Motor assembly, medical handle and operation power equipment

Abstract

The utility model discloses a motor assembly, medical handle and operation power equipment, relates to medical instrument technical field, the motor assembly includes motor and front fixed sleeve, motor includes tubular main part and rotatingly set up the power output shaft in tubular main part, the interior of power output shaft forms along its axial through channel; the front fixing sleeve is detachably connected to the front end of the cylindrical body, the power output shaft is provided with an extending section extending out of the front end of the cylindrical body, a mounting space is formed between the outer wall of the extending section and the inner wall of the front fixing sleeve in a spaced mode, at least one component is arranged between the extending section and the front fixing sleeve, and the mounting space is used for containing the component. According to the technical scheme provided by the utility model, the problems that the complexity of the shell is increased and the assembly difficulty is possibly increased when parts are arranged on the front end shaft section of the hollow shaft of the existing hollow shaft motor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a motor assembly, a medical handle and a surgical power device. Background Technique

[0002] In the field of minimally invasive medical devices, motors are widely used in medical handles to provide rotational power for driving medical cutting tools.

[0003] The hollow shaft of the hollow shaft motor can provide a transfer channel for the cut tissue or tissue fluid, etc., and has the characteristic of high space utilization rate; however, when applying the hollow shaft motor to a medical handle, other components usually need to be arranged on the shaft section at the front end of the hollow shaft. Since the outer wall of the hollow shaft is smooth, positioning structures are currently provided correspondingly on the housing of the medical handle to position these components, which will make the structure of the handle housing more complex. Moreover, these parts need to cooperate with both the motor and the handle housing at the same time, and are restricted by the internal space of the handle housing, so there may be a problem of relatively large assembly difficulty. Summary of the Utility Model

[0004] The main object of the utility model is to propose a motor assembly, a medical handle and a surgical power device, aiming to solve the problems that arranging components on the front shaft section of the existing hollow shaft motor will increase the complexity of the housing and may also increase the assembly difficulty.

[0005] To achieve the above object, the motor assembly proposed by the utility model includes:

[0006] A motor, the motor includes a cylindrical main body and a power output shaft rotatably arranged in the cylindrical main body. The power output shaft has an extending section extending out of the front end of the cylindrical main body, and a channel axially penetrating through the inside of the power output shaft; and

[0007] A front fixing sleeve detachably connected to the front end of the cylindrical main body, and an installation space is formed at an interval between the outer wall of the extending section and the inner wall of the front fixing sleeve. At least one component is arranged between the extending section and the front fixing sleeve, and the installation space is used to accommodate the component.

[0008] In one embodiment, the cylindrical main body includes a main body section and a front docking section arranged at the front end of the main body section;

[0009] Wherein, at least part of the front docking section is provided with threads, and the front fixing sleeve is threadedly connected to the front docking section; and / or,

[0010] The outer diameter of the front docking section is smaller than the outer diameter of the main body section, and the threads extend along the axial direction of the front docking section; and / or,

[0011] The maximum outer diameter of the front fixing sleeve is equal to the outer diameter of the main body section.

[0012] In one embodiment, the at least one component further includes a first seal, the first seal is disposed in the installation space, and the first seal is in sealing contact with the inner wall of the front fixing sleeve and the outer wall of the protruding section respectively.

[0013] In one embodiment, the at least one component further includes a pressing plate and a bearing, the pressing plate and the bearing are both disposed in the installation space, and the front fixing sleeve presses the pressing plate against the front end of the cylindrical main body; the first seal is axially disposed between the pressing plate and the bearing.

[0014] In one embodiment, the motor assembly further includes a second seal disposed in the installation space, and the front fixing sleeve is provided with an annular groove with an opening facing away from the cylindrical main body, and the second seal is disposed in the annular groove.

[0015] In one embodiment, the at least one component further includes a bearing disposed in the installation space, the bearing is disposed inside the front fixing sleeve and sleeved on the outer periphery of the power output shaft.

[0016] The present utility model further provides a medical handle, which includes:

[0017] A handle body, which forms a cavity inside; and

[0018] A motor assembly, which is disposed in the cavity, and the motor assembly is the motor assembly described in any one of the above embodiments.

