JP4353397B2 - Externally controlled fan coupling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention generally relates to an externally controlled fan coupling device that controls the rotation of a fan for cooling an engine in an automobile or the like by following a change in temperature or rotation around the outside.
[0002]
[Prior art]
Conventionally, as this type of fan coupling device, the inside of a seal box made up of a case and a cover is divided into an oil sump chamber and a torque transmission chamber that houses a drive disk by a partition plate having an oil supply adjustment hole. A dam is connected to a part of the inner peripheral wall on the sealer side facing the outer peripheral wall of the drive disk where oil is collected during rotation, and communicated with the oil reservoir from the torque transmission chamber side. A drive disk is provided that forms a circulation flow passage and opens a supply adjustment hole of the partition plate when the ambient temperature exceeds a set value, and closes the supply adjustment hole of the partition plate below the set value. And increasing the effective contact area of the oil in the torque transmission gap provided on the opposite wall surface near the outside of the sealer cage, and controlling the torque transmission from the drive side to the driven sealer cage side In the front side of the seal box or Provided with a pair of electromagnets on the surface side, a magnetic valve member that opens and closes the supply adjustment hole facing one of the electromagnets, and a magnetic subvalve that opens and closes the circulation flow passage facing the other electromagnet There is one provided with a member (see Japanese Patent No. 2911623).
[0003]
However, such a conventional externally controlled fan coupling device is generally controlled mainly by electric control, so the mechanism is complicated, consumes power, is expensive, and the electric system has failed. In such a case, there is a disadvantage that the hydraulic oil does not circulate and the fan coupling device is damaged. However, the externally controlled fan and coupling device has the advantages that the control factors such as water temperature, engine speed, and auxiliary equipment such as air conditioners can be selected arbitrarily, and that appropriate fan control can be performed. Improvements to eliminate the problem were desired.
[0004]
Therefore, in view of the present situation, the present inventors have a simple mechanism, can save power consumption, and have a function of safety on (the hydraulic oil circulates without stopping even if the electric system fails). In addition, an externally controlled fan coupling device that can control the rotation of the fan arbitrarily and accurately by adjusting the oil amount with high accuracy according to various operating conditions has been previously proposed (Japanese Patent Application Laid-Open (JP-A)). JP 2002-13556 A and JP 2002-81466 A).
This externally controlled fan and coupling device basically uses a non-excited electromagnet that uses a permanent magnet for the valve member that opens and closes the oil supply adjustment hole that supplies hydraulic oil from the oil reservoir chamber to the torque transmission chamber. The control system employs a control system, for example, a structure made of a non-magnetic material supported via a bearing on a rotating shaft having a drive disk fixed to the tip, and a cover attached to the case. The interior of the seal box is divided into an oil reservoir chamber and a torque transmission chamber that houses the drive disk by a partition plate having an oil supply adjustment hole, and the drive disk that collects oil during rotation is divided. A dam and a circulation flow passage from the torque transmission chamber side to the oil reservoir chamber are formed in a part of the inner peripheral wall surface on the side of the sealer flange facing the outer peripheral wall, and the oil supply adjustment hole is opened and closed. Equipped with a valve member in the oil sump chamber In the fan coupling device configured to control the rotational torque transmission from the driving side to the driven side by increasing / decreasing the effective contact area of the oil in the torque transmission gap formed by the driving side and the driven side, A non-excited electromagnet using a permanent magnet is supported on the rotary shaft body through a bearing on the oil reservoir chamber side of the sealer bowl, and the valve member composed of an armature (magnetic body piece) and a leaf spring is operated by the electromagnet. It is a mechanism that controls the opening and closing of the oil supply adjustment hole, and has a double valve structure in which a plurality of the oil supply adjustment holes are provided and a valve member is provided for each oil supply adjustment hole. is there.
[0005]
In this externally controlled fan and coupling device, the valve member open / close control mechanism that uses a non-excited electromagnet that uses a permanent magnet to control the oil supply adjustment hole is generally the same principle as a non-excited valve The principle is that if a current is passed through the electromagnet so as to generate a magnetic field opposite to the magnetic field created by the permanent magnet, the magnetic field of the permanent magnet will be canceled, and the attractive force of the permanent magnet disappears, and the valve member The oil supply adjustment hole is closed by pressing against the partition plate side by the action of the spring. On the other hand, when the electromagnet is turned off, the valve member is attracted to the permanent magnet side against the spring to open the oil supply adjustment hole. It became a mechanism.
Also, by supplying a current to the electromagnet so that a magnetic field in the same direction as the magnetic field generated by the permanent magnet is generated, the oil supply hole can be opened instantaneously by the synergistic effect of the attraction force of the permanent magnet and the attraction force of the electromagnet. it can.
