JPS60201022A - Cooling apparatus for hydraulic drive type skid loader - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates generally to a cooling system incorporating a stationary radiator and oil cooler combination.

More particularly, the present invention relates to an improved cooling system for a skid steer loader that includes two sets of air-to-liquid heat exchangers, one set being heat exchangers for the engine cooling medium and the other set being heat exchangers for the engine cooling medium. are for hydraulic working fluids, which are mounted and positioned for pivoting movement above the engine and spaced apart for ease of cleaning, maintenance, etc.

(Prior Art) A skid stayer loader, also known as a skid turn loader, is a simple vehicle with extremely excellent maneuverability. The wheels of the vehicle are therefore driven individually and independently, and the steering action is achieved by operating the wheels of the vehicle at different speeds and in different directions. Hydraulic transmissions are usually used for the driving and steering functions. The driver sits in front of the engine between a pair of hydraulically operated operating arms. This operating arm can carry packets, hooks, forks, augers, and other attachments. The driver's cabin is equipped with appropriate control elements for operating the vehicle and load actuating arms, as well as any power equipment installed on the Rogue. Turning maneuver (5kid Steering)
), it is necessary for such a vehicle to have relatively short distances between the front and rear wheel axles and a distance between the left and right wheel axles. Furthermore, by suitably selecting the weight ratio on the front and rear wheel axles, loaded and unloaded, the maneuverability can be improved.

Therefore, the skid steer loader must be designed simply to facilitate turning maneuverability as well as load handling, and must be designed so that the front and rear axle weight ratios are within the desired range.

When the loader is empty or unloaded, most of the weight is placed on the rear wheel axle, and when loaded, the loader is placed on both wheels so that the load is properly balanced. It is desirable to distribute the weight between the axles.

This ultimately means that the engine and its associated accessories, which account for the bulk of the weight, are located at the rear and relatively close to the rear wheel axle. Furthermore, it is desirable that these equipment members be placed as low as possible in order to keep the center of gravity low and improve the stability of the vehicle. Some skid steer loaders are equipped with air-cooled engines, but most are equipped with liquid-cooled engines, and this type of cooling system is naturally a consideration in their design.

In the past, the general philosophy for skid steer loader cooling systems was to stack them in longitudinally aligned positions behind the engine. That is, the fan, radiator, and oil cooler were stacked and aligned at the rear of the engine.

However, this arrangement is relatively expensive, which impairs the overall simplicity of the vehicle, and furthermore, it is difficult to get close to the engine for engine operation, maintenance, and other purposes! there were.

For this reason, cooling devices of such simplified design have been developed for the skid stay rotor 1. However, this does not mean that these developed products are without defects. For example, Vidramac type (H
ydra-Mac) Is the skid stay loader at the rear? Two radiators are installed on the door of the diary. The radiator of the skid stay loader disclosed in U.S. Pat. No. 3,828,952 is located above the engine and has a pair of fans, and these fans are located between the radiator and the grill in the rear of the engine. There is. More recently, U.S. Pat. No. 4,117,902 describes a skid stay loader.
A cooling system is disclosed in which air is drawn from the rear grille by a fan located forward of the engine, then passed through an oil cooler and two radiators mounted on top of the engine compartment and discharged to the outside. Although this last-mentioned arrangement of devices has the advantage of simplicity due to its longitudinal arrangement even more so than the arrangement of axial cooling devices belonging to the prior art, it is not convenient for the operation of the engine and the associated accessories. They are not located for easy access or facilitate cleaning of the engine radiator or oil cooler2, which means that cleaning is time consuming and expensive. Additionally, skid steer loaders are generally operated under adverse conditions.
It must be kept in mind that they are often operated under severe operating and maintenance conditions. Conventional cooling systems severely restricted access to the ennon and related accessories, and required at least partial disassembly to clean or access the radiator or oil cooler. As a result, it was time consuming and expensive.

Thus, a need arises for an improved cooling system for a skid steer loader that avoids the deficiencies caused by conventional axial array configurations. In addition to its simplicity of construction, the improved system of the present invention allows easy access to the engine, oil cooler and radiator without disassembly or disassembly of the components.

(Means for Solving the Problems) The present invention relates to an assembly constituted by a swing-up radiator and an oil cooler for a skid stayer loader, which assembly overcomes the difficulties arising from the prior art described above. Overcome.

