CN215897427U

CN215897427U - Vacuum pump drive assembly

Info

Publication number: CN215897427U
Application number: CN202121921025.7U
Authority: CN
Inventors: 郭定云
Original assignee: Zhejiang Weipeng Refrigeration Equipment Co ltd
Current assignee: Zhejiang Weipeng Refrigeration Equipment Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-22
Anticipated expiration: 2031-08-16

Abstract

The utility model provides a vacuum pump driving assembly, and belongs to the technical field of machinery. It has solved the current not good problem of vacuum pump efficiency. This vacuum pump drive assembly includes the support, motor and the pump rotor of setting on the support, the type of motor is external rotor electric machine, external rotor electric machine is including the skeleton that is used for installing the stator and the external rotor that overlaps outside the skeleton and be the tube-shape, the skeleton links firmly with the support, have on the skeleton along the central bore that the pump rotor axial runs through the setting, be equipped with the pivot in the central bore, pivot and external rotor coaxial arrangement, and the pivot is sharp with the pump rotor and distributes, the pivot rotates with the skeleton to be connected, pivot one end links firmly with the external rotor through the connecting piece, the pivot other end is connected with the pump rotor. This vacuum pump drive assembly can improve vacuum pump work efficiency.

Description

Vacuum pump drive assembly

Technical Field

The utility model belongs to the technical field of machinery, relates to a vacuum pump, and particularly relates to a vacuum pump driving assembly.

Background

The vacuum pump refers to a device or equipment for obtaining vacuum by pumping a pumped container by using a mechanical, physical, chemical or physicochemical method.

An existing vacuum pump is an electronic vacuum pump rotor positioning structure (application number: 201921985746.7) disclosed in a Chinese patent library, and comprises a motor, a flange, a cavity, an upper cover plate and a lower cover plate, wherein the motor is installed on the bottom surface of the flange, the lower cover plate, the cavity and the upper cover plate are sequentially arranged on the top surface of the flange from bottom to top, the cavity is internally provided with a rotor, an output shaft of the motor extends towards the inside of the cavity, the end part of the output shaft is formed with symmetrically arranged flat-part surfaces, and a flat-part through hole sleeved on the flat-part surfaces is formed in the center of the rotor.

The vacuum pump has the problem of small starting torque, and the working efficiency of the vacuum pump is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a vacuum pump driving assembly which solves the technical problem of how to improve the working efficiency.

The purpose of the utility model can be realized by the following technical scheme: vacuum pump drive assembly, which comprises a bracket, motor and the pump rotor of setting on the support, its characterized in that, the type of motor is external rotor electric machine, external rotor electric machine is including the skeleton that is used for installing the stator and the external rotor that overlaps outside the skeleton and be the tube-shape, the skeleton links firmly with the support, has the centre bore that runs through the setting along pump rotor axial on the skeleton, be equipped with the pivot in the centre bore, pivot and external rotor coaxial arrangement, and the pivot is sharp with the pump rotor and distributes, the pivot rotates with the skeleton to be connected, pivot one end links firmly with the external rotor through the connecting piece, the pivot other end is connected with the pump rotor.

The outer rotor motor has larger torque and torque density, so that the vacuum pump obtains larger starting torque, the working efficiency of the vacuum pump is improved, and the service life of the vacuum pump can be prolonged.

In the vacuum pump driving assembly, the connecting piece is a connecting cover, the connecting cover is composed of a first ring body, a second ring body and a circle of connecting rods arranged between the first ring body and the second ring body, the second ring body is located on the inner side of the first ring body, the first ring body and the second ring body are coaxially arranged, the circle of connecting rods are distributed at intervals along the circumferential direction of the first ring body, two ends of each connecting rod are respectively connected with the first ring body and the second ring body, and the first ring body and the second ring body are respectively fixedly connected with the outer rotor and the rotating shaft. By adopting the design, the connecting device has the advantages of simple structure and stable connection.

In the vacuum pump driving assembly, the rotating shaft is fixed with the radiating blades, and the connecting cover is positioned between the radiating blades and the outer rotor. When the heat dissipation device is used, the heat dissipation blades rotate along with the rotating shaft to supply air into the outer rotor through a gap formed by two adjacent connecting rods, so that heat dissipation of the stator is accelerated, the working stability and the service life of the outer rotor motor are improved, and the purpose of improving the working efficiency of the vacuum pump is stably realized.

