JPH0443608Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention particularly relates to an improvement of a vane-type oscillating motor whose output shaft can be oscillated over 360°.

[Conventional technology] Conventionally, this type of vane type swing motor is
Two structures are currently known. One of them is a system in which the applicant previously proposed in Utility Model Application No. 124303/1983, in which two vane-shaped swing motors are arranged side by side on the axis and connected so that they can rotate relative to each other. , and the other structures are Special Publication No. 54-25592
As shown in the issue, ``Multiple stages of concentric rotors are arranged in the stator, and the oil working chambers formed between the rotors and between the rotor and the stator are divided into each series and communicated with each other. Oil supply and drain ports were provided corresponding to the oil working chamber, and the innermost rotor was connected to the output shaft.

[Problems to be Solved by the Invention] The former swing motor is structurally very simple and can be implemented using a conventional swing motor, so it is inexpensive and easy to maintain. However, this structure tends to be bulky in the longitudinal direction and requires a large installation space. Furthermore, when in use, the housing of the swing motor located on the opposite side of the output shaft is attached to the device in use, resulting in poor stability and poor rigidity. In addition, it has drawbacks such as not being able to be used in a flange-mount type device in which the casing of the swing motor on the output shaft side is used as the mounting portion.

The latter type of swing motor has multiple rotors arranged concentrically, so it has the advantage of being compact in the longitudinal direction, but as mentioned above, the hydraulic chambers are connected to each series, so the output shaft The disadvantage is that the rotor always swings by the total angle of the swing angle of each rotor. In other words, in this swing motor, when one rotor swings to the working end, the oil working chambers of each series communicate and the other rotor continues to swing, so the operating output shaft always swings to the working end. The structure is such that the machine stops at a certain point, and it is impossible to make a stop in the middle of the process.

Therefore, the object of the present invention is to provide a swing motor that is an improvement on the latter swing motor and is capable of intermediate stops.

[Means for Solving the Problems] The vane type swing motor of the present invention has at least one cylindrical shaft portion 6 concentrically provided in the cylindrical casings 4 and 5 so as to be freely rotatable. At least two independent working chambers 14 and 38 are formed inside and outside the shaft 6, respectively. The inner vane section is configured by providing an inner vane 39 that swings and rotates while sliding on the inner peripheral surface of the inner vane 6, and a fixed shoe 42 that is fixed to the shaft section 6 and limits the maximum swing range of the inner vane 39. , an outer working chamber 14 formed between the shaft portion 6 and the casings 4, 5 is attached to the outer surface of the shaft portion 6 so that the inner peripheral surface of the casings 4, 5 is rotated by the rotation of the shaft portion 6. The outer vane section is composed of an outer vane 1 that swings and rotates while sliding, and a fixed shoe 16 that is fixed to the casings 4 and 5 to limit the maximum swing range of the outer vane 1. A control device is provided that individually supplies and exhausts compressed air to and from the inner and outer vanes 14 and 38 to swing the inner and outer vane portions, respectively, and the inner and outer vanes 39 and 1 are sequentially driven by this control device. At the same time, the sum of the maximum swing ranges of the inner and outer vanes 39, 1 enables the output shaft 32 to swing and rotate more than 360° relative to the casings 4, 5, so that the output shaft 32 and the shaft portion 6 and At one end of each of the casings 4, 5, when the above-mentioned inner and outer vanes 39, 1 swing and rotate, there is a gap between the output shaft 32 and the shaft portion 6, and between the shaft portion 6 and the casings 4, 5.
This configuration is provided with forced stopping means for interlocking the inner and outer vanes 39, 1 with each other at a predetermined angle within their respective maximum swing ranges.

Note that it is desirable that the forced stop means be provided at the end of the output shaft 6 on the opposite side to the output extraction side.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

Fig. 1 is a front sectional view of a vane type swing motor according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line A-A in Fig. 1. 4 is a schematic diagram showing the oscillating operation of the vane type oscillating motor, FIGS. 5 to 8 are schematic diagrams showing the oscillating state of the vane type oscillating motor, and FIG.
The figure is also a schematic diagram showing the movement of the swing vane when the output shaft swings 360° or more.

The vane type swing motor according to this embodiment has a first
As shown in Figs. 3 to 3, it has a structure in which two swing vanes (a first swing vane 1 and a second swing vane 2) are arranged concentrically in two stages.

The first swing vane 1 has a screw 3 as shown in FIG.
The two halves of the casing 4 and 5 are integrated with
It is provided on a part of the outer periphery of the shaft portion 6 that extends through the center of the shaft portion. Further, since the shaft portion 6 is provided with a second swinging vane 2, etc., which will be described later, it is composed of a pair of shaft bodies 7 and 8 divided into two parts, similar to the casings 4 and 5, and is secured with a screw 9. It is integrated and rotatably attached to the casings 4 and 5 via a bearing 10. Furthermore, first vane portions 11 and 12 are provided at the mating surface edge portions of the shaft bodies 7 and 8, respectively, and project toward the outer periphery with a constant width. The first swinging vane 1 is fixed to one of the first vane flanges 11 and 12 by a screw 13. Therefore, the rotation range of the first swing vane 1 is within the working chamber 1 of the first swing vane 1.
It becomes 4.

Further, a seal 15 is attached to the first swing vane 1.
Seals 15b are attached to the first vane flanges 11 and 12, respectively, and
The working chamber 14 is divided by the swinging vane 1 of
Air is prevented from leaking between a and 14b. Further, a first fixed shoe (stopper) 16 is provided in the working chamber 14 . This first
The fixed shoe 16 is fixed to the casing by a pin 17. This first fixed shoe 16
A seal 18 is also attached to the first fixed shoe 16, and the working chambers 14a, 1 are partitioned by the first fixed shoe 16.
4b to prevent air leakage. Note that a seal 19 is attached to the inside of the bearing 10 in the shaft portion 6, and the working chamber 14 is
airtightness is maintained.

Compressed air is supplied to the working chambers 14a and 14b from port _P1 or port _P2 provided in the casing 5 as shown in FIG. It is designed to rotate back and forth in its range of motion. The supply of compressed air to the ports P ₁ and P ₂ involves sending compressed air supplied from the air pressure source S to the switching valve 21 via the pipe 20, and also using the pipes 22 and 22 extending from the switching valve 21, respectively.
23 to ports P ₁ and P ₂ . Compressed air is supplied to one working chamber 14a or the other working chamber 14b by switching and controlling the electric signal input to the solenoid part of the switching valve 21 by a control device (not shown).

The output from the first swing vane 1 is taken out to the outside by the shaft body 8 of the shaft portion 6 protruding from the casing 5 as shown in FIG. stipulated. That is,
This forced stop means is as shown in FIG.
A first claw 2 fixed to the outer periphery of the
5 is defined by contacting a pair of stoppers 27 and 28 attached to the casing 5 via screws 26. Note that at least one of the stoppers 28 has a screw structure, and the rotation can be adjusted when the lock nut 28a is loosened. This allows fine adjustment of the swing range. Further, by changing the fixed positions of the pair of stoppers 27 and 28, the swing range of the shaft portion 6 can be changed freely. However, in this case, the swing range of the shaft portion 6 is within the first range.
It is limited within the swinging range of the swinging vane 1. In this embodiment, the swing range α ₁ of the shaft portion 6 is, for example, 90°.
is set to . Note that ring-shaped lids 2 are provided at both ends of the casings 4 and 5 to cover the bearings 10.
9 and 30 are fixed by screws 31.

On the other hand, an output shaft 32 is located at the center of the shaft portion 6.
is inserted through it. This output shaft 32
is disposed concentrically with the shaft portion 6 and is rotatably attached to the shaft portion 6 via a bearing 33 . Further, the bearing 33 is attached to a lid 3 fixed to both ends of the shaft portion 6 with screws 34 and 35.
6 and 37 to prevent it from falling off.

