EP0909855A2 - Loader vehicle - Google Patents

Abstract

Two lifting arms (12) extend adjacent to side parts of a frame structure (16) and have connections at the rear via link members (30) to the upper part of post members (34) extending upwards from frame side parts between the lifting arms. Joint structures (66) are located in the upper part of the post members, on which the driver's cell enclosure (14) can pivot between an operating position and a position in which it is raised and moved to the rear.

Description

The invention relates to a loader vehicle with a frame structure, the transversely spaced frame side parts contains. A lifting device of the loader vehicle has two extending in the vehicle longitudinal direction near the frame side parts Lift arms on. Extend from the frame side parts upward two transversely spaced between the Lifting arms with spaced post elements. Handlebar elements connect a respective rear area of the Lift arms with an upper area of the respective post element. Essentially in front of and between the post elements a driver's compartment trim is arranged. Such a thing Loader vehicle is known from US-A-5,609,464.

Skid Steer Loaders or Skid Steer Loaders are small machines with hydraulic drives Lift arms that are articulated at their front ends carry mountable shovels or other work tools. Of the middle area of the loader carries a driver platform or cabin.

Under the driver's cab are loader components, such as a hydrostatic transmission, steering linkage, hydraulic lines and Valves for driving the lifting arms, buckets and additional functions, Hydraulic lines for the wheel motor drives and various electrical wiring harnesses and connections, housed. In order for maintenance and other service work To allow access to these loader components the driver's cab is moved away. For this, the Driver's cabin moved forward or forward (US-A-5,551,826) or tilted back (US-A-4,811,983).

As the lifting arms of the skid steer loader extend along its side extend, they can access the components from the side block. Front access is therefore often preferred. However, if it is a loader where the Driver's cab can be moved forward or tilted forward, access from the front is excluded, so that the lifting arms need to be raised to gain access from the side of the To enable the loader. If the loader hydraulics, however the lifting arms are not easy to operate lift so that access to the components becomes difficult. To overcome this problem, some skid-steer loaders exhibit a driver's cab that can be tilted backwards.

It is often desirable to have skid-steer loaders with lift arms equip that lift vertically so that the vertical height the bucket and its forward reach are maximized can and it is easier to load the shovel into a truck to empty. With such a skid steer loader, both are front as well as the rear ends of the lifting arms in such a way determined that the blade would move along an essentially vertical path. To make a vertical movement of the To facilitate lifting arms, the rear areas are articulated connected to handlebars that lift the rear vertically Allow ends of the lift arms. These handlebars are on sometimes frame structure of the loader standing vertically upwards attached to increase the vertical reach of the arms. Since the handlebars also allow the arms to pivot, the arms can move forward when lifting what the ability to carry loads across the side of a truck in these to drain, improved.

If upward frame structures both the lift arms as well as have to carry the loading shovel and its load they are reinforced with one or more cross beams become. Furthermore, the lifting arms carrying the lifting arms are often with one or more transversely extending cross members stiffened. The cross members mentioned can, however, when pivoting represent an obstacle to the driver's cab to the rear and the extent to which it pivots up and back is possible to limit significantly. As a result, the available work area under the raised back Driver's cabin, which is used for maintenance and repair work on the Vehicle components are available to be limited.

The object underlying the invention is seen in to train a generic loader vehicle such that the problems mentioned at the beginning are overcome. In particular is it is desirable to have a skid-steer loader with a cab to have that pivot up and back allows for adequate and convenient access to the Vehicle components from the front of the vehicle to provide. This is particularly desirable if the loader vehicle connecting elements between its frame structure and rear areas of the lifting arm, the one Allow the lifting arms to be lifted vertically. It is further desirable support post for fastening the lifting arm connecting elements to provide that allow the Raise the lift arms beyond the loader frame, their vertical Height and range forward is maximized, so that Tip material into the side of a truck leaves. It is also desirable to have a stiffening component to provide, through which the lifting arms and posts stabilized be and what the use of less expensive trained support structures for the posts. It is further desirable to hang the driver's cab so that its bottom and rear area extend over the access of the Let the work area move up and not through Cross elements hindered in their upward and backward movement or be limited. Furthermore, it is desirable that Parts of the driver's cabin, in particular the size of its frame parts, to keep it as small as possible. It is also desirable Provide power means that raise the cab support and work even when the hydraulic or electrical power system should collapse. It would also be beneficial to have a releasable lock Allow the driver's cab in its raised position.

