JPS58221723A - Normal reverse revolution switching type power taking-out apparatus for car - Google Patents

Abstract

PURPOSE:To reduce the dimension of the whole apparatus through utilization of the space between gears by allowing a large-diameter idler and a shaft supporting wall which are set as inside to be corresponded with a shifter between driven gears. CONSTITUTION:The motive power from 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. A normal driven gear 53 and a reverse driven gear 54 are installed onto an output shaft 38, and selectively connected by a shifter 55. An idle shaft 59 is installed between the reverse driving gear 51 and the driven gear 54, and one edge of the idle shaft 59 is supported in a supporting hole 62 on a case, and the other edge is supported onto a shaft supporting wall 63. A large- diameter idler 60 on the idle shaft 59 is set inside, and arranged, with the shaft supporting wall 63, between driven gears 53 and 54, where the shifter 55 is arranged. Therefore, the sapce between the driven gears which is widened by installing the shifter 55 can be utilized effectively and the dimension of the whole apparatus can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a forward/reverse switching type power take-off device for a vehicle such as a tractor, and particularly to a forward-rotation driven gear and a reverse-rotation driven gear disposed in a power take-off cane for forward/reverse switching. By making good use of the inter-gear space that is inevitably formed between the gears due to the presence of the shifter, etc., the idler and the shaft support wall that protrudes from the inner space to support the idle shaft are arranged in a large assembly. It is an object of the present invention to provide an inexpensive forward/reverse switching type power take-off device that is lightweight, compact, and has sufficient strength. □ First, before explaining an example of the power take-off device of this invention, the first
To roughly explain the front-mounted work equipment mounting mechanism shown in FIGS.
4), a transmission case, etc. as a structure, and the front engine (3) etc. 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 engine case. (6) is a front axle case, which is swingably supported on the front axle holder (2) around the center shaft mb, and terminal reduction gears (7)'I
A front wheel (9) is provided around the king pin (8) via II so as to be capable of steering operation. Note that the main wheel (9) is a driving wheel. α1 is a mounting frame located on both sides of the front of the tractor body (1), which is shaped like a letter when viewed from the side, and has an upright portion 0D at the front end.
The front end is attached to the front wheel bearing stand (2) by the mounting port (2), and the rear end is attached to the clutch housing (4) by the mounting port (2). Each is detachably attached.

There is a bonnet (5) between the upper ends of each mounting frame α and the raised part (b).
The left and right sides are integrally connected by a cylindrical connecting member at the front position thereof, and a top link mounting base aF3 is provided at the center of this connecting member α. The top link mounting base α9 has a plurality of mounting holes αG in the vertical direction, and the top link (to) is removably pivoted to the pivot pin αη. Furthermore, the top link (to) can be expanded and contracted like a turn pack. 0g is a mounting base attached to the inner side of the lower front corner of the mounting frame θQ via a reinforcing plate @, and a pivot pin @ that can be inserted and removed astride this mounting base α9 and the mounting frame Q(l) The lower link (to) and the lift cylinder (a) are removably pivoted.In other words, the lower link (2) and the lift cylinder (to) are located inside the mounting frame aO, that is, on the front vehicle bearing stand (2). Pivotally mounted within the width, front wheel bearing stand (2)
Lateral outward protrusions in the vicinity are minimized as much as possible.

The lower link arms have a pair of legs on the left and right, is it a tractor body (1)?
It is pivoted so that it can move up and down by a pivot pin in a state where it is pushed forward. Lift cylinder (to) is lower link (2)
For lifting and lowering, there is a pair of left and right υ corresponding to each lower link example, and one end of this lift cylinder (toward) is connected to a pivot pin □□□
It is connected to the lift arm (b) via.

