KR100446947B1 - an air compressor - Google Patents

Abstract

PURPOSE: An air compressor is provided to prevent wear and shortening of the life span of a driving gear and a ring leaf spring push rod and to minimize waste of fuel and engine oil. CONSTITUTION: An air compressor comprises a crankshaft(20) movably mounted in a crank chamber(11) of a crankcase(10); a clutch housing(30) axially combined to a horizontal part(21) of the rear of a front end part exposed toward the front of the crankshaft; a ring leaf spring push rod(40) axially combined to a slant part(22) of the middle of the front end part of the crankshaft; a fastening member(40a) fastening to a spiral part of the front of the front end part of the crankshaft to axially fasten the ring leaf spring push rod to the crankshaft; a ring leaf spring(50) mounted between the inside of the clutch housing and the rear of a flange part of the ring leaf spring push rod; a driving gear(60) axially combined to a front end part of the ring leaf sprig push rod; a clutch(70) mounted to a receiving space between the outer peripheral surface side of a shaft tube part of the driving gear and the inner peripheral surface of the clutch housing; a pump piston(91) mounted in a pump chamber(90) orthogonal to the crank chamber; a connecting rod(92) having one end combined to the crankshaft and the other end axially combined to the pump piston; and an air cylinder(80) installed to the rear of the crank chamber to retreat the crankshaft.

Description

Air compressor

The present invention relates to an air compressor for supplying compressed air so that the pressure in the air tank for storing the compressed air provided to the various pneumatic equipment always maintains the set pressure, and more specifically, if the pressure in the air tank exceeds the set value, the compressed air This invention relates to an air compressor in which the supply operation of compressed air is resumed when the supply operation is stopped and the pressure is lower than the set value.

In general, large vehicles such as buses, trucks, or trailers are equipped with pneumatic devices such as an air brake that brakes by using compressed air pressure, or an air open / close device that automatically opens and closes a door. Compressed air is supplied to and stored in an air tank by an air compressor operated by an engine power. To this end, compressed air must be stored in an air tank to maintain an appropriate pressure at all times.

Figure 1 shows an example of a conventional air compressor that performs this operation, the air compressor is a crankcase (1) attached to the engine via a drive gear (3) in which the power of the engine meshes with a timing gear (not shown) When the crankshaft is rotated and the crankshaft is rotated, the piston in the pump chamber 4 is interlocked so that it is supplied to and stored in the compressed air tank 5 through the discharge port 6 '. When the pressure in the air tank is higher than the set pressure and a part of the pressure is transmitted to the unloader 6 through the governor 7, the unloader is operated so that the compressed air is supplied to the air tank. Since the air compressor is operated by air, the unloader is reversed when the pressure decreases as the compressed air stored in the air tank is used, and the compressed air is returned to the air tank. I was in a hurry.

However, even when the compressed air is not supplied to the air tank 5 by the operation of the unloader 6, the air compressor continues to run, and thus the engine power consumption is continued. There is a lot of fuel loss due to idle driving, and thus has a disadvantage in that it greatly reverses the fuel economy of the vehicle.

In addition, as the reciprocating motion of the crankshaft (2) and the piston continues, the internal temperature of the cylinder is increased by frictional heat, and the consumption of engine oil supplied into the crankcase is increased, as well as a large amount of contaminants proportional to the increase in consumption. The high-temperature discharge air contained therein caused pollution to the air and peripheral devices, and caused many problems such as noise generation and abrasion rate to greatly shorten the life of the air compressor.

Therefore, in order to solve these problems, the present applicant, when the pressure in the air tank is higher than the set pressure and the signal pressure is transmitted to the unloader, only the drive gear is idle and the crankshaft and the piston are not operated so that the compressed air is supplied. When the operation is stopped and the pressure is lowered, the crankshaft and the piston are re-operated to invent an air compressor that supplies compressed air, and has been filed in advance (Patent Application No. 2003-101314).