As another scheme, in the vacuum pump driving assembly, the connecting member is a heat dissipation fan, the heat dissipation fan includes an inner ring and an outer ring which are coaxially disposed, a circle of blades which are uniformly distributed along the circumferential direction of the inner ring is distributed between the inner ring and the outer ring, the inner ring and the outer ring are connected through the blades, and the inner ring and the outer ring are fixedly connected with the rotating shaft and the outer rotor respectively. When the heat dissipation motor is used, the heat dissipation fan rotates along with the rotor to dissipate heat of the stator, so that the working stability and the service life of the outer rotor motor are improved.

Radiator fan had both been used for connecting external rotor and pivot, realized external rotor and pivot linkage, followed the external rotor again and rotated in order dispelling the heat for the stator, promptly in this application, radiator fan possesses the dual-purpose effect of a thing, when simplifying the structure, the equipment of being convenient for.

In the vacuum pump driving assembly, the ring body extends towards the outer rotor to form the guide ring integrally, the guide ring is matched with the outer rotor, and the guide ring is inserted in the outer rotor for installation and guide of the outer rotor and the ring body I, so that the assembly is facilitated.

In foretell vacuum pump drive assembly, the shaping has the cavity coaxial with the pump rotor on the support, and the cavity accent sets up towards the motor, pump rotor one end is in the cavity, the shaping has the holding ring on the cavity diapire, the holding ring cover is outside the pump rotor, pivot one end stretches into the holding ring and is connected with the pump rotor, be equipped with bearing one in the holding ring, the outer lane and the holding ring of bearing one link firmly, pump rotor and pivot all link firmly with the inner circle of bearing one, make the junction of pump rotor and pivot directly obtain bearing one and support, transmission stability and precision are improved.

In foretell vacuum pump drive assembly, the skeleton comprises the body of vertical setting and the shaping on the body outer wall and be annular connecting seat, and the body is used for installing the stator, and the body hole is above-mentioned centre bore, and the connecting seat is in between external rotor and the support, and connecting seat and support link firmly, and the connecting seat blocks the cavity accent to in preventing impurity such as dust from entering into the cavity, improve the transmission stability of pump rotor and pivot.

The connecting seat both had been used for connecting motor and skeleton, was used for sheltering from the cavity accent again, and in this application, the connecting seat possesses a dual-purpose effect of thing promptly, when simplifying the structure, further convenient equipment.

In foretell vacuum pump drive assembly, there is the clearance between external rotor and the connecting seat, and clearance intercommunication external rotor inner chamber to obtain more smooth and easy heat dissipation air flue, increase stator radiating rate and effect, further improve the life-span and the job stabilization nature of motor, thereby further improve vacuum pump efficiency.

In the vacuum pump driving assembly, the connecting seat is pressed on the support and is fixedly connected with the support through the first screw, and the first screw is at least two and is distributed along the circumferential direction of the connecting seat.

In the vacuum pump driving assembly, the support is provided with the threaded hole axially arranged along the connecting seat, the connecting seat is correspondingly provided with the through holes, the threaded holes and the screws are the same in quantity and are in one-to-one correspondence in position, one rod part of each screw penetrates through the through hole and is screwed in the threaded hole, and one head part of each screw is pressed on the connecting seat.

In foretell vacuum pump drive assembly, constitute the ring channel that axial cross-section is L shape between connecting seat and the body, foretell through-hole shaping is on the ring channel diapire, and the shaping has the sand grip of round along body circumference equipartition on the ring channel diapire, and sand grip length is along the radial extension of body, and sand grip one end extends to the body outer wall to strengthen ring channel diapire intensity, improve skeleton and leg joint stability.

In foretell vacuum pump drive assembly, the ring channel diapire upwards extends to form and is annular connecting portion, and connecting portion and screw hole quantity are the same and the position one-to-one, and the connecting portion hole is above-mentioned through-hole, and the other end of the sand grip that sets up relative with connecting portion extends to the connecting portion outer wall, and the other end of surplus sand grip extends to the ring channel lateral wall to further strengthen the connection stability of connecting seat and support.

In foretell vacuum pump drive assembly, integrated into one piece has the go-between on the connecting seat outer wall, and the accent border integrated into one piece of cavity has the fender ring that matches with the go-between, and the go-between cover is outside keeping off the ring, and the connecting seat presses on keeping off the ring to the installation to the connecting seat is led the guide, further makes things convenient for connecting seat and leg joint.

