JP2000085615A - Structure of safety frame support portion for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily dispose a lamp to a safety frame by interconnecting right and left wirings below a joint frame. SOLUTION: A joint frame is disposed between lower arms 32 arranged in the right and left side portions of a tractor, and fixed to a stay 100 of a safety frame base portion 31a fixed to the lower arms 32. Connecting portions 33a are constituted at the both ends of the joint frame, and the joint frame is connected to the stay 100 of the safety frame base portion 31a at the connecting portions 33a. The connecting portions 33a are constituted in the L-shape in front view, and are fixed to the stay 100 in the plane direction and side direction. The connecting portions 33a are constituted in the T-shape in plane view, are fixed to the upper surface of the stay 100 of the safety frame base portion 31a through vertically hinged bolts, and are fixed to the side surface direction of the stay 100 through bolts hinged in the right and left direction of a car body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting exterior parts on a safety frame (lops) support of a tractor.

[0002]

2. Description of the Related Art Conventionally, in a tractor without a cabin, a safety frame is provided to protect an operator of a driving unit. In the safety frame, an inverted U-shaped frame is erected on a rear end of a driver's seat on both sides of a ender, and the ender is integrally formed with a reinforcing frame to improve strength, The reinforcing frame is fixed on the rear axle case. In addition, when the direction indicator attached to the tractor is arranged on a fender or when a cabin is mounted, the direction indicator is mounted on a cabin frame that stands upright on the front side of a steering wheel. For example, this is the technique of Japanese Utility Model No. 2565114. In addition, a configuration in which a work light is disposed before and after an upper portion of a canopy is also known. For example, the technique of Japanese Utility Model Publication No. 6-7585.
In addition, when a work machine is not mounted on a work machine mounting device provided at the rear of a tractor, the top link is fixed to the machine while the top link is still mounted. That is, the main body side of the top link is pivotally supported in a rotatable manner, and the holder is attached to a protective cover of the PTO shaft or a mudproof cover at the rear of the main body, and the top link is locked to the holder. Then, the top link does not come into contact with the machine due to vibration or shaking during traveling to prevent damage. For example, the technology disclosed in Japanese Utility Model Laid-Open No. 55-104005 and Japanese Utility Model Laid-Open No. 57-59155.

[0003]

However, in the above-described conventional configuration, the harnesses of the turn signal lights and the working lights are exposed or covered with extra parts. They could be hooked, had poor appearance, and had low durability. Further, when the harness is covered and protected by a special part, it is necessary to provide a member for protecting the harness, the number of parts increases, the assemblability decreases, and it is necessary to remove the harness every time repair or maintenance is performed. However, there is a problem that the working time becomes longer. Furthermore, it is necessary to have a sufficient strength to protect the harness on the safety frame, and the manufacturing cost has been increased.

[0004]

The problem in the prior art is as described above, and the present invention solves the problem by the following means. 2. The safety frame according to claim 1, wherein the lower portion of the safety frame is fixed to upper surfaces of left and right huenders, and joint frames are provided on both sides of the lower portion of the safety frame. And a reinforcing hole, and a wiring hole and a lamp mounting hole are provided on the outer surface of the upper and lower middle part of the safety frame, and an extraction hole is provided on the lower inner surface, and the wiring of the lamp is provided with the wiring hole and the extraction hole. Then, the right and left wires are connected below the joint frame.

According to a second aspect of the present invention, a top link fixing device is provided on a rear surface of the joint frame, and the top link fixing device includes a hook portion, a support shaft portion, and a mounting stay, and supports the hook portion. In addition to being rotatably supported around the shaft, the hook is projected obliquely rearward and downward so that the top link can be fitted.

According to a third aspect of the present invention, an opening is provided on a side surface of the hender, and a selective control valve disposed on a side surface of the hydraulic case is detachable from the opening, and a cover capable of detaching the opening. With

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is an overall side view of a tractor according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional side view showing a configuration of an operation unit, FIG. 3 is a front view, FIG. 4 is a plan view, and FIG. FIG. 6 is a perspective view showing a safety frame base, FIG. 7 is a side view showing a tractor with a cabin attached thereto, FIG. 8 is a right side view showing a configuration of an operation unit, and FIG. 9 is a configuration of a selective control valve. 10, a rear view, FIG. 11 is a plan view, FIG. 12 is a side view showing a configuration of a selective control valve and a fender, FIG. 13 is a partial cross-sectional side view showing a configuration of a top link fixing device, FIG. 14 is a partial cross-sectional plan view of FIG.
5 is a rear view, FIG. 16 is a plan view showing the shape of the hook portion, FIG. 17 is a side view showing the arrangement of the lamp, FIG. 18 is a front sectional view of the same, and FIG. It is sectional drawing.

