JPH0432A - Rotational shock absorber - Google Patents

Abstract

PURPOSE:To control a degree of shock absorption, and make a device contact by providing a flow quantity control means for continuing a fluid chamber and a continuity chamber to control a flow quantity of the fluid in a fluid chamber appropriately through this continuity chamber and for moving the fluid from one of fluid chambers divided with a movable impeller to the other. CONSTITUTION:When the turning force by collision is applied from the outside, a movable impeller 6 tries to turn. At this stage, when the fluid is filled in a fluid chamber 3, the fluid pushed by the impeller 6 is flowed from one of a fluid chamber 3a divided with the impeller 6 into a fluid continuity chamber 4 through an orifice 3 communicated with the fluid chamber 3a, and is passed through a return hole 24 to be moved to a fluid chamber 3b. At this stage, an appropriate number of orifices 8 and an appropriate number of communication holes 9 are communicated selectively by sliding a communication control member 10 of a flow quantity control means for control appropriately to select an appropriate number of the orifices 8 where the fluid is passing through, and a flow resistance is controlled appropriately, and the turning energy by shock of the impeller 6 is converted to the heat to be absorbed.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotating shock absorber, for example,
When stopping conveyed objects such as trays and other products moving on a line at a predetermined work location, it is necessary to reduce the shock that is applied to the conveyed objects as much as possible due to the stoppage, or to prevent sudden movement of the operating arm of the robot. This invention relates to a rotating shock absorber that absorbs the shock of stopping.

(Prior Art) Conventionally, a shock absorber has the simplest structure, for example, one using a spring or the like.

That is, when stopping the conveyed object at a predetermined work location, for example, a coil spring or an elastic resin material is placed at the stopping position so as to receive the conveyed object in the traveling direction. After finishing, the spring etc. are moved appropriately from the line to allow the conveyed object to pass.

Furthermore, as a structure superior to the above-mentioned shock absorber, there is a shock absorber formed into a straight cylinder shape by utilizing the viscous resistance of liquid, especially oil.

In this shock absorber, a cylinder is filled with oil, and an orifice is provided in the piston that slides inside the cylinder, so that the amount of oil that passes through the orifice as the piston moves is minimized. This structure uses the viscous resistance of the oil to convert the sudden movement of the piston, that is, its kinetic energy, into heat and absorb it.

This shock absorber is often used to absorb shocks from the above-mentioned lines and operating arms of robots, and is also often used in other jigs and the like.

(Problem to be Solved by the Invention) However, the former type of shock absorber simply attempts to absorb shock by using elasticity, and the shock absorber may be bounced back by the repulsive force or may vary in its stopping position. Currently, it is not used much in practice due to the problems that occur.

The latter type of shock absorber has been widely used in recent years, and has advantages such as excellent shock absorption and easy setting of the stopping position, but this shock absorber also has the following problems. Ta.

That is, since it is difficult to adjust the diameter or number of orifices provided in a piston that slides inside a cylinder during use, it is difficult to adjust the diameter or number of orifices during use. This is inconvenient because it is necessary to appropriately adjust the degree of shock absorption depending on the type of objects being transported through the line.

Also, in the case of this shock absorber, it is a type that absorbs shock in a straight line, so when it is necessary to make an angle of deviation in the direction in which the shock is to be absorbed, the maximum angle is about 5 degrees. There is a problem that the normal type can only take a declination of up to about 2.5 degrees, and furthermore, since it is a type that absorbs shock linearly, the stroke Since the length is required, a certain amount of space is required at the installation location in the length direction, and installation may become difficult in a narrow installation location.