In the vacuum pump driving assembly, the connecting ring is pressed on the support and is fixedly connected with the support through the second screws, and the second screws are at least two and are uniformly distributed along the circumferential direction of the connecting ring so as to further enhance the connection stability of the framework and the support.

In foretell vacuum pump drive assembly, the pivot both ends all are connected with the body rotation through bearing two.

In foretell vacuum pump drive assembly, all be equipped with annular step on the inner wall of body both ends, two bearings are in two annular steps respectively, and two outer races of bearing press on annular step diapire, and the further spacing pivot of going up improves vacuum pump job stabilization nature.

Compared with the prior art, the vacuum pump driving assembly has the following advantages:

1. the outer rotor motor has larger torque and torque density, so that the vacuum pump obtains larger starting torque, the working efficiency of the vacuum pump is improved, and the service life of the vacuum pump can be prolonged.

2. The connecting seat both had been used for connecting motor and skeleton, was used for sheltering from the cavity accent again, and in this application, the connecting seat possesses a dual-purpose effect of thing promptly, when simplifying the structure, further convenient equipment.

3. The pump rotor and the rotating shaft are fixedly connected with the inner ring of the bearing I, so that the connecting part of the pump rotor and the rotating shaft is directly supported by the bearing, and the transmission stability and precision are improved.

Drawings

Fig. 1 is a schematic perspective view of a vacuum pump driving assembly.

Fig. 2 is a schematic sectional structure view of a vacuum pump driving assembly.

Fig. 3 is a schematic view of the structure of the connection cover.

Fig. 4 is a schematic structural view of the skeleton.

Fig. 5 is a schematic structural view of the stent.

In the figure, 1, a bracket; 1a, a concave cavity; 1b, a positioning ring; 1c, a baffle ring; 2. a pump rotor; 3. a framework; 3a, a pipe body; 3a1, center hole; 3b, a connecting seat; 3c, convex strips; 3d, a connecting part; 3e, a connecting ring; 4. a stator; 5. an outer rotor; 6. a rotating shaft; 7. a connecting cover; 7a, a ring body I; 7a1, guide ring; 7b, a second ring body; 7c, a connecting rod; 8. a first bearing; 9. a heat dissipating fin; 10. a first screw; 11. a second screw; 12. and a second bearing.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 and 2, the present vacuum pump driving assembly includes a bracket 1, a motor, and a pump rotor 2 provided on the bracket 1.

In particular, the present invention relates to a method for producing,

as shown in fig. 2, the motor is of the type of an outer rotor motor including a bobbin 3, a stator 4, and an outer rotor 5 in a cylindrical shape. The stator 4 is mounted on the frame 3 and between the outer rotor 5 and the frame 3, and the mounting manner of the stator 4 and the outer rotor 5 is conventional and will not be described in detail herein. Skeleton 3 links firmly with support 1, has on the skeleton 3 along the central bore 3a1 that 2 axial run through settings of pump rotor, is equipped with pivot 6 in the central bore 3a1, and pivot 6 and 5 coaxial arrangements of external rotor, and pivot 6 and pump rotor 2 are the straight line and distribute, and pivot 6 rotates with skeleton 3 to be connected, and 6 one end of pivot links firmly with external rotor 5 through the connecting piece, and the 6 other end of pivot is connected with pump rotor 2. The outer rotor motor has larger torque and torque density, so that the vacuum pump obtains larger starting torque, the working efficiency of the vacuum pump is improved, and the service life of the vacuum pump can be prolonged.

