Driving assembly and catheter device

Abstract

The utility model provides a driving assembly and a conduit device. In the driving assembly, a first part of a circumferential seam of an upper shell and a top cover and a second part of a sealed circumferential seam (first seam) of the upper shell and a middle shell are integrally formed on the upper shell through a glue injection process (a glue coating process); according to the driving assembly, the combination reliability of the first sealing component and the upper shell is improved, the first sealing component is not prone to displacement, the sealing performance of circumferential seams (first seams) between the upper shell and the top cover and between the upper shell and the middle shell can be improved, and then the overall performance of the driving assembly is improved. And the first sealing part is directly formed on the upper shell, so that the forming is rapid, the production efficiency of the driving assembly is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a driving assembly and a catheter device. BACKGROUND

[0002] The catheter device comprises a driving assembly and a working assembly, the driving assembly is used for driving the working assembly to work, so that the working assembly can pump and suck liquid (such as blood), and the driving assembly is one of important components of the catheter device. The driving assembly usually comprises a shell and a power motor, the power motor is located in the interior of the shell, and the power motor can drive a driving shaft in the working assembly to rotate.

[0003] At present, whether the sealing of the shell is reliable directly affects the use performance of the driving assembly, and this is one of important problems that technicians in the field always pay attention to. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a driving assembly with relatively high sealing reliability. Another purpose of the present application is to provide a catheter device comprising the above driving assembly.

[0005] The present application provides a driving assembly, comprising a shell, the shell has an inner cavity for accommodating a motor, the shell comprises a top cover, an upper shell, a middle shell and a bottom shell, the driving assembly further comprises a first sealing component, the first sealing component comprises a first part, a second part and a connecting part, the upper shell has a first surface supporting the top cover, the first surface is provided with a first glue injection groove with an opening facing the top cover, the first part is at least partially located in the first glue injection groove, and is used for sealing a circumferential joint between the top cover and the upper shell, the second part is located on a side of the first glue injection groove away from the opening, and the second part is used for sealing a circumferential joint between the upper shell and the middle shell; a communication hole is further arranged on a groove wall of the first glue injection groove, the connecting part is located in the communication hole, and the first part is connected to the second part through the connecting part.

[0006] In the embodiment of the present application, the first part of the circumferential joint between the upper shell and the top cover and the second part of the circumferential joint (first joint) between the upper shell and the middle shell are integrally formed on the upper shell through a glue injection process (encapsulation process), the combination reliability of the first sealing component and the upper shell is improved, the first sealing component is not easy to displace, the sealing performance of the circumferential joint (first joint) between the upper shell and the top cover and the circumferential joint (first joint) between the upper shell and the middle shell can be improved, and the overall performance of the driving assembly is improved. Moreover, the first sealing component is directly formed on the upper shell, the forming is rapid, the production efficiency of the driving assembly is improved, and the production cost is reduced.

[0007] In an example, the second part includes a first body portion and a first sealing portion connected to each other, the first body portion is connected to the connecting portion, the first sealing portion is connected to an end of the first body portion away from the connecting portion, the first sealing portion is in abutting sealing with the middle housing, and the first body portion is in abutting with the inner side wall of the upper housing.

[0008] In an example, the first glue injection groove includes a first groove side wall and a second groove side wall, an upper end of the first groove side wall is connected to the inner side wall of the upper housing, the top cover is supported on an end surface of the first groove side wall, a part of the first groove side wall away from the opening is arranged separately from the inner wall of the upper housing, the communication hole is arranged on the first groove side wall, and the first body portion is arranged between the first groove side wall and the inner side wall of the upper housing.

[0009] In an example, a plurality of first reinforcing ribs are further included, all the first reinforcing ribs are arranged at intervals along the circumference of the upper housing, the first glue injection groove further includes a groove bottom wall, and the first reinforcing ribs are connected to the outer wall of the groove bottom wall away from the opening and to the inner side wall of the upper housing through the first body portion.

[0010] In an example, the first body portion includes a plurality of sections, at least one of the sections connects the first part through the connecting portion, each of the sections connects the first sealing portion at an end thereof away from the connecting portion, and an aperture is arranged between two adjacent sections, the aperture penetrates an end surface of the first body portion away from the first sealing portion, and the first reinforcing rib is connected to the inner side wall of the upper housing through the aperture.

[0011] In an example, the first part has a first abutting surface facing the top cover, the first abutting surface is provided with a first protrusion, and the top cover abuts the first protrusion and the first abutting surface at the same time; the second part has a second abutting surface facing the middle housing, the second abutting surface is provided with a second protrusion, and the middle housing abuts the second abutting surface and the second protrusion at the same time.

[0012] In an example, the upper housing further has a first end wall extending inwardly, the middle housing further has a second end wall extending inwardly, the first sealing member further has a first end portion sealing section extending along the axial direction of the motor, the first end portion sealing section extends to an end surface of the first end wall away from the inner cavity and is sealingly arranged between the first end wall and the second end wall.

[0013] In one example, the bottom shell is provided with at least one first bolt seat for fixing the motor, the drive assembly further comprises a second sealing component, the bottom shell is provided with a second glue injection groove, and the second sealing component is at least partially located in the second glue injection groove; the second sealing component comprises a third part and at least one first annular gasket, the third part is connected with each first annular gasket, and the first annular gasket corresponds to the first bolt seat and is arranged on the first bolt seat; the third part is used for sealing a circumferential joint between the bottom shell and the middle shell.

[0014] In one example, the third part comprises a section that is in close contact with the inner wall of the bottom shell.

[0015] In one example, a plurality of second reinforcing ribs are further included, the second reinforcing ribs are arranged at intervals along the circumference of the bottom shell, and the second reinforcing ribs partially pass through the third part to connect the inner wall of the bottom shell.

[0016] In one example, the middle shell further has a second end wall extending inwardly, the bottom shell has a third end wall extending inwardly, the second sealing component is further connected with a second end sealing section extending along the axial direction of the motor, the second end sealing section extends to an end face of the third end wall away from the inner cavity, and is sealingly arranged between the second end wall and the third end wall.

