JPS6321783Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a waterproof bearing in which a sealing member is interposed in the gap between the kick arm and the engine case to which it is attached, in a small vehicle equipped with a kick-type starting device close to the wheel. Regarding equipment.

Conventionally, vehicles such as motorcycles equipped with a kick-type starting device have a structure in which a kick arm having a kick pedal is connected to a kick spindle provided in the engine case. In order to prevent water, etc. from entering the engine case through the bearing part of the engine case, for example, some vehicles were equipped with a built-in sealing member near the bearing that supports the kick spindle. Due to the structure, most of them do not require such a sealing member for waterproofing. However, in vehicles such as tricycles that have one front wheel and two rear wheels, the engine and drive wheels are integrally installed in the rear body, so if the engine is equipped with a kick-type starting device, the engine and drive wheels may be placed close together. Due to the driving rear wheels, muddy water or the like can splash onto the kick-type starting device during rainy weather, causing inconvenience.

The present inventor has devised the present invention in view of the above-mentioned problem and to effectively solve the problem.

The purpose of the present invention is to provide a seal member in the gap between the base end of the kick arm of the engine's kick-type starting device and the engine case in a small vehicle where the wheels are placed relatively close to the engine's kick-type starting device. An object of the present invention is to provide a bearing waterproofing device comprising:

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an example of a vehicle to which the present invention is applied, and this vehicle is a tricycle. The present invention can also be applied to small vehicles such as motorized four-wheeled vehicles. The tricycle 1 consists of a front body 2 and a rear body 3. A front wheel 4 serving as a single steering wheel is provided at the very front of the front vehicle body 2, a handle 5 is provided at the top, and a low flat floor 6 is provided at the middle of the handle 5 at the rear. A seat post 8 having a seat 7 on the top thereof is erected. The rear vehicle body 3 is provided with two rear wheels 9 that serve as driving wheels, and a power unit is installed inside the rear wheels 9. The front body 2 and the rear body 3 are connected by a joint 10, and the function of this joint 10 allows the front body 2 to
and the rear vehicle body 3 are connected to be able to swing vertically and horizontally.

Next, the power unit 11 installed in the rear vehicle body 3
Explain the structure of As shown in FIG. 2, the power unit 11 consists of an engine 12 and a transmission case 13. The central member 14 of the transmission case 13 is formed long rearward and forms the left side of the crankcase, the left side of the central member 14 is covered with a cover 15, and the rear part of the central member 14 has a bearing portion 14 that bulges outward in the width direction.
A is provided, and the outside (right side) of this is covered with a small cover 16. Therefore, the transmission case 13 consists of a central member 14 of which the crankcase is a part, and covers 15 and 16 on the left and right sides of the central member 14, which are joined together with bolts or the like, and a gasket or the like is interposed on the joining surfaces. .

At the front inside the transmission case 13 is a variable drive pulley 17 connected to the crankshaft 12a.
However, driven variable pulleys 18 are arranged at the rear, and these pulleys 17 and 18 are connected by a V-belt 19. A centrifugal clutch 20 is arranged on the driven pulley 18, and its output shaft 20a is connected to a drive shaft 22 via a gear transmission mechanism 21,
The drive shaft 22 consists of concentric left and right shafts 22a and 22b divided in the axial direction, both shafts are connected by a friction clutch 23, one shaft is connected to the gear transmission mechanism 21, and the outer ends of each shaft are connected to the left and right shafts. protrudes from the covers 15, 16, and the left and right rear wheels 9, 9 are connected to the shaft ends,
Forms the driving wheel.

Next, the power unit starting mechanism will be explained. This consists of, for example, a kick-type starting device, 24 is a kick arm, a well-known kick pedal (not shown) is attached to the tip of the kick arm 24, and a base end 24a of the kick arm 24 is attached. is transmission case 13
It is fixed to a portion 25a of a kick spindle 25, which is horizontally suspended in the transmission case, and which extends outside the transmission case.
The hard spindle 25 has a hard sector gear 26,
A hard idle shaft 28 is also horizontally mounted on the transmission case 13 via a hard idle gear 27.
Further, this hard idle shaft 28 is connected to a hard driven gear 30 via another idle gear 29 so as to be interlockable. When the kicking power is transmitted based on the above configuration due to the kicking action in the kicking arm 24, the kick driven gear 30 moves inward toward the crankshaft 12a as shown in FIG. The formed gear teeth 30a mesh with gear teeth 12b formed at the end of the crankshaft 12a, thereby transmitting the kick power to the crankshaft 12a and acting to start the engine of the power unit. In FIG. 2, reference numeral 31 is a return spring, and after the return spring 31 is turned off, the kick arm 24, the kick spindle 25, etc. are returned to the state before being turned off.

Next, only the portion of the power unit starting mechanism described above is shown enlarged in FIG. Identical elements in FIG. 2 are given the same reference numerals. Referring to FIG. 3, the features of the present invention will be explained in detail. Central member 14 of transmission case 13
The kick spindle 25, which is suspended horizontally in
It is pivotally supported at 5a and extends further outward from the bearing 15a. Spindle bushes 32 and 33 are interposed in each bearing 14a and 15a, respectively. A groove is formed in the axial direction on the outer periphery of the extending portion 25a of the kick spindle 25, and a groove is formed in the axial direction.
A similar groove is formed in the hole 24b of the base end portion 24a of No. 4, and the extending portion 25a and the hole 24b are spline-fitted, and the joint portion is fixed with a key 34, a bolt, or the like.

At the joint portion between the base end 24a of the above-described kick arm 24 and the outwardly extending portion 25a of the kick spindle 25, a recess 35 is formed around the hole 24b on the end surface of the base end 24a facing the left cover 15. is formed, and is housed in this recess 35 to connect the case side of the base end 24a of the kick arm and the case 1.
5 and sandwich the sealing member 36 over the entire circumference of the fitting portion of the kick spindle 25. Further, the sealing member 36 is brought into contact with the case 15 over the entire circumference of the screw spindle fitting portion. Seal member 36
is in the shape of, for example, an O-ring, and is made of rubber. The purpose of interposing this seal member 36 is to prevent muddy water etc. from entering the inside of the transmission case 13 through the left bearing 15a of the kick spindle 25.
so that the part is completely sealed from the outside,
It is provided with a wall thickness slightly larger than the depth of the recess 35 to the extent that it comes into contact with the outer surface of the case 15.
Moreover, the kick spindle extension part 2 of this case 15
A recess 37 is provided around 5a, and the kick arm base end 24a and the kick spindle 2 are connected in this recess 37.
Combine 5.

In the above, rubber was used as an example of the seal member 36, but the seal member 36 is not limited to this, and it goes without saying that any material can be used as long as it can achieve the purpose of the present invention. Further, in the above embodiment, a recess 35 is formed in the end face of the kick arm base end 24a, but this recess 35 is not necessarily necessary, and a sealing member 36 is simply interposed in the gap between the base end 24a and the cover 15. Of course, the purpose of the present invention can be fully achieved even if it is only that.

As is clear from the above explanation, according to the present invention,
It completely prevents water, mud, etc. from entering the bearing part of the kick spindle of the kick type starter, eliminating wear on the bearing, and further improving its durability by preventing rattling of the kick arm. Furthermore, the operability of an engine equipped with such a kick-type starting device can be improved, and there are advantages such as easy maintenance of the oil seal. In addition, since the present invention seals between the outer surface and the opposing surface that contact the sealing member, the sealing member can be easily pressed depending on the mounting position (position of the key) on the spindle of the lock arm that is finally assembled. Sealing properties can also be obtained extremely easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a diagram showing an example of a vehicle to which the present invention is applied, FIG. 2 is a sectional view of a power unit, and FIG. 3 is for explaining a kick-type starting device. FIG. In the drawing, 1 is a tricycle, 9 is a rear wheel, 11 is a power unit, 24 is a kick arm, and 25 is a kick spindle.

Claims (1)

[Scope of utility model registration request] In a small vehicle in which a kick-type starting device for the engine is installed in a position close to the wheel, a recess is provided around the extension of the kick spindle in the case of the kick-type starting device, and the recess is used to connect the base end of the kick arm with the kick. The spindle is connected, and the base end of the kick arm is fitted onto the kick spindle and fixed with a key or bolt, etc., and the seal member is held between the case side of the base end of the kick arm and the case over the entire circumference of the screw spindle fitting part. A bearing waterproofing device characterized in that the shaft spindle fitting part is brought into contact with the case by a sealing member over the entire circumference.