JPH11107919A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor wherein efficiency is improved in a process of manufacture of a delivery valve of the compressor, and reliability of air- tightness is improved in a delivery flow path where pressure air after compression passes. SOLUTION: This constitution is formed such that in a cylinder head 30 closing a compression chamber A, a delivery flow path 31 is formed, a delivery valve 36 is inserted from a delivery end opening part 32 of the delivery flow path 31, and the valve is opened by moving toward the opening part 32. In this way, a constitution is reduced for mounting a mounting hole provided in the cylinder head in the past and the delivery valve of guide member or the like closing the mounting hole and molding and assembly workability of the cylinder head 30 are facilitated. In mounting of the delivery valve 36, by utilizing the opening part 32 for mounting a pipe, the conventional mounting hole can be eliminated, and air-tightness is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a compressor mounted on an automobile or the like.

[0002]

2. Description of the Related Art FIGS. 2 and 3 show a conventional compressor. The compressor 1 is installed in an engine room of a vehicle for supplying compressed air to an air suspension device that adjusts a vehicle height by supplying and exhausting compressed air to and from a gas spring. The compressor 1 is housed inside the motor case 2 and the motor case 2,
An electric motor (not shown) as a driving source having a crank mechanism 4 connected to the rotating shaft 3 of the electric motor
And a crankcase 5 accommodating the crank mechanism 4
And a piston 6 as air compression means reciprocated by the crank mechanism 4, and a compression chamber A containing the piston 6
And a cylinder head 8 as a head provided to be connected to the cylinder 7.

An air dryer 9 is connected to the cylinder head 8, and a supply destination of compressed air such as an air suspension device is connected through the air dryer 9.

[0004] The motor case 2 is formed in a bottomed cylindrical body having one end closed and the other end opened. An electric motor (not shown) as a driving source having a rotating shaft 3 is provided inside the motor case 2. One end of the rotating shaft 3 projects from the opening side of the motor case 2.

[0005] The crank mechanism 4 includes a balancer section 4a and a crankshaft 4b. One end of the rotating shaft 3 is connected to the center of the crank mechanism 4,
The entire crank mechanism 4 is housed in a crankcase 5.

[0006] One side of the crankcase 5 is connected to the motor case 2, and the other side is closed by a crankcase lid 5a. The upper side of the crankcase 5 is open, and a cylindrical cylinder 7 is connected to this open portion. In this cylinder 7,
A piston 6 that defines the interior as two upper and lower chambers is slidably inserted. The upper end of a connecting rod 10 is connected to the piston 6 via a piston pin 6a, and the lower end of the connecting rod 10 is connected to a crankshaft 4b of the crank mechanism 4.

Air is supplied to the cylinder head 8 by the cylinder 7.
A suction passage 11 for introducing the compressed air into the inside and a discharge passage 12 for discharging the compressed air after compression are formed. Suction channel 11
Is provided with a suction valve 13. An annular ring 1 for preventing the suction valve 13 from coming off is provided on a valve rod portion 13a of the suction valve 13.
7 is provided, and a valve spring 19 for urging the suction valve 13 in the closing direction is provided so as to surround the valve rod portion 13a. Above the suction valve 13, a lid member 21 for sealing a hole 20 for fitting the ring 17 is press-fitted and fixed by a retaining ring 22. The suction valve 13 is formed of a resin (synthetic resin) such as nylon in order to ensure a resistance to the inflow resistance of suction air and the pressure of compressed air after compression.

A discharge valve 14 formed into a cylindrical shape is inserted into the discharge passage 12 through a mounting hole 8a, and a valve guide 15 for slidably guiding the discharge valve 14 from above is screwed into the mounting hole 8a. It is fixed by. The discharge valve 14 is provided with a valve spring 23 that urges the discharge valve 14 in the closing direction so as to surround the discharge valve 14. The discharge valve 14 is formed of heat-resistant rubber. The valve guide 15 is provided with an O-ring 16 for preventing air from leaking from the mounting hole 8a. Then, the mounting portion 8b of the cylinder head 8
Is provided with an air dryer 9. The connecting portion 9a of the air dryer 9 has O for maintaining airtightness.
A ring 24 is provided.

