JPH07190096A - Torque limiter - Google Patents

Abstract

PURPOSE:To provide a torque limiter for controlling the input rotation to a rotor by the resistance of an oil to provide a speed-reduced output rotation by providing a gear pump in which a pair of mutually geared rotors are combined in a proper place of an endless closed passage in which the oil is sealed. CONSTITUTION:An endless closed passage 2 having an oil sealed in a flat body 1 horizontally arranged is formed. A flow rate regulating valve 8 having a control part 7 on the outside of the body 1 is integrated into a passage 6 on one end part, and a check valve 9 for limiting the flow of the oil in one direction is integrated into a passage 10 on the other end part. A communicating passage 13 having a gear pump 15 arranged therein is provided between main passages 14, 14. The shaft 17 of the gear pump 15 is protruded to the outside of the back surface of the body 1 to form an input and output shaft 18, and the body 1 is vertically arranged so that the mutually opposed main passages 14, 14 are vertically situated, and both the end part passages 6, 10 are laterally situated, and the upper main passage 14 is set to form a pressure reducing-side passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a gear pump in which a pair of rotors meshing with each other are combined at appropriate places in an endless closed flow path in which oil is sealed, and the rotor of the gear pump is provided. Input rotation is controlled by the resistance of oil,
The present invention relates to a torque limiter that obtains decelerated output rotation.

[0002]

2. Description of the Related Art Generally, in a conventional torque limiter, for example, a pressing member such as a ball or a roller is pressed against a recess formed in a disc with a certain pressure set appropriately to connect both the pressing member and the disc. A structure in which the rotation is transmitted by means of a structure in which the pressing body separates from the recess and slips on the disk surface against overload is often used, and the required rotation mechanism is rotated at a constant tension, or It was used for the purpose of protecting the drive source in the rotating device.

By the way, the pressing force of the pressing body is set in advance,
In order to keep this set state constant, it is usual to use the elastic force of the spring, and the adjustment of the elastic pressure is done by tightening or tightening the adjusting bolt, or nut, etc., the mechanism as a whole, The structure became complicated, and the product had to be expensive.

Further, with respect to an overload, the pressing member such as a ball pressed by the elastic force of the spring is detached from the recess of the disk and slips on the disk surface. Or, there is a possibility that mechanical pressure such as wear will occur in the pressing body, which may cause unexpected change of the preset pressure, such as wear inspection of the mechanism and adjustment of spring elastic pressure. Always needed maintenance and inspection.

Therefore, it is desired to develop a torque limiter which has a simple mechanism and structure, can be manufactured at a low cost, and is easy to maintain and inspect. Although it has been found that the torque reduction can be achieved by such a method, it is quite difficult to obtain the desired effect as a torque limiter.

That is, oil, which is a viscous fluid, contains air, and a phenomenon occurs in which this air is compressed earlier than the oil that is moved according to the operation of the gear pump. This is because the deceleration reaction of output rotation is delayed.

[0007]

The problem to be solved is that the conventional torque limiter has a large possibility of mechanical inconvenience such as wear, and that in the case of using oil. That is, the deceleration reaction is delayed by the air contained in the oil.

[0008]

According to the present invention, a horizontally elongated flat main body, an endless closed flow passage formed in the main body and containing oil, and a flow passage at one end of the main body are arranged in the left-right direction. And a through-flow passage formed between the parallel flow passages, and a flow rate adjusting valve that is incorporated in the through-flow passage and has an operating portion outside the side of the main body, and the other end of the main body. Built in the flow path of the part, a check valve that limits the flow of oil in one direction,
It is composed of a communication passage provided between opposing main passages, in which a gear pump is disposed, and an input / output shaft formed by projecting the shaft of the rotor of the gear pump outside the rear surface of the main body.

Further, a horizontally elongated flat main body, an endless closed flow passage formed in the main body and containing oil, and a flow passage at one end of the main body are incorporated into the operation portion outside the main body. Is provided between the main flow passage and a check valve which is installed in the flow passage at the other end of the main body and restricts the oil flow in one direction. It consists of a communication channel and an input / output shaft formed by projecting the shaft of the gear pump rotor to the outside of the rear surface of the main body.The opposing main channels are located above and below, and both end channels are located at the left and right positions. It is preferable to dispose the main body vertically as described above and set the main flow path on the upper part of the main body to be the pressure reducing side flow path by the gear pump.

A flow rate adjusting valve in which flow passages at one end of the main body are arranged side by side in a left-right direction in a gap-like manner, a through flow passage is formed between the parallel flow passages, and an operating portion is provided outside the side portion of the main body. Should be incorporated.

An air chamber is preferably provided at the upper edge of the main flow path above the main body.

It is preferable that the main flow path in the upper part of the main body is inclined toward the air chamber.

It is preferable that the check valve is capable of changing direction, the air chambers are symmetrically provided in each of the main flow passages, and the main flow passages are inclined toward the air chambers.

