KR20110012932A - Power transmission device of water pump - Google Patents

Abstract

PURPOSE: A power transmission device for a water pump is provided to cool an engine even if power is not applied by driving an impeller and to enable a water pump to selectively receive power from the engine. CONSTITUTION: A power transmission device for a water pump comprises a pulley(60), a field coil(68), a disc(72), a rotary shaft(56), an elastic member(74), a rivet(76), and a clutch member(80). The pulley is rotated by receiving power from an engine. The field coil is installed inside the pulley and generates a suction magnetic flux. The disc is moved by the suction magnetic flux of the field coil. The rotary shaft is rotated by selectively receiving power from the pulley. An impeller(58) for flowing cooling water is formed in one end of the rotary shaft. The elastic member provides elastic force. The rivet is coupled to the disc. The clutch member is coupled to the rotary shaft through a hub(86).

Description

Power transmission device of water pump

The present invention relates to a water pump, and more particularly, to a power transmission device for a water pump for selectively transmitting the power of the engine in the vehicle for driving the water pump.

The water pump used in the vehicle pressurizes the coolant and delivers it to the engine so that the coolant circulates inside the engine to release heat generated by the engine. Such a water pump is driven by the power of the engine like a compressor of an air conditioning apparatus. In particular, the water pump is driven by receiving the power of the engine as it is without interruption. Therefore, when the engine is driven, it is always operated together to supply the coolant to the engine.

1 is a cross-sectional view showing the configuration of a power transmission device of a conventional compressor. According to this, the housing 2 forming the appearance of the water pump is provided with a pulley installation portion 4 rotatably installed pulley 20 to be described below.

The shaft support hole 6 is formed through the center of the pulley installation portion 4. The shaft support hole 6 is rotatably installed to the rotating shaft (8). The rotary shaft 8 is rotatably supported by a bearing B provided on the outer surface of the pulley mounting portion 4. The bearing (B) is an inner race (b1) seated on the outer surface of the pulley mounting portion (4), an outer race (b2) rotated together with the pulley (20), the inner race (b1) and the outer race a ball b3 positioned between b2).

An impeller 10 is installed at one end of the rotation shaft 8. The impeller 10 is schematically shown in this drawing, but is actually made in a shape that can pressurize the cooling water. The impeller 10 is rotated by receiving power from the rotating shaft 8 and serves to deliver the coolant to the engine by flowing the coolant.

The other end of the rotary shaft 8 is provided with a hub (12). The hub 12 is installed at one end of the rotating shaft 8 corresponding to the opposite side of the impeller 10 and rotates together with the rotating shaft 8.

Next, the pulley 20 is rotatably installed by the bearing (B). The pulley 20 is to receive the power of the engine through the belt, the through-hole formed in the center is inserted into the pulley installation portion 4 is installed. A belt hanger 22 is formed to hang the belt surrounding the edge of the pulley 20.

An installation space 24 is formed in the pulley 20 to open toward the rear, and the field coil assembly 26 is installed in the installation space 24. The field coil 28 is installed inside the field coil assembly 26 to generate magnetic flux. That is, the field coil 28 generates suction magnetic flux that moves the disk 34 to be pulled 20, which will be described below, when power is applied.

The magnetic field slot 30 is installed in front of the installation space 24 to communicate with the outside. The magnetic field slot 30 is formed on one side of the pulley 20, and communicates with the installation space 24 and the outside to serve as a passage for transferring the suction magnetic flux generated in the field coil 28 to the disk 34. Do it.

Meanwhile, the hub 12 is provided with a damper 32 for buffering action. The damper 32 serves to absorb the shock generated during power transmission between the rotating shaft 8 and the pulley 20. To this end, an elastic material such as rubber is provided inside the damper 32.

The damper 32 is installed to be movable to the disk 34 in a position facing the pulley 20. The disk 34 may be installed to the damper 32 to be movable by fasteners such as rivets. The disk 34 is moved in a direction closer to or away from the pulley 20 by the suction flux of the field coil 28.

