Water-cooled micromotor and medical power handle

Abstract

The utility model relates to a water-cooled micromotor and a medical power handle, in the operation process, cooling liquid such as water can be injected into a water inlet channel from the outside, and the cooling liquid enters a flow guide channel through the water inlet channel, flows to a water outlet channel along the axial direction and is discharged to the outside. The cooling liquid can exchange heat with the motor body in the flowing process, so that the heat can be timely and effectively taken away, the problems of overheating and the like are avoided, and the use performance and the service life of the water-cooled micromotor are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of water-cooled micro motor and medical power handle. BACKGROUND

[0002] Micro motor is the key component of the power source of surgical power device due to small size and large output power, and is widely used in power handles such as surgical drill, grinding, sawing, milling and planing. A large amount of heat is generated during the operation of the micro motor due to friction or resistance, etc. If the heat cannot be dissipated in time and effectively, the use performance and service life of the micro motor will be affected. SUMMARY

[0003] Therefore, it is necessary to provide a water-cooled micro motor and a medical power handle to solve the technical problem that the heat cannot be dissipated in time and effectively, affecting the use performance and service life of the micro motor.

[0004] The technical scheme is as follows:

[0005] On the one hand, a water-cooled micro motor is provided, comprising:

[0006] a housing, the housing is provided with a mounting channel extending in the axial direction, and is provided with a water outlet channel located at the front end of the housing;

[0007] a motor body, the motor body is arranged in the mounting channel, and the motor body is provided with a flow guide groove extending in the axial direction, the flow guide groove and the inner wall of the housing form a flow guide channel, and the flow guide channel is communicated with the water outlet channel; and

[0008] a rear end assembly, the rear end assembly is connected with the rear end of the housing, and the rear end assembly is provided with a water inlet channel communicated with the flow guide channel.

[0009] The technical scheme is further described as follows:

[0010] In one embodiment, the flow guide groove is a plurality of flow guide grooves, the plurality of flow guide grooves are distributed at intervals around the circumferential direction of the motor body, and the water inlet channel and the water outlet channel are both communicated with each flow guide channel.

[0011] In one embodiment, the rear end assembly comprises a sealing seat and a sealing sleeve, the rear end of the motor body is provided with a plug-in cavity, one end of the sealing seat is inserted into the plug-in cavity and tightly matched with the motor body, the sealing sleeve is sleeved on the outer sidewall of the sealing seat, the sealing sleeve is provided with the water inlet channel, and the sealing sleeve is tightly matched with the rear end of the housing.

[0012] In one of the embodiments, the water-cooled micro motor further comprises a first sealing member, the sealing sleeve is partially inserted into the mounting channel, and the inner side wall of the mounting channel is sealingly matched with the sealing sleeve through the first sealing member.

[0013] In one of the embodiments, the outer side wall of the sealing sleeve is provided with an abutting part, and the abutting part is abuttingly matched with the rear end of the housing.

[0014] In one of the embodiments, the inner side wall of the sealing sleeve is provided with a first limiting part, the outer side wall of the sealing seat is provided with a second limiting part, and the first limiting part is limitingly matched with the second limiting part to axially separate the sealing sleeve from the rear end of the motor body.

[0015] In one of the embodiments, the water-cooled micro motor further comprises a second sealing member, the inner side wall of the sealing seat is sealingly matched with the plug-in cavity through the second sealing member.

[0016] In one of the embodiments, the water-cooled micro motor further comprises a third sealing member, the inner side wall of the sealing sleeve is sealingly matched with the outer side wall of the sealing seat through the third sealing member.

[0017] In one of the embodiments, the water-cooled micro motor further comprises a fourth sealing member, the front end of the housing is sealingly matched with the front end of the motor body through the fourth sealing member.

[0018] In another aspect, a medical power handle is provided, comprising an execution element and the water-cooled micro motor, and the water-cooled micro motor is drivingly connected with the execution element.

