阅读说明：本技术 一种均分电子真空泵定转子间隙的夹具 (Clamp for equally dividing gaps between stator and rotor of electronic vacuum pump ) 是由 谭著 许仲秋 董仁泽 于 2020-08-06 设计创作，主要内容包括：本发明提供了一种均分电子真空泵定转子间隙的夹具,所述真空泵包括电机、下盖板、定子、转子,电机上设有法兰,下盖板安装在法兰上,定子安装在下盖板上,法兰上设有螺纹孔,下盖板和定子上设有与法兰的螺纹孔位置相对应的螺栓过孔,电机轴依次穿过法兰、下盖板、定子和转子的轴孔；定子上设有进气槽和用于容纳转子的椭圆内腔；所述夹具包括均分架和四根定位杆,均分架整体为十字形,其中部设有定位套管,外周设有四个与法兰的螺纹孔相对应的通孔；均分架通过定位套管固定在电机轴的端部,四根定位杆分别穿过均分架的通孔和定子、下盖板上的螺栓过孔并插入到法兰的螺纹孔内。从而就能够对定转子之间的径向间隙进行均分。(The invention provides a clamp for equally dividing gaps between a stator and a rotor of an electronic vacuum pump, wherein the vacuum pump comprises a motor, a lower cover plate, a stator and a rotor, wherein the motor is provided with a flange, the lower cover plate is arranged on the flange, the stator is arranged on the lower cover plate, the flange is provided with a threaded hole, the lower cover plate and the stator are provided with bolt through holes corresponding to the threaded hole of the flange, and a motor shaft sequentially penetrates through shaft holes of the flange, the lower cover plate, the stator and the rotor; the stator is provided with an air inlet slot and an elliptical inner cavity for accommodating the rotor; the fixture comprises an equalizing frame and four positioning rods, the equalizing frame is integrally cross-shaped, a positioning sleeve is arranged in the middle of the equalizing frame, and four through holes corresponding to threaded holes of the flange are formed in the periphery of the equalizing frame; the equal-division frame is fixed at the end part of the motor shaft through a positioning sleeve, and the four positioning rods respectively penetrate through holes of the equal-division frame and bolt through holes in the stator and the lower cover plate and are inserted into threaded holes of the flanges. Thereby, the radial clearance between the stator and the rotor can be equally divided.)

1. The utility model provides a divide equally anchor clamps in electron vacuum pump stator and rotor clearance which characterized in that: the vacuum pump comprises a motor (9), a lower cover plate (7), a stator (5) and a rotor (6), wherein a flange (10) is arranged on the motor (9), the lower cover plate (7) is arranged on the flange (10), the stator (5) is arranged on the lower cover plate (7), a threaded hole (11) is formed in the flange (10), bolt through holes (14) corresponding to the threaded hole (11) of the flange are formed in the lower cover plate (7) and the stator (5), and a motor shaft (8) sequentially penetrates through shaft holes (15) of the flange (10), the lower cover plate (7), the stator (5) and the rotor (6); the rotor (6) is provided with a blade groove (16); the stator (5) is provided with an air inlet groove (18) and an elliptical inner cavity (17) for accommodating the rotor (6); the fixture comprises an equalizing frame (3) and four positioning rods (2), the equalizing frame (3) is overall in a cross shape, a positioning sleeve (4) is arranged in the middle of the equalizing frame, and four through holes (19) corresponding to threaded holes (11) of the flange are formed in the periphery of the equalizing frame; the uniform distribution frame (3) is fixed at the end part of the motor shaft (8) through a positioning sleeve (4), and the four positioning rods (2) respectively penetrate through holes (19) of the uniform distribution frame, a stator (5) and bolt through holes (14) in the lower cover plate (7) and are inserted into threaded holes (11) of the flange.

2. The fixture for dividing the gap between the stator and the rotor of the electronic vacuum pump evenly according to claim 1, wherein: the neck of the positioning rod (2) is a conical body (1).

3. The clamp for dividing the gap between the stator and the rotor of the electronic vacuum pump evenly according to claim 1 or 2, wherein: the through hole (19) on the equal-dividing frame is a counter bore.

4. The clamp for dividing the gap between the stator and the rotor of the electronic vacuum pump evenly according to claim 1 or 2, wherein: the flange (10) is provided with a positioning pin (12), and the lower cover plate (7) is provided with a positioning hole (13).