First, the overall configuration of a tractor according to the present invention will be described with reference to FIG. A front wheel 2 and a rear wheel 3 are suspended back and forth, and a bonnet 4 is provided at the front of the machine, and an engine 5 is mounted inside the hood 4. An operating unit 18 is provided behind the hood 4, and the operating unit 18 is provided with the steering handle 6, the seat 7, and the safety frame 31. A seat 7 is provided behind the steering handle 6 provided behind the hood 4, and an inverted U-shaped safety frame 31 is provided on the rear side and above the seat 7. Therefore, workers can be protected in the event of a fall.

A clutch housing 13 is connected to the rear of the engine 5, and a transmission case 14 is connected to the rear of the clutch housing 13.
To be driven. The front and upper sides of the rear wheel 3 are mounted on the fender 63. The driving force of the engine 5 is also transmitted to a power take-off shaft (hereinafter, PTO shaft) 15 protruding from the rear end of the transmission case 14, so that the work machine mounted on the rear of the machine body can be driven. The front wheel 2 is mounted on a front axle 26.

Next, the configuration of the operation unit 18 will be described with reference to FIGS. The driving section 18 is provided with the seat 7 and a safety frame 31. A hydraulic case 51 is disposed below the seat 7. A hydraulic cylinder is provided above the hydraulic case 51, and is mounted on a rear portion of the tractor via a working machine mounting device such as a lift arm or a lift link. The configured working machine is configured to be able to move up and down. The safety frame 31 disposed behind the seat 7 is formed in an inverted U-shape when viewed from the front, and is configured to be able to protect the driver from the upper rear portion and side portions of the seat 7. The safety frame 3
Numeral 1 is formed of a hollow square or round pipe, which maintains strength and realizes weight reduction. Further, the lower portion of the safety frame 31 is fixedly mounted on the safety frame base 31a.

As shown in FIG. 6, the safety frame base 31a is provided with a stay 100 on the bottom surface of the safety frame base 31a.
The stay 100 fixed to the bottom of the safety frame base 31a is provided with a hole into which a bolt can be inserted.

The safety frame base 31a is provided with a stay 10
0, it is disposed on a lower frame (reinforcement frame) 32 disposed on the left and right sides of the tractor via a fender 63, and is fixed to the upper surface of the lower frame 32 by bolts. Further, a joint frame 33 is connected to the safety frame base 31a.

Further, as shown in FIG. 7, when the cabin specification is used, another member 131 is mounted on the safety frame,
The cabin 110 can be mounted thereon. This facilitates installation of the cabin 110.

The joint frame 33 is disposed between lower frames 32, 32 disposed on the left and right sides of the tractor, and is fixed to a stay 100 of the safety frame base 31a fixed to the lower frame 32. ing. Connection portions 33a are formed at both ends of the joint frame 33, and the safety frame base 31 is connected to the connection portions 33a.
a of the stay 100. The connecting portion 33a is formed in an L shape when viewed from the front, and is fixed to the stay 100 in a plane direction and a side direction. Also,
The connecting portion 33a is formed in a T-shape in plan view, and is fixed to an upper surface of the stay 100 of the safety frame base 31a by a bolt screwed up and down.
0 is fixed in the side direction by bolts screwed in the lateral direction of the machine body. With this configuration, the joint frame 33 can withstand forces in the up-down direction, the left-right direction, and the front-back direction. Further, the rigidity of the safety frame 31 is enhanced by the joint frame 33.

In the above configuration, as shown in FIG. 7, when the joint frame 33 is connected to the safety frame base 31a of the safety frame 31,
1 and the tractor can be provided with the cabin 110. In this configuration, the safety frame base 31
Since the joint frame 33 is connected to “a”, the strength of the body can be maintained by the joint frame 33. For this reason, by attaching the separate member 131 and attaching the cabin 110, a tractor of a cabin specification can be configured, so that most of the components other than the cabin and the safety frame 31 can be shared in the tractor. Also, the manufacturing cost can be reduced.

A hydraulic case 51 is provided below the operating section 18. A lift arm 53 extends rearward from both sides of the hydraulic case 51, and a base of the arm 53 is configured to be rotatable about the machine body left-right direction as a rotation axis by hydraulic pressure. Can be done. One end of a top link 52 is rotatably supported on the rear surface of the hydraulic case 51 or the rear surface of the transmission case. The work implement mounting device is supported by lower links that are supported on both sides of the top link 52 and the transmission case. Make up.