Fig. 2A is a cross-sectional view showing a crank shaft in a reverse state in the above-described invention air compressor, and Fig. 2B is a cross-sectional view showing a state in which the crank shaft is advanced in the air compressor. As described above, the crankshaft 120 mounted in the crankcase 110 is moved backward by the repulsive force of the ring plate spring 150 so that the steel ring plate 171 is interposed between the clutch housing 130 and the drive gear 160. And the friction ring plate 172 are in close contact with each other in the same state as one body, that is, when the engine 100 is operated while the clutch 170 connects the drive gear and the clutch housing, the power is controlled by the timing of the engine. It is transmitted to the crankshaft through the clutch housing via the drive gear and the clutch engaged with the gear (not shown), and rotates the crankshaft, thereby connecting to the connecting rod 192. As the pump piston 191 in the pump chamber 190 reciprocates, the compressed air is discharged through the discharge port 195 to be sent to the air tank 600 for storage, and this operation is continued to supply and store the compressed air. When the pressure of the air is higher than the set pressure, a part of the compressed air is introduced into the air cylinder 180 through the inlet 182 of the cover 181 through the governor 611 as a signal pressure, the incoming signal pressure is crank Since the piston 183 is pushed forward when it is larger than the repulsion force of the ring plate spring 150 which moves the shaft 120 backward, the crank shaft is advanced to push the clutch housing 130 as shown in FIG. As the spring is compressed and the adhesion state of the steel ring plate 171 and the friction ring plate 172 which are in close contact with each other is relaxed and separated from each other, the drive gear 160 and the clutch housing 130 are connected to the clutch 170. When the driving gear is continuously rotated by the power of the engine 100, the rotational force is not transmitted to the crankshaft 120, but only the driving gear is idle.

In this case, since the air compressor is not operated, the supply of the compressed air to the air tank 600 is stopped, the pressure is unnecessarily increased, and the power loss of the engine 100 is prevented, and the consumption of fuel and engine oil is also prevented. Significantly reduced and greatly contribute to improving the fuel efficiency of the vehicle and at the same time, it operates only when necessary, which reduces wear rate and prevents shortening of life, and reduces the frictional heat inside and lowers the temperature of discharged air. Since there is no discharge, the effect of reducing air and surrounding pollution is obtained.

However, the air compressor (patent application No. 2003-30535) of the present invention has been advanced with the axial load generated when the crankshaft is advanced even if only the drive gear 160 is idle when the crankshaft 120 is advanced. Since the repulsive force of the ring plate spring 150 compressed by the clutch housing 130 is applied to the ring plate spring mill 140, the bushing between the drive gear and the ring plate spring mill maintains a strong contact state. Although interposed therebetween, the ground planes are easily worn as friction occurs, which results in shortening the life of the bush as well as the drive gear and the ring plate spring mill, and thus, compared to the air compressor of FIG. Although not very large, there are problems such as power loss, increased fuel and engine oil consumption, and impede fuel efficiency. .

In addition, the thrust bearing 200 is mounted between the inner wall 101 of the engine 100 and the front surface of the drive gear 160 to attenuate the axial load generated when the crankshaft 120 is advanced, but the thrust of the structure In order to secure a space for mounting the bearing, the tubular ring plate spring mill 140 must be formed relatively long, and because there are many objects that are assembled and rotated on the outer periphery of the crankshaft, the ring plate spring mill Assembly work was very difficult and complicated, there was also a problem such that the vibration and noise are greatly generated by a very small error.

The present invention has been invented in view of the above-mentioned problems of the present invention, and an object thereof is to provide an air compressor which minimizes the consumption of fuel and engine oil as well as preventing wear and shortening of the driving gear and the ring plate spring mill. will be.

Another object of the present invention is to provide an air compressor in which the processing and assembling work of the ring leaf spring mill is very simple and easy, and deformation and cracking are not easily generated.

