KR101347742B1 - Pump Unit and Vacuum Pump for Vehicle - Google Patents

Abstract

The present invention relates to a pump unit and a vehicle vacuum pump. The present invention includes a motor unit having a motor for generating a rotational force; And a pump unit coupled to the motor unit to generate a vacuum, wherein the pump unit comprises a cam ring; An upper plate installed at an upper portion of the cam ring; And a base plate disposed below the cam ring, wherein the cam ring has an inlet chamber communicating with an air outlet formed in the base plate and an outlet chamber communicating with an air outlet formed in the upper plate. Provided is a vehicle vacuum pump.
According to the invention it is possible to reduce the noise generated during the discharge of air while driving the vacuum pump.

Description

Pump Unit and Vacuum Pump for Vehicle

The present invention relates to a pump unit and a vacuum pump for a vehicle, and more particularly, to a pump unit and a vacuum pump for a vehicle that can reduce noise and prevent overheating.

The vehicle is provided with a vacuum pump for forming a vacuum pressure for use in a braking system or the like.

A conventional vacuum pump is connected to a brake booster or a vacuum chamber to perform air extraction in the brake booster or the vacuum chamber.

The configuration of the vacuum pump for performing such a function includes a motor and a rotor connected to the motor to rotate at a high speed to form a low pressure state around the motor to extract air from the brake booster or the vacuum chamber.

When the air pressure of the pressure inside the brake booster or the vacuum chamber is higher than a predetermined reference, the motor rotates the rotor to draw the air inside the vacuum chamber or the brake booster to the outside so that the vacuum state can be maintained.

However, in the conventional vacuum pump, since the air discharged while the rotor rotates is discharged to the outside, noise caused by the movement of the air is generated.

In addition, there is a problem that the vacuum pump is overheated due to the heat generated while the rotor rotates.

Various studies have been made to solve these problems.

The present invention is to solve the above problems, the present invention is to provide a pump unit and a vehicle vacuum pump that can reduce the noise generated when the vacuum pump is driven.

In addition, the present invention is to provide a pump unit and a vacuum pump for a vehicle that can easily discharge the heat generated during the operation of the vacuum pump to the outside to prevent overheating.

In order to achieve the above object, the present invention is a cam ring; An upper plate installed at an upper portion of the cam ring; And a base plate installed below the cam ring, wherein the cam ring is provided with a chamber communicating with an air outlet formed in the base plate, and the chamber is sealed by the upper plate and the base plate. It provides a pump unit.

In particular, the cam ring is formed with a hollow in which the rotor is accommodated, and the chamber may be disposed between the hollow and an outer circumferential surface of the cam ring.

The upper plate may be provided with an air discharge port communicating with the chamber.

Preferably, the chamber may be formed of a plurality, and may further include a communication path for communicating air by communicating the plurality of chambers.

The communication path may include an upper communication path for communicating an upper side of the chamber, and a lower communication path for communicating a lower side of the chamber.

In particular, the upper communication path and the lower communication path may be installed alternately with each other.

The communication path may include a right communication path for communicating the right side of the chamber and a left communication path for communicating the left side of the chamber, wherein the right communication path and the left communication path are alternately provided with each other. Do.

The communication path may have a smaller cross-sectional area than one side of the chamber.

The present invention also includes a motor unit having a motor for generating a rotational force; And a pump unit coupled to the motor unit to generate a vacuum, wherein the pump unit comprises a cam ring; An upper plate installed at an upper portion of the cam ring; And a base plate installed below the cam ring, wherein the cam ring is provided with an inlet chamber communicating with an air outlet formed in the base plate and an outlet chamber communicating with an air outlet formed in the upper plate. Provided is a vehicle vacuum pump.

In particular, the cam ring is provided with a hollow for accommodating the rotor, and the inlet chamber and the outlet chamber may be disposed between the hollow and the outer circumferential surface of the cam ring.

Of course, it may further include a transfer chamber for transferring the air introduced into the inlet chamber to the outlet chamber.