When exhausting compressed air from the air suspension device, the cylinder head 8 accommodates an exhaust valve (not shown) for exhausting compressed air to the outside via the discharge valve chamber 14a after regenerating the air dryer 9. A case 18 is provided.

[0010]

The above-described compressor 1 has a mounting hole 8a for mounting the discharge valve 14 in the discharge flow path 12 having a high pressure, and a mounting portion 8b to which an air dryer for supplying compressed air is mounted. Is provided, it is necessary to prevent the compressed air from leaking at the two locations of the mounting hole 8a and the mounting portion 8b. As a measure to prevent such leakage, an O-ring 1
6 is attached. When assembling the O-ring, a dedicated jig is used to prevent the O-ring 16 from being damaged by the screw portion 15a of the valve guide 15,
At the time of mounting the valve guide 15, it is necessary to control the tightening torque finely, and there is a problem that the assembling process is troublesome.

SUMMARY OF THE INVENTION In view of the above problems, the present invention simplifies the structure of a discharge passage which is high in pressure, improves the efficiency of the manufacturing process of the discharge valve portion, and improves the airtightness in the discharge passage through which compressed air passes. An object of the present invention is to provide a compressor with improved performance.

[0012]

In order to achieve the above object, the present invention provides an air compression means driven by a driving source, a compression chamber whose volume is increased or decreased by the air compression means, and an atmosphere in the compression chamber. A suction flow path with a suction valve for introducing
In a compressor comprising a discharge flow path provided with a discharge valve for discharging compressed air from the compression chamber, the discharge flow path is formed in a head that closes the compression chamber, and compressed in a discharge end opening of the discharge flow path. Forming a mounting portion for attaching a pipe through which air flows, forming the discharge valve into a shape that can be inserted into the discharge channel from a discharge end opening, and moving the discharge valve toward the opening to open the valve. It is characterized by comprising.

With this configuration, the mounting hole for mounting the conventional discharge valve also serves as the opening for mounting the pipe.
The conventional mounting holes can be eliminated, and the manufacturing and assembling steps of the cylinder head can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a compressor according to the present invention will be described in detail with reference to FIG. The same parts as those in the related art are denoted by the same reference numerals, description thereof will be omitted, and different parts will be described.

In FIG. 1, a cylinder head 30 includes
A mounting portion 30b for mounting the air dryer 9, which forms a part of a pipe to a suction flow path 11, a discharge flow path 31, and a compressed air supply destination, is integrally formed.

The discharge passage 31 includes a compression chamber side 31a connected to the compression chamber A, and a discharge side 31b orthogonal to the compression chamber side 31a. This discharge side 31b
Is a circular hole whose diameter increases in four steps toward the discharge end opening 32 to which the air dryer 9 is connected.
The hole in the step forms a valve sliding portion 33, a retaining ring fitting portion 34, and a pipe insertion portion 35. The valve sliding portion 33 is provided with a discharge valve 36 formed of heat-resistant rubber and having a cylindrical shape and an outer diameter slightly smaller than that of the valve sliding portion 33, inserted through the opening 32. The discharge valve 36 is connected to the discharge side 31b.
Abuts on the step portion 37, and the step portion 37 serves as a valve seat. A plurality of grooves 38 are formed on the side surface of the valve sliding portion 33,
A passage through which compressed air flows when the discharge valve 36 is separated from the step portion 37 is formed.

Further, the discharge valve 36 is provided with a valve spring 39 which urges the discharge valve 36 in a closing direction so as to surround the discharge valve 36. A retaining ring 25 serving as a spring receiver for a valve spring 39 and restricting the movement of the discharge valve 36 is press-fitted and fixed to the retaining ring fitting portion 34 through the opening 32.

The mounting portion 30 of the cylinder head 30
A key-shaped groove 40 is formed in b, and the convex portion 9a of the air dryer 9 is hooked and connected to this groove 40. An O-ring 2 for preventing air leakage is provided at the tip 9b of the air dryer 9.
4 is provided and inserted into the pipe insertion portion 35.

The piston 41 shown in FIG. 1 is a locking type piston different from the direct acting type piston shown in the prior art. However, the present invention is not limited to this. There may be.