[0014]

By continuously inputting a constant rotational force to the input / output shaft, the pair of rotors of the gear pump rotate, and the oil enclosed in the sealed flow path is transferred from one side to the other side. Although it tries to move to the side, because it is a closed flow path, the flow of oil receives resistance, the rotational force of the rotor is controlled, and the input / output shaft outputs the rotational force that is decelerated from the input rotational force. To do.

The once decelerated rotational force of the input / output shaft is accelerated by the constant rotational force that is continuously input, and the rotor is actuated again by this accelerated rotation, and the rotational force is again decelerated. By repeating this state, the rotational force of the input / output shaft is controlled.

At this time, by incorporating a flow rate adjusting valve provided with an operating portion outside the main body into the closed flow passage, the amount of oil flowing through the closed flow passage can be arbitrarily adjusted, and the rotational force of the input / output shaft can be adjusted. Can be controlled more reliably.

The flow passages at one end of the main body are arranged side by side in the left-right direction, and the flow rate adjusting valve is incorporated in the through-flow passage formed between the parallel flow passages. It is possible to provide an operating section in the, and it is easy to make fine adjustments.

The check valve incorporated in the flow path at the other end of the main body operates by the oil flow caused by the rotation of the input / output shaft in one direction set in advance, and closes the flow path at the other end. , It concentrates the oil flow in the flow path at one end, and maximizes the control function of the gear pump. Only when rotating in one direction to the input / output shaft, the input / output shaft can be moved in one direction. Will be controlled and output.

On the other hand, when the input / output shaft rotates in the other direction, the oil flow in the closed flow path is in the opposite direction, and the check valve in the flow path at the other end remains open.
The oil flows separately in the flow passages at both ends, the amount of oil passing through the flow passages at the other end becomes large, and the rotor of the gear pump merely exhibits the function of moving the oil. That is, when the input / output shaft is rotationally input in the other direction, the input / output shaft is rotationally output in the input state without controlling the rotational force.

Further, the flat main body is vertically arranged so that the opposing main flow paths are located above and below and both end flow paths are at the left and right positions, and the main flow path above the main body is on the pressure reducing side by the gear pump. By setting the flow path, the air contained in the oil gathers in the upper main flow path, and the oil immediately moves and reacts in the lower pressure-side flow path without being obstructed by the air.

Further, since the air chamber is provided at the upper edge of the main flow passage in the upper part of the main body, the air contained in the oil collected in the upper main flow passage is converged to the air chamber, and the reaction state of the oil is changed. Be certain.

The air contained in the oil in the upper main passage is guided to the air chamber along the inclination of the upper main passage of the main body toward the air chamber.

The check valve can be turned, the air chambers are symmetrically provided in the main flow passages, and the main flow passages are inclined toward the air chambers. It is possible to use it even when the input and output rotation to the input and output shaft is opposite.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 is a flat body having an endless closed flow passage 2 in which oil is sealed, and is formed of a material such as aluminum die casting. The main body 1 is composed of a main body 3 and a lid body 4.

Reference numeral 5 is a through passage formed in the main body 3 between the flow passages 6 and 6 in which the flow passages 6 and 6 at one end of the closed flow passage 2 are arranged side by side in the direction of a gap. A flow rate adjusting valve 8 provided with an operating portion 7 outside the side portion of the main body 1 is incorporated in the through passage 5.

A check valve 9 is incorporated in the flow path 10 at the other end of the closed flow path 2 and restricts the oil flow in one direction.
The oil flow can be changed by operating the switching screw 11 and the float 12.

Reference numeral 13 is a communication passage provided between the opposing main passages 14 and 14 in which a gear pump 15 is arranged. The shaft 17 of the rotor 16 of the gear pump 15 projects outward from the rear surface of the main body 1. The input / output shaft 18 is formed.

The main body 1 includes main flow paths 14, 14 facing each other.
Are vertically arranged, and both end flow paths 6 and 6 are vertically arranged so as to be at left and right positions, and the main flow paths 14 and 1 at the upper part of the main body 1 are disposed.
4 is set to be a pressure reducing side flow path by the gear pump 15.

Numerals 19 and 19 are air chambers provided at the upper edge of the upper main channel 14 of the main body 1 and at symmetrical positions of the lower main channel 14, and the main channels of the main body 1 are directed toward the air chambers 19 and 19. 14, 14 are formed in an inclined shape.

The embodiment of the drawings shows a case where the torque limiter of the present invention is incorporated in an automatic closing mechanism of a sliding door and is used for speed reduction and control of the sliding door, and the main body 1 is fixed to the upper part of the sliding door A. The pinion 20 attached to the input / output shaft 18 is the rack 2 provided on the closed side of the Kamoi B.
It is designed to be meshed with 1.

Of course, the torque limiter of the present invention may be used not only for speed reduction and control of the sliding door but also for speed reduction of other devices.

[0032]

As described above, the present invention utilizes the flow of oil enclosed in the endless closed passage of the main body, and outputs the rotational force input to the input / output shaft by controlling the resistance of the oil. It is possible and its structure is extremely simple.