Therefore, in view of the above-mentioned problems, the present invention makes it possible to sufficiently cope with the case where a deflection angle is required in the direction in which the shock is to be absorbed, and also makes it possible to adjust the degree of shock absorption. It was created with the goal of achieving a

(Means for Solving the Problems) The present invention includes a casing with a cavity formed inside, a dividing wall that divides the cavity in the casing into a fluid chamber and a fluid communication chamber, and a partition wall that divides the fluid chamber. A partition body disposed within the fluid chamber, a movable vane disposed slidably and rotatably within the fluid chamber and divided into a plurality of fluid chambers by the partition body, and a rotating force transmitted from the outside to the movable vane. A transmission member that rotates the movable vane is provided on the dividing wall, and conducts the fluid chamber and the conduction chamber, so that the fluid in the fluid chamber is divided by the movable vane by appropriately adjusting the flow rate through the conduction chamber. The flow rate adjusting means includes a plurality of orifices opened in the dividing wall, and a flow rate adjusting means for moving the fluid chamber from one side of the fluid chamber to the other. It consists of a communication adjustment body that is in sliding contact with each other and has a plurality of communication holes drilled therein, and by appropriately slidingly adjusting the communication adjustment body, an appropriate number of the plurality of orifices and an appropriate number of communication holes can be formed. The above-mentioned problem is solved by forming the communication adjustment body to selectively communicate with the partition wall, and the communication adjustment body is brought into pressure contact with the dividing wall by the elastic force of a spring, thereby solving the above-mentioned problem. .

(Function) In the rotary shock absorber according to the present invention, when a rotational force due to an external collision is applied to the transmission member, the movable blade tends to rotate.

At that time, if the fluid chamber is filled with fluid, the fluid pushed by the movable vane will pass from one fluid chamber divided by the movable vane, pass through the orifice, flow into the fluid communication chamber, and flow into the other fluid chamber. Moving.

At that time, by appropriately sliding and adjusting the communication adjustment body of the flow rate adjustment means, an appropriate number of the plurality of orifices and an appropriate number of communication holes are selectively communicated with each other, so that the fluid passes through. The number of orifices to be used is appropriately selected, the flow resistance when the fluid passes through the orifices is appropriately adjusted, and the rotational energy due to the impact of the movable blade is absorbed.

Also, if the impact rotational force applied to the movable blade is momentarily large, it cannot be absorbed completely depending on the number of orifices, so in that case, the communication adjustment body is separated from the dividing wall against the elastic force of the spring, This allows fluid to flow out of all orifices into the fluid conducting chamber.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

That is, FIGS. 1 to 4 show a first embodiment, in which reference numeral 1 denotes a rotating shock absorber, which includes a casing 2 with a cavity formed inside, and a fluid chamber 3 in which the cavity inside the casing 2 is formed. A dividing wall 5 that divides the fluid communication chamber 4 into the fluid chamber 4, a partition disposed within the fluid chamber 3 to divide the fluid chamber 3, and a partition disposed slidably and rotatably within the fluid chamber 3. A movable blade 6 that is divided into a plurality of fluid chambers, a rotation shaft 7 serving as a transmission member that transmits rotational force from the outside to the movable blade 6 to rotate the movable blade 6, and a rotation shaft 7 that is provided on the dividing wall 5. By bringing the fluid chamber 3 and the conduction chamber 4 into communication with each other, the flow rate of the fluid in the fluid chamber 3 is adjusted appropriately through the conduction chamber 4, and the fluid is transferred from one side of the fluid chamber 3 divided by the movable blade 6 to the other. and a flow rate adjustment means for moving the flow rate.

The casing 2 includes an outer cylinder 15, an adjustment body support lid 16 that seals one opening of the outer cylinder 15 and supports the communication adjustment body 10, and prevents the adjustment body support lid 16 from falling off. It consists of an annular lid screw 17 that is fastened to the outer cylinder 15, and a support lid 18 that is press-fitted into the other open end of the outer cylinder 15 and closed by being fastened by some kind of fastening means.

The dividing wall 5 is fitted inside the adjusting body support lid 16 and has a disc shape with an appropriate thickness, and has continuous grooves cut approximately halfway around the circumference in the circumferential direction of the dividing wall 5. The portion is defined as a fluid conduction chamber 4, and from the inside surface of this fluid conduction chamber 4, for example, as shown in FIG. 3, three orifices 8 are formed.
Open the hole. On the other hand, a wall is integrally formed inside the outer cylinder 15 near the opening end on the side where the support lid 18 is press-fitted, and a wall has a cross section between it and the surface where the orifice 8 is opened. A substantially fan-shaped fluid chamber 3 is formed. In this case, the reason why the fluid chamber 3 is fan-shaped is that the rotation shaft 7 is not arranged on the central axis of the outer cylinder 15, and in the illustrated case, the fluid chamber 3 is oriented downwardly from the central axis. The rotating shaft 7 is inserted through and disposed in the key part of the fan shape of the chamber 3.