It is preferable to further include an upper communication path for communicating the upper side of the inlet chamber and the transfer chamber, the lower communication path for communicating the lower side of the delivery chamber and the outlet chamber.

The transfer chamber may be formed in plural, and may further include a communication path for communicating air by communicating the plurality of transfer chambers.

The communication path may include an upper communication path communicating with an upper side of the delivery chamber and a lower communication path communicating with a lower side of the delivery chamber, and the upper communication path and the lower communication path are alternately provided with each other. It is preferable.

The communication path may include a right communication path for communicating the right side of the delivery chamber and a left communication path for communicating the left side of the delivery chamber, wherein the right communication path and the left communication path are alternately installed. desirable.

According to the invention it is possible to reduce the noise generated during the discharge of air while driving the vacuum pump.

In addition, the present invention can prevent the vacuum pump from overheating.

1 is a perspective view of the vehicle vacuum pump combined according to the present invention.
Figure 2 is an exploded perspective view of a vehicle vacuum pump according to the present invention.
3 is a perspective view of main parts of a vehicle vacuum pump according to the present invention;
4 is a plan view of the cam ring;
5 is a bottom view of the cam ring.
6 is an AA cross-sectional view of the cam ring.
7 is a BB cross-sectional view of the cam ring.
8 shows the results of experiments comparing the present invention with the prior art;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

1 is a combined perspective view of a vehicle vacuum pump according to the present invention, Figure 2 is an exploded perspective view of a vehicle vacuum pump according to the present invention. This will be described below with reference to Figs. 1 and 2. Fig.

Vacuum pump 1 according to the present invention is a pump unit 100, the chamber unit 200 is installed on the pump unit 100, the lower side of the pump unit 100 is connected to the motor unit 300 This is installed.

The pump unit 100 is formed by the combination of the rotor unit 110, the base plate 120 and the upper plate 130. An upper plate 130 is installed at an upper portion of the rotor unit 110 and a base plate 120 is installed at a lower portion thereof. The pump unit 100 is provided with a hollow 104 for receiving the rotor portion 110, the rotor portion 110 is rotated inside the hollow 104 may be provided with a vacuum state.

The rotor unit 110 is installed inside the cam ring 102. The rotor unit 110 is configured to include a rotor 110a and a vane 110b inserted into a slot provided in the rotor 110a.

An air inlet 122 and an air outlet 124 are disposed below the cam ring 102 to allow air to be sucked in and discharged from the base plate 120, and an upper plate 130 is provided above the cam ring 102. .

The chamber 200 includes an inner cap 210 and an outer cap 220. The inner cap 210 covers the upper side of the upper plate 130, the outer cap 220 covers the upper side of the inner cap 210 and is fixed to the motor unit 300.

The inner cap 210 and the outer cap 220 are installed in communication with each other in a state in which the motor unit 300 is installed. That is, the air discharged to the inner cap 210 is installed to move to the outer cap 300. .

The inner cap 210 and the outer cap 220 may be made of the same material or may be made of different materials. When the inner cap 210 and the outer cap 220 are made of different materials, any one of plastic, aluminum, or stainless steel is used as the inner cap 210 or the outer cap 220.

Preferably, the inner cap 210 is made of aluminum, and the outer cap 220 is advantageous when using stainless steel in view of noise reduction. Because the inner cap 210 uses aluminum with less vibration due to pressure fluctuations to attenuate high frequency noise, and the outer cap 220 is made of hard stainless steel having a hard characteristic to attenuate low frequency noise. It is advantageous.

The inner cap 210 is provided with a through hole 214 in the flange 216 vertically bent outward of the inner cap 210 to be fixed to the upper surface of the motor unit 300.

The lower surface of the pump unit 100 is provided with a packing member 400 for reducing the vibration generated while the pump unit 100 is operated, and to prevent the leakage of high-pressure discharge air.

The packing member 400 is installed between the pump unit 100 and the motor unit 300 while compressing at least 30% of the initial thickness when the pump unit 100 is installed in the motor unit 300. .