The lift arm (goods) is pivoted on its axis mb through a connecting member so as to be able to move up and down, and at the front end of this lift arm (goods) there is a lift rod (towards) connected to each lower link (c). ) is pivoted. Note that the lower link example has pole joints at both ends. The chain is a check chain that fully controls the left and right swing of the lower link@, and can be freely adjusted for expansion and contraction using the turn pack 1v (7), and the check chain attachment cI is attached to the inside of each mounting frame α0). It is removably connected to a mounting pin coaxial with the pivot pin. (to) is a muzzleloading work machine. 2 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 via a spacer (to) with multiple mounting bolts (to). This front power take-off device (■) has a part on the rear side inserted under the fitter section (μ) of the bonnet (5). @ and the pivot pin C22 (c) of the lift cylinder arm are arranged. The front power take-off device (B) has an input shaft (B) and an output shaft (front PTO shaft) Cal, and the input shaft (■) is connected to the crankshaft of the engine (3) via the clutch rod and the transmission shaft. It is detachably connected to 14υ. Is (6) a pair of left and right? A contact member installed between the mounting frames QO and the front surface (2) of the front vehicle bearing stand (2).
a), the force acting on the pivot pin (c) via the lift cylinder (to) when the work equipment is raised, and the force acting on the pivot pin (c) via the lower link @ when backing up the work equipment are transferred to the front vehicle. ″
This is a pass that is transmitted to the front (2a) side of the bearing stand (2). In this case, the axes of the lift cylinder (to) and the lower link are configured to pass within the height range of the front surface (2a) of the front vehicle bearing stand (2). Top link (
) and a pair of left and right lower links @ constitute a three-point link mechanism.

In this way, the installation and drive system for front-mounted work equipment is constructed, but depending on the model of work equipment, the traditional power take-off device that only drives forward rotation has its limits, so instead There was a demand for a device capable of this, and the applicant has created and proposed a specific device.

That is, the companion shown in FIGS. 5 to 7 is one embodiment thereof.

To explain the overall mechanism, 331 is an FC power extraction case that combines the rear Cane round and front case H51 with port T461-..., and the upper and lower parts of the old case. Input shafts (b) facing in the front and rear directions, respectively.
and the output shaft (to) are mounted and these are connected to the bearing body (4η...
It is rotatably supported by... A forward rotation drive gear is fixed to the front end of the input shaft (support) via a rear part of the collar frame, and a reverse rotation drive gear (50) is fixed to the rear of the input shaft via a distance caffoo.

Each of these gears ← 9) has an oil path sister control, while 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 149). It is always engaged under the reduction ratio of , and is equipped with an idling gear (reversing driven gear) at the rear. Oil passages are formed in each of these gears (-), and a shifter shaft is provided between them, and by F5wJ the lever ■ and shift fork βη from the outside, the engaging teeth Q581 at the end of each driven gear 131Fi41
1581, and can be freely transmitted to the output shaft.

In this way, the input system and output system are configured, but how are the idler A7N 0591, input side idler 161, output side idler βυ, and their bearing means, etc., configured for the reverse transmission IO thread, in terms of position and support strength? The question here is whether it is constituted by such a relationship.

In consideration of these points, Jin's invention gave some consideration to the forward/reverse type power take-off device, and therefore, the feature here is that the power take-off case provided in the vehicle is equipped with a power take-off device for power take-off. The input shaft and the a-axis are mounted, and an idle shaft is mounted between the input shaft and the output shaft to make these three axes parallel to each other.

Further, on the outer periphery of the input shaft, a forward rotation drive gear and a reverse rotation drive gear are provided so as to be able to rotate together with the input shaft, while on the outer periphery of the output shaft, a forward rotation driven gear, a reverse rotation driven gear, and a reverse rotation driven gear are located between the two driven gears. The idler shaft is provided with an input side idler and an output side idler that are in constant engagement with the reverse rotation drive gear and the reverse rotation driven gear, respectively, and one end of the idle shaft is used to extract power. This is a forward/increase rotation switching type power take-off device in which the other end is supported on a shaft support wall protruding into the case inner space on the outer wall side of the case, and the shaft support wall and the input side idler are connected between both driven gears. They are located at points arranged correspondingly in the space of .

