Lock mechanism of restricting plate of road paving machine
A compact locking device with multiple locking positions for pivotable components in road paving machines addresses the need for reliable adjustment and prevention of excess material spread, enhancing operational efficiency and reliability.
Patent Information
- Application Number
- JP2024161268
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-09-19
- Filing Date
- 2024-09-18
- Publication Date
- 2025-04-01
AI Technical Summary
Existing road paving machines lack a compact and reliable locking mechanism for pivotable components, such as restriction plates, which are crucial for adjusting the operating width and preventing excess paving material from spreading.
A compact and reliable locking device is introduced for pivotable components in road paving machines. This device includes a latch system with multiple locking positions, allowing the restriction plate to be securely locked in various positions, thereby preventing unintended rotation.
The locking mechanism ensures that the restriction plate is securely positioned, allowing for precise control over the operating width of the screed and preventing excess material from spreading, thus enhancing the operational reliability and efficiency of road paving machines.
Smart Images
Figure 2025044186000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to the technical field of road pavers, in particular to a road paving machine with a limiting plate assembly, the kinematics of such a limiting plate assembly and a method for pivoting the limiting plate of a road paving machine.
[0002] Road pavers are well known from the prior art. To improve the usability of road pavers, variable screeds have been designed with respect to their working width. The working width is the width over which the screed spreads the paving material on the road surface. For example, EP 2 169 117 A1 discloses a screed with a continuously variable working width. The paving material is spread transversely to the paving direction of the road paver by a spreading screw in front of the screed.
[0003] Adjusting the working width of the screed also changes the width of the paving material spread. To avoid excess paving material being spread in the paving direction, the width of the limiting plate assembly must optionally also be adjusted to the working width. This can be done, for example, by using laterally pivotable plates on the outside of the limiting plate assembly.
[0004] A limiting plate assembly for a road paver with a swivellable limiting plate is known from EP 3 988 714. The limiting plate is swivelled and held in position by a hydraulic swivelling device. Summary of the Invention [Problem to be solved by the invention]
[0005] SUMMARY OF THE DISCLOSURE The object of the present invention is to provide a compact and reliable locking device for swivellable components of a road paving machine, in particular for swivellable limiting plates. [Means for solving the problem]
[0006] This problem is solved by a limiting plate assembly according to claim 1, a locking mechanism according to claim 12 or a method for pivoting a limiting plate according to claim 15.
[0007] A first aspect of the present invention relates to a limiting plate assembly of a road paver. The limiting plate assembly comprises a limiting plate and a swiveling device. The limiting plate assembly may further comprise a limiting plate. The limiting plate is attached to a component of the road paver, in particular to a component of the limiting plate assembly, via the swiveling device. The limiting plate is rotatable around the swiveling device. The swiveling device is capable of rotating the limiting plate around a vertical axis. The limiting plate is capable of swiveling in a horizontal direction. The limiting plate is rotatable between a minimum limiting plate position and a maximum limiting plate position.
[0008] The limiting plate assembly may further include a locking device adapted to select between a first locking position and a second locking position, in the first locking position, the locking device adapted to prevent rotation of the limiting plate about the rotating device in the direction of the minimum limiting plate position when the limiting plate is in the first limiting plate position, and in the second locking position, the locking device adapted to prevent rotation of the limiting plate about the rotating device in the direction of the maximum limiting plate position when the limiting plate is in the second limiting plate position.
[0009] The width of the limiting plate assembly can be varied by rotating the limiting plate. The minimum limiting plate position can correspond to a minimum width of the limiting plate assembly. The maximum limiting plate position can correspond to a maximum width of the limiting plate assembly. In the minimum limiting plate position, the limiting plate can abut against the road paver. In the maximum limiting plate position, the limiting plate can protrude from the road paver, in particular in the perpendicular direction thereto.
[0010] The road paver moves in a paving direction during paving of the paving material. In a minimum plate position, the plate may extend parallel to the paving direction. The rotating device may be arranged at a front end of the plate with respect to the paving direction. In a minimum plate position, the plate may be pivoted backwards with respect to the paving direction. In a maximum plate position, the plate may extend perpendicular to the paving direction.
[0011] The first plate position may be closer to the maximum plate position than the second plate position. The first plate position may correspond to the maximum plate position. The second plate position may correspond to the minimum plate position or a plate position between the minimum and maximum plate positions.
[0012] The first locking position of the locking device may be different from the second locking position.
[0013] The locking device may be adapted to, in the first locking position, fix the limiting plate in a first limiting plate position, in particular in a maximum limiting plate position.
[0014] The locking device may be adapted to fix the limiting plate in particular in a minimum limiting plate position in the second locking position.
[0015] The locking device may be adapted to select a third locking position, in which the locking device may be adapted to prevent rotation of the limiting plate about the rotating device in the direction of the maximum limiting plate position when the limiting plate is in the third limiting plate position.
[0016] The second limiting plate position may be located between the minimum limiting plate position and the maximum limiting plate position. The second limiting plate position may be located between the first limiting plate position and the third limiting plate position. The first limiting plate position may correspond to the maximum limiting plate position. The third limiting plate position may correspond to the minimum limiting plate position.
[0017] The locking device may be adapted to fix the limiting plate in particular in a minimum limiting plate position in the third locking position.
[0018] The locking device may be adapted, in the second locked position, to prevent rotation of the limiting plate about the rotating device in the direction of the minimum limiting plate position when the limiting plate is in the fourth limiting plate position.
[0019] The fourth limiting plate position may be between the second limiting plate position and the third limiting plate position. The fourth limiting plate position may correspond to the third limiting plate position.