[0019] In one embodiment, an axially limiting step surface is provided in the cavity, and the front fixing sleeve of the motor assembly abuts against the axially limiting step surface.

[0020] In one embodiment, the medical handle further includes a locking sleeve, the locking sleeve is disposed at the end of the handle body to limit the motor assembly in the cavity.

[0021] In one embodiment, a key groove is provided on the inner wall of the cavity, a positioning key is provided on the outer wall of the motor, and the positioning key is engaged with the key groove;

[0022] Or,

[0023] A first key groove is provided on the inner wall of the cavity, a second key groove is provided on the outer wall of the motor, and the medical handle further includes a positioning key, and the positioning key is engaged with the first key groove and the second key groove respectively.

[0024] The present utility model also provides a medical surgical power device, which includes a medical handle and a medical tool that are adapted to each other. The medical handle is the medical handle described in any of the above embodiments.

[0025] In the technical solution of the present utility model, the motor assembly includes a motor and a front fixing sleeve. The front fixing sleeve is detachably connected to the front end of the cylindrical main body. By using the front fixing sleeve, the components on the output section can be positioned in the installation space between the front fixing sleeve and the protruding section. It is possible to utilize the installation space between the front fixing sleeve and the protruding section without relying on the handle housing for positioning, which is beneficial to simplifying the housing structure and reducing the assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 Structural schematic diagram of an embodiment of the motor assembly provided by the present utility model;

[0028] Figure 2 Partial structural schematic diagram of an embodiment of the motor assembly provided by the present utility model;

[0029] Figure 3 Exploded view of the structure of an embodiment of the motor assembly provided by the present utility model;

[0030] Figure 4 Structural schematic diagram of the motor in another embodiment of the motor assembly provided by the present utility model;

[0031] Figure 5 Structural schematic diagram of the front fixing sleeve in another embodiment of the motor assembly provided by the present utility model;

[0032] Figure 6 Structural schematic diagram of an embodiment of the medical handle provided by the present utility model.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100, motor assembly; 1, motor; 11, cylindrical main body; 110, channel; 111, main body section; 112, front docking section; 12, power output shaft; 2, front fixing sleeve; 21, annular groove; 22, installation space; 3, first sealing member; 4, pressing plate; 5, bearing; 6, second sealing member; 7, locking sleeve;

[0035] 200, medical handle; 01, handle body.

[0036] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments. Specific embodiments

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] When applying a hollow shaft motor to a medical handle, it is usually necessary to arrange other components on the shaft section at the front end of the hollow shaft. Since the outer wall of the hollow shaft is smooth, currently, a positioning structure is correspondingly provided on the housing of the medical handle to position these components, which will result in a more complex structure of the handle housing. Moreover, these parts need to cooperate with both the motor and the handle housing at the same time. Limited by the internal space of the housing, there may be problems with relatively large assembly difficulty.

[0041] For example, in order to prevent the fluid flowing out of the hollow shaft from entering the interior of the motor along the pipe wall of the hollow shaft, a sealing ring needs to be provided on the front end shaft of the hollow shaft. To position the sealing ring, currently, methods such as setting positioning steps and positioning grooves on the housing of the medical handle are used to position the sealing ring. In this way, during assembly, the sealing ring, the handle housing, and the hollow shaft of the motor need to be coordinated. Due to the limited operating space of the housing, the assembly difficulty is relatively large.

[0042] The present utility model proposes a motor assembly.

[0043] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the motor assembly 100 includes:

[0044] A motor 1, the motor 1 includes a cylindrical main body 11 and a power output shaft 12 rotatably disposed inside the cylindrical main body 11. The power output shaft 12 has an extending section extending from the front end of the cylindrical main body 11, and a channel 110 axially penetrating through the inside of the power output shaft 12 is formed; and

[0045] A front fixing sleeve 2, detachably connected to the front end of the cylindrical main body 11, and an installation space 22 is formed at an interval between the outer wall of the extending section and the inner wall of the front fixing sleeve 2. At least one component is provided between the extending section and the front fixing sleeve, and the installation space 22 is used to accommodate the component.