[0017] In one example, a front cover and a third sealing component are further included, the front cover has a central through hole and at least one second bolt seat, the third sealing component comprises a second sealing part, a second annular gasket and an intermediate sealing part, the second annular gasket corresponds to the second bolt seat in a one-to-one manner, and each second annular gasket has a first section and a second section extending outwardly in the outer periphery thereof, the second annular gasket is connected with the second sealing part through the first section, and the second annular gasket is connected with the intermediate sealing part through the second section.

[0018] The second sealing part is sealingly arranged between two end faces of the front cover and the shell in opposite directions, is used for sealing a circumferential joint between the front cover and the shell, and abuts against the first end sealing section and the second end sealing section.

[0019] The second annular gasket is used for sealing a bolt hole in the circumferential direction of the second bolt seat.

[0020] The intermediate sealing part is at least partially arranged between the front cover and the motor shell to at least seal the central through hole in the circumferential direction.

[0021] In one example, the interior of the middle housing has a motor bracket, which includes an arc-shaped wall, a first connecting wall, and a second connecting wall. The arc-shaped wall has a first side and a second side, both of which extend axially along the arc-shaped wall. The first side is connected to the inner wall of the middle housing through the first connecting wall, and the second side is connected to the inner wall of the corresponding side of the middle housing through the second connecting wall.

[0022] Both the first connecting wall and the second connecting wall have a plurality of third reinforcing ribs on their surfaces facing the upper shell, and both the first connecting wall and the second connecting wall have a plurality of fourth reinforcing ribs on their surfaces facing the bottom shell. The third reinforcing ribs are arranged at intervals along the circumference of the middle shell, and the fourth reinforcing ribs are also arranged at intervals along the circumference of the middle shell. The third reinforcing ribs and the fourth reinforcing ribs are also connected to the inner wall of the middle shell, and at least one of the third reinforcing ribs is a hollow structure.

[0023] In one example, the inner surface of the wall of the first injection groove is further provided with several concave portions, and the first part also includes a reinforcing body located within the space enclosed by the concave portions.

[0024] In addition, this application also provides a conduit device, including a working component and a drive component as described in any of the above claims, the drive component being used to drive the drive shaft of the working component to rotate.

[0025] The catheter device in this application embodiment has the driving component of any of the above embodiments, and therefore also has the above-mentioned technical effects of the driving component. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a catheter device according to this application;

[0027] Figure 2 This is a schematic diagram showing the catheter device portion of this application embedded in the heart;

[0028] Figure 3 This is a schematic diagram of the structure of the driving component in one embodiment of this application;

[0029] Figure 4 for Figure 3 A schematic diagram of the end face of the housing in the drive assembly shown;

[0030] Figure 5 for Figure 3 A schematic diagram of the AA cross-section of the drive component shown;

[0031] Figure 6 for Figure 4 Enlarged schematic diagram of point B in the structure shown;

[0032] Figure 7 for Figure 3 The diagram shows the structure of the upper housing in the drive assembly.

[0033] Figure 8 for Figure 3 A schematic diagram of the structure of the first sealing component in the drive assembly shown;

[0034] Figure 9 for Figure 3 The diagram shows the structure of the bottom shell in the drive assembly.

[0035] Figure 10 for Figure 3 A schematic diagram of the structure of the second sealing component injection-molded onto the bottom shell in the drive assembly shown;

[0036] Figure 11 for Figure 9 Mid-bottom shell and Figure 10 A schematic diagram of the structure in which the second sealing component is injection molded as a single unit;

[0037] Figure 12 for Figure 3 The diagram shows the structure of the drive assembly in which the upper housing, middle housing, bottom housing, first sealing component, and second sealing component are assembled together.

[0038] Figure 13 for Figure 3 A schematic diagram of the end face of the driving component shown;

[0039] Figure 14 This is a schematic diagram showing the front cover and the third sealing component forming a single unit.

[0040] Figure 15 This is a schematic diagram showing the third sealing component installed on the end face of the housing.

[0041] in, Figures 1 to 15 The one-to-one correspondence between component names and reference numerals in the attached drawings is shown below:

[0042] 100A drive assembly; 100 housing; 101 first joint; 102 second joint; 103 third joint; 104 fourth joint; 1 top cover; 11 arched structure; 12 heat sink; 2 upper housing; 21 first glue injection groove; 211 first side wall; 212 second side wall; 213 groove bottom wall; 21A communication hole; 22 first reinforcing rib plate; 221 recess; 23 inner side wall of upper housing; 24 first end wall; 241 through hole; 25 first surface; 3 middle housing; 301 inner side wall of middle housing; 30 motor bracket; 31 arc wall; 32 first connecting wall; 33 second connecting wall; 34 third reinforcing rib plate; 341 hollow structure; 342 boss part; 35 fourth reinforcing rib plate; 36 nut column; 37 second end wall; 4 bottom housing; 41 second glue injection groove; 42 first bolt seat; 421 bolt hole; 43 second reinforcing rib plate; 401 inner side wall of bottom housing; 44 third end wall; 5 front cover; 51 third glue injection groove; 52 center through hole; 6 coupling sleeve; 7 motor; 71 motor shell; 8 first sealing part; 81 first part; 811 first abutting surface; 82 second part; 821 first main body part; 8211 section; 822 first sealing part; 8221 second abutting surface; 8222 second protrusion; 823 gap; 83 connecting part; 84 first protrusion; 85 first end sealing section; 86 reinforcing body; 9 second sealing part; 91 third part; 92 first annular gasket; 93 third protrusion; 94 second end sealing section; 95 through hole;

[0043] 10 third sealing part; 1-1 second sealing part; 1-2 second annular gasket; 1-3 intermediate sealing part; 1-4 first section; 1-5 second section; 10A electrical connector.

