CA1075524A - Environmental control system for a track laying tractor - Google Patents
Environmental control system for a track laying tractorInfo
- Publication number
- CA1075524A CA1075524A CA272,934A CA272934A CA1075524A CA 1075524 A CA1075524 A CA 1075524A CA 272934 A CA272934 A CA 272934A CA 1075524 A CA1075524 A CA 1075524A
- Authority
- CA
- Canada
- Prior art keywords
- cab
- ductwork
- control system
- rear wall
- filter housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ENVIRONMENTAL CONTROL SYSTEM FOR
A TRACK LAYING TRACTOR
Abstract of the Disclosure The cab of a track laying tractor is provided with an environmental control system including inlet ductwork located so as to be directly behind an operator's seat in the cab and de-fined in part by the backwall of the cab and including a fresh air inlet located in the rearwall of the cab and a recirculation air inlet located inside the cab adjacent the rearwall thereof.
Fresh air and recirculating air filters and heater and evaporator cores are located in the inlet ductwork directly behind the oper-ator's seat. A pair of fans are respectively located in control consoles provided on each side of the seat and are connected to the inlet ductwork for drawing air in through the filters and heater and evaporator cores and are connected to force air out through conditioned air outlets in the top of the control con-soles.
A TRACK LAYING TRACTOR
Abstract of the Disclosure The cab of a track laying tractor is provided with an environmental control system including inlet ductwork located so as to be directly behind an operator's seat in the cab and de-fined in part by the backwall of the cab and including a fresh air inlet located in the rearwall of the cab and a recirculation air inlet located inside the cab adjacent the rearwall thereof.
Fresh air and recirculating air filters and heater and evaporator cores are located in the inlet ductwork directly behind the oper-ator's seat. A pair of fans are respectively located in control consoles provided on each side of the seat and are connected to the inlet ductwork for drawing air in through the filters and heater and evaporator cores and are connected to force air out through conditioned air outlets in the top of the control con-soles.
Description
`
1C~755Z4 A TRACK LAYING TRACTOR
The present invention relates to a tractor environmental con-trol system.
Heretofore, tractor cabs have often been provided with an environmental control system which was located for the most part in a compartment at the top of the cab. Accordingly, this has required conditioned air to be discharged downwardly toward the operator, such discharge being disagreeable to some operators.
Further, when the filter elements of these environmental control system are serviced, dirt and the like from the filters are apt to fall onto the serviceman and into the interior of the cab.
Summary of the Invention According to the present invention, there is provided a novel environmental control system and re particularly there is provided a control system located so as to enhance the effective-ness of its operation.
A broad object of the invent-on is to provide an environ-mental control system which is integrated into the structure of the cab and control consoles contained in the cab.
A further object of the invention is to provide an environ-mental control system including a pair of fans located such as to effect an even distribution of conditioned air in the cab.
Yet another object of the invention is to provide an air conditioning system wherein the conditioned air is directed to-wards the opposite side of an operator.
A further object of the invention is to provide an environ-mental control system having a fresh air filter which is service-able from the interior of the cab but which may be left com-pletely exteriorly of the cab.
These and other objects will become apparent from a readingof the following description taken in conjunction with the appended drawings.
- 1 - q~
1 Brief Description of the Drawings Fig. 1 is a perspective view taken looking slightly upwardly at the left side and rear of an industrial vehicle incorporating the environmental control system of the present invention.
Fig. 2 is a perspective view looking downwardly at the front and top portion of an operator's seat flanked by control consoles and having ductwork of the environmental control system located therebehind and leading to the control consoles.
Fig. 3 is a somewhat schematic right side elevational view, partly in section, of a portion of the cab and showing the arrange-ment of components of the environmental control system.
Fig. 4 is a top plan view showing a portion of the access door of the fresh air filter compartment of the environmental control system.
Description of the Preferred Embodiment Referring now to Fig. 1, therein is shown an industrial vehicle, commonly known as a crawler-loader, the crawler-loader being indicated in its entirety by the reference numeral 10.
It is to be understood that the crawler-loader 10 is only repre-sentative of the type of vehicle with which the present inventionis particularly adapted for use and that many other vehicles could just as well be used without departing from the principles of the present invention.
The crawler-loader 10 includes a chassis 12 to which right and left track assemblies 14 are connected in a conventional man-ner. An engine housing 16 is located on the forward portion of the chassis 12 and a loader boom support structure 18 is located adjacent the rear of the engine housing 16 and has a rear end of a boom structure 20 connected thereto. Connected to the for-ward end of the boom structure 20 is a bucket 22.
Mounted on the chassis 12 just rearwardly of the enginehousing 16 is a cab 24 which is connected to the chassis 12 1 through means of a rollover protection frame 26. Extending across the rear of the crawler-loader 10 is a fluid reservoir or tank structure 28 that is m~unted on the top of a transmission hous-ing 32 forming part of the chassis 12.
The cab 24 has a rear wall 34 which is shaped so as to ex-tend along the forward and top sides of the fluid reservoir 28.
Located in the rear cab wall 34 at a location above the reservoirs 28 is a generally rectangular window 36 having its upper edge con-nected to the framework of the cab through means of a rubber hinge structure 38 for permitting the window to be moved between open and closed positions. The lower end of the window has guide straps 40 fixed to opposite lower locations thereof for permit-ting the window to be locked in adjusted partially opened posi-tions through means of threaded knob assemblies, one of which is shown partially at 42. The mounting of the window 36 is conven-tional.
Referring now to Figs. 2 and 3, therein is shown an oper-ator's seat 44 mounted on a central rear portion of a floor 46 of the cab 24 and being flanked by right and left box-like con-trol consoles 48 and 50, respectively, as considered looking in -the normal direction of forward travel of the crawler-loader.
Right and left arm rests 52 and 54 are respectively mounted on upper inside corners of the console 48 and 50. Various control levexs project through walls of the control console 48 and 50 and are disposed so as to be within easy reach of a seated operator.
The linkages that are connected to the levers are omitted for the sake of simplicity.
Integrated in t~at portion of the cab thus far described is an environmental control system including intake air ductwork, indicated generally at 56 f which extends between right and left side walls 58 and 60 of the cab 24 at a location behind the seat 44. The ductwork 56 projects through the rear wall 34 of the - 10755Z4 ~
1 cab at a location just below the window 36 and has an outer end portion which defines a fresh air filter compartment 62 including an access door 64 vertically hingedly mounted for movement about a horizontal transverse axis at 66 and including a normally rear-wardly disposed surface having a fresh air inlet therein which is covered by a screen 68 (Fig. 1). Located in the compartment 62 so as to be accessible when the door 64 is open is a fresh air filter 70 which is normally held in place by guides fixed to the interior of the opposite compartment sides. Located in a general-ly horizontal top wall portion 72 of the duct just inwardly of the rear wall 34 of the cab is a recirculated air inlet 74 surrounded by a filter retainer means 76 in which is located a recirculated air filter (not shown). Supported so as to be located centrally in the ductwork 56 at a location just downstream from the air inlet 74 is an air conditioning cooler core 78 and a heater heat-ing core 80. A wall means 82 (Fig. 3) extends between the walls of the ductwork 56 and the cooler core 78 to ensure that air drawn in through the filters will pass through the cores 78 and 80.
In order to accommodate the fluid resexvoir 28, the rear cab wall 34 has a lower portion 84 which is inclined downwardly and forwardly from the rear. This lower portion 84 of the cab ; wall 34 forms a bottom wall of the ductwork 56. Located just behind the seat 44 and forming part of the ductwork 56 is a generally vertical wall 86 which, as shown here, has opposite transverse edges which terminate at vertical rear edges of respec-tive inner walls 88 and 90 of the right and left control consoles 48 and 50. The respective rear ends of the box-like control con-soles 48 and 50 are open and form part of the ductwork 56 as is described in more detail herein below. Respectively located in the consoles 48 and 50 are right and left fans 92 and 94. Form-ing an integral part of the fans 92 and 94 are conditioned air outlet ductworks 96 and 98 respectively defining upwardly opening outlets 100 and 102. The consoles 48 and 50 respectively include top covers 104 and 106 which respectively contain adjustable louvers 108 and 110 which are respectively located above the outlets 100 and 102.
Thus, with reference to Figs. 2 and 3, it will be appreciated that the fans 92 and 94 will act to draw air into the ductwork 56 by way of the fresh air inlet defined by the screen 68 and by way of the recirculated air inlet 74. Once the air has been 10 drawn through the filters and cooling and heating cores of the environmental control system, it will be separated into two streams which flow into the intakes of the fans 92 and 94 by way of the open rear end portions of the consoles 48 and 50. The fans will force the conditioned air out through the louvers 108 and 110 in the control console covers 104 and 106.
Thus, it will be appreciated that the environmental control systems of the present invention is incorporated in the cab and console structure of the vehicle.
When the filters require servicing, the serviceman may open 20 the door 64 of the fresh air filter compartment 62 either from a location exteriorly of the cab 24 or from within the cab 24 once the window 36 is opened. The serviceman can then replace the used filter or knock dirt therefrom and place it back in service without the used filter ever being inside the cab. This, of course, eliminates the possibility that dirt will be deposited in the cab during the process of servicing the fresh air filter 78.
The recirculated air filter is in the cab and of course remains there during servicing however, only a small amount of 30 dirt will usually be present therein and the problem of falling therefrom into the cab is insubstantial as compared to what the problem would be if the fresh air filter were located in the cab.
1C~755Z4 A TRACK LAYING TRACTOR
The present invention relates to a tractor environmental con-trol system.
Heretofore, tractor cabs have often been provided with an environmental control system which was located for the most part in a compartment at the top of the cab. Accordingly, this has required conditioned air to be discharged downwardly toward the operator, such discharge being disagreeable to some operators.
Further, when the filter elements of these environmental control system are serviced, dirt and the like from the filters are apt to fall onto the serviceman and into the interior of the cab.
Summary of the Invention According to the present invention, there is provided a novel environmental control system and re particularly there is provided a control system located so as to enhance the effective-ness of its operation.
A broad object of the invent-on is to provide an environ-mental control system which is integrated into the structure of the cab and control consoles contained in the cab.
A further object of the invention is to provide an environ-mental control system including a pair of fans located such as to effect an even distribution of conditioned air in the cab.
Yet another object of the invention is to provide an air conditioning system wherein the conditioned air is directed to-wards the opposite side of an operator.
A further object of the invention is to provide an environ-mental control system having a fresh air filter which is service-able from the interior of the cab but which may be left com-pletely exteriorly of the cab.
These and other objects will become apparent from a readingof the following description taken in conjunction with the appended drawings.
- 1 - q~
1 Brief Description of the Drawings Fig. 1 is a perspective view taken looking slightly upwardly at the left side and rear of an industrial vehicle incorporating the environmental control system of the present invention.
Fig. 2 is a perspective view looking downwardly at the front and top portion of an operator's seat flanked by control consoles and having ductwork of the environmental control system located therebehind and leading to the control consoles.
Fig. 3 is a somewhat schematic right side elevational view, partly in section, of a portion of the cab and showing the arrange-ment of components of the environmental control system.
Fig. 4 is a top plan view showing a portion of the access door of the fresh air filter compartment of the environmental control system.
Description of the Preferred Embodiment Referring now to Fig. 1, therein is shown an industrial vehicle, commonly known as a crawler-loader, the crawler-loader being indicated in its entirety by the reference numeral 10.
It is to be understood that the crawler-loader 10 is only repre-sentative of the type of vehicle with which the present inventionis particularly adapted for use and that many other vehicles could just as well be used without departing from the principles of the present invention.
The crawler-loader 10 includes a chassis 12 to which right and left track assemblies 14 are connected in a conventional man-ner. An engine housing 16 is located on the forward portion of the chassis 12 and a loader boom support structure 18 is located adjacent the rear of the engine housing 16 and has a rear end of a boom structure 20 connected thereto. Connected to the for-ward end of the boom structure 20 is a bucket 22.
Mounted on the chassis 12 just rearwardly of the enginehousing 16 is a cab 24 which is connected to the chassis 12 1 through means of a rollover protection frame 26. Extending across the rear of the crawler-loader 10 is a fluid reservoir or tank structure 28 that is m~unted on the top of a transmission hous-ing 32 forming part of the chassis 12.
The cab 24 has a rear wall 34 which is shaped so as to ex-tend along the forward and top sides of the fluid reservoir 28.
Located in the rear cab wall 34 at a location above the reservoirs 28 is a generally rectangular window 36 having its upper edge con-nected to the framework of the cab through means of a rubber hinge structure 38 for permitting the window to be moved between open and closed positions. The lower end of the window has guide straps 40 fixed to opposite lower locations thereof for permit-ting the window to be locked in adjusted partially opened posi-tions through means of threaded knob assemblies, one of which is shown partially at 42. The mounting of the window 36 is conven-tional.
Referring now to Figs. 2 and 3, therein is shown an oper-ator's seat 44 mounted on a central rear portion of a floor 46 of the cab 24 and being flanked by right and left box-like con-trol consoles 48 and 50, respectively, as considered looking in -the normal direction of forward travel of the crawler-loader.
Right and left arm rests 52 and 54 are respectively mounted on upper inside corners of the console 48 and 50. Various control levexs project through walls of the control console 48 and 50 and are disposed so as to be within easy reach of a seated operator.
The linkages that are connected to the levers are omitted for the sake of simplicity.
Integrated in t~at portion of the cab thus far described is an environmental control system including intake air ductwork, indicated generally at 56 f which extends between right and left side walls 58 and 60 of the cab 24 at a location behind the seat 44. The ductwork 56 projects through the rear wall 34 of the - 10755Z4 ~
1 cab at a location just below the window 36 and has an outer end portion which defines a fresh air filter compartment 62 including an access door 64 vertically hingedly mounted for movement about a horizontal transverse axis at 66 and including a normally rear-wardly disposed surface having a fresh air inlet therein which is covered by a screen 68 (Fig. 1). Located in the compartment 62 so as to be accessible when the door 64 is open is a fresh air filter 70 which is normally held in place by guides fixed to the interior of the opposite compartment sides. Located in a general-ly horizontal top wall portion 72 of the duct just inwardly of the rear wall 34 of the cab is a recirculated air inlet 74 surrounded by a filter retainer means 76 in which is located a recirculated air filter (not shown). Supported so as to be located centrally in the ductwork 56 at a location just downstream from the air inlet 74 is an air conditioning cooler core 78 and a heater heat-ing core 80. A wall means 82 (Fig. 3) extends between the walls of the ductwork 56 and the cooler core 78 to ensure that air drawn in through the filters will pass through the cores 78 and 80.
In order to accommodate the fluid resexvoir 28, the rear cab wall 34 has a lower portion 84 which is inclined downwardly and forwardly from the rear. This lower portion 84 of the cab ; wall 34 forms a bottom wall of the ductwork 56. Located just behind the seat 44 and forming part of the ductwork 56 is a generally vertical wall 86 which, as shown here, has opposite transverse edges which terminate at vertical rear edges of respec-tive inner walls 88 and 90 of the right and left control consoles 48 and 50. The respective rear ends of the box-like control con-soles 48 and 50 are open and form part of the ductwork 56 as is described in more detail herein below. Respectively located in the consoles 48 and 50 are right and left fans 92 and 94. Form-ing an integral part of the fans 92 and 94 are conditioned air outlet ductworks 96 and 98 respectively defining upwardly opening outlets 100 and 102. The consoles 48 and 50 respectively include top covers 104 and 106 which respectively contain adjustable louvers 108 and 110 which are respectively located above the outlets 100 and 102.
Thus, with reference to Figs. 2 and 3, it will be appreciated that the fans 92 and 94 will act to draw air into the ductwork 56 by way of the fresh air inlet defined by the screen 68 and by way of the recirculated air inlet 74. Once the air has been 10 drawn through the filters and cooling and heating cores of the environmental control system, it will be separated into two streams which flow into the intakes of the fans 92 and 94 by way of the open rear end portions of the consoles 48 and 50. The fans will force the conditioned air out through the louvers 108 and 110 in the control console covers 104 and 106.
Thus, it will be appreciated that the environmental control systems of the present invention is incorporated in the cab and console structure of the vehicle.
When the filters require servicing, the serviceman may open 20 the door 64 of the fresh air filter compartment 62 either from a location exteriorly of the cab 24 or from within the cab 24 once the window 36 is opened. The serviceman can then replace the used filter or knock dirt therefrom and place it back in service without the used filter ever being inside the cab. This, of course, eliminates the possibility that dirt will be deposited in the cab during the process of servicing the fresh air filter 78.
The recirculated air filter is in the cab and of course remains there during servicing however, only a small amount of 30 dirt will usually be present therein and the problem of falling therefrom into the cab is insubstantial as compared to what the problem would be if the fresh air filter were located in the cab.
Claims (6)
1. In combination with a vehicle cab including a rear wall and a floor and an operator seat mounted on the floor between right and left hollow control consoles; an environmental control system comprising: ductwork projecting through the rear wall at a central location behind the operator seat and defining a fresh air inlet; said ductwork extending into the cab and including right and left branches respectively extending into said right and left control consoles; right and left fans respectively located in the right and left consoles and having inlets coupled to said right and left branches of the ductwork; right and left conditioned air outlets being respectively located in correspond-ing wall portions of said right and left control consoles and connected to respective outlets of the right and left fans.
2. The combination defined in claim 1 wherein the ductwork forms a filter housing adjacent the rear wall; said housing including a door means located outside of the cab and selectively openable to permit access to the interior of the filter housing;
and a fresh air filter being located in the filter housing.
and a fresh air filter being located in the filter housing.
3. The combination defined in claim 2 wherein the cab rear wall includes a window located adjacent the filter housing and mounted for movement between open and closed positions so as to provide access to the filter housing from the inside of the cab when the window is open.
4. The combination defined in claim 1 wherein said ductwork is defined in part by wall portions of the cab.
5. The combination defined in claim 1 wherein a recircu-lated air inlet in the cab leads into said ductwork at a location adjacent the rear wall of the cab.
6. The combination defined in claim 1 wherein heater and evaporator coil means are located in the ductwork upstream from the right and left branches.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67352576A | 1976-04-05 | 1976-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1075524A true CA1075524A (en) | 1980-04-15 |
Family
ID=24703009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA272,934A Expired CA1075524A (en) | 1976-04-05 | 1977-03-01 | Environmental control system for a track laying tractor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1075524A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308279A (en) * | 1991-10-28 | 1994-05-03 | Caterpillar Inc. | Air circulatory system for an enclosure |
| US6126539A (en) * | 1998-10-01 | 2000-10-03 | Caterpillar S.A.R.L. | Pilot valve mounting which functions as a hot air duct |
-
1977
- 1977-03-01 CA CA272,934A patent/CA1075524A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308279A (en) * | 1991-10-28 | 1994-05-03 | Caterpillar Inc. | Air circulatory system for an enclosure |
| US6126539A (en) * | 1998-10-01 | 2000-10-03 | Caterpillar S.A.R.L. | Pilot valve mounting which functions as a hot air duct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |