KR100837328B1 - Power transmission apparatus for clutchless compressor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a clutchless compressor, which serves to cushion the power transmission from the driving source to the compressor in a vehicle and to cut off power between the driving source and the compressor when abnormal torque occurs in the compressor. do.

The power transmission device for a clutchless compressor according to the present invention includes a drive side rotating body 100 that rotates by a rotational force transmitted from a driving source, and a compressor drive shaft to be rotatable at the same rotation center as that of the driving side rotating body. A plurality of lip having a driven side rotor having a hub 200 installed in 10) and a release portion 321 for releasing the connection between the hub and the drive side rotation by breaking when the hub of the driven side rotation is overloaded And a spring member 320 and a plurality of support members 350 fixed to the driving side rotating body to contact the free end of the lip spring member to transmit the rotational force of the driving side rotating body to the hub.

Clutchless, Clutchless, Compressor, Compressor Clutch, Power Train, Clutch Pulley

Description

Power transmission device for clutchless compressors {POWER TRANSMISSION APPARATUS FOR CLUTCHLESS COMPRESSOR}

1 is a partial cross-sectional view showing a power transmission device for a conventional clutchless compressor.

2 is a cross-sectional view taken along the line II-II of FIG.

3 is an external perspective view of a power transmission device for a clutchless compressor according to the present invention;

Figure 4 is an exploded perspective view of the power transmission device for a clutchless compressor according to the present invention.

5 is an exploded perspective view showing another embodiment of the clutchless compressor according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ... Drive side rotor 101, 510 ... through hole

200 ... hub 201, 204 ... combined groove

202 ... step 203 ... projection

310 The Body 311 The Projection

320.Lip spring member 321.Release part

322 Fittings 350 Support members

500 Cover 520 Inserting groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a clutchless compressor. In particular, the present invention relates to a power transmission device for a clutchless compressor. A power transmission device for a clutchless compressor.

In general, the cooling system is to maintain a low temperature inside the vehicle by the cycle of refrigerant evaporation, compression, condensation, expansion, evaporator, compressor, condenser, expansion valve is essential to the vehicle to enable such a cooling system. And the compressor is driven by the power transmitted by the belt from the drive source of the vehicle (drive motor in the case of electric vehicles).

One example of a clutchless compressor used in, for example, an electric vehicle is proposed in Japanese Patent Application Laid-open No. Hei 8-121334.

As shown in FIGS. 1 and 2, the compressor is configured to receive power from a drive source such as a drive motor and a housing 20 in which a nose portion 21 protrudes to one side so as to penetrate the drive shaft 10 of the compressor. It is provided with a power transmission device for transmitting to the drive shaft 10 to rotate the drive shaft (10).

The power transmission device has a boss portion (31) rotatably coupled to the nose portion (21) via a bearing (50), and the drive side rotor (30) receives power from a drive source through a belt (40). And a driven side rotor 60 coupled to an end of the drive shaft 10 and having an outer end connected to one side of the drive side rotor 30.

The driving side rotating body 30 is formed with an insertion groove 33 to which the annular connecting substrate 32 is coupled. An annular accommodating groove is formed on one side of the connecting substrate 32, and a plurality of buffer receptors 70 are integrally formed at equal intervals on the inner circumferential surface of the connecting substrate 32. An annular first buffered rubber 73 is installed in the annular accommodating groove of the connecting substrate 32, and an edge portion of the driven side rotating body 60 is bolted to the second buffered rubber 72 by a bolt 90. By being coupled, the rotational force of the driving side rotating body 30 may be transmitted to the driving shaft 10 through the driven side rotating body 60. A break groove 91 is formed at one side of the bolt 90 that connects the second buffer rubber 72 and the driven rotor 60 to the breaker groove 91 when excessive torque is applied to the compressor. The bolt 90 is to be broken.

Looking at the operating state of the clutchless compressor assembled in the above configuration as follows.

When the torque acting on the compressor is within the set value, the rotational force of the drive side rotor 30 received from the drive source is transmitted to the drive shaft 10 of the compressor via the driven side rotor 60 so that the drive shaft 10 rotates. Can be.

When the drive shaft 10 rotates, the first buffer rubber 73 and the buffer receptor 70 are elastically deformed by the torque on the compressor side, and at the same time, the second buffer rubber 72 disposed in each buffer receptor 70 is The shock on the compressor side is alleviated because the elastic deformation acts as a buffer.                         

On the other hand, when a torque greater than or equal to the set value is applied to the compressor, the bolt 90 is caused by stress concentration on the fracture groove 91 of the bolt 90 connecting the driven rotor 60 and the second buffer rubber 72. ) Is eventually broken, and the power transmission path from the drive side rotating body 30 to the drive shaft 10 is broken, thereby preventing damage to the drive source and the compressor.

However, in the conventional power transmission device as described above, the first and second buffer rubbers 73 and 72, which are rubber materials, and the buffer receptor 70, etc., become hard to be damaged over time and are easily broken between members. The play occurs or the elastic force is lowered, causing a problem in that the buffering effect is lowered.

The present invention has been made to solve the above problems, when abnormal torque occurs on the compressor side, the damaged part is completely separated so that the collision noise does not occur without hindering the rotation of the drive-side rotor, the time is It is an object of the present invention to provide a power transmission device for a clutchless compressor that does not lower the shock absorbing effect even if it passes.

In order to achieve the above object, the present invention includes a driving side rotating body that rotates by the rotational force transmitted from the driving source, and a driven side rotating body having a hub coupled to the rotating shaft of the compressor, the driving side rotating body and the In the power transmission device for a clutchless compressor for connecting the hub of the driven side rotor to transfer the rotational force of the drive side rotor to the hub of the driven side rotor,                     

A plurality of lip spring members radially fixed to the hub of the driven side rotating body and having a release portion that breaks when the hub is overloaded; And

And a support member formed on the driving side rotating body and contacting an end of the lip spring member to transfer the rotational force of the driving side rotating body to the hub of the driven side rotating body.

On the surface opposite to the surface facing the drive side rotating body of the hub, a plurality of stepped portions are formed at uniform intervals along the edges, and coupling grooves having one end portion of the lip spring member fitted therebetween are formed between the stepped portions. do.

In addition, the plurality of lip spring members may further include a body having a protrusion fitted between the stepped portions so as to prevent the lip spring member from being separated. In this case, it is preferable that a through hole is formed in the protrusion, and a protrusion coupled to the through hole is further formed between the stepped portions of the hub to correspond to the through hole.

In addition, the free end of the lip spring member in contact with the support member of the driving side rotating body is bent in the rotational direction of the driving side rotating body so that the contact force is improved when contacting the supporting member so that stress is concentrated on the release part. Can be. In addition, the lip spring member is preferably made of a stainless material so that the elastic force is maintained over time.

In addition, it is preferable that a cover coupled to the compressor drive shaft is further provided while covering the hub so that the lip spring member is not separated from the hub.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in Figure 3 and 4, the power transmission device for a clutchless compressor according to the present invention, the drive side rotating body 100 rotates by the rotational force transmitted from the drive source, and the drive side rotating body 100 A driven side rotating body having a hub 200 installed on a drive shaft of a clutchless compressor so as to be rotatable at the same rotating center as that of the rotating center, and the driving side rotating body 100 and the hub 200 are connected to each other. It is provided with a plurality of lip spring member 320 and the support member 350 for transmitting.

The lip spring members 320 may have a release part 321 fixed radially to the hub 200 and broken when an overload occurs in the hub 200.

The support member 350 is in contact with the free end of the lip spring member 320 to drive the rotational force of the driving side rotating body 100 to the hub 200 through the lip spring member 320 It may be fixed to the whole (100).

The driving side rotating body 100 has a bearing 50 on the outer circumference of the nose portion 21 protruding to one side of the compressor housing 20 so that the drive shaft 10 of the compressor as shown in FIG. It is rotatably installed by the interposition of), and is rotated by receiving power from the drive source through the belt 40. And it is preferable that a plurality of through holes 101 are formed at one side of the surface facing the hub 200 so that the support member 350 can be coupled.

The hub 200 coupled to the end of the drive shaft 10 includes a plurality of stepped portions 202 formed at even intervals along the outer edge of the front surface of the sphere (ie, the surface opposite to the surface facing the driving side rotating body 100). ) And a plurality of coupling grooves 201 formed to fix the lip spring member 320 between the stepped portions 202. The coupling grooves 201 may be disposed at uniform intervals so as to correspond to the through-holes 101 of the driving side rotating body 100.

Accordingly, the lip spring member 320 has one end thereof fitted into the coupling groove 201 of the hub 200 and the free end thereof contacts the rotational direction of the driving side rotating body 100 of the support member 350. When the driving side rotating body 100 rotates, the support member 350 pushes the lip spring member 320 in the rotational direction of the driving side rotating body 100, so that the compressor driving shaft 10 is transferred to the hub 200. ) Will rotate.

According to the present invention, the lip spring member 320 is inserted between the step 202 of the hub 200, respectively, a plurality of radially disposed to prevent the separation of the lip spring member 320 from the coupling groove 201 It may further include a body portion 310 having a protrusion 311. In this case, a through hole 312 is formed in the protrusion 311, and a protrusion 203 coupled to the through hole 312 between the stepped portions 202 of the hub 200 in correspondence with the through hole 312. ) Is preferably further formed.