Technical Field

The invention relates to the technical field of vacuum pumps, in particular to a clamp for equally dividing gaps between a stator and a rotor of an electronic vacuum pump.

Background

The electronic vacuum pump is a main part of a brake boosting system on an automobile, and the brake system on an automobile chassis is of great importance to the safety of automobile driving, but the assembly of the electronic vacuum pump needs to adjust the radial clearance between a stator and a rotor.

The driving source of the electronic vacuum pump is a motor, after the electronic vacuum pump is electrified, the motor rotates, a motor shaft drives a rotor to rotate through torque, and the rotor drives a blade to rotate so as to extract vacuum; because the rotor rotates in the stator cavity, a small gap must be formed between the periphery of the rotor and the side wall of the stator cavity, and the control requirement of the gap is strict. However, when the parts are designed, the size of the gap is already determined by the outer diameter of the rotor and the elliptical inner cavity of the stator, and the inner cavity of the stator is in a centrosymmetric structure, so that the gap between the rotor and the stator also needs to be uniformly divided.

Disclosure of Invention

The invention aims to solve the problems and provides a fixture for equally dividing the gaps between the stator and the rotor of an electronic vacuum pump, which can equally divide the radial gaps between the stator and the rotor on the same axis, so that the rotor cannot be rubbed due to the excessively small gap between the circumference and the side wall of the inner cavity of the stator, and the service life of the rotor is shortened; the leakage amount cannot be increased due to overlarge clearance between the circumference and the inner cavity of the stator, and the performance cannot be influenced.

In order to solve the technical problems, the invention adopts the following technical scheme: a fixture for equally dividing gaps between a stator and a rotor of an electronic vacuum pump comprises a motor, a lower cover plate, a stator and a rotor, wherein a flange is arranged on the motor, the lower cover plate is arranged on the flange, the stator is arranged on the lower cover plate, a threaded hole is formed in the flange, bolt through holes corresponding to the positions of the threaded hole of the flange are formed in the lower cover plate and the stator, and a motor shaft sequentially penetrates through shaft holes of the flange, the lower cover plate, the stator and the rotor; the rotor is provided with a blade groove; the stator is provided with an air inlet groove and an elliptical inner cavity for accommodating the rotor; the fixture comprises an equalizing frame and four positioning rods, the equalizing frame is overall in a cross shape, a positioning sleeve is arranged in the middle of the equalizing frame, and four through holes corresponding to threaded holes of the flange are formed in the periphery of the equalizing frame; the equal-division frame is fixed at the end part of the motor shaft through a positioning sleeve, and the four positioning rods respectively penetrate through holes of the equal-division frame and bolt through holes in the stator and the lower cover plate and are inserted into threaded holes of the flanges.

Preferably, the neck of the positioning rod is a cone.

Preferably, the through holes on the uniform distribution frame are counter bores.

Furthermore, the flange is provided with a positioning pin, and the lower cover plate is provided with a positioning hole.

The using method of the invention is as follows: the positioning sleeve on the equal-dividing frame is aligned to the motor shaft, the four positioning rods penetrate through the four through holes on the periphery of the equal-dividing frame and are aligned to the four bolt through holes on the periphery of the stator, the stator is slowly pressed downwards by force, and the stator can be automatically adjusted to the position taking the motor shaft as the geometric center under the limitation of the positioning rods and the positioning sleeve, so that the purpose of uniform gap division is achieved.

Drawings

FIG. 1 is an exploded view of a vacuum pump and a clamp according to an embodiment of the present invention;

FIG. 2 is an overall top view of a vacuum pump and fixture in an embodiment of the invention after installation;

FIG. 3 is a top view of the motor of FIG. 1;

FIG. 4 is a top view of the lower deck of FIG. 1;

FIG. 5 is a top view of the rotor of FIG. 1;

FIG. 6 is a top view of the stator of FIG. 1;

FIG. 7 is a top view of the averaging block of FIG. 1;

FIG. 8 is a cross-sectional view of the averaging block of FIG. 7;

FIG. 9 is a front view of the locating rod of FIG. 1;

the reference signs are:

