WO2021244507A1

WO2021244507A1 - Sealing device for electric motor

Info

Publication number: WO2021244507A1
Application number: PCT/CN2021/097597
Authority: WO
Inventors: 谭任木; 杨军; 王磊
Original assignee: 上海逸思医疗科技股份有限公司
Priority date: 2020-06-03
Filing date: 2021-06-01
Publication date: 2021-12-09
Also published as: CN113765269A

Abstract

Provided is a sealing device for an electric motor, the sealing device comprising: a sleeve, which is formed integrally or in combination and sheathes outside an electric motor together with a base so as to achieve sealing for the whole electric motor, with an electric motor output shaft extending out of one end of the sleeve, and the base being arranged at the other end of the sleeve; sealing mechanisms, which are respectively arranged between the sleeve and the electric motor and between the sleeve and the base to perform end sealing for the two ends of the electric motor; and a positioning mechanism, by which the electric motor is positioned in axial and circumferential directions. The present invention further provides a surgical instrument. The electric motor sealing device proposed by the present invention can improve the sealing performance of an electric motor, and can meet the requirements for repeated cleaning, disinfection and sterilization of reusable instruments.

Description

Motor sealing device

Technical field

The invention belongs to the technical field of motor sealing, and relates to a sealing device, in particular to a motor sealing device.

Background technique

The drive motor used in electric surgical instruments usually consists of two parts: a motor and a gearbox. The motor is driven by the control signal and energy input by the wire, and the gearbox outputs torque through the output shaft. Under normal circumstances, there are challenges in the sealing of these places, such as the threaded connection usually adopted by the motor and the reduction gearbox, the support bearing at the output shaft end of the reduction gearbox, the components and outlets on the motor base, and so on. During the cleaning, disinfection, and sterilization of reusable surgical instruments, if acid gas, water vapor, disinfectant, etc. enter the motor, the internal components of the motor will corrode, short-circuit and other faults, which may cause the motor to work abnormally or stop working .

The common motor sealing structure uses seals to seal the motor output shaft and motor fasteners one by one, and uses glue to fill and encapsulate the motor output. Reusable surgical instruments may need to withstand a variety of sterilization methods, such as common high-temperature steam sterilization, which needs to meet the air tightness requirements of about 2bar and the temperature resistance requirements of about 134 degrees Celsius; common low-temperature hydrogen peroxide plasma Sterilization, due to the corrosive nature of acid gases, the requirements for sealing devices are extremely high.

However, the current common motor sealing structure, as shown in Figure 1 to Figure 2, generally uses an end cover 03 with a sealing ring 05 to seal the output shaft 021, between the end cover 03 and the reduction box 02, and between the reduction box 02 and the motor 01 Glue is used for bonding and sealing, and the motor outlet 011 is sealed with glue. The glue infusion sealing area is the area 012 shown in the box. The sealing of glue has higher requirements on the surface performance of the material, and because the sealing structure has multiple glue seals, so As long as one of them fails, it will cause liquid to enter the motor, causing the circuit to be short-circuited and burned or the motor malfunctions.

In view of this, there is an urgent need to design a new motor sealing method to overcome the above-mentioned shortcomings of the existing motor sealing method.

Summary of the invention

The invention provides a motor sealing device, which can not only improve the sealing performance of the motor, but also meet the requirements of multiple cleaning, disinfection and sterilization of reusable surgical instruments.

To solve the above technical problems, the technical solutions adopted by the present invention include:

A motor sealing device, which includes:

The sleeve is integrally formed or combined, and is sleeved on the outside of the motor together with the base to seal the motor as a whole; the output shaft of the motor extends out of the first end of the sleeve, and the base is provided on the first end of the sleeve. Two ends

The sealing mechanism is arranged between the output shaft of the motor and the sleeve, and between the base and the sleeve to seal both ends of the motor;

The positioning mechanism performs circumferential and axial positioning of the motor.

As an embodiment of the present invention, the first sealing mechanism includes a first sealing groove arranged on the inner wall of the sleeve and/or the outer wall of the motor output shaft and a first sealing groove arranged in the first sealing groove. The sealing element, the first sealing element and the first sealing groove are in interference fit to realize the dynamic sealing of the output shaft of the motor.

