JPS58221722A - Normal reverse revolution switching type power taking-out apparatus for car - Google Patents

Abstract

PURPOSE:To improve durability by installing, in a bearing hole on a case, a bearing which is longer than a shaft supporting wall using the small diameter part of an idler gear for reverse revolution for as the outside wall side of the case. CONSTITUTION:The power of an engine 3 is transmitted to an input shaft 37 through a clutch 39, and a normal driving gear 49 and a reverse driving gear 51 are revolved. The normal driven gear 53 on an output shaft 38 is geared with the normal driving gear 49, and a reverse driven gear 54 is driven by the reverse driving gear 51 through an idle 59, and the output shaft 38 is connected to these driven gears by operating a shifter 55 right and left. The small-diameter idler 61 on the idle shaft 59 is used as a case side 44, and a needle bearing 47' which is long in the axial direction is installed in a bearing hole 62 on the case, and a ball bearing 47 is installed on the shaft supporting wall 63 on the large-diameter idler 60 side. Thus, uniform support is permitted, and durability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a forward/reverse switching type power take-off device for a vehicle such as a Tobukta, and provides excellent support for the idle shaft at both ends when 92 idlers for deceleration are arranged on the idle shaft. This is designed to prevent unilateral wear and damage.

First, before explaining an example of the power take-off device of the present invention, the first
To roughly explain the front-loading work equipment mounting mechanism shown in FIGS.
4), a transmission case, etc., are constructed as a structural body, and the engine (3) and the like at the front thereof are covered by a bonnet (5). The front wheel bearing stand (2) is located at the front end of the tractor body (1) and is rigidly connected to the crankcase of the engine (3). (6) is the front axle case, which is swingably supported around the front axle bearing stand (2) K center axis.
A front wheel 91 is provided around the kingpin (8) via a steering wheel 71 or the like so as to be capable of steering operation. The main wheel 19) is used as a driving wheel. (101 is a mounting frame arranged on both sides of the front part of the tractor body (1), which has a cross-shaped shape when viewed from the side. is removably attached to the front vehicle bearing stand (2) by a mounting bolt (2), and the rear end is detachably attached to the clutch housing (4) by a mounting bolt (to).

The upper ends of the upright parts αD of each mounting frame surround are integrally connected on the left and right by a cylindrical connecting member α4 at the front position of the bonnet (5), and a top link mounting base (toward) is attached to the center of this connecting member α4. is provided. The top link mounting base (to) is provided with a plurality of mounting holes αG in the vertical direction, and the top link (to) is pivotably attached to the top link by a pivot pin 0 in a detachable manner. The top link (to) can be expanded and contracted using a turnbuckle. (To) is a mounting frame attached via e2n (to the reinforcing plate inside the lower corner of the front end of !α).

The lower link outside and the lift cylinder (Inc.) are removably pivoted by the pivot pin (A) that can be inserted and removed from the mounting base (2) and the mounting frame 11 (1).In other words,
The lower link U and lift cylinder (to) are attached to the mounting frame (10
1, that is, within the width of the front axle bearing pedestal (2), so that the protrusion outward in the lateral direction in the vicinity of the front axle bearing pedestal (2) is minimized.

There is a pair of lower links (c) on the left and right, and the tractor body (1)
It is pivotally supported by a pivot pin so that it can freely move up and down while protruding forward from there. IJ y ) The cylinder (to) is for raising and lowering the lower link (support), and there is a pair of left and right cylinders corresponding to each example of the lower link, and one end of this cylinder is connected via the pivot pin m. The lift arm is naturally connected.