[0019] The water-cooled micro motor and the medical power handle of the above embodiments can inject water or other cooling liquid into the water channel from the outside during operation, and the cooling liquid enters the flow guide channel through the water channel and flows axially to the water outlet channel and is discharged to the outside. The cooling liquid can exchange heat with the motor body during the flow process, so that the heat can be carried away in time and effectively, and overheating and other problems can be avoided, and the use performance and service life of the water-cooled micro motor can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application.

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is an axial sectional view of a water-cooled micro motor of an embodiment;

[0023] Figure 2 It is Figure 1 A-A sectional view of the water-cooled micro motor.

[0024] Explanation of reference signs:

[0025] 10, water-cooled micro motor; 100, shell; 110, water outlet channel; 120, output shaft; 200, motor body; 210, flow guide groove; 220, plug-in cavity; 300, rear end assembly; 310, sealing seat; 311, second limiting part; 320, sealing sleeve; 321, abutting part; 322, first limiting part; 330, water inlet channel; 400, first sealing element; 500, second sealing element; 600, third sealing element; 700, fourth sealing element. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In one embodiment, a medical power handle is provided, which comprises an execution element (not shown) and a water-cooled micro motor 10, the water-cooled micro motor 10 is drivingly connected with the execution element through a coupling or the like, so as to drive the execution element to rotate and perform corresponding operations. Moreover, the water-cooled micro motor 10 can dissipate heat in time and effectively during operation, thereby ensuring the use performance and service life of the water-cooled micro motor 10.

[0028] It should be noted that the execution element can be any existing component capable of performing corresponding operations, for example, it can be a transmission shaft for driving a bone drill bit or a bone grinding head. Since it can belong to an existing component, it will not be described here.

[0029] For example, Figure 1As shown in the drawings, in one embodiment, a water-cooled micro motor 10 is provided, comprising a shell 100, a motor body 200 and a rear end assembly 300.

[0030] As shown in the drawings, Figure 1 The shell 100 can be generally cylindrical in shape. The shell 100 is provided with an installation channel (not labeled) extending in the axial direction, and the shell 100 is provided with a water outlet channel 110 at the front end of the shell 100.

[0031] It should be noted that the water-cooled micro motor 10 also includes an output shaft 120 for outputting power. The front end of the present embodiment refers to the end close to the output shaft 120, i.e. the end close to the power output of the water-cooled micro motor 10. Correspondingly, the rear end of the present embodiment refers to the end away from the output shaft 120, i.e. the end away from the power output of the water-cooled micro motor 10. Moreover, the front end and the rear end are arranged in opposite directions along the axial direction of the output shaft 120.

[0032] The motor body 200 is arranged in the installation channel, and the motor body 200 is provided with a flow guide groove 210 extending in the axial direction. The flow guide groove 210 forms a flow guide channel (not labeled) with the inner wall of the shell 100, and the flow guide channel is in communication with the water outlet channel 110.

[0033] Specifically, the motor body 200 includes a stator, a rotor and other components. The stator is arranged on the outer circumferential side of the rotor. The stator is installed in the installation channel in an interference fit. The outer side wall of the stator is provided with a flow guide groove 210 extending in the axial direction.

[0034] It should be noted that the assembly form of the stator and the rotor can be realized by using the existing assembly form.

[0035] The rear end assembly 300 is connected to the rear end of the shell 100. The rear end assembly 300 is provided with a water inlet channel 330 in communication with the flow guide channel.

[0036] The water-cooled micro motor 10 of the above embodiment can inject water or other cooling liquid into the water inlet channel 330 from the outside during operation. The cooling liquid enters the flow guide channel through the water inlet channel 330 and flows in the axial direction to the water outlet channel 110 and is discharged to the outside. The cooling liquid can exchange heat with the motor body 200 during flow, so that the heat can be carried away in time and effectively, avoiding overheating and other problems, and ensuring the use performance and service life of the water-cooled micro motor 10.

[0037] As shown in the drawings, Figure 1 and Figure 2As shown, in one embodiment, there are multiple guide grooves 210, for example, two, three or more, and the specific number can be flexibly designed or selected according to actual use needs. Among them, multiple guide grooves 210 are spaced apart in the circumferential direction around the motor body 200, thereby forming multiple guide channels. In addition, the water inlet channel 330 and the water outlet channel 110 are both connected to each guide channel. In this way, the contact area and contact region between the coolant and the motor body 200 can be increased, so that the coolant can achieve sufficient heat exchange with the motor body 200, and can take away heat more promptly and effectively, avoiding problems such as overheating, and ensuring the performance and service life of the water-cooled micromotor 10.

[0038] like Figure 1 As shown, in one embodiment, the rear end assembly 300 includes a sealing seat 310 and a sealing sleeve 320. A plug-in cavity 220 is provided at the rear end of the motor body 200, and one end of the sealing seat 310 is inserted into the plug-in cavity 220 and is fastened to the motor body 200 by means of interference fit or the like. The sealing sleeve 320 is sleeved on the outer wall of the sealing seat 310 by means of threaded fit or the like, and the sealing sleeve 320 is provided with a water inlet channel 330, so that the coolant is injected into the guide channel through the water inlet channel 330 on the sealing sleeve 320. Moreover, the sealing sleeve 320 is sealed with the rear end of the housing 100, thereby preventing the coolant from leaking or overflowing from the gap between the sealing sleeve 320 and the housing 100.

[0039] Optionally, a water injection joint may be provided on the sealing sleeve 320 , and the coolant is injected into the water inlet channel 330 through the water injection joint.

[0040] like Figure 1 As shown, in one embodiment, the water-cooled micromotor 10 further includes a first sealing member 400. The sealing sleeve 320 is partially inserted into the mounting channel, and the sealing sleeve 320 and the inner wall of the mounting channel are sealed together by the first sealing member 400. Thus, the first sealing member 400 seals the gap between the sealing sleeve 320 and the housing 100, preventing coolant from leaking or overflowing from the gap between the sealing sleeve 320 and the housing 100.

[0041] Specifically, one of the outer wall of the sealing sleeve 320 or the inner wall of the installation channel is provided with a first installation groove for installing the first sealing member 400. When the sealing sleeve 320 is inserted into the installation channel, the first sealing member 400 fills and seals the gap between the sealing sleeve 320 and the housing 100.

[0042] Optionally, the first sealing member 400 may be in the form of a sealing ring or the like.

[0043] like Figure 1As shown in the drawings, in one embodiment, the outer side wall of the sealing sleeve 320 is provided with an abutting portion 321 which abuts against the rear end of the housing 100. In this way, the abutting of the abutting portion 321 against the rear end of the housing 100 enables the sealing sleeve 320 and the housing 100 to be positioned and assembled accurately, ensures the assembly precision, and also enables the first sealing member 400 to seal the gap between the sealing sleeve 320 and the housing 100 accurately.

[0044] Optionally, the abutting portion 321 can be in the form of an abutting step or in the form of an abutting flange.

[0045] As shown in the drawings, Figure 1 In one embodiment, the inner side wall of the sealing sleeve 320 is provided with a first limiting portion 322, and the outer side wall of the sealing seat 310 is provided with a second limiting portion 311. The first limiting portion 322 and the second limiting portion 311 limit and cooperate to enable the rear end of the motor body 200 and the sealing sleeve 320 to be arranged axially and spaced apart. In this way, an annular cavity is formed between the rear end of the motor body 200 and the sealing sleeve 320, and the annular cavity is used to communicate the water inlet channel 330 with the flow guide groove 210. Even if the number of flow guide grooves 210 is multiple, the cooling liquid can still flow smoothly into each flow guide groove, and the water inlet channel 330 and the flow guide groove do not need to be aligned during the assembly of the sealing sleeve 320, thereby reducing the assembly difficulty. At the same time, the limiting cooperation between the first limiting portion 322 and the second limiting portion 311, in combination with the abutting of the abutting portion 321 against the rear end of the housing 100, can accurately form the annular cavity between the rear end of the motor body 200 and the sealing sleeve 320.