As an embodiment of the present invention, the sealing mechanism further includes a second sealing mechanism provided between the sleeve and the base, and the second sealing mechanism includes a second sealing groove and a second sealing element, The second sealing groove is provided on the inner wall of the sleeve and/or the outer wall of the base, and the second sealing element is provided in the second sealing groove and is in interference fit with the second sealing groove to By statically sealing the bottom cover, the other end of the motor is sealed.

As an embodiment of the present invention, the first sealing element is a first sealing ring, the wire diameter of the first sealing ring is greater than the depth of the first sealing groove, and the second sealing element is a second sealing ring. The wire diameter of the second sealing ring is greater than the depth of the second sealing groove. Wherein, the wire diameter of the second sealing ring is the difference between the inner and outer diameters of the second sealing ring, and the depth of the first sealing groove can be extended to include the gap between the output shaft of the motor and the sleeve.

As an embodiment of the present invention, the positioning mechanism includes a circumferential positioning mechanism and an axial positioning mechanism, the circumferential positioning mechanism positions the sleeve and the motor in the circumferential direction, and the axial positioning mechanism is positioned at The sleeve and the motor are positioned axially.

As an embodiment of the present invention, the circumferential positioning mechanism includes a positioning protrusion and a positioning groove corresponding to the positioning protrusion. The positioning protrusion is inserted into the positioning groove to position the motor and the sleeve. In the relative position in the circumferential direction, the positioning groove is provided on the sleeve and/or the motor, and the positioning protrusion is a protrusion provided on the sleeve or on the motor or used alone. That is, when the positioning protrusion is provided on the sleeve, the positioning groove is provided on the motor, or when the positioning groove is provided on the sleeve, the positioning protrusion is provided on the motor, or the motor and the sleeve are separately provided There are positioning grooves, by inserting the positioning protrusions of the positioning pins into the positioning grooves on the motor and the sleeve respectively, the positioning of the motor in the circumferential direction is realized. Preferably, the positioning protrusion is integrally formed or assembled with the sleeve or the motor; in a preferred embodiment, the positioning protrusion is a positioning pin provided in a blind hole on the inner wall of the sleeve, The positioning groove is a groove provided on the motor for the positioning protrusion to be inserted into.

As an embodiment of the present invention, the axial positioning mechanism includes a clamping groove provided on the output shaft of the motor and a clamping member that cooperates with the clamping groove, and the clamping member is connected to the sleeve of the sleeve. The top end is inserted into the clamping groove, and the sleeve motor is positioned in the axial direction. Preferably, the clamping member is a circlip that can prevent the motor output shaft and the sleeve from slipping off in the axial direction, and can tightly fix the motor output shaft and the sleeve in the axial direction.

As an embodiment of the present invention, the axial positioning mechanism further includes a first positioning hole provided on the inner wall of the end portion of the sleeve far away from the output shaft of the motor, and a first positioning hole provided on the base corresponding to the first A second positioning hole of a positioning hole, the base is fixedly connected to the sleeve through the cooperation of the fastener with the first positioning hole and the second positioning hole. Preferably, the fastener is a screw, the first positioning hole is a waist-shaped hole, a tightly fitted short shaft in the axial direction, and a loosely fitted long shaft in the circumferential direction, so as to achieve axial tightening and circumferential direction. Relax processing and coordination requirements.

As an embodiment of the present invention, the axial positioning mechanism further includes an elastic protrusion provided on the inner wall of the end of the sleeve away from the motor output shaft and provided on the outer wall of the base corresponding to the The positioning groove of the elastic protrusion, when the motor and the base are put into the sleeve together, the elastic protrusion is inserted into the positioning groove, and the base is clamped to the sleeve.

As an embodiment of the present invention, a guide rib is further provided on the outer wall of the base, a guide groove corresponding to the guide rib is provided on the sleeve, and the guide rib moves axially along the guide groove , The motor is installed in the sleeve together with the base.

As an embodiment of the present invention, the end of the motor opposite to the output shaft of the motor is provided with a first adapter, and the base is provided with a corresponding one end of the first adapter. The second adapter part and the insertion hole matched with the male pin and the female pin, a part of the second adapter part is injection molded into the base to form a sealed package, and the other part of the second adapter part Connect with wires and form insulation through glue pouring to realize electrical protection.