[0044] 1000 catheter device; 200 coupler; 210 perfusion port; 300 catheter; 400 pump head assembly; 401 flexible support. DETAILED DESCRIPTION

[0045] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0046] Please refer to Figures 1 to 15 , Figure 1 for a structural schematic diagram of a catheter device of the present application; Figure 2 for a schematic diagram of the present application in which the part of the catheter device is built into the heart; Figure 3 for a structural schematic diagram of a drive assembly in an embodiment of the present application; Figure 4 for Figure 3 for an end face schematic diagram of the housing in the drive assembly shown; Figure 5 for Figure 3 for an A-A cross-sectional schematic diagram of the drive assembly shown; Figure 6 for Figure 4An enlarged view of the structure at B in the figure; Figure 7 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 8 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 9 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 10 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 11 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 9 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 10 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 12 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 13 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 3 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 14 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 15 As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure;

[0047] As shown in the figure, the upper shell of the driving assembly is formed in a structure as shown in the figure; Figure 1 The catheter device 1000 can be applied in a scenario of intervention by means of a guide wire. The catheter device comprises a driving assembly 100A, a catheter 300 and a pump head assembly 400. In use, the driving assembly 100A is usually located outside a subject (the subject can be a human body), and the pump head assembly 400 can be intervened in the subject, and the specific installation position can be the left ventricle, for example Figure 2 As shown in the figure, the pump head assembly 400 is used to assist the heart in pumping blood, so as to reduce the burden of the heart. The pump head assembly 400 can assist the left ventricle to work, and pump the blood in the left ventricle into the aorta. Of course, the pump head assembly 400 can also be intervened in other target positions of the subject according to the intervention operation, for example, the pump head assembly 400 is intervened in the left ventricle, and the catheter device 1000 is used to assist the left ventricle to work, and pump the blood in the left ventricle into the aorta. Furthermore, the pump head assembly 400 can also be intervened in a blood vessel or other organs.

[0048] Figure 2The distal end of the pump head assembly 400 is provided with a flexible support 401, which can guide the insertion of the pump housing and other components during the insertion of the pump head assembly 400 into the installation position in the human body. After the pump head assembly 400 and other components are inserted into the desired position in the human body, the flexible support 401 can maintain the posture of the pump head assembly 400 in the heart during the operation of the ventricular assist device, so as not to harm the tissues of the patient. In some embodiments, the distal end of the flexible support 401 is a flexible end which can be supported on the inner wall of the ventricle in a non-invasive or non-injurious manner, and separates the blood inlet of the pump head assembly 400 from the inner wall of the ventricle. The distal end of the flexible support 401 can be in the shape of a circular arc, or the distal end of the flexible support 401 can also be a flexible convex in the shape of a coil, as shown in Figure 1 It should be understood by those skilled in the art that the shapes shown are only exemplary, and the flexible support 401 can have any other appropriate shape as long as the above purposes can be achieved.

[0049] In the embodiment of the present application, the catheter 300 is a hollow structure, and the inside of the catheter 300 is provided with a drive shaft (not shown in the figure). In the embodiment of the present application, the drive assembly 100A includes a housing 100 having an inner cavity accommodating a motor 7. The motor 7 is connected with the coupling sleeve 6, and the drive assembly 100A further includes a through hole for passing through the coupling sleeve 6. The transmission mode of the motor 7 and the drive shaft can adopt a magnetic coupling mode, and the motor 7 is connected together with the proximal end of the catheter and the drive shaft through the coupler 200 and is configured as a power component to provide power. The coupler 200 can be detachably mounted on the drive assembly 100A. Generally, the coupler 200 is further provided with a perfusion port 210, and external perfusion liquid can be injected into the catheter from the perfusion port 210 to flush or lubricate the bearings and other components in the catheter assembly.

[0050] The proximal end of the drive shaft is connected to the power output end of the motor, the distal end of the catheter 300 is connected to the pump head assembly 400, the distal end of the drive shaft is connected to a rotating shaft inside the pump head assembly 400, and an impeller is fixed on the rotating shaft. The motor 7 in the drive assembly 100A rotates to drive the drive shaft to rotate, the drive shaft drives the impeller to rotate, the impeller is driven to rotate to suck blood from the inlet of the pump head assembly 400 into the pump housing inside the pump head assembly 400, and then pump the blood out of the outlet of the pump housing, thereby realizing the pumping and suction of the pump head assembly 400 to the liquid.

[0051] Please refer to Figure 3 In the embodiment of the present application, the housing 100 of the drive assembly 100A includes a top cover 1, an upper housing 2, a middle housing 3 and a bottom housing 4, which are in a split structure. The top cover 1, the upper housing 2, the middle housing 3 and the bottom housing 4 are arranged from top to bottom to enclose an inner cavity accommodating the motor 7. Please refer to Figure 3 and Figure 5The outer wall surface of the top cover 1 can be provided with a concave-convex undulating heat dissipation fin 12. The heat dissipation fin 12 can be arc-shaped, so that the overall outer contour of the top cover 1 is arc-shaped, which is ergonomic and convenient to hold. Please refer to Figure 4 The inner surface of the top cover 1 after assembly is provided with an arch-shaped structure 11 for fixing the motor. The arch-shaped structure 11 is in close contact with the outer wall shape of the motor, which plays a role in limiting and dissipating heat for the motor, can effectively reduce the external vibration of the motor, and transfer the heat of the motor to the outside through the heat dissipation fin 12. The two sides of the arch-shaped structure 11 can be further provided with reinforcing ribs. The number of reinforcing ribs can be two or more than three. The reinforcing ribs can be arranged in the axial direction of the arch-shaped structure 11, for example, reinforcing ribs are arranged at both ends and the middle of the arch-shaped structure 11. The reinforcing ribs can improve the use strength of the arch-shaped structure 11, and also play a role in installation positioning or limiting with the structure on the shell (such as the first reinforcing rib plate 22 provided on the inner wall of the upper shell 2, please refer to Figure 4 The third reinforcing rib plate 34 provided on the inner wall of the middle shell 3). The end surface of the arch-shaped structure 11 provided with an opening can abut against the motor bracket 30 on the middle shell 3.