[0020] The locking device may be adapted to limit rotation of the limiting plate about the rotating device to an angular range when in the second locked position. The angular range may span an angle of substantially 60°. The angular range may represent a range between 0° and 60°, or between 120° and 180° relative to the paving direction.
[0021] In the first limiting plate position, the limiting plate may have a first angle relative to a paving direction of the road paver. The limiting plate may be rotatable between a second angle and a third angle relative to the paving direction of the road paver when the locking device is in the second locked position. The limiting plate may have a third angle relative to the paving direction of the road paver in the third limiting plate position. The second angle may be located between the first angle and the third angle.
[0022] The first angle may be substantially between 80° and 100°, in particular 90°, relative to the pavement direction. The second angle may be substantially between 50° and 70°, in particular 60°, or between 110° and 130°, in particular 120°, relative to the pavement direction. The second angle may be inclined backwards relative to the pavement direction. The third angle may be substantially between 0° and 10°, in particular 0°, or between 170° and 180°, in particular 180°, relative to the pavement direction. The third angle may be inclined backwards relative to the pavement direction.
[0023] The locking device may have a latch adapted to select the first and second locked positions. The latch may be adapted to select the third locked position.
[0024] The locking device may have a latch adapted to select between the first locked position, the second locked position, and the third locked position. The locking device may have a latch adapted to select between the second locked position and the third locked position. The locking device may have a latch adapted to select between the first locked position and the third locked position. The latch may also select an unlocked position.
[0025] The latch may be coupled to the limiting plate. In the first locking position, the latch may abut with a first surface against a limiting device of the road paver, in particular a limiting device of the rotating device, when the limiting plate is in the first limiting plate position. As a result, rotation of the limiting plate in the direction of the minimum limiting plate position can be prevented by the latch. In the second locking position, the latch may abut with a second surface against a limiting device of the road paver, in particular a limiting device of the rotating device, when the limiting plate is in the second limiting plate position. As a result, rotation of the limiting plate in the direction of the maximum limiting plate position can be prevented by the latch.
[0026] The term "limiter" may refer to a component or surface that may contact the latch, thereby limiting movement of the latch in at least one direction.
[0027] The latch may be adapted to select a third locking position, in which the latch may abut with a third surface against a limiting device of the road paving machine, in particular a limiting device of a rotating device, when the limiting plate is in the third limiting plate position, so that rotation of the limiting plate in the direction of the maximum limiting plate position can be prevented by the latch.
[0028] The latch may be connected to the limiting plate directly or via at least one intermediate part. The latch may be rotatable together with the limiting plate around the rotating device.
[0029] The limiting plate may be fitted with a limiting plate projection, which may form a limiting device of the latch. In the first locking position, the latch may abut against the limiting device of the limiting plate projection with a surface facing away from the limiting plate. In the third locking position, the latch may abut against the limiting device of the limiting plate projection with a surface facing away from the limiting plate. In the first and third locking positions, the latch may abut against the same limiting device of the limiting plate projection with the same surface facing away from the limiting plate. The latch may have a projection in the thickness direction. In the second locking position, the latch may abut against the limiting device of the limiting plate projection with another surface, in particular a surface of the projection of the latch facing away from the rotation device.
[0030] The latch may be connected to a component of the road paving machine, in particular to a rotating device, and in a first locking position, when the limiting plate is in the first limiting plate position, the latch may abut with a first surface against the limiting device of the limiting plate, so that rotation of the limiting plate in the direction of the minimum limiting plate position can be prevented by the latch. In a second locking position, when the limiting plate is in the second limiting plate position, the latch may abut with a second surface against the limiting device of the limiting plate, so that rotation of the limiting plate in the direction of the maximum limiting plate position can be prevented by the latch.
[0031] In the third locking position, when the limiter plate is in the third limiter plate position, the latch may abut against the limiting device of the limiter plate with a third surface, such that rotation of the limiter plate towards the maximum limiter plate position is prevented by the latch.
[0032] The locking device may be adapted to select an unlocked position, and the limiting plate may be freely rotatable about the rotating device between a minimum limiting plate position and a maximum limiting plate position when the locking device is in the unlocked position.
[0033] The latch may be held in the first, second and / or third locked positions by its own weight. The latch may be held in the first and second locked positions by its own weight. The latch may be held in the unlocked position by its own weight.
[0034] The third locking position may be different from the first locking position and the second locking position.
[0035] The limiting plate assembly may have another limiting plate that is not adapted to be pivotable. The non-pivotable limiting plate may be designed to be laterally movable. The limiting plate assembly may have two other limiting plates that are not pivotable.
[0036] The rotating device may be attached to a road paver. The rotating device may be attached to a non-pivotable limiting plate. The rotating device may be attached to a non-pivotable movable limiting plate.
[0037] The rotation device may be formed as a hinge. The rotation device may allow rotation of the limiting plate around a vertical axis. The rotation device may be composed of a first cylinder and a second cylinder. The two cylinders may extend in a vertical direction. The second cylinder may be a hollow cylinder. The first cylinder may be arranged in the hollow cylinder. The two cylinders may be adapted to be rotatable relative to each other. The first cylinder or the second cylinder may be connected to the limiting plate. The other cylinder of the first cylinder or the second cylinder may be connected to a component of the road paving machine, in particular to a component of the limiting plate assembly, in particular to a non-pivotable limiting plate of the limiting plate assembly.
[0038] The first cylinder and the second cylinder allow the limiter plate to rotate relative to the rest of the limiter plate assembly.
