JPS59164452A - Supporting device for idle gear - Google Patents

Abstract

PURPOSE:To make disassembling and assembling for a gear case performable without imposing excessive force on an idle gear, by having the idle gear to be interposed in a gear train between a shaft pivotally supported on a split surface of a gear case and a shaft pivotally supported on a halved part of one side supported by the halved part of the other end. CONSTITUTION:A driving shaft 9 is pivotally supported in between by both halved parts 5a and 5b to be divided at a split surface (a) of a gear case 5. A backward gear train GR is supported by a holder 19 being a separate one from the gear case at a position between a driving gear 16 on the driving shaft 9 and a driven gear 17 on a driven shaft 12 via an idle gear 18. The holder 19 is made up so as to be lockably supported by a locking member 20 provided in an outer surface of the halved part 5b at the left side, and the idle gear 18 is installed in a pair at both sides in direction of a shaft to be supported at its fulcrum shaft 18a. In time of disassembling for the gear case 5, if a nut of the locking member 20 is loosened, each holder 19 comes free of movement in a direction crossed at a right angle with the split surface (a) in relation to the halved part 5b at the left side, which therefore becomes separable to the left.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an idle gear support device mainly applied when a reverse gear train is incorporated into a transmission of a two-wheeled motor vehicle with a sidecar.

Conventional motorcycle transmissions have a transmission gear case that is formed integrally with the engine crankcase, and a shaft that is located between one half and the other half of the core case. A supported drive shaft, a driven shaft supported on the shell side half, and 'f
I: In general, a plurality of forward gear trains are arranged between the two shafts, and when a reverse gear train with all intermediate idle gears is installed between the two shafts, the driven shaft is generally It is conceivable to insert the support shaft of the idle gear into the shaft support walls on both sides in the axial direction of the negative half of the shaft, but in this case, when the driven shaft is removed during maintenance, the entire idle gear is removed. It is necessary to remove it from the negative half along with the support shaft, which causes the inconvenience that the work is troublesome.

In order to solve this problem, the idle gear is supported by the other half, and the idle gear is removed together with the other half by splitting the gear case. In this case, the idle gear is inserted into and removed from the split surface, passing over the drive gear on the drive shaft and into one half.
In order to cross over the drive gear, it is necessary to move it in the radial direction of the drive shaft parallel to the half-full surface of the other side of fC,
The other half cannot move in the radial direction unless the other half is engaged with the drive shaft that is supported on the split surface and is separated to some extent in the direction intersecting the split surface.Therefore, the idle gear cannot move in the radial direction. When dividing the case, it is necessary to support the other half so as to allow movement in a direction perpendicular to the dividing surface of the other half.

An object of the present invention is to solve this problem and provide a supporting device i1 for an idle gear. In a gear case that is housed in a gear case υ that has an intermediate idle gear that connects a shaft that is supported on the split surface of the part and a shaft that is supported on the negative half of the part, Supported by a separate holder, and supported by the other half of the holder so as to be movable in a direction perpendicular to the split surface and fixed by a fixing member provided on the outer surface of the other half. t features.

Next, the present invention will be explained with reference to the illustrated embodiments.

Referring to Fig. 1, (l) shows a two-wheeled motor vehicle with a sidecar (2) attached to the - side, and (3) shows an engine installed therein, with the engine (3) mounted on both sides in the lateral direction. It consists of a horizontally opposed four-cylinder engine, each having a pair of cylinders (4), and a forward four-cylinder engine as shown in FIGS. A speed change gear mechanism 16) with one reverse speed is incorporated.

To explain this in more detail, the gear case (5) is composed of two halves (5al (5b)) on both sides divided by a substantially vertical splitting plane a at the center in the lateral direction, as shown in FIG. , the drive shaft (9), which is held between the beef parts (5a) and (5b) by the split surface a and connected to the crankshaft (7) via the clutch (8)k, as shown in FIG. In addition to being longitudinally supported, the rear wheel (l) of the motorcycle (1) is mounted on the right half (5a).
a) Propeller shaft αQ connected to 7 inal shafts all't-
A driven shaft α21 connected through the shaft is supported parallel to the drive shaft (9), and the drive shaft (9) and the slave #MJIII14]
As shown in Fig. 4, a forward gear train (Gl) (G2) (G3), (G4) and a reverse gear train (GR) are installed between The right half (
5a), each shift gear (151
It was made to be established selectively by sliding.

Here, the reverse gear train (GR) has an eyeton gear aFj interposed between the drive gear u61 on the drive shaft (9) and the driven gear 07 on the driven shaft f121, and this idle gear 0 The present invention may be applied as a support device for a mark. That is, the idle gear (181) is supported by a holder (IIK) separate from the gear case (5), and the holder (
19. On the left half (5b) on the opposite side to the right half (5a) that pivotally supports the driven shaft aa, the left half (5b) is movable in a direction perpendicular to the split plane a. A fixing member of 11 N (2υ) is fixedly supported on the outer surface of the holder.
The idle gear (1&) is provided in a pair on both sides in the axial direction to support it on its support shaft (18a), and a mounting base t29 with a length reaching the split surface a is provided on the inner surface of the left half (5b). A pair of through holes C are formed in the mounting base 1211 in a direction perpendicular to the split surface a as shown in FIG. Each award passage hole (2) is slidably inserted and supported, and each holder (11) is inserted into the left half ( 5b).

