JPS6355302A - Fluid driven motor - Google Patents

Abstract

PURPOSE:To obtain a fluid driven motor with excellent input/output conversion efficiency, small in size, and of high output torque, by fixing an external gear engaging with a rotor to an output shaft eccentrically, and providing each pair of intake and exhaust ports for driving fluid to locate symmetrically at the right and left sides of a rotor housing. CONSTITUTION:Driving fluid is led from the inlet 22 of a side housing 12, and, via a passage selected by a switching plate 19 and a switching shaft 20, flows through either one of driving fluid intake ports 10, 11 provided on the side face of a side housing 12 into a space between a rotor housing 6 and a rotor 15, causing said rotor 15 is rotate clockwise. While in a space next to said space and a space farther next to the next space counting in the direction of rotation, compression is started to discharge the fluid out from exhaust ports 2-4. As a gear shaft which is to output the rotation of the rotor is eccentrically constructed, large rotational moment can be obtained even in a small housing. Reverse rotation can be obtained by switching of fluid passages, while the rotation can be stopped by making the switching shaft 20 comes to a neutral full-stop position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluid-driven motor driven by fluid pressure such as water or air. By adopting a rotary mechanism housed in a rotor housing with a trochoidal curve, and by providing a pair of injection ports and a discharge port for the working fluid that drives the rotary mechanism at symmetrical positions in the peritrochoid space of the rotor housing, normal rotation is achieved. It is particularly suitable for obtaining high output torque by enabling switching between rotation and reverse rotation, and by mounting the gear eccentrically to the output shaft for transmitting the rotation of the rotor to the output shaft.

[Conventional technology]

For a long time, fluid-driven machines that use pneumatic or water pressure as their driving energy source have been known to generate flammable gases and dust because they do not generate sparks or emit exhaust gas that is harmful to the human body. It was widely recognized and used as a safe power machine in semi-enclosed spaces such as mines, underground mining sites such as tunnels, and underground construction sites, where dust is likely to occur and accumulate.

Among these fluid drive machines, various structures have been devised for fluid drive motors for obtaining rotational output, and these have been in practical use for a long time.

The typical structure of these fluid drive motors is as follows:
Forcibly applying external fluid pressure to a rotary pump structure based on an essentially reversible operating mechanism, such as a vane pump, an axial flow pump, or a trochoidal rotation mechanism,
Most of them provided rotational drive output.

[Problem that the invention seeks to solve]

However, the conventional fluid drive motors as described above have the following problems due to their own basic structure.

First of all, in the case of an axial flow turbine motor, which is a reverse use of an axial flow pump, a considerable part of the energy of the fluid passes through the turbine blades without acting on them. Since it is not possible to introduce a recovery structure, the system has no choice but to become a very inefficient device with low input energy conversion efficiency.

Additionally, in devices that incorporate a vane structure or trochoidal rotation mechanism, the input fluid is not counted in the plates until it reaches a predetermined discharge port and is confined in a sealed space, making it possible to obtain a relatively large rotational torque. It can be done, but
It is structurally complex, has a large number of parts, and is prone to failure, and the working fluid is normally supplied and discharged from the outer periphery of the housing that houses the rotor.
They tend to be bulky and cannot be used as power sources for tools and other small power sources.

The present invention solves the above problems and has excellent input/output conversion efficiency.
Another object of the present invention is to realize and provide a fluid drive motor that can produce a large output torque even when manufactured in a small size.

[Means to solve the problem]

The above-mentioned problems can be solved by the fluid-driven motor according to the present invention, which includes a side housing having a shaft hole through which an output shaft with an external gear is inserted in the center, and a side housing with a cross-section of is surrounded by a peritrochoid-shaped inner peripheral surface, and the side surface is sealed by the side housing to form a parallel space, and the rotor housing has an inner envelope shape of the peritrochoid peripheral surface, In a rotary drive mechanism consisting of an equilateral polygonal rotor that is equipped with an internal gear that meshes with the external gear of the output shaft and that rotates eccentrically while keeping each vertex in constant contact with the inner peripheral surface of the rotor housing, the internal gear of the rotor The meshing external gears are mounted eccentrically on the output shaft, and the working fluid injection port that continuously presses and drives multiple sides of the rotor and the working fluid discharge port that releases energy are installed at symmetrical positions on the rotor housing. It is characterized by having a pair of each.