The 1J7 toe arm fin is pivoted so as to be vertically movable around its axis by a connecting member α, and a lift rod connected to each lower link is pivotally attached to the front end of the lift arm fin. The outside of the lower link has ball joints at both ends. ■ is a check chain that regulates the left and right movement of the lower link (c), and is adjustable by the turnbuckle (1), and is attached to the check chain fixture GD attached to the inside of each mounting frame , are removably connected by a mounting pin on the same axis as the pivot pin. (
) is a muzzleloading work machine. (to) is the front power take-off device, which is removably attached to the front of the front vehicle bearing stand (2) between the left and right mounting frames (lα) via spacers (to) with multiple mounting bolts. A part of the rear side of this front power take-off device @ has been inserted under the light grille of the bonnet (5), and also, which side of this front power take-off device (to) is located on the lower side? The link @ and the pivot pin (2) of the lift cylinder are arranged.The front power take-off device (2) is connected to the input shaft ■ and the output shaft (front P'I'O axis) @
The input shaft (b) is removably connected to the crankshaft of the engine (3) via a clutch and a transmission shaft. , - is a pair of left and right mounting frames +10
11'lfl K The front vehicle bearing stand (
2), and the force that acts on the pivot bin via the lift cylinder when the work equipment is raised, and the force that acts on the pivot bin via the lower link (2) when the work equipment is pushed back. This is to transmit the information to the front side (2a) of the front wheel bearing stand (2). In this case, the lift cylinder (to)
and the axis of the lower link example is located at the front part (2) of the front vehicle bearing stand (2).
It is configured to pass within the height range of a). 3 points 1 based on the example of the top link (to) and the pair of left and right lower links
” link mechanism is configured.

In this way, the installation and drive system for front-mounted work equipment is constructed, but depending on the model of work equipment, the conventional power take-off device that only drives forward rotation has a limit of 69. There has been a demand for a device that can do this, and the applicant has created and proposed a specific device.

That is, what is shown in FIGS. 5 to 7 is one embodiment.

To explain its overall appearance, the case is a power take-off case made by joining the rear case ■ and front case ■ with bolts ■..., and the upper and lower parts of the game are respectively The input shaft (9) and the output shaft (to) facing in the front-rear direction are equipped,
These are suspended and rotatably supported by bearing bodies (47). A forward rotation drive gear is fixed to the front end of the input shaft (9) via a collar throat, and a reverse rotation drive gear is fixed to the rear thereof via a distance collar.

Each of these gears i5υ has four oil passages (52+ (521). On the other hand, the lower output shaft (to) is equipped with a forward rotation driven gear link at the front, which is required for the upper forward rotation drive gear ■. In addition to being constantly engaged under the reduction ratio of A lever group is provided, and by responding to the lever group and the shift fork from the outside, the engaging teeth f58 at the end of each driven gear are
11581, and can be freely engaged with the output shaft (to).

In this way, the input system and the output system were configured, but how do the idle shafts (5gI, input side idler, output side idler IIJ, and 7 bearing means, etc.) configured for the reverse transmission system positionally and support strength? The question here is whether it is constituted by such a relationship.

In view of these points, the present invention has given some consideration to the forward/reverse type power take-off device, and therefore, the feature here is that an input for power take-off is provided in the power take-off case provided on the vehicle. A shaft and an output shaft are mounted to make these five axes parallel to each other, and a forward rotation drive gear and a reverse rotation drive gear are provided on the outer periphery of the input shaft so as to be able to freely rotate together with the input shaft,
The outer periphery of the output shaft is provided with a forward rotation driven gear, a reverse rotation driven gear, and a shifter positioned between the two driven gears and selectively engaged with each other. A forward/reverse switching type power take-off device comprising an input side idler and an output side idler, one end of which is supported on the outer wall of the power take-off case, and the other end supported on a shaft support wall protruding into the space inside the case. Of the two eye doors, the large-diameter idler that meshes with the reverse drive gear is on the shaft support wall side, and the other small-diameter idler is on the shaft support hole side formed with a tin film on the outer wall of the power extraction case. The point is that the space between the bearing hole and the idle shaft is rotatably supported by a bearing body having a longer bearing length in the axial direction than the bearing body on the shaft support wall side.

Hereinafter, the main parts will be explained based on the above-mentioned embodiment.

That is, inside the front case (2), as shown in Figure 6, an integral shaft support wall is provided that protrudes into the inner space, and a ball-shaped bearing body (4'h) is fitted in the center of the wall. The front end of the idle shaft (-) is supported on the bearing body 17), while the rear end (17) is fitted with a needle/L in the bearing hole formed in the tin film in the rear case ■.
/Jt type bearing body is supported through the shaft.

