JPS6124578B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in displacement regulating devices used in automobile engine mount systems.

Generally, in the case of automobiles, a displacement regulating device D is interposed between a power unit (engine/transmission unit) U, which is a vibrating body, and a vehicle body B, as shown in FIG. U
The displacement is regulated at a certain point. As shown in FIG. 2, this displacement regulating device D consists of a cylindrical first member 1 fixed to the vehicle body B side, one end fixed to the power unit U, and the free end of the first member 1 fixed to the side of the vehicle body B. It consists of an arm-shaped second member 2 arranged in a floating state in the middle, and a force acting on one of the first and second members 1 and 2, for example, the second member 2, is applied to the first member 1 and a predetermined position in the direction of force φ. The stopper lever 3 is fixed with a clearance δ of .

That is, in such a conventional displacement regulating device D, when the power unit U is displaced in the φ direction, the stop lever 3 of the second member 2 comes into pressure contact with the first member 1, and the compressive deformation of the stop lever 3 causes the power to be elastically increased. The displacement of the unit U is regulated.

However, in the case of this conventional device, as shown by line a in FIG. Since displacement is to be restricted by deformation in the compression direction with a high degree of compression, the rise of the stopper characteristic becomes rapid, and as a result, the shock becomes relatively large. Furthermore, when the stop lever 3 presses against one side, for example, the upper side of the first member 1, when the torque of the power unit U suddenly fluctuates, the clearance between the lower part of the stop lever 3 and the lower side of the first member 1 increases. When the stopper lever 3 is pushed back downward by the reaction, the shock becomes large and this rebound movement continues, resulting in a so-called punching phenomenon, which causes vibrations in the vehicle body. Furthermore, when the vehicle is slowly accelerating/decelerating, starting slowly, braking, etc.
When a constant input statically acts on the displacement regulating device D as shown in FIG. 3 _T1 , and the stop lever 3 is pressed against the first member 1, the stop lever
As mentioned above, the vibration of the power unit U is transmitted to the vehicle body side without being attenuated because the rigidity is high, resulting in a problem that a shudder phenomenon is likely to occur.

In view of the conventional situation, the present invention provides a hollow part in the stopper lever, communicates the hollow part with a reservoir via an orifice, and fills the hollow part and the reservoir with working fluid, so that a constant input can be made quiet. In a state in which the actuator is operating, the working fluid can freely flow between the hollow part and the reservoir, and the stopper lever is sheared to a certain extent, resulting in low rigidity and good vibration damping. It is an object of the present invention to provide a displacement regulating device in which the stopper characteristic smoothly rises due to the flow resistance of the working fluid in the orifice to relieve the shock when a large input is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 4, reference numeral 11 indicates a substantially U-shaped first member fixed to the vehicle body B, and reference numeral 12 indicates a second member having one end fixed to the power unit U side and a free end disposed in the middle of the first member 11. In this embodiment, the stop lever 13 is fixed to the first member 11 in the direction of the acting force φ, so that it faces the second member 12 on the upper and lower inner surfaces of the first member 11 with a predetermined clearance δ therebetween. There is. These stopper bars 13, 13 each have hollow parts 14, 14 formed therein, and protrusions 15, 1 facing the hollow parts 14, 14 on the inner surface of the top.
5 is integrally molded. On the other hand, an opening 16 is provided in the upper and lower walls of the first member 1 where the stopper lever is provided,
A connector 18 equipped with an orifice 17 is fixed to this opening 16 by, for example, welding, so that the orifice 1
7 is communicated with the hollow part 14, and further, the upper and lower connectors 18, 18 are connected by a pipe 19 via a bolt member 40 and a nut member 41, and the hollow parts 14, 14 of the upper and lower stop levers 13, 13
are communicating. That is, in the case of this embodiment, when one stopper lever 13 receives an acting force via the second member 12, the hollow part 14 of the other stopper lever 13 functions as the reservoir 20, and these hollow parts 14, The reservoir 20 is filled with working fluid from a working fluid supply port 21 provided in the pipe 19 . Note that the working fluid supply port 21 is closed by the cap 22 after the working fluid is supplied. Also,
The diameter of the orifice 17 of the connector 18 described above is arbitrarily set so that when an input is statically applied to the stopper lever 13, the flow resistance does not become large and the working fluid can freely flow.

Therefore, according to this embodiment device, the first member 1
Due to the relative displacement in the φ direction between 1 and the second member 12,
Either the upper or lower side, for example, the upper stop lever 1
3 statically receives an input through the second member 12, the working fluid in the hollow part 14 of the upper stopper lever 13 flows through the orifice 17, the pipe 19 and the orifice 1 of the lower connector 18.
7 freely flows and is removed to the hollow part 14 side of the lower stopper bar 13 (the hollow part 14 of the lower stopper lever 13 functions as a reservoir 20), and by removing the working fluid in the hollow part 14, The stopper bar 13 deforms in the shearing direction with low rigidity until the projection 15 on the inner surface of the top comes into contact with the connector 18, and therefore the stopper characteristic has a gradual rise in the initial stage as shown by line b in FIG. When the protrusion 15 comes into contact with the connector 18 due to an increase in input, the stopper lever 13 shifts to compressive deformation, and the stopper characteristic rises at this change point (point P in Figure 3), elastically regulating displacement. It is.

