JP2002250051A - Air conditioner mounting structure of rops operator's cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner installing structure of construction equipment that has an operator's cab having good appearance, is easily inspected and repaired, and has high assembling workability. SOLUTION: The back wall 26 in the lower part of the back surface of the operator's cab 8 for blocking the backside of a recessed box-like bottom wall 25 is pulled to the front side of a car body to provide the ROPS operator's cab for a bulldozer having a step space in the lower part of the back surface of the operator's cab 8. A mounting pedestal for an air conditioner body is overhung backward from the back wall 26 to the step space and the air conditioner body is placed on it, a capacitor body mounting pedestal is laterally overhung from a back column of a ROPS frame in the back direction of one side tank and the capacitor body is placed on it, and the air conditioner body 29 and the capacitor body 28 are arranged laterally in parallel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a construction machine ROP.
The present invention relates to an air conditioner mounting structure in an S cab.

[0002]

2. Description of the Related Art An air conditioner provided in an operator's cab of a construction machine is often installed in a ceiling portion, a rear portion of a seat, or the like of the operator's cab because there is not enough space in the cab. For example, JP-A-51-32032 discloses that an air conditioner is called a so-called R
There is disclosed an air conditioner installation device that can be installed on the ceiling of a driver's cab protected by an OPS (driver protection structure when the vehicle body falls) and can be pulled down to a position accessible to an inspector during maintenance and inspection. Japanese Utility Model Laid-Open Publication No. 6-49552 discloses a technique in which an air conditioner is mounted on a bracket provided to project outward from a lower portion of a rear wall of a cab, and maintenance and inspection can be easily performed from outside the cab. It has been disclosed. Japanese Utility Model Laid-Open Publication No. 2-51120 discloses a technique in which an air conditioner is mounted on a floor plate at a lower rear portion of a cab, and maintenance and inspection can be easily performed from outside the cab.

[0003]

However, the above-mentioned prior art has the following problems. JP 5
In the technology disclosed in JP-A 1-32032, RO
Since the air conditioner is mounted on the ceiling of the PS cab, there is a problem that maintenance of the air conditioner is not easy. Further, when the vehicle body passes over an obstacle or the like, a large gravitational acceleration of several tens G (G: gravitational acceleration) acts on the air conditioner, and there is a problem that the air conditioner is easily damaged or broken. In the technique disclosed in Japanese Utility Model Laid-Open Publication No. 6-49552, a mounting bracket is provided so as to protrude at the rear of the driver's cab, and an air conditioner unit constituting the air conditioner is disposed on the lower side of the bracket. Then, the condenser is installed on the upper part of the air conditioner unit, and thus both are arranged in the vertical direction. As a result, the height of the upper part of the condenser becomes high, so that there is a problem that the rear view of the operator in the cab is not good. Further, there is also a problem that the appearance is not good because the vertically elongated projection is exposed at the rear of the cab. In Japanese Utility Model Laid-Open No. 2-51120,
An example is described in which an air conditioner is installed in parallel in the lower part behind the cab, but this is not the case in the ROPS operating room for bulldozers without a cab floor for arranging air conditioners in parallel in the lower part behind the cab. There is a problem that can not be applied.

An object of the present invention is to provide an air conditioner installation structure for a construction machine having a good appearance of a driver's cab, easy inspection and repair, and good assembling work, focusing on the problems of the prior art. .

[0005]

According to a first aspect of the present invention, a ROPS frame rubber-mounted on a vehicle body frame includes an upper portion of a driver's cab and left, right, front and rear windows. And a chamber bottom wall including a bottom wall that covers the upper side of the fuel tank and the hydraulic oil tank installed on the fenders on the left and right sides of the vehicle body, and a concave box-shaped bottom wall that enters between the fuel tank and the hydraulic oil tank. In the bulldozer ROPS operator's cab, the rear wall of the lower portion of the rear of the operator's cab closing the rear of the concave box-shaped bottom wall is drawn into the front side of the vehicle body to form a stepper space below the driver's cab rear, forming a bulldozer ROPS operator's cab. The air conditioner body is mounted on the stepped space by extending the air conditioner body mounting base from the rear wall in the rear direction, and the condenser body mounting frame is mounted from the rear support of the ROPS framework in the rear direction of the one-side tank. The placing the capacitor body laterally Te overhang has a configuration in which the air conditioner body and the capacitor body in the lateral direction are arranged in parallel.

According to the first invention, an air conditioner main body mounting base is provided on the rear wall of the lower part of the rear side of the driver's cab, and the air conditioner main body is mounted on the air conditioner main body mounting base and the fuel installed on the left and right sides of the vehicle body. A capacitor body mounting base is mounted on the rear side of the tank on either side of the tank or the hydraulic oil tank, extending from the rear support of the ROPS frame in the left-right direction, and the capacitor body is mounted on the capacitor body mounting base. Due to such a structure, even in a ROPS cab having no wide floor member outside the lower rear portion of the cab, the air conditioner main body and the condenser body can be arranged in a narrow space in parallel in the left-right width direction and installed. Since the air conditioner can be effectively used in a narrow space and can be arranged compactly, the rearward protrusion amount of the air conditioner can be reduced. Therefore, the air conditioner can be mounted compactly and firmly, and the appearance is good and the rear visibility from the driver's cab is good.
An OPS cab air conditioner mounting structure is obtained. Further, the worker can easily approach the mounting position of the air conditioner from the rear of the vehicle body at the time of assembling the air conditioner or performing inspection and repair, so that an air conditioner mounting structure with easy maintenance and good assembling work can be obtained. Furthermore, since the air conditioner is mounted at a low position, a large gravitational acceleration is not applied to the air conditioner even at the time of vibration or impact of the vehicle body, so that the air conditioner is not easily damaged or broken. In addition, since the vehicle body vibration and impact propagating from the vehicle body frame to the air conditioner body and the condenser are attenuated by the rubber mount for mounting the ROPS support, the air conditioner is unlikely to be damaged or broken.

In a second aspect based on the first aspect, the air conditioner main body and the condenser are connected to a rear left and right ROPS.
It is configured to be covered with a cover body attached between the columns.

According to the second aspect of the present invention, the air conditioner body and the condenser body are covered with the cover body attached between the rear left and right ROPS pillars, so that they can be protected from external dust and have a good appearance. An air conditioner mounting structure for the cab is obtained.

[0009]

An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of a bulldozer 1 to which the present invention is applied. In FIG. 1, the vehicle body frame 7
A pair of traveling devices 3 and 3 having crawler tracks 6
Is installed. An engine 5 is mounted on a front portion of the body frame 7, and the engine 5 is covered with a hood 4. The blade 2 disposed in front of the vehicle body frame 7 is attached to a pair of left and right traveling devices 3 and 3 via an arm 2 a so as to be vertically movable, and is driven up and down by a hydraulic cylinder 11. . A so-called ROPS-compatible driver's cab 8 is mounted at the rear of the body frame 7, and the driver's cab 8 is a support frame RO that constitutes the ROPS.
It has a PS support 10. An air conditioner 9 is mounted outside a rear wall 26 provided at a lower portion of a rear surface of the cab 8.

The internal structure of the ROPS cab 8 will be described with reference to FIGS. FIG. 2 is a side view, and FIG. 3 is a rear view. The ROPS support 10 is a ROPS cab 8
Front and rear supports 10a, 10a provided on the front left and right, rear supports 10b, 10b provided on the rear left and right, and front and rear and left and right directions between the left and right front supports 10a and the upper ends of the left and right rear supports 10b. Upper pillars 10c, 1 fixed to the
0c. The lower ends of the front support columns 10a and 10a and the rear support columns 10b and 10b are attached to the vehicle body frame 7 via a rubber mount 20 having an elastic support member such as rubber. The vibrations and shocks are attenuated and propagate to the ROPS cab 8. Left and right front struts 10
a, 10a, right and left rear supports 10b, 10b and four front and rear walls of the cab 8 surrounded by four upper supports 10c, 10c are provided with unillustrated walls having window frames and door frames. ing.

