JP2000203790A - Wheel crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify installation of vertical pipes without inviting lowering rigidity/strength of a rear frame by providing a pipe passing hole passing through in the vertical direction at the rear part of a car body frame situated in driving unit storing space. SOLUTION: On a beam member 12a on one side (left side) of a rear frame 12 in a car body frame 11, an exhaust pipe passing hole 15 as a pipe passing hole is provided by passing through in the vertical direction. An exhaust pipe 16 suspends in a vertical pipe part 16a passed through the exhaust pipe passing hole 15 after the pipe 16 is almost horizontally extended from an exhaust port of an engine E to the rear side, is connected with one end side of a muffler 17 toward an engine E side again, is extended upward from multi-end side of this muffler 17 and is connected with an exhaust cylinder 18. This exhaust cylinder 18 is covered with an exhaust cylinder cover 19. In the exhaust pipe passing hole 15, a guide pipe 20 is mounted in a vertical direction passing through state and the vertical pipe part 16a of the exhaust pipe is inserted into this guide pipe 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel crane such as a rough terrain crane having an improved structure for installing piping around an engine.

[0002]

2. Description of the Related Art A body frame of a wheel crane is basically constructed in a box structure including an upper plate, a lower plate, and left and right side plates.

In this case, as shown in FIG. 11, a rear portion (hereinafter, referred to as a rear frame) 51 of the vehicle body frame 50 is bifurcated, and a drive unit housing space S is formed between the left and right hollow beam members 51a and 51b. A configuration is known in which a drive unit U including an engine E and its peripheral devices (a torque converter, a transmission, a hydraulic pump as a hydraulic power source serving as a power source for crane work, etc.) is housed in the space S.

In the drawing, reference numeral 52 denotes a connecting frame provided between the rear ends of both beam members 51a and 51b, and 53 denotes a swivel table on which an upper swing body is mounted.

[0005]

In this configuration, there are the following problems regarding the arrangement of pipes and wiring (hereinafter referred to as pipes) around the engine E.

[0006] In a wheel crane that requires mobility, since the vehicle width is limited to a small value, the installation space for pipes is originally insufficient.

[0007] In particular, pipes (hereinafter, referred to as pipes) passed in the vertical direction
In the case of large-diameter pipes such as exhaust pipes for discharging engine exhaust to the outside, interference with horizontal pipes and equipment, which occupy most of the pipes, tends to occur. The fact is that we are struggling with the layout.

In this case, it is conceivable to use the drive unit housing space S as a piping space. For this purpose, if the width of the beam members 51a and 51b is reduced and the space S is widened, the effective cutting of the rear frame 51 is prevented. The area is reduced and rigidity and strength are reduced. In this case, the lifting ability, which is another requirement of the wheel crane, is reduced.

Further, when the exhaust pipe extending from the muffler is vertically set up, there is a disadvantage that rainwater enters from the exhaust port or the exterior of the crane is contaminated by exhaust gas radiated from the exhaust port. .

[0010] In addition, the longer the exhaust pipe, the higher the pressure loss, which places a burden on the engine. In addition, when a high-temperature exhaust pipe is routed on the undercarriage, it not only becomes an obstacle during maintenance work, but also hinders the downsizing of the wheel crane.

Accordingly, the present invention provides a wheel crane that can easily install vertical piping without reducing the rigidity and strength of the rear frame. Also,
An object of the present invention is to provide a wheel crane capable of solving troubles caused by arrangement of an exhaust pipe and an exhaust port.

[0012]

According to a first aspect of the present invention, there is provided a wheel crane having a drive unit accommodating space for accommodating a drive unit including an engine in a rear portion of a vehicle body frame, facing the drive unit accommodating space. In the rear part of the vehicle body frame, there is provided a through hole for piping that penetrates in a vertical direction.

According to a second aspect of the present invention, in the configuration of the first aspect, a guide pipe is provided in a vertical direction in the pipe through hole.

According to a third aspect of the present invention, in the configuration of the first or second aspect, an exhaust pipe for discharging engine exhaust to the outside is inserted into a pipe through hole.

According to a fourth aspect of the present invention, there is provided a wheel crane in which a drive unit housing space for housing a drive unit including an engine is formed at a rear portion of a vehicle body frame.
The gist is that an exhaust port of an exhaust pipe for discharging engine exhaust to the outside is disposed below the vehicle body frame.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the engine exhaust discharged from the exhaust port is discharged outside the vertical cylinder of the outrigger.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect, the engine exhaust discharged from the exhaust port flows backward along the lower surface of the outrigger box and is discharged to the outside so that the engine exhaust is discharged to the outside. An exhaust guide means is formed.

