CN210799312U - Diaphragm type vacuum pump and electric automobile - Google Patents

Abstract

The utility model discloses a diaphragm type vacuum pump and electric automobile relates to electric automobile technical field. Drive assembly and drive assembly including the transmission connection, and with the first pump body and the second pump body that the drive assembly is connected, the drive assembly includes transmission push rod and sets up linear bearing on the transmission push rod, so that the transmission push rod is followed linear bearing straight reciprocating motion, the first pump body includes first diaphragm, the second pump body includes the second diaphragm, the both ends of transmission push rod respectively with first diaphragm with the second diaphragm is connected, just first diaphragm with second diaphragm place plane respectively with the transmission push rod is perpendicular, so that the first pump body with the second pump body produces the vacuum. This diaphragm formula vacuum pump can promote the durability and the reliability of first diaphragm and second diaphragm, and then promotes diaphragm formula vacuum pump's stability and life.

Description

Diaphragm type vacuum pump and electric automobile

Technical Field

The utility model relates to an electric automobile technical field particularly, relates to a diaphragm type vacuum pump and electric automobile.

Background

The conventional automobile uses the vacuum degree formed at the position of an engine intake manifold as a vacuum source of a vacuum booster of a brake system, and the new energy automobile does not have an engine and needs a vacuum pump to provide a stable vacuum source for the vacuum booster.

In the prior art, vacuum pumps can be divided into piston pumps, vane pumps, diaphragm pumps and the like. Piston pumps and vane pumps are increasingly being replaced by diaphragm pumps due to the fact that they generate loud noises during operation and are also poor in durability.

The existing diaphragm pump is connected in a mode that a driving cam drives a crank-link mechanism, and a balance block is arranged on an eccentric cam so as to improve the dynamic balance of a connecting structure. In addition, because the diaphragm pump adopts a crank connecting rod structure, the diaphragm pump can also swing when reciprocating, so that the diaphragm of the diaphragm pump is easy to age in the processes of air suction and air exhaust, and the durability and the reliability of the diaphragm pump are further influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a diaphragm formula vacuum pump and electric automobile can promote the durability and the reliability of first diaphragm and second diaphragm, and then promotes diaphragm formula vacuum pump's stability and life.

The embodiment of the utility model is realized like this:

an aspect of the embodiment of the utility model provides a diaphragm vacuum pump, drive assembly and drive assembly including the transmission is connected, and with the first pump body and the second pump body that drive assembly connects, drive assembly includes transmission push rod and sets up linear bearing on the transmission push rod, so that the transmission push rod is followed linear bearing straight reciprocating motion, the first pump body includes first diaphragm, the second pump body includes the second diaphragm, transmission push rod's both ends respectively with first diaphragm with the second diaphragm is connected, just first diaphragm with second diaphragm place plane respectively with transmission push rod is perpendicular, so that the first pump body with the second pump body produces the vacuum.

Optionally, the driving assembly includes an eccentric wheel, the transmission assembly includes a transmission wheel connected to the side surface of the transmission push rod through a rotating shaft, the transmission wheel is connected to the eccentric wheel in a high pair manner, and a plane where the rotation axis of the transmission wheel and the rotation axis of the eccentric wheel are located is parallel to the extending direction of the transmission push rod.

Optionally, the first pump body further includes a first valve seat, the first valve seat and the first diaphragm together form a first cavity, and the first valve seat is provided with a first air inlet and a first air outlet; the second pump body further comprises a second valve seat, the second valve seat and the second diaphragm jointly form a second cavity, and a second air inlet and a second air outlet are formed in the second valve seat.

Optionally, an elastic member is disposed in the first pump body or the second pump body, and the elastic member is configured to provide an elastic force to one end of the transmission push rod, so that the transmission wheel and the eccentric wheel form a high-pair connection.

Optionally, the first pump body further comprises a first connecting seat, the second pump body further comprises a second connecting seat, the first diaphragm is fixedly connected with one end of the transmission push rod through the first connecting seat, and the second diaphragm is fixedly connected with the other end of the transmission push rod through the second connecting seat.

Optionally, the first air inlet, the first air outlet, the second air inlet and the second air outlet are respectively provided with a check valve.

Optionally, the driving assembly further comprises a motor, the eccentric wheel is in transmission connection with the motor through a transmission shaft, and a first bearing and a second bearing are arranged on the transmission shaft at intervals.

