JPH0333882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure medium distribution device, and more particularly to a pressure medium distribution device suitable for a motor that generates rotational motion using a pressure medium.

[Conventional technology]

Conventionally, various types of motors have been known that generate rotational motion using a pressure medium, and some of these motors sequentially supply a pressure medium such as compressed air to a plurality of inflatable bag-like members. , there is one that generates rotational motion by utilizing the expansion force of a bag-like member. Such a motor requires a device for distributing and supplying pressure medium to each bag-shaped member in a sequentially staggered manner.

The present inventor developed a motor in which a plurality of inflatable bag-like members are arranged in parallel around a crank provided on a rotating shaft as described later, and the crank and eventually the rotating shaft are rotated by the expansion force of the bag-like members. However, there is currently no pressure medium distribution device suitable for this motor.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above circumstances, and its object is to provide a pressure medium distribution device suitable for the motor having the above configuration.

Another object of the present invention is to provide a pressure medium distribution device which has a simple structure and allows the setting of the distribution state of the pressure medium to be easily changed.

[Means for solving problems]

In order to achieve the above object, the present invention takes the following technical measures.

That is, the present invention includes a casing 31 and a through hole 3 fixedly installed inside the casing 31.
7 and a sliding surface 32 perpendicular to the through hole 37
The shaft portion 33a is inserted into the through hole 37 of the base 32, and the side surface of the main body portion 33b on the base 32 side is inserted into the base 32. a rotor 33 that rotates while being in contact with the sliding surface 32a;
The sliding surface 34a has a pressure medium supply port 46 and a discharge port 47, and the sliding surface 34a has a pressure medium supply port 46 and a discharge port 47.
and a rotor presser 34 which is pressed and held in contact with the side surface of the main body portion 33b opposite to the base 32.

The base 32 has a plurality of grooves 39a, 39b, and 39c formed on its sliding surface 32a at symmetrical positions around the axis of the through hole 37, which communicate with the plurality of pressure medium supply and discharge holes 38a, 38b, and 38c, respectively. are doing.

The main body portion 33b of the rotor 33 has a shaft portion 33a.
A pair of through holes 42a are located symmetrically with respect to the axis of the
42b, and a pair of depressions 43a, 43b on the side opposite to the base 32. The pair of through holes 42a and 42b are formed in each groove 39 of the base 32 as the rotor 33 rotates.
It is located at such a position that it moves above a, 39b, and 39c.

The rotor presser 34 is connected to the supply port 46
and a pair of communication holes 44 and 45 that communicate with the discharge port 47, respectively. The pair of communication holes 4
4 and 45 are a pair of recesses 4 of the rotor 33, respectively.
A pair of through holes 42a, 42b via 3a, 43b
are connected to each other.

[Effect]

The pair of through holes 42a, 42b of the rotor 33 are connected to the plurality of grooves 39a, 39b, 3 of the base 32.
9c, when the rotor 33 rotates once, each through hole 42a, 42b communicates with a plurality of grooves 39a, 39b, 39c in order in the circumferential direction. Further, the pair of communication holes 44 and 45 of the rotor presser 34 communicate with the supply port 46 and the discharge port 47, respectively, on the one hand, and communicate with the pair of through holes 42a, 42b, respectively, via the recesses 43a, 43b, on the other hand. ing.
Therefore, one of the pair of through holes 42a and 42b serves as a passage for supplying the pressure medium, and the other serves as a passage for discharging the pressure medium.

Therefore, when the rotor 33 rotates once, both the through holes 4
The pressure medium can be sequentially supplied to the grooves 39a, 39b, 39c of the base 32 through one of the grooves 2a, 42b, as well as the pressure medium supply/discharge holes 38a, 38b, 38c, and at the same time be discharged sequentially through the other. can.

〔Example〕

Embodiments of the present invention will be described below based on the accompanying drawings.

FIGS. 2 and 3 show a motor equipped with a pressure medium distribution device according to the present invention, with 10
30 is a motor that generates rotational motion using a pressure medium, and 30 is a pressure medium distribution device.

