JPH0373490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a traveling operation structure that is equipped with a differential mechanism capable of being in a defrocked state and a brake mechanism for a traveling axle, and is used by being mounted on, for example, a rice transplanter.

[Conventional technology]

Conventionally, in this type of travel operation structure, the member that acts on the drum of the travel brake and the shift member that can engage with the differential case that creates the defrot state are separate members (for example,
52-91921, or Japanese Utility Model Application Publication No. 57-10970).

[Problem that the invention seeks to solve]

Therefore, operating members are required for each of the travel brake and the differential lock mechanism, resulting in an increase in the number of parts.

An object of the present invention is to provide a device that can simplify the equipment configuration by rationally arranging the shift member for the defrock.

[Means for solving problems]

The characteristic configuration of the present invention is that side brakes connected to left and right brake operating tools are provided near both ends of an axle having a differential mechanism, and the side brakes are located between one side brake and the differential mechanism to A shift member capable of sliding forward and backward along the center is provided on the axle, and the shift member is moved toward the differential mechanism to create a deflock state. A deflock operation tool and the shift member are operated in opposite directions to operate the brakes. One of the handbrake operating tools that indicates the state is linked to the shift member,
Its effects are as follows.

[Effect]

In other words, by focusing on the fact that the brake mechanisms are provided on both sides of the differential mechanism, and by simply providing a shift member that can be slid in the forward and reverse directions between one side brake and the differential mechanism, this shift member can be moved in one direction. Sliding in one direction acts on the differential case to create a differential lock state, and sliding in the opposite direction acts on the brake to operate the brake.

〔Effect of the invention〕

As a result, the structure can be simplified by combining the operating member for one handbrake and the shift member for the differential lock, and particularly in a structure in which the differential mechanism and the handbrake mechanism are disposed close to each other, Since only one shift member is required to act on both, the arrangement of the shift member itself becomes easy.

〔Example〕

As shown in Figure 4, engine 1 is installed at the front of the aircraft.
At the rear end of the passenger vehicle body A, in which the transmission case 2 is arranged and the driver's seat 3 is provided in the middle, a link mechanism 5 that can be raised and lowered by a hydraulic cylinder 4 is installed.
A seedling planting device B consisting of a seedling stand 6, a planting mechanism 7, and a grounding float 8 is interlocked to form a riding rice transplanter.

The transmission structure of the rear wheels 9, 9 pivotally supported on the passenger vehicle body A will be described in detail. As shown in Figure 3,
A pair of left and right main frames 10, 10 with forward and backward postures.
Near the rear end, a pair of front and rear plate frames 11,1
1, and a rear transmission case 13, which is transmission-connected to the transmission case 2 via a transmission shaft 12, is attached to the plate-shaped frames 11,11.
The plate frames 11, 11 are connected to the mission case 2 via reinforcing rods 14 to form a rigid structure. Gear cases 15A and 15B are connected to both ends of the rear transmission case 13,
Rear wheels 9, 9 are pivotally supported at the lower ends of the gear cases 15A, 15B, respectively.

Above the transmission shaft 12 is a driving section deck 16.
is stretched and protrudes above the deck 16, and a pair of left and right side brake foot operating tools 17A, 17
B is provided. The hand brake foot operating tools 17A, 17B include left and right operating shafts 18A, 18B protruding from the rear transmission case 13, and left and right swinging arms that can swing integrally with the hand brake foot operating tools 17A, 17B. 19A, 19B are connected to left and right connecting rods 20A, 20, which are an example of a linking mechanism.
They are interlocked and connected at B to enable braking and turning operations. A foot operating tool 21 for a defroster is provided protrudingly on the deck 16 on the side of the driver's seat 3, and the lower end of this operating tool 21 is relatively swingably connected to one end of a bell crank 22 that can swing up and down around the horizontal support axis X. At the same time, a fixing pin 23a of a plate member 23 fixed to the intermediate portion of the right connecting rod 20B is fitted into an engaging hole 22a of the bell crank 22, thereby forming a differential linking mechanism 24.

The right swing arm 19B and the right connecting rod 20B
A long hole 19a is formed in the connecting portion of the right connecting rod 20B in the moving direction, and the defrock foot operating tool 2
Despite the operation of the right connecting rod 20B, which is operated in the opposite direction to the direction of operation by the right side brake foot operation tool 17B, the right side brake foot operation tool 17B is in a standby state. It is designed not to operate. Further, the engagement hole 22a of the bell crank 22 is also formed into a long hole that is long in the operating direction of the right connecting rod 20B, and the defroc foot operation tool 21 is in a standby state even when the right hand brake foot operation tool 17B is operated. is no longer working.

Reference numeral 25 in the figure is a planting lift lever, which is connected to an operating shaft linked to the control valve 26 for the hydraulic cylinder 4 via a moon-shaped arm 27, a tension spring 28, a swing arm 29, and a connecting rod 30. The operating arm 39 of the planting clutch 31 is interlocked and connected so that the planting clutch 31 can be turned on and off.

The rear transmission case 13 and the left and right gear cases 15
The structure of A and 15B will be explained in detail. As shown in FIGS. 1 and 2, a bevel gear 32 is fitted to the inner end of the rear transmission case 13 of the transmission shaft 12, and a differential case 33 constituting the differential mechanism 40
It is configured to be able to engage with a bevel gear 34 fitted externally. The differential case 33 includes differential side gears 35, 35 and differential pinion gears 36, 36 internally, and a left and right transverse transmission shaft 37A constituting an axle on which the differential side gears 35, 35 are externally fitted with splines.
It is configured to be transmission connected to the left and right gear cases 15A and 15B via 37B. A right shift member 38B that is slidable in the direction of the axis Y is fitted onto the outer end of the right lateral transmission shaft 37B by a spline, and this right shift member 38B has a claw portion 38a that can engage and disengage from the differential case 33; An engagement portion 38b with the shift fork 46 operated by the right operation shaft 18B linked to the right side brake and defroc foot operation tools 17B and 21, and a right friction multi-disc brake 41B to be described later. Contact sleeve part 38c
It is made up of. From the above configuration, when the right hand brake foot operating tool 17B is depressed, the right connecting rod 20B is pulled in the direction of the operating tool 17B, the operating shaft 18B is rotated, and the right shift member 38A is shifted to the right side brake 41B. It comes to work. Furthermore, when the differential foot operating tool 21 is depressed, the right connecting rod 20B is pushed in the opposite direction to the operating tool 17B, and the shift member 38A is pushed.
operates in a direction to engage with the differential case 33.

On the opposite side to the side where the right shift member 38B is located, a shift member 38A that is slidable in the axial direction is fitted onto the left horizontal transmission shaft 37A with a spline,
The left hand brake 4 is attached to this left shift member 38A.
A sleeve portion 38d that acts on the brake lever 1A and a portion 38c that engages with a shift fork linked to the left side brake foot operating tool 17A are provided.

The left and right friction multi-disc side brakes 41A, 41B are provided on the sideways transmission shaft sides of the left and right connecting shafts 42A, 42B which are disposed abutting against the left and right horizontal transmission shafts 37A, 37B, and the left and right side brakes 41A. , 41B, a spline portion for integral connection with the left and right shift members 38A, 38B is formed on the inner end side. In addition, the left and right connecting shaft 42
Gear cases 15A, 15 are on the other end side of A, 42B.
Gears 43, 43 located within B are provided, and the engine 1 is connected to the traveling axle 45 via the two-stage reduction mechanism
The driving power is transmitted from the

[Another example]

(a) The defrock operating tool 21 and the handbrake operating tool do not have to be foot-operated.

(b) The above embodiment may be applied not only to rice transplanters but also to other agricultural vehicles and general vehicles.

(c) Running wheels may be provided on the horizontal transmission shafts 37, 37.

[Brief explanation of drawings]

The drawings show an embodiment of the travel operation structure according to the present invention, in which FIG. 1 is a longitudinal cross-sectional view showing a differential lock mechanism and left and right side brake mechanisms, and FIG. 2 is a cross-sectional view showing a shift member for the differential lock and hand brakes.
FIG. 3 is a side view showing the operating structure of the deflock mechanism and left and right side brake mechanisms, and FIG. 4 is a side view of the riding rice transplanter. 17A, 17B... Brake operating tool, 21...
Defrot lock operating tool, 37A, 37B...Axle, 3
8B...Shift member, 40...Differential mechanism, 41
A, 41B...Handbrake.

Claims (1)

[Claims] 1 Left and right brake operating tools 17A, 1 are installed near both ends of the axles 37A, 37B having the differential mechanism 40, respectively.
Handbrake 41A, 41B linked to 7B
and one side brake 41B.
and the axle 37B located between the differential mechanism 40 and the
A shift member 38B that can be slid forward and backward along the axis of
is provided on the axle 37B and moves the shift member 38B toward the differential mechanism 40 to create a deflock state; and the shift member 38.
A traveling operation structure in which one handbrake operating tool 17B, which operates B in the opposite direction to bring out the brake operating state, is linked to the shift member 38B.