On the other hand, the lip spring member 320 is preferably made of a stainless material so that the elastic force is maintained even after a long time, and when the body portion 310 is applied to be easily coupled to the hub 200 It is preferable to be molded integrally with the body portion (310). That is, in this case, when the lip spring members 320 are coupled to the hub 200, all the lip spring members 320 and the body portion 310 may be combined at a time, thus simplifying the assembly of the power transmission device for the clutchless compressor. There is an advantage to getting lost.

According to the present invention, the release portion 321 formed on each of the lip spring members 320, the lip spring member 320 is elastically deformed while alleviating the impact of the torque transmitted from the drive side rotating body 100 in normal times When a torque greater than a set value occurs in the compressor and the compressor is fixed, the compressor is immediately broken so that the rotational force of the driving side rotating body 100 is not transmitted to the compressor driving shaft 10. Of course, the formation position, number and size of the release portion 321 may be appropriately changed according to the maximum set torque of the compressor, the release portion 321 is at both sides of the middle portion of the lip spring member 320 It is preferable that it consists of this concave form. That is, the cross-sectional area of the portion where the dismantled portion 321 is formed is smaller than the cross-sectional area of the other portions of the lip spring member 320 to lower the shear stress and the bending stress so that the portion can be easily broken when a torque higher than the set value is applied.

In addition, the end of the free end of the lip spring member 320, which is installed to protrude radially from the hub 200 in contact with the support member 350, increases the rigidity of the lip spring member 320 and release portion 321 It is preferable to bend in the direction of rotation of the drive-side rotor 100 so that the furnace load is effectively concentrated.

On the other hand, the power transmission device for a clutchless compressor according to the present invention, the body portion 310 and the spring member 320 is formed so as to cover the hub 200 in order to prevent the departure from the rotation of the hub 200 and A cover 500 coupled to the compressor drive shaft 10 may be further provided. The cover 500 includes a plurality of insertion grooves 520 radially formed to fit the lip spring members 320 on the rear surface thereof, and the hub 200 coupled to the compressor drive shaft 10 at the center thereof. It has a through hole 510 for fitting a bolt. Therefore, since the cover 500 is fixed to the drive shaft 10 together with the hub 200, the body portion 310 and the spring member 320 may be supported so as not to be separated.

On the other hand, Figure 5 shows a power transmission device of a structure further simplified than the power transmission device described above.

That is, in the hub 200 employed in the power transmission device of the present example, the hub 200 includes a plurality of coupling grooves 204 formed by cutting radially in the edge portion thereof, Correspondingly, one end of the lip spring member 320 is bent and formed into a wedge-shaped fitting portion 322 to be fitted and fixed to the coupling groove 204. In this case, the step 202, the projection 203 and the body portion 310 employed in the power transmission device of the above-described example may be excluded, and the rest of the configuration is the same as in the above-described example.

Next, the operation of the power transmission device for the clutchless compressor according to the present invention configured as described above will be described.

First, referring to a process in which the compressor is operated, when the driving source is driven, the driving side rotating body 100 connected with the belt 40 to the driving source is rotated accordingly. The support member 350 fixed to the driving side rotating body 100 pushes the lip spring member 320 coupled to the hub 200 in the rotational direction of the driving side rotating body 100 so that the lip springs 320 are pushed. Since the hub 200 is rotated, and thus the drive shaft 10 of the compressor coupled to the hub 200 is rotated, cooling of the vehicle may be performed by performing a cooling cycle of the vehicle air conditioner.

In the above case, when the torque acting on the compressor is lower than the set value, the normal operating state is shown. As soon as the driver turns on the engine, the driving rotor 100 receives the sudden torque from the power source in the stopped state and rotates. The support member 350 fixed to the driving side rotating body 100 pushes the lip spring member 320 in the rotational direction of the driving side rotating body 100, and the lip spring is pushed by the supporting member 350. The member 320 is elastically deformed instantaneously in the direction of rotation of the drive-side rotor 100. As the lip spring member 320 is elastically deformed, power is suddenly transmitted from the driving source to the compressor, and thus the operating time of the hub 200 is delayed, thus preventing sudden interlocking rotation of the hub 200. Therefore, rapid power transfer from the drive side rotor 100 to the compressor is prevented. Thereafter, while the normal torque is transmitted from the driving source to the driving side rotating body 100, the lip spring member 320 is restored to its original state by its own elastic force and starts to rotate together with the driving side rotating body 100.

This can mitigate a sudden impact from the drive side rotor 100 to the compressor, thereby preventing damage to the compressor due to a rapid change in rotation from the drive source. In addition, the lip spring member 320 is a stainless material, unlike the rubber material that is conventionally employed to harden with time to prevent the phenomenon that the elastic force is lowered.                     

In addition, the cover 500 is bolted to be inserted into the body portion 310 and inserted into the center through hole 510 so that the body portion 310 and the lip spring member 320 which rotate at a high speed are not separated. By fixing the compressor driving shaft 10 by the not shown, the members 310 and 320 may be supported so as not to be separated.

