and the output end 220 is used to drive the drill rod 20 to rotate with a large torque to perform operations such as drilling holes in bone tissue. In addition, since the first through hole 111 on the output shaft 110 and the second through hole 230 on the reduction mechanism 200 are connected to each other to form a drainage channel 300, even if the drill rod 20 is stained with liquid such as water droplets, the liquid can be discharged promptly and smoothly through the drainage channel 300, which will not affect the normal use of the bone drilling handle 10 and extend the service life of the bone drilling handle 10.

[0035] like Figure 2 As shown, in one embodiment, the bone drilling handle 10 further includes a barrier sleeve 400. The barrier sleeve 400 is installed in the second through hole 230, and the barrier sleeve 400 is sealed with the inner wall of the second through hole 230. Specifically, the barrier sleeve 400 is provided with a third through hole 410 extending along the axial direction of the barrier sleeve 400, that is, the third through hole 410 penetrates the opposite ends of the barrier sleeve 400 along the axial direction, and the third through hole 410 is connected with the first through hole 111 to form the drainage channel 300. Considering that there are many parts in the reduction mechanism 200, by installing the barrier sleeve 400 in the second through hole 230 and making the barrier sleeve 400 and the inner wall of the second through hole 230 sealed, the liquid is prevented from entering the interior of the reduction mechanism 200 during the process of flowing and discharging in the third through hole 410, thereby ensuring the waterproof performance.

[0036] The sealing cooperation between the barrier sleeve 400 and the inner side wall of the second through hole 230 may be achieved in the form of a sealing ring or in the form of a sealing sleeve, as long as the sealing performance is met.

[0037] like Figure 2 As shown, optionally, the bone drilling handle 10 further includes a first sealing element 500, through which the input end 210 is sealed with the barrier sleeve 400. In this way, the sealing of the first sealing element 500 prevents liquid from entering the interior of the speed reduction mechanism 200 from the gap 800 between the input end 210 and the barrier sleeve 400.

[0038] Specifically, the first sealing element 500 can be a first sealing ring, which is sleeved on the outer wall of the barrier sleeve 400 and cooperates with the inner wall of the input end 210 to achieve sealing; a first installation groove for installing the first sealing ring can also be opened on the inner wall of the input end 210 so that the first sealing ring and the outer wall of the barrier sleeve 400 are sealed and fitted.

[0039] like Figure 2 As shown, optionally, the bone drilling handle 10 further includes a second sealing element 600, through which the output end 220 is sealed with the barrier sleeve 400. In this way, the sealing of the second sealing element 600 prevents liquid from entering the interior of the speed reduction mechanism 200 from the gap 800 between the output end 220 and the barrier sleeve 400.

[0040] Specifically, the second sealing element 600 can be a second sealing ring, which is sleeved on the outer wall of the barrier sleeve 400 and cooperates with the inner wall of the output end 220 to achieve sealing; a second installation groove for installing the second sealing ring can also be opened on the inner wall of the output end 220 so that the second sealing ring and the outer wall of the barrier sleeve 400 are sealed and fitted.

[0041] Since the barrier sleeve 400 extends from the output end 220 to the input end 210, there is a difference in the rotation speed between the output end 220 and the input end 210. Figure 2 As shown, optionally, the bone drilling handle 10 further includes a support bearing 700. The support bearing 700 is sleeved on the outer wall of the barrier sleeve 400, and the output end 220 is rotatably matched with the barrier sleeve 400 through the support bearing 700. Specifically, the inner ring of the support bearing 700 is sleeved on the outer wall of the barrier sleeve 400, and the outer ring of the support bearing 700 is fixed on the output end 220, so that the barrier sleeve 400 can rotate smoothly relative to the output end 220, thereby keeping the rotation speed of the two ends of the barrier sleeve 400 consistent, avoiding distortion or deformation due to inconsistent rotation speed, ensuring the barrier effect, and avoiding affecting the seal, thereby ensuring the sealing effect.

[0042] like Figure 2As shown, more specifically, one end of the barrier sleeve 400 is plugged with the input end 210, and one end of the barrier sleeve 400 is spaced from the output shaft 110 to form a gap 800, thereby preventing the barrier sleeve 400 from interfering with or affecting the rotation of the output shaft 110. Moreover, the third through hole 410, the gap 800 and the first through hole 111 are sequentially connected to form the drainage channel 300, so that the liquid can be discharged in time and smoothly after passing through the third through hole 410, the gap 800 and the first through hole 111, which will not affect the normal use of the bone drilling handle 10 and extend the service life of the bone drilling handle 10. At the same time, through the sealing of the first sealing element 500, the liquid flowing through the gap 800 is prevented from entering the interior of the speed reduction mechanism 200 from the gap 800 between the input end 210 and the barrier sleeve 400.

[0043] In one embodiment, the central axis of the first through hole 111 is collinear with the central axis of the second through hole 230. In this way, the rotation axis of the output shaft 110 can be collinear with the rotation axes of the input end 210 and the output end 220, thereby ensuring transmission accuracy and transmission efficiency, and also facilitating a compact layout and miniaturized design of the bone drilling handle 10.