Optionally, the first connecting seat and the first diaphragm are vulcanized and formed, and the second connecting seat and the second diaphragm are vulcanized and formed.

Optionally, the number of the linear bearings is two, and the linear bearings are arranged at intervals.

The embodiment of the utility model provides a further aspect provides an electric automobile, include as above arbitrary one the diaphragm vacuum pump.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides a diaphragm formula vacuum pump and electric automobile, drive assembly and the drive assembly who connects through the transmission to and the transmission push rod and the linear bearing who sets up on the transmission push rod through drive assembly, so that drive assembly drives the transmission push rod along linear bearing straight reciprocating motion. Through the first diaphragm and the second diaphragm which are respectively connected with the two ends of the transmission push rod, the first diaphragm and the second diaphragm are driven to deform in the linear reciprocating motion process of the transmission push rod, so that the first pump body and the second pump body are vacuumized. Because the transmission push rod only does the straight reciprocating motion, drive first diaphragm and second diaphragm and do linear deformation in the direction of motion of transmission push rod, can not take place the swing in linear deformation simultaneously, be favorable to promoting the durability and the reliability of first diaphragm and second diaphragm, and then promote diaphragm formula vacuum pump's stability and life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a diaphragm vacuum pump according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a driving assembly and a connecting assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first pump body according to an embodiment of the present invention.

Icon: 100-diaphragm vacuum pump; 110-a drive assembly; 112-eccentric wheel; 114-a motor; 116-a drive shaft; 118-a first bearing; 119-a second bearing; 120-a transmission assembly; 122-a drive ram; 124-linear bearings; 126-a transmission wheel; 130-a first pump body; 132-a first membrane; 134-a first valve seat; 136-a first air inlet; 138-first outlet port; 139-first connection seat; 140-a second pump body; 142-a second diaphragm; 144-a second valve seat; 146-a second air inlet; 148-a second air outlet; 149-a second connecting seat; 150-elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "inside", "outside", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the utility model is usually placed when using, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the present embodiment provides a diaphragm vacuum pump 100, which includes a driving assembly 110 and a transmission assembly 120 in transmission connection, and a first pump body 130 and a second pump body 140 connected to the transmission assembly 120, wherein the transmission assembly 120 includes a transmission push rod 122 and a linear bearing 124 disposed on the transmission push rod 122, so that the transmission push rod 122 linearly reciprocates along the linear bearing 124, the first pump body 130 includes a first diaphragm 132, the second pump body 140 includes a second diaphragm 142, two ends of the transmission push rod 122 are respectively connected to the first diaphragm 132 and the second diaphragm 142, and planes of the first diaphragm 132 and the second diaphragm 142 are respectively perpendicular to the transmission push rod 122, so that the first pump body 130 and the second pump body 140 generate vacuum.

Specifically, the first pump body 130 and the second pump body 140 are located at two sides of the transmission assembly 120, so that two ends of the transmission push rod 122 can be connected to the first diaphragm 132 and the second diaphragm 142, respectively. When the driving assembly 110 drives the transmission push rod 122 to reciprocate linearly along the linear bearing 124, the first diaphragm 132 and the second diaphragm 142 can be driven to deform in the direction of the line of the transmission push rod 122 only by the planes of the first diaphragm 132 and the second diaphragm 142 being perpendicular to the transmission push rod 122. When having avoided using crank connecting rod structure as power, still make the diaphragm produce the swing of side direction when providing deformation to the diaphragm, the ageing of acceleration diaphragm.

Through the linear bearing 124 arranged on the transmission push rod 122, the transmission push rod 122 is limited, and meanwhile, the transmission resistance of the transmission push rod 122 can be reduced, and the transmission push rod 122 is more stable in linear reciprocating motion. It is advantageous to provide a continuous output to the first diaphragm 132 and the second diaphragm 142. The planes of the first diaphragm 132 and the second diaphragm 142 are respectively perpendicular to the transmission push rod 122, so that in the process of linear reciprocating motion of the transmission push rod 122, the first diaphragm 132 and the second diaphragm 142 are prevented from generating oblique force, the service lives of the first diaphragm 132 and the second diaphragm 142 are prolonged, and the use stability of the diaphragm vacuum pump 100 is improved.

