JPH0620337Y2 - Bracket structure for connecting work equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a connecting bracket structure for a work machine for connecting work machines to the front and rear of a passenger work vehicle or the like.

[Technology underlying the present invention]

It is known that a work machine for carrying out a predetermined work, for example, lawn mowing, on the front of the vehicle body of a passenger work vehicle or the like is attached to the front of the vehicle body (so-called front mower type lawn mower) which is hung and supported so as to be vertically movable. . In this type of lawnmower, a belt transmission method is often used as a means for transmitting the output of the engine to the cutter blade.

That is, a considerably long belt is stretched between a vertical drive pulley arranged on the engine side mounted on a passenger work vehicle and a horizontal driven pulley provided on a cutter housing, and a belt fed in a vertical state is midway. It is a method of transmitting a predetermined rotational force by converting it into a horizontal direction and winding it around a driven pulley. The advantage of adopting such a belt transmission system is that when mowing grass grown on undulating ground, the cutter housing swings up and down according to the undulation of the ground, which causes slack or tension in the belt. The transmission method is such that the slack or tension of the belt is easily adjusted by following the vertical swing.

However, in the case of this belt transmission system, as described above, the lawn mower is arranged in front of the vehicle body, and the distance between the drive pulley on the engine side and the driven pulley for rotating the cutter blade is considerably long, and in a vertical state. Since it is a system that converts the fed belt horizontally in the middle and winds it around a driven pulley to transmit a predetermined rotational force, at least the connection of the lawn mower to the passenger work vehicle, the phase conversion of the belt, the belt Tension pulleys have to be installed to provide a predetermined tension, and therefore such connection or installation of tension members has to be done by brackets mounted in the front position of the vehicle body.

However, in the past, the bracket for connecting the lawn mower to the front part of the vehicle body and the bracket for converting the phase of the belt and the arm for supporting the tension pulley for applying the belt tension are independent from each other. As a matter of fact, it was actually equipped on the lower front part of the vehicle body. Therefore, there was a considerable space limitation, and weakness was found in terms of the attachment strength of the bracket and the connection strength.

[Means and Actions for Solving Problems]

The present invention has been made in view of the above circumstances, and is a passenger work vehicle capable of performing a predetermined work by connecting a predetermined work machine to a predetermined lift device arranged in front of or behind a vehicle body. In addition, the base end of the support frame of the working machine that can be lifted and lowered by the lifting device is attached to a pair of brackets attached to the left and right front ends or the left and right ends of the rear end of the passenger work vehicle, and the PTO of the passenger work vehicle is attached. A tension arm equipped with a tension pulley for supporting the belt wound between the drive pulley attached to the drive pulley and the driven pulley attached to the driven part of the working machine is configured to be attached, and thus installed in front of the passenger work vehicle. For example, attaching a support frame such as a front mower type lawn mower,
The phase change of the belt wound between the drive pulley attached to the PTO and the driven pulley directly connected to the blade of the lawn mower and the tension arm attached with the tension pulley can be combined with the pair of brackets to reduce the number of parts. An object of the present invention is to provide a bracket structure for connecting working machines, which can reduce the number and improve the rigidity of the bracket.

〔Example〕

Hereinafter, an embodiment of a bracket structure for connecting a working machine according to the present invention will be described in detail with reference to the accompanying drawings.

In this embodiment, a front mower type lawnmower will be described as an example.

FIG. 1 shows the main part of a front mower type lawnmower, and 10 is a passenger work vehicle equipped with a lawn mower 11.
Reference numeral 12 denotes a hydraulic cylinder mounted on the front of the passenger work vehicle 10, and the lawn mower 1 is provided via a lift arm 12a of the hydraulic cylinder 12 and a lift rod 12b connected to the lift arm 12a.
1 is suspended and can be raised and lowered.