The object is achieved by the teaching of the claim 1 solved. Further advantageous configurations and Further developments of the invention result from the subclaims forth.

According to the invention, a skid-steer loader has a vertical one lifting device with two lifting arms and one Driver's compartment trim, in particular a driver's cabin, which can then be swiveled up and back, when the hydraulics and electrics of the loader are complete fails.

The rear of the driver's cab is at the top End of an upright structural member, especially one Support post, articulated so that there is a high pivot point for the upward pivoting of the driver's cab and the Posts during the pivoting as supporting frame parts for serve the driver's cabin. The joint structures are at the top, attached rear area of the driver's cabin, so that when Swinging up the floor and the rear area of the Driver cabin essentially lifted off the loader components and a sufficient work area for Expose service work. The lifting link, which is vertical Allow lifting of the lifting arms are also on the support posts articulated in such a way that their vertical lifting height and forward reach maximized and construction simplified becomes. Between the posts and the ends of the link arms or the ends of the lifting arms is a stiffening cross member arranged, which stabilizes the posts and lifting arms, so that the required post thickness can be minimized.

The articulated structures of the driver's cabin are nearby and something in front of the cross member so that a collision between Driver's cab and cross member is avoided if the Driver's cabin for access to vehicle components is pivoted above and behind. The cross member and the Articulated structures for the driver's cab and the Articulated connections for the lifting links are nearby the top of the support posts. This results in a improved rear view. It's gas cylinders that do that Raising the driver's cab support, and detachable Locking mechanisms for a secure hold of the Driver's cab in its raised, raised position, intended.

Using the drawing, which is an embodiment of the invention shows, the invention and further advantages are below and advantageous developments and refinements of Invention described and explained in more detail.

Fig. 1

eine perspektivische Vorderansicht eines Skid-Steer-Loaders mit einer verschwenkbaren Fahrerraumverkleidung in Betriebsstellung,

Fig. 2

eine perspektivische Hinteransicht eines Skid-Steer-Loaders mit der Fahrerraumverkleidung in Betriebsstellung,

Fig. 3

eine perspektivische Ansicht von rechts, vorn eines Skid-Steer-Loaders mit einer Fahrerraumverkleidung in angehobener Stellung,

Fig. 4

eine schematische Seitenansicht eines Laders mit angehobener Fahrerraumverkleidung, wobei die Betriebsstellung der Fahrerraumverkleidung durch gestrichelte Linien angedeutet ist,

Fig. 5

eine vergrößerte perspektivische Ansicht von oben, hinten, links der Gelenkanordnung, welche die Fahrerraumverkleidung verschwenkbar trägt, und deren oberen Hublenkerteile mit Lader-Pfosten,

Fig. 6

eine Schnittansicht entlang der in Fig. 5 dargestellten Linie 6-6,

Fig. 7

eine vergrößerte schematische perspektivische Ansicht der Steuerhebel und ihrer die Exzenterscheiben beeinflussenden Traggestänge,

Fig. 8

eine schematische Seitenansicht eines Gaszylinders in seiner eingefahrenen Stellung,

Fig. 9

eine schematische Seitenansicht des Gaszylinders in seiner ausgefahrenen und verriegelten Stellung und

Fig. 10

eine vergrößerte perspektivische Ansicht von oben, links, hinten der Befestigungsstruktur, die verwendet wird, um die Fahrerraumverkleidung während des Laderbetriebs auf dem Fahrzeugrahmen zu arretieren.

It shows:

Fig. 1

1 shows a perspective front view of a skid steer loader with a pivotable driver's compartment lining in the operating position,

Fig. 2

2 shows a perspective rear view of a skid steer loader with the driver's compartment lining in the operating position,

Fig. 3

3 shows a perspective view from the right, in the front, of a skid steer loader with a driver's compartment lining in a raised position,

Fig. 4

2 shows a schematic side view of a loader with the driver's compartment lining raised, the operating position of the passenger compartment lining being indicated by broken lines,

Fig. 5

3 shows an enlarged perspective view from above, behind, to the left of the joint arrangement, which pivotably supports the driver's compartment lining, and its upper link parts with loader posts,

Fig. 6

5 shows a sectional view along the line 6-6 shown in FIG. 5,

Fig. 7

FIG. 2 shows an enlarged schematic perspective view of the control levers and their support rods that influence the eccentric discs,

Fig. 8

2 shows a schematic side view of a gas cylinder in its retracted position,

Fig. 9

is a schematic side view of the gas cylinder in its extended and locked position and

Fig. 10

an enlarged perspective view from above, left, rear of the fastening structure, which is used to lock the driver's compartment panel during loading operation on the vehicle frame.

Figures 1, 2 and 3 illustrate a skid steer loader 10, also called skid steer loader or skid steer loader, with vertical lifting arms 12 and a pivotable to the rear Driver's compartment trim 14, which also functions as a complete driver's cabin could be trained. On the vehicle frame 16 are in rear vehicle area suspended engine 18 and front and Rear wheels 20, 22 attached. As with skid steer loaders Usually, the rear wheels 22 can be used independently drive. They are through with their associated front wheels 20 Chain drives, not shown, coupled. The driver's compartment trim 14 is in the middle, between the lifting arms 12 worn area.

The lifting arms 12 are designed so that they are on their front End loading shovels or similar tools can accommodate. Their attachment to the frame 16 leaves one essentially vertical lifting too. To enable such a movement is each of the two lifting arms 12 on a first Hublenkerelement 26, which is between a middle Area of the frame 16 and a lower, rear area 28 of the lifting arm 12 extends, pivotally attached. Second, upper link elements 30 are arcuate. she connect the upper, rear area 32 of the associated lifting arm 12 with one of the upright left or right post 34 in the rear of the vehicle frame 16 are attached and protrude from this upwards. Between the vehicle frame 16 and each lifting arm 12 is a Hydraulic cylinder 36 for lifting and lowering the lifting arm 12 arranged.

The driver's compartment trim 14, which is best seen in FIGS. 1 to 4 shows a base 38, also basic structure called, which essentially have a floor 40 with integrated Side and rear walls 42, 44, tubular side parts 46, which protrude from the side walls 42 and up to the Post 34 extend a roof 48 with one forward protruding tubular frame 50 and side guards 52 has. The upright post 34 in the rear of the Loaders 10 form an additional rollover support structure for the driver's compartment trim 14. The driver's compartment trim 14 further includes a seat 54 secured to the base 38 and various measuring instruments. In the area of the front edge the driver's compartment trim 14 protrude from the vehicle frame 16 a control lever 56, 58 for the left and the right Wheels up. Fasteners in the form of screws 60 and nuts 61 (see Figures 3 and 10) secure each side of the Hold the passenger compartment trim 14 on the vehicle frame 16 and in their operational position.

Figures 3 and 4 show the loader 10 with a Cab trim 14, located in its upper, rearward pivoted position and thus access to offers various charger components housed under it. The components are, for example, a hydrostatic transmission 62, steering linkage, which the Control levers 56, 58 with the hydrostatic transmission 62 connect, hydraulic valves 64 with connected lines for driving the lifting arms 12, the loading shovel 24 and additional loader functions, hydraulic lines for the Wheel motor drives and various electrical wiring harnesses and Links.

As can be seen from FIGS. 3, 4 and 5, the Driver's compartment trim 14 on left and right joint structures 66 carried by the upper ends of the posts 34 attached so that they pivot up and back leaves. Each hinge structure 66 includes a lifting eye 68 that attaches to one of the tubular side parts 46 is attached and from protrude this backwards. By screws 70 are the Support eyelets 68 between the inner wall 72 and the outer wall 74 of the respective post 34 held. Each screw 70 has a thread at one end. The nuts are Screws 70 on the inner walls 72 and the outer walls 74 the post 34 secured.

A reinforcement cross member 78 (see FIG. 5) extends between the upper ends of the posts 34 just behind the Articulated structures 66. According to a preferred embodiment, it has a substantially C-shaped profile on which a cover 79 is attached. The opposite ends of the reinforcement cross member 78 abut the inner walls 72 of the posts 34 and are welded to them at 80 (see FIG. 6). Of the Reinforcement cross member 78 not only stiffens the posts 34 but also stabilizes the upper ends of the handlebar elements 30 and makes cross beams between the top ends of the Handlebar elements 30 superfluous.