1-conical body 2-positioning rod 3-even distribution frame

4-positioning sleeve 5-stator 6-rotor

7-lower cover plate 8-motor shaft 9-motor

10-flange 11-threaded hole 12-positioning pin

13-positioning hole 14-bolt through hole 15-shaft hole

16-vane slot 17-elliptical internal cavity 18-air inlet slot

19-through hole.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

As shown in fig. 1 to 9, the preferred embodiment of the present invention is: a fixture for equally dividing gaps between a stator and a rotor of an electronic vacuum pump comprises a motor 9, a lower cover plate 7, a stator 5 and a rotor 6, wherein a flange 10 is arranged on the motor 9, the lower cover plate 7 is arranged on the flange 10, the stator 5 is arranged on the lower cover plate 7, a threaded hole 11 is arranged on the flange 10, bolt through holes 14 corresponding to the threaded hole 11 of the flange are arranged on the lower cover plate 7 and the stator 5, and a motor shaft 8 sequentially penetrates through shaft holes 15 of the flange 10, the lower cover plate 7, the stator 5 and the rotor 6; the flange is provided with a positioning pin 12, the lower cover plate is provided with a positioning hole 13, the rotor 6 is provided with a blade groove 16, and the stator 5 is provided with an air inlet groove 18 and an elliptical inner cavity 17 for accommodating the rotor 6; the fixture comprises an equalizing frame 3 and four positioning rods 2, the equalizing frame 3 is overall in a cross shape, a positioning sleeve 4 is arranged in the middle of the equalizing frame, four through holes 19 corresponding to the threaded holes 11 of the flange are arranged on the periphery of the equalizing frame, and the through holes 19 are counter bores; the uniform distribution frame 3 is fixed at the end part of the motor shaft 8 through a positioning sleeve 4, and the four positioning rods 2 respectively penetrate through holes 19 of the uniform distribution frame and bolt through holes 14 on the stator 5 and the lower cover plate 7 and are inserted into threaded holes 11 of the flange; the neck of the positioning rod 2 is a cone 1.

The method of use of this example is as follows:

1) installing a lower cover plate: after the motor 9 is fixed by a tool clamp, other auxiliary parts such as a sealing ring and the like are installed, a positioning pin 12 on the flange 10 is matched with a positioning hole 13 of the lower cover plate to perform positioning, and the lower cover plate 7 is installed;

2) roughly installing a stator: the four bolt through holes 14 on the stator 5 are all provided with position degrees, the stator 5 is made of powder metallurgy and is a die part, so that the position degrees of the stator 5 are kept consistent with those of the die (the uniform frame is customized), the four bolt through holes 14 of the stator 5 are aligned to the four bolt through holes 14 of the lower cover plate 7, and the position of the stator 5 is roughly positioned;

3) installing a rotor: the rotor 6 is arranged on the motor shaft 8, and the motor shaft 8 and the shaft hole 15 of the rotor 6 are in small clearance fit, so that the rotor 6 can be precisely positioned at the longitudinal central axis of the whole body by using the motor shaft 8;

4) and (3) dividing the clearance between the stator and the rotor equally:

a. in design, the distance between the two positioning rods 2 in the coaxial direction on the equal-dividing frame 3 is equal to the distance between the two bolt through holes 14 on the stator 5, and the stator 5 is adjusted to the position taking the motor shaft 8 as the geometric center by utilizing the motor shaft 8 to be positioned at the center of the whole body, so that the purpose of equally dividing the radial gap between the stator 5 and the rotor 6 is achieved;

b. the positioning sleeve 4 on the equalizing frame 3 can completely cover the motor shaft 8 and accurately position the motor shaft 8 to the center of the positioning sleeve;

c. the positioning rod 2 is accurately positioned through countersunk through holes 19 on the periphery of the equalizing frame 3, the end part of the positioning rod 2 passes through the lower cover plate 7 and then is inserted into a threaded hole 11 of the flange, so that the coarse positioning function is realized, and the subsequent bolt installation positioning can be realized; the neck of locating lever 2 is cone 1, when dividing 3 tops to press hard equally, this cone 1 can closely cooperate with the bolt via hole on the stator, and because the motor shaft 8 of central point puts is fixed throughout, will force the bolt via hole 14 on the stator 5 to slowly fine-tune to the position coaxial with locating lever 2 like this, stator 5 then accurate location to the position of using motor shaft 8 as the center, finally reaches the purpose of dividing the rotor clearance equally.

In conclusion, the embodiment can accurately and equally divide the rotor clearance, is fast and effective to implement, is simple and convenient to operate, can be simply introduced into a production line flow mechanism for mass production, and saves the cost; however, the structure cannot measure the clearance between the stator and the rotor, so the size of the stator inner cavity and the size of the rotor outer diameter need to be confirmed before the design, and the clearance between the stator and the rotor can be known.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.