In addition, one rc of both the holders (1!#(19) is connected to the support shaft (
An oil hole (24) is formed for supplying lubricating oil to the shaft support (18c) of the idle gear 081 on the outer periphery of the idle gear 081 through the shaft hole (18b) of the idle gear 18a).
A bottle (2) was press-fitted to prevent the 18al bottle from coming out.

Figure 6 shows a VC system that allows the change operation to the reverse side to be performed only when the engine throttle is once below the desired value.
Showing the 1!4 operation prevention mechanism, the shift drum (13)
A stopper (
251, the 77 tod drum (131) is detached by operating an operating member consisting of an operator (27) on a switch unit aQ provided on the handle of a two-wheeled motor vehicle (IT) and an operating wire C barrel linked thereto. In addition, it is recommended to install locking devices jIt and c2I that operate when the throttle opening K is equal to or greater than a predetermined value to lock the operation member inoperable.

To explain the kneading process in more detail, the locking device (21 is equipped with a locking piece 0υ that is movable between a locking position where it locks with a protrusion on the operating wire (to) and a release position on its side). A cam (b) with a slotted wire link which is interlocked with the accelerator grip of the lock piece Ul)k is used to switch between the lock position when the throttle opening is above a predetermined value and the release position when it is less than that. Thus, only when the lock piece (3υ) is less than a predetermined value of the throttle opening in the release position, a disengaging operation of the stopper ξ group is applied via the operation wire (c). , the rotation of the reverse position/\ of the shift drum αJ, that is, the change operation to the reverse side is made possible.

In the drawing, (c) shows the opening of the erroneous operation prevention mechanism disposed in the switch unit (261).

Next, as described above, the present invention will be explained in detail. When disassembling the gear case (5), first the fixing member (
(To) This is to loosen the nand, and when doing so, each holder a9 can move freely in the direction perpendicular to the split surface a with respect to the left half (5b), that is, in the left and right direction in Fig. 2, and the idle gear UO drive gear Even if each holder α9 is held in the illustrated assembly position by engagement with α0, the left half portion (5b) can be separated from the left side.

Then, after moving the left half (5b) to the left to a predetermined separation position where there is play in the vertical direction with respect to the drive shaft According to this, the idle gear U& passes over the drive gear u61' and the left half V
It is removed from the right half (5a) together with A (5b), and is then maintained for maintenance in the same manner as a normal motorcycle transmission that does not have a reverse gear train (GR). You can get it by doing this.

The gear case (5) can be assembled by following the above procedure in almost the reverse order.

The present invention can also be applied to cases in which the gear case is composed of a dual-type crankcase that is divided vertically, and idle gears other than the reverse idle gear can be supported in a gear case separate from the crankcase. It is also applicable when

In this way, according to the VC of the present invention, the idle gear interposed in the gear train between the shaft supported on the split surface of the gear case and the shaft supported on one half of the gear case is inserted through the holder. The holder is supported by the other half, and the idle gear and the other half can be removed from the negative half, facilitating maintenance. It is fixed to the other half by a fixing member on its outer surface, and by releasing the fixation, it can move freely in the direction perpendicular to the split surface, even if the cedar idle gear is restrained at a predetermined assembly position. This has the effect that the gear case can be disassembled or assembled without applying excessive force to the idle gear by moving the other half in a direction perpendicular to the split surface.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a motorcycle with a sidecar equipped with a transmission incorporating the inventive tube, Fig. 2 is a cross-sectional rear view of the transmission, and Figs. 1ll-III
FIG. 6 is a sectional view showing a mechanism for preventing an erroneous operation of the reverse change operation of the transmission. (5)...Gear case (5a)...Right side (-4) half (5b)...Left (other side) half a...Cross surface (9)...Drive shaft (Axle supported on the split surface)], (axis) (12
+... Driven shaft (shaft supported by the - side half V shaft) (GR
)... Reverse gear train (181... Idle gear (
II...Holder (2[11...Fixing member special liver applicant 2 people other than Honda Motor Co., Ltd.

Claims (1)

[Claims] In the gear case, there is an intermediate member that connects a shaft that is supported on a split surface between one half and the other half of the gear case, and a shaft that is supported on the negative half of the gear case. In a device that houses the entire gear train having an idle gear, the idle gear is supported by a holder separate from the gear case, and the holder is moved to the other half in a direction perpendicular to the split surface. A support device for an idle gear, characterized in that it is supported in a freely fixed manner by a fixing member provided on the outer surface of the other half.