A fuel tank 21 for the engine 5 and a hydraulic oil tank 22 for a working machine actuator such as the cylinder 11 are installed above the fenders 12, 12 provided on the right and left rear portions of the body frame 7, respectively. I have. The cabin bottom wall 13 provided at the bottom of the cab 8 has a front support 1
0a, 10a and the rear supports 10b, 10b. The chamber bottom wall body 13 is mounted between the left and right bottom walls 23a and 23b covering the fuel tank 21 and the hydraulic oil tank 22, and between the fuel tank 21 and the hydraulic oil tank 22, and has a driver seat 24 in a concave portion thereof. And a floor wall 16 attached to the lower front part of the driver's seat 24. Further, a rear wall 26 provided at a lower portion of the rear surface of the cab 8 is attached so as to enter the cab side and close a rear portion of the concave portion of the concave box-shaped bottom wall 25, whereby a lower portion of the rear surface of the cab 8 is provided. A step space is formed at the bottom.

FIGS. 4 to 6 are a plan view, a side view, and a rear view (a Z view in FIG. 5) of the cab 8, respectively.
As shown in FIGS. 4 to 6, the shelf 27 is attached to the step space formed below the rear surface of the cab 8, and the condenser 28 of the air conditioner 9 and the air conditioner main body 29 are placed on the shelf 27. Is placed. As shown in FIG. 6, the condenser 28 is placed behind the fuel tank 21 and the air conditioner body 29 is placed behind the driver's seat 24 in parallel in the vehicle width direction. As shown in FIGS. 4 and 5, a cover 37 that covers the outside of the condenser 28 and the air conditioner main body 29 is attached to the lower rear portion of the cab 8. The rear wall 26 is provided with a grill (not shown) for introducing cool air or warm air sent from the air conditioner main body 29 into the cab 8.

The details of the shelf 27, that is, an air conditioner body mounting frame for mounting the air conditioner body and a capacitor body mounting frame for mounting the capacitor will be described with reference to FIGS. 7 and 8 show a plan view and a left side view, respectively, and FIG.
FIG. 8 shows a Y view of FIG. The shelf 27 is, as shown in FIG.
Shelf 30, left and right shelf supports 31, 32, and shelf support 33
Consists of As shown in FIG. 8, a pair of left and right shelf board receivers 31 and 32 is fixed to the back side of the vertical board section 30a and the upper board section 30b of the shelf board 30 formed by bending at a substantially right angle with a predetermined distance therebetween. I have. The upper plate portion 30b is mounted so as to extend rearward from the rear wall 26, and serves as a shelf plate on which the air conditioner 9 is mounted. The vertical plate portion 30a has a length substantially equal to the distance between the left and right shelf supports 31, 32 as shown in FIG. 9, and is formed in the vehicle width direction, and as shown in FIG. It is attached to a shelf 36 fixed to the shelf 26. Note that the upper plate portion 30b may be formed of a member separated from the vertical plate portion 30a.

A right end portion of a shelf support member 33 such as an angle material is fixed to the left side surface of the left shelf support 31, and the shelf support member 33 extends leftward from the left shelf support 31. ing. The left end portion of the shelf support member 33 is attached via a bracket 34 to a bracket seat 35 fixed to the left ROPS rear support post 10b.

As shown in FIG. 7, the right portion of the upper plate portion 30b has a length in the vehicle body width direction smaller than the interval between the hydraulic oil tank 22 and the fuel tank 21, and has the air conditioner main body 29.
Has a depth (width) L enough to place and support the. The left portion of the upper plate portion 30b has a width substantially equal to the upper surface width (depth) of the shelf support member 33 in the direction in which the shelf support member 33 extends, and projects to the vicinity of the bracket 34. It has been extended. The left lower surface of the upper plate portion 30b is fixed to the upper surface of the shelf support member 33. The left portion of the upper plate portion 30b and the shelf support member 33 are for mounting the condenser 28, and are mounted so as to project laterally from the left ROPS rear support post 10b.