In the present embodiment, it is preferred that,

as shown in fig. 2 and 3, the connector structure is as follows: the connecting piece is a connecting cover 7, and preferably the connecting cover 7 is of a one-piece structure. As shown in fig. 1, the connection cover 7 is composed of a ring body one 7a, a ring body two 7b, and a ring of links 7c disposed between the ring body one 7a and the ring body two 7 b. The second ring body 7b is positioned on the inner side of the first ring body 7a and is coaxially arranged; a circle of connecting rods 7c are circumferentially distributed along the first ring body 7a at intervals, at the moment, a gap exists between every two adjacent connecting rods 7c, and two ends of each connecting rod 7c are respectively connected with the first ring body and the second ring body 7 b; the first ring body 7a and the second ring body 7b are fixedly connected with the outer rotor 5 and the rotating shaft 6 respectively. In an actual product, the second ring body 7b is sleeved on the rotating shaft 6, and the second ring body 7b is fixedly connected with the rotating shaft 6 in a bolt or welding mode; the first ring body 7a extends towards the outer rotor 5 to form a guide ring 7a1 integrally, the guide ring 7a1 is coaxial with the first ring body 7a, the guide ring 7a1 is matched with the outer rotor 5, and the guide ring 7a1 is inserted into the outer rotor 5 and used for installation and guide of the outer rotor 5 and the first ring body 7a, so that assembly is facilitated. In this embodiment, it is preferable that the first ring body 7a and the outer rotor 5 are fixedly connected by welding, and naturally, it is also possible that the outer rotor 5 and the first ring body 7a are fixedly connected by bolts or interference fit.

As shown in fig. 2 and 5, the rotary shaft 6 and the pump rotor 2 are connected as follows: a concave cavity 1a coaxial with the pump rotor 2 is formed on the support 1, the motor is located outside the concave cavity 1a, and the cavity opening of the concave cavity 1a faces the motor. One end of the pump rotor 2 is positioned in the concave cavity 1a, the other end of the pump rotor 2 extends out of the concave cavity 1a, and the other end of the pump rotor 2 forms a seal with the bracket 1 through an oil seal. And a positioning ring 1b is formed on the bottom wall of the concave cavity 1a, the positioning ring 1b is coaxial with the pump rotor 2, and the positioning ring 1b is sleeved outside the pump rotor 2. The end of the rotating shaft 6 far away from the connecting piece extends into the positioning ring 1b and is connected with the pump rotor 2, and the connection mode is as follows: have on the pump rotor 2 and be flat massive installation department, be equipped with the bar groove that matches with the installation department on the 6 terminal surfaces of pivot, bar groove length is along 6 radial extensions of pivot, and the equal opening in bar groove both ends, and the installation department is pegged graft at the bar inslot, makes 6 stable drive pump rotor 2 rotations in pivot. Naturally, it is also possible for the shaft 6 and the pump rotor 2 to be connected by flat keys. Further, a first bearing 8 is arranged in the positioning ring 1b, an outer ring of the first bearing 8 is fixedly connected with the positioning ring 1b, and the pump rotor 2 and the rotating shaft 6 are fixedly connected with an inner ring of the first bearing 8, so that the connecting part 3d of the pump rotor 2 and the rotating shaft 6 is directly supported by the first bearing 8, and the transmission stability and precision are improved. Preferably, the inner rings of the first bearings 8 are fixedly connected with the pump rotor 2 and the rotating shaft 6 in an interference fit mode; and the outer ring of the bearing I8 is fixedly connected with the positioning ring 1b in an interference fit mode.

As shown in fig. 2 and 4, the skeleton 3 has the following structure: skeleton 3 formula structure as an organic whole, skeleton 3 comprises body 3a and the shaping of vertical setting on body 3a outer wall and be annular connecting seat 3 b. The tube body 3a is used for mounting the stator 4, and an inner hole of the tube body 3a is the central hole 3a 1; connecting seat 3b is in between outer rotor 5 and the support 1, and connecting seat 3b links firmly with support 1, and connecting seat 3b blocks cavity 1a accent to prevent impurity such as dust from entering into cavity 1a in, at this moment, connecting seat 3b both had been used for connecting motor and skeleton 3, was used for sheltering from cavity 1a accent again, and in this application, connecting seat 3b possesses the dual-purpose effect of a thing promptly, when simplifying the structure, convenient equipment.

For a further explanation,

as shown in fig. 1, the rotating shaft 6 is fixed with the heat dissipating blades 9, and the connecting cover 7 is located between the heat dissipating blades 9 and the outer rotor 5. A gap exists between the outer rotor 5 and the connecting seat 3b, and the gap is communicated with the inner cavity of the outer rotor 5. During the use, heat dissipation blade 9 follows pivot 6 and rotates to the clearance through two adjacent connecting rods 7c formation is toward the interior air supply of outer rotor 5, and wind discharges through the clearance between outer rotor 5 and the connecting seat 3b, in order to form complete and smooth and easy heat dissipation air flue for the stator 4 heat dissipation improves outer rotor motor job stabilization nature and life-span, makes the purpose of improving vacuum pump work efficiency stably realize.