Therefore, when this open / close control mechanism is used, even if the electromagnet is turned off due to a failure in the electrical system, the safety is turned on, that is, the state in which the oil supply adjustment hole provided in the partition plate is kept open. Circulates, the fan coupling device is turned on, the fan continues to rotate, and engine damage due to overheating can be prevented.
In addition, when a double valve structure is provided by providing multiple oil supply adjustment holes, each valve can be opened and closed in stages by changing the magnitude of the current applied to the electromagnet in stages, thereby rotating the fan. Can be raised in steps, or the rate of rise can be changed.
The reason for making the case material non-magnetic is to prevent leakage of magnetic flux.
[0006]
[Problems to be solved by the invention]
However, the above-described conventional externally controlled fan coupling device has the following problems.
(1) Since the conventional externally controlled fan / coupling device controls only the oil supply port, it is necessary to balance the supply and recovery of oil in order to output a constant torque. Is extremely difficult.
(2) If the setting of the electromagnet is set to require electric power when the coupling device is turned on, the electric power must be supplied so that the valve is always opened and closed or stays at a fixed position in order to output torque other than OFF. What you have to keep on.
(3) When creating a state other than OFF or ON of the coupling device, the oil supply valve must always be repeatedly opened and closed, which may cause a problem with the durability of the leaf spring of the valve member.
(4) Since the electromagnet and armature that actuate the valve member are separated by a non-magnetic case, the magnetic field cancellation efficiency is poor, and the fan and coupling device cannot be reduced in size and weight. .
[0007]
The present invention has been made to solve the above-described problems of the conventional externally controlled fan coupling device, and is an externally controlled fan coupling device that improves fan rotation controllability and saves power. Is to provide.
[0008]
[Means for Solving the Problems]
An externally controlled fan / coupling device according to the present invention includes a non-magnetic case supported via a bearing and a cover attached to the case on a rotating shaft having a drive disk fixed to the tip. The inside of the sealer chamber is divided into an oil reservoir chamber and a torque transmission chamber in which the drive disk is built by a partition plate, and a cover facing the outer peripheral wall of the drive disk where oil is collected during rotation. A dam is formed in a part of the inner peripheral wall surface, and an oil circulation flow passage is formed between the torque transmission chamber side and the oil reservoir chamber, and a valve member for opening and closing the oil circulation flow passage is provided in the oil reservoir chamber, The valve member is composed of an armature and a leaf spring. A non-excited electromagnet using a permanent magnet is supported on the oil reservoir chamber side of the sealer bowl via a bearing on the rotating shaft body, and the valve member is supported by the electromagnet. Mechanism to control the opening and closing of the oil circulation passage by operating None, in a fan / coupling device configured to control rotational torque transmission from the drive side to the driven side by increasing or decreasing the effective oil contact area in the torque transmission gap between the driving side and the driven side And forming an oil supply circulation flow passage from the oil reservoir chamber side to the torque transmission chamber and an oil recovery circulation flow passage from the torque transmission chamber side to the oil reservoir chamber in the case. The valve member for opening and closing the passage is coaxially provided in the oil sump chamber, and the two valve members are individually controlled to be opened and closed. In addition, a ring-shaped magnetic body for efficiently transmitting the magnetic flux of the non-excited electromagnet to the armature of each valve member is incorporated in the case.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a longitudinal sectional view showing an embodiment of an externally controlled fan / coupling device having a double valve structure according to the present invention. FIGS. 2 to 5 show valve operation examples of the above device. The state where the oil supply and recovery valve is closed and all the oil is recovered in the oil sump chamber (the device is in the OFF state), FIGS. 3 and 4 are the state where the device is held at a certain torque, FIG. Is the state where only the oil supply valve is open and the amount of oil required for torque is supplied to the torque transmission chamber. Fig. 4 shows that the oil supply and recovery valves are closed and the constant torque is maintained by the oil supplied to the torque transmission chamber. FIG. 5 is a schematic view showing a state where only the oil recovery valve is opened and all the oil in the torque transmission chamber is recovered in the oil reservoir chamber. 1 is a rotating shaft body (drive shaft), 2 is a seal Equipment 2-1 is a case, 2-2 is a cover, 3 is a drive disk, 4 is a partition plate, 5 is an oil sump , 6 is a torque transmission chamber, 7 is a circulation flow passage for oil recovery, 8 is a circulation flow passage for oil supply, 9-1 is a valve member for oil supply, 9-2 is a valve member for oil recovery, 9-1a, 9 -2a leaf spring, 9-1b, 9-2b is armature, the permanent magnets 10, 11 - magnetic loop elementary DOO, 12 electromagnets, 13 electromagnet support 14, 15 bearing, 16 oil, 17 is a dam.
