DE1530476A1 - Vehicle with differential control by control column - Google Patents

Description

PATENTANWÄLTE Düsseldorf, 1 g OEZ 1968

DIPL-IHG. ERICH KOHNEMANN 32.66.02

DIPL.ING. KLAUS KOHNEMANN

4 DOSSEIDORF NORD, Freiligrathstr. 13th Tel. 482656 Poetedieddrto. «Cologne 79414

COAL INDUSTRY (PAOiENTS) LIMITED London, S.W. 1, G-rosvenor Place Hobart House

Vehicle with differential control by steering column

The invention relates to a vehicle with a choice of direction of travel Differential control for two hydraulic pumps operated by a single control column, which with hydraulic motors driving wheels or caterpillars on opposite sides of the vehicle in Connected.

There is already a hydraulic control device for conveyors known which is used for lifting, lowering, rotating, digging or loading the loading device of a loading machine will. Although the known teaching relates to the control of simple starting and stopping processes without any consideration The speed of these operations was limited, the need to control multiple drives by one

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New Ü .. uwi. ;. · "- ... Art. 7 Section 1, Paragraph 2, No. 1, Clause 3 of the Amendment Act. v. September 4 , 19671

single hand-operated and movable in all directions. Control pillar already recognized here.

Also known is a Druckflud control system, which in Tracked vehicles is used. With a single Control levers are used to steer, start up and stop the vehicle. When the With the control lever to the front, the clutches that are used for steering and power transmission are disengaged. Only in this one In the disengaged state, the translation of the force transmission device can be used changed and thus a speed of the vehicle can be selected. The speed selection as this, in turn, can only be carried out by another control lever, which is next to the one that can be moved in all directions Control lever must be present. The possibility of choosing only one single speed at a time and only if the couplings are separated, but is extremely cumbersome. Another disadvantage is the fact that the driver must operate a second hand control while keeping the control lever in its forward tilted position holds. It is therefore impossible for him to continuously control the speed of the vehicle.

Finally, a control shaft is also proposed for caterpillar vehicles been, which gur regulation of the steering, so to select the direction of travel, rotatable in both directions and to Regulation of the speed is movable in the longitudinal direction. The longitudinal movement of the shaft is not caused by direct Manual actuation causes, but by actuating a separate pedal plate, which in turn operates a spring and over this affects a device for automatic monitoring of the power transmission, its hydraulic servo system then causes the shaft to move in the longitudinal direction. As well as

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the choice of the vehicle speed due to non-direct manual operation of the shaft as well as the relative immobility this wave around its longitudinal axis have a disadvantageous effect «

For caterpillar vehicles to be used underground, such as the Invention preferably "relates to the following properties required:

1) The vehicle's control system must be as safe as possible.

2) The control system of the vehicle must be such that one hand of the operator remains free.

3) The control system of the vehicle must be as sensitive as possible and equally effective be for each direction of travel.

The invention is based on the object of creating a vehicle which meets these requirements.

The object is achieved according to the invention by a vehicle of the type mentioned at the outset, which is characterized by this is that the control column can be moved in a known manner in all directions without impairing its freedom of movement is connected to two pumps via a lever device, one group of parts of which when moving the steering column by hand from a neutral position in the longitudinal direction of the vehicle changes the outputs of the pumps equally and in the same direction in such a way that the size of the Deviation of the tax pillar from its neutral division Measure for the output of the pumps, and their second group of parts at the control column by hand

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to one side of the vehicle from its neutral position or from a longitudinal movement of the steering column of the vehicle resulting in the output of the pumps in opposite directions Sense changes in such a way that the amount of deviation of the sideways movement of the steering column from its neutral position or a measure of a position created by moving the steering column in the longitudinal direction of the vehicle for the outputs of the pumps.