The above object of the present invention, when the pressure in the air tank is higher than the set pressure and the signal pressure is transmitted, the operation of the crankshaft and piston stops the ring plate spring mill when the drive gear is idle in the state of supply of compressed air is stopped. This is accomplished by providing an air compressor that does not generate friction with the crankshaft and generates little axial load during forward movement of the crankshaft.This air compressor delivers the driving force of the drive gear that is rotated in engagement with the timing gear of the engine. The clutch plate housing the transmission and blocking clutch is interposed between the drive gear and the driving gear so that the rotational force of the driving gear is transmitted to the crankshaft through the clutch housing through the ring spring spring mill and the clutch, and the driving gear is idle. Friction with the ring plate spring mill, If the crankshaft moves forward, the air compressor is operated to supply compressed air, and when the crankshaft is reversed, the operation of the air compressor is stopped to stop the supply of compressed air.

1 is a configuration diagram schematically showing an example of a general air compressor

Figure 2a, b is a cross-sectional view showing the operating state of the conventional prior application air compressor

Figure 3 is an exploded perspective view of the air compressor of the present invention

Figure 4a is a cross-sectional view showing a state in which the crankshaft advanced in the air compressor of the present invention

Figure 4b is an enlarged cross-sectional view of the clutch portion in Figure 4a

4C is an enlarged cross-sectional view of the air cylinder portion of FIG. 4A;

FIG. 4D is an enlarged cross-sectional view of the pump piston of FIG. 4A; FIG.

Figure 5a is a cross-sectional view showing a state in which the crank shaft is reversed in the air compressor of the present invention

Figure 5b is an enlarged cross-sectional view of the clutch portion in Figure 5a

Figure 5c is an enlarged cross-sectional view of the air cylinder portion in Figure 5a

Figure 5d is an enlarged cross-sectional view of the pump piston portion in Figure 5a

* Description of the symbols for the main parts of the drawings *

10; Crankcase

11; Crankcase

20; Crankshaft

21; Horizontal section 22; Slope

23; Spiral

30; Clutch housing

31; Axial hole 32; Spline

40; Ring leaf spring mill

41; Tip area 42; Flange

43; Spline

50; Ring leaf spring

60; Drive gear

61; Gear part 62; Tube

63; Spline

70; clutch

71; Steel plate 72; Friction Ring Plate

73; Snap ring

80; Air cylinder

81; Cylinder 82; cover

83; Piston 84; Screw shaft

85; Bearing holder 86; bearing

87; Inlet 88; Coil spring

89; Guide pin 80a; Cylinder chamber

81a; Distribution channel

90; Pump room

91; Pump piston 92; Connecting rod

Hereinafter, described in detail with reference to the accompanying drawings the air compressor according to an embodiment of the present invention.

3 is an exploded perspective view of an air compressor according to an embodiment of the present invention, and FIGS. 4A to 4D and 5A to 5D are cross-sectional views of the crankshaft in the air compressor, respectively.

The crankcase 10 of the air compressor according to the embodiment of the present invention is attached to the engine 100, the crankshaft 20 is rotated in the crank chamber 11 is formed to penetrate horizontally in the lower portion of the crankcase. Is mounted.

The front end of the crankshaft 20 is exposed through the bush 12 coupled to the front end of the crank chamber 11 so as not to be separated by a snap ring, and is positioned inside the engine 100. A cylindrical clutch housing 30 having a shaft hole 31 through which the horizontal portion penetrates is axially coupled to the rear horizontal portion 21 of which the outer peripheral surface is horizontal.

The clutch housing 30 is axially coupled such that the rear side thereof is supported by the front surface of the bush 12, and the spline 32 is formed on the inner circumferential surface, and the front and rear widths of the shaft holes 31 are smaller than the front and rear widths of the horizontal portion 21. Becomes small.

This is for the crankshaft 20 to move forward and backward in the range of the space | interval t by the difference of the front-back width of the axial hole 31 and the horizontal part 21. FIG.

Of the tip portion of the crankshaft 20, the outer circumferential surface of the inclined portion 22 inclined toward the tip side, the inner ring surface of the tube-shaped ring plate spring mill 40 of the inclined surface to match the inclined portion is axially coupled, this The ring plate spring mill is condensed to the inclined portion of the tip portion so as not to be separated by the fastening member 40a which is fastened to the spiral portion 23 of the tip having the spiral formed on the outer circumferential surface.