Normally, it would be a circular fluid chamber, but as mentioned above, the rotation axis 7 is shifted from the center of the outer cylinder 15, so it has a fan-shaped fluid chamber 3, and the partition wall at that time is formed integrally with the outer cylinder 15.

A fluid injection hole 2 is formed in the wall integrally formed inside the outer cylinder 15 near the opening end on the side where the support lid 18 is press-fitted.
0 is opened, and when supplying fluid, the plug screw 21 screwed in is removed and the fluid is injected.

Further, the above-mentioned movable blade 6 is fixed to the rotation shaft 7, and the fluid chamber 3 is rotated in a state where the fluid chamber 3 is divided about the fan-shaped key point in the cross-sectional shape. The orifice 8 is opened in one of the fluid chambers 3a, and the other fluid chamber 3a is opened in the other fluid chamber 3.
A return hole 24 is drilled on the side b, and the movable blade 6 has a return hole 24 on the movable side.

When the root 6 rotates in the direction of one fluid chamber 3a, there is no direct flow of fluid from one fluid chamber 3a to the other fluid chamber 3b, and the movable blade 6 rotates in the direction of the other fluid chamber 3b. In this case, a check valve 22 is provided to allow fluid to directly flow from the other fluid chamber 3b to one fluid chamber 3a.

On the other hand, the flow rate adjusting means includes a plurality of orifices 8 opened in the aforementioned dividing wall 5, and a plurality of communication holes 9 that are in sliding contact with the dividing wall 5 from the conduction chamber 4 side at least in a range that covers these orifices 8. The communication adjustment body 10 is made of a plurality of orifices 8 and a communication hole 9. By appropriately sliding the communication adjustment body 10, an appropriate number of orifices 8 and an appropriate number of communication holes 9 can be selectively selected. It is formed to communicate with the

Specifically, as shown in FIG. 1, one end surface of the substantially rod-shaped communication adjustment body 10 is made thick enough to cover all of the orifices 8, and this end surface covers all the orifices 8. It is inserted into the casing 2 from one end side and rotatably supported by the adjustment body support lid 16. and,
A plurality of communication holes 9 are opened at appropriate positions in this one end surface, and by rotating the communication adjustment body 10, for example, three
One of the orifices 8 communicates with the communication hole 9, and only that one orifice 8 establishes electrical continuity between the fluid chamber 3 and the fluid communication chamber 4.

Then, by further rotating the communication adjustment body 10, the two orifices 8 and the communication hole 9 communicate with each other, and if the three orifices 8 and the communication hole 9 communicate with each other, two or three orifices are formed. 8 establish electrical continuity between the fluid chamber 3 and the fluid communication chamber 4, respectively. At this time, the rotation of the communication adjustment body 10 can be performed by, for example, attaching the knob 12 to the other end of the communication adjustment body 10 protruding from the casing 2 using the set screw 13.
For example, scales or marks (not shown) are attached to the knobs 12, and by setting these as appropriate, the number of connections can be freely adjusted to ~3. It is intended to do so.

In this case, it is preferable to position the communication adjustment body 10 parallel to the rotation axis 7 and as close as possible to the end of one of the fluid chambers 3a, since this allows the rotation angle of the movable blade 6 to be larger. be. Further, this communication adjustment body 10 is formed such that the end face on which the communication hole 9 is provided is brought into pressure contact with the dividing wall 5 by the elastic force of a spring 11 that is fitted onto the communication adjustment body 10. .

Then, when a rotational force due to an external collision is applied to the rotation shaft 7, the movable blade 6 tends to rotate.

At that time, if the fluid chamber 3 is filled with fluid, the fluid pushed by the movable vane 6 will flow from one fluid chamber 3a divided by the movable vane 6 to the orifice 8.
The fluid flows through the fluid passage chamber 4, and from there flows through the return hole 24 and flows into the other fluid chamber 3b.

