JPS5929835A - Displacement control device of power unit - Google Patents

Abstract

PURPOSE:To reduce vibration transmitted to a car body at the time of minute load such as at the time of idling an engine by decreasing frictional resistance of a sliding contact portion between a buffer rod or the like which is fixed to either a power unit or a car body and a member secured to the other. CONSTITUTION:Between a rubber member 11 fitted in an outer cylinder portion 9 forming a buffer rod 4 and the outer cylinder portion 9, at a portion surrounded by a dotted line E', disposed is a pad member 12 having the coefficient of friction smaller than that of the rubber member 11, and an inner cylinder 7 is inserted in the substantially center of the rubber member 11. At the time of idling an engine, where minute load P works between the inner cylinder 7 and the outer cylinder portion 9 during running, the rubber member 11 is one-sided to the load P direction and deformed. At that time, sliding resistance between the outer cylinder portion 9 and the rubber member 11 is lessened by the pad 12, so that vibration transmission between a power unit 1 and a car body is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device disposed between a power unit and a vehicle body to regulate displacement of the power unit.

Generally, in a vehicle equipped with an internal combustion engine, an engine body 1ai is included as shown in FIG. The displacement mft1ll device 6, such as the crawler arrow 4 and the roll stop horn ζ (provided), is designed to regulate the displacement Z that occurs when the power unit 1 is operated. Such a displacement control device 6 tends to be used more often in the horizontal type power unit 1 because the roll displacement force appears large and becomes a problem.

As an example of the above-mentioned conventional position regulating device 6, as shown in Figs. Rubber members 8 and 8af are arranged as elastic bands on the outer periphery of the rubber members 8 and 8af, and the rubber members 8 and 8a are integrated with each other by vulcanization bonding or the like, and the outside of the rubber members 8 and 8a is Take the brackets LO that make up the external bond parts 9 and 9ai (
= J and fix the rubber members 8 and 3 af.

The rubber member 8 is provided with a pair of constant clearances 8c, so that the spring constant during deformation changes. That is, when the above-mentioned buffer rod 4 has the characteristics shown by the solid line A in Fig. 7, that is, when the force P is small and the displacement δ is small, the spring constant should be small so as not to transmit engine vibration and J'zb Nk to the vehicle body. In the bold line part A'), the main objective is to obtain a characteristic that causes a non-linear increase in the spring load so as to prevent the engine from moving when the force P becomes large. The former state, that is, the state corresponding to thick line A, is when the engine is running at idle and then stopped, or when the vehicle is running at a constant speed.
The latter state, that is, a state other than the thick line A, refers to a case where the engine is rolling due to the torque being applied to the engine during acceleration or deceleration of the vehicle, or a case where the engine is rocking while driving on a rough road.

In any of the above states, the buffer rod 4 has the effect of restricting the movement of the power unit 1 and has the function of increasing running stability and noise. The sixth illustration shows an exploded perspective view of the upper # component.

However, in such a conventional displacement regulating device for a power unit, the rubber member or the like as an elastic member moves once it comes into contact with the holding member that is in contact with the rubber member. Due to the friction coefficient of the rubber member itself, engine vibrations are transmitted to the vehicle body, and the steering wheel or floor may vibrate, which may have an adverse effect on the driver or fellow passengers. That is, dotted line E in FIG.

In the area surrounded by E, the rubber member 8 and the outer cylinder part 9 of the bracket 10 contact each other, and when the rubber member 8 absorbs the rocking or vibration generated in the outer cylinder part 9 and the inner cylinder 7. , since there is frictional resistance between the rubber member 8 and the outer cylinder part 9 at the contact part,
As a result, the spring constant of the rubber member 8 is increased,
The drawback is that the engine vibrations during idling are more likely to be transmitted to the vehicle body.

The purpose of the present invention is to provide a structure that completely eliminates the drawbacks of the conventional displacement regulating device for a power unit as described above. Part 1: Feathers and
a second member that fits into the first member and is fixed to the other; a rubber member fixed to the first member or the second member; a rubber member that is fixed to the first member or the second member; A displacement regulating device for a power unit, characterized by comprising a pad member which is disposed so as to be interposed in a sliding contact portion with a member and is formed of a smeared material having a coefficient of friction smaller than that of the rubber member. This is what I got.

The present invention has the above-mentioned +19 configuration, thereby completely reducing the frictional resistance at the sliding contact portion between the rubber member and the first member or the second part, and as a result, the spring constant of the rubber member is completely reduced compared to the conventional one. Since it can be made extremely small compared to a constant, it has the effect of making it difficult for vibrations and noise to be transmitted to the vehicle body, especially when the force P is small and the displacement δ is small, such as when the engine is idling. It is.

Hereinafter, the embodiments of the present invention will be explained based on the drawings.
When obtaining a mounting structure for a buffer rod 4, roll stopper 5, etc. disposed between a power unit 1 and a vehicle body 3 similar to the conventional one shown in FIG. Constituent outer cylinder parts 9 and 9a
(bracket with i7)・10 is the same as before, but
A rubber member 11 shown in FIG. 8 is used as a cushioning material to be fitted into the outer cylindrical portion 9. The inner cylinder 7 is fitted into the rubber member 11 and fixed to the power unit side (or the vehicle body side), and a pad member 12 is attached to the upper or lower surface of the rubber member 11 at a portion that slides into contact with the outer cylinder part 9. ] l - to stick. The pad 12 is made of a material having a friction coefficient smaller than that of the rubber member 11, and is integrally vulcanized and bonded with the rubber member 11 to form a 1'i'7 structure. pad thin profit 1
2, a patterned material with good sliding properties selected from synthetic resins is used by dividing it into appropriately thick awns, or a means of coating the surface of the rubber member 11 made of nylon or Teflon q- is used. It's okay.

