JPH01178096A - Step structure for motorcycle associated with pedals - Google Patents

Abstract

PURPOSE:To improve comfortableness by applying an elastic bush onto at least one section of a pedal crank to be secured to a pedal shaft or a rotary shaft, thereby preventing transmission of engine vibration or grounding impact due to puncture of tire. CONSTITUTION:In a motorcycle associated with a stepping structure, an engine 2 is mounted below a pair of main frames 1 arranged to the right and left of the motorcycle, where pedal cranks 10 are secured to the opposite shaft ends of a rotary shaft 9 to be rotated through the engine 2 with a pedal shaft 11 being secured to the other end thereof. When pedals 12 supported rotatably on the pedal shaft 11 is stepped, rear wheels 4 are rotated through a chain 15 and the rear wheels 4 are also driven by the power of the engine 2 through a drive shaft. The pedal shaft 11 is secured through an elastic bush 13 to the pedal crank 10 in order to block transmission of vibration from the pedal crank 10 side to the pedals 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a foot structure for a motorcycle, tricycle, etc. equipped with pedals.

[Prior art]

For motorcycles, tricycles, etc. (hereinafter referred to as motorcycles with pedals, etc.) equipped with relatively small displacement engines,
In addition to driving the wheels with the engine, a rotating shaft extending in the width direction is supported on the engine, and a pedal is attached to the end of this rotating shaft via a pedal crank and a pedal shaft, so that it can also be driven by foot. There is something I did.

However, in such motorcycles with pedals, engine vibrations are transmitted to the feet through the pedals, so there is a problem in that the rider feels more uncomfortable than when riding a bicycle.

Furthermore, since the pedals protrude in the width direction of the vehicle, the driver feels uncomfortable when the pedals contact the road surface during cornering. In order to eliminate such discomfort when banking, it is possible to position the pedals upward, but this puts strain on the riding position, resulting in poor riding comfort.

[Purpose of the invention]

An object of the present invention is to provide a foot structure for a motorcycle with pedals, which prevents engine vibrations and shocks caused by ground contact during banking from being transmitted from the pedals to the driver, and ensures good riding comfort. .

[Structure of the invention]

The present invention achieves the above object by supporting a rotating shaft extending in the width direction on an engine mounted on a frame, fixing a pedal crank to the tip of the rotating shaft, and attaching a pedal to the end via the pedal shaft. The present invention is characterized in that an elastic bushing is interposed in at least one of the fixing portions of the pedal crank to the pedal shaft or the rotating shaft.

Hereinafter, the present invention will be specifically explained with reference to embodiments shown in the drawings.

The figure shows a motorcycle having a foot structure according to an embodiment of the present invention. Reference numeral 1 denotes a pair of left and right main frames, an engine 2 is mounted below the main frames, and a front wheel 3 and a rear wheel 4 are provided at the front and rear.

On the intake side of the engine 2, there is an air purifier 5 and a carburetor 6.
An exhaust system 8 having a main muffler 7a and a sub muffler 7b is connected to the exhaust side. The main muffler 7a is arranged at the rear of the lower part of the engine, and the auxiliary muffler 7b is arranged at the lower part of the engine. Furthermore, a fuel tank 16 and a lubricating oil tank 17 are provided above the engine 2, and a seat 18 is further provided above.

Further, the crankcase of the engine 2 includes a rotating shaft 9.
is supported in the width direction, and both axial ends thereof protrude to both the left and right sides. A pedal crank 10.10 is fixed to each end of the shaft, and an elastic bushing 13.13 made of rubber is connected to the other end of the pedal shaft 11.
11 is fixed, and a pedal 12 is attached to the pedal shaft 11.11.
．． 12 is rotatably attached. therefore,
By depressing the pedal 12, the rear wheels 4 can be driven via the chenno 15. On the other hand, the power of the engine 2 is transmitted to the rear wheels 4 via a drive shaft (not shown) inserted through the rear arm 1a.

The elastic bushing 1 is used to fix the pedal shaft 11 in this way.
3, the vibrations of the engine 2 are not transmitted to the feet via the pedals 12. Furthermore, even if the pedal touches the ground during cornering, the shock received from the road surface can be absorbed, eliminating discomfort for the driver.

In each of the pedal cranks 10.10, the portion fixed to the rotating shaft 9 is a disk-shaped disk portion 10a. A sprocket 14 is fixed on the inside of one of the left and right disc parts 10a and lQa, and the rear wheel 4 is driven through a chino 15 wound around the sprocket 14. Separate left and right side covers 19.19 are attached to both sides of the engine 2. This side cover 19 not only covers the engine body, but also covers the carburetor 6, exhaust device 8, etc. attached to the engine, so as to improve the appearance. In particular, the main silencer 7a and the sub-silencer 7b are heated, but these are not heated by the side cover 1.
By covering the inside of 9, the driver is prevented from being affected by heat.

Further, the side cover 19 has a circular hole 20 that surrounds the outer periphery of the disk portion 10a of the pedal crank 10 with a certain gap left, and a rib 19 is formed along the circular hole 20.
I am trying to form a. By providing such a circular hole 20 in the side cover 19, when the side cover 19 is to be attached or detached for maintenance work, the pedal crank 10 can be easily attached or detached while it is still attached, without having to take the trouble of removing the pedal crank 10. become able to. Further, even if the large circular hole 20 is provided as described above, since the rib 19a is provided, even if it is a thin plate, the rigidity will not be insufficient, and the cover shape can be stabilized.

In the above-described embodiment, the elastic bushing 13 was interposed at the part where the pedal shaft 11 is fixed to the pedal crank 10 to prevent the transmission of engine vibrations and to absorb the shock caused by contact with the ground in the event of a puncture. An elastic bushing may be interposed at the portion where the pedal crank 10 is fixed to the rotating shaft 9. Alternatively, elastic bushings may be interposed in both the fixing portion between the pedal crank and the pedal shaft and the fixing portion between the pedal crank and the rotating shaft.

Further, as the rubber material of the elastic bushing provided in the present invention,
It is preferable to choose one with a high spring constant rather than one with a small spring constant. By using a rubber material with a high spring constant in this way, it is possible to prevent the transmission of shocks caused by engine vibration and ground contact during banking, without impairing the foot pedal function.

〔Effect of the invention〕

As described above, the present invention supports a rotating shaft extending in the width direction on an engine mounted on a frame, a pedal crank is fixed to the tip of this rotating shaft, and a pedal is attached to the end via the pedal shaft. In motorcycles, etc., there are few fixed parts of the pedal crank to the pedal shaft or rotation shaft (an elastic bushing is interposed on one side of the pedal crank, so engine vibrations and shocks caused by grounding during banking are not transmitted to the driver). , it is possible to improve riding comfort.

[Brief explanation of the drawing]

Fig. 1.2 shows a motorcycle having a foot pedal structure according to an embodiment of the present invention, Fig. 1 is a schematic sectional view taken along arrow II in Fig. 2, and Fig. 2 is a side view of the motorcycle. be. DESCRIPTION OF SYMBOLS 1... Main frame, 2... Engine, 6... Carburizer, 8... Exhaust system, 9... Rotating shaft, 10... Pedal crank, 11... Pedal shaft, 13... ...Pedal, 13...Elastic bushing. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] In a motorcycle, etc., in which a rotary shaft extending in the width direction is supported on an engine mounted on a frame, a pedal crank is fixed to the tip of the rotary shaft, and a pedal is attached to the end via a pedal shaft. A foot pedal structure for a motorcycle or the like with a pedal, characterized in that an elastic bush is interposed in at least one of the fixing portion to the pedal shaft or the rotating shaft.