JPS6246796A - Stopper device for engine for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention is a method for holding an engine in a predetermined position by restricting the movement of a vehicle engine such as a motorcycle by being pulled by a transmission chain. related to bar equipment.

(Prior Art) Some vehicles, such as motorcycles, have an engine supported by a vehicle body frame via vibration-proof rubber so that engine vibrations are not transmitted to the vehicle body frame. In this case, engine vibrations are absorbed by the anti-vibration rubber and are prevented from being transmitted to the vehicle body frame.

In the L structure, the motorcycle is chain-driven, and the engine and rear wheel are interlocked and connected by a wrap-around chain, and when the motorcycle suddenly accelerates or decelerates, there is a large amount of damage to this chain. A tensile force will be generated. This tensile force pulls the engine toward the rear wheels, and this deforms the anti-vibration rubber, so when such a tensile force is generated, the engine can move significantly toward the rear wheels. Become. However, this is not desirable in terms of handling stability and ride comfort. Therefore, in order to restrict the movement of the engine due to the tensile force of the chain, some motorcycles have conventionally provided a stopper rod between the engine and the body frame.

(Problem to be Solved by the Invention) By the way, since the above-mentioned engine is supported by the vehicle body frame via elastically deformable vibration-proof rubber, when the engine is removed from the vehicle body frame, the mounting position of the engine with respect to the vehicle body frame cannot be determined. It is easy for errors to occur.

If the above error occurs, the relative positional dimensions of the vehicle body frame and engine and the dimensions between the pivot centers of the two ends of the stopper rod will not match, and therefore the assembly of the stopper rod will be difficult. There is a risk of interference.

(Object of the Invention) This invention was made in view of the above-mentioned circumstances, and provides an object to absorb errors in the engine mounting position caused by deformation of the elastic member and to facilitate assembly of the stopper rod to the vehicle body frame and the engine. The purpose is to make it possible.

(Structure of the Invention) In order to achieve the above object, the present invention is characterized by a pivot shaft for pivoting the end of the striker rod to the vehicle body frame or engine, and a stopper rod for inserting the pivot shaft. The feature is that an eccentric bushing is rotatably provided between the inner circumferential surface of the pivot hole.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

A motorcycle 1 is an example of a vehicle, and its body frame 2 is a cradle-type frame, and has a steering shaft tube 3 at the front thereof. A front fork 4 is supported on the steering shaft tube 3, a front wheel 5 is supported on the lower end of the front fork 4, and a handle 6 is attached to the upper end.

On the other hand, a pair of left and right rear arms 9.9 are pivotally supported at the rear of the vehicle body frame 2 so as to be vertically swingable via a pivot shaft 8 whose axis is oriented laterally. A ring lO is supported. 11 is a buffer.

An engine 13 is provided within the frame of the L vehicle arrangement frame 2. A transmission device linked to this engine 13 is provided,
The output chain wheel 14 of this transmission and the input chain wheel 15 which rotates together with the rear wheel 10 are interlocked and connected by a wrap chain 16.

A carburetor 18 is connected to the intake boat of the engine 13, and a fuel tank I tank 1 supplies fuel to the carburetor 18.
9 is supported by the vehicle body frame 2. Furthermore, an exhaust pipe 20 is connected to the exhaust boat of the engine 13 as described above. 21 is a sheet.

The engine 13 includes a crankcase 23 and a cylinder 24 that projects upward from the crankcase 23.
The front, rear, and bottom portions of the crankcase 23 are supported by the vehicle body frame 2 via vibration isolating rubber 25, which is an elastic member.

That is, brackets 26 are attached to the front, rear, and midway portions of the vehicle body frame 2, and these brackets 26
The crankcase 2 passes through these brackets 26.
A vibration isolating rubber 25 is interposed between a pivot shaft 27 supported at the front, rear, and bottom of 3.

On the other hand, a stopper rod 29 restricts the movement of the engine 13 toward the rear wheel 10 side by being pulled by the chain 16.
is interposed between the vehicle body frame 2 and the engine 13.

Connect the stopper rod 29 to the vehicle body frame 2 and the engine 1.
3 will be explained.

That is, the rear end of the crankcase 23 has the pivot shaft 8.
A pivot port 23a which is a pivot shaft parallel to the axis is screwed, and the stopper rod 29 is attached to this pivot port 23a.
The front end of the stopper rod 29 is pivotally supported, and the rear end of the stopper rod 29 is pivotally supported by the pivot shaft 8.