[0010]
That is, the externally controlled fan / coupling device shown in FIG. 1 has a rotating shaft body (driving shaft) 1 that is rotated by driving of a driving portion (engine), a case 2-1 and a cover 2-2 via a bearing 14. A sealer cage 2 comprising the following is supported, and the interior of the sealer cage 2 is divided by a partition plate 4 into an oil reservoir chamber 5 and a torque transmission chamber 6. The drive disk 3 fixed to the tip is housed so that a torque transmission gap is formed between the inner surface of the torque transmission chamber.
The dam 17 is provided on a part of the inner peripheral wall surface of the cover 2-2 facing the outer peripheral wall portion of the drive disk 3 where oil is collected during rotation.
[0011]
The oil supply valve member 9-1 and the oil recovery valve member 9-2 that open and close the oil recovery circulation passage 7 and the oil supply circulation passage 8 provided in the case 2-1 are respectively plate springs 9- 1a, 9-2a and armatures 9-1b, 9-2b. In order to make it difficult for the oil in the oil sump chamber 5 to receive resistance during rotation of the fan, the armatures 9-1b, 9-2b of the valve members are The base ends of the leaf springs 9-1a and 9-2a are attached to the case 2-1 so as to be positioned in the vicinity of the rotary shaft body (drive shaft) 1.
[0012]
On the drive unit side of the sealer cage 2, an electromagnet 12 is supported on an electromagnet support 13 supported on a rotary shaft 1 via a bearing 15, and a ring-shaped magnetic loop element incorporated in a case 2-1. the permanent magnets 10 forming the the sheet 1 1 1 the electromagnet 12 and the pair each valve member of the armature 9-1b, is mounted opposite the 9-2b. The electromagnet 12 is part of the electromagnet support 13 as shown is fitted uneven magnetic loop elementary sheet 1 1 1, also the permanent magnet 10 is formed on the back surface side of the magnetic loop elementary sheet 1 1- 1 is housed in the recess 11- 1 a. That is, to convey the magnetic flux of the electromagnet 12 to the armature efficiently each valve member, constitutes the actuating mechanism of each valve member 9-1 and 9-2 by using the magnetic loop elementary sheet 1 1 1 of the ring .
Therefore, in the case of this operating mechanism, when an electric current is passed through the electromagnet 11 so that a magnetic field opposite to the magnetic field generated by the permanent magnet 10 is generated, the magnetic force of the permanent magnet 10 is canceled to thereby attract the attracting force of the permanent magnet 10. There disappeared, armature 9-1b of each valve member 9-1 and 9-2, 9-2b is the plate springs 9-1a, by away from the magnetic loops elementary sheet 1 1-1 by the action of 9-2a When the oil recovery circulation flow passage 7 and the oil supply circulation flow passage 8 are opened and the electromagnet 11 is turned off, the armatures 9-1b and 9-2b are moved by the attraction force of the permanent magnet 10 to the leaf springs 9-1a, by being attracted to the magnetic loop elementary sheet 1 1-1 side against the 9-2a, the plate springs 9-1a, 9-2a is pressed against the casing 2-1 side oil recovery circulating passage 7 And circulation for oil supply 8 is closed.
In the present invention, a system in which the two valve members are individually controlled to be opened and closed is employed. The oil supply valve member 9-1 and the oil recovery valve member 9-2 are configured to have a current flowing through the electromagnets 11 respectively. Opening and closing is controlled separately by changing the direction.
[0013]
In the fan / coupling device having the above-described configuration, the two valves of the oil supply valve member 9-1 and the oil recovery valve member 9-2 are set to voltages OV (OFF), +12 V (ON), and -12 V (ON). When the power supply voltage is set to OV (OFF) and the oil supply valve member 9-1 and the oil recovery valve member 9-2 are both closed by the method of opening / closing control by switching two patterns, the oil 16 is stored in the oil reservoir chamber 5. All the data is collected and the apparatus is turned off (FIG. 2). Next, the power supply voltage is set to +12 V (ON), the oil supply valve member 9-1 is opened, the oil recovery valve member 9-2 is closed, and the amount of oil necessary for torque is supplied to the torque transmission chamber 6. Thus, a certain torque is maintained (FIG. 3). Further, by closing the oil supply valve member 9-1 and the oil recovery valve member 9-2 with the power supply voltage set to OV (OFF), a constant torque is maintained by the oil 16 supplied to the torque transmission chamber 6. (FIG. 4). Further, the power supply voltage is set to -12 V (ON), the oil recovery valve member 9-2 is opened, the oil supply valve member 9-1 is closed, and all the oil 16 in the torque transmission chamber 6 is in the oil reservoir chamber 5. In this case, the device OFF state is maintained (FIG. 5). Furthermore, the power supply voltage is set to OV (OFF), the oil supply valve member 9-1 and the oil recovery valve member 9-2 are both closed, and the state where all the oil 16 is recovered in the oil reservoir 5 is maintained. Thus, the device OFF state is maintained (FIG. 6). 12V is the same voltage as the battery voltage.
