Industrial truck with optical lifting height measurement
First Claim
1. An industrial truck, comprising:
- a vehicle frame;
a first lifting frame that is attached to the vehicle frame;
a second lifting frame that is movable in the vertical direction relative to the first lifting frame, the second lifting frame being guided on the first lifting frame;
a third lifting frame that is moveable in the vertical direction relative to the first lifting frame, the third lifting frame being guided on the second lifting frame, wherein movement of third lifting frame is coupled to movement of the second lifting frame such that the second lifting frame and the third lifting frame move simultaneously with a transmission ratio;
a driver'"'"'s cab that is moveable in the vertical direction relative to the third lifting frame, the driver'"'"'s cab being guided on the third lifting frame; and
a measuring arrangement comprising;
a first optical sensor that is fastened to the first lifting frame, directed toward a surface of the second lifting frame, and configured to contactlessly detect movement of the second lifting frame relative to the first lifting frame by sensing a coincidental surface design of the surface of the second lifting frame; and
a second optical sensor that is arranged on the driver'"'"'s cab, directed toward a surface of the third lifting frame, and configured to contactlessly detect movement of the driver'"'"'s cab relative to the third lifting frame by sensing a coincidental surface design of the surface of the third lifting frame;
wherein the measuring arrangement is configured to determine the lifting height of the driver'"'"'s cab by adding up the movement of the second lifting frame relative to the first lifting frame detected by the first optical sensor, the movement of the driver'"'"'s cab relative to the third lifting frame detected by the second optical sensor, and the movement of the third lifting frame relative to the first lifting frame on account of the movement of the third lifting frame being coupled to the movement of the second lifting frame.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to an industrial truck, comprising a vehicle frame, a lifting framework (14), the lifting framework (14) having a first lifting frame (20) which is attached to the vehicle frame, and at least one lifting arrangement (22, 24) which is movable in the vertical direction (V) relative to the first lifting frame (20), and a measuring arrangement (32, 38, 40) which is provided in order to detect a movement of the first lifting frame (20) and/or of the lifting arrangement (22, 24) relative to the vehicle frame. In this case, it is provided according to the invention that the measuring arrangement comprises at least one optical sensor (32) by means of which the movement of the first lifting frame (20) and/or of the lifting arrangement (22, 24) can be sensed contactlessly. Furthermore, the invention proposes a method for determining the lifting height in a lifting framework of an industrial truck, with the distance covered by the first lifting frame (20) and/or by the lifting arrangement (22, 24) being detected by sensing of a surface (36) of the first lifting frame (20) or of the lifting arrangement (22, 24) by means of an associated optical sensor (32).
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Citations
20 Claims
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1. An industrial truck, comprising:
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a vehicle frame; a first lifting frame that is attached to the vehicle frame; a second lifting frame that is movable in the vertical direction relative to the first lifting frame, the second lifting frame being guided on the first lifting frame; a third lifting frame that is moveable in the vertical direction relative to the first lifting frame, the third lifting frame being guided on the second lifting frame, wherein movement of third lifting frame is coupled to movement of the second lifting frame such that the second lifting frame and the third lifting frame move simultaneously with a transmission ratio; a driver'"'"'s cab that is moveable in the vertical direction relative to the third lifting frame, the driver'"'"'s cab being guided on the third lifting frame; and a measuring arrangement comprising; a first optical sensor that is fastened to the first lifting frame, directed toward a surface of the second lifting frame, and configured to contactlessly detect movement of the second lifting frame relative to the first lifting frame by sensing a coincidental surface design of the surface of the second lifting frame; and a second optical sensor that is arranged on the driver'"'"'s cab, directed toward a surface of the third lifting frame, and configured to contactlessly detect movement of the driver'"'"'s cab relative to the third lifting frame by sensing a coincidental surface design of the surface of the third lifting frame; wherein the measuring arrangement is configured to determine the lifting height of the driver'"'"'s cab by adding up the movement of the second lifting frame relative to the first lifting frame detected by the first optical sensor, the movement of the driver'"'"'s cab relative to the third lifting frame detected by the second optical sensor, and the movement of the third lifting frame relative to the first lifting frame on account of the movement of the third lifting frame being coupled to the movement of the second lifting frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An industrial truck, comprising:
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a vehicle frame; a first lifting frame that is attached to the vehicle frame; a second lifting frame that is movable in the vertical direction relative to the first lifting frame, wherein the second lifting frame is capable of being displaced telescopically in the vertical direction with respect to the first lifting frame and is guided on the first lifting frame; and a third lifting frame that is moveable in the vertical direction relative to the first lifting frame, wherein the third lifting frame is guided on the second lifting frame, wherein movement of third lifting frame is coupled to movement of the second lifting frame such that the second lifting frame and the third lifting frame move simultaneously with a transmission ratio; a driver'"'"'s cab that is moveable in the vertical direction relative to the third lifting frame, the driver'"'"'s cab being guided on the third lifting frame; and a measuring arrangement comprising; a first optical sensor that is fastened to one of the first lifting frame and the second lifting frame, directed toward a surface of the other of the first lifting frame and the second lifting frame, and configured to contactlessly detect relative movement of the first lifting frame and the second lifting frame; and a second optical sensor that is arranged on one of the driver'"'"'s cab and the third lifting frame, directed toward a surface of the other of the driver'"'"'s cab and third lifting frame, and configured to contactlessly detect relative movement of the driver'"'"'s cab and the third lifting frame; wherein the measuring arrangement is configured to determine the lifting height of the driver'"'"'s cab by adding up the relative movement of the first lifting frame and the second lifting frame detected by the first optical sensor, the relative movement of the driver'"'"'s cab and the third lifting frame detected by the second optical sensor, and the relative movement of the first lifting frame and third lifting frame on account of the movement of the third lifting frame being coupled to the movement of the second lifting frame. - View Dependent Claims (16, 17, 18)
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19. A method for determining the lifting height of a driver'"'"'s cab in an industrial truck, the method comprising:
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contactlessly detecting, by a first optical sensor fastened to one of a first lifting frame and a second lifting frame and directed to the other of the first lifting frame and second lifting frame, a relative movement of the first lifting frame and the second lifting frame, wherein the first lifting frame is attached to a vehicle frame, the second lifting frame is movable in the vertical direction relative to the first lifting frame, and the second lifting frame is guided on the first lifting frame; contactlessly detecting, by a second optical sensor arranged on one of the driver'"'"'s cab and a third lifting frame and directed to the other of the driver'"'"'s cab and the third lifting frame, relative movement of the driver'"'"'s cab and the third lifting frame, wherein the third lifting frame is moveable in the vertical direction relative to the first lifting frame, the third lifting frame is guided on the second lifting frame, movement of third lifting frame is coupled to movement of the second lifting frame such that the second lifting frame and the third lifting frame move simultaneously with a transmission ratio, the driver'"'"'s cab is moveable in the vertical direction relative to the third lifting frame, and the driver'"'"'s cab is guided on the third lifting frame; and determining, by a measuring arrangement comprising the first and second optical sensors, the lifting height of the driver'"'"'s cab by adding up the relative movement of the first lifting frame and the second lifting frame detected by the first optical sensor, the relative movement of the driver'"'"'s cab and the third lifting frame detected by the second optical sensor, and the relative movement of the first lifting frame and third lifting frame on account of the movement of the third lifting frame being coupled to the movement of the second lifting frame. - View Dependent Claims (20)
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Specification