It should be noted that, first, the embodiment of the present invention does not specifically limit the shape of the transmission push rod 122, as long as the required transmission requirement can be met. For example, the transmission push rod 122 may be configured as a rectangular push rod, a circular push rod, a regular polygon, or the like. In addition, the linear bearing 124 provided on the transmission push rod 122 may be capable of forming a desired mating transmission relationship with the transmission push rod 122.

Second, the first pump body 130 and the second pump body 140 generate vacuum, and it is necessary to have the basic structure of a diaphragm pump, which is well known in the art, for example, a chamber enclosed by a diaphragm and a valve seat, etc., so that the first pump body 130 and the second pump body 140 can normally generate vacuum when the driving rod 122 reciprocates linearly.

The embodiment of the utility model provides a diaphragm vacuum pump 100, drive assembly 110 and transmission assembly 120 through the transmission is connected to and the transmission push rod 122 and the linear bearing 124 of setting on transmission push rod 122 through transmission assembly 120, so that drive assembly 110 drives transmission push rod 122 along linear bearing 124 straight reciprocating motion. Through the first diaphragm 132 and the second diaphragm 142 respectively connected to the two ends of the transmission push rod 122, the first diaphragm 132 and the second diaphragm 142 are driven to deform during the linear reciprocating motion of the transmission push rod 122, so that the first pump body 130 and the second pump body 140 generate vacuum. Because the transmission push rod 122 only makes a linear reciprocating motion, the first diaphragm 132 and the second diaphragm 142 are driven to make a linear deformation in the motion direction of the transmission push rod 122, and the first diaphragm 132 and the second diaphragm 142 are not swung while making a linear deformation, so that the durability and reliability of the first diaphragm 132 and the second diaphragm 142 are improved, the stability and the service life of the diaphragm vacuum pump 100 are further improved, and the mechanical efficiency is also improved.

As shown in fig. 1 and 2, the driving assembly 110 includes an eccentric wheel 112, the transmission assembly 120 includes a transmission wheel 126 connected to a side surface of the transmission push rod 122 through a rotation shaft, the transmission wheel 126 is connected to the eccentric wheel 112 in a high-order, and a plane in which a rotation axis of the transmission wheel 126 and a rotation axis of the eccentric wheel 112 are located is parallel to an extending direction of the transmission push rod 122.

Specifically, since the plane where the rotation axis of the driving wheel 126 and the rotation axis of the eccentric wheel 112 are located is parallel to the extending direction of the driving push rod 122, when the eccentric wheel 112 rotates along the rotation axis, the driving wheel 126 is pushed to reciprocate along the extending direction of the driving push rod 122 under the action of the eccentricity. The driving wheel 126 is connected with the side surface of the driving push rod 122 through a rotating shaft, when the driving wheel 126 is connected with the eccentric wheel 112 in a high pair (namely, the wheel surface of the driving wheel 126 is abutted against the wheel surface of the eccentric wheel 112), the rotation of the eccentric wheel 112 can drive the driving wheel 126 to rotate together, so that the friction force during transmission is reduced, and the driving push rod 122 can be driven by the driving wheel 126 to reciprocate along with the driving wheel 126.

As shown in fig. 1, the first pump body 130 further includes a first valve seat 134, the first valve seat 134 and the first diaphragm 132 together form a first cavity, and the first valve seat 134 is provided with a first air inlet 136 and a first air outlet 138; the second pump body 140 further includes a second valve seat 144, the second valve seat 144 and the second diaphragm 142 together form a second cavity, and the second valve seat 144 is provided with a second air inlet 146 and a second air outlet 148.

Specifically, when the eccentric wheel 112 rotates and drives the transmission push rod 122 to move in a direction close to the first pump body 130, the first diaphragm 132 is pushed to deform and the volume of the first chamber is reduced, and at this time, the air in the first chamber is discharged through the first air outlet 138. With the continuous rotation of the eccentric wheel 112 and the driving push rod 122 moving in the direction away from the first pump body 130, the first diaphragm 132 returns to the state before deformation, and the volume of the first chamber is increased, at this time, the first chamber sucks air through the first air inlet 136.