Further, inside the shaft portion 6, the casing 4,
As in the case of No. 5, an operating chamber 38 is provided that partially surrounds the output shaft 32 over its entire circumference. As shown in FIGS. 1 and 2, a second swing vane 2 is provided on the output shaft 32 portion corresponding to the working chamber 38, and a seal is attached to the sliding portion of the second swing vane 2. A member 40 is attached. Furthermore, seals 41 are attached to both shaft portions of the second swing vane 2 to maintain airtightness of the working chamber 38. Further, a second fixed shoe (stopper) 42 is disposed within the working chamber 38, and this second fixed shoe 42
is fixed to the shaft portion 6 by a pin 43. Therefore, working chambers 38a and 38b are defined by the second swing vane 2. Further, a seal 44 is attached to the second fixed shoe 42 to prevent air from leaking between the working chambers 38a and 38b.

The working chambers 38a, 38b are provided with a port _P3 or a port _P4 provided in the shaft body 8 as shown in FIG.
Compressed air is supplied from the second swing vane 2, and the second swing vane 2 is configured to rotate reciprocatingly in a swing range of, for example, 180°. The compressed air is supplied to the ports P ₃ and P ₄ by sending the compressed air supplied from the air pressure source S to the switching valve 46 via the pipe 45 and by using the pipes 47 and 48 extending from the switching valve 46. The structure is such that the signal is sent to the ports P ₃ and P ₄ via the LAN terminal. Compressed air is supplied to one working chamber 38a or the other working chamber 38b by switching and controlling the electrical signal input to the solenoid part of the switching valve 46 by a control device (not shown).

The output from the second swing vane 2 is taken out to the outside by the output end 32a of the output shaft 32 protruding from the lid body 29 as shown in FIG. Therefore, it is defined. That is, this forced stop means is provided at the control end 32b of the output shaft 32, which is the end opposite to the output end 32a, as shown in FIGS. 1 and 3. This control end 32b is formed with a rectangular cross section, and a second pawl 49 is fixed to the control end 32b. Further, a pair of supports 50 are fixed to the end face of the shaft body 8 by screws 51, and an adjustment screw 52 is screwed into the supports 50. This adjustment screw 52
A lock nut 53 is attached to the adjusting screw 52, and the adjusting screw 52 is brought into contact with the tip of the adjusting screw 52 and the second pawl 49
These act as stoppers 54 and 55 that stop the movement of the .

Therefore, by loosening the lock nut 53 and adjusting the rotation of the adjusting screw 52 in a desired direction, the stopping position of the second pawl 49 changes, and the swing range of the second pawl 49 can be finely adjusted. In this way, the second
The claw 49 and the adjustment screw 52 constitute a forced stopping means. In the forced stop means of this embodiment, the swing range β ₁ of the output shaft 32 is set to, for example, 180°.

Next, actual angle control will be explained. In this embodiment, the swing angle of the first swing vane 1 is α,
This will be explained as the swing angle β of the second swing vane 2. First, a case having an intermediate stop function as shown in FIG. 3 will be described with reference to FIGS. 4 to 8.

The embodiments shown in FIGS. 1 to 3 will be briefly described as shown in FIG. 4 as a schematic diagram for explanatory purposes.

The first swing vane 1 is located in the middle of the swing angle and is set to be swingable by _α1 . This angle is the fourth
As shown in the figure, the first pawl 25 attached to the shaft portion 8 of the swinging vane is defined between the stopper 27 and the stopper 28 by rotating simultaneously with the vane.

On the other hand, the second swing vane 2 is as shown in FIG.
The second pawl 49 fixed to the control end 32b rotates between the stopper 54 and the stopper 55 disposed at the swing end, and the swing angle is β ₁ . These individual swing vanes each constitute an intermediate stop function.

