JPS6226928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission clutch mechanism for an automobile water pump and fan, and more specifically,
This relates to the configuration of the clutch function between the fan and rotor of the water pump.

In the water-cooled engine cooling method, a fluid coupling or an electromagnetic clutch has conventionally been used as a fan coupling for a fan disposed on the shaft of a water pump.
Many systems have been adopted that control the rotation of a fan by sensing the temperature of air passing through a radiator or cooling water.

However, in all conventional systems, the fan is forced to rotate several hundred revolutions even when the engine is idling due to the drag torque of the bearing interposed between the drive input source and the pump shaft. was.

This has the negative effect of reducing the efficiency of the heater in cold weather.

In the present invention, when the above-mentioned cooling water temperature is low, the rotation of the fan and the rotation of the water pump are stopped, thereby eliminating the above-mentioned adverse effects, improving heater efficiency, and improving fuel efficiency. It provides a power transmission mechanism to the water pump and fan that contributes to reducing horsepower.

The invention will now be explained with reference to the figures.

1 is a pump housing, which is fixed to the engine side by appropriate means (not shown); 2 is a pump shaft rotatably supported within the pump housing 1; 3 is an impeller fixed to the pump shaft 2 via a base 4, and 5 is connected to the pump housing 1 on one side.
This is a mechanical seal member disposed on the pump shaft 2 between the pump shaft 2 and the base portion 4 of the impeller 3.

Reference numeral 6 denotes a rotor, which has a V-pulley 7 that is integrally formed or integrally formed by welding, etc., and is connected to an auxiliary seat 8 tightly fitted onto the pump shaft 2, and a ball bearing 9 disposed on the auxiliary seat 8. , is arranged rotatably with respect to the pump shaft 2. Note that the sliding torque between the mechanical seal member 5 and the pump shaft 2 is greater than the drag torque of the ball bearing 9.

Reference numeral 10 denotes an electromagnetic coil, which is supported within the rotor 6 by an appropriate number of support members 11 attached to the pump housing 1 with screws 12.

Reference numeral 13 denotes a fan seat, which is tightly fitted onto the pump shaft 2 with its right side base surface in contact with the inner race of the ball bearing 8 as seen in the figure.
are screwed together with an appropriate number of bolts 15.

The fan 16 is fixed to the fan mounting plate 14 by a suitable number of caulking members 17, and rotates integrally with the fan seat 13, that is, the pump shaft 2.

Reference numeral 18 denotes a leaf spring, with one end of the leaf spring being biased toward the fan (to the left in the figure), the base is fixed to the fan sheet 13 at an appropriate position with a caulking pin 19; Said leaf spring 1
8, the armature 20 is fixed with an appropriate number of fixing pins 21.

In addition, 22 is a power supply, 23 is a thermostat, 2
Reference numeral 4 indicates wiring, and in the figure, the arrow line indicated by the symbol A indicates a magnetic circuit.

In addition, in the illustrated state (the thermostat 22 is
OFF), amateur 20 has leaf spring 1
Due to the accumulated force of 8, it is separated from the rotor 6.

The water pump according to the present invention is constructed as described above, and its effects will be described below.

When the cooling water temperature is low in cold weather (below the temperature set by thermostat 23, i.e. OFF state)
The V-pulley 9, which is driven by a belt from the engine, and the integrated rotor rotate together with the engine, but as shown in the drawings and described above, the rotor 6 and the armature 20 are separated from each other, and the drag of the ball bearing 9 Since the sliding torque between the mechanical seal member 5 and the pump shaft 2 is greater than the torque, the pump shaft 2 does not rotate.

Therefore, neither the fan 16 nor the pump impeller 3 rotate.

This prevents the cooling water from heating or cooling.

Next, the cooling water warms up and the water temperature rises,
The preset operating temperature value of the thermostat, i.e.
When the temperature reaches a temperature suitably lower than the temperature that causes local heating of the engine, the voltage from the power source 22 turns on the thermostat 23 and is applied to the electromagnetic coil 10 to create a magnetic circuit as indicated by the arrow A.

Therefore, the armature 20, which is fixed to one end of the leaf spring 18 and whose base is fixed to the fan seat 13, is attracted to the rotor 6 against the accumulated force of the leaf spring.

As a result, the engine rotates the fan 16 via the rotor 6, the armature 20, the leaf spring 18, and the fan seat 13, and in conjunction with the fan 16, the pump shaft 2 and impeller 3 simultaneously rotate, which is the original function of the water pump. function operation starts.

As mentioned above, the power transmission mechanism to the water pump and fan of the present invention, when the cooling water temperature is low,
Since the rotation of the fan is completely stopped, and the rotation of the water pump itself is also stopped, it is possible to improve the efficiency of the heater in cold weather, and it is also expected to improve fuel efficiency by reducing the shaft horsepower as described above.
With a simple configuration, the deficiencies of conventional systems can be easily overcome.

[Brief explanation of the drawing]

The figure is a central cross-sectional view of a power transmission mechanism to a water pump and a fan according to the present invention. 1...Pump housing, 2...Pump shaft, 3
... Impeller, 5 ... Mechanical seal member, 6
... Rotor, 7 ... V pulley, 8 ... Auxiliary seat, 9 ... Ball bearing, 10 ... Electromagnetic coil, 13 ... Seat for fan, 16 ... Fan,
18... leaf spring, 20... amateur, 23...
thermostat.

Claims (1)

[Claims] 1. A fan seat having a seat closely fitted to one side of the pump shaft and a fan fixed thereto, a rotor having a built-in electromagnetic coil rotatably disposed on the seat via a bearing, and the fan seat An elastic member having an armature and storing energy is fixed to one side, and a mechanical seal having a sliding torque larger than the drag torque of the bearing is disposed on the other side of the pump shaft, and a mechanical seal having a sliding torque larger than the drag torque of the bearing is installed on the other side of the pump shaft. A power transmission mechanism for an automobile water pump and fan that rotates or stops the pump shaft by moving an armature toward and away from the rotor depending on whether voltage is applied or not.