On the other hand, the rotation of the cutter blades (described in the present embodiment as being equipped with three blades) 13a ... Installed in the cutter housing 11a of the lawn mower 11 is performed by the engine 10a of the passenger work vehicle 10 (see FIG. 2). Drive pulley 10b attached to the PTO and a driven pulley 14 placed on the upper surface of the lawn mower 11.
(Attached to the rotating shaft of the central cutter blade)
It is made to be made through a belt 15 that winds around. Reference numeral 16 is an idle roller arranged diagonally forward of both sides of the driven pulley 14, and 17, 17 are tension rollers arranged in the middle.

By the way, as shown in FIGS. 3 (a) and 3 (b), the connection between the lawnmower 11 and the passenger work vehicle 10 is such that the deck lift arms 19, 19 are attached to the brackets 18, 18 attached to the lower left and right sides of the vehicle body 10c. The rear end is swingably attached with bolts 20,
Further, the left and right tensioner arms 21 having the left and right tensioner pulleys 20a, 20b for phase conversion and tensioning of the belt 15 are attached to the brackets 18, 18.
Both a and 21b are installed in common. 22a
Is a spring tensioned on the tensioner arm 21a, 2
Similarly, 2b is a spring stretched around the tensioner arm 21b.

Hereinafter, the operation of the bracket structure for connecting the working machine according to the present invention will be described based on the above configuration.

That is, the working machine connecting bracket structure according to the present invention is such that the rear ends of the deck lifts 19, 19 for suspending the lawn mower 11 are first swingably mounted on the brackets 18, 18 provided at the front end and the rear end of the vehicle body 10c. Along with being pivotally attached by the bolt 20, it can be used commonly for attaching the left and right tensioner arms 21a, 21b to which the left and right tensioner pulleys 20a, 20b for phase conversion and tensioning of the belt 15 are attached. It is possible to reduce the number of points and improve the rigidity of the frame with an extremely simple structure.

[Effect of device]

As described above in detail, the present invention provides a passenger work vehicle capable of performing a predetermined work by connecting a predetermined work machine to a predetermined lift device arranged in front of or behind a vehicle body. The base end of the support frame of the working machine that can be lifted and lowered by the lift device is attached to a pair of brackets attached to the left and right front ends or the left and right ends of the rear end of the passenger work vehicle, and the drive is attached to the PTO of the passenger work vehicle. Since the tension arm equipped with the tension pulley for belt support wound around the pulley and the driven pulley attached to the drive section of the working machine is configured to be attached, it can be mounted on, for example, a front mower lawn mower. Installation of the support frame of the work machine in the passenger work vehicle with a structure equipped with a predetermined work machine in front of the work vehicle, and the drive pulley installed in the PTO. A pair of brackets can also be used to attach a tension arm for bearings such as a tension pulley for a belt that is wound between driven pulleys of the machine, reducing the number of parts, improving assembly workability, and improving the rigidity of the bracket. It is possible to provide a tensioner bracket structure having various excellent effects such as

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a bracket structure for connecting a working machine according to the present invention, and FIG. 2 is a side view of the same embodiment.
FIGS. 3 (a) and 3 (b) are explanatory views showing a main part configuration of the embodiment. 10 …… Passenger work vehicle, 11 …… Law mower, 11a …… Cutter housing, 13a …… Cutter blade, 10a …… Engine, 10b …… Drive pulley, 14 …… Driven pulley, 15 ……
Belts, 16 …… idle rollers, 17 …… tension rollers, 10c …… car body, 18 …… brackets, 19 …… deck lift arm, 20 …… bolts, 20a, 20b …… tensioner pulleys, 21a, 21b …… tensioner arm.

Claims (1)

[Scope of utility model registration request] 1. A passenger work vehicle capable of performing a predetermined work by connecting a predetermined working machine to a predetermined lift device arranged in front of or behind the vehicle body, wherein a front end of the body of the passenger work vehicle. The base end of the support frame of the working machine that can be raised and lowered by the lifting device is attached to a pair of brackets attached to the left and right or the rear end left and right, and the drive pulley attached to the PTO of the passenger work vehicle and the working machine. A bracket structure for connecting a working machine, wherein a tension arm equipped with a tension pulley for supporting a belt wound around a driven pulley attached to a driven portion is attached.