[0039] The road paver may have a hydraulic cylinder adapted to extend and retract the limiting plate assembly. The road paver may have a hydraulic cylinder adapted to rotate the limiting plate about the rotating device. The road paver may have an electric drive adapted to rotate the limiting plate about the rotating device. The rotation of the limiting plate about the rotating device may be performed manually. The rotation of the limiting plate about the rotating device may be caused by the paving material, in particular when the paving material is conveyed towards the limiting plate by the lateral spreading device.
[0040] The latch may be bent in a first locking position, thereby preventing rotation of the limiting plate in the direction of the minimum limiting plate position. The latch may be bent in a third locking position, thereby preventing rotation of the limiting plate in the direction of the maximum limiting plate position. The latch may be under pressure in a second locking position, thereby preventing rotation of the limiting plate in the direction of the maximum limiting plate position.
[0041] The latch may be adapted according to the latch described in the third aspect of the invention. The latch may be a first latch. The locking device may comprise a second latch. The second latch may be adapted similarly to the first latch. The second latch may be adapted according to the latch described in the third aspect of the invention. The second latch may be arranged vertically below the first latch. The second latch may be arranged vertically above the first latch. The second latch may be adapted to select the second and third locking positions, particularly simultaneously with the first latch. The second latch may be adapted to select the first, second and third locking positions, particularly simultaneously with the first latch.
[0042] The road paver, in particular the rotary device, may have a second limiting device, which may interact with a second latch, which may be connected to the limiting plate.
[0043] In the first locked position of the second latch, a first surface of the second latch may abut against the second limiting device when the limiting plate is in the first limiting plate position, such that rotation of the limiting plate towards the minimum limiting plate position may be prevented by the second latch.
[0044] In the second locked position of the second latch, a second surface of the second latch may abut against the second limiting device when the limiting plate is in the second limiting plate position, such that rotation of the limiting plate towards the maximum limiting plate position may be prevented by the second latch.
[0045] In the third locked position of the second latch, a third surface of the second latch may abut against the second limiting device when the limiting plate is in the third limiting plate position, such that rotation of the limiting plate towards the maximum limiting plate position may be prevented by the second latch.
[0046] The second latch may be adapted to select only the second and third locked positions. The second latch may be adapted to select the unlocked position. The second limiting device may be adapted to select only the second and third locked positions.
[0047] The first latch may have a slot. The first latch may be attached to the limiting plate by a fastener, particularly a screw or a bolt, passing through the slot. The second latch may have a slot. The second latch may be attached to the limiting plate by a fastener, particularly a screw or a bolt, passing through the slot.
[0048] The limiting plate assembly may include a controller. The controller may be configured to rotate the limiting plate about the rotating device. The controller may be configured to move the limiting plate to the first, second and / or third limiting plate positions. The controller may be configured to move the latch to the unlocked position. The controller may be configured to move the latch to the first, second and / or third locked position.
[0049] A second aspect of the invention relates to a road paver comprising a screed assembly. The road paver may move along a paving direction during paving of the paving material. The screed assembly may have a variable width. The width of the screed assembly may be an extension of the screed assembly perpendicular to the paving direction. The road paver may comprise a lateral spreading device. The lateral spreading device may be adapted to spread the paving material transversely to the paving direction. The lateral spreading device may be a screw conveyor. The road paver comprises a first limiting plate assembly. The first limiting plate assembly may be configured according to the first aspect of the invention. The first limiting plate assembly is arranged in front of the lateral spreading device in the paving direction. The lateral spreading device is arranged in front of the screed assembly in the paving direction.
[0050] The first limiting plate assembly may be arranged on a first side of the road paver, for example, on the left side of the road paver in the paving direction. The road paver may have a second limiting plate assembly. The second limiting plate assembly may be configured according to the first aspect of the invention. The second limiting plate assembly may be arranged on a second side opposite the first side, for example, on the right side of the road paver in the paving direction. The first limiting plate assembly and the second limiting plate assembly may form a limiting plate device. The limiting plate device may additionally further comprise another limiting plate that is not pivotable. The limiting plate device may additionally comprise two other limiting plates that are not pivotable. The limiting plate device may comprise a hydraulic cylinder adapted to pivot the pivotable limiting plates of the first limiting plate assembly and the second limiting plate assembly. The limiting plate device may comprise an electric drive adapted to pivot the pivotable limiting plates of the first limiting plate assembly and the second limiting plate assembly.
[0051] The road paver may include a control device. The control device may be configured to rotate the limiting plate about the rotating device. The control device may be configured to move the limiting plate to the first, second and / or third limiting plate position. The control device may be configured to move the latch to the unlocked position. The control device may be configured to move the latch to the first, second and / or third locked position.
[0052] A third aspect of the invention relates to a locking mechanism for a pivotable component of a construction machine, in particular for a limiting plate assembly according to the first aspect of the invention. The locking mechanism comprises at least one locking component. The locking component comprises a first limiting device, a second limiting device and a third limiting device. The limiting devices may be adapted as surfaces. The locking mechanism further comprises at least one latch extending substantially along an axial direction between a first distal end and a second distal end. The latch may comprise an elongated hole. The elongated hole may extend in an axial direction of the latch, in particular arranged parallel to the axial direction. The latch may be rotatably attached to the pivotable component via the elongated hole by means of a fastener, in particular a screw or a bolt. The fastener may be movable within the elongated hole, whereby the latch is displaceable relative to the pivotable component. The latch may comprise a thickness protrusion at the first distal end. The thickness direction may extend perpendicular to the axial direction. The latch may be adapted in an L-shape. The projection may represent one leg of an L-shape. The other leg of the L-shape may be formed by an axial extension of the latch. The projection may have a sloped surface on a side facing away from the second distal end.