As an embodiment of the present invention, a connecting elastic piece is placed in the insertion hole, and the first adapter piece is connected to the second connecting piece through the connecting elastic piece. Preferably, a crown spring or a claw spring is placed in the insertion hole, the first adapter is a male pin, the second adapter is a female pin, and the female pin passes through the crown To connect the spring or claw spring to the male pin, the exposed part of the female pin and the solder joints are filled with high temperature resistant epoxy resin, and the epoxy resin must wrap the solder joints to form an insulating and waterproof electrical Safety protection to protect the motor from acid gas, water vapor, disinfectant, etc., to meet the service life of reusable surgical instruments.

In the present invention, during pre-assembly, the first sealing ring is pre-installed in the first sealing groove; after the base and the female pins are co-injected, the female pins on the base are connected to the wires, and then glue is poured, and the first The second sealing ring is pre-installed in the second sealing groove; and when assembling, the elastic gasket is sleeved on the motor output shaft, the male pin of the motor is connected with the female pin on the base, and the base and the motor are formed as a whole It is installed in the sleeve, and the position of the motor in the sleeve is positioned in the circumferential and axial directions through the positioning mechanism.

The present invention also includes a surgical instrument, which includes: the above-mentioned surgical instrument.

The beneficial effect of the present invention is that the motor sealing device proposed by the present invention can improve the sealing performance of the motor and can meet the requirements of multiple cleaning, disinfection and sterilization of reusable instruments. The invention adopts the integral sealing sleeve and the base to realize the sealing of the motor, which reduces the sealing between the end cover and the reduction box, the reduction box and the motor and other parts; at the same time, the pin is used as the transfer interface of the motor outlet, and the motor is outlet. The sealing of the pin is transformed into the sealing of the pin. At the same time, the pin and the end cover adopt an injection molding process, which avoids the extremely unreliable sealing method of glue sealing, and realizes a simple, reliable, and low-cost sealing effect.

Description of the drawings

Figure 1 is an overall schematic diagram of the prior art.

Figure 2 is an internal schematic diagram of the prior art.

Fig. 3 is an overall schematic diagram of a sealing device in an embodiment of the present invention.

Fig. 4 is an internal schematic diagram of the sealing device in an embodiment of the present invention.

Fig. 5 is a schematic diagram of the structure of a motor in an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a sleeve in an embodiment of the present invention.

FIG. 7 is a schematic diagram of the structure of the female pin of the base in an embodiment of the present invention.

Fig. 8 is a schematic diagram of the base structure in an embodiment of the present invention.

Fig. 9 is a schematic diagram of assembly processing of a sleeve in an embodiment of the present invention.

detailed description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In order to further understand the present invention, the preferred embodiments of the present invention will be described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

The description in this part is only for a few typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. The mutual replacement of the same or similar existing technical means and some technical features in the embodiments is also within the scope of the description and protection of the present invention.

The present invention discloses a motor sealing device. Figures 3 and 4 are structural schematic diagrams of the sealing device in an embodiment of the present invention; please refer to Figures 3 and 4, in an embodiment of the present invention, the motor sealing device Including: sleeve 2, sealing mechanism, positioning mechanism and base 3. The sealing mechanism includes a first sealing mechanism and a second sealing mechanism that seal both ends of the motor, and the positioning mechanism includes a circumferential positioning mechanism and an axial positioning mechanism of the motor.

The sleeve 2 is sleeved on the outside of the motor to seal the motor as a whole; in this preferred embodiment, an integrally sealed sleeve 2 is used to seal the motor assembly 1.