A large-diameter input idler 9I that meshes with the reverse drive gear υ is attached to the front part of the idle shaft 15@, and a small-diameter output idler βD is attached to the rear thereof.
Particular consideration was given here to the driven gears f! before and after the output system.
By making good use of the fact that the space between 51M and 51M is inevitably arranged with a necessary front and rear space due to the presence of the four-fathom lid i6 for forward/reverse switching, the shaft support wall (631 and the front input side idler 6I As a result, it is no longer necessary to place the idle system as far above the output system as possible, and the compactness of case @4 has been achieved. First, by making it more compact, it became lighter, cheaper, and more rigid, and since it was located lower than the output system, oil lubrication performance was also improved.

Another feature is that, as mentioned above, since the output idler β0 is on the small diameter side, the input idler @1 on the large diameter side also has a larger transmission torque of −<1. If both sides were supported by a single ball bearing, of course a large load would be applied to the shaft end of the output side idler @υ, which has a small diameter.
Therefore, one more consideration was taken and a needle-type bearing body 1 with a long bearing length was interposed at the rear end of the idler shaft. Of course, in this case, since the actual bearing capacity is the issue, two or more rows of ball bearings may be used instead of needles.

To supplementarily explain the constituent points of the above embodiment, FIG. 6 shows an L-shaped auxiliary pocket protruding and fixed onto the front axle bearing stand (2) or the abutment member (c), through which the Attach and secure the mounting boss ■ on the upper left side of the power take-off case. If this is the case (c) of forward rotation only, as shown in the imaginary line A in Fig. 6, the mounting bolts (to) can be arranged at four points, but as shown in the solid line case in Fig. 6, one shoulder This is based on the fact that if the bolt is bulging in an idle system, it will be difficult or impossible to place the bolt in the correct position because of the positional restrictions with the external neighboring parts. Also, - is the oil supply part protruding from the front of the Goase Co., Ltd.

This invention is as described above, and therefore, of the two idlers arranged on the idler shaft, the shaft end side that supports the smaller diameter idler is supported by a high-capacity bearing body exclusively for needles, and the other end is supported by a normal single ball. Since it is configured as a bearing, the idle shaft can be evenly supported at both ends as described above, and it has become possible to provide sufficient durability even when a force is applied to one side.

It is to be noted that there are plans to implement the present invention in rear power take-off devices and other devices.

[Brief explanation of drawings]

Fig. 1 is a side view of a tractor showing an example of the present invention, Fig. 2 is a front side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a front view thereof, and Fig. 5 is an enlarged cross section of a power take-off device. 6 is a sectional view taken along the line Vl-71 in FIG. 5, and FIG. 7 is a sectional view of other parts. ■...°Front power take-off device, @...Input shaft, (to)...
...Output shaft, ■...Power extraction case, @no...Needle type bearing body.禰...Forward rotation drive gear, φB...Reverse rotation drive gear,
・Forward rotation driven gear, ■・・・Reverse rotation drive gear, G-shaped...
Idle axis, 16I...Input side idler, @υ...
Output side idler, (6 (to)... shaft support wall. Patent applicant Kubota Iron Works Co., Ltd. Figure 7 Figure 3

Claims (1)

[Claims] 1. Install an input shaft and an output shaft for power extraction in a power extraction case provided on the vehicle, and install an idle shaft between the input shaft and the output shaft so that these three axes are parallel to each other. None, and the outer periphery of the input shaft is equipped with a forward rotation drive gear and a reverse rotation drive gear so as to be able to rotate together with the Δ axis, while the outer periphery of the output shaft is equipped with a forward rotation driven gear, a reverse rotation driven gear, and a rotation drive gear between both driven gears. The idle shaft is provided with an input side idler and an output side idler that are individually engaged with the reverse rotation drive gear and the reverse rotation driven gear, respectively, and one end of the idle shaft is connected to the drive gear. A forward/reverse switching type power take-off device having a forward/reverse switching type power take-off device whose other end is supported on the outer wall side of the take-out case and on a shaft support wall protruding into the inner space of the case, the larger-diameter idler being meshed with the reverse drive gear of the two idlers. is on the shaft support wall side, and the other small-diameter side idler is connected to a bearing hole recessed in the outer wall of the power take-off case, and the distance between the bearing hole and the idle shaft is set closer to the shaft than the bearing body on the shaft support wall side. A forward/reverse switching type power take-off device for a vehicle, characterized in that the power take-off device is rotatably supported by a bearing body having a long bearing length in the direction.