KR101529088B1 - A vacuum pump for a vechicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vacuum pump for a vehicle, and more particularly, to a vacuum pump for a vehicle, which prevents breakage of a vacuum pump due to overtook when a rotational resistance of a rotor and a vane increases due to viscosity, A vacuum pump is provided.
To this end, the present invention provides a vacuum pump comprising: a vacuum pump housing; A rotor accommodated in the housing and rotated by receiving external power; The rotor is rotatably supported by the rotor. The rotor is rotatably supported by the rotor, and the rotor is rotatably supported by the rotor. And a power transmission control member for transmitting or blocking transmission to the rotor.

Description

Technical Field The present invention relates to a vacuum pump for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vacuum pump for a vehicle, and more particularly, to a vacuum pump for a vehicle, which prevents breakage of a vacuum pump due to overtook when a rotational resistance of a rotor and a vane increases due to viscosity, A vacuum pump is provided.

The vacuum pump generates negative pressure inside the housing by rotation of a rotor and a vane provided in the vacuum pump, and is capable of providing vacuum pressure to a part (for example, a brake booster or the like) It is a kind of part.

As shown in Korean Patent Laid-Open No. 10-2004-0042410, the conventional vacuum pump has a housing in which a space for forming vacuum pressure is formed, a rotor rotatably formed in the housing, And a vane for rotating the inner space of the housing together with the rotor.

The rotor is connected to a camshaft provided in the engine, and rotates by the rotation of the camshaft. The inner space of the housing is partitioned into a plurality of spaces by the rotor and the vane, and the volume of the plurality of spaces partitioned in this manner is varied by the rotation of the rotor and the vane.

The housing is provided with an inflow portion into which air flows and a discharge portion through which air is discharged. Air and oil flow in through the inflow portion due to the rotation of the rotor and the vane, and are discharged to the discharge portion through the chamber inside the housing.

When such a vacuum pump is left at a low temperature (for example, -30 DEG C) for a long time in a state where the vacuum pump is attached to a vehicle, the viscosity of the oil remaining in the vacuum pump increases and the fluidity of the oil decreases.

When the engine is started in this state, the camshaft connected to the engine rotates the rotor, and the oil in the vacuum pump is discharged to the outside by the rotation of the rotor and the vane.

However, since the viscosity of the oil increased due to the low temperature, the rotation resistance of the rotor and the vane is rapidly increased. As a result, overtorque is applied to the rotor, so that internal components including the rotor are damaged .

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to provide an invention capable of preventing breakage of a vacuum pump due to initial rotational resistance and overtook.

To this end, the present invention provides a vacuum pump comprising: a vacuum pump housing; A rotor accommodated in the housing and rotated by receiving external power; The rotor is rotatably supported by the rotor. The rotor is rotatably supported by the rotor, and the rotor is rotatably supported by the rotor. And a power transmission control member for transmitting or blocking transmission to the rotor.

The present invention also provides a vacuum pump comprising: a vacuum pump housing; A rotor accommodated in the housing and rotated by receiving external power; The rotor is rotatably supported by the rotor. The rotor is rotatably supported by the rotor, and the rotor is rotatably supported by the rotor. Wherein the power transmission control member is a member for selectively transmitting or interrupting the rotational power to be transmitted to the rotor in accordance with the magnitude of the rotational resistance of the rotor, And a damper.

According to the present invention, after the vehicle is left in a low temperature state for a long time, it is possible to prevent over torque from being applied to the rotor due to rotational resistance caused by residual oil in the vacuum pump when starting.

That is, when the rotational resistance of the rotor and the vane becomes equal to or higher than a certain level, the power transmission control member blocks the rotational power of the engine cam shaft from being transmitted to the rotor, thereby preventing over torque from being applied to the rotor.

On the other hand, the over-torque may occur not only when the cam rotates in the forward direction but also when the manual transmission vehicle is inevitably pushed back slightly after starting in a state where the manual transmission vehicle is parked uphill under low temperature conditions.