[0053] The latch may be displaceable to a first locking position. The latch may be displaceable to a second locking position. The latch may be displaceable to a third locking position. In the first locking position, a surface of the protrusion facing the second distal end of the latch may abut against the first limiting device. In the second locking position, a sloping surface of the protrusion may abut against the second limiting device. In the third locking position, a surface of the protrusion facing the pivotable component may abut against the third limiting device. The first locking position may be different from the second and / or third locking position. The second locking position may be different from the first and / or third locking position.
[0054] The inclined surface of the protrusion may extend obliquely with respect to the axial direction of the latch, in particular at an angle of 50° to 70°, in particular at an angle of 60°. The inclined surface of the protrusion may extend obliquely with respect to the thickness direction of the latch, in particular at an angle of 20° to 40°, in particular at an angle of 30°.
[0055] The second restriction device and the third restriction device may be the same restriction device.The second restriction device and the third restriction device may be defined by the same surface.
[0056] The locking component may be attached to the rotating device. The pivotable component may be attached to the rotating device. The pivotable component may be rotatable about the rotating device. The locking component may be adapted not to be rotatable about the rotating device.
[0057] When the latch is in the first locking position, the pivotable component may be movable between a first pivot angle and a second pivot angle. When the latch is in the second locking position, the pivotable component may be movable between a third pivot angle and a fourth pivot angle. When the latch is in the third locking position, the pivotable component may be movable between a fourth pivot angle and a fifth pivot angle.
[0058] The first swing angle may correspond to a maximum swing position. The rotation device or construction machine may be adapted such that the swivel component cannot swing further than the maximum swing position. The fifth swing angle may correspond to a minimum swing position. The rotation device or construction machine may be adapted such that the swivel component cannot swing further than the minimum swing position. The rotation device or construction machine may be adapted such that the swivel component can swing between the minimum swing position and the maximum swing position.
[0059] The first pivot angle may be the same as the second pivot angle. When the latch is in the first locking position, the pivotable component may be fixed in a position at the first or second pivot angle, particularly a maximum pivot position. The fourth pivot angle may be the same as the fifth pivot angle. When the latch is in the third locking position, the pivotable component may be fixed in a position at the fourth or fifth pivot angle, particularly a minimum pivot position.
[0060] When the latch is in the first locked position, the fastener may be located at an end of the slot facing the second distal end of the latch. When the latch is in the second locked position, the fastener may be located at an end of the slot facing the first distal end of the latch. When the latch is in the third locked position, the fastener may be located at an end of the slot facing the second distal end of the latch. When the latch is in the unlocked position, the fastener may be located at an end of the slot facing the second distal end of the latch.
[0061] The latch may be a first latch. The locking mechanism may have a second latch. The second latch may be adapted similarly to the first latch.
[0062] The locking component may be a first locking component. The locking mechanism may comprise a second locking component. The second locking component may be attached to the rotating device. The second locking component may be adapted not to rotate around the rotating device. The second locking component may comprise a first limiting device, a second limiting device and a third limiting device. Alternatively, the second locking component may comprise only one limiting device. The second locking component may be integrally formed with the first locking component.
[0063] The second latch may be displaced to a first, second and third locked position. The second latch may be displaced to an unlocked position. In the first locked position, a surface of the protrusion of the second latch facing the second distal end of the second latch may abut against a first limiting device of the second locking component. In the second locked position, a sloped surface of the protrusion of the second latch may abut against a second limiting device of the second locking component. In the third locked position, a surface of the protrusion of the second latch facing the pivotable component may abut against a third limiting device of the second locking component.
[0064] Instead, the second latch may only be displaced to the second and third locked positions and the unlocked position. In the second locked position, an inclined surface of a protrusion of the second latch may abut against a limiting device of the second locking component. In the third locked position, a surface of the protrusion of the second latch facing the pivotable component may abut against a limiting device of the second locking component. When the first latch is in the first locked position, the second latch may be in the unlocked position.
[0065] The protrusion may be attached to the pivotable component. The protrusion may form a limiting device of the latch. The protrusion may be adapted to an L-shape. In the first locking position, the latch may abut against the limiting device of the protrusion with a surface facing away from the pivotable component. In the third locking position, the latch may abut against the limiting device of the protrusion with a surface facing away from the pivotable component. In the first and third locking positions, the latch may abut against the same limiting device of the protrusion with the same surface facing away from the pivotable component. In the second locking position, the latch may abut against the limiting device of the protrusion of the pivotable component with another surface, in particular a surface of the protrusion of the latch facing towards the second distal end.
[0066] The road paver, in particular a road paver according to a second aspect of the invention, comprises a screed assembly. The road paver may move along a paving direction during paving of the paving material. The road paver comprises a lateral spreading device, in particular a screw conveyor. The road paver comprises a pivotable component. The pivotable component is arranged in front of the lateral spreading device in the paving direction. The road paver comprises a locking mechanism according to a third aspect of the invention. The locking mechanism may be adapted to fix the pivotable component in different positions or to limit rotation of the pivotable component.
[0067] The locking mechanism may include a control device. The control device may be configured to rotate the pivotable component. The control device may be configured to displace the latch to the unlocked position. The control device may be configured to displace the latch to the first, second and / or third locked positions.
[0068] A fourth aspect of the invention relates to the use of a locking mechanism according to the third aspect of the invention to lock a limiting plate assembly according to the first aspect of the invention.
[0069] A fifth aspect of the invention relates to a method for pivoting a limiting plate of a road paver, the method comprising the step of moving a locking device of the road paver to an unlocked position. When the locking device is in the unlocked position, the limiting plate is pivotable between a minimum limiting plate position and a maximum limiting plate position, in particular around a vertical axis. The method further comprises the step of pivoting the limiting plate to a limiting plate position that is between the minimum limiting plate position and the maximum limiting plate position. The method further comprises the step of moving the locking device to a locked position. In the locked position, the limiting plate is pivotable between a minimum limiting plate position and an intermediate limiting plate position. The intermediate limiting plate position is located between the minimum limiting plate position and the maximum limiting plate position.