The connecting seat 3b is pressed on the support 1, the connecting seat 3b is fixedly connected with the support 1 through a first screw 10, and at least two screws 10 are distributed along the circumferential direction of the connecting seat 3 b. Preferably, the number of the first screws 10 is 3, and the mounting manner of the first screws 10 is as follows: the support 1 is provided with a threaded hole which is axially arranged along the connecting seat 3b, the connecting seat 3b is correspondingly provided with through holes, the number of the threaded holes and the number of the screws are 10, the through holes and the positions of the screws are in one-to-one correspondence, the 10 rod parts of the screws penetrate through the through holes and are screwed in the threaded holes, and the 10 head parts of the screws are pressed on the connecting seat 3 b. Further explain, constitute the ring channel that axial cross-section is L shape between connecting seat 3b and the body 3a, the through-hole shaping is on the ring channel diapire, the shaping has the sand grip 3c of round along body 3a circumference equipartition on the ring channel diapire, sand grip 3c length is along the radial extension of body 3a, and sand grip 3c one end extends to body 3a outer wall, the ring channel diapire upwards extends and forms annular connecting portion 3d, connecting portion 3d and screw hole quantity are the same and the position one-to-one, connecting portion 3d hole is above-mentioned through-hole, the other end of sand grip 3c that sets up with connecting portion 3d relatively extends to connecting portion 3d outer wall, and the other end of surplus sand grip 3c extends to the ring channel lateral wall, effectively strengthen the connection stability of connecting seat 3b and support 1.

Furthermore, the connecting ring 3e is integrally formed on the outer wall of the connecting seat 3b, the connecting ring 3e is pressed on the support 1, the connecting ring 3e is fixedly connected with the support 1 through a second screw 11, and at least two second screws 11 are uniformly distributed along the circumferential direction of the connecting ring 3e so as to further enhance the connection stability of the framework 3 and the support 1. The number of the second screws 11 is preferably 3. The edge of the cavity opening of the concave cavity 1a is integrally formed with a baffle ring 1c matched with the connecting ring 3e, the connecting ring 3e is sleeved outside the baffle ring 1c, and the connecting seat 3b is pressed on the baffle ring 1c to guide the installation of the connecting seat 3b, so that the connecting seat 3b is further convenient to be connected with the support 1.

The connection mode of the rotating shaft 6 and the framework 3 is as follows: both ends of the rotating shaft 6 are rotatably connected with the pipe body 3a through a second bearing 12. Further, annular steps are arranged on the inner walls of the two ends of the pipe body 3a, the two bearings 12 are respectively positioned in the two annular steps, the outer rings of the two bearings 12 are pressed on the bottom walls of the annular steps, the rotating shaft 6 is further limited in the axial direction, and the working stability of the vacuum pump is improved.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, and different points are as follows: the connecting piece is a cooling fan, the cooling fan comprises an inner ring and an outer ring which are coaxially arranged, a circle of blades which are uniformly distributed along the circumferential direction of the inner ring are distributed between the inner ring and the outer ring, the inner ring and the outer ring are connected through the blades, and the inner ring and the outer ring are fixedly connected with the rotating shaft 6 and the outer rotor 5 respectively. When the heat dissipation motor is used, the heat dissipation fan rotates along with the rotor to dissipate heat of the stator 4, so that the working stability of the outer rotor motor is improved, and the service life of the outer rotor motor is prolonged. Radiator fan had both been used for connecting external rotor 5 and pivot 6, realized external rotor 5 and the linkage of pivot 6, followed external rotor 5 again and rotated and dispel the heat for stator 4, promptly in this application, radiator fan possesses the dual-purpose effect of a thing, when simplifying the structure, the equipment of being convenient for.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a vacuum pump drive assembly, including support (1), motor and pump rotor (2) of setting on support (1), a serial communication port, the type of motor is external rotor electric machine, external rotor electric machine is including skeleton (3) and the cover that is used for installing stator (4) outside skeleton (3) and be tube-shape external rotor (5), skeleton (3) link firmly with support (1), have on skeleton (3) and run through centre bore (3a1) that set up along pump rotor (2) axial, be equipped with pivot (6) in centre bore (3a1), pivot (6) and external rotor (5) coaxial arrangement, and pivot (6) are straight line distribution with pump rotor (2), pivot (6) rotate with skeleton (3) and are connected, pivot (6) one end links firmly with external rotor (5) through the connecting piece, the pivot (6) other end is connected with pump rotor (2).