[0044] like Figure 1 As shown, in addition, the bone drilling handle 10 further includes a housing 900. The housing 900 is provided with an installation cavity 910, the drive motor 100 is arranged in the installation cavity 910, and the reduction mechanism 200 is partially arranged in the installation cavity 910. For example, the input end 210 is partially arranged in the installation cavity 910 so that the output shaft 110 and the input end 210 are in transmission connection. In addition, a drainage hole 920 connected to the drainage channel 300 is provided on one side of the housing 900 away from the output end 220. In this way, the liquid in the drainage channel 300 can be discharged in a timely and smooth manner through the drainage hole 920, which will not affect the normal use of the bone drilling handle 10 and extend the service life of the bone drilling handle 10.

[0045] Optionally, the output shaft 110 may extend from the input end 210 to the drain hole 920 so that the liquid can be discharged smoothly to avoid leakage.

[0046] The housing 900 can be assembled and connected with the housing of the reduction mechanism 200, so that the drive motor 100 and the reduction mechanism 200 can be integrated into one body for easy use.

[0047] like Figure 1As shown, in addition, the reduction mechanism 200 includes a first reducer 240 and a second reducer 250, the first reducer 240 is provided with the input end 210, the second reducer 250 is provided with the output end 220, and the first reducer 240 is transmission-connected with the second reducer 250. In this way, the torque transmitted by the output shaft 110 is output from the output end 220 to the drill rod 20 after two-stage reduction, which can greatly improve the output torque of the drill rod 20, and is conducive to drilling bone tissue more easily and labor-savingly.

[0048] The first reducer 240 and the second reducer 250 may both be planetary reducers.

[0049] In one embodiment, the output shaft 110 is connected to the sun gear of the first reducer 240, the sun gear of the first reducer 240 drives the planetary gears of the first reducer 240 to rotate, the planetary gears of the first reducer 240 drive the planetary carrier of the first reducer 240 to rotate, the planetary carrier of the first reducer 240 drives the planetary gears of the second reducer 250 to rotate, the planetary gears of the second reducer 250 drive the planetary carrier of the second reducer 250 to rotate, and the planetary carrier of the second reducer 250 drives the drill rod 20 to rotate.

[0050] It should be noted that "some body" or "some part" can be a part of the corresponding "component", that is, "some body" or "some part" can be integrally formed with the "other parts of the component"; it can also be an independent component that can be separated from the "other parts of the component", that is, "some body" or "some part" can be manufactured independently and then combined with the "other parts of the component" into a whole. The expression of the above-mentioned "some body" or "some part" in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as it contains the above-mentioned features and has the same function, it should be understood as an equivalent technical solution of this application.

[0051] It should be noted that the components included in the "unit", "assembly", "mechanism" and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as the above components are included and have the same functions, it should be understood that it is an equivalent technical solution of this application.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more related listed items.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. Further, when an element is considered to be "fixed transmission connected" to another element, the two can be fixed in a detachable connection manner or in a non-detachable connection, as long as power transmission can be achieved, such as socketing, snap-on, one-piece molding fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0057] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0058] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bone drilling handle, characterized in that: include: A driving motor, wherein the driving motor is provided with an output shaft, wherein the output shaft has a first through hole extending along the axial direction of the output shaft; and A reduction mechanism, wherein the reduction mechanism is provided with an input end and an output end, the input end is in transmission cooperation with the output shaft, the output end is provided with a cooperation portion for transmission cooperation with a drill pipe, and the reduction mechanism is provided with a second through hole passing through the input end and the output end, the second through hole is connected with the first through hole to form a drainage channel.

2. The bone drilling handle according to claim 1, characterized in that: The bone drilling handle also includes a barrier sleeve, which is arranged in the second through hole and sealingly cooperates with the inner wall of the second through hole. The barrier sleeve is provided with a third through hole extending along the axial direction of the barrier sleeve, and the third through hole is connected with the first through hole to form the drainage channel.

3. The bone drilling handle according to claim 2, characterized in that: The bone drilling handle further comprises a first sealing element, through which the input end is sealed and matched with the barrier sleeve.

4. The bone drilling handle according to claim 2, characterized in that: The bone drilling handle further comprises a second sealing element, through which the output end is sealed and matched with the barrier sleeve.

5. The bone drilling handle according to claim 2, characterized in that: The bone drilling handle further comprises a support bearing, and the support bearing is sleeved on the outer side wall of the barrier sleeve, and the output end is rotatably matched with the barrier sleeve through the support bearing.

6. The bone drilling handle according to claim 5, characterized in that: One end of the barrier sleeve is plugged into and matched with the input end and is spaced apart from the output shaft to form a gap. The third through hole, the gap and the first through hole are connected in sequence to form the drainage channel.

7. The bone drilling handle according to any one of claims 1 to 6, characterized in that: A central axis of the first through hole is collinear with a central axis of the second through hole.

8. The bone drilling handle according to any one of claims 1 to 6, characterized in that: The bone drilling handle also includes a shell, the shell is provided with an installation cavity, the drive motor is arranged in the installation cavity, the reduction mechanism is partially arranged in the installation cavity, and a drainage hole connected to the drainage channel is provided on the side of the shell away from the output end.

9. The bone drilling handle according to any one of claims 1 to 6, characterized in that: The deceleration mechanism comprises a first decelerator and a second decelerator, the first decelerator is provided with the input end, the second decelerator is provided with the output end, and the first decelerator is transmission-connected with the second decelerator.

10. A bone drilling device, characterized in that: It comprises a drill rod and a bone drilling handle as claimed in any one of claims 1 to 9, wherein the drill rod is in transmission cooperation with the matching part.

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