On the right side of the hydraulic case 51,
As shown in FIG. 8, a selective control valve (hereinafter referred to as SCV) 61 for performing hydraulic control for a working machine to be retrofitted is configured to be mountable. The SVC 61 has a link mechanism 6
2a, it is connected to an SCV operation lever 62 disposed in front of the seat 7, and the SCV operation lever 62
The spool of the CV 61 is configured to be operable. The working machine is, for example, a front loader, a snow lower, a blade, or the like mounted on the front part of the machine body.

Next, the mounting configuration of the SCV 61 will be described with reference to FIGS. The SCV 61 is composed of a hydraulic valve that can be hydraulically controlled, and has a seat 7.
Are disposed on the side surface of the hydraulic case 51 disposed below the inside of the fender 63. An opening 63a is provided at a side position of the fender 63 where the SCV 61 is attached.
The opening 63a is always closed by a cover 63b.

Therefore, the SCV 61 can be mounted by removing the rear wheel and removing the cover 63b. Therefore, there is no need to remove the fender 63, and it is not necessary to remove the safety frame 31 attached to the fender 63, and the SCV 61 is easily removed.
Can be attached. For this reason, SCV61
The workability of the mounting is improved, and the work time is shortened. Especially in a small tractor, the SCV61 is connected to the hydraulic case 5
1, the seat position can be lowered, and the operation is facilitated by positioning the operation lever to the right front of the seat.

The SCV 61 is configured to be detachable from the side surface of the hydraulic case 51, and the SCV 61 is configured to be removable from an opening 63 provided in the fender 63, and the opening 63 is covered by a cover 63b. It can be retrofitted to the tractor as needed. Therefore, the SC
There is no need to change the configuration of the tractor for mounting the SCV 61, such as increasing the position of the seat 7 for mounting the V61 or increasing the tread. Further, since the number of changed parts is smaller than that of the conventional tractor, it is possible to increase the number of common members of the tractor and reduce the number of parts.

As shown in FIG. 9, the SCV 61 is provided with a rear oil pressure take-out portion, and the rear oil pressure take-out hoses 71 and 72 can be connected to the rear oil pressure take-out portion. The rear hydraulic outlet hoses 71 and 72
Are the rear hydraulic take-out couplers 71b and 72b, respectively.
And the rear hydraulic pressure take-out coupler 71b
A hydraulic intake hose is connected to a working machine connected to the rear of the machine (not shown) at 72b so that power can be transmitted to the working machine. The hydraulic hoses 71 and 72 are disposed inside the fuselage from the fender 63,
2 is protected. The rear hydraulic pressure take-out couplers 71b and 72b are disposed on a bracket 73, and the bracket 73 is fixedly mounted on the lower frame 32 together with the joint frame 33 described above. That is, the mounting bracket 73 for the coupler for taking out the rear hydraulic pressure is provided between the left and right lower frames.
And the structure to be tightened together.

The bracket 73 includes an inverted L-shaped mounting portion 73a in a front view and a rectangular plate-like coupler disposing portion 73b. The coupler mounting portion 73b is configured to have a height that can be inserted into a space between the upper portion and the lower portion of the safety frame base portion 31a, and is provided inside the safety frame base portion 31a. Also, the mounting portion 73a of the bracket 73
Is fixed to the lower frame 32 together with the connecting portion 33a of the joint frame 33 and the stay 100. The mounting portion 73a is vertically connected to the lower frame 32 together with the connecting portion 33a of the joint frame 33 and the stay 100.
And the joint frame 33 in the left-right direction.
Are fixed to the connecting portion 33a and the stay 100.

Therefore, the bolt 73a for fixing the bracket 73 is protected by the safety frame base 31a, and the bracket 73 is secured to the safety frame base 3
Since the safety frame base 31a is disposed inside the fuselage from the body 1a, the safety frame base 31a protects the vehicle from obstacles from outside. The rear hydraulic pressure take-out couplers 71b and 72b provided on the bracket 73 are vertically arranged on the bracket 73. For this reason, the couplers 71b and 72b for taking out the rear hydraulic pressure are fixedly provided by the same component, so that the number of components is reduced, assembling and maintenance are improved, and the manufacturing cost is reduced.