Next, a control example of the rocking device set as shown in FIG. 4 will be explained. However, for the sake of explanation, only the movement of the vane is shown, and the supply and discharge of fluid (air pressure) to both chambers of the swinging vane is omitted.

First, the first swing vane 1 rotates by α 1 as shown by the arrow until the first pawl 25 in contact with the stopper 27 rotates from the operating end and comes in contact with the stopper 28 as shown in _FIG . do. At this time, since the stopper 54 and the stopper 55 are fixed to the shaft portion 6, they rotate with the rotation of the first swing vane 1. Next, the second swing vane 2 rotates, and the second pawl 49 that is in contact with the stopper 54 rotates from the operating end until it comes into contact with the stopper 55, as shown in FIG. Rotate β ₁ time like this.

In this example, if α ₁ is 90° and β ₁ is 180°, the total oscillation can be accurately 270°, and 90°
It is possible to stop in the middle.

On the other hand, the second swing vane 2 is swung from the state shown in FIG. 4, and as shown in FIG.
Rotate β ₁ turn until it touches point 5. Thereafter, the first swing vane 1 is swung, and the first pawl 25 moves from the stopper 27 abutting position to the stopper 28 as shown in FIG.
It can also be controlled to rotate α ₁ turn as shown by the arrow until it comes into contact with .

In this example, the intermediate stop of the output shaft is 180°,
The entire structure swings 270°.

Further, the angle is not limited to the above-mentioned example, and the angle can be arbitrarily set within the total swing angle, and the operation control method is not limited to the above-mentioned example, but can be implemented in various ways. For example, as shown in FIG. 9, the swing α of the first swing vane 1 is
is 270°, and the swinging β of the second swinging vane 2 is 180°, then by changing the control procedure of the first swinging vane 1 and the second swinging vane 2, it is possible to Alternatively, it is possible to make a 270° intermediate stop, and also achieve a full-angle swing of 450°, which exceeds 360°.

Regarding the intermediate stop function, when stopping the swing vane at any intermediate position as described above, it is performed by changing the positions of each stopper 27, 28 and stopper 54, 55, but only such an intermediate stop can be performed. Instead, it is preferable to include a means for precisely stopping at a predetermined position by finely adjusting the stop position, for example. In this embodiment, both of the above can be considered as forced stop means.

As in the above embodiments, the vane type swing motor of the present invention has at least two swing systems arranged concentrically and each driven and controlled by an individual control device. By sequentially oscillating one oscillation system, it is possible to make an intermediate stop at the end position of one oscillation system, and then by oscillating the other oscillation system, the individual oscillation systems can oscillate more than 360° in total. can be achieved.

In addition, intermediate stopping at any predetermined angle is possible using the above-mentioned intermediate stopping means, and this intermediate stopping means is arranged in a concentrated manner at the end of the output shaft opposite to the output take-out side. This also facilitates swing range adjustment work and maintenance.

In addition, by arranging the inner and outer swinging vanes concentrically, the length in the longitudinal direction, that is, the axial direction of the output shaft, is shortened, making it more compact. Since it can be attached to equipment using the surface or cylindrical casing circumferential surface, installation work is easy and strong installation is possible, and in this case it is also possible to provide a flange on the casing part on the output shaft side. As in the case of the latter conventional example described above, the flange mount method that can achieve strong mounting can be adopted.

It should be noted that the present invention is not limited to the above embodiments, and can be modified in various ways without departing from the gist thereof. For example, the shaft portion 6 of the first swinging vane 1 shown in FIG.
Although ports P ₃ and P ₄ are provided, since these ports P ₃ and P ₄ are integrated with the first swing vane 1, the piping portion swings together when the piping portion swings, which is unfavorable in terms of piping. In that case, if a rotary joint structure (R) is used as shown in FIG. 10, the piping can be made more compact by preventing it from twisting around.

Further, in the embodiment described above, the number of swing vanes is two stages, but it is also possible to further increase the number of swing vanes.