At that time, an appropriate number of the plurality of orifices 8 and an appropriate number of the communication holes 9 are selectively brought into communication by appropriately slidingly adjusting the communication adjusting body 10 of the flow rate adjusting means. The number of orifices 8 through which the fluid passes can be selected as appropriate, and the flow resistance when the fluid passes through the orifices 8 is adjusted appropriately, and rotational energy due to the impact of the movable blade 6 is converted into heat due to the flow resistance and absorbed. do. The shock absorption state at that time is a substantially trapezoidal curve as shown in FIG.

Also, if the impact rotational force applied to the movable blade 6 is momentarily large, it cannot be absorbed completely depending on the number of orifices.
At that time, the communication adjusting body is separated from the dividing wall against the elastic force of the spring, so that the fluid flows out from all the orifices into the fluid communication chamber.

On the other hand, the rotating shock absorber 31 of the second embodiment shown in FIGS. 5 and 6 is technically the same as the first embodiment, but the rotating shaft 37 is arranged at the center of the casing 32, Communication adjustment body 40. A knob 42 for rotating the fluid chamber 33 and a dividing wall 35 are respectively fitted onto the rotating shaft 37, and the fluid chamber 33 has a circular cross section, and a partition body 44
is integrated with the rotating shaft support 49, and the retaining pin 5
3, the check valve 52 of the movable vane 36 is formed using a ball, and the orifice 38 and communication hole 39 are formed as shown in FIG. The other fluid communication chambers 34 are arranged as shown in FIG.
Set screw 43, outer cylinder 45, adjustment body support cylinder 46, lid screw 4
7. The support lid 48, fluid injection hole 50, plug screw 51, and return hole 54 are the same as in the first embodiment, and their functions are also the same. However, unlike the coil spring in the first embodiment, the spring 41 is annular with a semicircular arc cross section, and generates an elastic force against the force that tends to crush the semicircular arc. It is a wave washer designed to

Rotating shock absorber 1, 31 formed in this way
is used, for example, as shown in FIGS. 7 and 8.

That is, the base ends of two arms A are fixed to the rotating shafts 7 and 37 of the rotating shock absorbers 1 and 31, and the contact rollers R are pivotally supported at the tips of these arms A. . When the conveyed object moving along the line L collides with the abutting roller R, the resulting rotational force is applied to the rotating shaft 7.3.
7 and absorbs the impact, the contact roller R rotates forward in the traveling direction and stops.

Therefore, when the conveyed object moves again on the line L after the appropriate work has been carried out, a part of the arm A is bent and the abutting roller R is removed from the line L, and the conveyed object continues to move. Immediately thereafter, arm A returns to its original position.

It goes without saying that the rotary shock absorber according to the present invention is not limited to the embodiments described above.

(Effects of the Invention) The present invention configured as described above includes a casing 2 with a cavity formed inside, and a fluid chamber 3 that connects the cavity in the casing 2.
a partition wall 5 that divides the fluid chamber 3 into a fluid communication chamber 4; a partition body disposed within the fluid chamber 3 to divide the fluid chamber 3; a movable blade 6 that is divided into a plurality of fluid chambers 3 by a transmission member that transmits rotational force from the outside to the movable blade 6 to rotate the movable blade 6; 3 and the conduction chamber 4, the fluid chamber 3 is connected through the conduction chamber 4.
The fluid chamber 3 is divided by movable vanes 6, and the fluid chamber 3 is divided by a movable blade 6. 8, and a communication adjusting body 10 that is slidably in contact with the dividing wall 5 from the conduction chamber 4 side in a range that covers at least these orifices 8, and has a plurality of communication holes 9 opened therein. When rotational force is applied due to the collision, the movable blade 6 attempts to rotate.

At that time, if the fluid chamber 3 is filled with fluid, the fluid pushed by the movable vane 6 will flow from one fluid chamber 3a divided by the movable vane 6 to the fluid communication chamber 4 through the orifice 8. It flows and moves to the other fluid chamber 3b.

At that time, an appropriate number of the plurality of orifices 8 and an appropriate number of the communication holes 9 are selectively brought into communication by appropriately slidingly adjusting the communication adjusting body 10 of the flow rate adjusting means. By appropriately selecting the number of orifices 8 through which the fluid passes and appropriately adjusting the flow resistance when the fluid passes through the orifices 8, the shock absorption capacity can be selected as appropriate depending on the location and manner of use, making it extremely versatile. It becomes possible to use it in the field.