The fastening member 40a is preferably a nut, and since the inner circumferential surface of the ring plate spring mill 40 is an inclined surface that fits the inclined portion 22, when the fastening members are fastened tightly to each other, the ring plate spring mill has a crank shaft. Will rotate together.

The ring plate spring mill 40 has an inner diameter of the distal end portion 41 of the inner circumferential surface larger than the inner diameter of the rear side so that the fastening member 40a is accommodated in the distal end, and formed at the inner circumferential surface of the clutch housing 30 at the rear end side of the outer circumferential surface. The flange 42 in which the spline 43 which engages the spline 32 at the outer periphery is extended.

When the ring plate spring mill 40 is fixed to the crankshaft 20, a space (a) at a predetermined interval is formed between the rear surface of the flange portion 42 and the inner surface of the clutch housing 30, and a plurality of spaces are formed in the space. The ring plate spring 50 is mounted.

The repulsive force of the ring plate spring 50 mounted as described above pushes the clutch housing 30 backward to closely contact the bush 12 and simultaneously pushes the ring plate spring mill 40 forward to move the crankshaft 20 forward. It works.

On the outer circumferential surface of the distal end side of the ring leaf spring mill 40, a drive gear 60 which is engaged with the distal end portion as an axis and freely rotates separately from the ring leaf spring mill is provided.

The drive gear 60 has a gear portion 61 formed with a gear tooth meshing with a timing gear (not shown) on the engine 100 side at the outer circumference thereof, and has a small diameter extending to the rear side and a spline 63 on the outer circumferential surface thereof. It is formed of the shaft tube portion 62 formed.

Then, between the front and rear end side and the inner circumferential surface of the shaft tube portion 62 and the outer peripheral surface of the tip end side of the ring plate spring mill 40 is provided with a bush (60a) so that they do not come into direct surface contact, the washer on the outer end surface of the tip end side of the ring plate spring mill Engage the 44 and install the snap ring 45 so that the drive gear 60 is not detached.

In addition, the front center portion 64 of the drive gear 60 is formed to be recessed to a predetermined depth so that the tip of the crankshaft 20 is positioned in the center portion so that the front end of the crankcase 10 is exposed from the front of the crankcase 10. Reduce the gap as much as possible.

On the other hand, between the inner circumferential surface of the clutch housing 30 and the outer circumferential surface of the shaft pipe portion 62 of the drive gear 60 due to the difference in the diameter thereof, the accommodation space at the front side of the flange portion 42 of the ring leaf spring mill 40. (b) is formed, and the clutch 70 is mounted in this accommodation space.

The clutch 70 includes a plurality of steel plate 71 formed with a spline coupled to a spline 32 formed on an inner circumferential surface of the clutch housing 30 on an outer circumferential surface of the shaft hole larger than an outer diameter of the shaft tube 62. The diameter of the steel ring plate is smaller than the inner circumference of the shaft hole is composed of a plurality of friction ring plate 72 formed with a spline coupled with the spline 63 formed on the outer circumferential surface of the shaft tube.

The stilling plate 71 and the friction ring plate 72 are alternately mounted one by one, and the axial hole of the stilling plate is isolated from the shaft pipe portion 62 while the spline formed on the outer circumferential surface of the spline of the clutch housing 30. And a spline formed at the shaft hole of the friction ring plate is engaged with the spline 63 of the shaft pipe portion, while the outer circumferential surface is separated from the inner circumferential surface of the clutch housing.

Accordingly, the steel ring plate 71 rotates together with the clutch housing 30 and the friction ring plate 72 rotates together with the drive gear 60. In addition, the steel ring plate and the friction ring plate are the inner circumferential surface of the clutch housing. The rear side is supported by the flange portion 42 of the ring leaf spring mill 40 while being mounted so as not to be separated from the front by the snap ring 73 mounted on the tip side.

The steel ring plate 71 and the friction ring plate 72 of the clutch 70 mounted as described above are moved when the ring plate spring mill 40 and the crankshaft 20 move forward together by the action of the repulsive force of the ring plate spring 50. Since it is pressed between the branch 42 and the snap ring 73 and firmly adhered to each other without any gap, the drive gear 60 and the ring plate spring mill and the clutch housing are connected to one body.