That is, a rotational resistance due to the high viscosity of the oil may be generated in a low-temperature condition under the reverse rotation of the engine, so that an over-torque may be applied to the rotor and the vane. The present invention is also advantageous in that the over-

Accordingly, the accumulation, deformation and breakage of the fatigue applied to the rotor at the time of the initial start-up are prevented, thereby improving the durability of the vacuum pump and extending its service life.

1 is a perspective view of a vacuum pump for a vehicle according to the present invention.
2 is an exploded perspective view of a vacuum pump for a vehicle according to the present invention.
FIG. 3 is a perspective view and an exploded perspective view showing a combination of a rotor and a power transmission control member of a vacuum pump for a vehicle according to the present invention.
4 (a) shows a state in which the groove corresponding portion of the power transmitting member is disposed in the groove of the rotor in the first embodiment of the power transmitting member according to the present invention.
Fig. 4 (b) shows a state in which the groove-corresponding portion of the power transmitting member is disposed in the groove of the rotor in the second embodiment of the power transmitting member according to the present invention.
4 (c) shows a state in which the groove corresponding portion of the power transmitting member is separated from the groove of the rotor in the first embodiment of the power transmitting member according to the present invention.
4 (d) shows a state in which the groove corresponding portion of the power transmitting member is separated from the groove of the rotor in the second embodiment of the power transmitting member according to the present invention.
5 is a perspective view and an exploded perspective view illustrating a power transmitting member according to a third embodiment of the present invention.
6 is a perspective view and an exploded perspective view illustrating a power transmitting member according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a perspective view of a vacuum pump for a vehicle according to the present invention (hereinafter referred to as "vacuum pump"), and Fig. 2 is an exploded perspective view of the vacuum pump.

1 and 2, a vacuum pump 100 according to an embodiment of the present invention includes a housing 110 having a chamber 111 formed therein, a rotor 110 rotatably installed in the housing 110, 120 and a vane 130 which is fitted across the rotor 120.

A slider 135 is provided on both sides of the vane 130. The slider 135 contacts the inner wall of the chamber 111 to rotate the vane 130 when the rotor 120 and the vane 130 are rotated. To be smoothly performed.

A cover 140 for covering the chamber 111 is provided on the upper surface of the housing 110. The cover 141 is coupled to the housing 110 by a fastening member 145 such as a bolt.

The fastening member 145 is inserted through the first fastening hole 141 provided at the rim of the cover 140 and inserted into the second fastening hole 112 provided at the rim of the housing 110.

An upper sealing member 148 for preventing leakage of air is provided between the cover 140 and the upper rim of the housing 110.

An inlet 160 for introducing air into the outer surface of the housing 110 is provided.

The inflow unit 160 includes an inflow pipe 161 provided in the housing 110, a check valve 162 coupled to the inflow pipe 161 to prevent backflow of the inflow air, And a guide hose 163 for guiding the air to the outside.

A discharge unit 170 is provided on the lower surface of the housing 110. The discharge unit 171 includes a discharge hole (not shown) provided at the bottom of the chamber of the housing 110, A valve 172 in the form of a plate valve and a stopper 173 for defining and limiting the opening and closing intervals of the valve 172 are provided.

The valve 172 and the stopper 173 are coupled to the lower surface of the housing 110 by fastening members 174 such as bolts.

A nozzle 175 is provided at a lower portion of the lower portion of the housing 110. The nozzle 175 discharges air or oil in the rotor 120 to the outside, .

That is, the upper portion of the nozzle 175 is inserted into the inner space of the rotor 110 and communicates with the inner space of the rotor.

The rotor 120 is provided with a vane mounting space 121 through which the vane 130 can be inserted. Since air or oil may remain in the vane mounting space 121, And the nozzle 175 is provided for this purpose.

Vane mounting grooves 122 communicating with the vane mounting space 121 are provided on both sides of the rotor 120 so that the vane 130 is inserted across the rotor 120.