2. The vacuum pump driving assembly as claimed in claim 1, wherein the connecting member is a connecting cover (7), the connecting cover (7) is composed of a first ring body (7a), a second ring body (7b) and a ring of connecting rods (7c) arranged between the first ring body (7a) and the second ring body (7b), the second ring body (7b) is located inside the first ring body (7a) and coaxially arranged with the first ring body (7a), the ring of connecting rods (7c) are circumferentially distributed at intervals along the first ring body (7a), two ends of the connecting rods (7c) are respectively connected with the first ring body (7a) and the second ring body (7b), and the first ring body (7a) and the second ring body (7b) are respectively fixedly connected with the outer rotor (5) and the rotating shaft (6).

3. Vacuum pump drive assembly according to claim 2, wherein the rotating shaft (6) is fixed with cooling fins (9) and the connecting cover (7) is located between the cooling fins (9) and the outer rotor (5).

4. The vacuum pump driving assembly as claimed in claim 1, wherein the connecting member is a heat dissipating fan, the heat dissipating fan comprises an inner ring and an outer ring coaxially arranged, a circle of blades uniformly distributed along the circumferential direction of the inner ring is distributed between the inner ring and the outer ring, the inner ring and the outer ring are connected through the blades, and the inner ring and the outer ring are fixedly connected with the rotating shaft (6) and the outer rotor (5) respectively.

5. The vacuum pump driving assembly as claimed in claim 1, wherein the bracket (1) is formed with a cavity (1a) coaxial with the pump rotor (2), the opening of the cavity (1a) is disposed toward the motor, one end of the pump rotor (2) is disposed in the cavity (1a), a positioning ring (1b) is formed on the bottom wall of the cavity (1a), the positioning ring (1b) is sleeved outside the pump rotor (2), one end of the rotating shaft (6) extends into the positioning ring (1b) and is connected with the pump rotor (2), a first bearing (8) is disposed in the positioning ring (1b), the outer ring of the first bearing (8) is fixedly connected with the positioning ring (1b), and both the pump rotor (2) and the rotating shaft (6) are fixedly connected with the inner ring of the first bearing (8).

6. A vacuum pump drive assembly according to claim 5, characterized in that the frame (3) is composed of a vertically arranged tube (3a) and a connecting seat (3b) formed on the outer wall of the tube (3a) and having a ring shape, the tube (3a) is used for mounting the stator (4), the inner hole of the tube (3a) is the central hole (3a1), the connecting seat (3b) is located between the outer rotor (5) and the bracket (1), the connecting seat (3b) is fixedly connected with the bracket (1), and the connecting seat (3b) blocks the cavity opening of the cavity (1 a).

7. The vacuum pump drive assembly according to claim 6, wherein the connecting seat (3b) is pressed against the support (1), the connecting seat (3b) is fixedly connected to the support (1) by a first screw (10), and at least two screws (10) are arranged along the circumference of the connecting seat (3 b).

8. A vacuum pump drive assembly according to claim 7, wherein the bracket (1) has a threaded hole axially arranged along the connecting seat (3b), the connecting seat (3b) is correspondingly provided with a through hole, the threaded hole and the first screw (10) are the same in number and are in one-to-one correspondence in position, the rod part of the first screw (10) passes through the through hole and is screwed in the threaded hole, and the head part of the first screw (10) is pressed on the connecting seat (3 b).

9. A vacuum pump drive assembly according to claim 8, wherein an annular groove having an L-shaped axial cross-section is formed between the connecting base (3b) and the tubular body (3a), the through-hole is formed in a bottom wall of the annular groove, a ring of ribs (3c) are formed on the bottom wall of the annular groove, the ribs (3c) are uniformly arranged along the circumference of the tubular body (3a), the length of the ribs (3c) extends along the radial direction of the tubular body (3a), and one end of each rib (3c) extends to the outer wall of the tubular body (3 a).

10. The vacuum pump drive assembly according to claim 6, wherein both ends of the rotating shaft (6) are rotatably connected to the tube body (3a) through a second bearing (12).