When connected in this way, the rotational force of the drive gear 60 is transmitted to the clutch housing 30 by the clutch 70 and at the same time the ring plate spring through the spline 43 of the flange portion 42 coupled to the spline 32. It is transmitted to the pusher 40 to rotate the crankshaft 20.

On the contrary, when the ring plate spring mill 40 is moved backward with the crank shaft 20 as described below, the ring plate spring 50 is compressed and the steel plate 71 and the friction plate 72 which are in close contact with each other are isolated. The operation of the clutch 70 which transmits the rotational force of the drive gear 60 to the crankshaft is stopped so that only the drive gear is idle, and thus the operation of the air compressor is stopped.

On the other hand, at the rear end side of the crank chamber 11, an air cylinder 80 for moving the crank shaft 20 advanced by the repulsive force of the ring plate spring 50 is provided.

The air cylinder 80 is installed to seal the open rear end of the crank chamber 11, the center of the front is formed with a shaft groove to which the crank shaft 20 is coupled to the shaft 81 and the receiving portion formed in the rear, In the center of the rear end portion of the crankshaft through a cover 82 mounted on the rear surface to seal the open receiving portion of the cylinder, a piston 83 mounted to the receiving portion, and a through hole formed at the center of the cylinder and the piston. A screw shaft 84 to be fastened, a bearing holder 85 which is condensed by the screw shaft so as to be isolated from the rear surface of the piston at a predetermined interval, a bearing 86 interposed between the piston and the support plate, and the cylinder An injection port 87 formed in the cylinder to inject the compressed air signal pressure between the rear surface and the front surface of the piston, and interposed between the rear surface of the cylinder and the front surface of the piston, thereby causing the piston to be shot backwards. It is provided with a coil spring 88 for applying pressure and a guide pin 89 which is screwed to the piston so that an end is inserted into the guide groove formed at the rear of the cylinder, thereby preventing rotation and forward and backward movement of the piston. .

In addition, the cylinder 81 allows the engine oil introduced into the crank chamber 11 to be supplied to the cylinder chamber 80a, and at the same time, the engine oil introduced during the operation of the piston 83 is discharged to prevent pressure resistance. 81a is formed to penetrate the front and rear surfaces.

It is preferable that the outer circumferential surface of the screw shaft 84 is not in contact with the inner circumferential surface of the through hole formed at each center of the cylinder 81 and the piston 83, and for this purpose, a gap due to the difference in diameter is formed between them. Alternatively, the shaft tube portion 85a which extends forwardly the distal end portion of the shaft hole of the screw shaft 84 formed in the center of the bearing holder 85 may be interposed between the outer peripheral surface of the screw shaft and the inner peripheral surface of the through hole.

Of course, even in this case, the outer circumferential surface of the shaft tube portion 85a has a gap therebetween so that the inner circumferential surface of each shaft hole of the cylinder 81 and the piston 83 and the inner circumferential surface of the shaft tube portion are not in contact with the outer circumferential surface of the screw shaft 84. It is desirable to keep this.

This air cylinder 80 is sent through the governor (6b), the signal pressure is the compressed air which is injected between the rear of the cylinder 81 and the front of the piston 83 through the inlet 87, the crankshaft 20 Since the piston is reversed when the repulsive force of the ring plate spring 50 is advanced, the crank shaft, which is coupled to the bearing holder 85 and the screw shaft 84, moves backward together, and at the same time, the ring plate spring mill 40 The ring leaf spring is compressed since it is reversed.

At this time, the degree to which the piston 83 is reversed is proportional to the interval t due to the difference between the front and rear widths of the shaft hole 31 and the rear end portion 21.

In this case, the ring plate spring mill 40, which is in contact with the front end side of the crankshaft 20, is also retracted together, so that the steel ring plate 71 and the friction ring plate 72 of the clutch 70 that are in close contact with each other without a gap therebetween. Since they are isolated from each other and are in a slip state, the drive gear 60 and the clutch housing 30 are blocked by the clutch, and thus the rotational force is not transmitted to the clutch housing even though the drive gear is rotated, so that the ring plate spring The push rod and the crankshaft will not rotate and only the drive gear will idle.

