JPH0114778Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a reciprocating piston type compressor used in vehicle height adjustment devices of automobiles, etc.

BACKGROUND ART A conventional compressor of this type, for example, as shown in FIG. A piston 3 is inserted, a connecting rod 5 whose one end is fixed to the piston 3 via a piston pin 4, and a crank rotatably supported to the other end of the connecting rod 5 via a crank pin 6. The piston 3 is moved into the cylinder via the connecting rod 15 by the crankshaft 7, which rotates in synchronization with the rotation of the motor 8. Air is sucked into a pump chamber 11 formed in the upper part of the piston 3 through a suction passage 10 formed in the head cover member 9, compressed by the piston 3, and discharged from the discharge passage 12. I try to do that.

Problems to be solved by the invention By the way, in a compressor with such a configuration,
To attach the rotating shaft 14 provided on the rotor 13 that constitutes the motor 8 to the crankshaft 7,
First, an opening 15 at one end of a rotor housing case 15 which also serves as a yoke for the motor 8 housing the rotor 13 therein.
a to the compressor body 1, the crankshaft 7
is fixed so that it does not rotate, insert the tip of a screwdriver or the like into the cut groove 16 provided at one end 14a of the rotating shaft 14, rotate it, and then attach the mounting hole 17 provided in the crankshaft 7. the rotating shaft 14
The other end 14b is tightened and fixed.

However, when the rotating shaft 14 is attached to the crankshaft 7 using such a conventional method, a cut groove is formed in one end 14a of the rotating shaft 14 into which the tip of a tightening tool such as a screwdriver is inserted. 16, etc., had to be formed in advance.
Further, in order to insert the tip of the tightening tool into the cut groove 16, the rotary shaft 1 of the rotor housing case 15 is
An opening 18a and a cap 19 for closing the opening 18a had to be provided on one end 14a side (the bearing part 18 side that rotatably supports the one end 14a) of the opening 18a. Therefore,
Conventional compressors have had problems such as high processing costs and complicated installation work.

Means for Solving the Problems In order to solve the problems of the conventional art, this invention connects one end of the rotating shaft provided on the rotor housed in a hollow rotor housing case to the rotor. With the rotor supported by a bearing provided at the sealed end of the housing case, the other end of the rotating shaft faces into the mounting hole provided on the crankshaft that reciprocates the piston within the cylinder. The other end of the rotary shaft is fastened and fixed to the crankshaft by driving with electricity.

Function This device, which has such a configuration, uses a crankshaft that rotates in synchronization with the rotation of the motor to reciprocate the piston within the cylinder via the connecting rod, and pumps the piston into the pump chamber formed at the top of the piston. It works by compressing the inhaled air with a piston and discharging this compressed air to the outside.

Embodiments Hereinafter, embodiments of this invention will be described based on the drawings.

Note that the same component parts as in the conventional example are given the same reference numerals.

FIG. 1 is a sectional view showing an embodiment of a reciprocating piston type compressor according to this invention.

As shown in FIG. 1, an opening 15a at one end of a hollow rotor housing case 15, which also serves as a yoke for the motor 8, is fixed to the compressor main body 1, and a bearing portion formed at the other end of the hollow rotor housing case 15 is fixed to the compressor body 1. 18 , one end 14 a of a rotating shaft 14 provided on the rotor 13 housed in the rotor housing case 15 is rotatably supported via a bearing member 20 . The other end 14b of the rotating shaft 14 is fastened to a mounting hole 17 provided in a crankshaft 7 that reciprocates the piston 3 within the cylinder 2. The other end 14b of this rotating shaft 14 is also rotatably supported by a bearing member 21 provided on the compressor main body 1 side. On the other end 14b of this rotating shaft 14, a cylindrical commutator 22 is provided.
is integrally attached to the commutator 22, and a contactor 23 is in sliding contact with the surface of the commutator 22. In addition,
In FIG. 1, 24 is a contact holding part that holds the contact 23, and 25 is the rotor housing case 1.
5 is a field fixed to the inner circumferential surface of the rotor 1; 26 is the rotor 1;
A lead wire connecting the armature winding forming part 3 and a large number of commutator pieces forming the commutator 22;
27 and 28 are suction valves and discharge valves.

In the compressor according to the invention having such a configuration, the rotor 13 is housed in the hollow rotor housing case 15, and one end 14a of the rotating shaft 14 provided on the rotor 13 is connected to the rotor. The other end 14b of the rotary shaft 14 faces into the mounting hole 17 provided in the crankshaft 7 while being supported by a bearing 18 provided at the sealed end of the housing case 15. and,
When the rotor 13 is energized and driven with the crankshaft 7 fixed, the other end 14b of the rotating shaft 14 will be screwed into the mounting hole 17, so the other end 14b will be screwed into the mounting hole 17. It can be tightened and fixed to the crankshaft 7. Note that the tightening torque of the other end 14b of the rotating shaft 14 with respect to the crankshaft 7 is appropriately adjusted by the voltage value applied to the rotor 13 and the voltage application time.

According to the compressor of this invention having such a configuration, the other end 14b of the rotating shaft 14 provided thereon can be tightened and fixed to the crankshaft 7 simply by driving the rotor 13 with electricity. Unlike conventional methods, there is no need to machine a cut groove or the like into which the tip of the tightening tool is inserted at one end of the rotating shaft, and an opening into which the tightening tool is inserted is formed on one side of the rotor housing case. There is no need to provide a cap or the like to close the opening. Therefore, processing costs can be reduced, and the other end of the rotating shaft can be fastened and fixed to the crankshaft quickly and easily.

Effects of the invention As is clear from the above explanation, according to this invention, by simply energizing and driving the rotor constituting the motor, the other end of the rotating shaft provided on the rotor can be moved to move the piston back and forth within the cylinder. It can be tightened and fixed to the moving crankshaft. Therefore, there is no need to machine a cut groove or the like into which the tip of the tightening tool is inserted at one end of the rotating shaft, unlike in the past.
There is no need to provide an opening into which the tightening tool is inserted or a cap to close the opening on one side of the rotor housing case. Therefore, processing costs can be reduced, and the other end of the rotating shaft can be fastened and fixed to the crankshaft quickly and easily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a reciprocating piston type compressor according to this invention, and FIG. 2 is a sectional view showing a conventional reciprocating piston type compressor. 1...Compressor body, 2...Cylinder, 3...Piston, 5...Conrod, 7...Crankshaft,
8... Motor, 13... Rotor, 14... Rotating shaft, 14a... One end, 14b... Other end, 15...
Rotor housing case, 15a... One end opening, 17
...Mounting hole, 18...Bearing part.

Claims (1)

[Scope of utility model registration request] A compressor body, a cylinder provided in the compressor body, a piston slidably inserted into the cylinder, a conrod with one end fixed to the piston, and the other end of the conrod rotatable. In a reciprocating piston type compressor equipped with a crankshaft that is pivotally supported by a crankshaft and a motor that rotationally drives the crankshaft, one end of the compressor is fixed to the compressor body and the other end is sealed. A rotor of the motor is housed in a rotor housing case, and one end of a rotating shaft provided on the rotor is supported by a bearing provided at a sealed end of the rotor housing case,
A reciprocating piston type in which the other end of the rotating shaft faces into a mounting hole provided in the crankshaft, and the rotor is energized to drive the other end of the rotating shaft to be tightened and fixed to the crankshaft. compressor.