This motor 10 has a rotating shaft 13 rotatably supported in a cylindrical motor casing 11 by a pair of bearings 12, and the rotating shaft 13 is provided so as to be concentric with the axis of the motor casing 11. It is being A motor casing 1 is attached to the rotating shaft 13.
A cylindrical member is fixed eccentrically inside the crank 1, thereby forming a crank 14. Note that 14a is a plurality of through holes provided to reduce the weight of the crank 14. A cylindrical crank sleeve 16 is rotatably attached to the outer surface of the crank 14 via a pair of bearings 15 .

Crank sleeve 16 of motor casing 11
Three inflatable bag-like members 17 are arranged at equal intervals around the axis of the motor casing 11 between the crank sleeve 16 and the side wall facing the side surface of the motor casing 11 . Each bag-like member 17 is attached to the side wall of the motor casing 11 by a mounting member 18 having a through hole inside. A joint 19 is attached to each attachment member 18 on the outside of the motor casing 11 . Each bag-like member 17 has an expansion chamber 2 inside.
0a, 20b, 20c, and each expansion chamber 20a, 20 is controlled by a pressure medium distribution device 30, which will be described later.
b, 20c, the pressure medium is distributed in a controlled manner to the crank 14 and thus to the rotating shaft 1.
3 is rotated.

The pressure medium distribution device 30 includes a cylindrical casing 31 having a flange 31a at the base end, a base 32 stacked inside the casing 31,
It is composed of a rotor 33, a rotor holder 34, a cap 35 screwed onto the tip of the casing 31, and a compression spring 36 provided between the cap 35 and the rotor holder 34. This pressure medium distribution device 30 has a flange 31 of a casing 31.
It is attached by fixing a to the end face of the motor casing 11.

The base 32 has a thick disk shape, and a through hole 37 is provided along its axis, and three pressure medium supply and discharge holes 38a, 38b, and 38c are formed in the radial direction on the side surface of the base 32, which are arranged equally around the axis. It is formed by intervals. base 32
Furthermore, it has a sliding surface 32a perpendicular to the axis, that is, the through hole 37, and three arcuate grooves 39a, 39b, and 39c are formed therein. These grooves 39a, 39b, 39c are connected to the supply/discharge holes 38a, 38, respectively, near their bottoms.
b, 38c, and its position is the above-mentioned through hole 3.
The centers of curvature of the grooves 39a, 39b, and 39c are positioned symmetrically around the axis of the base 32 so as to surround the grooves 7, and the center of curvature is set from the axis of the base 32 so that both ends of each groove 39a, 39b, and 39c do not join to each other. They are arranged in a staggered manner.

A joint 40 is screwed into each of the above-mentioned supply/discharge holes 38a, 38b, and 38c from the outside of the casing 31, and these joints 40 are connected to a joint 19 attached to the motor casing 11 by a connecting pipe. It is connected.

Next, the rotor 33 consists of a shaft portion 33a and a disk-shaped main body portion 33b fixed to one end of the shaft portion 33a, and the shaft portion 33a is inserted into the through hole 37 of the base 32.
The side surface of the main body portion 33b on the shaft portion 33a side is attached to the base 32.
It rotates while contacting the sliding surface 32a of. A pair of sector-shaped through holes 42a and 42b are formed in the main body portion 33b at positions symmetrical about its axis. These through holes 42a, 42b are formed at positions such that they move over the arcuate grooves 39a, 39b, 39c of the base 32 when the rotor 33 rotates. Shaft portion 33 of main body portion 33b
There is another pair of depressions 43 on the side opposite to a.
a, 43b are formed, one pair of depressions 43a extends from the axis of the main body part 33b to the through hole 42a, and the other depression 43b extends from the vicinity of the outer periphery of the main body part 33b to the through hole 42b.
It extends to

Furthermore, the rotor presser 34 is in the shape of a thick disk,
The sliding surface 34a with the rotor 33 has a communication hole 44 formed by forming a through hole on the axis of the rotor holder 34, and is concentric with the communication hole 44 and above the recess 43b of the rotor 33. Another communication hole 45 is provided by forming an annular groove to pass through. Further, a pressure medium supply port 46 and a discharge port 47 are formed on the side surface opposite to the sliding surface 34a, and the supply port 46 is connected to the communication hole 44 which is a through hole, and the discharge port 47 is an annular groove. It communicates with the communication hole 45 which consists of the above-mentioned.