The bracket 73 is fixedly mounted on the lower frame 33 together with the joint frame 33 disposed behind the seat 7, and a part of the bracket 73 is inserted inside the safety frame base 31a. Further, since the rear hydraulic pressure take-out couplers 71b and 72b are arranged vertically, the width of the bracket 73 can be reduced while maintaining the rigidity of the bracket 73, and the amount of protrusion of the bracket 73 to the inside is reduced. Decrease. Therefore, sheet 7
The space in the vicinity can be used effectively, and the comfort of the driver is not impaired.

Next, the structure of the fixing device 81 of the top link 52 when no work is mounted on the work implement mounting device will be described with reference to FIGS. The fixing device 81
Is disposed on the rear surface of the joint frame 33 and substantially at the left and right central portions of the joint frame 33. The fixing device 81 includes a hook portion 81a and a support shaft portion 81c.
And the mounting stay 81b. The mounting stay 81b is bolted to the joint frame 33.
It is fixed on the rear side. The left and right central portions of the mounting stay 81b are bent so as to project rearward, and are formed in an Ω shape so that the support shaft portion 81c of the hook portion 81a can be fitted.

The support shaft 81c above the hook 81a
Is formed as a straight rod, and the mounting stay 81
13b, the hook portion 81a is protruded obliquely rearward and downward from the lower portion of the support shaft portion 81c as shown in FIG. 13, and as shown in FIG.
a to rotate the hook portion 81a into the joint frame 3
3 can be stored below. As a result, the amount of protrusion of the hook portion 81a backward from the joint frame 33 is reduced, so that interference between the hook portion 81a and the top link 52 does not occur. The upper end of the hook portion 81a is bent at substantially 90 °, so that the hook portion 81a does not fall off the mounting stay 81b. The lower portion of the hook portion 81a is formed in a substantially C-shape as shown in FIG. 16, and the inner shape thereof is substantially equal to the outer peripheral shape of the top link 52.
The lower end of the hook portion 81a has a shape that is bent inward and then expanded outward so that the top link 52 is easily inserted and hardly detached. Thus, at the position where the hook portion 81a protrudes rearward, the fixing device 81 can be easily held simply by lifting the top link 52 and turning it sideways. When removing, it is only necessary to turn to the opposite side.

Next, a mounting structure of a lamp 91 serving as a direction indicator disposed on both sides of the safety frame 31 will be described with reference to FIG.
This will be described with reference to FIGS. As shown in FIG.
The lamp 91 is provided outside the safety frame 31. Lamp mounting holes 92, 92 and a wiring hole 93 are opened in the middle of the outer surface of the safety frame 31 in the vertical direction, and an extraction hole 96 is opened in a lower part of the inner surface of the safety frame base 31a. A connector 91a fixed to the lamp 91 is inserted into the mounting holes 92, and the lamp 91 is fixed to the safety frame 31.

In this embodiment, the lamp mounting hole 92
A bush made of an elastic body is mounted around each of the 92, the wiring hole 93, and the extraction hole 96 to prevent rattling or infiltration of water or the like. And a connector 91a inserted into the lamp mounting holes 92.
The tip has a larger diameter than the root, and the tip is inserted into the lamp mounting hole 92 by elastically deforming a bush, and the connecting tool 91a is mounted in the lamp mounting hole 92 by the bush. It has become. However, the lamp 9
The configuration for mounting the safety frame 1 on the safety frame 31 is not limited to the above, and a screw, a bolt rivet, or the like may be used, as long as the lamp 91 can be mounted on a hole provided in the safety frame 31.

The wiring 91b of the lamp 91 extends from the wiring hole 93 to the inside of the safety frame 31, and the wiring 91b is covered with a protective tube.
1b is protected. In this embodiment, the wiring 91b is inserted and covered in a corrugated tube 95 as a protective tube, and the wiring 91b is protected by the corrugated tube 95. The corrugated tube 95 is, as shown in FIG.
The joint frame 3 extends out of the safety frame 31 through an extraction hole 96 provided in a lower portion of the safety frame base 31a, and extends along the joint frame 33.
3 and the left and right corrugated tubes 95 and the wiring 91b
And extend it to the operation panel side at the front of the aircraft,
The lamp 91 is configured to emit light or blink by operation of a switch.

In the above configuration, since the wiring 91b and the corrugated tube 95 are disposed inside the safety frame 31, they are protected by the safety frame 31. Accordingly, the number of members for holding the wiring 91b can be reduced, and since the wiring 91b cannot be seen from the outside, the appearance of the tractor can be improved, and the protrusions around the safety frame 31 can be reduced. Cleanability is improved. In addition, since the wiring 91b is housed in the corrugated tube 95, it is possible to prevent the electric wire from being exposed and short-circuited due to hooking or friction with other parts.