This training is very beneficial. In contrast to the known objects, the object of the invention has a single control column that can be moved in all directions and is connected to the hydraulic pumps via rods, with their Help both the choice of direction of travel and depending on the amount of deviation of the steering column from its neutral position the size of the speed can be set and regulated. The control column influences this Two hydraulic pumps via the boom and regulates their output. This gives the driver the opportunity to to choose a speed at the same time as the direction of travel, which is small if the deviation of the Control lever from its neutral position is small, but which is large, even if the deviation of the control lever from its neutral position is great.

According to one embodiment of the invention it is provided that the lever device located between the control column and the pumps has a lever member serving as a backdrop, in which the rotary connection between this member and the Pumps moved by changing their distance from the rotatable mounting. Each pump can be used to control it

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use a lever arm ", which over the rotary connection is in connection with a sliding block which is longitudinally movable in a recess of the lever member. On the other hand, can each pump have a control connection cable with a rotary connection to the lever member, which is rotatable about a mounting bolt which in turn is slidable on a Shaft is attached.

An embodiment of the invention is shown in the drawing and is explained below. Show it:

Pig. 1 is a perspective, schematic view of the control device;

and 3 top views of a tracked vehicle, a section through the control column and its parts along the line A - A in Fig. 5, a section along the line B - B in Fig. 4, a view of the control column and its parts from below,

7 shows a partial section along the line C - C in FIG.

According to FIG. 1, a control column 1 is arranged in the driver's cab of a vehicle moved by means of endless caterpillars. The control column is mounted on a pivot 2, which is attached to a pivot bracket 3, the component a shaft 5 mounted in a housing block 4 and can rotate with it. On the one from the swivel console 3 remote end of the shaft 5, an arm 6 is attached, which by means of a sliding ball and a ball joint 8 with a Plate 7 is connected. A sliding block 9 is arranged in a longitudinal slot 9A provided in the plate 7 such that it can slide freely and. by means of a pin 14 and lever rods 15 and 16 to controls, not shown, for pumps A and B hinged.

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Fig. 2 Fig. 4th Fig. 5 Fig. 6th

With the sliding block 9 is through a ball joint arrangement, not shown a rod 10, which forms a unitary whole, is connected to a slide rod 11. The lower end the control column 1 is coupled to the end of the slide rod 11-, which the shaft 5 penetrates. The plate 7 is mounted on a holder 12 rotatable about a pin 13.

In the position shown in Fig. 1, is the Control column 1 in the neutral position, in which the flow from both pumps is zero.

When the control column 1 is adjusted in the direction of arrow R to the right, the slide rod 11 moves to the left and takes the sliding block 9 with it; here the control members on pumps A and B are adjusted in such a way that a pressure fluid flow caused by both pumps in a rearward direction. The greater the adjustment of the steering column is, the greater the influx of hydraulic fluid from the pumps.

When the control column 1 is moved to the left in the direction of arrow F, the slide rod 11 moves to the right and takes the sliding block 9 with it; here the control members on pumps A and B are adjusted so that a Pressurized fluid flow from both pumps is effected in a forward direction. As soon as the control column 1 on it across to the arrows R and F is adjusted, Dreh.die shaft taking the arm 6 and rotation of the plate 7 to the Trunnion 13. This causes the sliding block 9 »to move in the direction of the pump B (with the speed of the left caterpillar is increased) and to move by pump A (thereby reducing the speed of the right caterpillar will) so that the vehicle makes a forward turn to the right.

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Pig. 2 shows the vehicle at a viewed by the driver D to the right reclined steering column 1, wherein the arrow indicates the direction of movement of the vehicle al β consequence of this adjustment indicates the control column. The driver D is shown in his normal position assumed when driving, which shows him sitting transversely to the forward and backward direction of travel of the vehicle.

In FIG. 3, the control column 1 is adjusted to the left and in the direction of the driver D. The arrow gives the movement of the vehicle in a forward left curve.

The movement of the vehicle takes place in the direction in which the control column is moved; the speed in this direction, the adjustment of the control column from the neutral starting position is proportional.