The second pump block 140 operates in a state just opposite to that of the first pump block 130. Since the first pump body 130 and the second pump body 140 share one transmission push rod 122, the second pump body 140 discharges air when the first pump body 130 sucks air, and the second pump body 140 sucks air when the first pump body 130 discharges air. Since both the first pump 130 and the second pump 140 have their own exhaust and intake passages (i.e., the first inlet port 136, the first outlet port 138, the second inlet port 146, and the second outlet port 148), the intake of the first pump 130 does not affect the exhaust of the second pump 140, and similarly, the exhaust of the first pump 130 does not affect the intake of the second pump 140. That is, the intake and exhaust of the first pump 130 and the second pump 140 are alternately performed, and the process of the intake and exhaust of the first pump 130 and the second pump 140 is shown by the arrow a and the arrow B in fig. 1 (a represents exhaust, and B represents intake). In this way, the diaphragm vacuum pump 100 can operate more stably and reliably to provide a continuous vacuum environment. In addition, the arrangement of the first inlet port 136 and the first outlet port 138 on the first valve seat 134 and the arrangement of the second inlet port 146 and the second outlet port 148 on the second valve seat 144 also provides a more stable and reliable exhaust and intake path, providing stability during operation. In addition, by adopting the connection mode, the eccentric wheel 112 can normally work in forward rotation or reverse rotation, and the assembly error rate is reduced.

As shown in fig. 1 and 3, an elastic member 150 is disposed in the first pump body 130 or the second pump body 140, and the elastic member 150 is used for providing an elastic force to one end of the transmission push rod 122 so as to make the transmission wheel 126 and the eccentric wheel 112 form a high pair connection.

Specifically, the embodiment of the present invention does not specifically limit the elastic element 150, for example, when the elastic element 150 is disposed in the first pump body 130, according to the position relationship between the driving wheel 126 and the eccentric wheel 112 in fig. 1, the elastic element 150 in the first pump body 130 may be disposed as a compression spring, or an extension spring is disposed in the second pump body 140, when the driving push rod 122 is close to the first pump body 130, the elastic element 150 accumulates elastic potential energy, and when the driving push rod 122 is far away from the first pump body 130, the elastic element 150 recovers the potential energy provided by the elastic deformation to urge the wheel surface of the driving wheel 126 to abut against the wheel surface of the eccentric wheel 112. When the position relationship between the driving wheel 126 and the eccentric wheel 112 is in other forms, the elastic member 150 may be flexibly disposed according to actual requirements, as long as the wheel surface of the driving wheel 126 is abutted against the wheel surface of the eccentric wheel 112. Therefore, the design of the balance block in the conventional transmission mode can be eliminated, and the space and the cost are saved.

As shown in fig. 1, the first pump body 130 further includes a first connecting seat 139, the second pump body 140 further includes a second connecting seat 149, the first diaphragm 132 is fixedly connected to one end of the transmission push rod 122 through the first connecting seat 139, and the second diaphragm 142 is fixedly connected to the other end of the transmission push rod 122 through the second connecting seat 149.

Specifically, when the first connecting seat 139 and the second connecting seat 149 are fixed to the transmission push rod 122, bolts can be used for fixing, so that mutual fixing, dismounting and connecting are facilitated. By adopting the connection mode, the first connection seat 139 can ensure that the first diaphragm 132 is connected with the transmission push rod 122, and meanwhile, the abrasion of the transmission push rod 122 to the first diaphragm 132 during reciprocating motion can be reduced, which is beneficial to prolonging the service life of the first diaphragm 132. The connection form and effect of the second diaphragm 142 and the first diaphragm 132 are the same, and are not described in detail herein.

As shown in FIG. 1, first inlet port 136, first outlet port 138, second inlet port 146, and second outlet port 148 are each a one-way valve.

For example, the check valve at the first inlet port 136 may be disposed on a side of the first valve seat 134 near the first diaphragm 132, and the check valve at the first outlet port 138 may be disposed on a side of the first valve seat 134 away from the first diaphragm 132; the one-way valve at second inlet port 146 may be disposed on a side of second valve seat 144 proximate second diaphragm 142 and the one-way valve at second outlet port 148 may be disposed on a side of second valve seat 144 distal second diaphragm 142. Therefore, the first pump body 130 and the second pump body 140 can suck and exhaust air through specific channels, so that mutual influence between the first pump body 130 and the second pump body 140 is avoided, and the stability and the reliability in use are improved.

As shown in fig. 2, the driving assembly 110 further includes a motor 114, the eccentric wheel 112 is in transmission connection with the motor 114 through a transmission shaft 116, and a first bearing 118 and a second bearing 119 are arranged on the transmission shaft 116 at intervals.