In this way, when the input acts statically, the stopper characteristic becomes a gentle two-stage characteristic. When an action, for example, the input indicated by T ₁ in FIG. 3, is applied and one of the upper and lower stopper bars 13 is slightly pressed by the second member 12, the stiffness of the stopper bar 13 decreases because it is in the shear direction deformation region. Since it is in a low state, the slight vibration of the power unit U can be effectively absorbed by the deformation of the stopper lever 13 in the shearing direction, thereby preventing the occurrence of the shedding phenomenon.

On the other hand, when the upper stopper bar 13 receives a large input during sudden acceleration/deceleration, sudden start, sudden braking, etc. of the vehicle, the working fluid in the hollow part 14 of the stopper lever 13 is transferred to the stopper lever 20 (the hollow part of the lower stopper bar 13). 14), due to the fluid resistance caused by the orifices 17, 17 of the connectors 18, 18, the stopper characteristic has a smooth rising characteristic as shown by line C in Fig. Displacement can be regulated. Also, during this large input action,
For example, when the upper stopper lever 13 receives an input as described above, the amount of working fluid flowing into the hollow portion 14 of the lower stopper lever 13 increases as the input increases, and this increase in the inflow amount causes the lower stopper lever 13 tends to bulge and maintain the clearance between it and the lower surface of the second member 12, and as a result, when the second member 12 is rebounded downward by the reaction, the shock becomes larger and a punching phenomenon occurs. The effect can be achieved without any problems.

Although not shown, the upper and lower stopper bars 1
Valve 1 that communicates the hollow parts 14, 14 of 3, 13
9 is abolished to make both hollow parts 14, 14 independent, and hollow parts 14, 14 corresponding to each connector 18, 18 are formed.
A subchamber having a diaphragm for receiving the working fluid therein may be connected.

In the embodiment shown in FIGS. 5 and 6, the stopper lever 23 is
are arranged on the second member 22 side, and in this example, the second member 22 is placed at an appropriate interval in the left-right direction.
It is formed in the shape of a crotch, and a stopper lever 23 is fixedly attached across the two crotches. The stopper bar 23 is divided into upper and lower elements 23a and 23b, and these upper and lower elements 23a and 23b have a dome-shaped rubber 26 on one side of the retainer plates 24a and 24b, respectively, and around the center openings 25a and 25b.
It is constructed by bonding parts a and 26b. Each dome-shaped rubber 26a, 26b has an annular projection 26a', 26b' formed on its outer periphery, which is slightly lower than the top.
These upper and lower elements 23a, 23b are overlapped with a partition plate 27 interposed between them, and the partition plate 27
A hollow part 28 is formed between the retainer plates 24a and 24b, which are separated into two upper and lower chambers.
2 is connected with 35 bolts and nuts. Rubber sheets 29 are adhered to both sides of the partition plate 27 as shown in FIG.
It is designed to ensure the sealability of the clamping portion between the peripheral edge and the retainer plates 24a, 24b, and also to ensure the sealability of the movable plate and the surrounding portion of the communication hole during a large input action, which will be described later. Partition plate 27
There is an orifice pipe 30 that penetrates vertically in approximately the center of the
is fixed thereto, and one or more communicating holes 31 are formed around the orifice tube 30. Flanges 32a and 33 are provided on the upper and lower outer peripheries of the orifice tube 30 on the partition plate 27 side, respectively.
Movable plates 32 and 33 formed by bending a are slidably fitted. The upper movable plate 32 is the orifice tube 3
0 At the end of the rubber sheet 29 extending along the outer circumference, the partition plate 27 surface, specifically the rubber sheet 2
When the internal pressure of the upper chamber 28a suddenly rises, the end of the rubber sheet is bent to open the flange 32.
The a end is pressed against the rubber sheet 29 surface, and the communicating hole 31
Communication with the upper and lower chambers 28a and 28b via the upper and lower chambers 28a and 28b is cut off. In addition, the lower movable plate 33 is positioned at the large diameter portion of the lower end of the orifice pipe 30 to maintain a clearance between it and the lower rubber sheet 29 of the partition plate 27, and is raised when the internal pressure of the lower chamber 28b increases rapidly. The end of the flange 33a is in close contact with the surface of the rubber sheet 29, and similarly blocks communication between the upper and lower chambers 28a and 28b via the communication hole 31. In some cases, as shown in FIG. 8, the orifice tube 30 may be made to be able to slide vertically relative to the partition plate 27, but it may also function if the movable plates 32, 33 are fixed to the orifice tube 30 by welding or the like. There is no difference whatsoever. In addition, in this embodiment, the first member 21 is separated into upper and lower parts, and the elongated holes 21a,
Although the clearance δ with the stopper lever 23 is freely adjustable within the range of 21a and is mounted on the vehicle body B side, the first member 21 may also be U-shaped as shown in FIG. Of course.