[0046] The limiting cooperation between the first limiting portion 322 and the second limiting portion 311 can be achieved in the form of an abutting step abutting against an abutting step, or in the form of a limiting flange abutting against a limiting flange.

[0047] As shown in the drawings, Figure 1 In one embodiment, the water-cooled micro motor 10 further comprises a second sealing member 500. The inner side wall of the sealing seat 310 and the plug-in cavity 220 are sealed and cooperated by the second sealing member 500. In this way, the second sealing member 500 is used to seal the gap between the sealing seat 310 and the motor body 200, so as to avoid the leakage or overflow of the cooling liquid from the gap between the sealing seat 310 and the motor body 200.

[0048] Specifically, one of the outer wall of the sealing seat 310 or the inner wall of the plug-in cavity 220 is provided with a second installation groove for installing the second sealing member 500. When the sealing seat 310 is inserted into the plug-in cavity 220, the second sealing member 500 fills and seals the gap between the sealing seat 310 and the motor body 200.

[0049] Optionally, the second sealing member 500 may be in the form of a sealing ring or the like.

[0050] like Figure 1 As shown, in one embodiment, the water-cooled micromotor 10 further includes a third sealing member 600. The inner sidewall of the sealing sleeve 320 and the outer sidewall of the sealing seat 310 are sealed together by the third sealing member 600. Thus, the third sealing member 600 seals the gap between the sealing seat 310 and the sealing sleeve 320, preventing coolant from leaking or overflowing from the gap between the sealing seat 310 and the sealing sleeve 320.

[0051] Specifically, one of the outer wall of the sealing seat 310 or the inner wall of the sealing sleeve 320 is provided with a third installation groove for installing the third sealing member 600. When the sealing sleeve 320 is mounted on the sealing seat 310, the third sealing member 600 fills and seals the gap between the sealing seat 310 and the sealing sleeve 320.

[0052] Optionally, the third sealing member 600 may be in the form of a sealing ring or the like.

[0053] like Figure 1 As shown, in one embodiment, the water-cooled micromotor 10 further includes a fourth seal 700. The front end of the housing 100 and the front end of the motor body 200 are sealed together via the fourth seal 700. Thus, the fourth seal 700 seals the gap between the front ends of the motor body 200 and the housing 100, preventing coolant from leaking or overflowing from the gap between the front ends of the motor body 200 and the housing 100.

[0054] Specifically, one of the front ends of the motor body 200 or the housing 100 is provided with a fourth installation groove for installing the fourth seal 700. When the motor body 200 is installed in the installation channel, the fourth seal 700 fills and seals the gap between the front end of the motor body 200 and the front end of the housing 100.

[0055] Optionally, the fourth sealing member 700 may be in the form of a sealing ring or the like.

[0056] It should be noted that "certain body" and "certain part" can be a part of the "member", that is, "certain body" and "certain part" are integrally formed with other parts of the "member"; or it can be a separate member that can be separated from other parts of the "member", that is, "certain body" and "certain part" can be independently manufactured, and then combined with other parts of the "member" to form a whole. The expression of the above "certain body" and "certain part" in the present application is only one of the embodiments, for the convenience of reading, and is not a limitation on the protection scope of the present application, as long as the above-mentioned characteristics are included and the same effect is understood as the equivalent technical solution of the present application.