The base 32, rotor 33 and rotor presser 34 are stacked in this order and housed inside the casing 31, and the rotor 33 is pressed and clamped between the base 32 and the rotor presser 34 by a compression spring 36. The shaft portion 33a of the rotor 33 has its tip engaged with one end of the rotating shaft 13 of the motor 10, so that the rotor 33 also rotates as the rotating shaft 13 rotates. Therefore, the rotor 33 rotates while bringing both side surfaces of the main body portion 33b into contact with the sliding surface 32a of the base 32 and the sliding surface 34a of the rotor holder 34. These contacts must be as tight as possible in order to minimize leakage of the pressure medium.

Next, the operating state of the pressure medium distribution device 30 configured as above will be explained.

First, compressed air is supplied to port 4 as a pressure medium.
6, the communication hole 4 of the rotor holder 34
4. Recess 43a of rotor 33 and fan-shaped through hole 42
a to reach the sliding surface 32a of the base 32. When the through hole 42a is located above the arcuate grooves 39a, 39b, 39c of the base 32, the compressed air flows through the grooves 39a, 39b, 39c and the supply/discharge hole 3.
8a, 38b, 38c, and further the communication pipe 41
distribution to the expansion chambers 20a, 20b, 20c through the
Supplied. On the other hand, the expansion chambers 20a, 20b, 20
The compressed air supplied to c is discharged through the arc-shaped grooves 39a, 39, and the fan-shaped through hole 42b, which communicates with the discharge port 47 via the recess 43b and the communication hole 45.
This is done when it is above b, 39c. In this way, the pressure medium distribution device 30 can individually distribute and supply the pressure medium to each expansion chamber 20a, 20b, 20c in order by the rotation of the rotor 33,
Moreover, it can be discharged in the same manner at the same time.

The operation of this pressure medium distribution device 30 will be explained in more detail with reference to FIG. 4 as follows.

When the rotor 33 is in the position shown in FIG.
Compressed air is supplied only through the fan-shaped through hole 4.
It is discharged only through the arcuate groove 39b that communicates with 2b. Another arcuate groove 39c is
Since it does not communicate with either of the through holes 42a, 42b, compressed air is neither supplied nor discharged through this groove 39c. Expansion chambers 20a, 2 at this time
The states of 0b and 20c are shown in FIG. 4e. That is, the expansion chamber 2 communicating with the groove 39a
0a is expanded, while the expansion chamber 20b communicating with the groove 39b is contracting, and the expansion chamber 20c communicating with the groove 39c is sealed.

In this case, due to the expansion of the expansion chamber 20a, the crank 14 is pressed diagonally upward to the left in the figure, and at the same time the expansion chamber 20b contracts, so that the crank 14 can begin to revolve in the direction of the arrow in the figure. As the crank 14 revolves, the rotor 33 also begins to rotate.

When the rotor 33 moves to the position shown in FIG. 4b, the state of communication between the groove 39a and the through hole 42a does not change, but the through hole 42b communicates with the two grooves 39b and 39c. Therefore, as shown in Figure 4f,
Compressed air is continuously supplied to the expansion chamber 20a,
The compressed air in the other two expansion chambers 20b and 20c has been exhausted.

At this time, the crank 14 can continue to revolve due to the expansion of the expansion chamber 20a.

When the rotor 33 moves to the position shown in FIG. 4c, the communication state between the groove 39a and the through hole 42a does not change, as in the case of FIG.
The difference is that 2b communicates only with the groove 39c. In this case, as shown in FIG. 4g, the expansion chamber 20a continues to be supplied with compressed air and continues to expand, while the compressed air in the expansion chamber 20c is discharged and continues to contract. The expansion chamber 20b is sealed.

In this case as well, the crank 14 can continue to revolve due to the expansion of the expansion chamber 20a.

When the rotor 33 further rotates and moves to the position shown in FIG.
b, and the through hole 42b communicates only with the groove 39c. In this case, as shown in FIG. 4h, since compressed air is supplied to the two expansion chambers 20a and 20b, the expansion chamber 20a continues to expand, and the expansion chamber 20b also begins to expand. .
The expansion chamber 20c continues to contract.