The dust cover 36 is coupled to the damper 32 by a bolt 38. The dust cover 36 serves to block dust from flowing into the rotary shaft 8, the pulley 20, and the like from the outside. The edge of the dust cover 36 is bent toward the pulley 20 to effectively block the dust.

The power transmission device for water pump according to the prior art having such a configuration is operated as follows.

First, when power is applied to the field coil 28, the field coil 28 generates a suction magnetic flux to move the disk 34 in the direction of the pulley 20. As such, when the disk 34 is moved toward the pulley 20, the rotational force of the disk 34 is transmitted to the rotation shaft 8 through the hub 12.

The rotating shaft 8 received power through the hub 12 is rotated by the power of the engine, and when the rotating shaft 8 is rotated, the impeller 10 is rotated together with the rotating shaft 8. As the impeller 10 is rotated, the impeller 10 pressurizes the cooling water and delivers the cooling water to the engine, and the cooling water flows through the engine to absorb heat generated by the engine and discharge the heat to the outside.

However, the above-described conventional techniques have the following problems.

As described above, in the method of applying power to the field coil 28, there is a problem in that power must be continuously supplied to rotate the impeller 10. In other words, when the engine is driven, the impeller 10 is rotated by receiving power from the rotation shaft 8. At this time, since the power supply is required to rotate the impeller 10, power consumption is increased.

In addition, when the coolant is supplied to the engine at the initial stage of driving of the engine, there is a problem in that it takes a long time to warm up the engine. That is, the cooling water is supplied to the engine at the same time as the driving of the engine and generates heat, so the warm-up time of the engine is increased.

In this way, when the warm-up time of the engine is long, the emission of carbon dioxide due to incomplete combustion is increased, environmental pollution occurs, fuel consumption is increased, and fuel economy is worse, thereby causing a problem of increasing the vehicle maintenance cost.

In addition, the driving of the impeller 10 requires continuous power supply to the field coil 28, so if an abnormality occurs in a device for applying power to the field coil 28, the impeller 10 does not operate normally. There is a problem. If the impeller 10 is not normally operated, the engine is not cooled and a problem occurs that the engine is overheated.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to allow the water pump to selectively receive the power of the engine.

Another object of the present invention is to provide a power pump for a water pump that can operate normally even in the event of an abnormality of the device for applying power to the field coil.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to a feature of the present invention for achieving the above object, the present invention includes a pulley installed in the housing so as to rotate by receiving the power of the engine; A field coil installed inside the pulley and generating suction magnetic flux by applying power; A disk installed to be moved by the magnetic flux of the field coil; A rotating shaft installed in the housing so as to rotate selectively by receiving power from the pulley, and one end of which includes an impeller for flowing cooling water; An elastic member installed on the pulley in a state of being coupled to one surface of the disk, the elastic member providing an elastic force in a direction away from the pulley; A rivet coupled to the disk and having an interlocking groove formed at a front end thereof; It is characterized in that it comprises a clutch member which is coupled to the rotary shaft through a hub and rotates together, the interlocking projection is coupled to the interlocking groove according to whether the field coil is powered.

The clutch member is characterized in that the linkage interlocking plate is provided at regular intervals along the circular trajectory is coupled.

The pulley has a moving space for moving the disk to the front opening is formed, the elastic member is characterized in that it is installed on the outside of the moving space.

The elastic member is a leaf spring coupled to one surface of the disk, characterized in that the edge of the leaf spring is fixed by the pulley caulking.

In the present invention, the disk supported by the elastic member is moved according to the on-off of the power applied to the field coil, the disk is selectively coupled or separated by the clutch member and the field coil rotated integrally with the rotating shaft is transferred to the pulley It selectively transfers engine power to the water pump. Therefore, it is possible to control the power of the engine to the water pump as needed, there is an effect that can minimize the warm-up time of the engine. The shortening of the warm-up time can minimize the generation of carbon dioxide due to incomplete combustion, thereby minimizing environmental pollution.

In addition, the power transmission device according to the present invention is controlled to cool the engine by driving the impeller when no power is applied to the field coil. Therefore, the impeller is normally driven even when no power is applied to the field coil, thereby cooling the engine. As a result, a problem of overheating of the engine due to an abnormality of the field coil can be prevented.