As such, the packing member 400 plays a role of damping and a sealing function at the lower side of the pump unit 100. The packing member 400 is provided with a packing hole 410 in communication with the suction port 122.

The motor 310 is installed inside the motor unit 300, and the motor 310 is prevented from being separated to the outside by a fixing cap provided at a lower side thereof. The motor 310 accommodated in the motor unit 300 is provided with a motor shaft 312 on one side.

The motor shaft 312 is accommodated in the hollow 140 of the rotor 110a to transmit the rotational force of the motor 310 to the rotor 110a. That is, when the motor shaft 312 is rotated, the rotor 110a is also rotated together, so that a vacuum may be generated inside the hollow 104 of the cam ring 102.

3 is a perspective view of main parts of a vacuum pump for a vehicle according to the present invention; This will be described below with reference to Fig.

The pump unit according to the present invention includes a cam ring 102, an upper plate 130 installed on an upper portion of the cam ring 102, and a base plate 120 installed on a lower portion of the cam ring 102. The pump unit is a component that can be used as it is in a vehicle vacuum pump according to the present invention. That is, the configuration described in FIG. 3 may be applied to the vehicle vacuum pump according to FIGS. 1 and 2 as it is.

On the other hand, the cam ring 102 is provided with a chamber 150 in communication with the air outlet 124 formed in the base plate 120.

The chamber 150 is preferably extended from the upper outer peripheral surface to the lower outer peripheral surface of the cam ring 102 to ensure sufficient space therein. That is, when only the cam ring 102 except for the base plate 120 and the upper plate 130 is examined, the chamber 150 forms a space in which openings are formed at both the upper side and the lower side.

In this case, the air outlet 124 is an outlet from which the air discharged from the air inlet 320 introduced from the outside is completed and the vacuum is generated in the hollow 104 of the cam ring 102. The air outlet 124 is formed in the base plate 120, and is provided to correspond to a surface where the hollow 104 of the cam ring 102 meets the outer circumferential surface of the cam ring 102.

In addition, the upper plate 130 is formed with an air discharge port 132 communicating with the chamber 150. The air discharge port 132 functions as an outlet for discharging air passing through the air discharge port 124 and the chamber 150 to the outside of the vacuum pump.

Meanwhile, the chamber 150 is sealed by the upper plate 130 and the base plate 120. That is, the air introduced into the chamber 150 may be moved in the chamber 150 because the upper part is sealed by the upper plate 130 and the lower part is sealed by the base plate 120.

In particular, the chamber 150 is preferably disposed between the hollow 104 and the outer circumferential surface of the cam ring 102. As a result, the chamber 150 may be sealed with the upper and lower portions by the upper plate 130 and the base plate 120.

At this time, the chamber 150 is preferably made of a plurality.

Hereinafter, the chambers 150 will be described by dividing the names of the plurality of chambers in order to describe in more detail.

The chamber 150 includes an inlet chamber 152 that communicates with the air outlet 124 and an outlet chamber 154 that communicates with an air outlet 132 formed in the upper plate 130. That is, the inlet chamber 152 is provided adjacent to the air outlet 124, and the outlet chamber 154 is provided adjacent to the air outlet 132.

Meanwhile, the chamber 150 may further include a delivery chamber 156 that delivers air introduced into the inlet chamber 152 to the outlet chamber 154. Since the delivery chamber 156 is installed to be spaced apart from the air outlet 132 and the air outlet 124, the inlet chamber 152 and the outlet chamber 154 may be separated.

In particular, the inlet chamber 152, the transfer chamber 156, and the outlet chamber 154 are preferably disposed between the hollow 104 and the outer circumferential surface of the cam ring 102. That is, the present invention does not require any additional parts to provide the chamber 150, and uses the dead space of the cam ring, which is conventionally used, that is, a space that has been left unused in the conventional vacuum pump. There is an advantage that can be easily applied. In addition, since the size of the pump unit does not need to increase due to the chamber 150, the size of the vehicle vacuum pump does not need to increase as a whole.