[0052] In the embodiment of the present application, the driving assembly 100A further includes a first sealing component 8. The first sealing component 8 has elasticity and can be made of rubber. Please refer to Figure 6 The first sealing component 8 includes a first part 81, a second part 82 and a connecting part 83. In combination Figure 4 And Figure 7 It is understood that the upper shell 2 has a first surface 25 supporting the top cover 1. The top cover 1 is circumferentially supported on the first surface 25 of the upper shell 2. The first surface 25 can be a sunken surface. The first surface 25 is provided with a first glue injection groove 21 opening towards the top cover 1. The groove wall of the first glue injection groove 21 is provided with a communication hole 21A. In the present application, the first sealing component 8 is directly formed on the upper shell 2 by glue injection process. When the first sealing component 8 is formed by glue injection, liquid glue is injected into the inside of the first glue injection groove 21. Part of the liquid glue entering the inside of the first glue injection groove 21 is solidified and formed into the first part 81 inside the first glue injection groove 21 and at the opening position of the first glue injection groove 21. Another part of the liquid glue can flow to the outside of the first glue injection groove 21 through the communication hole 21A on the side wall of the first glue injection groove 21, and flow to the inner wall of the upper shell 2. Under the guidance of the flow channel on the inner side wall of the upper shell 2 or the flow channel formed between the mold tooling and the inner side wall of the upper shell 2, this part of the liquid glue can flow to the end of the upper shell 2 away from the top cover 1. The liquid glue flowing out of the first glue injection groove 21 is solidified and formed into the second part 82. The liquid glue located in the communication hole 21A is solidified and formed into the connecting part 83. The first part 81 and the second part 82 are connected through the connecting part 83, so that the first part 81 and the second part 82 can be formed by one-time glue injection, and the connecting part 83 can also increase the reliability of the fixation of the two with the upper shell 2.

[0053] In the embodiment of the present application, the first part 81 is at least partially located inside the first glue injection groove 21, that is, the first part 81 can be entirely located inside the first glue injection groove 21, and of course, it can also be partially located outside the opening side of the first glue injection groove 21, that is, part of the glue in the first part 81 can be located on the end face of the groove side wall of the first glue injection groove 21. Please refer to FIG. 1 for the structure of the first part 81. Figure 6 It is understood that part of the glue in the first part 81 is located on the end face of the second groove side wall 212 facing the top cover 1. The first part 81 is used to seal the circumferential joint between the top cover 1 and the upper shell 2.

[0054] In the embodiment of the present application, the second part 82 is located on the side away from the opening of the first glue injection groove 21, and the second part 82 is used to seal the circumferential joint (the first joint 101) between the upper shell 2 and the middle shell 3. The circumferential joint described herein can be 360°, or less than 360°. Please refer to FIG. 1 for the structure of the second part 82. Figure 8 It is understood that the first part 81 is in a ring structure, and the upper end of the ring structure is in sealing contact with the top cover 1. The second part 82 is in a U-shaped structure, and the bottom end of the U-shaped structure away from the first part 81 is in sealing contact with the middle shell 3.

[0055] In the embodiment of the present application, the first part 81 sealing the circumferential joint between the upper shell 2 and the top cover 1, and the second part 82 sealing the circumferential joint (the first joint 101) between the upper shell 2 and the middle shell 3, are integrally formed on the upper shell 2 by the glue injection process (encapsulation process), which improves the combination reliability of the first sealing part 8 and the upper shell 2, and the first sealing part 8 is not easy to displace, which can improve the sealing performance of the circumferential joint (the first joint 101) between the upper shell 2 and the top cover 1, and the circumferential joint (the first joint 101) between the upper shell 2 and the middle shell 3, thereby improving the overall performance of the drive assembly 100A. Moreover, the first sealing part 8 is directly formed on the upper shell 2, which is fast in forming, and the first sealing part 8 can simultaneously seal the circumferential joint between the upper shell 2 and the top cover 1 and the first joint 101, which reduces the number of sealing parts, and is conducive to improving the production efficiency of the drive assembly 100A and reducing the production cost.

[0056] In the embodiment of the present application, the second part 82 can include a first body part 821 connected with a first sealing part 822, the first body part 821 is connected with the connecting part 83, and the first sealing part 822 is connected to one end of the first body part 821 away from the connecting part 83, which is at the bottom end of the U-shaped structure away from the first part 81. The first sealing part 822 can also be in a U-shaped structure. The first sealing part 822 abuts against and seals the middle shell 3, and the first body part 821 is attached to the inner side wall of the upper shell 2. That is, when the second part 82 is formed, a mold tooling can be used, and a glue injection gap is formed between the mold tooling and the inner side wall of the upper shell 2. The inner space of the first glue injection groove 21 is connected to the glue injection gap through the communication hole 21A, and the liquid glue flowing out of the communication hole 21A will form the second part 82 in the glue injection gap between the tooling and the upper shell 2. In this way, the first body part 821 of the second part 82 is combined with the inner side wall of the upper shell 2, which not only facilitates the molding of the second part 82, but also increases the strength of the second part 82. In this way, a greater force can be applied to the first sealing part 822 to improve the sealing of the circumferential joint (first joint 101) between the upper shell 2 and the middle shell 3.

[0057] Please refer to Figure 7 and Figure 8 understandably, the end surface of the first part 81 abutting against the inner surface of the groove wall (the groove wall includes the first groove side wall 211, the second groove side wall 212, and the groove bottom wall 213) of the first glue injection groove 21 can also be provided with a reinforcing body 86. The inner surface of the groove wall of the first glue injection groove 21 can also be provided with a plurality of concave parts, which can be apertures that do not penetrate the groove wall. During glue injection, the liquid glue can flow into the interior of the apertures to form the reinforcing body 86, that is, the liquid glue flows into the space surrounded by the concave parts to form the reinforcing body of the first part 81. In this way, the connection firmness of the first part 81 and the first glue injection groove 21 can be further improved.

[0058] The structure of the first glue injection groove 21 can have various forms, and one specific embodiment of the first glue injection groove 21 is given below.

[0059] In the embodiment of the present application, the first glue injection groove 21 at least includes a first groove side wall 211 and a second groove side wall 212, and the first glue injection groove 21 extends along the circumference of the upper shell 2. The first groove side wall 211 and the second groove side wall 212 can be substantially parallel, for example, the cross section of the first glue injection groove 21 can be rectangular. Of course, the first groove side wall 211 and the second groove side wall 212 can also be non-parallel, for example, the cross section of the first glue injection groove 21 can be V-shaped. Compared with the first groove side wall 211, the second groove side wall 212 is closer to the longitudinal center plane of the shell 100, and the longitudinal center plane refers to a vertical plane passing through the center axis of the motor. The first groove side wall 211 and the second groove side wall 212 can be the same height, of course, they can also be different heights, and theFigure 2 and Figure 5 The height of the first slot side wall 211 is greater than that of the second slot side wall 212, so that a part of the first portion 81 can be fixed on the first glue injection slot 21, and another part can be fixed on the second slot side wall 212. The edge of the top cover 1 can abut on the top surface of the first slot side wall 21, and the part in the edge of the top cover 1 can be crimped on the top surface of the second slot side wall 212 through the first portion 81. A wider abutting length (from the first slot side wall 211 to the second slot side wall 212) of the top cover 1 can be formed, so that the top cover 1 is better supported and sealed. The upper end of the first slot side wall 211 is connected with the inner side wall of the upper shell 2. The side wall of the upper shell 2 and the slot wall surrounding the first glue injection slot 21 can be integrally formed.