[0014]
【The invention's effect】
As described above, the externally controlled fan / coupling device according to the present invention includes two valves, an oil supply port from the oil reservoir chamber to the torque transmission chamber and an oil recovery port from the torque transmission chamber to the oil reservoir chamber. By adopting a separate open / close control system, the oil required for fan rotation torque can be supplied with the recovery valve closed, so stable torque can be obtained and acceleration can be achieved if this state is maintained. Overshoot at the time can be prevented, fan rotation controllability can be improved, and power is required only when the valves are opened (only when oil is supplied / recovered). Electricity can be used. In addition, a magnetic body that efficiently transmits the magnetic flux of the electromagnet to the armature is provided in the non-magnetic case, resulting in better magnetic field cancellation efficiency and a smaller and lighter fan / coupling device. Has the effect of peeling off.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of an externally controlled fan / coupling device according to the present invention.
FIG. 2 is a schematic diagram showing a state in which the oil supply and recovery valve is closed and all the oil is recovered in the oil reservoir chamber (the same device is in an OFF state) in the valve operation example of the apparatus shown in FIG. 1;
FIG. 3 is a schematic view showing a state where only the oil supply valve is opened and the amount of oil necessary for torque is supplied to the torque transmission chamber in the valve operation example of the apparatus shown in FIG. 1;
4 is a schematic view showing a state where the oil supply / recovery valve is closed and a constant torque is maintained by the oil supplied to the torque transmission chamber in the valve operation example of the apparatus shown in FIG. 1; FIG.
5 is a schematic view showing a state in which only the oil recovery valve is opened and all the oil in the torque transmission chamber is recovered in the oil reservoir chamber in the valve operation example of the apparatus shown in FIG.
6 is a schematic view showing a state where the oil supply / recovery valve is closed and all the oil is recovered in the oil sump chamber in the valve operation example of the apparatus shown in FIG.
[Explanation of symbols]
1 Rotating shaft (drive shaft)
2 Sealing device 2-1 Case 2-2 Cover 3 Drive disk 4 Partition plate 5 Oil reservoir chamber 6 Torque transmission chamber 7 Oil recovery circulation passage 8 Oil supply circulation passage 9-1 Oil supply valve member 9- 2 oil recovery valve member 9-1a, 9-2a plate spring 9-1b, 9-2b armature 10 permanent magnets 11-1 magnetic loops elementary preparative 12 electromagnet 13 electromagnet support 14, 15 bearing 16 oil 17 dam

Claims (2)

An oil reservoir chamber is formed by a partition plate between the inside of a seal box made up of a non-magnetic case supported via a bearing and a cover attached to the case on a rotating shaft having a drive disk fixed to the tip. And a torque transmission chamber that houses the drive disk, and a dam is connected to a part of the inner peripheral wall surface of the cover that faces the outer peripheral wall portion of the drive disk where oil is collected during rotation. An oil circulation flow passage is formed between the torque transmission chamber side and the oil reservoir chamber, and a valve member that opens and closes the oil circulation flow passage is provided in the oil reservoir chamber, and the valve member includes an armature and a leaf spring, and the sealer There is no mechanism to support a non-excited electromagnet using a permanent magnet on the oil reservoir chamber side of the soot through a bearing on the rotating shaft body and to operate the valve member by the electromagnet to control the opening and closing of the oil circulation passage. The torque transmission gap between the drive side and the driven side In the fan coupling device that controls the rotational torque transmission from the drive side to the driven side by increasing / decreasing the effective contact area of oil, for supplying oil to the case from the oil reservoir chamber side to the torque transmission chamber A circulation flow passage and an oil recovery circulation flow passage leading from the torque transmission chamber side to the oil reservoir chamber are formed, and the valve member for opening and closing the passage for each circulation flow passage is provided coaxially in the oil sump chamber, An externally controlled fan / coupling device, wherein the two valve members are individually controlled to be opened and closed. The externally controlled fan according to claim 1, wherein a ring-shaped magnetic body for efficiently transmitting the magnetic flux of the non-excited electromagnet to the armature of each valve member is incorporated in the case. Coupling device.

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