Through articulated connections 82, the upper ends of the Handlebar elements 30 pivotally connected to the posts 34. How it is best seen from Figures 5 and 6, these exist Connections 82 from first eyes 84 that are at the upper ends of the handlebar elements 30 are attached, second eyes 86, which the upper ends of the posts 34 are attached, conical Handlebar pins 88 that are inserted through the first eyes 84 and sit in the second eyes 86, and screws 90 that used the handlebar pins 88 in the second eye 86 to secure. The screws 90 are used for this purpose in Internal thread 92 that is in the bore of every second eye 86 are trained, screwed. The top end of the Handlebar elements 30 articulated to the posts 34.

With the reinforcement cross member 78, the hinge structure 66 and the articulated connections 82, which are all near the Summit points of the posts 34 can be used for the driver's compartment trim 14 a large rear window is provided, which improves the rear view.

In operation, the charger 10 is used in the same way as similar ones known loader equipped with vertical lifting arms 12 are, d. that is, it is possible to pick up and move material Empty disposal from one side into a truck. If there are 10 mechanical problems with the loader or Maintenance work will be necessary that has access to Vehicle components, which are under the driver's compartment trim lie, require, so the operator can easily Point the cab trim up and back in Fig. 3 pivot position.

In order to pivot the driver's cabin panel 14 upwards, the operator dismount from the loader 10 and the nuts Loosen 61 from screws 60 attached to vehicle frame 16. Then the operator can be viewed from the front of the loader 10 from the side walls 42 of the driver's compartment trim 14 lift. Gas cylinders 94, which are on both, expand Sides of the driver's compartment trim 14 are made of and assist in lifting the cabin trim panel 14 around the hinge structures 66 supported on the posts 34 upwards and is pivoted behind. When lifting the driver's cabin paneling 14, the control levers 56, 58 forward moved to 14 for the floor of the driver's compartment trim to create the required space when swiveling. The Shifting movement of the control lever 56, 58 is by the Interaction between the base of the floor 40 and the Eccentric discs 96 on the rotary shafts 98 of the control levers 56, 58 are attached. This characteristic is the subject a European patent application with priority US 953,560 of October 17, 1997, the disclosure of which is hereby incorporated by reference is taken to avoid repetitions.

When the cabin trim 14 is in its highest position (see Fig. 3) is raised, locking means, which are arranged on at least one of the gas cylinders 94, be operated to the driver's compartment trim 14 in their wear raised position. The locking means are in the Relation to a gas cylinder 94 in FIGS. 8 and 9 shown in more detail. They contain a bottom at the bottom Sleeve 102 has a seat surface 100 which is striving for Gas cylinder rod 104 including an angle to the lower one Wear sleeve 102. If the gas cylinder 94 from its in Fig. 8 retracted position shown in the Fig. 9 Is extended position, the seat 100 urges the lower Sleeve 102 from its aligned with an upper sleeve 106 Location. When the gas cylinder 94 is fully extended, it pivots the lower sleeve 102 in the position shown in Fig. 9, in the the upper edge 108 of the lower sleeve 102 under the lower edge 110 of the upper sleeve 106 pushes. With each other offset cylinder sleeves 102, 106, their corresponding edges 108, 110 collide, as shown in FIG. 9, the Gas cylinder 94 can not be retracted, but is in this Locked position and holds the cab trim 14 in their position. It has been shown that is sufficient, only one locking cylinder for the loader model ECV4SC500555S4D from Camloc (UK) Ltd., Fairchild Fastener Group to use.

With the driver's compartment trim 14 raised, a easy access to the front of the loader Loader components under the cab trim are accommodated. If not electrical and / or hydraulic There is a fault that prevents the lifting arms 12 from lifting additionally also access from the side of the loader 10 possible.

After performing maintenance and repair work, the cab trim 14 in a simple manner in their Bring operating position back and lock. To put them in the Returning the operating position are the locking means of the gas cylinder 94 released from their engagement, so that the gas cylinder 94 can contract. this will achieved by the lower cylinder sleeve 102 against the Prestressing the seat surface 100 inwards to the cylinder rod 104 is pressed so that the lower sleeve 102 with the upper Sleeve 106 is aligned. As soon as the sleeves 102, 106 are aligned, the cabin trim 14 pressed down, the Retract gas cylinder 94. When swiveling the Driver compartment trim 14 around their hinged to the post 34 Joint structures 66, the floor 40 comes into contact with the Eccentric discs 96 so that the control levers 56, 58 in their pivot upright position, as shown in Fig. 1. Simultaneously with the driver's compartment trim 14, the Side parts 46 attached L-shaped bracket 112 after pivoted below so that the screws 60 by associated Openings 114 are guided in the brackets 112. Now the nuts 61 can be screwed onto the screws 60, whereby the cabin trim 14 on the vehicle frame 16 secured and an upward movement of the cabin lining 14 is prevented during the operation of the loader 10. On the Screws 60 are attached to elastic supports 116 which a damped relative movement between the driver's compartment trim 14 and the vehicle frame 16 enable.

With the swiveling up and back Driver compartment trim 14 provides access to vehicle components relieved from the front of the loader 10. This can be particularly desirable if the Loader 10 a full electric or hydraulic System failure occurs, which makes it impossible for the lifting arms 12 easy to lift or remove so that a Access from the side of the loader 10 would be possible.

Since the joint structures for the driver's compartment trim 14 and the lifting arms are mounted very high on the usual support posts are, the lifting arms 12 reach very high and after lifting front so that loads are emptied across the side of trucks can be. It can also be used to cover the driver's compartment 14 raised far above the loader components as well the rear view can be improved. Compared to previous ones Vehicles is a smaller number of less elaborate Components required for the manufacture of the loader.

Even if the invention is based only on one Embodiment has been described, open up for the expert in the light of the above description and the Drawing many different alternatives, modifications and variants which fall under the present invention.

Claims (11)

Loader vehicle with a frame structure (16) which contains frame side parts spaced transversely to one another, with a lifting device which has two lifting arms (12) extending in the longitudinal direction of the vehicle near the frame side parts, with a pair of upright, transversely spaced post elements (34) extending from the frame side parts and lying between the lifting arms (12), with handlebar elements (30) which articulate a respective rear area (32) of the lifting arms (12) with an upper area of the respective post element (34), and with a driver's compartment lining (14) which is arranged essentially in front of and between the post elements (34), characterized in that articulated structures (66) are arranged in the upper region of the post elements (34), on which the driver's compartment covering (14) is pivotably attached in such a way that it can be pivoted between a first operating position and a second position raised upwards and backwards. Loader vehicle according to claim 1, characterized in that themselves between the top areas of the two Post elements (34) at least one cross member (66) extends, and that the hinge structures (66) nearby of the cross member are arranged. Loader vehicle according to claim 2, characterized in that the driver's compartment trim (14) is adapted such that between the post elements (34) and can be pivoted at the rear over the crossmember (66). Loader vehicle according to one of claims 1 to 3, characterized characterized in that the post elements (34) as rear load-bearing components for the driver's compartment lining (14) serve if they are in their operating position located. Loader vehicle according to one of claims 1 to 4, characterized characterized in that the driver's compartment trim (14) is a back wall extending essentially vertically (44) contains and that the joint structures (66) in Area of the upper corner of the rear wall (44). Loader vehicle according to one of claims 1 to 5, characterized characterized in that at least two laterally to each other spaced gas cylinders (94) are provided which are between the frame structure and the Extend the driver's compartment trim (14) and that Swiveling up the driver's compartment trim (14) supports, and that at least one gas cylinder (94) releasable locking means for securing the gas cylinder (94) in its extended position. Loader vehicle according to one of claims 1 to 6, characterized characterized in that the driver's compartment trim (14) is at the rear and areas adjacent at the top (68) on which the Attack joint structures (66). Loader vehicle according to one of claims 1 to 7, characterized characterized in that the articulated connections (82) for the Handlebar elements (30) near the upper ends of the Post elements (34) are arranged. Loader vehicle according to one of claims 1 to 8, characterized characterized in that the post elements (34) of the vehicle longitudinal direction middle areas of the Frame side parts are worn. Loader vehicle according to one of claims 1 to 9, characterized characterized in that the link elements (30) are closely adjacent to the joint structures (66) articulated to the Post elements (34) are attached. Loader vehicle according to one of claims 1 to 10, characterized characterized in that the joint structures (66), the Cross members (78) and the articulated connections (82) all in the respective upper end areas of the post elements (34) are attached.

Images