Referring to Figures 4-7, there is the pressurized fluid control system from a control lever 1 (of which only a part is shown) which is mounted in a universal bearing 20 and has a ball seat 30 at its lower end. Of the Lever 1 can actuate a sliding device 40 through the ball seat 30 and pivot this about a pivot 50. The sliding device 40 can be operated by means of the lever 1 to pivot the pivot 50, which is in a Series of positions along the line between two rods 60 and 70 can be arranged. The linkages 60 and 70 are connected to cables 80 and 90 which are arranged in such a way that that the hydraulic fluid flow from two pumps to a motor pair (neither the pumps nor the motors are shown) due to a pivoting of the sliding device 40 changed can be.

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The arrangement of the lever 1 and .des bearing 20 allows pivoting movements of the lever 1 in each direction; the sliding device - * - Device 40 is arranged such that it experiences an adjustment corresponding to the adjustment of the lever 1. The sliding device 40 consists of pivot members 100, sliding members 110, bolts 120, a pivot arm 150 and one Console 130. The console 130 is slidable in groove-like recesses extending longitudinally in the pivot arm 150 140 arranged, wherein the pivot arm can pivot about the pivot. The pivot 50 is on the sliding links 110 articulated so that as soon as they are moved along a shaft 160, the pivot 50 is also adjusted is, whereby the relative positions of the pivot axis and the pivot arm 150 are adjusted. In this way two independent movements of the sliding device are allowed, namely first a pivoting movement of the sliding device 40 about the pivot 50 and secondly a sliding movement of the sliding members 110, the console 130 and the Trunnion 50 on shaft 160 plus any movement that is a combination of these two movements represents.

It should now be considered the first move and on Pig. 4, when the lever 1 is adjusted either to the right or to the left and the ball seat 30 at the end of the lever 1 rests against arms 170 of the pivot links 100, the pivot links and the entire sliding device AO being caused to move around the pivot 50 sway.

Once the slider 40 pivots, the linkages 60 and 70 move the cables 80 and 90 in either direction of the lever 1 dependent direction. The size of the

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Adjustment of the linkage 60 and 70 and therefore also the Cable 80 and 90 will be the same for each linkage and will also depend on the size of the adjustment of lever 1, whereby the flow rate of hydraulic fluid from the pumps in accordance with the adjustment of the lever is changed.

The second movement of the slider 40 is by pivoting of the lever 1 to its universal bearing 20 to the right or to the left, as in Pig. 5, causes. When the lever 1 is moved out of its neutral position (this neutral position is shown in the drawing shown) is the ball seat 30 against the sliding members 110 and moves this and the pivot along the shaft 160, whereby the position of the pivot axis is adjusted along the pivot arm 150.

Any other pivoting movement of the lever than the one mentioned above, ie a movement of the lever which is angled to the planes of the two movements mentioned above, has both a pivoting movement of the sliding device 40 about the pivot 50 as well as a sliding movement of the sliding device 40 in the longitudinal direction Swivel arm 150 to result. The sliding movement changes the position of the pivot axis, so that when the pivot arm is angularly adjusted, a different displacement of the rods 60 and 70 is caused. When the swivel axis ζ. B. is verntellt in the direction of the linkage 60, the linkage 70 will be subject to a greater displacement than the linkage 60 when an angular adjustment is initiated. The different displacement will depend on the distance by which the pivot axis is adjusted out of its neutral position. if

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the pivot axis is only moved by a small amount in the direction of the linkage 60, so the adjustment of the linkage 70 only slightly larger than that of the linkage 60. When the pivot axis to the limits of its distance is displaced from its neutral position, d. H. directly in the direction of the Anlenkpuiü one of the two rods 60 and 70, the linkage adjacent to the pivot axis remains stationary during the pivoting, while the other, with respect to the pivot axis remotely arranged linkage is capable of its greatest displacement. This position is the one in which when the control system is used in conjunction with a vehicle with powered endless caterpillars one caterpillar is working at maximum speed while the other caterpillar stands still. The degree of The caterpillar movement between this maximum and the rest position can be changed without limitation by adjusting the lever 1.