[0057] It should be noted that the components included in the "unit", "component", "mechanism", "device" of the present 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 the present application is only one of the embodiments, for the convenience of reading, and is not a limitation on the protection scope of the present application, as long as the above-mentioned components are included and the same effect is understood as the equivalent technical solution of the present application.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0059] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0060] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be direct connection, also can indirectly connect through the intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limitation. For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0061] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be 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, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can simply mean that the first feature is at a higher horizontal level than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can simply mean that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that when an element is referred to as "fixed to", "provided to", "fixed to" or "installed to" another element, it can be directly on another element or there can be a middle element. When an element is considered "connected" to another element, it can be directly connected to another element or there can be a middle element. Further, when an element is considered "fixed transmission connection" to another element, they can be fixed in a detachable manner or in a non-detachable manner, as long as power transmission can be achieved, such as sleeving, clamping, integral molding, welding, etc. In the prior art, it can be achieved, and here it is not repeated. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to manufacturing and assembly, there can be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are for illustrative purposes only and are not the only implementation. The term "and / or" used in this document includes any and all combinations of one or more related listed items.

[0063] It should also be understood that when interpreting the connection relationship or positional relationship of an element, although not explicitly described, the connection relationship and positional relationship are interpreted to include an error range that should be within an acceptable deviation range of a specific value determined by a person skilled in the art. For example, "about", "approximately" or "essentially" can mean within one or more standard deviations, without limitation.

[0064] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradiction, it should be considered as the scope of the description.

[0065] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the utility model concept, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A water-cooled micromotor, characterized in that: include: a housing, wherein the housing is provided with a mounting passage extending in an axial direction and a water outlet passage located at a front end of the housing; a motor body, the motor body being disposed in the installation channel and provided with a guide groove extending in an axial direction, the guide groove and the inner wall of the housing forming a guide channel, the guide channel being in communication with the water outlet channel; and A rear end component is connected to the rear end of the shell, and the rear end component is provided with a water inlet channel connected to the guide channel.

2. The water-cooled micromotor according to claim 1, characterized in that: There are a plurality of guide grooves, which are spaced apart in the circumferential direction around the motor body, and the water inlet channel and the water outlet channel are both connected to each guide channel.

3. The water-cooled micromotor according to claim 1, characterized in that: The rear end component includes a sealing seat and a sealing sleeve. The rear end of the motor body is provided with a plug-in cavity. One end of the sealing seat is inserted into the plug-in cavity and tightly fitted with the motor body. The sealing sleeve is mounted on the outer side wall of the sealing seat. The sealing sleeve is provided with the water inlet channel, and the sealing sleeve is sealed with the rear end of the shell.

4. The water-cooled micromotor according to claim 3, characterized in that: The water-cooled micromotor further includes a first sealing member. The sealing sleeve is partially inserted into the installation channel, and the sealing sleeve is sealed and matched with the inner side wall of the installation channel through the first sealing member.

5. The water-cooled micromotor according to claim 4, characterized in that: The outer side wall of the sealing sleeve is provided with a contact portion, and the contact portion contacts and fits with the rear end of the shell.

6. The water-cooled micromotor according to claim 5, characterized in that: The inner side wall of the sealing sleeve is provided with a first limiting portion, and the outer side wall of the sealing seat is provided with a second limiting portion. The first limiting portion and the second limiting portion cooperate to limit and cooperate so that the sealing sleeve and the rear end of the motor body are axially spaced apart.

7. The water-cooled micromotor according to claim 3, characterized in that: The water-cooled micromotor further includes a second sealing member, and the sealing seat and the inner side wall of the plug-in cavity are sealed together via the second sealing member.

8. The water-cooled micromotor according to claim 3, characterized in that: The water-cooled micromotor further includes a third sealing member, and the inner side wall of the sealing sleeve and the outer side wall of the sealing seat are sealed together through the third sealing member.

9. The water-cooled micromotor according to any one of claims 1 to 7, characterized in that: The water-cooled micromotor further includes a fourth sealing member, and the front end of the housing and the front end of the motor body are sealed and matched via the fourth sealing member.

10. A medical power handle, characterized in that: It comprises an actuator and the water-cooled micromotor according to any one of claims 1 to 9, wherein the water-cooled micromotor is transmission-connected to the actuator.

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