Furthermore, even when a deflection angle is required in the direction in which the shock is to be absorbed, since the direction of absorption is the direction of rotation, it is possible to fully accommodate this, and as mentioned above, the degree of shock absorption can be adjusted. Moreover, since it is a rotating shock absorption system, it can be made smaller compared to the conventional one-cylinder type, which is a linear shock absorption system.

In addition, if the impact rotation force applied to the movable blade 6 is momentarily large, it cannot be absorbed completely depending on the number of orifices 8, so in that case, the communication adjustment body 10 is moved against the dividing wall against the elastic force of the spring 11. 5 and all orifices 8
The fluid is caused to flow out from the chamber into the fluid communication chamber 4.

As described above, according to the present invention, even when a deflection angle is required in the direction in which the shock is to be absorbed, it is possible to sufficiently cope with the need, and it is also possible to adjust the degree of shock absorption, and to achieve miniaturization. It has various excellent effects such as the ability to

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIG.
A sectional view of the embodiment, FIG. 2 is an exploded perspective view, FIG. 3 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 4 is a line diagram showing the shock absorption state, and FIG. FIG. 6 is a cross-sectional view taken along the line II--V in FIG. 5, FIG. 7 is a side view of the device in use, and FIG. 8 is a front view of the device in use. DESCRIPTION OF SYMBOLS 1...Rotating shock absorber-12...Casing, 3...Fluid chamber, 3a...One fluid chamber, 3b...
...Other fluid chamber, 4...Fluid conduction chamber, 5...Dividing wall, 6...Movable blade, 7...Rotating shaft, 8...Orifice, 9...Communication hole, 10... Communication adjustment body, 11
... Spring, 12 ... Knob, 13 ... Set screw, 14 ... Set screw, 15 ... Outer cylinder, 16 ...
- Adjustment body support lid, 17... Lid screw, 18... Support lid, 19... Rotation shaft support cylinder, 20... Fluid injection hole, 2
DESCRIPTION OF SYMBOLS 1... Plug screw, 22... Check valve, 23... O-ring, 24... Return hole, 31... Rotating shock absorber-32... Casing, 33... Fluid chamber, 34 ...Fluid conduction chamber, 35
...Dividing wall, 36... Movable blade, 37... Rotating shaft, 38... Orifice, 39... Communication hole, 40...
・Communication adjustment body, 41... Spring, 42... Knob, 43... Set screw, 44... Partition body, 45...
・Outer cylinder, 46...adjustment body support cylinder, 47...lid screw,
48... Support lid, 49... Rotating shaft support, 50...
Fluid injection hole, 51... Plug screw, 52... Check valve, 5
3... Stopping pin, 54... Return hole, A... Arm, L... Line, R... Contact roller Patent Applicant Unidyne Co., Ltd. Agent Patent Attorney Masa Nakamura
Figure 3 Figure 6 @ Figure 7 @ Figure 8

Claims (1)

[Scope of Claims] 1. A casing with a cavity formed inside, a dividing wall that divides the cavity in the casing into a fluid chamber and a fluid communication chamber, and a partition wall disposed within the fluid chamber to divide the fluid chamber. partition body,
a movable blade disposed in a slidable and rotatable manner within a fluid chamber and divided into a plurality of fluid chambers by a partition; a transmission member that transmits rotational force from the outside to the movable blade to rotate the movable blade; The fluid chamber is provided in the dividing wall and conducts between the fluid chamber and the conduction chamber, so that the fluid in the fluid chamber is moved from one side of the divided fluid chamber to the other by the movable vane, adjusting the flow rate appropriately through the conduction chamber. The flow rate adjusting means includes a plurality of orifices drilled in the dividing wall, and a plurality of communicating holes that slide into the dividing wall from the conduction chamber side at least in an area covering these orifices. The communication adjustment body is formed to selectively communicate with an appropriate number of the plurality of orifices and an appropriate number of the communication holes by appropriately sliding and adjusting the communication adjustment body. A rotating shock absorber characterized by: 2. The rotary shock absorber according to claim 1, wherein the communication adjustment body is brought into pressure contact with the dividing wall by the elastic force of a spring.