Further, the hollow portion 28 of the stop lever 23 is filled with working fluid by appropriate means after the upper and lower elements 23a and 23b are connected.

Next, the operation of the embodiment device having the above configuration will be explained. Due to the relative displacement between the first member 21 and the second member 22, for example, when the upper side of the stopper lever 23 comes into pressure contact with the first member 21 and statically receives an input, the internal pressure of the upper chamber 28a increases slowly, so the upper movable plate 32 remains stationary and the communication hole 31 remains open, the working fluid in the upper chamber 28a freely flows into the lower chamber 28b through the communication hole 31, that is, in this case, the lower chamber 28b It functions as a reservoir 34, and by expelling the working fluid in this upper chamber 28a, the dome-shaped rubber 26a deforms in the shearing direction until the peripheral protrusion 26a' comes into contact with the first member 21, and then the protrusion 26a' comes into contact with the first member 21 and the deformation mode becomes compressive deformation, so that the two-stage stopper characteristic shown by line b in FIG. 3 can be obtained as in the above embodiment, and,
As mentioned above, it is possible to suppress the occurrence of the shudder phenomenon during slow acceleration, slow starting, slow braking, etc.

Further, when a large input is applied during sudden acceleration/deceleration, sudden starting, sudden braking, etc., for example, the upper side of the stop lever 23 comes into pressure contact with the first member 21, and the internal pressure of the upper chamber 28a rises rapidly. Due to the rapid rise, the upper movable plate 32 bends the end of the rubber sheet 29 and moves downward, causing the peripheral flange 32a to close to the partition plate 2.
7 The communication hole 3 is in close contact with the rubber sheet 29 surface on the top surface.
1 to block communication between the upper and lower chambers 28a and 28b. As a result, the working fluid in the upper chamber 28a flows through the orifice pipe 30 and is removed to the lower chamber 28b, and due to the flow resistance of the orifice pipe 30, the stock characteristic changes as shown by the line c in FIG. As shown, the rise characteristic is smooth, and large shocks can be avoided. Furthermore, due to the inflow of the working fluid into the lower chamber 28b side, the lower dome-shaped rubber 26b tends to bulge and maintain the clearance δ with the lower first member 21, so it is exactly the same as in the previous embodiment. It is possible to suppress the punching phenomenon and prevent the occurrence of vehicle body vibration. It should be noted that when the second member 22 operates in the opposite direction to that described above, it functions similarly due to the blocking effect of the communication hole 31 of the lower movable plate 33. In addition, in this embodiment, free flow of the working fluid is performed through the communication hole 31, and the orifice pipe 3
0 is designed to function only to obtain stopper characteristics, which has the advantage that the effective diameter of the orifice tube 30 can be easily set.

As described above, according to the device of the present invention, the stopper function can have a two-stage characteristic when a static input is applied, so even when a certain static input is applied and the stopper lever is slightly pressed, the comparison can be made. It is possible to prevent vibrations by keeping the target rigidity low and efficiently absorbing the vibrations of the vibrating body, and when a large dynamic input is applied, the stopper characteristics can be smoothly raised due to fluid resistance. It is not accompanied by a shock, and can be used for regulating displacement between various vibrating bodies and the vehicle body, including regulating the displacement of an automobile engine mount system, and is highly effective.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the arrangement of a displacement regulating device, Fig. 2 A is a side view showing a conventional device, and Fig. 2 B is a side view showing an arrangement example of a displacement regulating device.
3 is a sectional view taken along the line B-B in the figure, FIG. 3 is a stopper characteristic diagram of the displacement regulating device, and FIG.
FIG. 5 is a cross-sectional explanatory diagram showing the second embodiment of the device of the present invention, FIG. 6 is a cross-sectional diagram taken along the line - in FIG. 5, and FIG. FIG. 8 is a cross-sectional view showing the internal structure of the stopper lever of the embodiment shown in FIG. 8, and FIG. 8 is a cross-sectional view showing a different example of the same structure. 11, 21...first member, 12,22...second member, 13,23...stopper bar, 14,28...
Hollow part, 17, 30... Orifice, 20, 34...
Reservoir, 27...Partition plate, B...Vehicle body, D...
Displacement regulating device, U... vibrating body.

Claims (1)

[Claims] 1. Consists of a first member fixed to the vehicle body and a second member fixed to the vibrating body, and these first and second members
In a displacement regulating device in which a stop lever is disposed on one of the members with a predetermined clearance from the other in the direction of applied force, a hollow portion is formed inside the stop lever, and the hollow portion is connected to a reservoir via an orifice. A displacement regulating device in which these hollow parts and a reservoir are filled with working fluid. 2. A patent in which the hollow part of the stopper bar is divided into two chambers by a partition plate, and these two chambers are communicated with each other by an orifice arranged in the partition plate, so that one of the chambers functions as a reservoir. A displacement regulating device according to claim 1.