In this way, the torque transmitted by the motor 114 can be ensured to be more stable, and shaft jumping during transmission is avoided. The first bearing 118 and the second bearing 119 are spaced apart from each other on the transmission shaft 116, so that the transmission shaft 116 is prevented from being deformed by force and the rotation of the transmission shaft 116 is more smooth.

Alternatively, the first connecting seat 139 and the first diaphragm 132 are vulcanization molded, and the second connecting seat 149 and the second diaphragm 142 are vulcanization molded. In this way, the overall strength and connection stability between the first connection seat 139 and the first diaphragm 132, and between the second connection seat 149 and the second diaphragm 142 can be improved. The performance when being favorable to guaranteeing to increase of service life avoids the junction fracture to influence normal use.

As shown in fig. 1, the number of the linear bearings 124 is two, and the linear bearings 124 are provided at intervals. Therefore, the straightness of the transmission push rod 122 can be ensured, the traditional sliding friction is changed into rolling friction, the friction force during movement is reduced, the energy of the lost motor 114 is reduced, and the mechanical efficiency is improved.

The embodiment of the utility model provides a still disclose an electric automobile, include above arbitrary diaphragm formula vacuum pump 100. The electric vehicle includes the same structure and advantageous effects as the diaphragm vacuum pump 100 in the foregoing embodiment. The structure and advantages of the diaphragm vacuum pump 100 have been described in detail in the foregoing embodiments, and are not described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a diaphragm type vacuum pump, its characterized in that, including drive assembly and the drive assembly that the transmission is connected, and with the first pump body and the second pump body that the drive assembly is connected, the drive assembly includes transmission push rod and sets up linear bearing on the transmission push rod, so that the transmission push rod is followed linear bearing straight reciprocating motion, the first pump body includes first diaphragm, the second pump body includes the second diaphragm, the both ends of transmission push rod respectively with first diaphragm with the second diaphragm is connected, just first diaphragm with second diaphragm place plane respectively with the transmission push rod is perpendicular, so that the first pump body with the second pump body produces the vacuum.

2. The diaphragm vacuum pump according to claim 1, wherein the driving assembly comprises an eccentric wheel, the transmission assembly comprises a transmission wheel connected with the side surface of the transmission push rod through a rotating shaft, the transmission wheel is connected with the eccentric wheel in a high pair, and a plane where the rotating axis of the transmission wheel and the rotating axis of the eccentric wheel are located is parallel to the extending direction of the transmission push rod.

3. The diaphragm vacuum pump according to claim 2, wherein the first pump body further comprises a first valve seat, the first valve seat and the first diaphragm together form a first cavity, and a first air inlet and a first air outlet are arranged on the first valve seat; the second pump body further comprises a second valve seat, the second valve seat and the second diaphragm jointly form a second cavity, and a second air inlet and a second air outlet are formed in the second valve seat.

4. The diaphragm vacuum pump according to claim 3, wherein an elastic member is disposed in the first pump body or the second pump body, and the elastic member is configured to provide an elastic force to an end of the transmission push rod, so that the transmission wheel and the eccentric wheel form a high pair connection.

5. The diaphragm vacuum pump according to claim 3 or 4, wherein the first pump body further comprises a first connecting seat, the second pump body further comprises a second connecting seat, the first diaphragm is fixedly connected with one end of the transmission push rod through the first connecting seat, and the second diaphragm is fixedly connected with the other end of the transmission push rod through the second connecting seat.

6. The diaphragm vacuum pump of claim 3 or 4, wherein the first air inlet, the first air outlet, the second air inlet and the second air outlet are respectively provided with a one-way valve.

7. The diaphragm vacuum pump of claim 2, wherein the drive assembly further comprises a motor, the eccentric is in transmission connection with the motor through a transmission shaft, and the transmission shaft is provided with a first bearing and a second bearing at intervals.

8. The diaphragm vacuum pump of claim 5, wherein the first connecting seat and first diaphragm are vulcanization molded, and the second connecting seat and second diaphragm are vulcanization molded.

9. The diaphragm vacuum pump according to claim 2, wherein the number of the linear bearings is two, and the linear bearings are arranged at intervals.

10. An electric vehicle comprising a diaphragm vacuum pump according to any one of claims 1 to 9.

Images