The sleeve 2 includes a first end and a second end that are arranged oppositely. The first end of the sleeve 2 is provided with a through hole, the power supply shaft 13 extends, and the base 3 is provided on the second end of the sleeve 2. The first sealing mechanism is arranged at the contact point between the first end of the sleeve 2 and the output shaft 13 of the motor, so as to realize dynamic sealing of the rotation movement of the output shaft 13 of the motor. Specifically, the first end of the sleeve 2 is provided with a first sealing groove 21, and correspondingly, the motor output shaft 13 is provided with a first sealing ring 7 corresponding to the first sealing groove 21, and the first sealing ring 7 The sealing ring 7 is arranged in the first sealing groove 21. Since the wire diameter of the first sealing ring 7 is larger than the maximum distance from the first sealing groove 21 to the outer wall of the corresponding motor output shaft 13, when the motor output shaft 13 After passing through the through hole of the sleeve, the first sealing ring 7 is deformed. At this time, the first sealing ring 7 arranged in the first sealing groove 21 is in interference fit with the motor output shaft 13 to realize the alignment of the motor output shaft. 13 Rotating dynamic seal.

Further, a second sealing groove 34 is provided at the connection between the base 3 and the sleeve 2, and a second sealing mechanism is provided in the second sealing groove 34. In an embodiment, the second sealing mechanism is the second sealing ring 9; the wire diameter of the second sealing ring 9 is greater than the distance from the outer diameter of the second sealing groove 34 of the base 3 to the inner diameter of the sleeve 2, The static sealing of the base 3 is realized.

The circumferential positioning mechanism connects the sleeve 2 and the motor respectively, and positions the sleeve 2 and the motor in the circumferential direction; the axial positioning mechanism connects the sleeve 2 and the motor output shaft 13, respectively. The sleeve and the base 3 fasten the sleeve 2 and the motor output shaft 13 in the axial direction.

In an embodiment, the circumferential positioning mechanism includes at least two positioning pins 6. The sleeve 2 is provided with a positioning groove for inserting one end of the corresponding positioning pin (ie, the positioning hole 23 in FIG. 6). ), and a groove (round hole 14) provided on the motor for inserting the other end of the positioning pin. In an embodiment, each positioning hole 23 is a blind hole; the number of positioning pins 6 can be 2, 3, 4, etc., which can be specifically set according to needs. In one embodiment, the output shaft end of the motor assembly 1 is provided with three circular holes 14. As shown in FIG. 6, three positioning holes 23 are provided on the sleeve 2. As shown in FIG. 4, the positioning pin 6 is placed on the motor. In the circular hole 14, when the motor is installed in the sleeve 2, the positioning pin 6 will fall into the positioning hole 23 of the sleeve 2, so that the positioning pin 6 can be installed on the sleeve 2 to realize the circumferential positioning of the motor . Preferably, the positioning hole 23 on the sleeve 2 can be set as a waist-shaped hole, considering that the function of the positioning hole 23 is to limit the rotational movement of the motor assembly 1, that is, only circumferential locking is required, and radial locking is not required, so the shaft The direction is a tight fit, and the diameter is a loose fit, so as to reduce the processing and matching requirements of the positioning hole 23.

4 and 5 again, in an embodiment of the present invention, the axial positioning mechanism includes a clamping groove 15 provided on the motor output shaft 13 and a clamping spring 8 inserted into the clamping groove, and the clamping The spring 8 is inserted into the clamping groove along the top of the sleeve to fix the motor output shaft 13 in the axial direction. In an embodiment, in the axial direction, the base 3 and the sleeve 2 are fixed by at least two screws (of course, other fixing mechanisms can also be used), so as to realize the positioning of the motor in the axial direction; specifically, the The second end of the sleeve 2 is provided with at least two threaded holes 24 (of course, other fixing auxiliary mechanisms can also be used), the corresponding position of the base 3 is provided with at least two second positioning holes 32, and the screw 10 passes through the corresponding second The positioning hole 32 is matched with the corresponding threaded hole 24 to fasten the base 3 to the sleeve 2, and the base 3 abuts the lower end of the motor 1, and finally achieves the positioning of the motor in the axial direction. The second positioning hole 32 of the base 3 can be set as a waist-shaped hole; the waist-shaped hole is a tightly fitted short axis in the axial direction, and a loosely fitted long axis in the circumferential direction to achieve axial tightening, Circumferential relaxation of processing and coordination requirements.