In this case, the crank 14 is pushed substantially horizontally to the left in the drawing by the expansion of the two expansion chambers 20a and 20b, so that it can continue to revolve further.

The rotor 33 rotates further and the through hole 42a opens into the groove 3.
When it comes to communicate only with 9b, the state is similar to that shown in FIG. 4a, and thereafter, the crank 14 revolves in the same manner as described above. In this way, the crank 14 and thus the rotating shaft 13 rotate continuously.

Note that the main body 33b of the rotor 33 slides between the base 32 and the sliding surfaces 32a, 34a of the rotor holder 34, and no seal member is provided between them, so some compressed air may leak through the gap. leak. However, by making both side surfaces of the main body 33b of the rotor 33 and both sliding surfaces 32a, 34a as flat and smooth as possible, it is possible to suppress the amount of leakage to a level that does not cause any practical problems.

By the way, as mentioned above, each expansion chamber 20a, 2
By supplying and discharging compressed air to 0b and 20c, the crank 14 revolves, and this revolution causes the rotating shaft 13 to rotate.
4, a force is applied to the crank 14 in a direction opposite to the revolution direction due to friction with the bag-like member 17. This force can be minimized by the rotation of the crank sleeve 16, which is rotatable.

〔Effect of the invention〕

As is clear from the above description, the pressure medium distribution device 30 according to the present invention can be used in a motor 10 in which a plurality of inflatable bag-like members 17 are arranged in parallel around a crank 14 provided on a rotating shaft 13. The necessary parts are casing 31 and base 3.
2, rotor 33, and rotor holder 34, the structure is simple, and the size of the pair of through holes 42a, 42b of rotor 33 and the groove 39 of base 32 are simple.
By changing the positions, lengths, widths, etc. of a, 39b, 39c, the distribution state of the pressure medium can be easily changed, which has excellent effects.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of a pressure medium distribution device according to the present invention. FIG. 2 is a side sectional view of the motor to which the device is attached. FIG. 3 is a sectional view taken along the line A-A in FIG. 2. FIG. 4 is an explanatory diagram showing the operating principle of the device, in which a to d show the state in which the communication state between the through hole and the groove changes according to a change in the position of the rotor, and e to h are the above-mentioned a to h. The state in which each bag-like member expands or contracts in response to changes in d is shown. 30... Pressure medium distribution device, 31... Casing,
32...Base, 32a...Contact surface, 33...Rotor,
33a...shaft part, 33b...main body part, 34...rotor holder, 35...cap, 36...compression spring, 37...
Through hole, 38a, 38b, 38c...pressure medium supply/discharge hole, 39a, 39b, 39c...groove, 40...coupling,
41...Communication pipe, 42a, 42b...Through hole, 43a,
43b... Recess, 44, 45... Communication hole, 46... Supply port, 47... Discharge port.

Claims (1)

[Claims] 1. A casing 31, and a base 32 that is fixed inside the casing 31 and has a through hole 37 and a sliding surface 32a orthogonal to the through hole 37.
It consists of a shaft portion 33a and a plate-shaped main body portion 33b,
And the shaft portion 33a is inserted into the through hole 37 of the base 32.
The rotor 33 is inserted into the rotor 33 and rotates while the side surface of the main body portion 33b on the base 32 side is in contact with the sliding surface 32a, and has a sliding surface 34a, a pressure medium supply port 46, and a pressure medium discharge port 47, The base 32 is composed of a rotor presser 34 which is pressed and held by bringing the sliding surface 34a into contact with the side surface of the main body portion 33b opposite to the base 32.
A plurality of pressure medium supply and discharge holes 38a, 38b, 38
A plurality of grooves 39a, 39b, 39 each communicating with c.
The body portion 33b of the rotor 33 has a pair of through holes 4 formed at symmetrical positions around the axis of the shaft portion 33a.
2a, 42b, and a pair of depressions 43a, 43b on the side opposite to the base 32.
and the pair of through holes 42a, 42
b is the base 3 as the rotor 33 rotates.
The rotor retainer 3
4 on the other hand, the supply port 46 and the discharge port 4
7, and the pair of recesses 43 on the other hand.
The pair of through holes 42a, 42 through a, 43b
A pressure medium distribution device characterized in that it has a pair of communication holes 44 and 45 that communicate with each other.