[0046] In the technical solution of the present utility model, the installation space 22 between the extending section of the power output shaft 12 and the inner wall of the front fixing sleeve 2 enables the component installed on the extending section of the power output shaft 12 to be positioned in the installation space 22 under the auxiliary positioning effect of the front fixing sleeve 2, without the need to provide corresponding positioning structures on the housing of the medical handle, which is beneficial to simplifying the housing structure of the medical handle. Before the motor assembly 100 is installed in the housing of the medical handle, these components are installed and positioned, and the entire installation process is no longer restricted by space and is easier to operate.

[0047] Specifically, in this solution, the shape of the front fixing sleeve 2 is not specifically limited, as long as it can be sleeved on the front end of the cylindrical main body 11 and can play a role in positioning components such as bearings and seals.

[0048] In an embodiment of the present utility model, please refer to Figure 1 and Figure 2 , the cylindrical main body 11 includes a main body section 111 and a front docking section 112 provided at the front end of the main body section 111.

[0049] Optionally, please refer to Figure 3 and Figure 4, at least a part of the front docking section 112 is provided with threads, and the front fixing sleeve 2 is threadedly connected to the front docking section 112. The threaded connection not only facilitates the disassembly and installation of the front fixing sleeve 2; in addition, the threaded connection can also produce a certain degree of sealing effect to prevent liquids, gases or microorganisms during the operation from entering the interior of the cylindrical main body 11, protecting the internal circuit and mechanical structure of the motor 1 from contamination.

[0050] Optionally, the outer diameter of the front docking section 112 is smaller than the outer diameter of the main body section 111. The design of the smaller outer diameter of the front docking section 112 makes the cylindrical main body 11 more precise when docking with other surgical instruments or accessories, which helps to improve the accuracy and efficiency of surgical operations. The threads are arranged along the axial direction of the front docking section 112, which can provide a more uniform force distribution, thereby enhancing the stability of the connection. During surgical operations, this stable connection can reduce the shaking of the handle and improve the safety of the operation.

[0051] Optionally, the maximum outer diameter of the front fixing sleeve 2 is equal to the outer diameter of the main body section 111. The consistency of the outer diameter of the front fixing sleeve 2 and the main body section 111 makes the overall appearance of the handle more unified and coordinated, improving the aesthetics of the surgical instrument. Since the outer diameter of the front fixing sleeve 2 is the same as that of the main body section 111, the connection between the two is smoother without abrupt size changes, which helps to reduce unstable factors during surgical operations.

[0052] In the embodiment of the present utility model, please refer to Figure 3 , the "at least one component" in the above description includes the first seal 3. The first seal 3 is arranged in the installation space 22, and the first seal 3 is in sealing contact with the inner wall of the front fixing sleeve 2 and the outer wall of the protruding section respectively. The first seal 3 can prevent moisture, dust and other particulate matter from entering the interior of the cylindrical main body 11, which helps to keep the inside of the motor assembly 100 clean, protects the motor 1 from the invasion of external environmental factors, and thus extends the service life of the motor. It should be noted that the first seal 3 can be an ordinary sealing ring or a lip seal, etc., as long as it can play a role in isolating the interior of the cylindrical main body 11 from the outside.

[0053] In the embodiment of the present utility model, the "at least one component" in the above description further includes a bearing 5 arranged in the installation space 22. The bearing 5 is arranged inside the front fixing sleeve 2 and sleeved on the outer periphery of the power output shaft 12. The arrangement of the bearing 5 provides an additional support point, making the power output shaft 12 more stable during rotation, reducing axial and radial vibrations, and improving the accuracy of surgical operations. In addition, by arranging the bearing 5 on the outer periphery of the power output shaft 12, the force during surgical operations can be effectively dispersed and borne, reducing the direct friction between the power output shaft 12 and the front fixing sleeve 2, and extending the service life of the components.

