JPH01156118A - Suspension device - Google Patents

Abstract

PURPOSE:To facilitate installation of a suspension device on a car body by supporting a swing arm in such a manner as to freely rock on a bracket detachably fixed to the motorcycle body and forming a suspension mechanism between the swing arm and the bracket. CONSTITUTION:A plurality of tongue pieces 3a, 3b are formed on the real surface of a crank case 3 in an engine 1, and a bracket 14 is detachably fixed to the tongue pieces 3a, 3b by bolts 12, 13. One end portion of a swing arm 16 j s supported in such a manner as to freely rock at the central portion of the bracket 14 by a bolt 15. One end portion of a bell crank 19 is supported in such a manner as to freely rock between a pair of tongue piece portions 14c, at the lower portion of the bracket 14. One end portion of a suspension unit 21 is pivoted on the other end portion of the bell crank 19, end the other end portion of the suspension unit 21 is pivoted between a pair of fitting portions 14d at the upper and end portions of the bracket 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wheel suspension system that employs a swing arm.

(Prior art) Generally, in this type of suspension system, one end of the swing arm is swingably supported on the vehicle body, and the other end of the swing arm is pivotably attached to the other end of the swing arm. It is arranged so that it can move up and down.

In addition, a suspension mechanism consisting of springs, dampers, etc. is constructed between this swing arm and the vehicle body, and is designed to prevent unevenness of the road surface from being transmitted to the vehicle body or the operator, or to transfer the generated output to the wheels. This is done so that it can be sufficiently transmitted to the road surface.

By the way, in the above-mentioned suspension system, one end of the suspension system is attached to the vehicle body, so if the suspension system is removed from the vehicle body during maintenance and inspection work, the suspension system will also be damaged. Once disassembled, the process of reattaching it to the car body was complicated.

(Object of the Invention) In consideration of the above-mentioned circumstances, an object of the present invention is to provide a suspension device that can be easily assembled to a vehicle body.

[Structure of the Invention] Therefore, in the present invention, a bracket is detachably attached to the vehicle body, a swing arm is swingably supported on the bracket, and a suspension mechanism is provided between the swing arm and the bracket 1. It consists of

〔Example〕

Hereinafter, the specific structure of this defense will be explained in detail based on drawings showing examples.

FIG. 2 conceptually shows a motorcycle to which the suspension system according to the present invention is applied, and illustrates a motorcycle in which the engine 1 is the main body of the vehicle.

This engine 1 includes a cylinder head 2 and a crankcase 3. A head pipe subframe 4 is disposed on the cylinder head 2, and a seat rail 5 is disposed across the cylinder head 2 and the crankcase 3. There is. The head pipe subframe 4 extends forward from the cylinder head 2, and has a telescopic front fork 6 disposed at its tip and a fuel tank 8 disposed above. The telescopic front fork 6 has a handle 9 attached to its upper end and a front wheel 1 attached to its lower end.
This front wheel 10 is steered in the left-right direction of the vehicle body by operating the handle 9. On the other hand, the seat rail 5 extends toward the rear of the vehicle body, and a seat 11 is attached above it.

Further, the engine 1 has two pairs of tongue pieces 3a on the surface of the crankcase 3 located at the rear of the vehicle body.

It has 3a, 3b, and 3b. Tongue pieces 3a, 3a.

3b and 3b each extend toward the rear of the vehicle body, and the bracket 1 is attached thereto by bolts 12 and 13.
4 is installed. As shown in FIG. 1, the bracket 14 includes a substantially doglegged base 14a, and a
A support portion 14b protrudes outward from both ends of the central portion of the support portion 14b.

14b, a pair of tongue pieces '14c, 14c protruding downward from the lower end of the base 14a, and a pair of attachment parts 14d protruding rearward from the upper back side of the base 14a.
, i4d, and the crankcase 3 includes:
Bolt insertion holes 14e are formed in the upper and lower parts of the base 14a, respectively.

14f. Support part 14b.