In the present invention, since the impeller is driven when no power is applied to the field coil, power consumption consumed when the field coil is applied to power is reduced.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a power transmission device for a water pump according to the present invention will be described in detail.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of the water pump power transmission device according to the present invention, Figure 3 is an exploded perspective view of the power transmission device for water pump according to the present invention. Hereinafter, for convenience of description, the left direction will be named as front and front sides with reference to FIG. 2, and the right direction will be referred to as rear and rear surfaces.

As shown in these drawings, the appearance of the power transmission device for water pump according to the present invention is formed by the housing 50. In FIG. 2, only a part of the housing 50 is illustrated for convenience. Pulley installation portion 52 is formed to protrude to one side of the outer surface of the housing 50. The pulley installation unit 52 is a portion in which the pulley 60 to be described below is rotatably installed.

The shaft support hole 54 is formed inside the pulley installation part 52. The shaft support hole 54 is formed through the pulley installation portion 52 and the housing 50 in the front and rear, the rotation support shaft 56 is rotatably installed. The rotary shaft 56 is rotated by receiving power from the engine serves to rotate the impeller (58). The impeller 58 is coupled to the rear end of the rotary shaft 56 by pressing or the like, and serves to cool the engine by flowing coolant.

And the rotation shaft 56 is rotatably supported by a bearing (B) provided on the outer surface of the pulley mounting portion (52). The bearing (B) is an inner race (b1) seated on the outer surface of the pulley mounting portion 52, an outer race (b2) rotated together with the pulley (60), the inner race (b1) and the outer race a ball b3 positioned between b2).

On the other hand, the pulley 60 is rotatably installed on the outer surface of the pulley installation unit 52. The pulley 60 receives power of the engine through the belt, and has a disc shape in which a through hole is formed at a center thereof. A belt hanger 62 is formed around the outer edge of the pulley 60 to wind the belt.

An installation space 64 opening to one surface of the pulley 60 is formed, and the field coil assembly 66 is installed in the installation space 64. A field coil 68 is installed inside the field coil assembly 66. The field coil 68 moves suction of the disk 72 to the pulley 60 in the direction of the pulley 60 by applying power. It serves to generate.

Meanwhile, the pulley 60 is provided with a moving space 69 on the opposite side of the installation space 64. The moving space 69 is a space in which the disk 72 to be described below is movably installed.

The pulley 60 is formed with a magnetic field slot 70 for communicating the installation space 64 and the moving space 69. The magnetic field slot 70 is a portion formed to transfer the suction magnetic flux generated in the field coil 68 to the disk 72. A plurality of magnetic slots 70 may be formed at predetermined intervals along a circular trajectory.

In addition, the disk 72 is movable in the moving space 69 of the pulley 60. The disk 72 has a flat ring shape with an approximately center opening. The disk 72 is selectively coupled to the clutch member 80 in accordance with the on-off of the power applied to the field coil 68 serves to interrupt the power of the engine.

That is, when power is applied to the field coil 68, the disk 72 is moved to the pulley 60 by a suction magnetic flux to be separated from the clutch member 80, and the power applied to the field coil 68. When removed, the clutch member 80 is moved to engage with the clutch member 80. As will be described below, the disk 72 is selectively coupled by the clutch member 80 and the rivet 76. In this way, since the power of the engine is interrupted by the disk 72 and the clutch member 80, the warm-up time of the engine can be minimized.

The disk 72 is generally made of a metal material so that the attraction force can be applied by the magnetic force. Of course, the entire disk 72 is not to be made of a metal material, but only a portion corresponding to the magnetic slot 70 may be made of a metal material.

The elastic member 74 is installed so that the edge is fixed to the outside of the moving space 69 of the pulley 60 through the caulking. That is, the elastic member 74 is installed on the leftmost side of the moving space 69 with reference to FIG. The elastic member 74 is coupled to one surface, that is, the front surface of the disk 72. The elastic member 74 provides an elastic force in a direction in which the disk 72 is away from the pulley 60, that is, in a direction in which the disk 72 is closer to the clutch member 80 to be described below. Therefore, when the suction magnetic flux occurs in the field coil 68, the disk 72 is moved toward the pulley 60, wherein the elastic member 74 supports the disk 72 with an elastic force.