[0031]

As described above, the present invention has the following advantages. 2. The safety frame according to claim 1, wherein the lower portion of the safety frame is fixed to upper surfaces of left and right huenders, and joint frames are provided on both sides of the lower portion of the safety frame. And a reinforcing hole, and a wiring hole and a lamp mounting hole are provided on the outer surface of the upper and lower middle part of the safety frame, and an extraction hole is provided on the lower inner surface, and the wiring of the lamp is provided with the wiring hole and the extraction hole. Since the left and right wires are connected below the joint frame by passing the lamp, the lamp can be easily arranged on the safety frame, and the wiring of the lamp can be protected by the safety frame. In addition, since no wiring is provided on the outer surface of the safety frame, the appearance of the tractor is improved, and the cleaning property of the safety frame is improved. Also, components for binding the wiring to the safety frame can be omitted. In addition, the wiring below the joint frame is protected under the joint frame without hindering the appearance and hindering the appearance.

[0032] As described in claim 2, a top link fixing device is provided on a rear surface of the joint frame, and the top link fixing device is constituted by a hook portion, a support shaft portion, and a mounting stay, and supports the hook portion. The top link fixing device can be configured with a simple configuration because the top link is rotatably supported about the shaft portion, the hook portion protrudes obliquely rearward and downward, and the top link can be fitted. In addition, since the hook portion of the fixing device is configured to be rotatable about a vertical rotation axis, the hook portion does not fall down due to gravity, and the trouble of raising the hook portion when fixing the top link is eliminated. It can be omitted and can be easily fitted and held.

According to a third aspect of the present invention, an opening is provided in a side surface of the huender, and a selective control valve arranged on a side surface of the hydraulic case is detachable from the opening, and the cover is detachable from the opening. As a result, the selective control valve can be retrofitted without removing the joint frame fixed to the fender, thereby improving workability. In a configuration where there is no space below the seat of the operating unit such as a small machine, the selective control valve can be disposed on the side of the hydraulic elevating mechanism to lower the position of the seat, and the operation lever can be moved to the right side of the seat. The operation is facilitated by being located at the front.

[Brief description of the drawings]

FIG. 1 is an overall side view of a tractor according to an embodiment of the present invention.

FIG. 2 is a partial side sectional view showing a configuration of an operation unit.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of the same.

FIG. 5 is a perspective view of the same.

FIG. 6 is a perspective view showing a safety frame base.

FIG. 7 is a side view showing a tractor to which a cabin is attached.

FIG. 8 is a right side view showing the configuration of the driving unit.

FIG. 9 is a side view showing a configuration of a selective control valve.

FIG. 10 is a rear view of the same.

FIG. 11 is a plan view of the same.

FIG. 12 is a side view showing a configuration of a selective control valve and a fender.

FIG. 13 is a partial side sectional view showing the configuration of the top link fixing device.

FIG. 14 is a partial plan sectional view of the same.

FIG. 15 is a rear view of the same.

FIG. 16 is a plan view showing the shape of a hook portion.

FIG. 17 is a side view showing the arrangement of lamps.

FIG. 18 is a front sectional view of the same.

FIG. 19 is a partial front sectional view showing a wiring configuration of a lamp.

[Explanation of symbols]

 31 Safety Frame 31a Safety Frame Base 33 Joint Frame 61 Selective Control Valve (SCV) 71b / 72b Coupler 73 Bracket 91 Lamp 92 Lamp Mounting Hole 93 Wiring Hole

Claims (3)

[Claims] An inverted U-shaped safety frame for protecting a driving portion of a tractor, wherein a lower portion of the safety frame is fixed to upper surfaces of left and right fenders, and joint frames are laterally mounted on both sides of a lower portion of the safety frame. And reinforce,
A wiring hole and a lamp mounting hole are provided on the outer surface of the upper and lower middle part of the safety frame, and an extraction hole is provided on a lower inner surface,
A structure of a safety frame support for a tractor, wherein lamp wiring is passed through a wiring hole and a take-out hole, and left and right wirings are connected below the joint frame. 2. A top link fixing device is provided on a rear surface of the joint frame, the top link fixing device includes a hook, a support shaft, and a mounting stay, and the hook is turned around the support shaft. The structure of a safety frame support for a tractor according to claim 1, wherein the tractor is supported movably, the hook is projected obliquely rearward and downward, and the top link is fittable. 3. An opening is provided on a side surface of the fender, and a selective control valve disposed on a side surface of the hydraulic case is detachable from the opening, and the opening is covered by a detachable cover. The structure of a safety frame support of a tractor according to claim 1, wherein: