JPS6315397Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a holding structure for a muzzle-mounted working machine for a tractor. The present invention relates to a holding structure that allows easy handling when using a take-out shaft.

In the conventional holding structure of tractor muzzleloading equipment,
A front axle frame is provided to protrude forward from the tractor body, a first holding member is provided to protrude downward from the front-rear midway part of the front axle frame, and a work implement is pivotably pivoted vertically under the first holding member. A second holding member is attached to the front end of the front axle frame, and the second holding member is provided with a drive unit such as a hydraulic cylinder that drives the working machine up and down.

However, in the conventional configuration, for example, when a soil removal plate serving as a working machine is attached to a tractor using the above-mentioned holding structure and the tractor is loaded with weight and travels on a rough road, the second holding member to which the hydraulic cylinder is attached is moved forward. Since it was attached to the front end of the front axle frame, stress was applied to the front end of the front axle frame, causing problems such as damage to this part.

The present invention was devised in view of such conventional problems, and allows a front-mounted work machine to be held on a tractor with a simple structure and high strength and durability, and also uses a power take-off shaft. The purpose of this is to provide a holding structure that can be easily accommodated in cases where the front axle frame is to be used in a tractor. A first holding member is provided in a protruding manner, and a working machine is pivotally supported on the lower side of the first holding member so as to be able to swing vertically.Furthermore, a second holding member is attached to the front end of the front axle frame, and a second holding member is attached to the front end of the front axle frame. In a device in which the holding member is provided with a drive unit for vertically swinging the working machine, and a power take-off shaft 47 is provided on the first holding member 14 side, the first holding member and the second holding member are connected to the front half shaft frame. The vertically intermediate portion of the first holding member and the lower side of the second holding member are connected and fixed via an upper connecting member placed at an upper position of the front axle frame. Further, the lower side of the first holding member and the lower abdomen of the tractor body are removably connected and fixed via the third holding member.

Hereinafter, embodiments of the present invention will be explained according to the drawings.
An engine 2 is mounted on the front part of the tractor 1, and a clutch housing 3 and a transmission case 4 are successively connected to the rear of the engine 2, and these constitute a tractor body 5.

A pair of left and right front axle frames 6, 6 are attached to bolts 7 on both sides of the crankcase at the bottom of the engine 2.
The front ends of the front axle frames 6, 6 protrude forward. A front axle 8 whose axis is lateral is pivotally supported on the lower surface of the front axle frames 6, 6 so as to be vertically swingable, and front wheels 9 are connected to both ends of the front axle 8.

Further, a radiator, battery, etc. related to the engine 2 are mounted on the upper surface of the front axle frames 6, 6, and these are mounted on the bonnet 10 together with the engine 2.
The upper part of the transmission case 4 between the rear part of the bonnet 10 and the rear wheels 11 connected to both sides of the rear part of the transmission case 4 is the control section of the tractor 1, and includes a steering handle 12, a speed change lever 13, etc. is provided.

A first holding member 14 having a U-shape in plan and opening rearward is provided at a position in front of the front axle 8 at the front and rear midpoints of the front axle frames 6, 6, and the left and right opposing one outer surface of the first holding member 14 is provided. are respectively the front axle frame 6,
6 and is removably fixed by a first bolt 15, and the first holding member 14 has a rectangular cylindrical holding rod 16 placed laterally to the hole center on its lower end side and is removably attached via a flange bolt assembly 17. In preparation for this, in the embodiment shown in FIG. 2, the joint 17 is oriented in the longitudinal direction, and in the embodiment shown in FIG. 3, the joint 17 is arranged in the vertical direction.