As shown in FIG. 3, the transfer chamber 156 according to the present invention includes a first transfer chamber 156a provided adjacent to the inlet chamber 152 and a third provided adjacent to the outlet chamber 154. The transfer chamber 156c includes a second transfer chamber 156b provided between the first transfer chamber 156a and the third transfer chamber 156c. In the drawings, the transfer chamber 156 is limited to three. However, when the present invention is applied, it is possible to reduce or increase the number of the transfer chambers in some cases. For example, when the second transfer chamber 156b is omitted from the transfer chamber 156, the number of the transfer chambers 156 may be reduced. On the other hand, if the number of the second transfer chambers 156b is increased to two or more, the number of the transfer chambers 156 may increase.

In addition, the present invention includes a communication path 160 for communicating air by communicating with the plurality of chambers 150. The communication path 160 will be described in detail with reference to the other drawings below.

4 is a plan view of the cam ring, FIG. 5 is a bottom view of the cam ring, FIG. 6 is an A-A sectional view of the cam ring, and FIG. 7 is a B-B sectional view of the cam ring. A description with reference to FIGS. 3 to 7 is as follows.

For reference, the A-A cross section of the cam ring is the same as the A'-A 'cross section, and the B-B cross section of the cam ring is the same as the B'-B' cross section. Therefore, the contents described in the A-A cross-sectional view and the B-B cross-sectional view may be applied to the A'-A 'cross section and the B'-B' cross section.

4 and 5, the communication path 160 includes a right communication path 162 for communicating the right side of the chamber 150, and a left communication path for communicating the left side of the chamber 150 ( 164).

At this time, it is preferable that the right communication path 162 and the left communication path 164 are alternately installed. That is, when the right communication path 162 is provided between the inlet chamber 152 and the first transfer chamber 156a, between the first transfer chamber 156a and the second transfer chamber 156b. It is preferable that the left communication path 164 is provided. In addition, the right communication path 162 may be provided between the second transfer chamber 156b and the third transfer chamber 156c. Preferably, the left communication path 164 is provided in the third transfer chamber 156c and the outlet chamber 154.

By alternately installing the right communication path 162 and the left communication path 164, the flow path of air moving inside the chamber 150 may be lengthened. The longer the flow path of the air, the longer the time the air is accommodated in the chamber 150, the longer the heat exchange time between the cam ring 102 and the air is increased. Therefore, even when the temperature of the cam ring 102 rises, cooling can be easily performed by heat exchange with air.

Furthermore, when the flow path of the air is long, even if the pressure of the air discharged through the air outlet 124 is periodically changed, since the pressure can be controlled by the internal space of the chamber 150, the air outlet 132 The deviation of the pressure of the air discharged through is reduced. Therefore, noise and vibration that may be generated due to the change in pressure of the discharged air may be reduced.

6 and 7, the communication path 160 includes an upper communication path 162 for communicating an upper side of the inlet chamber 152 and the upper first transfer chamber 156a, and the third transfer chamber. 156c and a lower communication path 164 communicating the lower side of the outlet chamber 154 may be included. Referring to FIG. 7, a lower communication path 164 for communicating a lower side of the first transfer chamber 156a and the second transfer chamber 156b is disclosed.

Air introduced into the inlet chamber 152 is introduced through the air outlet 124 formed in the base plate 120. Therefore, the air moved from the inlet chamber 152 to the first transfer chamber 156a is moved through the upper communication path 162 formed above the chamber 150. Therefore, since the air may rise in the inlet chamber 152, the air path may be long.

On the other hand, the first transfer chamber 156a and the second transfer chamber 156b communicate with each other by a lower communication path 164. Therefore, the air moved to the first transfer chamber 156a through the upper communication path 162 moves to the lower portion of the first transfer chamber 156a and passes through the lower communication path 164 to the second. Moved to delivery chamber 156b. Therefore, since the air may descend in the first transfer chamber 156a, the air path may be long.