6 is a schematic diagram of the structure of the sleeve in an embodiment of the present invention, and FIG. 8 is a schematic diagram of the base structure in an embodiment of the present invention; please refer to FIGS. 6 and 8, in an embodiment of the present invention, the base 3 is provided with There is at least one guide rib 33, the sleeve 2 is provided with at least one guide groove 22; the guide rib 33 is arranged corresponding to the corresponding guide groove 22; each guide rib 33 is provided with a second positioning hole 32, and the threaded hole 24 is provided in each In the guide groove 22, the base 3 and the sleeve 2 are fixed by a tightening screw 10 (or other tightening mechanism), so as to realize the positioning of the motor in the circumferential direction and the axial direction. In one embodiment, there are three guide ribs 33 on the side of the base 3 corresponding to the three guide grooves 22 on the sleeve 2, and at least a pair of guide ribs 33 and the correspondingly installed guide grooves 22 are installed with a thickness greater than that of the other guide ribs. The installation thickness of 33 and the corresponding installation guide groove 22 realizes the foolproof installation direction, that is, the base 3 can only enter the sleeve 2 at a fixed angle. Specifically, when the base 3 enters to the bottom along the guide groove 22 on the sleeve 2, the positioning hole 32 coincides with the axis of the threaded hole 24 on the sleeve 2. At this time, the set screw 10 is installed on the sleeve 2. Realize the fastening of the sleeve and the base 3.

In an embodiment of the present invention, the base 3 is provided with a female pin 31 that can be matched with the motor male pin 16 and a socket hole that realizes the mating of the motor male pin 16 and the female pin 31. An electric wire 4 is connected to the pin 31.

Please continue to refer to FIG. 4, in one embodiment, the base 3 is provided with female pins 31. Preferably, the female pins 31 can be embedded in the base 3 through an injection molding process to form a sealed package; on the base 3 After the female pin 31 of the base 3 is welded to the wire 4, it is then glued to form insulation protection; specifically, after the female pin 31 of the base 3 is welded to the wire 4, use high-temperature glue (preferably, a high-temperature ring Oxygen resin) Pouring and wrapping the exposed parts of the female pins and solder joints to form insulation and waterproof electrical safety protection. Preferably, the height of the pouring must be higher than the solder joint (for example, the height is 3~5mm, the pouring area is shown in the box area in Figure 4).

FIG. 7 is a schematic diagram of the structure of the female pin of the base in an embodiment of the present invention; please refer to FIG. 7, in an embodiment of the present invention, the base 3 and the motor outlet 4 need to be sealed. As shown in FIG. 7, there are three second positioning holes 32 on the side of the base 3, corresponding to the three threaded holes 24 on the bottom of the sleeve 2, and tightening screws 10 are used for fastening. The base 3 is made of high temperature resistant plastic, and the female pin 31 is sealed and packaged with a certain pressure through an appropriate temperature and pressure injection molding process; the female pin 31 on the base 3 and the male pin 16 of the motor are in the socket A connecting elastic piece 312 is placed, and the connection with the male pin 16 is realized through the connecting elastic piece 312; the other end of the female pin 31 is provided with a slot 313, and the wire 4 is inserted into the slot 313 for welding, and the wire 4 is filled with glue. The solder joints with the female pins 31 are protected to realize electrical protection.

In one embodiment, the base 3 is made of high temperature resistant resin such as PPSU, and the base of the female pin 31 is made of brass. Preferably, the surface of the female pin 31 can be plated with gold to prevent corrosion and better realize electrical connection. During injection molding, the female pins 31 are placed on the mold and fixed, and several female pins 31 are pre-embedded for injection molding through reasonable process parameters. The plastic wraps the female pins 31 under a certain pressure to form an effective sealed package. The female pin 31 penetrates through the base 3, the mating side is flush with the base, and the welding side is higher than the base by a certain distance. The arrangement of the female pins 31 corresponds to the arrangement of the male pins 16 of the motor to realize the connection. As shown in FIG. 7, a connecting elastic piece 312 and the like are placed in the insertion hole 311 where the female pin 31 and the male pin 14 are butted to realize the plug connection with the male pin 14 of the motor. Preferably, the connecting elastic piece can adopt a crown spring or a claw spring structure, and its material can be beryllium copper. The advantage of using the connecting elastic piece 312 is: when docking, the female pin 31 and the male pin 16 have a small deviation, and the male pin 16 presses one side of the connecting elastic piece 312, and good electrical performance can still be achieved at this time. connect.

