JPS6142163Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic governor used primarily in a vehicle automatic transmission to obtain governor pressure in accordance with vehicle speed.

Conventionally, this type of governor has a rotatable governor housing with a valve bore and a weight bore, a governor valve is inserted into the valve bore, and a weight is housed in the weight bore to reduce the centrifugal force acting on the weight. It is known that the centrifugal force, that is, the governor pressure corresponding to the rotational speed of the housing can be obtained by applying the governor pressure to the valve through a connecting rod. Although it is possible to obtain governor pressure characteristics of It will be done.

The purpose of the present invention is to provide a governor that satisfies such demands.As illustrated in the drawings, a rotatable governor housing 1 is provided with a valve bore 2 and a weight bore 3.
At the same time, a governor valve 4 is inserted into the body, a weight is accommodated in the weight bore 3, and the centrifugal force acting on the weight is applied to the valve 4 through the connecting rod 6, and the centrifugal force is applied to the valve 4 by the valve 4. In a hydraulic governor capable of obtaining a corresponding governor pressure, three weights, first to third, are prepared, and the first weight 5a is formed into an annular shape to be fitted into the inner peripheral surface of the weight bore 3. The connecting rod 6 is inserted into the inner peripheral space, and a second weight 5b on the inside in the direction of action of centrifugal force and a third weight 5c on the outside are placed between the connecting rod 6 and the first weight 5a. Insert, third weight 5c
is secured outwardly in the direction of action of centrifugal force with respect to the connecting rod 6, and the first weight 5a is attached to the third weight 5c.
and the second weight 5b through springs 7 and 8, respectively, and the first weight 5a is moved outward in the direction in which the centrifugal force acts. The first stopper 9 restricts the stroke to a constant stroke, and the second stopper 10, which is provided on the second weight 5b, prevents the second weight 5b from moving outward in the direction of action of the centrifugal force by contacting the first weight 5a. It is characterized in that it is regulated by a constant stroke.

In the illustrated case, the housing 1 is rotatably supported by a governor holder 12 in a governor shaft 11 to which the housing 1 is integrally assembled, and a gear 14 is engaged with a key 13 at the end of the shaft 11.
For example, a gear interlocked with the output shaft of a transmission is engaged with the housing 1 to provide rotation corresponding to the interlocking speed.

The governor valve 4 is composed of a spool valve that is integral with the connecting rod 6 and extends in the direction opposite to the direction of action of centrifugal force, that is, to the left in the drawing. An inflow port 2a on the right side leading to an oil supply port 16 formed in the governor holder 12 through a shaft hole 15, and a hydraulic outlet 18 at the shaft end of the governor shaft 11 through a pipe 17 inserted into the shaft hole 15. The valve 4 has a first land 4a that opens the inflow port 2a when the valve 4 moves to the right, and a drain port 2c that opens the drain port 2c when the valve 4 moves to the left. A second land 4b that opens is formed, and a right pressure receiving surface that receives the hydraulic pressure in the outflow port 2b is formed on the second land 4b,
The balance between the pressing force to the right in the drawing due to the centrifugal force of the weights 5a, 5b, and 5c and the pressing force to the left due to the hydraulic pressure via the pressure receiving surface, the governor pressure according to the centrifugal force. was obtained at the outflow port 2b.

The springs 7, 8 are provided in an annular gap on the outer periphery of the connecting rod 6 between the first and second weights 5a, 5b and the third weight 5c, and are provided in double layers in the radial direction, inside and outside. Both springs 7 and 8
For positioning and prevention of interference, a spring guide 19 is integrally provided on one of these weights 5a, 5b, and 5c as shown in FIGS. 1 to 3.

Further, the first stopper 9 is constituted by a circlip fitted into the weight bore 3, and the second stopper 10 is in contact with the inner end surface of the first weight 5a in the direction of action of the centrifugal force, that is, the left end surface. The third weight 5c is configured with a flange on the outer periphery of the left end of the second weight 5b that is in contact with the second weight 5b, and the third weight 5c is prevented from coming out outward in the direction of action of centrifugal force, that is, to the right, by a circlip 20 fitted to the connecting rod 6. I made it so that it would be done.

The illustrated one is provided with a third stopper 21 consisting of a circlip fitted to the inner periphery of the right end of the first weight 5a, so as to restrict rightward movement of the third weight 5c due to centrifugal force at a constant stroke. .

Next, to explain its operation, the housing 1
During low-speed rotation, the centrifugal force acting on the first weight 5a and the second weight 5b moves to the right due to centrifugal force until it comes into contact with the first stopper 9. respectively spring 7,
The centrifugal force of these three weights 5a, 5b, 5c, including the centrifugal force acting on the third weight 5c itself, is applied to the governor valve 4 through the governor valve 4. , the characteristics of part a of the governor pressure characteristics shown in FIG. 4 are created. During medium speed rotation, the contact of the first weight 5a with the first stopper 9 cuts off further action of centrifugal force, and the second weight 5b and the first weight increase as the rotational speed increases. The characteristics of part b in Fig. 4 are created by centrifugal force with the three weights 5c.

Then, when the second weight 5b moves to the right as the number of rotations increases and causes the second stopper 10 to come into contact with the first weight 5a, at higher speed rotation, the number of rotations increases as the number of rotations increases. Only the centrifugal force of the third weight 5c acts, and the characteristics of part c in FIG. 4 are created.

As described above, according to the present invention, three-stage governor pressure characteristics can be obtained by the three first to third weights 5a, 5b, and 5c.
a, 5b, and 5c are reliably supported by each other between the weight bore 3 and the connecting rod 6, so that movement in the direction of action of centrifugal force is reliably guided, and the governor pressure characteristics as set can be obtained. .

[Brief explanation of the drawing]

Figure 1 is a cutaway side view of an example of the proposed governor;
3 and 3 are respectively cut-away side views of essential parts of the modified example, and FIG. 4 is a diagram showing the governor pressure characteristics of the governor of the present invention. 1... Governor housing, 2... Valve bore,
3... Weight bore, 4... Governor valve, 5a
...First weight, 5b...Second weight, 5c
...Third weight, 6...Continuous rod, 7,8...Spring, 9...First stopper, 10...Second stopper.

Claims (1)

[Scope of utility model registration request] Valve bore 2 in rotatable governor housing 1
A governor valve 4 is fitted into the valve bore 2, and a weight is accommodated in the weight bore 3, so that the centrifugal force acting on the weight is transferred to the valve 4 via a connecting rod 6. In this hydraulic governor, three weights, first to third, are prepared, and the first weight 5a is attached to the weight bore 3. The connecting rod 6 is formed into an annular shape to be inserted into the inner circumferential surface of the ring, and the connecting rod 6 is inserted into the inner peripheral space of the connecting rod 6. Insert the weight 5b and the outer third weight 5c, and
is secured outwardly in the direction of action of centrifugal force with respect to the connecting rod 6, and the first weight 5a is attached to the third weight 5c.
and the second weight 5b through springs 7 and 8, respectively, and the first weight 5a is moved outward in the direction in which the centrifugal force acts. The first stopper 9 restricts the stroke to a constant stroke, and the second stopper 10, which is provided on the second weight 5b, prevents the second weight 5b from moving outward in the direction of action of the centrifugal force by contacting the first weight 5a. A hydraulic governor characterized by regulating the stroke at a constant stroke.