A pump chamber 90 extends upwardly orthogonally to the crank chamber 11 in the crankcase 11, and a pump piston 91 is mounted in the pump chamber.

The pump piston 91 is axially coupled to the other end of the connecting rod 92, one end of which is axially coupled to the horizontal portion 24 of the crankshaft 20, so that the compressed air is reciprocated during rotation of the crankshaft. 6a).

The other end of the connecting rod 92 is inserted into a coupling groove 93 formed in the center of the pump piston 91 to be opened to the crank chamber 11 side, and the inner width r of the coupling groove is shown in FIG. 4D. As described above, the shaft hole 94 is formed to be larger than the front and rear widths f of the connecting rod to cross the middle portion thereof horizontally.

Therefore, when the shaft pin 96 is coupled through the shaft hole formed at the other end of the connecting rod 92 and both ends thereof are fixed to the shaft hole 94, the connecting rod is axially coupled to the shaft pin in its front and rear width (f). ) And horizontally moving forward and backward within the range by the size difference of the inner width (r) of the coupling groove (93).

This is because the pump piston 91 is mounted in the pump chamber 90 to reciprocate vertically while the crankshaft 20 is installed to move forward and backward in the crank chamber 11, so that the crankshaft is This is because the connecting piston 92 must also move forward and backward when moving forward and backward to reciprocate the pump piston in the pump chamber.

The opened upper end of the pump chamber 90 is covered by a head cover 97 having a discharge port 95 through which compressed air generated by the pump piston 91 is discharged and sent to the air tank 6a.

The air compressor according to the embodiment of the present invention configured as described above moves the ring plate spring mill 40 and the crankshaft 20 forward by the repulsive force of the ring plate spring 50 so that the clutch housing 30 and the drive gear 60 are moved. The steel ring plate 71 and the friction ring plate 72 interposed therebetween are in close contact with each other, such as a body, that is, the clutch 70 connects the drive gear and the clutch housing 30 to each other. When the 100 is operated, the power is transmitted to the crankshaft through the clutch housing and the ring plate spring mill via the drive gear and the clutch engaged with the timing gear of the engine to rotate the crankshaft.

In this case, the bearing holder 85 mounted on the rear end of the crankshaft 20 by the screw shaft 84 is rotated together but the piston 83 is not rotated because it is isolated from the screw shaft and the bearing holder. The pump piston 91 in the pump chamber 90 reciprocates by the connecting rod 92, and the compressed air generated in this process is discharged through the discharge port 95 and sent to the air tank 6a and stored.

If this operation is continued and the pressure of the compressed air supplied into the air tank 6a becomes higher than the set pressure, the signal pressure, which is the compressed air, passes through the governor 6b and the cylinder in the air cylinder 80 through the inlet 87. 81 is introduced between the rear of the piston and the front of the piston 83, when the incoming signal pressure is greater than the repulsive force of the ring plate spring 50 for advancing the crankshaft 20, the piston is pushed backward to move backward give.

As such, when the crankshaft 20 is reversed, the ring plate spring mill 40 is retracted together, so that the ring plate spring 50 is compressed, and accordingly, the steel ring plate 71 is in close contact with one body by the repulsive force of the ring plate spring. ) And the friction ring plate 72 is released and insulated from each other, so that the driving gear 60, the clutch housing 30, and the ring plate spring mill are disconnected by the clutch 70.

In addition, when the connection of the clutch 70 is interrupted, even if the drive gear 60 is continuously rotated by the power of the engine 100, the rotational force is not transmitted to the clutch housing 30, so that only the drive gear is idle and the crankshaft is rotated. 20 does not rotate.

Therefore, since the air compressor is not operated, the supply of the compressed air to the air tank 6a is stopped so that the pressure is unnecessarily increased and power loss of the engine 100 is also prevented.

Then, when the compressed air stored in the air tank 6a is used and the pressure is lower than the set value, the signal pressure flowing into the air cylinder 80 through the governor 6b is cut off, and the pressure in the air cylinder is weakened. Accordingly, when the repulsive force of the ring plate spring 50 is greater than the signal pressure, the repulsive force is applied to push the ring plate spring mill 40 forward so that the crankshaft 20 moves forward.