[0070] The intermediate plate position may be closer to the maximum plate position than to the minimum plate position.
[0071] The method may further comprise the step of moving the locking device to an unlocked position and pivoting the limiting plate to a minimum or maximum limiting plate position. The locking device may then be moved to another locked position, in particular different from the other locked position. When the locking device is in the other locked position, the limiting plate may be fixed in the minimum or maximum limiting plate position.
[0072] The rotation of the limiting plate to the limiting plate position, the minimum limiting plate position, the intermediate limiting plate position, and / or the maximum limiting plate position may be performed by a hydraulic cylinder and / or an electric drive device. The rotation of the limiting plate to the limiting plate position, the minimum limiting plate position, the intermediate limiting plate position, and / or the minimum limiting plate position may be performed by a control device.
[0073] The movement of the locking device to the unlocked position may be performed manually. The movement of the locking device to the locked position may be performed manually. The movement of the locking device to the other locked position may be performed manually.
[0074] The limiting plate assembly according to the first aspect of the invention may be used in a road paver according to the second aspect of the invention and / or with method steps of the method according to the fifth aspect of the invention. The limiting plate assembly according to the first aspect of the invention may be used in combination with a locking mechanism according to the third aspect of the invention. The limiting plate assembly according to the first aspect of the invention and the locking mechanism according to the third aspect of the invention may be used according to the fourth aspect of the invention. The locking mechanism according to the third aspect of the invention may be used in a road paver according to the second aspect of the invention and / or with method steps of the method according to the fifth aspect of the invention. The use of the locking mechanism according to the fourth aspect of the invention may be carried out with the locking mechanism according to the third aspect of the invention in a road paver according to the second aspect of the invention and / or using method steps of the method according to the fifth aspect of the invention. The method according to the fifth aspect of the invention may be carried out using a limiting plate assembly according to the first aspect of the invention, a road paver according to the second aspect of the invention and / or a locking mechanism according to the third aspect of the invention.
[0075] The terms "first," "second," "third," and "fourth" should be understood as designating particular elements or components and do not necessarily imply a particular ordering of such components or elements. For example, the presence of a second component does not necessarily imply the presence of a first component, and vice versa.
[0076] Hereinafter, the present invention will be described in more detail with reference to embodiments. [Brief description of the drawings]
[0077] [Figure 1] 1 is a schematic side view of a road paver equipped with a limiting plate assembly according to an embodiment of the present invention; [Diagram 2] 1 is a schematic top view of a road paver equipped with a limiting plate assembly according to an embodiment of the present invention; FIG. [Diagram 3] 3 is a schematic front view showing a part of the limiting plate device of FIG. 2. [Figure 4] 1 is a schematic top view illustrating a limiter plate assembly according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a detailed view of a latch according to an embodiment of the present invention. [Figure 6] FIG. 2 is a detailed view showing a locking device according to an embodiment of the present invention in an unlocked position. [Figure 7] FIG. 6 is a detailed view showing the locking device of FIG. 5 in a first locking position. [Figure 8] FIG. 6 is a detailed view showing the locking device of FIG. 5 in a second, locked position. [Figure 9] FIG. 6 is a detailed view showing the locking device of FIG. 5 in a third locking position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0078] FIG. 1 shows a road paver 1 according to an embodiment of the invention. The road paver 1 comprises a towing vehicle 2 and a screed assembly 3. The screed assembly 3 is arranged behind the towing vehicle 2 in relation to the paving direction 100. The screed assembly 3 is only diagrammatically moving in FIG. 1. A material hopper 4 for receiving the paving material is arranged in the front region of the road paver 1. The paving material, also called paving substance, is conveyed backwards by a material conveying device of the towing vehicle 2 in relation to the paving direction 100 and is supplied to the screed assembly 3. In the rear region of the towing vehicle 2, a lateral spreading device 5 is provided in front of the screed assembly 3, which spreads the paving material in a direction perpendicular to the paving direction 100. A limiting plate device 6 with at least one limiting plate assembly 7 is arranged in front of the lateral spreading device 5 in the paving direction 100. The limiting plate device 6 prevents deviation of the paving material in the direction of the paving direction 100.
[0079] FIG. 2 shows a top view of a road paver 1 according to an embodiment of the invention. The screed assembly 3 comprises a base screed 8. The base screed has a base screed working width 201. The base screed working width 201 may be an extension of the base screed 8 in a lateral direction 200. The lateral direction 200 extends perpendicular to the paving direction 100. The screed assembly 3 may additionally comprise an extension screed 9. The total working width 202 is made up of the base screed 8 and the extension screed 9. The extension screed 9 may be adapted to be movable relative to the base screed 8 in the lateral direction 200. This allows the total working width 202 to be varied. The screed assembly 3 may further comprise side shields 10. The side shields 10 extend in particular in the paving direction 100 and prevent the paving material from being spread in the lateral outer areas of the screed assembly 3.
[0080] The lateral spreading device 5 is arranged in front of the screed assembly 3 in the paving direction 100. The limiting plate device 6 is arranged in front of the lateral spreading device 5 in the paving direction 100. The limiting plate device 6 comprises a limiting plate assembly 7. The limiting plate assembly 7 comprises a pivotable limiting plate 11. The limiting plate 11 is rotatable around a rotating device 12, in particular around a vertical axis.
[0081] The limiting plate device 6 may have a base limiting plate 13. The base limiting plate 13 extends substantially in the lateral direction 200. The limiting plate device 6 may additionally have an expandable limiting plate 14. The expandable limiting plate 14 may be moved in the lateral direction 200 relative to the base limiting plate 13 by a traversing device 15, for example a hydraulic cylinder or an electric drive machine. The laterally expandable limiting plate 14 may be used to vary the effective width of the limiting plate device 6. The limiting plate device 6 may have an intermediate limiting plate 16. The intermediate limiting plate 16 may be disposed between the base limiting plate 13 and the expandable limiting plate 14. The expandable limiting plate 14 may be attached to the base limiting plate 13 or to the intermediate limiting plate 16. The traversing device 15 may be attached to the base limiting plate 13 or to the intermediate limiting plate 16.
[0082] The rotation device 12 may be attached to the base limiting plate 13, the expandable limiting plate 14, or the intermediate limiting plate 16. Thus, the pivotable limiting plate 11 can rotate relative to the base limiting plate 13, the expandable limiting plate 14, or the intermediate limiting plate 16.
[0083] The limiting plate device 6 may have two limiting plate assemblies 7, as shown in Fig. 2. The two limiting plate assemblies 7 may be advantageously arranged on the left and right sides of the road paver 1, respectively. The limiting plate device 6 may have two extendable limiting plates 14, two traversing devices 15, and two intermediate limiting plates 16, as shown in Fig. 2. These may be advantageously arranged on the left and right sides of the road paver 1, respectively.
[0084] Fig. 3 shows a front view of the limiting plate device 6 of Fig. 2. The limiting plate device 6 comprises a base limiting plate 13, to which an intermediate limiting plate 16 is attached in a lateral direction 200. A traversing device 15 is attached to the intermediate limiting plate 16 and adapted to move the extendable limiting plate 14 in the lateral direction 200 adjacent to the intermediate limiting plate 16. The pivotable limiting plate 11 is attached to the extendable limiting plate 14 via a rotation device 12. The rotation device 12 is adapted to enable the pivotable limiting plate 11 to rotate about a vertical axis.
[0085] 4 shows a schematic top view of a limiting plate assembly 7 according to an embodiment of the present invention. In this embodiment, the limiting plate assembly 7 is directly attached to a base limiting plate 13. A pivotable limiting plate 11 is attached to the base limiting plate 13 via a rotating device 12. The pivotable limiting plate 11 can rotate around the rotating device 12 between a minimum limiting plate position 17 and a maximum limiting plate position 18.
[0086] FIG. 4 shows the pivotable limiting plate 11 in a first limiting plate position 19, a second limiting plate position 20 and a third limiting plate position 21. The first limiting plate position 19 corresponds to the maximum limiting plate position 18. The third limiting plate position 21 corresponds to the minimum limiting plate position 17. In the first limiting plate position 19, the limiting plate 11 has a first angle 22 with respect to the paving direction 100. The first angle 22 may be 90°. In the second limiting plate position 20, the limiting plate 11 has a second angle 23 with respect to the paving direction 100. The second angle 23 may be 120°. In the third limiting plate position 21, the limiting plate 11 has a third angle 24 with respect to the paving direction 100. The third angle 24 may be 180°. In the third limiting plate position 21, the limiting plate 11 is arranged parallel to the paving direction 100.
[0087] The limiting plate assembly 7 also includes a locking device 25 having a first latch 26. The locking device 25 may also include a second latch 27.
[0088] The first latch 26 is shown in a detailed view in FIG. 5. The first latch 26 has a latch base body 28 extending substantially along an axial direction 300 between a first distal end 29 and a second distal end 30. The material thickness of the first latch 26 is measured in a thickness direction 400. The thickness direction 400 of the first latch 26 is the direction in which the first latch 26 has a minimum extension. The first latch 26 has a protrusion 31 in the thickness direction 400 at the first distal end 29. The material thickness of the protrusion 31 is greater than the material thickness of the latch base body 28. The protrusion 31 has an inclined surface 32 on a side facing away from the second distal end 30. The inclined surface 32 extends obliquely with respect to the axial direction 300, the angle being different from 90°. The inclined surface 32 extends obliquely with respect to the thickness direction 400. A surface 33 of the protrusion 31 facing the second distal end 30 extends perpendicular to the axial direction 300. The first latch 26 further comprises a slot 34. The slot 34 may be disposed in the latch base body 28 and extend in the axial direction 300. The second latch 27 may be adapted similarly to the first latch 26.
[0089] 6 to 9 show detailed views of the locking device 25 according to an embodiment of the invention in the unlocked position and in three locked positions. The first latch 26 and the second latch 27 are each connected to the pivotable limiting plate 11 via a screw 35 guided through an elongated hole 34. In the illustrated embodiment, the latches 26, 27 are not directly connected to the limiting plate 11, but are each indirectly connected via an intermediate part 36. The intermediate part 36 may be welded to the limiting plate 11. The intermediate part 36 is also connected to a component of the rotating device 12, for example by welding. This component, and thus the limiting plate 11, is rotatable around other parts of the rotating device 12. The limiting plate 11 may additionally have two limiting plate protrusions 37. The two limiting plate protrusions 37 are connected to the limiting plate 11, for example by welding, and are each arranged below the intermediate part 36.