[0060] In the embodiment, the top cover 1 is partially supported on the end surface of the first slot side wall 211, and an opening is formed between the first slot side wall 211 and the second slot side wall 212. The part of the first slot side wall 211 away from the opening is arranged separately from the inner wall of the upper shell 2, and the communication holes 21A are arranged on the first slot side wall 211. The number of the communication holes 21A is usually several, which are arranged at a predetermined distance along the circumference. The first main body part 821 is partially located between the first slot side wall 211 and the inner side wall of the upper shell 2.

[0061] In the embodiment, the part of the first slot side wall 211 and the inner side wall 23 of the upper shell can form a glue flow channel. The liquid glue flowing out of the communication holes 21A of the first glue injection slot 21 first flows to the glue flow channel, which is conducive to the liquid glue flowing downward along the inner side wall 23 of the upper shell and facilitating the forming of the second portion 82. Moreover, the structure in the second portion 82, which is solidified in the glue flow channel, is combined with the inner side wall 23 of the upper shell and the first slot side wall 211, thereby improving the fixing reliability of the second portion 82. Of course, the glue injection process can also start from other entrances, which is not limited in the embodiment.

[0062] In the embodiment, the end surface of the second slot side wall 212 is lower than that of the first slot side wall 211, and part of the glue of the first portion 81 is located on the end surface of the second slot side wall 212. The upper end surface of the glue located on the end surface of the second slot side wall 212 is substantially flush with the end surface of the first slot side wall 211. The top cover 1 can be supported on the end surface of the first slot side wall 211, the glue in the first glue injection slot 21 and the glue on the end surface of the second slot side wall 212. Generally, the hardness of the first slot side wall 211 is higher than that of the glue, which can meet the support requirements of the top cover 1 and the sealing requirements. The first portion 81 formed in the embodiment is a stepped structure, part of which is pressed in the first glue injection slot 21, and part of which is pressed on the end surface of the second slot side wall 212. The stepped structure can increase the pressure bearing capacity of the first portion 81, so as to prevent the first portion 81 from collapsing and causing sealing failure after being deformed by pressure.

[0063] In order to improve the use strength of the upper shell 2, the driving assembly 100A in the embodiment further comprises a plurality of first reinforcing ribs 22, all the first reinforcing ribs 22 are arranged at intervals along the circumference of the upper shell 2, the first reinforcing ribs 22 are connected to the outer wall of the groove bottom wall 213 away from the opening, and part of the first reinforcing ribs 22 pass through the first main body part 821 and are connected to the inner side wall 23 of the upper shell.

[0064] That is, the first reinforcing ribs 22 are connected to the inner side wall of the upper shell 2 and the groove bottom wall 213 of the first glue injection groove 21 at the same time, so that the first glue injection groove 21 can be further supported on the inner side wall 23 of the upper shell 2 through the first reinforcing ribs 22, play a role in fixing the first glue injection groove 21, avoid the sagging of the groove side wall surrounding the first glue injection groove 21, and be beneficial to the reliable abutting of the first part 81 and the top cover 1 at all times, and improve the reliability of the first part 81 in sealing the circumferential joint between the upper shell 2 and the top cover 1. Furthermore, the first reinforcing ribs 22 are also combined with the first main body part 821, so that the combination reliability of the first main body part 821 and the upper shell 2 can also be improved to a certain extent.

[0065] In the embodiment, the first main body part 821 comprises a plurality of sections 8211, at least one section 8211 is connected to the first part 81 through a connecting part 83, Figure 8 The embodiment in which part of the sections are connected with the connecting part 83 is shown, and one or more sections 8211 without the connecting part 83 are arranged between two adjacent sections 8211 with the connecting part 83. In the embodiment, the end of each section 8211 away from the connecting part 83 is connected to the first sealing part 822, that is, each connecting part 83 is connected to the first sealing part 822. There is an opening 823 between two adjacent sections 8211, the opening 823 penetrates the end face of the first main body part 821 away from the first sealing part 822, the first reinforcing rib 22 passes through the opening 823 and is connected to the inner side wall of the upper shell 2, and the first reinforcing rib 22 can be partially located outside the opening 823, or the upper end face of the first reinforcing rib 22 is substantially flush with the opening position of the opening 823.

[0066] In this embodiment, the upper end of the first reinforcing rib 22 can extend into the space between the first groove side wall 211 and the inner side wall 23 of the upper shell, and the liquid glue flow channel formed between the part of the first groove side wall 211 and the inner side wall of the shell 100 can be divided into several intervals to guide the liquid glue flow, which is beneficial to the filling of the liquid glue in the liquid glue flow channel, and the connection area of the first reinforcing rib 22 and the upper shell 2 is relatively large, which is beneficial to improving the overall strength of the upper shell 2.

[0067] In the embodiment of the present application, the first part 81 has a first abutting surface 811 facing the top cover 1, and the first abutting surface 811 is provided with the first protrusion 84, and the top cover 1 abuts against the first protrusion 84 and the first abutting surface 811 at the same time; the second part 82 has a second abutting surface 8221 facing the middle shell 3, and the second abutting surface 8221 is provided with the second protrusion 8222, and the middle shell 3 abuts against the second abutting surface 8221 and the second protrusion 8222 at the same time.

[0068] The first protrusion 84 and the second protrusion 8222 are small in volume and are easy to deform. When the top cover 1 is pressed against the upper shell 2, the first protrusion 84 is pressed down by the pressure, and further plays a role of insulation sealing. Similarly, after the upper shell 2 and the middle shell 3 are installed, the second protrusion 8222 is extruded and deformed, and further plays a role of insulation sealing.