In this case, the steel ring plate 71 and the friction ring plate 72 of the clutch 70 are brought into close contact with each other by the advanced ring plate spring mill 40, so that the drive gear 60 and the clutch housing 30 are It is connected by a clutch, and thus the power of the engine 100 is transmitted to the crankshaft 20 through the clutch housing and the ring leaf spring mill, so that the air compressor is operated to supply the compressed air to the air tank 6b. .

In such a process, the interval between the crankshaft 20 and the connecting rod 92 moving forward and backward may be such that only the close and close contact of the steel ring plate 71 and the friction ring plate 72 of the clutch 70 is released. Therefore, even if the gap is not large and the connecting rod is eccentric from the center line of the pump piston 91, the degree of eccentricity is not large. Therefore, the pump piston always reciprocates normally in the pump chamber 90.

Meanwhile, in the above embodiment, the connecting rod 92 is installed to move forward and backward together with the crankshaft 20 so as to reciprocate the pump piston 91, but is not limited thereto. The connecting rod may be moved forward and backward only without the forward and backward movement.

In order to do this, the length of the horizontal portion 24 to which one end of the connecting rod 92 is axially coupled to the crankshaft 20 is longer than the front and rear width f of the connecting rod so that the horizontal portion is slid. The upper end of the connecting rod may be adhered to the pump piston 91 so as to rotate only without moving forward and backward.

In addition, the connection of the crankshaft 20 and the connecting rod 92 may have a variety of modifications in addition to the above embodiment, but the pump piston for reciprocating the rotational force of the crankshaft 20 is mounted so that the operation forward and backward Of course, if it is intended to deliver to (91) all fall within the scope of the present invention.

In addition, when a large capacity is required to supply compressed air quickly, a plurality of pump chambers 90 may be installed. However, in a vehicle where the amount of compressed air is low, it is preferable to use one pump chamber 90 for cost reduction. In proportion to this, the pump piston 91 and the connecting rod 92 may be installed in a single stage in the pump chamber.

In addition, although the figure in the case where the pump chamber 90 is made into 1 cylinder as mentioned above is not shown in the Example of this invention, it is abbreviate | omitted since it is simply applicable by the said embodiment which consists of 2 cylinders. Even if it falls within the scope of the present invention.

In the air compressor according to the embodiment of the present invention operated as described above, since the crankshaft is moved forward by the repulsive force of the ring plate spring during the supply operation of the compressed air, the axial load applied to the ring plate spring mill and the driving gear is not large. When the supply operation of compressed air is stopped, the crankshaft moves backward to compress the ring plate spring. Therefore, the repulsive force prevents the ring plate spring mill from pushing forward. Therefore, the repulsive force is not applied to the drive gear. Since the drive gear is idling without friction with other parts around it, the overall wear rate is greatly reduced compared to the applicant's previous application, and the prevention of power loss of the engine is maximized, and the consumption of fuel and engine oil is greatly reduced. In addition to improving fuel economy and shortening the lifespan Will contribute.

In addition, the length of the ring plate spring mill is reduced compared to the air compressor of the previous application, which makes the processing and assembly work very simple, and also greatly reduces the distance from the front of the crankcase to the front of the drive gear, and eliminates the thrust bearing. It is also advantageous that the work to be mounted on the device is very simple and easy.

Claims (9)

A crankshaft mounted in the crankcase of the crankcase attached to the engine so as to move forward and backward, the front end of the crankcase penetrating through the crankcase; Clutch shaft is coupled to the horizontal portion of the rear side is the outer peripheral surface of the crankshaft exposed horizontal portion, the spline is formed on the inner peripheral surface, the front and rear width of the shaft hole shaft coupled to the horizontal portion is smaller than the front and rear width of the horizontal portion A housing; An outer circumferential surface of the exposed tip portion of the crankshaft is axially coupled to an inclined portion inclined toward the tip side, and an inner circumferential surface becomes an inclined surface that matches the inclined portion, and a spline of the clutch housing on the outer circumferential edge of the outer circumferential surface thereof. With a tube-shaped ring plate spring mill with an extended splined flange portion formed therein: A fastening member fastened to a helix portion of the distal end portion of which the spiral is formed on an outer circumference of the exposed end portion of the crankshaft, and fastening the ring plate spring mill to an inclined portion to rotate and move forward and backward with the crank shaft; It is mounted between the inner surface of the clutch housing and the rear surface of the flange portion of the ring plate spring mill, and the repulsive force pushes the clutch housing to the rear so that it is fixed in close contact with the front side of the crank chamber and the ring plate spring mill is pushed forward. A ring plate spring for allowing the crankshaft to move forward together; The outer periphery includes a gear portion having a gear tooth engaged with the timing gear on the engine side, and a rear tube portion extending to the rear side, and a shaft pipe portion having a spline formed on the outer circumferential surface thereof. A drive gear rotated separately from the push rod; In the receiving space between the outer peripheral surface side of the shaft pipe portion of the drive gear and the inner peripheral surface of the clutch housing is mounted so that the front and rear sides are supported by the snap ring installed on the tip side of the inner peripheral surface of the clutch housing and the flange portion of the ring plate spring mill. The outer circumferential surface of the shaft pipe portion is larger than the outer diameter of the drive gear and the outer circumferential surface of the plurality of steel ring plate formed with the spline meshing with the spline of the clutch housing, and alternately overlaps with the steel ring plate one by one. A clutch comprising a plurality of friction ring plates formed with a spline meshing with the spline formed at the spline; A pump piston mounted reciprocally in a pump chamber extending perpendicular to the crankcase of the crankcase, the pump piston operative to supply compressed air to an air tank; A connecting rod having one end axially coupled to the crank shaft and the other end axially coupled to the pump piston to reciprocate the pump piston when the crank shaft is rotated; And an air cylinder installed at a rear side of the crank chamber and operated when the pressure of the compressed air stored in the air tank exceeds a set value to move the crank shaft backwards. The method of claim 1, The ring plate spring mill is configured such that the inner diameter of the distal end portion of the inner circumferential surface thereof is larger than the inner diameter of the rear side portion so that the fastening member is accommodated in the distal end portion. The method of claim 1, And a bush interposed between the front and rear ends and the inner circumferential surface of the shaft portion of the drive gear and the outer circumferential surface of the front end portion of the ring leaf spring mill. The method of claim 1, The air cylinder is installed to seal the open rear end of the crank chamber, and a shaft groove is formed in the center of the front of the crank shaft is coupled to the shaft and the receiving portion is formed in the rear, the rear to seal the open receiving portion of the cylinder A cover which is mounted, a piston mounted to the receiving portion, a screw shaft whose end portion is fastened to the center of the rear end portion of the crankshaft through a through hole formed in the center of the cylinder and the piston, and the rear surface of the piston by the screw shaft. And bearing bearings interspersed in isolation at intervals, bearings interposed between the piston and the bearing holders, and injection holes formed in the cylinders to inject signal pressure, which is compressed air, between the rear surface of the cylinder and the front surface of the piston. Air compressor. The method of claim 4, wherein And the screw shaft is smaller than the diameter of the through hole of the screw shaft formed at each center of the cylinder and the piston so as not to be in surface contact with each other. The method of claim 4, wherein Between the rear of the cylinder and the front of the piston, an air compressor characterized in that the preload is applied to the bearing by mounting a coil spring to force the piston to the rear. The method of claim 4, wherein An air compressor, characterized in that between the rear of the cylinder and the front of the piston, a coil spring for mounting the piston to the rear. The method according to claim 4 or 7, A guide groove is formed on the rear surface of the cylinder, and the piston is screwed so that the end portion is inserted into the guide groove, and the air compressor characterized in that the guide pin for guiding the rotation prevention and forward and backward of the piston. The method of claim 4, wherein The cylinder of the air cylinder, the air compressor characterized in that the flow path for preventing the flow of the engine oil and pressure resistance by communicating the crank chamber and the cylinder chamber equipped with the piston is formed.