The L pivot shaft 8 is a pair of cylindrical brackets 30, 30 provided on the vehicle body frame A2, and these cylindrical brackets 30.
, 30, and a spacer 32 that is fitted onto the support port 31 and interposed between the cylindrical brackets 30 and 30. In addition, a pair of cylindrical rear arm shafts 33.33 are provided at the front end of the rear arm 9.9.
are provided, and each rear arm shaft 33 is connected to the spacer 3
2 via a bushing 34, whereby the rear arm 9.9 is pivotally supported on the pivot shaft 8 so as to be vertically swingable.

A flange 33a is formed at the opposing end of each of the rear arm shafts 33, and the rear end of the stopper rod 29 is pivotally supported on the biped pivot shaft 8 by being sandwiched between the flanges 33a. An eccentric bushing 35 is interposed between the pivot shaft 8 and the inner peripheral surface of the pivot hole 29a of the stopper rod 29 through which the pivot shaft 8 is inserted. It is said to be able to rotate freely around the center. Above flange 3
3a is formed with an arc-shaped bolt hole 33b centered on the axis of the pivot shaft 8, and an eccentric bushing 35 is screwed onto the rear arm shaft 33 at an arbitrary rotation position by a fixing port 36 passing through the bolt hole 33b. be stopped.

The center of the outer peripheral surface of the eccentric bushing 35 is offset by an eccentricity dimension δ with respect to the axis of the pivot shaft 8, and the fixing port 36 is screwed into the thick portion of the eccentric bushing 35.

When a tensile force is generated in the chain 16 while the motorcycle 1 is running, this tensile force causes the engine 13 to
Although the engine 13 tries to move to the side, the movement of the engine 13 is restricted by the stopper rod 29. Therefore, it is possible to prevent a decrease in steering stability due to movement of the engine 13, and to ensure good riding comfort.

As shown in FIGS. 3 and 4, the eccentric bushing 35
By rotating the engine 13, errors in mounting the engine 13 to the vehicle body frame 2 can be absorbed. That is, from the state in which the thick part of the eccentric bushing 35 is located in front of the pivot shaft 8 as shown in FIG. When the eccentric bushing 35 is rotated to the
The dimension between C can be expanded/contracted by an amount twice the eccentricity dimension δ. Therefore, the body frame 2 and the engine 1
Even if there is an error in the relative front-rear position dimension of No. 3 that is approximately twice the eccentricity dimension δ, this can be absorbed.

Although at least one of the eccentric bushings 35 is according to the illustrated example, the eccentric bushing 35 may be interposed between the pivot port 23a and the stopper rod 29.

(Effects of the Invention) According to the present invention, there is an eccentricity between the pivot shaft that pivots the end of the stopper rod to the vehicle body frame or the engine, and the inner circumferential surface of the pivot hole of the same stopper rod through which this pivot shaft is inserted. Because the bushings are rotatable, the engine is supported by the body frame via an elastic member, and even if the elastic member is deformed and there is an error in the mounting position of the engine relative to the body frame, the stopper rod can be moved. When assembling, by rotating the eccentric bushing and adjusting the dimension between the pivot centers of both ends of the stopper rod, it is possible to absorb errors in the mounting position of the engine caused by the deformation of the elastic member. Therefore, the stopper rod can be easily assembled to the vehicle body frame and the engine.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, FIG. 1 is an overall side view of a motorcycle partially shown as a tube diagram, and FIG. 2 is an I of FIG. 1.
3 is a sectional view taken along the line I-II, FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2, and FIG. 4 is an explanatory view corresponding to FIG. 3. 2. Vehicle body frame, 8.-J [lb, 10φ 1% wheel,
13.-Engine, 16.. Chain, 23a.. Pivot port (pivot shaft), 25.--Vibration isolating rubber (elastic member), 2
9. Stopper rod, 29a. Pivot hole, 35.φ eccentric bushing. Patent applicant Yamaha Motor Co., Ltd. Figure 3

Claims (1)

[Claims] 1. The engine is supported on the vehicle body frame via an elastic member, and the engine and the wheels supported on the vehicle body frame are interlocked and connected by a wrapping chain, and one end is attached so as to restrict the movement of the engine toward the wheels. In a vehicle equipped with a stopper rod that is pivoted to the engine side via a pivot shaft and whose other end is pivoted to the vehicle body frame side via another pivot shaft, at least one of the pivot shafts and this pivot shaft. A stopper device for a vehicle engine, characterized in that an eccentric bush is rotatably provided between the inner peripheral surface of a pivot hole of a stopper rod through which the stopper rod is inserted.