[0069] Please understand that Figure 4 and Figure 12 In the embodiment of the present application, the inside of the middle shell 3 has a motor bracket 30, the motor bracket 30 includes an arc-shaped wall 31, a first connecting wall 32 and a second connecting wall 33, the arc-shaped wall 31 has a first side edge and a second side edge, both the first side edge and the second side edge extend along the axial direction of the arc-shaped wall 31, the first side edge is connected with the inner side wall 301 of the middle shell through the first connecting wall 32, and the second side edge is connected with the inner side wall 23 of the corresponding side of the middle shell 3 through the second connecting wall 33. The arc-shaped wall 31 is in shape fit with the outer wall of the motor, and plays a role of limiting the motor, which can effectively alleviate the vibration of the motor 7.

[0070] In order to improve the overall use strength of the middle shell 3, the surfaces of the first connecting wall 32 and the second connecting wall 33 facing the upper shell 2 are provided with a plurality of third reinforcing rib plates 34, and the third reinforcing rib plates 34 are also connected with the inner side wall of the middle shell 3. In this way, the first connecting wall 32 and the second connecting wall 33 can be connected with the inner side wall of the upper shell 2 through the third reinforcing rib plates 34, so as to improve the stability of the first connecting wall 32 and the second connecting wall 33. In addition, at least one third reinforcing rib plate 34 is a hollow structure 341, so that the weight of the middle shell 3 can be reduced, and the overall weight of the driving assembly 100A can be reduced. In addition, the hollow structure 341 can also avoid the space below the middle shell 3 for the circuit board and the motor 7 with wiring, so as to facilitate the storage of the cable.

[0071] In the embodiment of the present application, the third reinforcing rib plate 34 and the first reinforcing rib plate 22 can also be inserted and matched, and play a role of installing and positioning the upper shell 2 and the middle shell 3. Figure 12As shown, the first reinforcing rib plate 22 has a protrusion, and the third reinforcing rib plate 34 has a recess, the protrusion can be inserted into the recess, and the position of the upper shell 2 and the middle shell 3 is positioned. Of course, the first reinforcing rib plate 22 is provided with a recess 221, and the third reinforcing rib plate is provided with a protrusion 342. When the shell parts are tightened by screws, the first reinforcing rib plate 22 and the third reinforcing rib plate 34 can abut each other, and the function of limiting is achieved.

[0072] Further, the surfaces of the first connecting wall 32 and the second connecting wall 33 towards the bottom shell 4 can also be provided with a plurality of fourth reinforcing rib plates 35, each third reinforcing rib plate 34 is arranged along the circumference of the middle shell 3, and each fourth reinforcing rib plate 35 is also arranged along the circumference of the middle shell 3, and the fourth reinforcing rib plate 35 is also connected with the inner wall of the middle shell 3, so that the first connecting wall 32 and the second connecting wall 33 can be connected with the inner side wall of the upper shell 2 through the fourth reinforcing rib plate 35, further improving the stability of the first connecting wall 32 and the second connecting wall 33.

[0073] Please refer to Figures 9 to 11 In the embodiment of the application, the bottom shell 4 is provided with at least one first bolt seat 42 for fixing the motor 7, Figure 9 Six first bolt seats 42 are shown in the middle, and the first bolt seat 42 is provided with a bolt through hole 421. The bottom shell 4 has a second glue injection groove 41. The drive assembly 100A further comprises a second sealing part 9, and the second sealing part 9 is at least partially located in the second glue injection groove 41. The second sealing part 9 comprises a third part 91 and at least one first annular gasket 92, the first annular gasket 92 corresponds to the first bolt seat 42 one by one, Figure 11 Six first annular gaskets 92 are shown in the middle, and one first annular gasket 92 corresponds to one first bolt seat 42. The third part 91 is connected with each first annular gasket 92, and the first annular gasket 92 is arranged on the first bolt seat 42. As Figure 12 As shown, the first annular gasket 92 can be located between the first bolt seat 42 and the nut column. The nut column is fixedly connected to the middle shell 3. The bolt passes through the through hole on the first bolt seat 42 from the outside of the bottom shell 4, and can be threadedly connected with the internal thread part on the nut column, so as to realize the fixation of the bottom shell 4 and the middle shell 3.

[0074] Please combine Figure 12 and Figure 13 It is understood that in the embodiment of the application, the third part 91 is used to seal the circumferential joint (second joint 102) between the bottom shell 4 and the middle shell 3. The third part 91 can be a U-shaped structure, and the end of the U-shaped structure away from the first annular gasket 92 is in sealing contact with the middle shell 3.

[0075] In the embodiment of the present application, the third part 91 of the circumferential joint (second joint 102) between the sealed middle shell 3 and the bottom shell 4, and the first annular gasket 92 on the first bolt seat 42 on the buffer bottom shell 4 are integrally formed on the bottom shell 4 by the glue injection process (encapsulation process), the second sealing part 9 is not easy to displace, the sealing performance of the circumferential joint (second joint 102) between the bottom shell 4 and the middle shell 3 can be improved, and the overall performance of the drive assembly 100A can be improved. Moreover, the second sealing part 9 is directly formed on the bottom shell 4, which is fast in forming, seals the second joint 102 and the plurality of first bolt seats 42 at the same time, reduces the number of sealing parts and buffer pads, and is beneficial to improving the production efficiency of the drive assembly 100A and reducing the production cost.

[0076] In the embodiment of the present application, the third part 91 includes a section that is in close contact with the inner wall of the bottom shell 4, so that the bonding area of the third part 91 and the bottom shell 4 is relatively large, and the bonding force is relatively high. The molding of the third part 91 can be assisted by a mold tool, and the tool and the inner side wall 401 of the bottom shell can further form a glue injection channel to solidify the liquid glue on the inner side wall 401 of the bottom shell.

[0077] The abutting surface of the third part 91 towards the middle shell 3 can be further provided with a third protrusion 93, which is deformed by extrusion after the bottom shell 4 and the middle shell 3 are installed, further improving the sealing performance of the second joint 102.

[0078] Please refer to Figure 12 In the embodiment of the present application, the drive assembly 100A further includes a plurality of second reinforcing rib plates 43, which are arranged at intervals along the circumference of the bottom shell 4, and the second reinforcing rib plates 43 partially pass through the third part 91 to connect the inner wall of the bottom shell 4. On the one hand, the second reinforcing rib plates 43 can improve the use strength of the bottom shell 4, and on the other hand, the second reinforcing rib plates 43 can be combined with the third part 91 to further improve the molding stability of the third part 91.