Figure 9 is a structural diagram of a sleeve in an embodiment of the present invention; please refer to Figure 9, in another embodiment of the present invention, the sleeve 2 includes an end cap 91, a round tube 92, a bottom end 93, each part They are processed by respective suitable processes, and then connected as a whole by welding. In one embodiment, each part is processed separately according to the most suitable technology, such as powder sintering, machining, etc., and then connected as a whole by welding to form a sleeve assembly with high temperature resistance and air tightness requirements.

During pre-assembly, first pre-install the first sealing ring 7 in the first sealing groove 21 of the sleeve; after the base 3 and the female pins 31 are co-injected, the female pins 31 on the base 3 and the wires 4 are welded , And then glue pouring, and then pre-install the second sealing ring 9 in the second sealing groove.

When assembling, in this embodiment, first, the elastic gasket 5 is sleeved on the output shaft 13 of the reduction gear box to eliminate the axial gap between the motor assembly 1 and the sleeve after the base 3 is installed. Place the three positioning pins 6 in the corresponding mounting holes 14 of the motor gearbox. The male pins 16 of the motor and the female pins on the base 3 are connected to each other, and then they are integrated into the sleeve 2. The process of assembling the sleeve 2 is to align the guide rib 33 of the base 3 with the guide groove 22 of the sleeve 2, and the motor assembly 1 is assembled in the sleeve 2 along the guide groove 22 along with the guide rib 33. When the motor assembly 1 is assembled to the bottom At this time, the positioning pin 6 on the motor assembly 1 will be inserted into the corresponding positioning hole 23 in the sleeve 2. There are three threaded holes 24 on the bottom outer surface of the sleeve 2, and the set screw 10 is installed on it, and the base 3 is pressed. , Until the end surface of the guide rib 33 is limited to the end surface of the guide groove 22 of the sleeve 2, and then install the set screw 10; meanwhile, install the circlip 8 on the slot 15 on the motor output shaft 13 to complete the final installation. In an example, the number of threaded holes 24 is not limited.

In order to achieve mechanical output, the shaft output end of the gearbox needs to be effectively tightened. Three positioning pins 6 and a circlip 8 are used to lock the motor circumferentially and axially, instead of conventional screw fastening. In an example, the number of positioning pins 6 and circlips 8 is not limited. In the present invention, because the positioning hole 23 provided on the sleeve 2 that matches the positioning pin 6 is a blind hole, that is, the sleeve 2 does not need to provide a passage through the inner and outer walls of the positioning pin 6, so the positioning pin 6 does not need to be sealed. Specifically, the output shaft 13 (also the motor output shaft 13) of the reduction box 12 and the sleeve 2 are respectively provided with a number of positioning holes. Through the cooperation of a number of positioning pins 6 and the positioning holes, the reduction of the reduction box 12 and the sleeve 2 is realized. Circumferentially fixed. Again as shown in Figure 5, the output shaft 13 of the reduction box 12 is provided with a slot 15 at the position where the sleeve 2 is just exposed, and the circlip 8 is installed on it to realize the axial fixation of the reduction box 12 and the sleeve 2. .

In summary, the motor sealing device proposed in the present invention can improve the sealing performance of the motor, and can meet the needs of multiple cleaning, disinfection and sterilization of reusable instruments, such as high-temperature steam sterilization, hydrogen peroxide low-temperature plasma sterilization, etc. ; The present invention adopts an integral sealing sleeve to seal the motor, which reduces the sealing between the end cover and the reduction box, the reduction box and the motor and other parts; at the same time, the pin is used as the transfer interface of the motor outlet to seal the motor outlet It is transformed into a pin seal, and the pin and the end cover adopt an injection molding process, which avoids the extremely unreliable sealing method of glue seal, and realizes a simple, reliable, and low-cost sealing effect.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The description and application of the present invention here are illustrative, and it is not intended to limit the scope of the present invention to the above-mentioned embodiments. Modifications and changes of the embodiments disclosed herein are possible, and replacements and equivalent components of the embodiments are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that, without departing from the spirit or essential characteristics of the present invention, the present invention can be implemented in other forms, structures, arrangements, ratios, and other components, materials, and parts. Without departing from the scope and spirit of the present invention, other modifications and changes can be made to the embodiments disclosed herein.