According to a seventh aspect of the present invention, in the configuration of any one of the fourth to sixth aspects, the exhaust port is flat and arranged in a horizontally long state.

According to an eighth aspect of the present invention, in the configuration of the fourth to seventh aspects, the exhaust pipe muffler is disposed below the engine.

According to a ninth aspect of the present invention, in the configuration of the fourth to seventh aspects, the exhaust pipe muffler is disposed above the lower traveling body.

According to the first aspect of the present invention, the vertical pipes among the pipes around the engine can be passed through the pipe through holes in the rear part (rear frame) of the body frame, neither inside nor outside the drive unit housing space. Therefore, it is not necessary to expand the space to secure the space for installing vertical piping.

That is, the vertical piping can be easily installed without lowering the rigidity and strength of the rear frame, and particularly, the vertical piping portion of the large-diameter exhaust pipe which is liable to interfere with other piping and the like. Piping becomes easy.

Further, according to the structure of the second aspect in which the guide pipes are provided in the pipe through holes, the pipe work is easy because the vertical pipes are easily passed through the holes, and the heat insulation effect by the guide pipes and the surrounding area of the holes are improved. A reinforcing effect can be obtained.

According to the structure of the fourth aspect, in which the exhaust port is disposed below the vehicle body frame, it is possible to prevent rainwater from entering the muffler, and to prevent contamination of the crane exterior due to engine exhaust.

According to the structure of the fifth aspect, the exhaust port is disposed so that the engine exhaust is discharged while avoiding the vertical cylinder of the outrigger, even if the engine exhaust is discharged below the vehicle body frame. Is not contaminated.

According to the structure of the eighth aspect, wherein the exhaust port is disposed below the vehicle body frame and the muffler is disposed below the engine, it is possible to prevent rainwater from entering the muffler, and to prevent contamination of the crane exterior due to engine exhaust. In addition, the pressure loss is reduced by shortening the length of the exhaust pipe, and the load on the engine is reduced.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

(1) First Embodiment FIG. 1 shows the overall configuration of a wheel crane according to the present invention. An upper revolving unit 2 is mounted on a lower traveling unit 1 so as to be pivotable. A cabin 3 is arranged in front of the upper swing body 2, and a telescopic boom 4 is arranged behind it.

Outriggers 5 and 6 are provided at the front and rear portions of the lower traveling body 1, and vertical cylinders 5a and 6a are extended to the left and right sides of the lower traveling body 1, and the vertical cylinders 5a and 6a are provided.
The rod is extended from a and 6a, and the floats 5b and 6b at the lower end of the rod are grounded. A drive unit to be described later is accommodated in the rear cover 7 of the lower traveling body 1.

In FIG. 2, reference numeral 11 denotes a body frame which constitutes the lower traveling body 1. Similar to the body frame 50 of the conventional crane shown in FIG. 11, a rear frame 12 of the body frame 11 is formed in a forked shape. A drive unit housing space S is formed between the left and right hollow beam members 12a and 12b, and a drive unit U including peripheral devices such as an engine E and a hydraulic pump is housed in the space S. Reference numeral 13 denotes a connecting frame suspended between the left and right beam members 12a and 12b.
Reference numeral 4 denotes a swivel.

In one (left side) beam member 12a of the rear frame 12 of the vehicle body frame 11, an exhaust pipe through hole 15 as a pipe through hole is provided so as to penetrate vertically, and is shown in FIGS. Thus, the exhaust pipe 16 of the engine E
Is configured to be passed through the exhaust pipe passage hole 15.

Since the beam member 12a is hollow,
As shown in FIG. 5, the exhaust pipe through hole 15 is formed only by drilling work on the upper plate 12a1 and the lower plate 12a2 of the beam member 12a.

The exhaust pipe 16 extends almost horizontally rearward from the exhaust port of the engine E as shown in FIGS.
Hanging down at a vertical pipe portion 16a passed through the exhaust pipe through hole 15,
It is again connected to one end of the muffler 17 toward the engine E, and extends upward from the other end of the muffler 17 to be connected to the exhaust pipe 18. Reference numeral 19 denotes an exhaust pipe cover that covers the exhaust pipe 18.

On the other hand, a guide pipe 20 is attached to the exhaust pipe through hole 15 in a vertically penetrating state (see FIG. 5), and an exhaust pipe vertical pipe portion 16a is inserted through the guide pipe 20.

As the guide pipe 20, a metal pipe is usually used, but a pipe formed of a heat insulating material or a pipe having a heat insulating material attached to the inner or outer surface of the metal pipe may be used.

As described above, in order to pass the exhaust pipe vertical pipe portion 16a through one of the beam members 12a, the width of the drive unit accommodating space S is increased in order to secure an installation space for the vertical pipe portion 16a (beam members 12a, 12b). It is not necessary to reduce the width of 12b).

Further, the provision of the guide pipe 20 makes it easier for the vertical pipe portion 16a to pass through the exhaust pipe passage hole 15.

(B) Since the direct heat conduction from the vertical pipe portion 16a to the beam member 12a is prevented, it is possible to avoid a thermal influence on other piping and equipment.

(C) By using a high-strength material such as a metal tube, the periphery of the hole 15 can be reinforced.

(2) Second Embodiment In the first embodiment, one exhaust pipe passage hole 15 is provided in the left beam member 12a of the rear frame 12, but depending on the number and arrangement of the vertical pipe portions 16a. Insert the hole 15 into the left beam member 1
Two or more may be provided in 2a, and may be provided in right side beam member 12b or both side beam members 12a and 12b.

Further, wiring or other piping may be passed through the exhaust pipe passage hole 15 together with the vertical exhaust pipe section 16a. Alternatively, the hole 15 may be used as a vertical pipe other than the exhaust pipe or a through hole for vertical wiring.

Although it is desirable to provide the guide pipe 20 in the exhaust pipe passage hole 15 as in the above-described embodiment, the present invention is also applicable to a configuration in which the pipes are directly passed through the hole 15 without providing the pipe 20. The objective of can be achieved.

(3) Third Embodiment FIGS. 6A and 6B show a configuration of a third embodiment, wherein FIG. 6A is a plan view and FIG. 6B is a front view. The same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 6, reference numeral 30 denotes an outrigger box disposed on the left side of the rear frame 12, and reference numeral 31 denotes an outrigger box also disposed on the right side. These outrigger boxes 30 and 31 are connected to the rear frame 12
, And each beam 6c (see FIG. 1) stored in the outrigger boxes 30 and 31 is extended in a substantially horizontal direction. That is, the outrigger in the present embodiment forms a so-called H-shaped outrigger.

The exhaust pipe 16 extending from the exhaust outlet E1 of the engine E is guided to the lower part of the vehicle body frame via a vertical pipe portion 16a penetrating through the exhaust pipe through hole 15 of the beam member 12a (see FIG. 7). It is bent 90 degrees along the lower surface 12a (see FIG. 6B), and is connected to a muffler 17 arranged below the engine E through a horizontal tube portion 16b.

In FIG. 7, the muffler 17 is arranged below the engine E so as to secure a predetermined ground clearance h, and a pair of brackets 32 is provided from a plate 31 provided on the left and right beam members 12a and 12b. , 32 are suspended, and the belts 33, 33 wound around the muffler 17 are connected to the brackets 32, 32, thereby being fixed to the vehicle body frame.

A tail pipe 35 is connected to the exhaust outlet of the muffler 17 via a flange 34, and an exhaust portion 36 is provided at the tip of the tail pipe 35.

FIG. 8 shows the structure of the exhaust part 36 in an enlarged manner. The exhaust portion 36 is welded to the tip of the tail pipe 35 bent rearward toward the rear,
An exhaust port 36b having a flat exhaust port 36a, and a tail pipe 35 having a different cross-sectional shape from the exhaust port 36b,
And a connection pipe 36c that is connected in a substantially triangular shape when viewed from above.

The exhaust port portion 36b is disposed close to the lower surface of the outrigger box 31, and the engine exhaust EG discharged from the exhaust port 36a flows backward along the lower surface 31a of the outrigger box 31, and then the vehicle body frame. It is released to the outside. 31b, 31b are a pair of guide plates (exhaust guide means) provided along the flow of the engine exhaust eg.

As shown in FIG. 9, the guide plates 31b project downward from the lower surface of the outrigger box 31, and are arranged in parallel along the longitudinal direction of the body frame 11. And this guide plate 31b, 31b
Exhaust gas e by the outer trigger box lower surface 31a
The flow of g is guided in a specific direction.

Accordingly, the engine exhaust eg from the exhaust port portion 36b is discharged to the outside while avoiding the vertical cylinder 6a of the outrigger, so that the cylinder sliding portion of the vertical cylinder 6a is not particularly contaminated.

(4) Fourth Embodiment In the third embodiment, the muffler 17 and the exhaust unit 36
Are arranged below the engine E, but the muffler 17 can be arranged above the lower traveling body as long as at least the exhaust portion 36 is arranged below the body frame. For example, when the muffler is arranged in the rear cover, a tail pipe connected to the exhaust outlet of the muffler 17 forms a vertical pipe portion, penetrates through the exhaust pipe through hole 15 of the beam member 12a, and extends below the body frame 11. And is connected to the exhaust unit 36.

(5) Fifth Embodiment In the fifth embodiment shown in FIG. 10, when exhaust gas eg is discharged to the outside while avoiding the vertical cylinder 6a of the outrigger, the tip of the tail pipe 40 is connected to the outrigger box 31. And extends in the width direction of the vehicle body frame to substantially the same position as the end surface 31c, and the tip end portion 41 is disposed obliquely rearward and outward.

According to this configuration, the outrigger box 3
The engine exhaust eg can be discharged to the outside without allowing the exhaust gas to pass through the lower surface of the first cylinder 1 and without contaminating the vertical cylinder 6a.

[0055]

As described above, according to the present invention, since the pipe through holes are provided vertically through the rear portion of the vehicle body frame, the vertical pipes among the pipes around the engine can be used.
Neither inside nor outside of the drive unit housing space, it can be passed through the piping holes.

Therefore, since there is no need to expand the space,
Vertical piping can be easily installed without lowering the rigidity and strength of the rear frame.Especially, the vertical piping of large-diameter exhaust pipes that easily interfere with other piping etc. can be easily installed. Become.

According to the second aspect of the present invention, in which the guide pipe is provided in the pipe through hole, the vertical pipes are easily passed through the hole, so that the pipe work is facilitated, the heat insulating effect by the guide pipe, and the surrounding area of the hole are improved. A reinforcing effect can be obtained.

According to the fourth aspect of the present invention, in which the exhaust port of the exhaust pipe is arranged below the vehicle body frame, it is possible to prevent rainwater from entering the muffler, and to prevent contamination of the crane exterior due to engine exhaust.

According to the structure of the fifth aspect in which the exhaust pipe is provided so as to avoid the vertical cylinder of the outrigger, the vertical cylinder of the outrigger is not contaminated even when the engine exhaust is discharged from below the body frame.

According to the eighth aspect of the present invention, in which the exhaust port is disposed below the vehicle body frame and the muffler is disposed below the engine, it is possible to prevent rainwater from entering the muffler, thereby preventing contamination of the crane exterior by engine exhaust. In addition, the pressure loss is reduced by shortening the length of the exhaust pipe, and the load on the engine is reduced. Further, the size of the wheel crane can be reduced. Furthermore, since a cover for preventing contact is not required, the cost of the exhaust system can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a wheel crane according to the present invention.

FIG. 2 is a schematic plan view showing a vehicle body frame of the wheel crane according to the embodiment of the present invention.

FIG. 3 is an enlarged plan view showing a piping state of an exhaust pipe at a rear portion of the frame.

FIG. 4 is a perspective view of the same.

FIG. 5 is an enlarged sectional view taken along line IV-IV of FIG. 2;

FIG. 6A is a plan view showing another embodiment of the present invention,
(B) is a front view thereof.

FIG. 7 is a left side view of FIG. 6 (b).

FIG. 8A is a plan view showing a configuration of an exhaust unit in FIG. 7;
(B) is a left side view of the same figure (a), (c) is a front view.

FIG. 9 is a perspective view showing the configuration of the guide plate of FIG.

FIG. 10 is a plan view showing still another embodiment of the present invention.

FIG. 11 is a diagram corresponding to FIG. 2 for explaining a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Body frame 12 Body frame rear part 12a, 12b Left and right beam members 15 Exhaust pipe through-hole (piping through hole) 16 Exhaust pipe 16a Exhaust pipe vertical pipe part 20 Guide pipe E Engine S Drive unit accommodation space

Claims (9)

[Claims] In a wheel crane having a drive unit housing space in which a drive unit including an engine is housed in a rear portion of a body frame, a pipe vertically penetrating a rear portion of the body frame facing the drive unit housing space. A wheel crane having a through hole. 2. The wheel crane according to claim 1, wherein a guide pipe is provided vertically in the pipe through hole. 3. The wheel crane according to claim 1, wherein an exhaust pipe for discharging engine exhaust to the outside is inserted into a pipe through hole. 4. In a wheel crane having a drive unit housing space in which a drive unit including an engine is housed in a rear portion of a body frame, an exhaust port of an exhaust pipe for discharging engine exhaust to the outside is provided below the body frame. Wheel crane characterized by being arranged in. 5. The wheel crane according to claim 4, wherein the engine exhaust discharged from the exhaust port is discharged outside the vertical cylinder of the outrigger. 6. An exhaust guide means is formed on the lower surface of the outrigger box so that engine exhaust discharged from the exhaust port flows backward along the lower surface of the outrigger box and is discharged to the outside. Wheel crane. 7. The wheel crane according to claim 4, wherein the exhaust port is flat and arranged in a horizontally long state. 8. The wheel crane according to claim 4, wherein a muffler of the exhaust pipe is disposed below the engine. 9. The wheel crane according to claim 4, wherein a muffler of the exhaust pipe is disposed above the lower traveling body.