14b is each formed into a cylindrical shape, and one end of the swing arm 16 is swingably supported thereon via a bolt 15. The swing arm 16 includes two arms 16a, 16a, and a rib 16 connecting these arms.
Furthermore, the rib 16b is provided with a pivot portion 16c, and the rear width 17 is pivotally attached to the other end, as shown in FIG. On the other hand, as shown in Figure 1,
A base portion 19a of a bell crank 19 is swingably supported between the tongue portions 14c, 14c of the bracket 14 via a bolt 18. The bell crank 19 is attached to the base 19.
a, a pivot portion 19b formed in a cylindrical shape at the tip of the base portion 19a, and a pivot portion 19b from the center portion of the pivot portion 19b.
The mounting portion 19c extends in the opposite direction to the mounting portion 19c and has a distal end bent upward. The mounting portion 19G has a bolt insertion hole 19d formed in the left-right direction at the tip.
As shown in FIG. 2, one end of the suspension units 1 to 21 is pivotally attached thereto by inserting and fastening a bolt 20 therethrough. The suspension unit 21 is composed of a spring ring and a damper, and the other end is connected to one of the brackets 14.
It is pivotally mounted between the pair of mounting parts 146,146. Also,
As shown in FIG. 1, the pivot portion 1 of the bell crank 19
A bolt 22 is inserted through and fastened to the bolt 9b, and one end of a rod 23, 23 is swingably supported at both ends of the bolt 22, respectively. The other end of the rond 23.23 is pivotally connected to the pivot joint 16c of the swing arm 16 via a bolt 24, and the swing arm 16 and the bell crank 1
9 are connected.

In the motorcycle configured as described above, when the swing arm 16 swings vertically due to unevenness of the road surface, etc.
As shown in FIG. 3, the movement is transmitted to the bell crank 19 via the rod 23.
is moved in the vertical direction around the bolt 18. When the bell crank 19 is swung, the movement is transmitted to the suspension unit 21 via the attachment portion 19c, and eventually the oscillations of the bell crank 19 and the swing arm 16 are stopped.

On the other hand, during maintenance and inspection work, this suspension system is
When removing the bracket 14 from the crankcase 3, it can be easily removed by removing the bolts 12 and 13 that attach the bracket 14 to the crankcase 3. At that time, in this suspension system, since the suspension gate structure such as the suspension unit 21, bell crank 191113, and rods 23, 23 is configured between the brackets 1 to 14 and the swing arm 16, it is necessary to remove the suspension unit 21 from the engine 1. Even in this state, the suspension mechanism is still maintained.

In addition, although the said Example demonstrated the rear wheel 17 of the motorcycle which has the engine 1 as a main body, the suspension system based on this invention is not limited to these. For example, in the case of a motorcycle having a normal frame, the present invention can be applied to the frame as the main body of the vehicle, and of course can also be applied to the front wheel 10. moreover,
It does not matter if it is a vehicle other than a motorcycle.

Further, in the above embodiment, the bell crank 19, the rod 23
, 23 and the suspension units 1 to 21 constitute the suspension gate structure, but the present invention is not limited to these components.

Furthermore, in the above embodiment, since the bracket 14 is integrally molded, its strength can be improved;
The suspension system according to the present invention is not limited to this.

[Effects of the Invention] As described above, according to the suspension system of the present invention, since the suspension constitutes a structure between the bracket and the swing arm, these can be handled as one unit, and therefore , it becomes easy to attach and detach from the vehicle body.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part conceptually showing a suspension system according to the present invention, FIG. 2 is a side view conceptually showing a motorcycle employing a suspension system according to the present invention, and FIG. FIG. 2 is a side view of a main part conceptually showing the operation of the suspension device according to the present invention. 1... Vehicle body, 14... Bracket, 16...
Swing arm, 19.21.23...The suspension excavation structure.

Claims (1)

[Claims] A suspension system comprising: a bracket removably attached to a vehicle body; a swing arm swingably supported by the bracket; and a suspension mechanism configured between the swing arm and the bracket.