[Action of the invention]

The fluid drive motor according to the present invention allows the fluid to flow through either of two sets of working fluid injection ports and discharge ports that are provided at positions symmetrical to the longitudinal section of the rotary shaft of the rotary drive mechanism that can obtain high output torque. It is possible to easily switch to forward rotation, reverse rotation, or stop by selecting by operating the path changeover and cutoff switch mechanism, or by shutting off both of them [Example] The following is based on the drawings. An embodiment of the present invention will be described.

The fluid drive motor (20-meter type) according to the present invention has an external appearance as shown in FIG. 1, and a structure as shown in FIG. 2.

That is, the basic configuration of the fluid drive motor 1 is as shown in the one-car diagram.
It has a parallel space surrounded by an inner circumferential surface S having a peritrochoid curved cross section, and has two pairs of working fluid discharge ports on the outer circumference, namely, two pairs of working fluid discharge ports 2 and 3 that are always open and a pair of 4 and 5 that are opened and closed according to rotation. Two rotor housings 6.6 are provided, and one side of the rotor housings 6, 6 is sealed, and two external gears 8, 8 are eccentrically mounted in the central shaft hole 7. A first side housing 12, through which an eccentric shaft 9 is inserted, and which is provided with a pair of working fluid injection ports 10 and 11 communicating from the outer periphery to the side surface, is sealed against the other side surface of the rotor housing 6. A second side housing 12' having substantially the same form as the first side housing 12 and without a working fluid injection port, and an internal gear 13 meshing with the external gear 8 of the eccentric shaft 9, Rotates with the three vertices 14, 14, 14 constantly in contact with the peritrochoid curved circumferential surface S of the parallel space inside the rotor housing 6 (
It consists of two rotors 15 and 15 in the shape of an equilateral triangle formed by the inner envelope of a peritrochoid curve (planetary motion).

That is, the combination of the peritrochoidal rotor housing 6 and the equilateral triangular rotor 15 here is based on the so-called Wankel engine jointly developed by Germany's Dr. F. Wankel and NSU, which is well known as a rotary engine for automobiles. The basic structure is adopted.

As shown in FIG. 4(B), the rotor 15 has apex seals 16, 16, and 16 at each of the three vertices 14, 14, and 14, and side seals 1 at the side surfaces.
7.17.17 is installed to ensure sufficient airtightness between the rotor housing 6 and the rotor housing 6. Inside the outer circumferential wall of the rotor housing 6, exhaust ports 2, 3, 4°5 and injection ports 10.11 are provided. Flow path PI leading to the outside, P2゜P3. P
4. P5. P6 is formed.

Also, on the outside of the first side housing 12.

A switching plate 19 that forms a rotary valve structure that controls the injection and discharge of working fluid in accordance with the rotation of the rotor 15, 15 is overlapped with a shield plate 18 that ensures airtightness between the ventilation paths. The switching plate I9 serves to select one of each pair of working fluid discharge ports 4, 5 and working fluid injection ports 10.11, as shown in FIGS. 3(A) to 3(B).
By combining a switch shaft 20, as shown in FIG. It passes through any pair of injection fluid guide holes 19a and 19b or 19c and 19d, and closes any one of discharge fluid guide holes 19e and 19f (whichever is opened is connected to discharge port 19g).
This selects the direction of rotation of the rotor 15.15.

In addition, 21 in the figure is an interhousing that forms a dividing wall when connecting multiple stages of rotors 15, and similarly to the first side housing 12, the working fluid injection ports 10' and 11'
working fluid injection ports 10' and 11' of this interhousing 21, working fluid injection ports 10.11 of the first side housing 12, and discharge ports 2, 3° 4.5 of the rotor housing 6. The holes that appear on the outer surface when forming.