A bumper 18 with a U-shaped side cross section and a rear opening is installed at the front ends of the front axle frames 6, 6, and a second holding member 19 is attached to the bumper 18, and a second holding member 19 is attached to the bumper 18.
A drive section 21, which is a hydraulic cylinder, is detachably provided on the holding member 19 and drives the work implement 20 in vertical swinging motion. The second holding member 19 is attached to the bumper 1
8. A rigid front plate 22 that abuts the front surface, and fixed plates 23 that face the rear of both left and right ends of the front plate 22, respectively.
The free ends of the left and right ends of the bumper 18 are connected to the front plate 22 and the fixing plate 23 via the second bolts 24.
The front plate 22 is fixed to the bumper 18 by sandwiching the front plate 22 with the bumper 18. A channel-shaped vertical rod 25 is provided near one side of the front surface of the front plate 22, one end of a driving section 21 is pivotally connected between the upwardly projecting ends of the vertical rod 25, and the other end of the driving section 21 is It is pivotally connected to the frame 20A.

The frame body 20A has a pin 2 that can be inserted into and removed from a pair of left and right arms 26 formed on the first holding rod 16.
A working machine 20 is provided at the front end of the frame body 20A and is shown as a soil removal plate.
1, the working machine 20 can be driven to swing up and down. Further, a second vertical rod 28 is provided on the other side of the front surface of the front plate 22 in parallel with the vertical rod 25,
The second vertical rod 28 and the first vertical rod 25 facing the second vertical rod 28 are each provided with an insertion hole 29 on the same axis as the horizontal axis. A plurality of corresponding insertion holes 29 are formed at equal intervals in the direction.
A pivot pin 30 is removably connected to the top link 31 of a three-point link mechanism for mounting various working machines 20. Note that the frame 20A constitutes a lower link of the three-point linkage mechanism.

At the upper/lower position of the front axle frame 6, the first
The holding member 14 and the second holding member 19 are connected and fixed by a pair of left and right upper and lower connecting members 32 and 33, respectively. The upper connecting member 32 has a bent piece 3 that is locked to a rear bent part 34 at the top of the first holding member 14.
5, and a bolt body 36 whose one end is fixed to the bent piece 35 and whose other end is inserted through the upper part of the front plate 22 and screwed with a nut. It is designed to be pulled to. Further, one end of the lower connecting member 33 is screwed to the lower part of the front plate 22 via a nut, and the other end is a protruding piece 37 on the outer surface of the left and right opposing side of the first holding member 14.
It consists of a bolt body 38 screwed into the body with a nut.

The front end of the third holding member 39 is detachably attached to the lateral midway part of the holding rod 16 that is detachably provided at the lower part of the first holding member 14 via the coupling body 17, or is fixed by welding or the like. The rear end of the third holding member 39 is once tilted rearward and downward from its front end and bypasses the lower part of the front axle 8, and is then freely attachable to and detachable from the lower surface of the clutch housing 3, which is the tractor body 5, via a bolt 40. The lower part of the first holding member 14 and the tractor body 5 are removably connected to each other via the third holding member 39. In this case, the third holding member 39 also has the function of protecting the front axle 8 by preventing interference between the front axle 8 and obstacles on the ground.

Further, a power transmission shaft 41 supported rotatably around the axis in the longitudinal direction of the axis is provided on the upper front surface of the first holding member 14, and a transmission shaft case 42 includes a bearing for supporting the transmission shaft 41. is fixed to the front surface of the first holding member 14 via a flange and bolt, and the rear end of the transmission shaft 41 is connected to the upper notch 43 of the first holding member 14.
The transmission shaft 41 is interlocked with the crankshaft of the engine 2 through a coupling ring 44, a coupling shaft 45, etc., and a transmission shaft pulley 46 is attached to the front end of the transmission shaft 41. In addition, at the lower front of the first holding member 14,
A power take-off shaft 47 is provided as an output shaft which is parallel to the transmission shaft 41 and is rotatably supported around the shaft, and includes a bearing for supporting the power take-off shaft 47.
The PTO shaft case 48 is fixed to the front surface of the first holding member 14 via a flange and bolts, and is attached to the power take-off shaft 4.
A PTO shaft pulley 49 on which a belt 50 is wound together with the transmission shaft pulley 46 is attached to the front end of the power take-off shaft 47 , and a spline is formed at the front end of the power take-off shaft 47 . work machine 20,
For example, it is interlocked and connected to a drive section of a mower working machine through a universal joint shaft or the like.

Further, referring to FIG. 2, a pair of left and right reinforcing bodies 51 are attached between the lower ends of the front plate 22 and the fixed plate 23, and the reinforcing bodies 51 and the holding rod 16 are connected to each other by a turnbuckle. 52 to improve strength.

Also, referring to FIG. 7, the coupling ring 44,
Details of the connection structure between the engine crankshaft and the transmission shaft 41 through the connection shaft 45 and the like are shown.

That is, a threaded portion 53 and a splined portion 54 are formed on the coupling shaft 45, a splined portion 55 is formed on the transmission shaft 41, both splined portions are connected with respective coupling rings 44, and a double nut 56 is screwed into the threaded portion 53. This stops the movement (backlash) of the coupling ring 44 and prevents fretting (oxidative wear) of the spline portion.

In addition, in FIG. 4, 57 denotes a diagonal plate.

In addition, in the embodiment, the first holding member 14 includes the holding rod 1.
6 can be attached and detached with a connecting body 17, but the retaining rod 16
is integrally formed with the first holding member 14, and the holding rod 16
Or the third holding member 14 is connected to the third
The front end of the holding member 39 may be made detachable.

According to the present invention, since the first holding member 14 and the second holding member 19 are connected and fixed at the upper and lower positions of the front axle frame 6, the second holding member 19
The concentration of stress on the front end of the front axle frame 6 due to the load on the front axle frame 6 was avoided, and the overall strength was improved. Furthermore, since the lower part of the first holding member 14 and the tractor body 5 are connected and fixed via the third holding member 39, the first holding member 14
The amount of bending moment applied to the portion that is fixed to the front axle frame 6 has been reduced, and the overall rigidity has been improved.

Moreover, since the third holding member 39 is detachable between the lower abdomen of the tractor body 5 and the first holding member 14, the third holding member 39 is attached to the power take-off shaft 4.
In the case of work equipment that performs 7-stroke work or stationary work, this is not necessary and can be done easily and cheaply.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, FIG. 1 is an overall side view thereof, FIG. 2 is an enlarged view of main parts according to the first embodiment shown in FIG. 1, and FIG. 3 is according to the second embodiment shown in FIG. 1. 4 is a partial cross-sectional view taken along the line A-A in FIG. 2; FIG. 5 is a partial cross-sectional view taken along the line B-B in FIG. 2;
Figure 6 is a view taken along the line C-C in Figure 2, and Figure 7 is a view of the 3rd line.
It is an enlarged sectional view taken along the line D-D. 1...Tractor, 5...Tractor body, 6...
Front axle frame, 14...first holding member, 20...
... Working machine, 19... Second holding member, 21... Drive section (hydraulic cylinder), 39... Third holding member.

Claims (1)

[Claims for Utility Model Registration] A front axle frame 6 is provided to protrude forward from the tractor body 5, and a first holding member 14 is provided to protrude downward from the front and rear middle portions of the front axle frame 6. A working machine 20 is pivotally supported on the lower side of the 14 side so as to be able to swing vertically, and furthermore, a second holding member 19 is attached to the front end of the front axle frame 6.
A drive unit 21 for vertically swinging the work implement 20 is provided on the side, and a power take-off shaft 47 is provided on the first holding member 14 side.The first holding member 14 and the second holding member 19 Upper connecting member 3 placed above the frame 6
2, and the vertically intermediate portion of the first holding member 14 and the lower side of the second holding member 19 are
The front axle frame 6 is connected and fixed via a lower connecting member 33 disposed at a lower position, and furthermore, the lower side of the first holding member 14 and the lower abdomen of the tractor body 5 are connected to each other.
A holding structure for a tractor muzzle-mounted working machine, characterized in that it is detachably connected and fixed via a third holding member 39.