The compressor according to the present embodiment has the above-described configuration. Next, the operation and effects of the compressor will be described.

The rotational motion of the crank mechanism 4 driven by the rotary shaft 3 of the electric motor is converted into reciprocating motion by the crank mechanism 4 and the connecting rod 10 connected to the crankshaft 4b to drive the piston 41.

Then, the intake valve 13 is opened during an intake stroke in which the piston 41 moves downward from above in the cylinder 7, and air is introduced into the compression chamber A through the intake passage 11. Next, the air compressed by the compression stroke moving from below to above the piston 41 opens the discharge valve 36 through the discharge flow path 31, and discharges the compressed air to the air dryer 9.

In the structure of the conventional compressor, the compressed high-temperature, high-pressure air directly hits the discharge valve 14 from the inside of the compression chamber A, so that the discharge valve 14 is deteriorated and the durability is reduced quickly. In the embodiment, the discharge channel 31 is formed in an L shape in which the compression chamber side 31a and the discharge side 31b are orthogonal to each other,
Because the structure is such that the compressed air does not directly hit the discharge valve 36,
The temperature of the compressed air drops before the pressure reaches the discharge valve 36, which prevents deterioration of the discharge valve 36 and improves durability.

Further, since the discharge valve 36 is mounted using the opening 32 for mounting the pipe, the conventional mounting hole 8 is used.
a can be eliminated and the airtightness can be improved. The operation of using a special jig so as to prevent the O-ring 16 from being damaged by the threaded portion 15a of the valve guide 15 when the valve guide 15 is assembled in the related art, and managing the tightening torque are performed. The assembly process was troublesome,
Since the discharge valve 36 is attached from the attachment portion 30b to the air dryer 9, the valve guide 15 can be omitted, and the number of parts and the number of assembling steps can be reduced. Furthermore, the O-ring 16 may be damaged during the assembly process of the valve guide 15 in the related art.

In this embodiment, since the discharge valve 36 is provided coaxially with the discharge side 31b of the discharge flow path 31,
Discharge valve 36, valve spring 39, retaining ring 25 on discharge side 31b.
Can be assembled by inserting in this order, so that the assembling property is good.

In the present embodiment, the air dryer 9 is used for the pipe. However, for example, a pipe connected directly to the gas spring of the suspension device may be connected. There is no particular limitation to this as long as it is a pipe through which water can flow out.

Further, in this embodiment, the compressor used for adjusting the vehicle height of the air suspension device mounted on the vehicle has been described, but the present invention is not limited to this.

In this embodiment, an electric motor is used as the drive source. However, the present invention is not limited to this.
For example, a drive source such as an engine may be used.

In this embodiment, an example is shown in which the present invention is applied to a reciprocating compressor using an air compression means as a piston, but the invention is not limited to this. May be used for a compressor or the like.

[0030]

As described in detail above, according to the present invention, the discharge valve is mounted from the discharge end opening, so that the mounting hole and the guide member for closing the mounting hole provided in the conventional cylinder head are conventionally provided. The configuration is reduced because the discharge valve is installed,
Molding and assembling of the cylinder head are facilitated. In addition, since the discharge valve is mounted using the opening for mounting the pipe, the conventional mounting hole can be eliminated and the airtightness can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a compressor according to an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional compressor.

FIG. 3 is a view showing a cylinder head part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor A Compression chamber 9 Air dryer 11 Suction passage 13 Suction valve 30 Cylinder head (head) 30b Mounting part 31 Discharge passage 32 Discharge end opening 36 Discharge valve 41 piston

Claims (1)

[Claims] An air compression means driven by a drive source, a compression chamber whose volume is increased or decreased by the air compression means, a suction flow path provided with a suction valve for introducing air into the compression chamber,
In a compressor comprising a discharge flow path provided with a discharge valve for discharging compressed air from the compression chamber, the discharge flow path is formed in a head that closes the compression chamber, and compressed in a discharge end opening of the discharge flow path. Forming a mounting portion for attaching a pipe through which air flows, forming the discharge valve into a shape that can be inserted into the discharge channel from a discharge end opening, and moving the discharge valve toward the opening to open the valve. A compressor characterized by comprising.