Further, in the above embodiment, the output shaft was connected only to the innermost vane, but it is also possible to take out the output shaft concentrically from the outer vane portion and use it as an output for another work.

[Effects of the invention] The vane type swing motor of the present invention includes at least two swing vanes that are arranged concentrically and are driven and controlled individually. By rotating, the total
Oscillation of more than 360° can be achieved, but in this case, the individual oscillating vanes are temporarily stopped at the end of oscillation, making it possible to stop the output shaft in an intermediate position. It can be set to any predetermined angle. Therefore, compared to the latter conventional example mentioned above which cannot be stopped in the middle, the present invention is a small vane type swing motor that can be adapted to various uses and is more convenient to use.

Further, by arranging the intermediate stop means concentrated on the end of the output shaft opposite to the output take-out side, the swing range adjustment work and maintenance are also facilitated.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view of a vane-type swing motor according to an embodiment of the present invention, and FIG.
- A cross-sectional view along line A, Figure 3 is also B of Figure 1.
-A right side view seen from the B direction, Fig. 4 is a schematic diagram showing the swinging operation of the vane type swing motor, and Figs. 5 to 8
The figure is also a schematic diagram showing the oscillating state of the vane type oscillating motor, FIG. 9 is a schematic diagram showing the movement of the oscillating vane when the output shaft oscillates over 360 degrees, and FIG.
The figure is a sectional view of another embodiment of the present invention. Explanation of symbols, 1...first swinging vane, 2...
Second swinging vane, 4, 5...Casing, 6...
...Shaft portion, 14...Working chamber, 16...First fixed shoe, 21...Switching valve, 25...First pawl, 2
7, 28...stopper, 32...output shaft, 38...
... Working chamber, 39 ... Second vane section, 42 ... Second fixed shoe, 46 ... Switching valve, 49 ... Second
Nails, 54, 55...stoppa.

Claims (1)

[Claims for Utility Model Registration] (1) At least one or more cylindrical shaft portions 6 are rotatably provided in the cylindrical casings 4 and 5 in a concentric state, and the shaft portions 6 are used to divide the interior and exterior into inner and outer parts. At least two independent working chambers 14 and 38 are formed, respectively, and the inner working chamber 38 formed by the shaft section 6 has a section attached to the output shaft 32 that slides on the inner circumferential surface of the shaft section 6. The inner vane part is configured by providing an inner vane 39 that swings and rotates while rotating, and a fixed shoe 42 that is fixed to the shaft part 6 and limits the maximum swing range of the inner vane 39, and the shaft part 6 and the casing In the outer working chamber 14 formed between the casings 4 and 5, it is attached to the outer surface of the shaft portion 6 and swings and rotates while sliding on the inner circumferential surfaces of the casings 4 and 5 as the shaft portion 6 rotates. An outer vane section is formed by providing an outer vane 1 and a fixed shoe 16 that is fixed to the casings 4 and 5 to limit the maximum swing range of the outer vane 1. A control device is provided for supplying and exhausting compressed air to swing the inner vane portion and the outer vane portion, respectively, and the inner and outer vanes 3 are driven by this control device.
9 and 1 in sequence, the output shaft 32 can be oscillated by more than 360° relative to the casings 4 and 5 by the sum of the maximum oscillation ranges of the inner and outer vanes 39 and 1, and the output shaft 32 At one end of each of the shaft section 6 and the casings 4, 5, there is a space between the output shaft 32 and the shaft section 6 and between the shaft section 6 and the casing when the aforementioned inner and outer vanes 39, 1 respectively swing and rotate. A vane type swing motor characterized in that a forced stopping means is provided for interlocking the inner and outer vanes 39 and 5 and stopping each of the inner and outer vanes 39 and 1 at a predetermined angle within their respective maximum swing ranges. . (2) The vane type swing motor according to claim (1), wherein the forced stop means is provided at the end of the output shaft 6 on the opposite side from the output extraction side.