[0079] Please refer to Figure 8 、 Figure 12 、 Figure 13In this embodiment, the upper housing 2 further has an inwardly extending first end wall 24, and the middle housing 3 further has an inwardly extending second end wall 37. The first sealing member 8 is also connected to a first end sealing section 85 extending axially along the motor. The first end sealing section 85 extends to the end face of the first end wall 24 away from the inner cavity and is sealed and pressed between the first end wall 24 and the second end wall 37. In this way, the first end sealing section 85 can seal the joint (third joint 103) formed between the first end wall 24 and the second end wall 37, further improving the sealing performance of the drive assembly 100A. The first end wall 24 and the second end wall 37 have thickness along the axial direction, so there is an axial joint between the first end wall 24 and the second end wall 37. At the same time, the first end wall 24 and the second end wall 37 are both end faces extending inward from the inner wall of the housing. There is also a radial joint (third joint 103) between the first end wall 24 and the second end wall 37. The first end sealing section 85 can simultaneously radially seal the axial joint and the radial joint between the first end wall 24 and the second end wall 37, thereby achieving the effect of further improving the sealing performance of the drive assembly 100A.

[0080] Specifically, please see Figure 7 There is a through hole 241 between the first end wall 24 and the inner side wall 23 of the upper housing 2. The first end sealing section 85 is located inside the through hole 241, so the first end sealing section 85 has relatively high fixation stability.

[0081] Please refer to this again. Figure 12 and Figure 13 In this embodiment, the middle housing 3 further has an inwardly extending second end wall 37, the bottom housing 4 has an inwardly extending third end wall 44, and the second sealing member 9 is further connected to a second end sealing section 94 extending axially along the motor. The second end sealing section 94 extends to the end face of the third end wall 44 away from the inner cavity and is sealed and pressed between the second end wall 37 and the third end wall 44. Thus, the second end sealing section 94 can seal the joint formed between the third end wall 44 and the second end wall 37. Figure 13 The fourth joint 104 is sealed to further improve the sealing performance of the drive assembly 100A. Similar to the first end wall 24 and the second end wall 37, the second end wall 37 and the third end wall 44 have thickness along the axial direction, so there is also an axial joint between the second end wall 37 and the third end wall 44. At the same time, the second end wall 37 and the third end wall 44 are also end faces extending inward from the inner wall of the housing, and there is also a radial joint (fourth joint 104) between the second end wall 37 and the third end wall 44. The second end sealing section 94 can simultaneously radially seal both the axial joint and the radial joint between the second end wall 37 and the third end wall 44, thereby achieving the effect of further improving the sealing performance of the drive assembly 100A.

[0082] Please refer to Figure 14In the embodiment of the application, the driving assembly 100A further comprises a front cover 5 and a third sealing component 10. The front cover 5 has a central through hole 52 and at least one second bolt seat 53. The third sealing component 10 comprises a second sealing part 1-1, a second annular gasket 1-2 and an intermediate sealing part 1-3. The second annular gasket 1-2 corresponds to the second bolt seat one by one. The outer periphery of each second annular gasket 1-2 has a first section 1-4 and a second section 1-5 extending outward. The second annular gasket 1-2 is connected to the second sealing part 1-1 through the first section 1-4. The second annular gasket 1-2 is connected to the intermediate sealing part 1-3 through the second section 1-5.

[0083] The second sealing part 1-1 is arranged between the two opposite end faces of the front cover 5 and the shell 100, and is used to seal the circumferential joint between the front cover 5 and the shell 100. The second sealing part 1-1 abuts against the first end sealing section 85 and the second end sealing section 94. The second annular gasket 1-2 is used to seal the bolt hole on the second bolt seat 53 in the circumferential direction. Please refer to Figures 13 to 15 It should be understood that the intermediate sealing part 1-3 is at least partially arranged between the front cover 5 and the motor shell 71, so as to at least seal the central through hole 52 in the circumferential direction. The intermediate sealing part 1-3 can also seal the connecting hole on the front cover 5 opposite to the electrical connector 10A in the circumferential direction.

[0084] The third glue injection groove 51 can be arranged on the front cover 5. The third sealing component 10 is integrally formed on the front cover 5 by injecting glue into the third glue injection groove 51. The third sealing component 10 is not easy to displace, and the sealing performance of the front cover 5 and the end face of the shell 100 can be improved, thereby improving the overall performance of the driving assembly 100A. The third sealing component 10 is directly formed on the front cover 5, which is fast and can seal multiple positions at the same time. For example, the joints between the front cover 5 and the first end wall 24, the second end wall 37 and the third end wall 44, the joint between the central through hole 52 and the coupling sleeve 6, and the joint between the electrical connector 10A and the through hole thereof. The number of sealing components is reduced, which is conducive to improving the production efficiency of the driving assembly 100A and reducing the production cost.

[0085] The conduit device 1000 in the embodiment of the application has the driving assembly 100A of any of the above-mentioned embodiments, and therefore has the technical effects of the driving assembly 100A.

[0086] The other structures of the driving assembly 100A and the conduit device 1000 can refer to the prior art, and will not be described herein.

[0087] In the description of the present application, it should be noted that in the embodiments of the present application, the terms "first", "second" and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more features.

[0088] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" means that the relative position relationship after connection is unchanged.

[0089] The orientation terms mentioned in the embodiments of the present application, such as "inner", "outer" and the like, are only the direction of the reference drawings, therefore, the orientation terms used are for better, clearer description and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application. In addition, unless otherwise stated in the present application, "a plurality of" in the present application means two or more.

[0090] In the description of the embodiments of the present application, the terms "including", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0091] In the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0092] The above is only the preferred embodiment of the present application, it should be noted that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A drive assembly, characterized by The drive assembly comprises a housing having an inner cavity for accommodating a motor, the housing comprising a top cover, an upper housing, a middle housing and a bottom housing, the drive assembly further comprising a first sealing component, the first sealing component comprising a first part, a second part and a connecting part, the upper housing having a first surface supporting the top cover, the first surface being provided with a first glue injection groove having an opening facing the top cover, the first part being located at least partially in the first glue injection groove for sealing a circumferential joint between the top cover and the upper housing, the second part being located at one side of the first glue injection groove away from the opening, the second part being used for sealing a circumferential joint between the upper housing and the middle housing; the slot wall of the first glue injection groove is further provided with a communication hole, the connecting part is located inside the communication hole, and the first part is connected to the second part through the connecting part.

