JPS61277879A - Crank-type power generator - Google Patents

Abstract

PURPOSE:To reduce both size and weight of the captioned generator by dividing an eccentric crank part on the crank shaft into two parts on the crank shaft together with incorporating the intermediate parts of both eccentric crank parts into the cylinder chamber. CONSTITUTION:A crank shaft 42 is driven by an electric motor 1 for speed reduction via an epicyclic gear system 57. This crank shaft 42 is provided with eccentric crank parts 58 and 59, which are divided into two parts with the axial direction. In addition, this crank shaft 42 is inserted into a lateral hole of a working cylinder 45, while the intermediate parts of both eccentric crank parts 58 and 59 are incorporated into a cylinder chamber 52 in such a manner that the side faces of the eccentric crank parts 58 and 59, which face to each other, become a part of the inner cylinder wall of the working cylinder 45 individually. On the other hand, this working cylinder 45 accommodates a plunger 44, which is pivotally supported by a gudgeon pin 46, in such a manner that the plunger 44 can goes into or out of the cylinder 45.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power generator useful as a hydraulic source for various hydraulic units, high-speed, high-force actuators, and other hydraulic presses, screw presses, and the like.

(Prior art) In conventional power generators, kinetic energy is stored by rotating a flywheel using a motor, small pulley, belt, etc., and instantaneous start-up is performed by a clutch installed on the flywheel, which simultaneously releases the energy instantaneously. In addition, when stopping, it was common to use a separately installed brake device to bring the vehicle to a rapid stop. The rotation of the flywheel system is slowed down by a group of gears, causing the crankshaft or eccentric gear to rotate at a low speed. With such a structure, it is possible to use a motor with a capacity of 1/4 to 1/6 compared to the case where a motor is used alone.

(Problems to be Solved by the Invention) The above-mentioned structure has a large external size and weight as a whole, has large component parts and a large number of components, and requires many man-hours to assemble due to the large number of mounting holes.

The gear group in the flywheel rotation system usually has one meshing part for each gear, so a large gear is required in relation to the torque, which increases the kinetic energy of the driven part, and a large amount of thermal energy is generated by the friction of the clutch and brake. It has the disadvantage of being consumed.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a rank-type power generator that has a short distance between the axis of the crankshaft and the tip of the plunger, and is lightweight and compact as a whole.

(Means for Solving the Problems) A crank type power generator according to the present invention includes a flywheel having a rotor core fixed to the case, which has a stator coil fixed to its inner periphery, and is rotatable with respect to an output shaft. and an electric motor having a drive clutch mounted between the flywheel and the output shaft, and further provided with a brake for the output shaft; and the output shaft of the electric motor is connected via a planetary gear reduction mechanism. A crankshaft having eccentric crank parts spaced apart in the axial direction, a cylinder having a lateral hole passing through and whose both sides are pivotally supported by the eccentric crank part via the injection, and a plunger with a hole that enters and exits the cylinder. and a gudgeon pin that pivotally supports the plunger, and the planetary gear reduction mechanism is housed in a concave end of the journal portion of the crankshaft, and the rotation of the crankshaft causes the cylinder chamber to move. The fluid is configured to flow in and out through the plunger and the interior of the gudgeon vial.

(Example) Next, one invention? , Examples will be described with reference to the drawings.

The power generator of the present invention is composed of a single-motion motor serving as a driving part and a crank type pump serving as an operating part. First, the electric motor will be explained.

FIG. 1 is a longitudinal sectional view of an electric motor 1 according to an embodiment of the present invention. A stator coil 4 is fixed to the inner circumference of the motor case 3, and a rotor core 6 is fixed to the outer circumference of a flywheel 5 inside the case and faces the inner side of the stator coil 4. The flywheel 5 is rotatably supported within the case 3 by a bearing 13 and a bearing 19 arranged at the center of the case 3. The flywheel 5 is equipped with a driving clutch and a brake mechanism.

First, this drive clutch will be explained.

A clutch boss 11 is fixed to the inner shaft end of the case of the output shaft 14, and a drive-side cylinder 10 is fixed to the end surface of the flywheel 5 outside the clutch boss. In the illustrated embodiment, a cylinder cover 8 is fixed to the end of the cylinder 10, and the cylinder 10 and the cylinder cover 8 form an annular cylinder chamber. 7 is a hydraulic line connected to this annular cylinder chamber, and 13 is a bearing that pivotally supports the cylinder 10 in the case 3. A driving piston 9 is housed in the annular cylinder chamber, and a friction plate group 12 is disposed between the piston 9 and the flywheel 5 within the cylinder chamber.

Next, the brake mechanism is provided on the shaft side of case 3, opposite to the above-mentioned drive clutch mechanism, but in both case 3
It is within. The end of the motor case on the brake mechanism side is formed into a concave shape so as to surround the output shaft 14, and this concave portion 21 is closed by a case end plate 26. 29 is a bearing between the output shaft 14 and the end plate 26. As will be described later, the concave portion of this case also serves as a brake side cylinder chamber. A brake boss 23 is fixed to the outer periphery of the output shaft 14 within the case concave portion 21, and a quick friction plate group 22 for braking is provided between the brake boss 23 and the inner wall of the concave portion of the case 3.
is installed. A brake-side piston 24 that slides within the concave portion is housed on the axially outer side ′/c of the friction plate group 22, and a brake-side cylinder chamber 30 is formed between the piston 24 and the case 3. A compression spring 25 is installed between the piston 24 and the case end plate 26, so that the brake-side piston 24 is always biased in a direction to press the friction plate group 22. Note that 27 is a bearing mounted between the output shaft 14 and the flywheel 5. 31
is a hydraulic line communicating with the brake side cylinder chamber 30, and this hydraulic pressure moves the piston 24 in a direction away from the friction plate group 22 against the compression spring 25.

With such a configuration, the stator coil 4 is connected to, for example, a three-phase AC RT.
When a rotating magnetic field is generated by the JL flow, ・Rotor core 6
The flywheel 5 rotates at a predetermined number of rotations. While the flywheel is rotating 50 times, the brake side cylinder chamber 30Vc compressed fluid is supplied from the 8 side in FIG. When supplied, while the fluid is under pressure,
The piston 9 in the drive side cylinder chamber moves to the right in the figure and presses the friction plate group 12, thereby transmitting rotational torque from the flywheel 5 to the clutch boss IIVC via the cylinder IO and the friction plate group 12. The output shaft 14 momentarily enters a rotating state.

Then, when the pressure of the supply fluid on the inlet and B sides is released,
The piston 24 of the brake side cylinder 30 is a compression spring 25
The force moves to the left in the figure and presses against the brake side friction plate group 221. As a result, stopping torque is transmitted from the case 3 to the brake boss 23 via the friction plate group 22 while the flywheel 5 remains rotating, and the output shaft 14 is momentarily brought to a stopped state. Various types such as pneumatic, hydraulic, or electromagnetic types can be used as the clutch mechanism and brake mechanism described above, and the motor type and brake type are not limited to the three-phase model motor.

Next, the operating section, ie, the crank pump 2, driven by the above-mentioned electric motor 1 will be explained.

2 is a side sectional view of a power generator according to an embodiment of the present invention, and FIG. 3 is a sectional view taken approximately along line I-1 in FIG. 2. A crankshaft 42 is rotatably supported on the pump frame 41 so as to be aligned on the same axis as the output shaft 14 of the electric motor 1, and this crankshaft 42 has a pair of eccentric crank parts 58, 59 spaced apart in the axial direction. has. Actuating part cylinder 45ba1. A horizontal hole is formed in the head portion of the cylinder chamber 52 feet in the horizontal direction, and the crankshaft 42 is inserted through the horizontal hole. Specifically, the cylinder 45 has the side holes on both sides thereof connected to the crankshaft 42.
Bush 48.6 by eccentric crank part 58.59
It is pivoted via 0. The mutually opposite side surfaces of the eccentric crank parts 58, 59 thus form part of the inner cylinder wall of the cylinder 45. One journal portion 54fd of the crankshaft 42 is formed with a large diameter and has a concave outer end. An internal gear 55 is formed on the inner circumferential wall of this concave end, and a small gear 56 is also fixed to the tip of the output shaft 14 of the electric motor 1, and this portion is accommodated in the concave end of the journal portion 54. ing. The case end plate 26 facing the pump frame of the motor case 3 has a
A plurality of planetary gears 57 that mesh with an internal gear 55 of the journal portion 54 and a small gear 56 at the tip of the output shaft 14 are supported, and with this configuration, the output shaft 14 and the crankshaft 42
is driven via a planetary gear reduction mechanism built into the crankshaft journal portion 54.