The present invention constitutes an improvement over the invention of U.S. Pat. No. 4,117,902 and provides a cooling assembly particularly adapted for use in skid steer loaders. The cooling assembly is comprised of a pair of air-to-liquid heat exchangers, one heat exchanger being a hydraulically operated liquid cooling radiator and the other heat exchanger being an engine coolant cooling radiator. These are provided in a stacked arrangement above and slightly in front of the engine.

These heat exchangers S4H are supported on respective shelves which are rotatably mounted within one of the uprights about a generally longitudinal axis between a raised upper position and a lowered lower position. Independently pivoted. Preferably, the lower shelf with oil cooler is supported at its free end in a lower position by a bracket provided within the opposite upright member opposite said upright member. Also preferably, the upper shelf containing the engine radiator is provided with a latch located above said lower shelf in the lower position and with which said upper shelf can be lowered positively into the lower position. The metal handle portion is also configured to hold the upper shelf in the raised position or, if releasably coupled, to hold both shelves. Each of the above phases is independently pivoted, allowing for easy cleaning of both sides of either internal radiator, as well as its engine and associated components, including fans and shrouds mounted below. You can get close to the attached equipment parts. The present invention will be more clearly understood from the description of the embodiments set forth in the following sections with reference to the accompanying drawings.

(Example) Now, referring to the drawings, the same reference numerals throughout the drawings indicate the same or corresponding partial elements. Specifically, FIG. 1 is a general view of a skid steer loader 10 having an improved cooling system incorporating the present invention. This loader 10 has a pair of left and right front wheels 12 and a pair of rear wheels 14, one of which is shown in the figure.

These wheels have short distances between the front and rear axles and narrow tread dimensions to facilitate maneuverability.

The driver's cabin consists of a roll cage 18 protected by a metal mesh and a seat 20, which is located between a pair of lifting arms 22. The inner end of the lifting arm 22 is connected to the vehicle frame 28.
It is connected to a pivot 24 on an upright member 26 erected at the rear of the holder. A packet-like product 30 is used as a lifting arm 22.
At the pivot point 32 at the outer end of the
Concatenated with only parts shown. The lifting and lowering actions of the lifting arm 22 are performed by a pair of double-acting cylinders 34.
One is connected between a pivot 36 on each lifting arm and a pivot 38 on the upright member 26. The tilting motion of the packet 30 is accomplished by a single double-acting cylinder 40 which is coupled between the packet 30 and a cross member (not shown) extending between the lifting arms. Driver's cabin 1
6 is provided with appropriate control members for controlling the loader 10, the lifting arm 22, and the packet 30. The engine 42 is located behind the driver's cabin 16 and between the upright members 26 on either side. The rear door 44 is the engine 4
2 and its associated parts. As will be detailed later, the skid stay loader is equipped with a cooling system characterized by an assembly of a raised radiator and an oil cooler, which facilitates operation, maintenance, cleaning, etc. located so that it can be easily accessed.

Reference is now made to FIGS. 2 and 5. An engine 42 is housed in an engine compartment 46 in the figure. The engine 42 may be of a liquid-cooled type, and the internal combustion engine may be of a gas combustion type or a diesel type. The rear-mounted engine 42 is a variable displacement pump that drives a conventional tandem pump system (not shown) that independently drives six pairs of wheels 12 and 14. It is connected to the hydraulic drive motor of each hydraulic transmission provided for this purpose.

The cooling system 48 of the loader 10 has a fan 50 driven by the engine. The 77 cylinder 50 is disposed inside a cover wall 52 extending upwardly between the engine 42 and the fire extinguishing wall or transverse beam 54 extending between the upright members 26 on both sides. A fuel tank (not shown) is provided deep inside between the backrest of the seat 20 and the cross beam member 54. An air inlet 56 and an air outlet 58 are formed in the cover wall 52 .

Outside air is drawn in through the armored window 59 in the door 44, passes over the engine 42, and is drawn into the inlet 56. The induced air passes under the seat 20 by the fan 50 and enters the inlet 56.
The oil then flows upwardly through the shroud 52 through the fan 50, through the outlet 58, and through the raised radiator and oil cooler assembly 60 of the present invention. As will be explained in more detail below, the swing-out radiator and oil cooler assembly 60 independently controls the pivoting movement of the two zoators to facilitate operation, maintenance, and cleaning thereof. In this case, the tapping section can be loosened without disassembling the assembly members.

Now, referring to FIGS. 2 to 7, the raised radiator and the oil cooler 60 are arranged above the engine 42 and substantially in front of the engine in a vertically overlapping positional relationship.

The assembly 60 includes a lower sheath 62 having a generally rectangular frame structure for retaining an oil cooler 64 therein. The periphery of the lower sheath 62 is generally L-shaped in cross section to allow air to flow through the oil cooler while retaining the cooler therein. Oil cooler 64 comprises a conventional air-to-liquid heat exchanger of heavy duty construction, which is connected to wheels 12 and 1 of loader 10.
4 and for cooling the hydraulic fluid used to operate the lifting arm 22. The oil cooler 64 has a normal structure with a pair of headers 65 on both sides.
, one of which is clearly shown in FIG. Mounting fittings 66 and 68 are coupled to the header.

For attachment, hoses 70 and 72 are connected to the fittings 66 and 67, respectively, so that the nuclear oil cooler is positioned directly above the outlet 58 of the fan cover wall 52 when the lower sheath 62 is in the lower position.

The lower sheath 62 is pivotable between a lower position and an upper position, as shown in FIGS. 3 and 4. Specifically, a pair of side legs or extensions 74 are formed on the negative side of the lower sheath 62 to permit pivoting movement about a generally longitudinal axis 78 (FIG. 2). 76. As shown, one extension leg portion 74 and its pivot portion 76 are provided on the cross beam member 54, and the other extension leg portion and its pivot portion are mounted on a bracket 80 formed to support a muffler 82. It is being The bracket 80 is fixed inside one of the uprights 26 and behind the crossbeam 54 (adjacent to 10).

Another bracket 84 is mounted on the other upright section 26 opposite and supports the free end of the upper shelf 62 at its lower position 17N. The raised radiator and oil cooler assembly 60 also includes a second air-to-liquid heat exchanger 88. The upper shelf is similarly made of a substantially rectangular frame structure, and has an L-shaped cross-section periphery at the periphery to allow air to pass through the periphery. In particular, this second heat exchanger 88 serves to circulate a cooling liquid medium to the engine 42. The second heat exchanger 88 is of conventional construction including a pair of headers 90 and 92. These headers 90 and 92 have mounting fittings coupled to opposite ends thereof, and further have hoses 94 and 96 attached thereto.
are connected to each other.

A removable lid 98 is formed on the header 90 and is utilized for replacing the cooling medium. As with the upper shelf 62, the upper shelf 86 is formed with a pair of side legs or extensions 100 connected by pivot joints 102 and extending along a generally longitudinal axis 10.
Pivotal movement around 4 is enabled. One extension leg 100 and its pivot joint are mounted on the cross beam 54, and the other extension leg and its pivot joint are mounted on the bracket 8.
It is installed on 0. Therefore upper shelf 62 and upper shelf 8
6 are stacked and independently pivotable about spaced apart generally longitudinal axes 78 and 104, which axes are mutually offset both vertically and laterally. It is clear that it has been formed.

The entire hook mechanism is mounted on the upper shelf 86. This is primarily for lowering and removably securing the upper shelf towards the lower plate 62 to the lower position and for retaining the upper shelf in the upper position.

The entire mechanism of this hanger is formed from a bar 106 in the shape of an abbreviation having an elongated bar-shaped portion, which is inserted through an opening provided at the free end of the upper shelf 86 and secured by a washer and a horizontal frame 108. Ru.

A knob 110 is formed at the end of the elongated portion of the rod 106;
As best shown in FIG. 6, it engages a notched groove 112 formed in the inner surface of the adjacent upright member 26. A hook 114 is formed at the end portion of the rod 106 which is formed relatively long in the lateral direction, and this hook 114 is formed in the extension portion 100 which is the longest in the rearward direction of the upper shelf 86.
The hook is used to engage either the engagement hole 116 of the upright member 26 or the aperture 118 of the adjacent upright member 26 . The end 114 of the rod 106 is the opening 11
When the hook 8 is fastened, the knob 110 engages the notch 112, and the radiator and oil cooler assembly 60 is positioned and fixed at a lower position directly above the outlet 58 of the fan cover wall 52. This causes air to flow across the oil cooler 64 and then through the radiator 88 and upwardly toward the grille (not shown) for discharge outside the engine compartment. When it is still desired to raise the upper shelf 66, the lateral portions of the rods 106 are bent outwardly to remove their ends 114 from the openings 116 so as to stand up. With this, if the knob 110 is removed, the upper shelf 8
6 can be raised to the raised position shown in FIG.

The end 114 of the rod 106 can then be engaged with the aperture 118 on the upright member 26 to hold the upper shelf 66 in the raised position. A handle portion 120 is preferably formed on the upper shelf 86 to facilitate the lifting action.

Thus, the radiator and oil cooler assembly 60 described above is comprised of two separately spaced air-to-liquid heat exchangers or radiators 64 and 88 arranged in a stack above the engine compartment 46. It will be appreciated that the cylindrical parts may be individually and independently pivotally supported about the circumference of the pivot axes 78 and 104. The radiators 64 and 88 are supported within respective columns 62 and 86 of a generally rectangular frame and may be arranged in a stacked relationship in a normal, lowered position. In that case, the lower shelf will be placed on the bracket 84, the upper shelf will be placed on the upper surface thereof, and the hook will be fixed in the normal state by the metal 110. Upper radiator 88 may be releasably secured in an upper position via rod 106 and opening 118. When the upper radiator is lifted to the upper position, a hook 122 is provided which can be used to further lift the lower radiator and which can be secured to the nondle 12 or other suitable portion of the upper shelf 86 if desired. It can also be fixed in an open position in the upper position by using the . As shown, the hook 122 is pivotally mounted on the lower shelf and provided with a handle 120 on the upper shelf 86 for movement to lock and unfasten the hook.

From the foregoing, it is clear that the present invention provides a uniquely improved cooling system characterized by a unique swing-up radiator and oil cooler assembly which has various advantages over the prior art. Let's become.

The invention disclosed herein is particularly suitable for use in vehicles having a configuration such as a skid steer loader. The engine compartment is subject to the compact and cramped design typical of such vehicles. The present invention includes two spaced apart radiators that are independently pivoted between an upper position and a lower position, thereby providing easy access to either side of each radiator or to each radiator. It also provides easy access to the engine and its related accessories for operation, maintenance, cleaning, etc. The above-mentioned swing-up radiator and oil cooler assembly and their connecting hoses are constructed so that they cannot be disassembled at all. Other advantages will be apparent to those skilled in the art.

Although embodiments of the invention have been described in detail and with reference to the accompanying drawings, the invention is not limited to the foregoing disclosed embodiments, and may include other embodiments and equivalents. It goes without saying that the objects, modifications, and arrangements of various components may be designed to be practicable within the scope of the claims.

Margin below

[Brief explanation of the drawing]

FIG. 1 is a side view of a skid steer loader incorporating an improved cooling system according to the present invention, the cooling system comprising a raised zoator and an oil cooler assembly. Ru. FIG. 2 shows an enlarged top plan view of the engine compartment with the upper grill removed for simplicity, and FIGS. 3 and 4 are enlarged views of the rear front view of the engine compartment. The raised radiator and oil cooler assembly is shown in its lowered and raised positions. Figures 5 and 6 are lines 5-5 and 6-6 shown in Figure 2.
FIG. 7 is a sectional view taken substantially along the line 7--7 of FIG. 3 and viewed from the direction of the arrow. lO...Skid stayer loader-122...Elevating arm, 26...Upright member, 42...Engine, 44...
... Rear door, 48 ... Cooling device, 50 ... Fan, 52 ... Covering wall, 54 ... Cross beam member, 60 ... Swing type radiator and oil cooler assembly, 62 ...・Lower shelf, 64...Oil cooler, 80...Bracket, 86・
...Upper shelf, 88...Heat exchanger, 90.92...Header, 106...L-shaped rod, 110...Holding is fastening rod, 114...Holding is claw, 118...・Opening, 120...
・Handle, 122...The hook is a claw. Patent applicant: Owatona Manu 7 Acturing Company, Inc. I-Rated Patent Application Agent: Akira Aoki, Patent Attorney Kazuyuki Nishidate, Patent Attorney Yoshi 1) Masayuki Masayuki, Patent Attorney Akira Yamaguchi Patent Attorney Masaya Nishiyama

Claims (1)

[Scope of Claims] 1. Cooling of a hydraulically driven skid steer loader having a ventilated engine compartment surrounding the engine located behind the driver's cabin and between the upright members on both sides. The device comprises: a fan disposed between the engine and the driver's cabin; a covering wall enclosing the fan and extending from the air inlet to the air outlet; and a wall between the upright members on both sides. an upper and a lower radiator stacked above the outlet of the shroud; means for pivotally supporting the upper radiator for movement between an upper position and a lower position; A hydraulically driven skid stayer loader comprising: means for pivotally supporting rotational movement between lower positions; and means for releasably securing at least the upper radiator in at least the lower position. - cooling equipment. 2. In the cooling device according to claim 1, the means for pivotally supporting the upper radiator comprises a substantially rectangular frame having opposite ends, and a longitudinally spaced member at one end of the frame. a pair of lateral extension leg members mounted in positional relationship; means for pivotally coupling the extension leg member to one of the opposing upright members for pivotal movement about a generally longitudinal axis; A cooling device for a hydraulically driven skid stayer loader. 3. In the cooling device according to claim 1, the means for pivotally supporting the lower radiator comprises: a substantially rectangular frame having opposite ends; and a longitudinally spaced apart frame at one end of the frame. a pair of laterally extending leg members mounted in an aligned relationship; and means for pivotally coupling the extending leg members to one of the upright members for pivotal movement about a generally longitudinal axis; a protruding member coupled to the other opposite upright member for supporting the frame in a downward position; 4. A cooling device according to claim 1, wherein said means for releasably mounting at least said upper radiator in at least a downward position comprises a latch provided on a pivoting support member for said upper radiator. the seat has a metal plate which is selectively retainable in a notch formed in one of the upright members, and the latch further has an actuating rod coupled to the metal plate, the actuating rod being pivotally connected to the upper radiator. a folded end engageable between a position inserted into an opening in the dynamic support member and a position extended into an opening in one of the upright members for retaining the upper radiator in the upper position; A cooling system for the hydraulically driven skid and Dostiya loaders. 5. The cooling system of claim 1, wherein the hook for selectively interconnecting the upper and lower pivoting support members includes a pawl member. A cooling device according to claim 1, wherein a pair of first hoses are connected to the upper radiator to circulate the engine cooling medium, and a pair of second hoses are connected to the lower radiator. A cooling device for a hydraulic skin steer loader that connects hoses to circulate hydraulic fluid. 7. Skid stayer loader with a pair of upright members
A raised radiator assembly for use in an engine compartment includes a laterally extending shelf having a generally rectangular frame structure and one end of the shelf pivoting about a generally longitudinal axis between an upper position and a lower position. a radiator retained within said shelf; a protruding member mounted on the other upright for supporting said shelf in a downward position; A rotatable hook mounted on said shelf for the movement of lifting and releasing consists of a metal; and the seat comprises an actuating rod connected to the metal, said actuating rod being inserted into an opening formed in said shelf. A swing-up radiator assembly having a folded end engageable between an insertion position and an insertion position into an aperture formed in said one upright member for retaining the shelf in an upward position. 8.% The radiator assembly according to claim 7, further comprising: a second lateral bundle extending below the first shelf and having a substantially rectangular frame structure; means for pivotally coupling one end of the shelf to one upright member for pivotal movement about a generally longitudinal axis; and means coupled to the other upright member for supporting said second shelf in a downward position. a protruding member; a second air-to-liquid heat exchanger disposed on the second shelf; and a pawl member releasably coupling the second shelf to the first shelf in an upper position. Raised radiator. 9. The swing-up type radiator according to claim 7, further comprising a handle provided on the first shelf. 10. The raised radiator and oil cooler assembly installed between a pair of upright members in the engine compartment of a skid steer loader are each mounted on a lateral side formed by a substantially rectangular frame structure. an upper shelf and a lower shelf are arranged in a stacked relationship and include means coupled to one end of said upper shelf for pivotal movement about a first generally longitudinal axis between an upper position and a lower position, an oil cooler; is supported on the lower shelf, a protrusion is formed on the opposite upright to support the lower shelf in a downward position, and a latch is provided on the upper shelf to engage a notch formed on another upright. Disengagement movement is permitted, and the latch is coupled to an actuation rod having a closed position for engaging an opening in the upper shelf and an opening in the upright member for retaining the upper shelf in the upper position. A swing-up radiator and oil cooler assembly having bent ends movable between mating positions. 11. The assembly according to claim 10,
A swing-up radiator and oil cooler assembly, wherein a handle is attached to the upper shelf, and a catch is formed with a pawl member for holding the upper shelf in releasably interconnected relationship in the upper position.