Next, referring to FIG. 10 and FIG.
The cover 37 that covers the cover will be described. Cover body 37
The left, middle, and right covers 37a, 37b, 37c attached to the body frame 7 as shown in the rear view of FIG.
Left, middle and right covers 37a, 37b, 3
On the upper side of 7c, convex portions 37a slightly projecting outward are respectively provided.
t, 37 bt, and 37 ct are formed. Right cover 3
The projection 37ct of 7c is hinged to the middle cover 37b.
Are mounted on the convex portion 37bt so as to be rotatable in the left-right direction. A filter 39 for sucking outside air is attached to the right end of the air conditioner main body 29, and the filter 39
7b and in the vicinity of the hinge 38. The opening and closing of the convex portion 37ct of the right cover 37c causes the filter 39 to open.
Can be easily attached and detached. Also, the convex portions 37at, 37ct of the left and right covers 37a, 37c, respectively.
Are provided with ventilation grills 40 and 41. In addition, as shown in FIG. 11, a grill 42 for ventilation is provided on the left side of the left cover 37a, and a grill (not shown) for ventilation is similarly provided on the right side of the right cover 37c. .

Here, the flow of the refrigerant of the air conditioner 9 and the flow of the cooling water of the engine 5 will be briefly described. Refrigerant compressed by a compressor (not shown) driven by the engine 5 is sent to the condenser 28, and the refrigerant condensed (liquefied) by the condenser 28 is sent to the air conditioner main body 29 and introduced from inside the cab 8. The cooled air is cooled by heat exchange and returns to the compressor. The shorter the length of the refrigerant pipe between the condenser 28 and the air conditioner body 29, the higher the cooling efficiency can be maintained. Also,
In the case of heating, the high-temperature engine cooling water
The air that is sent to the cab 9 and heated from inside the cab 8 is heated by heat exchange, and returns to the engine 5 via a radiator (not shown). The compressor, refrigerant piping, and cooling water piping are not shown.

Next, the effects of this embodiment will be described. RO from the rear wall 26 at the lower rear of the cab 8
Shelf 2 lying in the vehicle width direction across PS rear support 10b
7, and a condenser 28 of the air conditioner 9 on one side (left side in the above embodiment) on the shelf 27 and behind the fuel tank 21, and an air conditioner body 29 on the other side and behind the driver's seat 24. , Side by side. This allows a worker on the ground surface to easily approach the mounting position of the air conditioner 9 from the rear of the vehicle body when installing the air conditioner 9 or performing inspection and repair. can get. Further, since the air conditioner 9 is mounted at a low position in the driver's cab and a large gravitational acceleration is not applied to the air conditioner 9 even when the bulldozer 1 or the like passes over an obstacle of a construction machine, the air conditioner 9 is hardly damaged or broken. . Further, the air conditioner 9 is mounted on the driver's cab 8 side where the vibration and shock on the vehicle body side are buffered by the rubber mount 20 via the shelf 27, so that the air conditioner 9 is not damaged by the vibration and shock on the vehicle body side. .

The left and right ROPS rear supports 1 in the width direction of the vehicle body.
An air conditioner 9 is mounted in a space between Ob and 10b, and in a space behind each of the driver's seat 24, the fuel tank 21 and the hydraulic oil tank 22 in the longitudinal direction of the vehicle body.
That is, a condenser 28 is provided in the space behind the fuel tank 21 and on the right side of the left ROPS rear support post 10b, and the air conditioner is provided in the space behind the driver's seat 24 and between the fuel tank 21 and the hydraulic oil tank 22. A main body 29 is provided. Thereby, the driver's seat 24, the fuel tank 21
And the narrow space behind the hydraulic oil tank 22 can be effectively used.
6 can be arranged compactly at the lower rear, and the amount of protrusion of the cover 37 that covers the outside of the air conditioner 9 from the rear can be small, so that the appearance is good and the visibility from behind the driver's cab 8 is good. Further, when the convex portion 37ct of the right cover 37c is opened, the filter 39 which needs to be frequently inspected and replaced is required.
, The inspection and replacement of the filter 39 can be easily performed.

In the above embodiment, the installation structure of the air conditioner used in the cab 8 of the ROPS structure has been described by taking the bulldozer of the construction machine as an example. The same effect can be achieved with an air conditioner installation structure for a driver's cab having a support frame.

In the above embodiment, the fuel tank 21
Although the example in which the condenser 28 is disposed behind and the air conditioner main body 29 is disposed behind the driver's seat 24 is shown, the present invention is not limited to this. It may be installed in a space corresponding to the size of the vehicle so that the amount of rear protrusion is reduced. Along with this, the left and right ends of the shelf (upper plate portion 30b in the embodiment) of the shelf 27 on which the air conditioner 9 is mounted are connected to the left and right support frames (the left ROPS rear support 10 in the embodiment).
When fixedly connected to b), it may be fixedly connected to at least one of the left and right support frames. As a result, the degree of freedom of the arrangement of the air conditioner is further increased, and the same effect as described above is obtained.