However, when the torque acting on the compressor is greater than or equal to the set value, the lip spring member 320 breaks due to the load concentrated on the release part 321 while leaving the elastic limit value due to the strong impact with the support member 350. At this time, the end of the free end of the lip spring member 320 in contact with the support member 350 can be bent to effectively concentrate the load to the release portion 321. Accordingly, since the rotational force of the driving side rotating body 100 is not transmitted to the compressor driving shaft 10 while the connection between the driving side rotating body 100 and the hub 200 is disconnected, the compressor and the driving source are protected.

In addition, since the broken lip spring member 320 is all removed from the initial position to the outside and is naturally removed, there is no interference with the peripheral parts and noise due to the collision between the remaining parts and the peripheral parts is also prevented.

On the other hand, as another embodiment for simplifying the shape of the hub 200 and the lip spring member 320 according to the present invention, as shown in Figure 5, each coupling groove formed as a translator on the outer peripheral surface of the hub 200 In the power transmission device for the clutchless compressor in which the fitting portions 322 of the lip spring member 320 are respectively fixed to the 204, because of the unobstructed fitting structure of the coupling groove 204 and the fitting portion 322. Due to the centrifugal force of the hub 200 rotating at a high speed, the lip spring member 320 is prevented from being separated outward. Therefore, the body portion 310 employed to prevent the detachment of the lip spring member 320 illustrated in FIG. 4 is excluded, and the coupling groove 201 is fitted to the protrusion 311 of the body portion 310. Since the step 202 and the projections 203 of the hub 200 forming the shape do not have to be formed, the component can be simplified and the manufacturing becomes simple.

According to the power transmission device for a clutchless compressor of the present invention configured as described above, when a torque exceeding a predetermined value occurs on the compressor side, the release force of the lip spring member is broken so that the power transmission path is cut off, thereby causing the rotational force of the driving side rotating body to be reduced. Since it is not transmitted to the compressor drive shaft, the compressor and the drive source are protected.

In addition, since all the lip spring members are integrally attached to the main body, assembly with the hub of the driven side rotating body is easy, and since the lip spring member is made of stainless steel, the elastic force and the shock absorbing effect can be maintained as it is.

Claims (9)

And a driven side rotating body having a driving side rotating body 100 that rotates by the rotational force transmitted from the driving source, and a hub 200 coupled to the rotating shaft of the compressor, wherein the driving side rotating body and the driven side rotating body In the power transmission device for a clutchless compressor for connecting the hub to transfer the rotational force of the drive side rotor to the hub of the driven side rotor, A plurality of lip spring members 320 radially fixed to the hub of the driven side rotating body and having a release portion broken when an overload occurs in the hub; And And a support member (350) formed on the driving side rotating body and contacting an end of the lip spring member to transmit the rotational force of the driving side rotating body to the hub of the driven side rotating body. Power train for lease compressor. The method of claim 1, On the surface opposite to the surface facing the driving side rotating body 100 of the hub 200, a plurality of stepped jaws 202 are formed at uniform intervals along an edge, and the lip spring member 320 is disposed between the stepped jaws. Clutch compressor power transmission device, characterized in that the coupling groove 201 is formed to be fitted to each end of the fixed). The method of claim 2, It characterized in that it further comprises a body portion 310 having a plurality of protrusions 311 fitted between the step 202 to prevent the lip spring member 320 is separated from the coupling groove 201 Power transmission device for clutchless compressor. The method of claim 3 A through hole 312 is formed in the protrusion 311, and a protrusion 203 coupled to the through hole is further formed between the stepped portions of the hub to correspond to the through hole. Delivery device. The method of claim 1, The hub 200 has a coupling groove 204 formed at its edge to be radially truncated, and has one end of the lip spring member 320 corresponding to the pilot structure of the coupling groove. Power transmission device for a clutchless compressor, characterized in that bent to be formed into a recess-type fitting portion 322 to be fitted into the groove. The method according to any one of claims 1 to 5, The lip spring member 320 is a power transmission device for a clutchless compressor, the free end of which is bent in the rotational direction while contacting the rotational direction of the driving side rotating body 100 of the support member 350. . The method of claim 6, The lip spring member 320 is a power transmission device for a clutchless compressor, characterized in that made of a stainless material. The method of claim 6, And a cover (500) coupled to the compressor drive shaft while covering the hub so that the lip spring member is not separated from the hub. The method of claim 8, The cover 500 includes a plurality of insertion grooves 520 radially formed to fit the lip spring members 320 on the rear surface thereof, and a bolt for coupling the hub to the compressor drive shaft 10 at the center thereof. Power transmission device for a clutchless compressor, characterized in that it has a through hole (510).

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