Although not shown, it is hermetically sealed using a separate sealing screw.

22 is a working fluid inlet provided in the first side housing 12, and 23 in FIG. It serves to supply kinetic energy to maintain the rotation of the rotor 15.

Although only one 24 is shown in FIG. 1, a plurality of 24 are actually used, including the first side housing 12, the second side housing 12', the rotor housings 6 and 6. Interhousing 21. This is a connecting screw that connects the switching plate 19 and the shield plate 18 together.

Reference numeral 25 denotes a guide rod for positioning and reinforcing the connection, which is used when the respective parts are integrated by the connection screw 24.

Reference numeral 26 denotes an exterior cylinder that seals the holes that appear on the outer surface when the ventilation holes of the switching plate 19 are formed.

A knob 27 is attached to the switch shaft 20 with screws 28 for manual operation of the switch mechanism.

29 is a fixed gear provided around the shaft hole 7 of the first side housing 12 in order to guide the rotation of the rotor 15 without difficulty; A similar arrangement is also provided around hole 7.

Note that in this embodiment, two rotors 1 are used in order to increase the output and cancel vibrations that occur when the rotors rotate eccentrically.
5 and 15 are arranged approximately axially symmetrically, and if you want to obtain even greater output and lower vibration, you can easily achieve this by connecting the number of rotor housing units corresponding to the required output in series to the output shaft. .

The fluid drive motor according to the present invention is rotationally driven as shown in FIGS. 4(A) to 4(D).

That is, first, in FIG. 4(A), when the working fluid is injected from the injection port (connector part) 22 of the side housing 12, the switching plate 19 and the switch shaft 2 are injected.
0 (in this example, the flow path selected by
) through the pair of injection fluid guide holes 19c and 19d) shown in FIG.
The rotor housing 6 and rotor 15 (having a first circumferential surface 15a, a second circumferential surface 15b, and a third circumferential surface 15c) are ) flows into the first space I between the rotor 1 and acts to expand the volume of the first space I.
Push the first circumferential surface 15a of No. 5 to rotate it to the right in the figure.

At this time, the second space (■) located next to the first space (■) in the rotational direction and the third space (■) located next to this second space (■) start to be compressed, and the second space (■) The fluid in the space ■ is discharged to the outside via the discharge port 2.3, which is always open, via the channels PI and P2, respectively, and the fluid in the third space ■ is discharged to the outside at the same time as the compression starts. The fluid passes through the opened discharge port 4, passes through the flow path P3, and is discharged from the flow path selected by the switching plate 19 and the switch shaft 20 (in this example, the discharge fluid guide hole 19e).

Then, the working fluid injection port 10 is temporarily shut off by the valve action of the rotor 15 itself when the space volume of the first space (2) reaches its maximum as shown in FIG. 4(C). At this time, the second space ■ virtually disappears and a new third space ■′
is formed, and the above-mentioned first space I becomes a new second space.
The space of ■1 becomes.

Next, as shown in FIG. 4(D), the rotor 15, which has once lost its driving force, maintains its rotation by the inertia of the flywheel 23, and the third circumferential surface 15c forms a new first space 1'. receives the driving force of the working fluid.

In this way, the first circumferential surface 15a and the third circumferential surface 1 of the rotor 15
5c, the second circumferential surface 15b, and the first circumferential surface 15a are sequentially driven to maintain rotation.

In addition, when rotating in the opposite direction to this example, Fig. 3 (C)
This can be easily realized by switching the flow path to a combination of the injection fluid guide holes 19a, 19b and the discharge fluid guide hole 19f, as shown in FIG. The shaft 20 may be set to the neutral complete cutoff position.

