JP2814056B2 - Brake clutch for steering of small traveling agricultural machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake clutch which is used to steer an agricultural tractor or other small agricultural machines and to brake the power transmitted to one of left and right wheels. is there.

[0002]

2. Description of the Related Art In general, in a small-sized traveling agricultural machine, as a means for turning the traveling direction, the turning side of the left and right wheels is braked, the power transmission is cut off, and only the other side wheel is driven. A so-called braking brake technique is used (for example, Japanese Utility Model Laid-Open No. 60-7428).

In this type of brake, in order to smoothly turn the traveling agricultural machine, an operation of performing braking and an operation of shutting off power during the turning operation are performed continuously in a short time. preferable. That is, if the power is cut off after the braking is started, or if the power is cut off before the braking is started, the course of the agricultural machine in progress is not stabilized, and the turning of the course is unstable. To In order to solve such problems, conventionally, when the turning operation is performed, the braking operation is first performed, and then the power of the brake is cut off after a very short time, and the mechanism of the braking brake is precisely manufactured. That is being done.

[0004]

However, if the operation to cut off the power transmitted to the wheels and the operation to perform braking are to be performed sequentially with a very short time difference,
It is necessary to extremely increase the precision of the mechanism for operating them, resulting in an increase in manufacturing costs.

[0005]

The present invention solves the above problems.
With turning clutch 40 and turning brakes 30, and their pushing element 50 for actuating the coordinated coaxially, composed of mainly 51 supporting it with actuation ball bearing 52 said pushing element 50, actuation ball bearing 52 Of the outer ring and the inner ring of the main body 5
1 means for operating the turning brake 30 on the side supported by 1;
In addition, the problem is solved by making the other side face the operating means of the turning clutch 40, respectively. Also, turning clutch
40 , a turning brake 30 , and a pressing element 50 for operating them are sequentially arranged on the support shaft 20, and the pressing element 50 supports an outer ring of an operating ball bearing 52. The operating means and the inner ring
And the operating means of the turning clutch 40 may be constituted by the inner cylinder 34 of the turning brake 30.

[0006]

When the traveling agricultural machine is turned, the presser 50 moves toward the turning brake 30 and the turning clutch 40.
One of them is operated by the inner ring of the operating ball bearing 52 provided at the end, and the other is operated by the outer ring. That is,
First, of the outer ring and the inner ring that form the working ball bearing 52, the side directly supported by the main body that forms the presser 50 operates the turning brake 30. Although moves to through the rolling ball indirectly supported by side at the same time turning the clutch 40 side by the principal, for axial gaps that exist between the inner ring and the outer ring, the turning clutch 40 side the turning It operates slightly later than the brake 30.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, reference numeral 10 denotes a braking clutch of a small traveling agricultural machine (not shown). Reference numeral 11 denotes a case in which the braking clutch 10 is housed.
b are overlapped on the overlapped surface 11c and fastened by bolts (not shown).

An input shaft 12 and an output shaft 13 project from the right side in the figure and are supported inside the case 11. That is, the output shaft 13 has a cylindrical shape rotatably supported by the ball bearing 14, and the input shaft 12 protrudes into the case 11 through the shaft hole of the output shaft 13.

The braking clutch 10 comprises a turning brake 30 and a turning clutch 40 supported on a support shaft 20. The turning brake 30 and the turning clutch 40 are composed of a multi-plate type friction plate 33, 43 and a pressing plate 31, 41 and a pressure receiving plate 3,
2 and 42, and press plates 31 and 41 and pressure receiving plate 3
The friction plates 33 and 43 are sandwiched between the clutch plates 2 and 42 to reduce the speed difference therebetween, which is a so-called wet type multi-plate clutch type. Reference numeral 50 denotes a presser for operating the turning brake 30 and the turning clutch 40, and is configured to be slidable on the support shaft 20.

Next, the structure of the main part of the brake clutch 10 will be described in detail. First, the support shaft 2 supporting the braking clutch 10
Reference numeral 0 denotes one end supported by the left case 11a by the bearing 21 and the other end formed with an outer spline, and is movably supported only in the axial direction by an axial hole of an inner body 45 of the turning clutch 40 described later. . Reference numeral 60 denotes an output take-out gear for taking out an output for work, which meshes with a drive small gear 61 that is spline-engaged with the support shaft 20. 6
Reference numeral 2 denotes an idle shaft for supporting the output take-out gear 60.

The pressing element 50 includes a main body 51 slidably supported on the support shaft 20 and an operating ball bearing 5 fitted to one end of the main body 51.
2 A notch groove 53 is formed at the other end of the main body 51 as shown in FIG.
4 are engaged. The cam 54 has a lower end portion of a rotating shaft rotatably supported by the left case 11a and cut off in a semicircular shape. Reference numeral 55 denotes an operation lever detachably attached to the upper end of the rotation shaft that forms the cam 54, and is connected to a turning handle (not shown) of the small traveling agricultural machine. Thus, when the turning handle is operated, the operating lever 55 is driven to rotate the cam 54, and the pusher 5
0 slides rightward in the figure.

An operating ball bearing 52 forming a part of the pressing element 50
Are hardened outer ring 52a and inner ring 52 made of steel.
b and a rolling ball 5 composed of a steel ball interposed between them
2c. In this embodiment, the outer periphery of the outer ring 52a of the working ball bearing 52 is press-fitted and supported in a shaft hole provided at an end of the main body 51, and the side directly supported by the main body 51 operates the turning brake 30. The side opposed to the pressing plate 31 serving as a means and indirectly supported via the rolling ball 52 c faces the inner cylinder 34 described later functioning as the operating means of the turning clutch 40.

The friction plate 33 of the turning brake 30 comprises a rotating friction plate 33a and a stopping friction plate 33b. The rotating friction plate 33a is locked on the inner cylinder 34 by a square spline 35, and the stopping friction plate 33b is
It is locked so as not to rotate by a stop pin 36 supported between a and 11b. And both friction plates 33
A plurality of sheets a and 33b are alternately arranged, and are sandwiched between the pressing plate 31 and the pressure receiving plate 32. The inner cylinder 3
4 is locked to the support shaft 20 by an involute spline 37 formed in an inner peripheral portion, and an inner body 45 of a turning clutch 40 described later by a bolt 38 at a right end portion in the drawing.
It is connected to.

The turning clutch 40 has a friction plate 43 disposed between an outer ring 44 supported at the end of the output shaft 13 by a spline 13a and the inner body 45.
3 is pressed and supported between the pressing plate 41 and the pressure receiving plate 42 by the clutch spring 46. The pressure receiving plate 42
Is connected to the inner cylinder 34 of the turning brake 30 by the bolt 38 as described above.

Next, the operation of the above embodiment will be described. First,
When the operating lever 55 is operated by a steering handle (not shown), the cam 54 is pressed to move the pressing element 31 rightward. Accordingly, the outer race 52a and the inner race 52b of the working ball bearing 52 supported by the pressing element 31 move toward the turning brake 30 and the turning clutch 40 simultaneously with the outer race 52a.
“a” pushes the pressing plate 31 of the turning brake 30 and advances to stop the rotation of the support shaft 20 via the friction plate 33.

On the other hand, when the inner race 52b attempts to move to the right, the inner cylinder 34 is located in front and the movement is temporarily prevented.
During this time, if the outer ring 52a still advances in the axial direction, the minute axial gap (not shown) existing between the outer ring 52a, the inner ring 52b, and the rolling ball 52c disappears. As a result, the outer ring 52a The progress in the axial direction is transmitted to the inner race 52b via the rolling ball 52c, and the turning clutch 40 is operated via the inner cylinder 34 of the turning brake 30 to operate the input shaft 12 and the output shaft 13
The power transmission between and is cut off.

Although the pressing element 50 supports the outer ring, the pressing element 50 may have a structure that supports the inner ring. In this case, the pressing element 50 operates the inner ring 30 and the outer ring 40 operates.

[0018]

As described above, the present invention utilizes the slight backlash in the axial direction of the operating ball bearing 52 following the operation of the operating lever to operate the turning brake 30 and to operate the turning clutch 4.
Because there is a time lag between the zero operation and
The time lag can be precisely obtained without the necessity of adjusting the minute amount. Moreover, since the working ball bearing 52 is inexpensive,
This has the effect of suppressing an increase in the price of the device.

[Brief description of the drawings]

FIG. 1 is a sectional view of a brake clutch showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II.

[Explanation of symbols]

 10 ... Brake clutch 11 ... Case 11a ... Left case 11b ... Right case 11c ... Stitched surface 12 ... Input shaft 13 ... Output shaft 13a ... Spline 14 ··· Ball bearing 20 ··· Support shaft 21 ··· Bearing 30 ··· Deflection brake 31, 41 · Pressing plate 32, 42 · Pressure receiving plate 33, 43 · Friction plate 33a ··· Rotating friction plate 33b ・ ・ ・ Stopping friction plate 34 ・ ・ ・ ・ ・ ・ Inner cylinder 35 ・ ・ ・ ・ Square spline 36 ・ ・ ・ ・ ・ ・ Stopping pin 37 ・ ・ ・ ・ Involute spline 38 ・ ・ ・ ・ Bolt 40 ・ ・ ・ ・ Turn Clutch 44 ... Outer ring 45 ... Inner body 46 ... Clutch spring 50 ... Presser 51 ... Main body 52 ... Working ball bearing 53 ... Notch groove 54 semicircular cam 55 operating lever 60 ··· Output output gear 61 ··· Drive small gear 62 ··· Idle shaft

Claims (2)

(57) [Claims] 1. A a pushing element 50 for actuating the turning clutch 40 turning brakes 30, and their coordinated coaxially entity 51 for supporting it with actuation ball bearing 52 said pushing element 50
Of the outer ball and the inner ring of the operating ball bearing 52, the side supported by the main body 51 is opposed to the operating means of the turning brake 30, and the other side is opposed to the operating means of the turning clutch 40. A steering brake clutch for small-sized traveling agricultural machines. 2. A turning clutch 40 , a turning brake 30 , and a pressing element 50 for operating the turning clutch 40 and the turning braking element 30 are sequentially arranged on a support shaft 20, and the pressing element 50 supports an outer ring of an operating ball bearing 52.
And the actuating means of the outer ring the turning brakes 30, also configured with to respectively face the inner ring and the actuating means of turning the clutch 40, the inner cylinder 34 of the turning brakes 30 actuating means of the turning clutch 40 A steering clutch for steering small agricultural machines.