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

That is, in the front cane decoy, as shown in FIG. 6, an integral shaft support wall @3) is provided protruding into the inner space, and a pole-type bearing body is fitted in the center of the wall. The front end of this bearing body (idle shaft I9) is supported by a shaft, while the rear end is supported by a needle type bearing body 1471' in a bearing hole formed in the rear case in a rearwardly projecting manner. .

At the front of this idle shaft wing, there is a reverse drive gear 1511.
A large-diameter input idler that meshes with the input idler 10 is attached to the rear of the large-diameter input idler 10, and a small-diameter output idler 10 is attached to the rear of the input idler.
Particular consideration was given here to the driven gear l3 before and after the output system.
By making good use of the fact that the space between 1 and 41 is necessarily placed with a necessary front and rear space due to the presence of a shifter φ [etc. and are arranged in a corresponding manner. This eliminates the need for the shear idle system to be placed above the output yarn weft, and the case ha can be made more compact. The Combak F was made lighter and cheaper, and had increased rigidity, and since it was located lower than the output system, the oil lubrication performance was also improved.

Another feature is that, as mentioned above, since the output idler II) has a smaller diameter, the transmitted torque is also greater than that of the input idler 11, which is the larger diameter side, so both were supported by a single pole bearing. Naturally, a large load will be applied to the shaft end of the idler shaft on the output side, which has a small diameter, so we will take this into consideration and use a needle-type bearing body with a long bearing length for the rear end of the idler shaft. f47)'. Of course, in this case, since the size of the bearing capacity is the issue, two or more rows of pole bearings may be used instead of needles.

To supplementarily explain the constituent points of the above embodiment, FIG. Then, fix the mounting boss on the upper left side of the power take-off case (c).This is the mounting port (to) if it is a case G3 with only forward rotation as shown in the phantom line in Figure 6.・Correct 4
It is possible to arrange the points, but if one shoulder is idle and bulges out as in the solid line case in Figure 6, the bow cannot be placed in the correct position because of the positional restrictions with the external neighboring members. or difficult. Also, - is the case (4
31 is an oil supply part protruding from the front surface.

The present invention is as described above, and therefore, a gear is inevitably formed by the presence of a shifter or the like between the forward rotation driven gear and the reverse rotation driven gear disposed in the ninth power collection case for forward/reverse switching. By making good use of the space between them, the idler and the shaft support wall that protrudes from the inner space for supporting the idler shaft are arranged in a cohesive manner, making it lightweight, compact, strong, and inexpensive. Therefore, it has become possible to provide a forward/reverse switching type power extraction device.

It is to be noted that this invention is also planned to be implemented as a rear power extraction device or other power extraction device.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tofuctor 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 sectional view of the power take-off device. 6 is a sectional view taken along the line Vl-111 in FIG. 5, and FIG. 7 is a sectional view of other parts. (b)...Front power take-off device, @..., input shaft, (
To)...output...reverse drive gear, link...forward rotation driven gear, -)...reverse drive gear, 19)...idle shaft, -...input side idler, interest...・Output side idler, (631... shaft support wall. Patent applicant Kubota Iron Works Co., Ltd. Figure 3)

Claims (1)

[Scope of Claims] 1. An input shaft and an output shaft for extracting power are mounted on a power take-off cake provided in a vehicle, and an idle shaft is mounted between the input shaft and the output shaft so that these five shafts can be are in a parallel relationship with 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, while on the outer periphery of the φ shaft. The idler shaft is provided with a forward rotation driven gear, a reverse rotation driven gear, and a sick that is located between the two driven gears and selectively meshes with each other. A forward/reverse switching type power take-off device comprising an output 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 inner space of the case; A forward/reverse switching type power extraction device for a vehicle, characterized in that a shaft support wall and an input side idler are arranged correspondingly in a large assembly in a space between one driven gear.