[0090] The locking device 25 further comprises a first locking component 38. The first locking component 38 comprises a first limiting device 39, a second limiting device 40 and a third limiting device 41. The second limiting device 40 and the third limiting device 41 may be the same limiting device. The term limiting device may refer to a component or a surface that may come into contact with the first latch 26, thereby limiting the movement of the first latch 26 in at least one direction. The locking device 25 further comprises a second locking component 42. The second locking component 42 comprises a limiting device 43. The first locking component 38 may be integrally formed with the second locking component 42. The first locking component 38 and the second locking component 42 are connected to the rotating device 12. The first locking component 38 and the second locking component 42 do not rotate around the rotating device 12. The limiting plate 11 , and thus the first and second latches 26 and 27 , rotate relative to the first and second locking components 38 and 42 .
[0091] 6 shows the locking device 25 in the unlocked position. The two latches 26, 27 may be tilted away from the rotating device 12. The two latches 26, 27 may rest on their respective limiting plate projections 37. The two latches 26, 27 are held in the unlocked position by their own weight. The screws 35 are arranged at the ends of the slots 34 of the first latch 26 and the second latch 27 that face the second distal end 30. The limiting plate 11 may rotate around the rotating device 12 between a minimum limiting plate position 17 and a maximum limiting plate position 18.
[0092] 7 shows the locking device 25 in the first locking position. The limiting plate 11 is in the first limiting plate position 19. The first latch 26 is inclined towards the rotation device 12. The surface 33 of the projection 31 of the first latch 26 facing the second distal end 30 abuts against a first limiting device 39 of the first locking component 38. The first limiting device 39 has a surface that extends obliquely to the horizontal plane and obliquely to the vertical plane. The interaction between the first latch 26 and the first locking component 38 prevents the rotation of the limiting plate 11 in the direction of the minimum limiting plate position 17.
[0093] 7, the second latch 27 is in an unlocked position. The screw 35 of the first latch 26 is disposed at the end of the slot 34 of the first latch 26 that faces the second distal end 30 of the first latch 26. The screw 35 of the second latch 27 is disposed at the end of the slot 34 of the second latch 27 that faces the second distal end 30 of the second latch 27.
[0094] Alternatively, the second latch 27 may also be in the first locking position, in which case the second locking component 42 has the same shape as the first locking component 38.
[0095] 8 shows the locking device 25 in the second locking position. The limiting plate 11 is in the second limiting plate position 20. The two latches 26, 27 are inclined towards the rotating device 12. The screw 35 of the first latch 26 is arranged at the end of the slot 34 of the first latch 26 that faces the first distal end 29 of the first latch 26. The screw 35 of the second latch 27 is arranged at the end of the slot 34 of the second latch 27 that faces the first distal end 29 of the second latch 27.
[0096] The inclined surface 32 of the first latch 26 abuts against a second limiting device 40 of the first locking component 38. A surface 33 of the projection 31 of the first latch 26 facing the second distal end 30 may abut against a limiting plate projection 37 assigned to the first latch 26.
[0097] The inclined surface 32 of the second latch 27 abuts against a limiting device 43 of the second locking component 42. The surface 33 of the projection 31 of the second latch 27 facing the second distal end 30 may abut against a limiting plate projection 37 assigned to the second latch 27.
[0098] Rotation of the limit plate 11 towards the maximum limit plate position 18 is prevented by interaction between the first latch 26, the first locking component 38 and possibly the limit plate projection 37. Rotation of the limit plate 11 towards the maximum limit plate position 18 is prevented by interaction between the second latch 27, the second locking component 42 and possibly the limit plate projection 37.
[0099] 9 shows the locking device 25 in the third locking position. The limiting plate 11 is in the third limiting plate position 21. The two latches 26, 27 are inclined towards the rotating device 12. The screw 35 of the first latch 26 is arranged at the end of the slot 34 of the first latch 26 that faces the second distal end 30 of the first latch 26. The screw 35 of the second latch 27 is arranged at the end of the slot 34 of the second latch 27 that faces the second distal end 30 of the second latch 27.
[0100] The surface of the first latch 26 facing towards the limiting plate 11 abuts against a third limiting device 41 of the first locking component 38. The surface of the first latch 26 facing away from the limiting plate 11 may abut against a limiting plate projection 37 assigned to the first latch 26.
[0101] The surface of the second latch 27 facing towards the limiting plate 11 abuts against a limiting device 43 of the second locking component 42. The surface of the second latch 27 facing away from the limiting plate 11 may abut against a limiting plate projection 37 assigned to the second latch 27.
[0102] Rotation of the limit plate 11 towards the maximum limit plate position 18 is prevented by interaction between the first latch 26, the first locking component 38 and possibly the limit plate projection 37. Rotation of the limit plate 11 towards the maximum limit plate position 18 is prevented by interaction between the second latch, the second locking component 42 and possibly the limit plate projection 37.
Claims
1. A limiting plate (11); A rotating device (12); A locking device (25); Equipped with The limiting plate (11) is attached to a component of the road paving machine (1) via the rotating device (12); The limiting plate (11) is rotatable around the rotating device (12) between a minimum limiting plate position (17) and a maximum limiting plate position (18); The locking device (25) is adapted to select a first locking position and a second locking position; the locking device (25) is adapted, in the first locking position, to prevent rotation of the limiting plate (11) around the rotating device (12) in the direction of the minimum limiting plate position (17) when the limiting plate (11) is in the first limiting plate position (19), and, in the second locking position, to prevent rotation of the limiting plate (11) around the rotating device (12) in the direction of the maximum limiting plate position (18) when the limiting plate (11) is in the second limiting plate position (20). A limiting plate assembly (7) for a road paver (1).
2. The locking device (25) is adapted to select a third locking position; the locking device (25) is adapted, in the third locking position, to prevent rotation of the limiting plate (11) around the rotating device (12) in the direction of the maximum limiting plate position (18) when the limiting plate (11) is in the third limiting plate position (21); The limiting plate assembly of claim 1 .