Further, the flow passages at one end of the closed flow passages are arranged side by side in the direction of a gap in the left-right direction, and the flow rate adjusting valve is incorporated in the through-flow passage formed between the parallel flow passages, whereby the main body side An operating unit can be installed outside the unit, and the external operation unit can be used to adjust the flow rate of the oil flowing through the closed flow path, making it possible to control the rotation output of the input / output shaft. It is possible to make more accurate adjustments according to the situation.

Moreover, by arranging the opposing main flow passages at the upper and lower positions and setting the main flow passage located at the upper part of the main body to be the pressure reducing side flow passage by the gear pump, the influence of air contained in the oil is exerted. Can be operated in a small state.

Further, the air contained in the oil in the upper main channel is converged in the air chamber provided at the upper edge of the main channel in the upper part of the main body, so that the reaction state of the oil is ensured.

Since the main flow passage in the upper part of the main body is inclined toward the air chamber, the air contained in the oil in the upper main flow passage is easily guided to the air chamber and eliminated from the main flow passage. Of.

Since the check valve is incorporated in the flow path at the other end of the main body, the rotational output of the input / output shaft can be controlled only when the rotational input is made in one direction to the input / output shaft. Rotation in the other direction is free.For example, as in the braking device of the automatic closing mechanism of the sliding door, the movement of the door body in the opening direction can be performed rapidly and the movement in the closing direction must be slow. It can be conveniently used for something.

Since the check valve can change direction, the air chambers are symmetrically provided in each of the main flow paths, and the main flow paths are inclined toward the air chambers, the check valve By reversing the oil control direction and reversing the body to the left and right, it is possible to deal with the reverse rotation input to the input / output shaft. For example, in the case of a sliding door that can be opened or closed in either the left or right direction. It can be used.

[Brief description of drawings]

FIG. 1 is a front view of a main body with a lid removed.

FIG. 2 is a rear view of the main body.

FIG. 3 is a plan view of the main body.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a schematic explanatory view of a usage state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Closed flow path 5 Through flow path 6,6 Flow path at one end 7 Operation part 8 Flow control valve 9 Check valve 10 Flow path at the other end 13 Communication flow path 14, 14 Main flow path 15 Gear pump 16 Rotor 17 Shaft 18 Input / Output Shaft 19, 19 Air Chamber

Claims (6)

[Claims] 1. A horizontally elongated flat main body (1), an endless closed channel (2) formed in the main body (1) and containing oil, and a flow at one end of the main body (1). Road (6)
(6) are arranged side by side in a lateral direction in a distorted manner, and are incorporated in the through flow passage (5) and the through flow passage (5) formed between the parallel flow passages (6) and (6), and the main body (1 ) Is incorporated in a flow rate adjusting valve (8) provided with an operating portion (7) on the outside of the side and a flow passage (10) at the other end of the main body (1) to limit the flow of oil in one direction. Main flow path (14) facing check valve (9)
The communication passage (13) provided between (14) and in which the gear pump (15) is arranged, and the shaft (17) of the rotor (16) of the gear pump (15) are arranged outside the rear surface of the main body (1). A torque limiter including an input / output shaft (18) formed so as to project in one direction. 2. A horizontally elongated flat main body (1), an endless closed channel (2) formed in the main body (1) and filled with oil, and a flow at one end of the main body (1). A flow rate adjusting valve (8) incorporated in the passage (6) and provided with an operating portion (7) outside the main body (1), and a flow passage (1) at the other end of the main body (1).
0), which is provided between the check valve (9) that restricts the oil flow in one direction and the main flow paths (14) (14) facing each other, and the communication flow in which the gear pump (15) is arranged. Road (1
3) and the shaft (1) of the rotor (16) of the gear pump (15)
7) and an input / output shaft (18) formed by projecting outward from the rear surface of the main body (1), and opposing main flow paths (14) (1)
4) is located vertically, and the main body (1) is arranged vertically so that both end flow passages (6) (10) are in the left and right positions, and the main flow passage (14) above the main body (1) is Gear pumps (15)
Torque limiter set so that the flow path on the pressure reducing side is set. 3. A flow path (6) at one end of the body (1)
(6) are arranged side by side in the direction of a gap in the left-right direction, a through-flow passage (5) is formed between the parallel flow passages (6) and (6), and the operation portion (7) is provided outside the side of the main body (1). 3. The torque limiter according to claim 2, wherein a flow rate adjusting valve (8) provided with (4) is incorporated. 4. The torque limiter according to claim 2 or 3, wherein an air chamber (19) (19) is provided at the upper edge of the main flow path (14) above the main body (1). 5. The main flow path (14) at the top of the body (1) comprises:
The torque limiter according to claim 4, wherein the torque limiter is inclined toward the air chambers (19) (19). 6. The non-return valve (9) is directional, and air chambers (19) (19) are symmetrically provided in each of the main flow paths (14), and the main flow paths (14) (14) are Air chamber (19)
The inclined surface is inclined toward (19).
Torque limiter described.