2. The drive assembly of claim 1, wherein, The second part comprises a first main body part and a first sealing part connected to each other, the first main body part is connected to the connecting part, the first sealing part is connected to one end of the first main body part away from the connecting part, the first sealing part abuts and seals against the middle housing, and the first main body part is fitted to the inner side wall of the upper housing.

3. The drive assembly of claim 2, wherein, The first glue injection groove comprises a first slot side wall and a second slot side wall, the upper end of the first slot side wall is connected to the inner side wall of the upper housing, the top cover is partially supported on the end face of the first slot side wall, the part of the first slot side wall away from the opening is separately provided from the inner wall of the upper housing, the communication hole is provided on the first slot side wall, and the first main body part is partially located between the first slot side wall and the inner side wall of the upper housing.

4. The drive assembly of claim 3, wherein, A plurality of first reinforcing rib plates are further included, all the first reinforcing rib plates are arranged along the circumference of the upper housing, the first glue injection groove further comprises a slot bottom wall, and the first reinforcing rib plate is partially connected to the outer wall of the slot bottom wall away from the opening and partially connected to the inner side wall of the upper housing through the first main body part.

5. The drive assembly of claim 4, wherein, The first main body part comprises a plurality of sections, at least one of the sections connects the first part through the connecting part, the end of each section away from the connecting part is connected to the first sealing part, and there is a gap between two adjacent sections, the gap penetrates the end face of the first main body part away from the first sealing part, and the first reinforcing rib plate penetrates the gap to connect the inner side wall of the upper housing.

6. The drive assembly of any one of claims 1 to 5, wherein, The first part has a first abutting face facing the top cover, the first abutting face is provided with a first protrusion, and the top cover abuts against the first protrusion and the first abutting face at the same time; the second part has a second abutting face facing the middle housing, the second abutting face is provided with a second protrusion, and the middle housing abuts against the second abutting face and the second protrusion at the same time.

7. The drive assembly of any one of claims 1 to 5, wherein, The upper housing further has a first end wall extending inwardly, the middle housing further has a second end wall extending inwardly, and the first sealing component is further connected with a first end part sealing section extending along the axial direction of the motor, the first end part sealing section extends to the end face of the first end wall away from the inner cavity and is sealingly pressed between the first end wall and the second end wall.

8. The drive assembly of claim 7, wherein, The bottom shell is provided with at least one first bolt seat for fixing the motor, and the drive assembly further comprises a second sealing component, the bottom shell has a second glue injection groove, and the second sealing component is at least partially located in the second glue injection groove; the second sealing component comprises a third part and at least one first annular gasket, the third part is connected with each first annular gasket, the first annular gasket corresponds to the first bolt seat, and the first annular gasket is arranged on the first bolt seat; the third part is used for sealing a circumferential joint between the bottom shell and the middle shell body.

9. The drive assembly of claim 8, wherein, The third part comprises a section that is attached to an inner wall of the bottom shell.

10. The drive assembly of claim 8, wherein, Further comprising a plurality of second reinforcing ribs, the second reinforcing ribs are arranged along the circumference of the bottom shell, and the second reinforcing ribs partially pass through the third part to connect the inner wall of the bottom shell.

11. The drive assembly of claim 8, wherein, The middle shell body further has a second end wall extending inwardly, the bottom shell has a third end wall extending inwardly, the second sealing component is further connected with a second end sealing section extending along the axial direction of the motor, the second end sealing section extends to an end face of the third end wall away from the inner cavity, and is sealingly arranged between the second end wall and the third end wall.

12. The drive assembly of claim 11, wherein, Further comprising a front cover and a third sealing component, the front cover has a central through hole and at least one second bolt seat, the third sealing component comprises a second sealing part, a second annular gasket and an intermediate sealing part, the second annular gasket corresponds to the second bolt seat one by one, and an outer periphery of each second annular gasket has a first section and a second section extending outwardly, the second annular gasket is connected with the second sealing part through the first section, and the second annular gasket is connected with the intermediate sealing part through the second section; The second sealing part is arranged between two end faces of the front cover and the shell body in a clamping manner, the second sealing part is used for sealing a circumferential joint between the front cover and the shell body, and the second sealing part abuts against the first end sealing section and the second end sealing section; The second annular gasket is used for sealing a bolt hole on the second bolt seat in a circumferential direction; The intermediate sealing part is at least partially arranged between the front cover and the motor shell in a clamping manner, so as to at least seal the central through hole in a circumferential direction.

13. The drive assembly of any one of claims 1 to 5, wherein, The inner part of the middle shell body has a motor bracket, the motor bracket comprises an arc-shaped wall, a first connecting wall and a second connecting wall, the arc-shaped wall has a first side edge and a second side edge, the first side edge and the second side edge both extend along the axial direction of the arc-shaped wall, the first side edge is connected with an inner side wall of the middle shell body through the first connecting wall, and the second side edge is connected with a corresponding inner side wall of the middle shell body through the second connecting wall. The surfaces of the first connecting wall and the second connecting wall facing the upper shell are provided with third reinforcing ribs, the surfaces of the first connecting wall and the second connecting wall facing the bottom shell are provided with fourth reinforcing ribs, the third reinforcing ribs are arranged along the circumference of the middle shell, the fourth reinforcing ribs are also arranged along the circumference of the middle shell, the third reinforcing ribs and the fourth reinforcing ribs are connected with the inner wall of the middle shell, and at least one of the third reinforcing ribs is a hollow structure.

14. The drive assembly of any one of claims 1 to 5, wherein, The inner surface of the groove wall of the first glue injection groove is further provided with a plurality of concave parts, and the first part further comprises a reinforcing body located in the space surrounded by the concave parts.

15. A catheter device, characterized by The drive assembly comprises a working assembly and the drive assembly of any one of claims 1 to 14, and the drive assembly is used to drive the rotation of the drive shaft of the working assembly.

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