In other words, when the disk 72 is moved toward the pulley 60 by the suction magnetic flux, the elastic member 74 is elastically deformed about an edge of the pulley 60. On the other hand, as the elastic member 74, as shown in Figure 2, it is preferable to use a leaf spring. The elastic member 74 may be coupled to the disk 72 by a rivet 76 or to the disk 72 by a caulking method.

A plurality of rivets 76 are coupled to the disk 72. One end of the rivet 76 is coupled to the disk 72 and is formed to protrude forward. A plurality of rivets 76 are coupled at predetermined intervals along a circular trajectory of the disk 72. The front end of the rivet 76 is formed with an interlocking groove 76 'for engaging with the interlocking protrusion 84 to be described below. The interlocking groove 76 ′ has a shape corresponding to the interlocking protrusion 84, and is coupled to the interlocking protrusion 84 so that the disk 72 and the clutch member 80 may rotate together.

Next, the clutch member 80 is coupled to the front end of the rotary shaft 56. The clutch member 80 is coupled to the rotation shaft 56 by a hub 86 to be described below. The clutch member 80 is selectively coupled to the disk 72 in accordance with the on-off of the power applied to the field coil 68 serves to interrupt the power of the engine. The clutch member 80 is preferably made of a material that can be damped to cushion the shock when engaged with the disk 72, for example, rubber, plastic, or the like.

Since the clutch member 80 does not receive power from the pulley 60 when the coupling with the disk 72 is released, the clutch member 80 cuts off the power transmitted to the rotating shaft 56, and is coupled with the disk 72. In this state, the power is received from the pulley 60 to transmit power to the rotating shaft 56 through the hub 86. The clutch member 80 is made by roughly opening the center of the disc and bending the edge portion backward.

And the interlocking plate 82 is coupled to one surface, that is, the rear of the clutch member 80. The interlocking plate 82 is coupled to the clutch member 80 and rotates together with the clutch member 80, and is selectively coupled to the disk 72. To this end, the interlocking plate 82 is provided with a plurality of interlocking protrusions 84. The interlocking protrusions 84 are formed at regular intervals along the circular trajectory of the interlocking plate 82. The interlocking protrusions 84 are formed to be inclined in a circular trajectory direction for the coupling with the interlocking grooves 76 '.

Meanwhile, the hub 86 is coupled to the inner side of the clutch member 80. The hub 86 is coupled to the rotary shaft 56 by press-fitting or the like to allow the clutch member 80 to rotate together with the rotary shaft 56. The hub 86 may be integrally formed with the clutch member 80.

Hereinafter, the operation of the power pump for power pump according to the present invention having the configuration as described above in detail.

When the vehicle is started and the engine is driven, power of the engine is transmitted to the pulley 60 through the belt. At this time, if the disk 72 is not coupled to the clutch member 80 by the rivet 76, the power of the engine is not transmitted to the rotating shaft 56, only the pulley 60 is rotated.

In this case, power is applied to the field coil 68. When power is applied to the field coil 68, the field coil 68 generates suction flux to move the disk 72 toward the pulley 60. That is, the suction magnetic flux of the field coil 68 is moved toward the pulley 60 while overcoming the elastic force of the elastic member 74 by acting on the disk 72. At this time, the disk 72 is moved toward the pulley 60 in the moving space (69).

As such, when the disk 72 is moved toward the pulley 60, the coupling between the rivet 76 and the interlocking protrusion 84 is released, and as a result, the disk 72 is separated from the clutch member 80. Therefore, even though the pulley 60 is rotated by the power of the engine, it is not transmitted to the rotation shaft 56 through the clutch member 80. As a result, in the state in which power is applied to the field coil 68, the rotating shaft 56 and the impeller 58 are not driven, so that the engine is not cooled.