[0054] In an embodiment of the present utility model, please refer to Figure 3 , the "at least one component" in the above description further includes a pressing plate 4. Both the pressing plate 4 and the bearing 5 are arranged in the installation space 22, and the front fixing sleeve 2 presses the pressing plate 4 against the front end of the cylindrical main body 11; the first sealing member 3 is arranged axially between the pressing plate 4 and the bearing 5. Whether the part of the motor end face corresponding to the periphery of the power output shaft 12 is flat or not, the presence of the pressing plate 4 can fix the bearing 5 and the first sealing member 3 in the axial direction, reduce the axial movement during the surgical operation, and improve the overall stability of the handle. Moreover, the front fixing sleeve 2 presses the pressing plate 4 against the front end of the cylindrical main body 11, effectively preventing the pressing plate 4 and the bearing 5 from loosening during the surgical operation and ensuring the long-term reliability of the handle. Optionally, the bearing 5 is an oil-impregnated bearing. In this way, the cooperation of the oil-impregnated bearing and the first sealing member 3 forms an internal and external isolation for the cylindrical main body 11. After long-term use, the motor 1 can still maintain good performance, and the direct drive of the motor is easier to achieve rotational control, without hysteresis, higher transmission efficiency, and longer service life.

[0055] In another possible embodiment, please refer to Figure 3 , the motor assembly 100 further includes a second sealing member 6 arranged in the installation space 22, and the front fixing sleeve 2 is provided with an annular groove 21 with an opening facing away from the cylindrical main body 11, and the second sealing member 6 is arranged in the annular groove 21. The presence of the second sealing member 6 provides additional sealing protection for the motor assembly 100. When the motor assembly 100 is installed in the housing of the handle, the second sealing member 6 contacts the inside of the handle housing, which can prevent the front-end waste liquid and tissue fluid from seeping into the inside of the motor 1 along the gap between the front fixing sleeve 2 and the motor 1, and together with the first sealing member 3 forms a sealing system, greatly enhancing the waterproof and dustproof capabilities.

[0056] The present utility model also proposes a medical handle 200, please refer to Figure 6 , the medical handle 200 includes a handle body 01 and a motor assembly 100. Among them, a cavity is formed inside the handle body 01, and the motor assembly 100 is defined to be arranged in the cavity. The specific structure of the motor assembly 100 refers to the above embodiment. Since this medical handle 200 adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0057] In an embodiment of the present utility model, an axial limiting step surface is provided in the cavity, and the front fixing sleeve 2 of the motor assembly 100 abuts against the axial limiting step surface. The axial limiting step surface provides precise axial positioning for the motor assembly 100, effectively preventing the motor assembly 100 from loosening during long-term use or strong vibration, ensuring the stable position of the motor assembly 100 in the surgical handle, and reducing axial movement during surgical operations. By the abutment of the front fixing sleeve 2 against the axial limiting step surface, the assembly accuracy between the motor assembly 100 and the handle body is improved, ensuring the overall performance of the surgical handle.

[0058] In an embodiment of the present utility model, please refer to Figure 6 , the medical handle 200 further includes a locking sleeve 7, and the locking sleeve 7 is provided at the end of the handle body 01 to limit the motor assembly 100 in the cavity. Specifically, after the motor assembly 100 is placed inside the handle body 01, a locking sleeve 7 can also be provided at the end of the handle body 01. The combined cooperation of the locking sleeve 7 and the front fixing sleeve 2 can limit the motor assembly 100 in the axial direction and prevent it from moving out of position during use. For example, an internal thread can be provided at the end of the handle body 01, and an external thread can be provided on the outer circumference of the locking sleeve 7, and the locking sleeve 7 is threadedly connected to the end of the handle body 01, thereby achieving the effect of fixing the motor assembly 100 inside the handle body 01.

[0059] In an embodiment of the present utility model, a keyway is provided on the inner wall of the cavity, a positioning key is provided on the outer wall of the motor 1, and the positioning key cooperates with the keyway, ensuring precise radial positioning of the motor 1 in the cavity, avoiding radial deviation during installation or operation, and improving the overall radial accuracy of the surgical handle.

[0060] Optionally, in another embodiment of the present utility model, a first keyway is provided on the inner wall of the cavity, a second keyway is provided on the outer wall of the motor 1, and the medical handle 200 further includes a positioning key, and the positioning key cooperates with the first keyway and the second keyway respectively. The setting of the first keyway and the second keyway can provide double radial positioning for the motor 1, preventing the motor 1 from rotating radially during surgical operations, ensuring the consistency and reliability of power output. The cooperation of the positioning key with the two keyways reduces the radial relative movement of the motor 1 and effectively extends the service life of the motor assembly 100 and the medical handle 200. It should be noted that the number of positioning keys can be set to multiple according to actual needs, and the multiple positioning keys are evenly spaced along the axial direction of the motor 1; in addition, the shape of the positioning key is not specifically limited and can be adjusted adaptively according to needs.

[0061] The present utility model further provides a surgical power device, which includes a medical handle 200 and a medical tool that are adapted to each other. The specific structure of the medical handle 200 refers to the above embodiments. Since the medical handle 200 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. It should be noted that the type of the surgical tool is not specifically limited. For example, it can be an electric scalpel, a surgical forceps or an electric drill, etc.

[0062] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A motor assembly, characterized in that, The motor assembly includes: A motor, which includes a cylindrical main body and a power output shaft rotatably disposed within the cylindrical main body. The power output shaft has an extending section that extends out of the front end of the cylindrical main body, and a channel is formed axially through the interior of the power output shaft; and A front fixing sleeve detachably connected to the front end of the cylindrical main body, and an installation space is formed at an interval between the outer wall of the extending section and the inner wall of the front fixing sleeve. At least one component is provided between the extending section and the front fixing sleeve, and the installation space is used to accommodate the component.

2. The motor assembly according to claim 1, characterized in that, The cylindrical main body includes a main body section and a front docking section provided at the front end of the main body section; Wherein, at least a part of the front docking section is provided with threads, and the front fixing sleeve is threadedly connected to the front docking section; and / or, The outer diameter of the front docking section is smaller than the outer diameter of the main body section, and the threads extend axially along the front docking section; and / or, The maximum outer diameter of the front fixing sleeve is equal to the outer diameter of the main body section.

3. The motor assembly according to claim 1, wherein The at least one component includes a first seal, which is disposed within the installation space, and the first seal is in sealing contact with the inner wall of the front fixing sleeve and the outer wall of the extending section respectively.

4. The motor assembly according to claim 3, wherein, The at least one component further includes a pressing plate and a bearing. The pressing plate and the bearing are both disposed within the installation space, and the front fixing sleeve presses the pressing plate against the front end of the cylindrical main body; the first seal is axially disposed between the pressing plate and the bearing.

5. The motor assembly according to claim 1, characterized in that, The motor assembly further includes a second seal disposed within the installation space. The front fixing sleeve is provided with an annular groove with an opening facing away from the cylindrical main body, and the second seal is disposed within the annular groove.

6. The motor assembly according to claim 1, wherein The at least one component further includes a bearing disposed within the installation space. The bearing is disposed inside the front fixing sleeve and sleeved on the outer periphery of the power output shaft.

7. A medical handle, characterized in that, The medical handle includes: A handle body with a cavity formed inside; and A motor assembly disposed within the cavity, and the motor assembly is the motor assembly according to any one of claims 1 to 6.

8. The medical handle according to claim 7, wherein, An axial limiting step surface is provided within the cavity, and the front fixing sleeve of the motor assembly abuts against the axial limiting step surface; and / or, The medical handle further includes a locking sleeve disposed at the end of the handle body to limit the motor assembly within the cavity.

9. The medical handle according to claim 7, wherein A key groove is provided on the inner wall of the cavity, and a positioning key is provided on the outer wall of the motor, and the positioning key cooperates with the key groove; Or, A first key groove is provided on the inner wall of the cavity, a second key groove is provided on the outer wall of the motor, and the medical handle further includes a positioning key that cooperates with the first key groove and the second key groove respectively.

10. A surgical power device, characterized in that, The surgical power device includes a medical handle and a medical tool that are adapted to each other, and the medical handle is the medical handle according to any one of claims 7 to 9.

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