A perforated plunger 44 is accommodated in the cylinder chamber 52 of the actuating portion cylinder 45 so as to be able to move in and out.
The proximal end portion of 40 is pivotally supported via a metal 53 by a gudgeon pin 46 having a fluid passage 51 in the center.

The gudgeon pin 46 is fixed to the pump frame 41vc, and its central fluid passage 51 communicates with the cylinder chamber 52'/C through the hole in the plunger 44. In addition, 49 is a packing holder between the cylinder 45 and the plunger 44, and 50
47 is a guide metal interposed between the plunger peripheral portion and the cylinder wall, and 47 is a metal interposed between the crankshaft journal portion and the pump frame 41. An O-ring is also provided between the eccentric crank portion 58, 59 and the horizontal hole of the cylinder 45, and between the gudgeon pin 46 and the plunger 44.
Of course, packing etc. are attached.

Due to the rotational drive of the output shaft 14 of the electric motor 1 mentioned above, and thus the rotational drive of the crankshaft 42, the cylinder 45 performs a crank motion, and the plunger 44 moves against the gudgeon pin 4.
The fluid in the cylinder chamber 52 moves in and out of the cylinder chamber 52 while making a swinging motion around the pin 6, and as a result, the fluid in the cylinder chamber 52 passes through the fluid passage 51 of the gudgeon pin 46 at extremely high speed and high pressure in the direction of arrow C in FIG. Outflow or inflow in the opposite direction.

(Effects of the Invention) According to the power generator of the present invention, the eccentric crank portion serving as the crank pin of the crankshaft is separated into two locations on the crankshaft, and the intermediate portion of both eccentric crank portions is built into the cylinder chamber. .

The tip of the plunger that moves in and out of the cylinder chamber is close to the axis of the crankshaft, which allows the distance between the crankshaft and the gudgeon pin to be significantly shortened without changing the stroke, and the overall height of the power generator is therefore shortened. Therefore, it is easy to install it on the machine body, for example, the hydraulic press crown.

The weight of the drive unit has also been reduced, and the reduction mechanism using a planetary gear mechanism is housed within the large-diameter crankshaft journal of the operating unit, making the overall structure more compact. By attaching a storage type motor, it is possible to easily double the torque without complicating the structure in any way, and a power generator with a high energy saving effect can be obtained. The cylinder and plunger mechanism of the actuating part performs crank motion with the large end of the cylinder supported by a large-diameter eccentric crank, which provides an extremely high-speed, high-power pump function, making it suitable for use as a pump for hydraulic presses. It is also useful as a hydraulic power source for high-speed, high-pressure operation of various hydraulic cylinders, and also as a hydraulic power source for operating a hydraulic motor or rotary actuator at a constant angle at high speed and high pressure.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an electric motor of a power generator according to the present invention, FIG. 2 is a side sectional view of a power generator according to an embodiment of the present invention, and FIG. 3 is taken along line I-1 in FIG. FIG. 1...Electric motor, 2...Crank type pump. 3...Motor case, 5...Flywheel,
14°...output shaft, 41...pump frame,
42...Crankshaft, 44...Plunger. 45...Cylinder, 46...Gudgeon bin,
51...Fluid passage, 58.59...Eccentric crank part. Sub-Agent Patent Attorney Rikichi Someyo Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A flywheel to which a rotor core is fixed is provided rotatably relative to an output shaft in a case having a stator coil fixed to the inner periphery thereof, and a driving clutch is installed between the flywheel and the output shaft. Further, an electric motor is provided with a brake on the output shaft, a crankshaft is connected to the output shaft of the electric motor via a planetary gear reduction mechanism and has an eccentric crank part spaced apart in the axial direction, and a horizontal hole passing through the crankshaft is connected to the output shaft of the electric motor through a planetary gear reduction mechanism. a cylinder having both sides pivotally supported by the eccentric crank part through the horizontal hole, a plunger with a hole that goes in and out of the cylinder, and a gudgeon pin that pivotally supports the plunger in a swingable manner, A crank-type power generator characterized in that fluid in the cylinder chamber flows in and out through the plunger and the gudgeon pin as the crankshaft rotates.