Claims

A motor sealing device, characterized in that the motor sealing device includes:

The sleeve is integrally formed or combined, and is sleeved on the outside of the motor together with the base to seal the motor as a whole; the motor output shaft extends out of the first end of the sleeve, and the base is provided on the second end of the sleeve. end;

The sealing mechanism is respectively arranged between the sleeve and the output shaft of the motor and the base, and seals both ends of the motor;

The positioning mechanism performs circumferential positioning and axial positioning of the motor.
The motor sealing device according to claim 1, wherein:

The sealing mechanism includes a first sealing mechanism provided between the motor output shaft and the sleeve, and the first sealing mechanism includes a first sealing mechanism provided on the inner wall of the sleeve and/or the outer wall of the motor output shaft. A sealing groove and a first sealing element arranged in the first sealing groove, the first sealing element and the first sealing groove are interference fit.
The motor sealing device according to claim 2, characterized in that:

The sealing mechanism further includes a second sealing mechanism provided between the sleeve and the base, the second sealing mechanism includes a second sealing groove and a second sealing member, and the second sealing groove is provided in the On the inner wall of the sleeve and/or the outer wall of the base, the second sealing element is arranged in the second sealing groove and is in interference fit with the second sealing groove.
The motor sealing device according to claim 2 or 3, characterized in that:

The first sealing element is a first sealing ring, the wire diameter of the first sealing ring is greater than the depth of the first sealing groove, the second sealing element is a second sealing ring, and the diameter of the second sealing ring is The wire diameter is greater than the depth of the second sealing groove.
The motor sealing device according to claim 1, wherein:

The positioning mechanism includes a circumferential positioning mechanism and an axial positioning mechanism, the circumferential positioning mechanism positions the sleeve and the motor in the circumferential direction, and the axial positioning mechanism positions the sleeve and the motor in the axial direction. The motor.
The motor sealing device according to claim 5, wherein:

The circumferential positioning mechanism includes a positioning protrusion and a positioning groove corresponding to the positioning protrusion. The positioning protrusion is inserted into the positioning groove to locate the relative position of the motor and the sleeve in the circumferential direction. The positioning groove is provided on the sleeve and/or the motor, and the positioning protrusion is a protrusion provided on the sleeve or on the motor or used alone.
The motor sealing device according to claim 5, wherein:

The axial positioning mechanism further includes a first positioning hole provided on the inner wall of the end of the sleeve away from the output shaft of the motor, and a second positioning hole provided on the base corresponding to the first positioning hole, Through the cooperation of the fastener with the first positioning hole and the second positioning hole, the base is screwed to the sleeve.
The motor sealing device according to claim 5 or 7, characterized in that:

The axial positioning mechanism further includes a clamping groove provided on the output shaft of the motor and a clamping member matched with the clamping groove, the clamping member is inserted into the clamping groove at the top end of the sleeve, The sleeve and the motor are positioned in the axial direction.
The motor sealing device according to claim 5 or 7, characterized in that:

The axial positioning mechanism further includes an elastic protrusion provided on the inner wall of the second end of the sleeve and a positioning groove provided on the outer wall of the base corresponding to the elastic protrusion, connecting the motor and the base When they are put into the sleeve together, the elastic protrusion is inserted into the positioning groove, and the base is clamped to the sleeve.
The motor sealing device according to claim 1, wherein:

The outer wall of the base is also provided with a guide rib, and the sleeve is provided with a guide groove corresponding to the guide rib, the guide rib moves axially along the guide groove, and the motor and the base work together Put into the sleeve.
The motor sealing device according to claim 1, wherein:

The end of the motor opposite to the output shaft of the motor is provided with a first adaptor, and the base is provided with a second adaptor that can be matched with one end of the first adaptor, and The first adapter and the second adapter are mated with the sockets, a part of the second adapter is injection molded and embedded in the base to form a sealed package, and the other part of the second adapter is connected to the wire , And form insulation through glue pouring.
The motor sealing device according to claim 11, wherein:

A connecting elastic piece is placed in the insertion hole, and the first adapter piece is connected to the second connecting piece through the connecting elastic piece.
A surgical instrument, characterized in that it comprises the motor sealing device according to any one of claims 1-12.