A coupler 180 is connected to a lower portion of the rotor 120. The coupler 180 is connected to a camshaft of the engine to transmit the rotational force of the cam shaft to the rotor 120 .

The coupler 180 is an example of an external power transmitting means, but it is not limited thereto, and various power transmitting means such as gears, belts, and friction wheels are also possible. However, since the coupler 180 is widely used in the technical field, it is merely an example of the power transmission means.

The rotor 120 and the coupler 180 are not directly connected to each other but are connected to the power transmission control member 190 for selectively transmitting the rotational force transmitted through the coupler 180 to the rotor 120 Lt; / RTI >

The rotor 120 includes a body portion 123 on which the vane mounting space 121 and the vane mounting groove 122 are formed and an extension portion 125 extending downward from the body portion 123, The power transmission control member 190 is connected to the extension portion 125.

3 (a) and 3 (b), the rotor 120 includes a body portion 123 on which the vane mounting space 121 and the vane mounting groove 122 are formed, And an extension part 125 extending from the first side to the second side.

The diameter of the extension portion 125 is smaller than that of the body portion 123.

A plurality of grooves 126 are formed in the extended portion 125 in the longitudinal direction of the extended portion 125, and the grooves 126 are spaced apart from each other.

It is preferable that a cross section of a portion where the groove 126 is formed is formed like a gear.

A through hole 128 through which the nozzle (see FIG. 1) 175 is inserted is formed at the center of the diameter of the extended portion 125.

Preferably, the power transmission control member 190 is implemented as a hollow boss.

The power transmission control member 190 includes a first connection portion 191 that is fitted around the groove 126 of the extension of the rotor 130 and a second connection portion 191 that extends to one side from the first connection portion 191, (See FIG. 2, 180) are fitted and connected.

It is preferable that the first connection part 191 is formed in a cylindrical shape and the second connection part 192 is provided in the shape of an elongated hole or an ellipse to be inserted into the coupler 180.

The first connection part 191 is formed with a hollow part 193 into which a part of the extended part 125 can be inserted and the hollow part 193 is formed with the groove 126 of the extended part 125, A corresponding structure 194 is formed which is fitted in correspondence with the above-described structure.

The corresponding structure 194 preferably has a strength and elasticity of a certain level or more.

4 (a), the corresponding structures may be formed as mutually connected rings that surround the grooves 126 of the extension portion 123, or may be spaced apart from each other as shown in FIG. 4 (b) And the grooves 126 of the grooves 123 may be formed.

The corresponding structure 194 shown in FIG. 4 (a) includes an extension rib 198 extending inward from the inner circumferential surface of the first connection portion 191 of the power transmission control member 190, Shaped elastically deformed portions 196 and 197 surrounding the groove 126 and its peripheral surface 127 provided in the rotor 120. [

The elastic deforming portions 196 and 197 form a loop while repeating the concavo-convex shape.

The resiliently deformed portion 196.197 includes a groove corresponding portion 196 bent toward the central portion and a surface corresponding portion 197 corresponding to the surface 127 between the groove 126 and the groove 126 .

The groove corresponding portion 196 is disposed in the groove 126 of the extended portion 125 and the surface corresponding portion 197 is positioned on the surface 127 of the extended portion 125, When the viscosity of the oil in the pump becomes a certain value or less and the rotational resistance of the rotor 120 and the vane (see FIG. 2) becomes a certain level or less, the grooves 126 and the grooved portions 196 are engaged Therefore, the power transmitted to the power transmission control member 190 can be transmitted to the rotor 120 by the coupler 180 (see FIG. 2).

However, if the viscosity of the oil increases at a low temperature and the rotational resistance of the rotor 120 and the vane 130 is large, even if the power is transmitted by the coupler 180 and the power transmission control member 190, And the vane 180 are difficult to rotate.

In this case, the groove-corresponding portion 196 may be in an idling state in which the groove-corresponding portion 196 rides over the groove 126 and is positioned on the surface 127 between the groove 126 and the groove 126 as shown in FIG. 4 (c) This can be continued until the rotational resistance becomes a certain level or less.

When the groove corresponding portion 196 is positioned in the groove 126 as the viscosity of the oil is lowered due to the temperature rise of the vehicle due to starting and the rotational resistance is lowered, The rotor 120 can be rotated by transmitting a force to the groove 126 by being inserted into the groove 126. [

On the other hand, as shown in FIG. 4 (b), the second embodiment of the power transmission control member 190 has an intermittent structure that is not ring-shaped and spaced apart from each other as in the first embodiment.

Also in this case, the corresponding structure 294 is provided with the connection rib 298 and the elastic deforming parts 296 and 297 connected thereto, and the elastic deforming parts 296 and 297 are formed by the groove corresponding part 296 and the surface corresponding part 297 And the grooved portion 296 may protrude more inward than the surface corresponding portion 297. [

In this case, when the power transmission between the coupler 180, the power transmission control member 190 and the rotor 120 is normally performed, the groove corresponding portion 196 is fitted into the groove 126 and fixed.

However, if the viscosity of the oil is high and the rotation resistance is present for a long period of time in a low-temperature state, the groove-corresponding portion 196 may be in contact with the groove (126) and moves to its side surface (127).

This idling operation is performed such that the rotational resistance of the rotor 120 and the vane 130 is lower than a certain level, that is, the groove corresponding portion 196 does not exceed the groove 126, Until the level of the coupling state can be maintained.

The configuration of FIG. 5 proposes a configuration different from that shown in FIG. 3 and FIG.

5, the power transmission control member 390 includes bosses 391 and 392, and the bosses 391 and 392 include a first connection portion 391 and the second connection portion 392. [

The first connection portion 391 is provided in the shape of a cylinder having a hollow portion 393 and the second connection portion 392 extends from the first connection portion 391 to one side to be in contact with the coupler It becomes a form of biting.

The configuration of the second connection portion 392 is preferably a thick plate.

The power transmitting member 390 further includes a fluid damper 400 fitted to the hollow portion 393.

One end of the fluid damper 400 is inserted into the hollow portion 393 of the first connection portion 391 and the other end of the fluid damper 400 is inserted into the insertion hole 128 formed in the extension portion 125 of the rotor 120 Loses.

The fluid damper 400 includes substantially cylindrical body portions 401 and 402. The body portion 401 includes a first body portion 430 fitted to the hollow portion 393 of the first connection portion 391, And a second body portion 402 which is fitted in the insertion hole 128 of the extension portion 125 of the rotor 120.

A viscous fluid (not shown) and a blade or gear (not shown) that rotates the space filled with the fluid are provided inside the body portions 401 and 402.

Accordingly, when the blade or gear is connected to the first body portion 401 and the first body portion 401 rotates, if the blade or gear has a rotational force less than a predetermined level, the blade or gear pushes the fluid, It can rotate as the body 402 and transmit the rotational power.

In this case, it is possible that the viscosity of the fluid inside the vacuum pump becomes lower than a certain level and the rotation resistance is relatively small.

However, when the rotational resistance is large, the gears or the blades in the body portions 401 and 402 are rotated in the fluid-filled internal space, but the fluid is not pushed by the blades or gears, do.

In this case, even if the first body part 401 rotates, the second body part 402 does not rotate.

Therefore, the rotor 120 does not rotate even if the power transmission control member 390 rotates.

The above relationship applies equally to the case where the gear or the blade is coupled to the second body portion 402.

On the other hand, a portion of the first body portion 401 is rotatably inserted into the second body portion 402 without a gear or a blade, and a viscous working fluid is received therebetween, The rotational force of the first body part 401 is transmitted to the second body part 402 by the working fluid so that the first body part 401 and the second body part 402 It can rotate together.

However, if the rotor 120 and the vane 130 connected to the second body 402 have a large rotational resistance, even if the first body 401 rotates, the second body 402 may rotate The surface of the first body part 401 inserted into the second body part 402 is slid with respect to the working fluid so that the first body part 401 is not rotated, .

The first body part 401 is provided with a protrusion 411 and the hollow part 393 is formed in the first body part 401. [ A fixing groove 394 into which the protrusion 411 is inserted is provided.

However, the first body portion 401 may have a fixing groove 394, and the hollow portion 393 may have a protrusion 411.

The second body portion 402 is required to be fixedly coupled to the insertion hole 128 in the extension portion 125 of the rotor 120. To this end, 412, and the protruding portion 129 is provided on the inner peripheral surface of the insertion hole 128.

On the contrary, protrusions may be provided on the surface of the second body part 402, and a fixing groove may be provided on the inner circumferential surface of the insertion hole 128.

6 shows a fourth embodiment of the present invention. The third embodiment shown in Fig. 5 differs from the fluid damper in shape and its surrounding structure.

6, the power transmission control member 490 includes bosses 491 and 492, and the bosses 491 and 492 may include a first connection portion 491 and the second connection portion 492. [

The first connection portion 491 is provided in the shape of a cylinder having a hollow portion 493 and the second connection portion 492 extends from the first connection portion 491 to one side to be in contact with the coupler It becomes a form of biting.

It is preferable that the configuration of the second connection portion 492 is in the form of a thick plate.

The power transmitting member 490 may further include a fluid damper 500 that is fitted in the hollow portion 493.

One end of the fluid damper 500 is inserted into the hollow portion 493 of the first connection portion 491 and the other end of the fluid damper 500 is inserted into the insertion hole 128 formed in the extension portion 125 of the rotor 120 Loses.

6 (c), the fluid damper 500 has an outer body portion 501 of a substantially polygonal shape (e.g., a hexagonal shape), and the outer body portion 501 is provided with a rotation member 502 Is inserted.

The inner shape of the insertion hole 128 may be formed to match the outer shape of the outer body 501.

An insertion space 501a is formed in the outer body 501 so that the rotary member 502 can be inserted.

The rotating member 502 includes a first rotating portion 502a accommodated in the insertion space 501a in the form of a viscous working fluid and a second rotating portion 502b connected to the first rotating portion 502a, A second rotation part 502b which is fitted in a hollow part 493 provided inside the first connection part 491 and rotates when the bosses 491 and 492 rotate is provided.

It is preferable that a step is formed in the second rotation part 502b so as to be fitted and fixed to the hollow part 493.

The hollow portion 493 is provided with a fixing groove 494 through which the second rotating portion 502b can be fitted and fixed.

Meanwhile, the fluid damper 500 is provided with a sealing ring 503 for preventing the working fluid in the insertion space 501a from leaking to the outside.

In the case of such a fluid damper 500, when the rotating member 502 rotates when there is a rotational resistance of less than a predetermined standard, the external damper 501 rotates by the force of the working fluid Respectively.

In this case, when the bosses 491 and 492 rotate, the rotational force is transmitted by the fluid damper 500, and the rotor 120 also rotates

However, if the viscosity of the oil in the chamber of the housing increases due to the low-temperature condition or the like, and the rotational resistance becomes a certain level or more, when the rotational force is transmitted, the rotational member 502 rotates in the outer body portion 501 And the outer body portion 501 does not rotate.

This is because the viscous fluid inside the outer body portion 501 does not transmit the rotational force of the rotary member 502 to the outer body portion 501, It is because I exercise.

Therefore, the over torque transmitted from the camshaft can be prevented from being applied to the rotor.

Hereinafter, the operation of the present invention will be described with reference to the accompanying drawings.

When the vacuum pump is located at a low temperature, the viscosity of the internal residual oil becomes high.

When the camshaft rotates and the coupler (see FIG. 2) and the power transmission control member (see FIG. 2) rotate, the rotor (see FIG. 2) The vane (see FIG. 2) 130 becomes difficult to rotate.

Therefore, stress is generated in the extension portion 125 of the rotor 120 due to the torsion phenomenon, and thus overtook is applied.

As shown in FIGS. 4 (a) and 4 (c), when the above-mentioned over-torque is applied when the groove-corresponding portion 196 is located in the groove 126, Is resiliently deformed to move beyond the groove 126 to its side surface 127.

Since the distance from the center to the groove 126 is greater than the distance from the center to the surface 127, when the groove-corresponding portion 196 moves from the groove 126 to the surface 127, the diameter of the elastic deformation portions 196, .

When the power transmission control member 190 further rotates, the groove-corresponding portion 196 moves to the side groove 126 again, and thereafter performs idling, which moves to the surface 127 again.

When the viscosity of the oil is lowered and the rotational resistance is lowered, the grooved portion 196 is positioned in the groove 126 and the groove corresponding portion 196 pushes the groove 126 in the rotational direction, (130) to perform a vacuum pumping operation.

The operation of FIGS. 4 (b) and 4 (d) is similar to that of FIGS. 4 (a) and 4 (c), except that the elastic deformation portions 296 and 297 are separated, Respectively.

In this case, when the groove-corresponding portion 296 is in the groove 126 and moves to the surface 127, the resiliently deformed portions 269 and 297 temporarily move in the radial direction, and the groove-corresponding portion 296 When it is positioned in the groove 126, it moves in the center direction, and such movement is repeated until the rotational resistance of the rotor 120 and the vane 130 becomes a certain level or less.

When the rotational resistance is lowered, the groove corresponding portion 296 is fixed to the groove 126 while pushing the groove 126 to rotate the rotor 120 and the vane (not shown) 130 are rotated to perform a vacuum pumping operation.

5, when the viscosity of the residual oil in the vacuum pump is high, the rotational force transmitted in the direction of the rotor 120 is not transmitted, and only the power transmitting member 390 rotates.

That is, the rotational force of the cam is transmitted to the coupler 180 and the power transmission adjusting member 390, whereby the first connecting portion 391 and the first body portion 401 inserted therein rotate.

However, even if the gear or the blade (not shown) in the fluid damper 400 rotates, the second body portion 402 connected to the rotor 120 does not rotate due to the rotation resistance , The first body portion 401 and the second body portion 402 relatively slide with the working fluid interposed therebetween, so that only the first body portion 401 rotates.

Thereafter, when the residual oil viscosity in the vacuum pump is lowered and the rotation resistance is lowered, the blade or gear in the fluid damper 400 pushes the fluid inside the second damper 400, Thereby rotating the rotor 120 and the vane 130, thereby performing a vacuum pumping operation.

6, if the viscosity of the residual oil in the vacuum pump is high, only the power transmitting member 490, specifically, the bosses 491 and 492 and the rotating member 502 rotate, The outer body portion 501 and the rotor 120 do not rotate.

This is due to the transmission / interruption of the selective torque transmission peculiar to the fluid damper 500, as described above.

However, when the viscosity of the residual oil is lowered and the rotational resistance of the rotor 120 and the vane 130 is lowered, the torque transmission to the rotor 120 and the vane 130 by the power transmission control member 490 It can be smoothly performed.

Those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Therefore, it is to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

120: rotor 123:
125: extension part 126: groove
127: surface 190, 390: power transmitting member
191, 391: first connection part 192, 392: second connection part
194, 294: Corresponding structure 196, 296:
197,297: surface counterparts 198,298: connecting ribs
400, 500: fluid damper 401: first body part
402: second body part 501: outer body part
502: rotating member

Claims (11)

delete A vacuum pump housing;
A rotor accommodated in the housing and rotated by receiving external power;
And a rotor disposed between the rotor and the external power transmission means for selectively transmitting the external power to the rotor to rotate the rotor,
And a power transmission control member selectively transmitting the external power to the rotor or blocking transmission of the external power according to a level of the rotational resistance of the rotor according to external power transmission,
The rotor includes a body portion in which a vane mounting space for mounting a vane is formed,
And an extension extending from the body portion,
A plurality of grooves spaced apart from each other by a predetermined distance are formed on an outer peripheral surface of the extended portion,
Wherein the power transmission control member includes a corresponding structure coupled to the extension and corresponding to the groove so as to be fixed to the groove or to be separated from the groove according to the rotational resistance of the rotor. 3. The method of claim 2,
Wherein the power transmission control member includes a hollow portion into which the extension portion of the rotor is inserted, and the corresponding structure is provided on an inner circumferential surface of the hollow portion,
Wherein the corresponding structure comprises: a groove corresponding portion corresponding to a groove of an extension of the rotor;
And an elastically deformable portion including a surface corresponding portion corresponding to a surface of the extended portion of the rotor adjacent to the groove. The method of claim 3,
Wherein the groove corresponding portion and the surface corresponding portion are continuously interconnected to form a ring shape. The method of claim 3,
Wherein the grooved portion and the surface corresponding portion are formed as a single unit interconnected with each other, the units being spaced apart from each other. 3. The method of claim 2,
The power transmission member includes a first connection portion having the corresponding structure and having a hollow portion into which the extension portion of the rotor is inserted;
And a second connection portion extending from the first connection portion and coupled with the external power transmission means. delete A vacuum pump housing;
A rotor accommodated in the housing and rotated by receiving external power;
A rotor disposed between the rotor and the external power transmitting means for transmitting external power and selectively transmitting the external power to the rotor to rotate the rotor,
And a power transmission control member selectively transmitting the external power to the rotor or blocking transmission of the external power according to a level of the rotational resistance of the rotor according to external power transmission,
Wherein the power transmission control member includes a fluid damper selectively transmitting or blocking a rotational power to be transmitted to the rotor in accordance with a magnitude of a rotational resistance of the rotor,
Wherein the rotor includes a body portion in which a vane is installed, and an extension portion extending from the body portion and a portion of the fluid damper being inserted and fixed,
Wherein the power transmission control member includes a first connection portion into which a portion of the extension portion and a second portion of the fluid damper are inserted, and a second connection portion to which the coupler is connected. 9. The method of claim 8,
The fluid damper includes a first body part inserted and fixed to the first connection part; And a second body part inserted and fixed to an insertion hole of the extension part of the rotor,
Wherein the first body portion and the second body portion are partially inserted into each other,
Wherein the first body portion and the second body portion are configured to be rotated simultaneously or only partially by the working fluid positioned therebetween. 9. The method of claim 8,
Wherein the fluid damper is divided into a portion coupled to the boss constituting the power transmission control member and a portion coupled to the rotor,
When the boss rotates due to the power transmission by the external power transmitting means, only the portion coupled to the boss rotates when the rotational resistance of the rotor is higher than a certain level,
Wherein a portion coupled to the boss and a portion coupled to the rotor simultaneously rotate when the rotational resistance of the rotor is less than a predetermined level to guide the power so that the rotor can rotate. A vacuum pump housing;
A rotor accommodated in the housing and rotated by receiving external power;
A rotor disposed between the rotor and the external power transmitting means for transmitting external power and selectively transmitting the external power to the rotor to rotate the rotor,
And a power transmission control member selectively transmitting the external power to the rotor or blocking transmission of the external power according to a level of the rotational resistance of the rotor according to external power transmission,
Wherein the power transmission control member includes a fluid damper selectively transmitting or blocking a rotational power to be transmitted to the rotor in accordance with a magnitude of a rotational resistance of the rotor,
The power transmission adjustment member includes a boss disposed between the cam and the fluid damper,
Wherein the fluid damper comprises: a rotating member connected to the boss; an outer body coupled to the rotor and having a portion of the rotating member inserted therein; and a fluid damper provided between the rotating member and the outer body, And a working fluid which is delivered to the outer body portion.

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