〔Effect of the invention〕

In the fluid drive motor of the present invention having the above configuration, the gear shaft for extracting the rotation of the rotor to the outside has an eccentric structure.
Even within a relatively small housing, it is now possible to secure a large rotational moment corresponding to the eccentric dimension. Even though a similar rotary engine structure is basically used, there is no need for the compression cycle of the fuel mixture, which is essential in internal combustion engines, so the rotor itself does not have a large load, and the benefits from the working fluid can be obtained. This type of fluid-driven motor has extremely high input/output conversion efficiency, and two pairs of working fluid inlets and outlets are provided, so the flow rate is reduced. By changing the path, the rotor can be easily switched between forward and reverse rotation, and since the working fluid flow path is formed within the outer peripheral wall of the rotor housing, the overall shape is extremely compact, and the outer wall that must be accommodated is Since the inner diameter of the container and the outer diameter of the cup can be secured, it can contribute to the miniaturization of power sources such as high-speed screw tightening devices and winches, which conventionally tended to be large, and is also quiet and reliable. It also has high performance, and when multiple cylinders are connected in series in multiple stages, it is possible to obtain smooth high output with even less vibration.

As described above, the present invention has made it possible to realize a fluid drive motor structure with extremely high output and excellent input/output conversion efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing the entirety of a fluid-driven motor according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a combined state of a rotor and rotor housing, and FIG. 3 is a working fluid flow path switching mechanism. and FIGS. 4(A) to 4(C) are explanatory diagrams of the rotational operation of the rotor. 2.3, 4.5... Working fluid discharge port, 6...
Rotor housing, 7... Shaft hole, 8... External gear, 9... Eccentric shaft, 10
．． 11... Working fluid injection port, 12... Side housing, 15... Apex seal, 16...
...Side seal, 17...Housing plate,
18... Switching plate, 19... Switch shaft, 20... Interhousing, 21.
...Shield plate, 22...Working fluid inlet,
23...Flywheel. PI, P2. P3. P4. P5. P6...
flow path. Patent Applicant GPM Corporation Agent Patent Attorney 1) Toshibe Be, Figure 1, Figure 3 (A) (B) (D) Procedural Amendment 3. Relationship with the case of the person making the amendment Patent applicant address 1-12-15 Koyamadai, Parts Industry Ward, Tokyo Name
Keizo Sato 4, Agent 150 Address 1-20-22-5 Shibuya, Shibuya-ku, Tokyo Date of amendment order September 2, 1988 (shipment date 62.9)
．． 22) 6. Brief explanation of the drawings in the specification subject to amendment Column for the brief explanation of the drawings in the specification: ``4. Brief explanation of the drawings Figure 1 shows a fluid drive system according to an embodiment of the present invention. A schematic explanatory diagram showing the entire motor, Fig. 2 is an explanatory diagram of the combined state of the rotor and rotor housing, Fig. 3 is an explanatory diagram of the switching mechanism of the working fluid flow path, and Figs. 4 (A) to (C) ) is an explanatory view of the rotational operation of the rotor.''[4.Brief explanation of the drawings FIG. The figure is an explanatory diagram of the combined state of the rotor and rotor housing, Figure 3 is an explanatory diagram of the switching mechanism of the working fluid flow path, and Figures 4 (A) to (
D) is an explanatory diagram of the rotational operation of the rotor. ” The description has been corrected.

Claims (2)

[Claims] (1) A parallel space surrounded by a side housing having a shaft hole in the center through which an output shaft with an external gear is inserted, and an inner circumferential surface having a peritrochoid cross section, and whose side surfaces are sealed by the side housing. and an internal gear that meshes with the external gear of the output shaft, the rotor housing having an internal envelope shape of the peritrochoid peripheral surface of the rotor housing, each apex of which is connected to the internal peripheral surface of the rotor housing. In a rotary drive mechanism consisting of an equilateral polygonal rotor that rotates eccentrically while being in constant contact, the external gear that meshes with the internal gear of the rotor is mounted eccentrically on the output shaft, and multiple sides of the rotor are continuously compressed. 1. A fluid-driven motor comprising a pair of working fluid injection ports for driving and a pair of discharge ports for working fluid that releases energy, each pair being provided at symmetrical positions on a rotor housing. (2) A fluid-driven motor according to claim 1, characterized in that a flow path for guiding an injection port and a discharge port of working fluid to the outside is provided inside the outer peripheral wall of the rotor housing.