Similarly, the second transfer chamber 156b and the third transfer chamber 156c communicate with each other by the upper communication path 162.

On the other hand, the air drawn into the outlet chamber 154 is discharged in an upward manner toward the air discharge port 132 formed in the upper plate 130. However, since the third transfer chamber 156c and the outlet chamber 154 are communicated with each other by the lower communication path 164, a movement path of air may be long.

As described above, the upper communication path 162 and the lower communication path 164 may be alternately provided. Therefore, the air is moved from the upper side to the lower side or from the lower side to the upper side.

In the present invention, for convenience of description, the upper communication path 162 and the right communication path 162 are designated by the same reference numerals, and the lower communication path 164 and the left communication path 164 are designated by the same reference numerals. Explained. However, this description is limited for convenience, and the upper communication path 162 and the left communication path 164 are described with the same reference numerals, and the lower communication path 164 and the right communication path 162 are the same drawings. It is possible to be described by reference. In this case, of course, it is necessary to correct the direction in which the right communication path and the left communication path are formed. Such modifications are to the extent that those skilled in the art can easily make modifications based on the contents described in the present invention, and thus detailed illustration and description are omitted.

In addition, the above-described communication path 160 preferably has a smaller cross-sectional area than one side surface of the chamber 150. If the cross-sectional areas of the chamber 150 and the communication path 160 are the same, in conclusion, the chamber 150 has a shape in which the chamber 150 extends greatly into one. In this case, air is the air outlet 124 and the chamber. Since the air is discharged to the air outlet 132 after passing through 150, a disadvantage may occur in that the air has a shorter movement path in the chamber 150.

The vehicle vacuum pump of the present invention described above operates as follows.

When the driver is driving along the road while checking the braking of the vehicle ahead and turning on the brake pedal, the vacuum pump 1 is operated to generate a braking force to the brake system provided in the vehicle.

In order to supply the necessary vacuum to the booster bag (not shown), the vacuum pump 1 rotates the motor shaft 312 provided in the motor 310, and the rotor 110a to which the motor shaft 312 is connected is rotated in one direction. Is rotated.

The vane 110b is moved along the slot hole while rubbing with the inner circumferential surface of the cam ring 102 by the rotation of the rotor 110a, and sucks air necessary for vacuum generation through the air inlet 320.

As the rotor 110a is rotated at a high speed, the inlet air introduced through the air inlet 320 and the inlet 122 is compressed by the rotor 110a and discharged to the outlet 124. Since the rotor 110a is rotated at high speed, the exhaust air is discharged to the air outlet 124.

The air discharged to the air outlet 124 is moved to the inlet chamber 152. Air is then raised in the inlet chamber 152. Air is moved to the upper communication path 162 and is moved to the first transfer chamber 156a through the upper communication path 162.

Air is moved downwardly in the first transfer chamber 156a to the second transfer chamber 156b through the lower communication path 164. In addition, air is moved to the third transfer chamber 156c through the upper communication path 162.

Air is guided to the outlet chamber 154 through the lower communication path 164 while descending the air in the third transfer chamber 156c. Finally, air is discharged from the pump unit while rising in the outlet chamber 154 and ascending through the air discharge port 132.

As described above, since the air alternately passes through the upper communication path 162 and the lower communication path 164, the movement path of the air may be long. This is because the air can be vertically moved upward and downward.

Furthermore, in the present invention, since the left communication path 164 and the right communication path 162 are alternately arranged, the air may move horizontally in the left and right directions, and thus the air movement path may be lengthened.

In particular, in the present invention, the air outlet 124 is introduced from the air outlet 124 disposed below the cam ring 102, and the inlet chamber 152 and the first transfer chamber 156a are in an upper communication path. The communication path of the air can be long because it is communicated by 162.

In the present invention, the air discharge port 132 is discharged to the air discharge port 132 disposed above the cam ring 102, the outlet chamber 154 and the third transfer chamber 156c is a lower communication path. Because of communication by 164, the air movement path can be long.

8 is a diagram showing experimental results comparing the present invention with the prior art. This will be described below with reference to FIG.

In FIG. 8, the "before improvement" of the left side is the noise and vibration generation result according to the prior art, and the "after improvement" of the right side is the noise and vibration generation result according to the prior art.

In the 'before improvement', the noise of about 66.05dB was generated, but in the present invention, the noise of about 63.86dB was generated. Therefore, in the present invention, it can be seen that the noise of about 4 dB is reduced compared to the prior art.

For reference, the vehicle vacuum pumps used in the 'before improvement' and 'after improvement' have only a difference in the specific shape of the above-described pump unit, and the experiments were conducted under the same conditions for the overall size of the cam ring and the rotation speed of the motor shaft. .

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100: pump unit 102: cam ring
120: base plate 130: upper plate
150: chamber 152: inlet chamber
154: exit chamber 156: delivery chamber
160: communication path 162: upper communication path, right communication path
164: lower communication path, left communication path
300: motor unit

Claims (21)

Cam ring;
An upper plate installed at an upper portion of the cam ring; And
And a base plate installed below the cam ring.
The cam ring is provided with a chamber in communication with the air outlet formed in the base plate,
And the chamber is sealed by the upper plate and the base plate. The method of claim 1,
The cam ring is formed with a hollow to accommodate the rotor,
And the chamber is formed in the cam ring to be isolated from the hollow. The method of claim 1,
The pump unit, characterized in that the upper plate is formed with an air discharge port communicating with the chamber. The method of claim 1,
The chamber is a pump unit, characterized in that consisting of a plurality. 5. The method of claim 4,
The pump unit further comprises a communication path for communicating air by communicating with the plurality of chambers. The method of claim 5,
And the communication path includes an upper communication path communicating with an upper side of the chamber, and a lower communication path communicating with a lower side of the chamber. The method according to claim 6,
And the upper communication path and the lower communication path are alternately installed with each other. The method of claim 5,
The communication unit includes a right communication path for communicating the right side of the chamber and a left communication path for communicating the left side of the chamber. 9. The method of claim 8,
And the right communication path and the left communication path are alternately installed. The method of claim 5,
The communication unit is a pump unit, characterized in that the cross-sectional area is smaller than one side of the chamber. A motor unit having a motor for generating a rotational force; And
And a pump unit coupled to the motor unit to generate a vacuum.
The pump unit and the cam ring; An upper plate installed at an upper portion of the cam ring; And a base plate installed below the cam ring.
The cam ring is provided with an inlet chamber communicating with an air outlet formed in the base plate and an outlet chamber communicating with an air outlet formed in the upper plate. 12. The method of claim 11,
The cam ring is formed with a hollow to accommodate the rotor,
And the inlet chamber and the outlet chamber are formed in the cam ring to be isolated from the hollow. 12. The method of claim 11,
And a delivery chamber for delivering air introduced into the inlet chamber to the outlet chamber. The method of claim 13,
The vehicle vacuum pump further comprises an upper communication path for communicating the upper side of the inlet chamber and the transfer chamber. The method of claim 13,
The vehicle vacuum pump further comprises a lower communication path for communicating the lower side of the delivery chamber and the outlet chamber. The method of claim 13,
The vehicle vacuum pump, characterized in that consisting of a plurality of the transfer chamber. 17. The method of claim 16,
The vehicle vacuum pump further comprises a communication path for communicating air by communicating with the plurality of delivery chambers. 18. The method of claim 17,
The communication path includes an upper communication path for communicating an upper side of the delivery chamber and a lower communication path for communicating a lower side of the delivery chamber. 19. The method of claim 18,
A vehicle vacuum pump, wherein the upper communication path and the lower communication path are alternately installed. 18. The method of claim 17,
The communication path includes a right communication path for communicating the right side of the delivery chamber and a left communication path for communicating the left side of the delivery chamber. 21. The method of claim 20,
And the right communication path and the left communication path are alternately installed with each other.

Images