The lever 1 is, if it is angularly adjusted for the purpose of vehicle control, arranged such that it is after "Dead man" principle is actuated, in which, as a result of the actuation lever 1 being released, it is automatically activated returns to its neutral position, in which the hydraulic fluid supply to the motors' is interrupted. This interruption in the neutral position is achieved by providing a bypass valve 180, which is arranged so that it diverts pressure fluid from the pumps of the motors when the lever 1 is seated in a conical bracket 19ο has. To the hydraulic fluid To allow flow from the pumps to the motors, lever 1 must therefore first be lifted. Raising the Lever 1 displaces an outer tubular housing 200 axially with respect to an inner rod member 210 of the lever; the end part of the housing 200 is removed from its locking device

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handle with the conical holder 190 moved out. A resilient member 220 in the housing 200 which bears against the rod 210 can thereby be lowered move; this movement causes the bypass valve 180 to close.

When the lever is adjusted in order to steer the vehicle more than just control the vehicle speed, it is brought into the neutral position by means of piston cylinders 230 and 240 which are connected to a hydraulic collector (not shown). An adjustment of the lever 1 to the right or left, as shown Λ in Fig. 5, is counteracted by the pressure fluid in the piston cylinders 230 and 240, whereby a lever adjustment in the directions transverse to the directions mentioned above is easier to accomplish. In practice this means that it is easier to move the vehicle forwards and backwards than it is to make cornering movements.

The features disclosed in the above description, in the drawing and in the following patent claims the subject of the application can be used individually or in any combination for the realization the invention in its various embodiments f be essential.

Claims

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Claims (4)

Pat ent claims Vehicle with differential control for selecting the direction of travel by a single control column two hydraulic pumps, which with wheels located on opposite sides of the vehicle or Hydraulic motors driving caterpillars are connected, characterized in that the known per se Way in all directions movable control column (1) without impairing your freedom of movement two pumps (A, B) are connected via a lever device, one group of which is made up of parts (10, 11, 100, 170) when moving the control column (1) by hand from a neutral position in the longitudinal direction of the vehicle Outputs of the pumps (A, B) equally and in the same direction changes in such a way that the size of the deviation of the The control column (1) is a measure of the output of the pumps (A, B) from its neutral position, and the second group of parts (2, 3, 5, 6, 7, 8, 9, 110) at the control column (1) by hand to one side of the vehicle from its neutral position or from a movement of the control column (1) in the longitudinal direction of the vehicle resulting position out the discharges of the pumps (A, B) in opposite directions in such a way that changes the size of the deviation of the sideways movement of the control column (1) from its neutral position or from a position created by moving the control column (1) in the longitudinal direction of the vehicle represents a measure for the output of the pumps (A, B). 909829/0859 Nc.-, v. ·. ,,, r; .7 ^% i1 /.-- 5.2 ' ^: r .: l - :. tz 3 £.: <i, Vr> .. j _; . .. 4. 9. IÖ67J 2. Vehicle according to claim 1, characterized in that the between the control column (1) and the pumps (A, B) located lever device has a lever member (7, 150) serving as a backdrop, in which the rotary connection is located (14, 60) between this member (7, 150) and the pumps (A, B) while changing their distance moved by the rotatable mount (13, 50). 3. Vehicle according to claim 2, characterized in that each pump (A, B) has a lever arm (15, 16) for its control, which via the rotary connection (14) with one in a recess (9a) of the lever member (7) longitudinally movable sliding block (9) is in connection. 4. Vehicle according to claim 2, characterized in that each pump (A, B) a control connection cable (80, 90) with a rotary connection (60, 70) to the lever member (150) which is rotatable about a fastening bolt (50), which in turn is slidable on a shaft (160) is appropriate. 909829/0859 BATH ORIGINAL / IH Blank page