3. the locking device (25) is adapted, in the second locking position, to prevent rotation of the limiting plate (11) around the rotating device (12) in the direction of the minimum limiting plate position (17) when the limiting plate (11) is in a fourth limiting plate position. The limiting plate assembly of claim 2 .
4. the limiting plate (11) in the first limiting plate position (19) has a first angle (22) with respect to a paving direction (100) of the road paver (1); When the locking device (25) is in the second locking position, the limiting plate (11) is rotatable between a second angle (23) and a third angle (24) relative to a paving direction (100) of the road paver (1); the limiting plate (11) in the third limiting plate position (21) has the third angle (24) with respect to a paving direction (100) of the road paving machine (1); The second angle (23) is located between the first angle (22) and the third angle (24). The limiting plate assembly according to claim 2 or 3.
5. the locking device (25) comprises a latch (26) adapted to select between the first locking position and the second locking position; the latch (26) is held in the first and second locking positions, in particular by its own weight; The limiting plate assembly according to any one of claims 1 to 4.
6. The latch (25) is connected to the limiting plate (11), In the first locking position, when the limiting plate (11) is in the first limiting plate position (19), the latch (26) abuts against a limiting device (39) of the road paving machine (1) with a first surface (33), and rotation of the limiting plate (11) in the direction of the minimum limiting plate position (17) is prevented by the latch (26); and / or in the second locked position, when the limiting plate (11) is in the second limiting plate position (20), the latch (26) abuts against a limiting device (40) of the road paver (1) with a second surface (32), and rotation of the limiting plate (11) in the direction of the maximum limiting plate position (18) is prevented by the latch (26). The limiting plate assembly of claim 5 .
7. the latch (26) is adapted to select the third locked position; In the third locking position, when the limiting plate (11) is in the third limiting plate position (21), the latch (26) abuts a third surface against a limiting device (41) of the road paver (1), and the rotation of the limiting plate (11) in the direction of the maximum limiting plate position (18) is prevented by the latch (26). A limiting plate assembly according to claim 5 or 6 which recites claim 2.
8. The latch (26) is connected to a component of the road paver (1), In the first locking position, when the limiting plate (11) is in the first limiting plate position (19), the latch (26) abuts against the limiting device of the limiting plate (11) at a first surface, and the rotation of the limiting plate (11) in the direction of the minimum limiting plate position (17) is prevented by the latch (26); and / or in the second locking position, when the limiting plate (11) is in the second limiting plate position (20), the latch (26) abuts with a second surface against a limiting device of the limiting plate (11), and the rotation of the limiting plate (11) in the direction of the maximum limiting plate position (18) is prevented by the latch (26). The limiting plate assembly of claim 5 .
9. The locking device (25) is adapted to select an unlocked position, When the locking device (25) is in the unlocked position, the limiting plate (11) is freely rotatable around the rotating device (12) between the minimum limiting plate position (17) and the maximum limiting plate position (18). The limiting plate assembly according to any one of the preceding claims.
10. The limiting plate assembly (7) is provided with a pivoting device, The pivoting device is adapted to rotate the limiting plate (11) around the rotating device (12); The swivel device includes a hydraulic cylinder and / or an electric drive device. The limiting plate assembly according to any one of the preceding claims.
11. A screed assembly (3); a lateral spreading device (5) adapted to spread paving material transversely to the paving direction (100) of the road paver (1); A limiting plate assembly (7) according to any one of claims 1 to 10, Equipped with The limiting plate assembly (7) is arranged in front of the lateral spreading device in the paving direction (100), Road paving machine (1).
12. A locking mechanism for a swivellable component of a construction machine, in particular a limiting plate assembly (7) according to any one of claims 1 to 10, comprising: at least one locking component (38) having a first limiting device (39), a second limiting device (40) and a third limiting device (41); at least one latch (26) extending substantially along an axial direction (300) between a first distal end (29) and a second distal end (30); Equipped with The latch (26) has a slot (34) through which the latch (26) is rotatably attached to the pivotable component by a fastener; The latch (26) has a thickness projection (31) at the first distal end (29); The protrusion (31) has an inclined surface (32) on a side facing away from the second distal end (30); The latch (26) is displaceable into a first locking position, a second locking position, and a third locking position; In the first locking position, a surface (33) of the projection (31) facing the second distal end (30) abuts against the first limiting device (39); In the second locking position, the inclined surface (39) abuts against the second limiting device (40); in the third locking position, the surface of the projection (31) facing the pivotable component abuts against the third limiting device (41), Locking mechanism.
13. When the latch (26) is in the first, locked position, the pivotable component is movable between a first pivot angle and a second pivot angle; When the latch (26) is in the second, locked position, the pivotable component is movable between a third pivot angle and a fourth pivot angle; and / or when the latch is in the third locked position, the pivotable component is movable between the fourth and fifth pivot angles. The locking mechanism of claim 12.
14. Use of a locking mechanism according to claim 12 or 13 to lock a limiting plate assembly according to any one of claims 1 to 10.
15. A method for rotating a limiting plate (11) of a road paving machine (1), comprising the steps of: moving a locking device of the road paver to an unlocked position to allow the limiting plate (11) to pivot between a minimum limiting plate position (17) and a maximum limiting plate position (18); pivoting the limiting plate (11) to a limiting plate position located between the minimum limiting plate position (17) and the maximum limiting plate position (18); moving the locking device to a locked position to allow the limiting plate (11) to pivot between the minimum limiting plate position (17) and an intermediate limiting plate position; Equipped with The intermediate limiting plate position is located between the minimum limiting plate position (17) and the maximum limiting plate position (18). method.