JPH0323405Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] As shown in FIG. The present invention relates to a stand bar mounting structure for wheel replacement of a tiller, which is used when replacing wheels while making the tiller stand up on its own, and more specifically relates to a structure for mounting a stand bar for wheel replacement on a tiller, which is provided with a bracket for inserting and fixing the stand bar for wheel replacement into the main body frame.

[Conventional technology]

Conventionally, as a stand bar mounting structure for replacing wheels of this type of tiller, a bracket 7 has been fixed directly to the web surface of a main body frame 1 having a groove-shaped cross section, as shown in FIG.

[The problem that the idea attempts to solve]

However, since the bracket is attached to the vertically elongated web part of the main body frame, the load from this bracket acts locally on the bracket attachment part of the main body frame, resulting in an excessive load than the intended setting value. When this occurs, there is a problem in that the main body frame is locally deformed around the bracket mounting portion.

The purpose of the present invention is to provide a device that can overcome the drawbacks of the conventional device by making simple modifications without increasing the size of the main body frame structure.

[Means to solve the problem]

The characteristic configuration of this invention is that the main body frame has a pair of left and right groove-shaped cross sections that extend forward from the transmission case that supports the wheels, and the groove-shaped openings face laterally outward in the width direction of the aircraft. an auxiliary frame having a groove-shaped cross section, with both longitudinal ends of the auxiliary frame in contact with the flange portion of the main body frame, and both ends of the cantilevered flange portion of the auxiliary frame contacting the main body frame. A bracket is fitted and fixed to the groove-shaped part of the main body frame in a state where it is in contact with the web part which is the bottom surface of the groove-shaped part, and a stand bar for wheel replacement is attached and fixed to the outer surface of the web part of this auxiliary frame itself. The functions and effects are as follows.

[Effect]

In other words, the auxiliary frame is fixed to the mounting location of the bracket, and both longitudinal ends of the auxiliary frame are in contact with the flange portions of the main body frame, and both ends of the auxiliary frame at the cantilevered flange portions are in contact with the flange portions of the main body frame. Since the tip is in contact with the web part of the main body frame, a box-shaped bracket mounting structure is formed by the cooperation of the main frame and the auxiliary frame, so that the load acting on the bracket is received by this box-shaped structure. By doing so, you can actually increase the strength of the main body frame. Moreover, since the auxiliary frame is fixed to the flange portion of the main body frame, the flange portion, which hardly contributed to the strength structure of the main body frame in the conventional structure, can be incorporated into the strength member.

[Effect of idea]

As a result, there is no need to increase the strength of the entire body frame with only the auxiliary effects of local auxiliary frames on the body frame, which would result in an increase in the size of the entire body structure. Since the flange portion can also be incorporated as a strength member, the original structure of the main body frame itself can be effectively utilized.

〔Example〕

As shown in Fig. 5, left and right main body frames 1, 1 with a grooved cross-section extending forward from a transmission case 3 are arranged so that the opening of the groove-shaped cross-section is lateral in the width direction of the aircraft. The main body frames 1, 1 are provided so as to face outward, and the front ends of the main body frames 1, 1 are connected by a horizontal member. An engine 2 is mounted on a pair of left and right main body frames 1, 1, and left and right propulsion wheels 4 are mounted on the lower end of a transmission case 3.
4 is pivotally supported, and a tilling rotary 5 and a grounding tail wheel 6 are provided at the rear end of the body to constitute a walking type cultivator.

To explain the stand bar 8 for wheel replacement in detail, a small diameter portion 8a is provided at the upper end of the round bar-shaped main body 8A, and after the small diameter portion 8a is inserted into a small hole 7a on the upper surface of a bracket 7 (to be described later), the small diameter portion 8a is removed. A hole 8b for the β pin 10 is provided for locking. On the other hand, a grounding support 9 is supported on the lower end side of the round rod-shaped main body 8A so as to be relatively swingable, and good grounding is achieved despite the inclination of the stand bar 8 to the ground, which inclines to the ground as the main body inclines from side to side during replacement work. Now you can get a good attitude.

For such a stand bar 8, a bracket 7 that is attached to the main body frame 1 so that only the lower surface is open has a small hole 7a for inserting the small diameter portion 8a of the stand bar 8 in the upper surface, and the small diameter portion 8a of the stand bar 8 is inserted into the bracket 7. The main body load is transmitted to the stand bar 8 by inserting the portion 8a.

Then, for the main body frame 1 having a groove-shaped cross section,
The auxiliary frame 11 having a groove-shaped cross section is placed in a state in which both longitudinal ends of the auxiliary frame 11 are in contact with the flange portions 1A, 1A of the main body frame 1, and the cantilevered flange portions 11A, 11A of the auxiliary frame 11,
It is fitted and fixed into the groove-shaped cross section of the main body frame 1, with both tips 11A in contact with the web portion 1B of the main body frame 1. A belt-shaped auxiliary member 12 is fixed to the lower end of the bracket 7 fixed to the auxiliary frame 1, and the stand bar 8 is fixed at two points: the small hole 7a on the upper surface of the bracket 7 and the lower end of the bracket 7. This lower end is reinforced when it is received.

To perform wheel replacement work using the stand bar 8 as described above, first insert the upper end of the stand bar 8 into the bracket 7, and attach β to the small diameter portion 8a of the stand bar 8 protruding from the upper surface of the bracket 7.
With the pin 10 inserted and fixed, the cultivator is tilted forward to obtain a three-point ground contact state between the stand bar 8, the front end of the body frame 1, and the non-replaceable wheel 4.

[Brief explanation of drawings]

The drawings show an embodiment of the stand bar mounting structure for replacing wheels of a power cultivator according to the present invention. Fig. 1 is an exploded perspective view of the stand bar and a bracket on the machine frame side, and Fig. 2 shows the stand bar attached to the bracket. A vertical cross-sectional view showing the state in which the
4 is a rear view showing the operation state of the stand bar, FIG. 5 is a side view showing the tiller in a forward tilted state during wheel replacement work, and FIG. 6 shows the conventional bracket installation state. FIG. 1...Body frame, 1A...Flange part, 1B...
Web part, 3...Transmission case, 4...Car part, 7...Bracket, 8...Stand bar, 11...Auxiliary frame, 11A...Flange part, 11B...Web part.

Claims (1)

[Scope of utility model registration request] A pair of left and right main body frames 1, 1 each having a groove-shaped cross section are extended forward from a transmission case 3 that pivotally supports wheels 4, with the openings of the grooves facing laterally outward in the width direction of the fuselage. An auxiliary frame 11 having a groove-shaped cross section is provided, with both longitudinal ends of the auxiliary frame 11 in contact with the flange portions 1A, 1A of the main body frame 1, and a cantilevered flange portion 11A of the auxiliary frame 11. , 11A are fitted into and fixed to the groove-shaped portion of the main body frame 1, with both ends of the auxiliary frame 11 in contact with the web portion 1B, which is the groove-shaped bottom surface of the main frame 1, and the web portion 11B of this auxiliary frame 11 itself. This stand bar mounting structure for wheel replacement of a tiller is provided with a bracket 7 on the outer surface for mounting and fixing a stand bar 8 for wheel replacement.