FIG. 9 fAl p (n+t) shows another embodiment of the present invention, and is an example of application of the portion corresponding to the roll stop horn 5 in FIG. A rubber member 14 is attached to the tip, and a comb member 4 is inserted into the corner fij') 15 to restrict the displacement of the power unit 1. 14 has a structure in which the /(dd sound μ month 16 is vulcanized and adhered to the entire surface portion of the 16).

Therefore, even if there is vibration or movement shown by arrow B between the power unit 1 and the vehicle body 3, the rubber member 14 and the pad member 16 formed integrally with the surface thereof and made of barbed materials with a small coefficient of friction. Vibration can be effectively absorbed by this action.

The effect when the present invention is applied to the buffer rod 4 of the above embodiment will be described below. That is, Fig. 10 (A
As shown in l t (B), dotted lines gZ, I! ! Rubber member 1 in the area surrounded by l
The inner cylinder 7 is inserted approximately at the center of the rubber member 11 with a pad member 12° 12 having a smaller coefficient of friction than that of the rubber member 11 interposed therebetween. If we consider the case where a weak load ip is relatively applied between the inner cylinder 7 and the outer cylinder part 9 when the engine is running at idle speed or when driving at a constant speed, it is shown in Fig. 11 (Al j As shown in (B), the load P causes the rubber member 11 to move in the load P direction (
The clearance 110 deforms asymmetrically as the raft moves in the right direction (as shown in the figure). At that time, the pad members 12, 12 are interposed between the outer cylinder part 9 and the rubber member 11, and the pad members 12
, 12, that is, the effect of a small coefficient of friction, makes the sliding characteristics of both extremely good.As a result, the same effect as keeping the spring constant of the comb member 11 small can be brought about. .

The broken line C in Fig. 7 shows the relationship between the load P and the displacement δ of the sofa rod manufactured by applying the present invention. It is smaller compared to the structure, and on the contrary, the engine speed is low, mainly when idling.) (By minimizing the spring constant when the tube receives a small load, it is difficult to transmit vibrations to the car body.) It is surprising that the above effect is exactly the same even with the roll stopper configuration shown in Fig. 9.Furthermore, when the vehicle accelerates, the buffer rod Needless to say, it has a large spring constant commensurate with the load P (as P increases, the displacement based on the clearance of the rubber member reaches its limit).

The power unit displacement regulating device of the present invention can be applied to both the buffer rod and the roll stopper as described above, and the abrasive material, which has a smaller coefficient of friction than the rubber member, can be attached not only to the outer cylinder side as shown in the figure, but also to the outer cylinder side as shown in the figure. It may be on the inner cylinder side. In short, a first member or a second member consisting of an inner cylinder or an outer cylinder which are respectively attached to either the power unit 1 or the vehicle body 3, a rubber member fixedly formed on the fitting portion of the two, and the first part The main feature is that a pad member made of feed having a smaller coefficient of friction than the rubber member is interposed at the sliding contact portion between the wing or the second part thread and the rubber member. As is clear from the above description, the present invention is effective when applied to a displacement regulating device that connects a power unit and a vehicle body through all rubber members. l [-jlfl, completely prevents wear of the rubber member due to friction even after long-term use, and prevents adhesion and aging of the rubber member due to frictional heat,
Since it can also bring about the advantage of improving durability performance, it is extremely effective when applied to displacement regulating devices for power units in various automobiles.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the installed state of the power unit and single unit, and Figure 2 is the structure of a normal buffer rod.
3 is a side view of the same part, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along line v-v in FIG. 2, FIG. 6 is an exploded perspective view of the above-mentioned components, FIG. 7 is a graph for comparing displacement δ with respect to force P of a conventional buffer rod and a buffer rod to which the present invention is applied, and FIG. 741 is a perspective view showing an embodiment; FIG. 9 is a partial side view (No) and a partial perspective view (B) showing an embodiment in which the present invention is applied to a full roll stopper; FIG.
', Figure 1.0 shows the state of the buffer rod before deformation in the present invention.
1A is a side sectional view (B). DESCRIPTION OF SYMBOLS 1... Power unit, 3... Vehicle body, 4... Nokura Arorado, 5... Roll stopper, 6... Displacement m full installation Yt, 7.7a... Inner cylinder, 8, 8
a, 11, 14... comb member, 9.9a.
...Outer cylinder part, 12, 16... NORAD member. Figure 2 Figure 3

Claims (1)

[Claims] (1) In a device that is connected to a power unit through a vehicle body sound-opening rubber member to fully regulate the displacement of the power unit, a first member fixed to either the power unit or the vehicle body; a second member that fits into one member and is fixed to the other; a rubber member fixedly formed on either the first member or the second member;
-1 A pad member formed of a material that is provided so as to be interposed in the sliding contact portion between the two members and the rubber member and has a coefficient of friction smaller than that of the rubber member. Displacement regulating device for the power unit.