JPH0242535Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a removable brake device for single-shaft simple mobile agricultural machinery such as Taylor-type cultivators and management machines. Supports a brake drum that can be inserted into and removed from one end of a single axle in the axial direction of the axle, and that can be freely engaged and removed while rotating integrally with the brake drum, and an operating shaft that can press the brake shoe against the brake drum. The present invention relates to a brake device for a mobile agricultural machine in which a braking mechanism is constructed by integrally assembling a casing in a relatively rotatable state.

In general, simple mobile agricultural machinery uses the Taylor-type method, in which a plowing wheel is attached directly to the axle, and the wheel is used for both plowing and forward movement, and the other is the Taylor-type method, in which the axle is equipped with a forward wheel. However, there are two types of use: a drive type in which a working device such as a rotary tiller is towed and connected via a hitch.

In the case of the Taylor type, the traveling speed during work is sufficiently low, and the ratchet wheel is mounted directly on the axle, making it possible to move and stop the machine only by engaging and disengaging the clutch. On the other hand, in the case of a drive type, there is an increase in weight due to the connection of a dedicated working device, and there are also uses for driving on the road at relatively high speeds while towing a rear car. It is necessary to provide a brake device on the axle.

However, in conventional braking devices, the casing is bolted to the transmission case of the mobile agricultural machine.
Since the structure includes a mounting part for fixing the rotation through a nut, if this is used, the bolt and nut must be removed each time the braking mechanism is attached or detached for the two types of use mentioned above. The detent of the casing must be engaged and disengaged through the casing, which is troublesome and requires a lot of effort.

The purpose of the present invention is to improve the above-mentioned drawbacks of attaching and detaching the brake mechanism.

A characteristic configuration of the present invention made to achieve such an object is that an engaging portion is formed in the transmission case,
and a member capable of engaging with the engaging portion is fixed to the casing, and as the braking mechanism is inserted into the axle, the member and the engaging portion engage,
The member and the engagement portion are brought into a state in which the casing is prevented from rotating with respect to the transmission case, and the engagement between the member and the engagement portion is released as the braking mechanism is pulled out from the axle. This is because it is arranged in conjunction with the joint.

In other words, by simply inserting the braking mechanism consisting of a brake drum integrally assembled with the casing from one end of the axle, the member provided on the casing engages with the engaging portion of the transmission case to prevent the casing from rotating. In addition, since the engagement between the member and the engaging portion is released only by extracting the braking mechanism from the axle, the effort required to prevent the rotation of the casing, that is, the braking mechanism, is reduced compared to the past. It is possible to reduce the trouble of attaching and detaching as much as possible, and the Taylor type,
We have now provided a mobile agricultural machine with great practical advantages that allows for easy, convenient, and quick use of two types of drive-type usage modes.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, a brake device for applying braking force to an axle shaft 2 having a hexagonal cross section protruding from a transmission case 1 of a walking type mobile agricultural machine A is configured. A drum that opens toward the transmission case 1 side is attached to a cylindrical member 4, which is a cylindrical shaft portion with a hexagonal cross section, that can be inserted into and removed from one end of the shaft in the axial direction and fixed in an integrally rotating state via a pin 3. The boss part 5a of the brake drum 5, which is a part of the brake drum 5, is fitted and fixed to the outside to form a braking rotating body 22, and a pair of brake shoes 6, 6 that can come into contact with the inner circumferential surface of the brake drum 5, and both brake shoes A pair of springs 7, 7 that bias the brake shoes 6, 6 inward in the radial direction, and both the brake shoes 6,
A casing 9 is fitted onto the cylindrical member 4 via a bearing 10 and held by an operating shaft 8 which can be pressed against the inner circumferential surface of the brake drum 5 against the urging force of springs 7 and 7. This constitutes a braking mechanism Z, and the casing 9 in the braking mechanism Z is fixed to prevent rotation through engagement between an engaging portion 12 and a rotation prevention member 13, which will be described later, thereby forming a brake device.

One end is attached to the boss portion 5a of the brake drum 5,
The cylindrical member 4 also serves as one positioning portion for the inner race of the bearing 10, and the other positioning ring 11 for the inner race is fitted onto the cylindrical member 4.

The casing 9 includes a plate 9A having a cylindrical attachment portion 9a for the outer race of the bearing 10, and a safety cover 9B that covers the outer periphery of the brake drum 5. a locking member 13 that can be engaged with the hole 12a of the engaging portion 12 attached to the axle from the axial direction of the axle; an operating lever 15 that can be attached to the operating handle 14 of the walking type mobile agricultural machine A; Of the spring 16 and the release wire 17 that link the arm 8a of the operating shaft 8, one receiving metal fitting 18 of an outer race 17a, which is one component of the release wire 17, is fixed.

The engaging portions 12 are fastened together using bolts and nuts 19 and 20 for fixedly connecting the half case portions 1A and 1B, which are constituent members of the transmission case 1.

A plurality of pin holes 21 for mounting a wheel are formed on the outer side of the cylindrical member 4 at appropriate intervals in the axle axis direction.

FIG. 4 shows another embodiment, in which the locking member 1
3 is made up of a round bar that can be inserted into one of the bolt insertion holes formed in the flange portions of the half case parts 1A, 1B, and the bolt insertion hole is also used as the engagement part 12. This is what I did. Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

Figure 1 is a side view of the entire walking-type mobile agricultural machine, Figure 2
3 are a longitudinal sectional view and an exploded perspective view of the brake device, and FIG. 4 is a front view of main parts showing another embodiment. 1... Transmission case, 2... Axle, 5... Brake drum, 6... Brake shoe, 8... Operating shaft,
9... Casing, 12... Engaging portion, 13... Rotating member, 22... Rotating body, Z... Braking mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A braking rotating body 22 consisting of a drum portion 5 and a cylindrical shaft portion 4 is attached to the end of a single axle 2 protruding from a transmission case 1 of a mobile agricultural machine. It can be attached and detached by inserting and removing it in the axial direction of the axle 2, and
A casing 9 supporting an operating shaft 8 that is attached to rotate integrally and that can press the brake shoe 6 against the drum portion 5 is attached to the cylindrical shaft portion 4 so as to be rotatable relative thereto and movable in the axial direction. A braking device for a mobile agricultural machine constitutes a braking mechanism Z that can be attached to and detached from the axle 2 by being fitted externally in a regulated state, and an engaging portion 12 is formed in the transmission case 1. and a member 1 that can be engaged with this engaging portion 12
3 is fixed to the casing 9, and as the braking mechanism Z is inserted into the axle 2, the member 1
3 and the engaging portion 12 engage, the casing 9 is prevented from rotating relative to the transmission case 1, and as the braking mechanism Z is pulled out from the axle 2, the member 13 and the engaging portion 12 are engaged with each other. A brake device for a mobile agricultural machine in which the member 13 and the engaging portion 12 are disposed in conjunction with each other in a state in which the engaging portion 12 is disengaged. 2. The brake device for a mobile agricultural machine according to claim 1, wherein the casing 9 also serves as a safety cover that covers the outer periphery of the drum portion 5.