As described above, according to the present invention, the following effects can be obtained. A shelf that protrudes rearward is provided on the lower outside of the rear wall of the cab, and the air conditioner condenser and the air conditioner body are mounted in parallel on the shelf in the vehicle width direction. Since the position can be easily approached, inspection and repair can be easily performed, and an air conditioner installation structure with good assembling work can be obtained. Further, since the air conditioner is mounted at a low position in the driver's cab, a large gravitational acceleration is not applied to the air conditioner even when the vehicle body vibrates, so that the air conditioner is unlikely to break down. Furthermore, since the condenser and the air conditioner body are arranged in the width direction of the vehicle body and are arranged according to the size of the outer clearance on the rear wall of the cab,
The amount of protrusion of the air conditioner to the rear of the vehicle body is reduced, and the air conditioner is compact, has a good appearance, and can improve the rear visibility.

[Brief description of the drawings]

FIG. 1 is a side view of a bulldozer with an air conditioner.

FIG. 2 is a side view illustrating an internal structure of a ROPS cab.

FIG. 3 is a rear view illustrating the internal structure of the ROPS cab.

FIG. 4 is a plan view of an installation structure of an air conditioner according to the present invention.

FIG. 5 is a side view of an installation structure of an air conditioner according to the present invention.

FIG. 6 is a Z view of FIG. 5;

FIG. 7 is a plan view of a shelf on which an air conditioner is placed.

FIG. 8 is a side view of a shelf on which an air conditioner is placed.

FIG. 9 is a Y view of FIG. 8;

FIG. 10 is a rear view of a cover that covers the air conditioner.

FIG. 11 is a side view of a cover that covers the air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bulldozer, 2 ... Blade, 3 ... Traveling device, 4 ... Bonnet, 5 ... Engine, 6 ... Crawler track, 7 ... Body frame, 8 ... Driver's cab, 9 ... Air conditioner, 10 ... ROPS support,
10a: front support, 10b: rear support, 10c: upper support, 11: cylinder, 13: chamber bottom wall, 20: rubber mount, 21: fuel tank, 22: hydraulic oil tank, 23
a, 23b: left and right bottom walls, 24: driver's seat, 25: concave box-shaped bottom wall, 26: rear wall, 27: shelf, 28: condenser, 29: air conditioner body, 30: shelf board, 31, 32 ... left and right Shelf support 33, shelf support member 34, bracket 3,
5 ... bracket seat, 36 ... shelf seat, 37 ... cover body, 3
8 Hinge, 39 Filter.

Claims (2)

[Claims] 1. An RO mounted on a body frame with a rubber.
In the PS frame, a chamber wall including the upper part of the driver's cab (8) and the left and right front and rear windows, and a fuel tank (21) and a hydraulic oil tank (22) installed on fenders (12) on the left and right sides of the vehicle body. Cover the bottom wall (23a, 2
3b), and a ROPS cab for a bulldozer configured by attaching a chamber bottom wall (13) including a concave box-shaped bottom wall (25) inserted between the fuel tank (21) and the hydraulic oil tank (22). The operator cab (8), which closes the rear of the concave box-shaped bottom wall (25), pulls in the rear wall (26) at the lower rear side toward the front of the vehicle body, and
(8) ROP for bulldozer with stepped space formed below rear surface
S cab, the air conditioner main body is mounted on the stepped space by extending the air conditioner main body mounting base from the rear wall (26) rearward, and the condenser body mounting base is mounted from the rear support of the ROPS frame in the rear direction of the one side tank. Overhang and place the capacitor body,
A structure for mounting an air conditioner in a ROPS cab, wherein an air conditioner body (29) and a condenser body (28) are arranged in parallel in a left-right direction. 2. The ROPS cab air conditioner mounting structure according to claim 1, wherein the air conditioner body (29) and the condenser body (28) are mounted on a cover body (37) mounted between the left and right ROPS columns. A structure for mounting an air conditioner in a ROPS cab, wherein the air conditioner is covered.