In order to minimize the warm-up time of the engine, cooling of the engine should be minimized. Therefore, in the warm-up step, as described above, the field coil 68 should be powered to control the impeller 58 not to be driven.

Next, to supply the coolant to the engine by driving the impeller 58, power applied to the field coil 68 is removed. When the power applied to the field coil 68 is removed, no suction flux occurs in the field coil 68. Thus, the disk 72 is moved away from the pulley 60. That is, the disk 72 is moved away from the pulley 60 in the moving space 69 by the elastic force of the elastic member 74 is coupled.

As such, when the disk 72 is moved, the interlocking groove 76 ′ of the rivet 76 is engaged with the interlocking protrusion 84. Then, the clutch member 80 is coupled to the disk 72 and the rivet 76 to rotate together. Therefore, the power of the engine transmitted to the pulley 60 is transmitted to the rotating shaft 56 via the disk 72 and the clutch member 80. That is, the rotation shaft 56 is rotated together with the clutch member 80 coupled through the hub 86.

As the rotary shaft 56 is rotated, the impeller 58 coupled to one end is also rotated together with the rotary shaft 56. The impeller 58 agitates the coolant to transfer the coolant to the engine, and absorbs the heat generated by the engine to cool the engine.

In this state, when the engine is cooled to some extent and the need for cooling is eliminated, power may be applied to the field coil 68 again. That is, the disk 72 is moved toward the pulley 60 due to the power applied to the field coil 68 to release the coupling with the clutch member 80. Therefore, the rotary shaft 56 is not rotated by the power of the engine so that the impeller 58 is not driven.

According to the power transmission device described above, since the impeller 58 is driven to cool the engine only when power is not applied to the field coil 68, the engine may be operated even when an abnormality occurs in the field coil 68. There is no problem with cooling. For reference, a failure of an apparatus for applying power to the field coil 68 may be quickly restored to be sensed through a separate sensing device.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

1 is a cross-sectional view showing the configuration of a power transmission device for water pump according to the prior art.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of the power transmission device for water pump according to the present invention.

Figure 3 is an exploded perspective view of the power transmission device for water pump according to the present invention.

Explanation of symbols on the main parts of the drawings

50 housing 52 pulley mounting portion

54: shaft support hole 56: rotation axis

58 impeller 60 pulley

62: belt hanger 64: installation space

66: field coil assembly 68: field coil

69: moving space 70: magnetic slot

72: disk 74: elastic member

76: rivet 76 ': interlocking groove

80: clutch member 82: interlocking plate

84: interlocking protrusion 86: hub

Claims (4)

A pulley 60 installed in the housing 50 to rotate by receiving power of the engine; A field coil (68) installed inside the pulley (60) and generating suction magnetic flux by application of power; A disk 72 installed to be moved by the suction magnetic flux of the field coil 68; A rotating shaft 56 installed in the housing 50 to be selectively rotated by receiving power from the pulley 60 and having an impeller 58 for flowing coolant at one end thereof; An elastic member (74) installed in the pulley (60) in a state coupled to one surface of the disk (72), and providing an elastic force in a direction away from the pulley (60); A rivet 76 coupled to the disk 72 and having an interlocking groove 76 'formed at the front end thereof; The clutch member is coupled to the rotating shaft 56 through the hub 86 and rotated together, and the interlocking protrusion 84 is coupled to the interlocking groove 76 'according to whether the power supply of the field coil 68 is applied. Power transmission device for a water pump, characterized in that it comprises a (80). The method of claim 1, The clutch member (80) is a power transmission device for a water pump, characterized in that the interlocking projection (84) is coupled to the interlocking plate (82) provided at regular intervals along a circular trajectory. The method of claim 2, The pulley 60 is formed with a moving space 69 for moving the disk 72 to the front opening, the elastic member 74 is characterized in that the water is installed on the outside of the moving space 69 Power train for pumps. 4. The method according to any one of claims 1 to 3, The elastic member (74) is a leaf spring coupled to one surface of the disk (72), the power transmission device for water pump, characterized in that the edge of the leaf spring is fixed to the pulley (60) by caulking.

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