Construction machine

Abstract

A construction machine for paving a road surface includes: a machine frame supported by a traveling device; an operator platform disposed on the machine frame; and a protective canopy disposed on the operator platform, the height of which is adjustable via a telescopic guide unit, the telescopic guide unit including at least one first telescopic element and at least one second telescopic element, the first telescopic element being at least partially guided within the second telescopic element; at least one drive device for moving the protective canopy vertically by moving the first telescopic element relative to the second telescopic element; at least one latching element and at least one recess in the first telescopic element, the latching element being pivotable and shaped about a pivot axis on the second telescopic element, i.e., by moving the first telescopic element relative to the second telescopic element in a first direction, a first portion of the latching element is pivotable into the recess, and a second portion of the latching element is externally pressed against the outside of the first telescopic element.

Description

Technical Field

[0001] This invention relates to construction machinery. Background Technology

[0002] Known construction machinery includes a machine frame supported by a traveling device, an operator platform arranged on the machine frame, and a protective canopy whose height is adjustable via a telescopic guide unit arranged on the operator platform. The telescopic guide unit typically includes at least one first telescopic element and at least one second telescopic element, wherein the first telescopic element is at least partially guided within the second telescopic element. Furthermore, at least one drive unit is provided for moving the protective canopy vertically by moving the first telescopic element relative to the second telescopic element.

[0003] When using this type of adjustable protective canopy, problems often arise such as swaying and rattling during the movement of construction machinery. To avoid this, existing technology provides a telescopic guide unit with a complex design including guide elements. Summary of the Invention

[0004] Therefore, the object of the present invention is to create a relatively simple design for adjusting a protective canopy, wherein the swaying and rattling of the protective canopy are reduced.

[0005] The above objectives are achieved by means of the features of the present invention.

[0006] The invention advantageously provides at least one latching element and at least one recess in a first telescopic element, wherein the latching element is arranged to pivot about a pivot axis on a second telescopic element and is shaped such that a first portion of the latching element can pivot into the recess by moving the first telescopic element relative to the second telescopic element in a first direction, and a second portion of the latching element presses against the outside of the first telescopic element from the outside.

[0007] The advantages of this invention are that, on the one hand, the latching element is arranged on the second telescopic element and therefore will not be lost, and on the other hand, the latching element applies an external force to the outside of the first telescopic element, thereby reducing any potential wobbling and rattling of the telescopic guide unit.

[0008] In the latched position, the first portion of the latching element may be in the recess, and the second portion of the latching element may be pressed against the first telescopic element in such a way that the first telescopic element may be tilted or locked in the appropriate position in the second telescopic element accordingly.

[0009] The tilting of the first telescopic element within the second telescopic element has the advantage of reducing the swaying and rattling of the telescopic guide unit.

[0010] Once the latching element is in the latched position, further movement of the first telescopic element relative to the second telescopic element in the first direction is no longer possible because the second portion of the latching element is already pressed against the outside of the first telescopic element, and therefore further pivoting movement of the latching element is impossible. The first telescopic element can be said to be in the stopped position. If an additional force is applied to the first telescopic element in the first direction, this only increases the force exerted by the first telescopic element on the first portion of the latching element, and thus indirectly increases the force exerted by the second portion of the latching element against the outside of the first telescopic element.

[0011] For the purpose of adjusting the first telescopic element relative to the second telescopic element, the latching element can be pivoted to an adjustment position in which, on the one hand, the first part of the latching element pivots out of the recess, and the second part of the latching element does not press against the outside of the first telescopic element, so that the first telescopic element can be guided with clearance in the second telescopic element.

[0012] Since the first telescopic element can be guided at least partially within the second telescopic element with clearance, the first telescopic element can be adjusted relatively easily relative to the second telescopic element. Even if dust or the like enters the telescopic guide unit, adjustment of the first telescopic element relative to the second telescopic element can still be achieved due to the clearance.

[0013] For the purpose of pivoting the latching element from the latching position to the adjusting position, the first part of the latching element, the pivot axis, and the second part of the latching element may be arranged relative to each other in such a way that the first part of the latching element may have a profile in which the first telescopic element pivots out of the recess and into the adjusting position by moving the first telescopic element relative to the second telescopic element in a second direction opposite to the first direction.

[0014] This has the following advantages: the first telescopic element can be adjusted relative to the second telescopic element in a second direction opposite to the first direction in a very simple manner. The latching element moves into the adjusted position only due to the adjustment in the second direction.

[0015] This is advantageous compared to existing technologies, which typically involve inserting bolts that must be removed beforehand, regardless of whether the telescopic element is adjusted in the first or second direction.

[0016] For the purpose of pivoting the latching element from the adjusting position to the latching position, the first telescopic element can move relative to the second telescopic element in a first direction, and once the latching element is at the height of the recess, the first portion of the latching element can pivot into the recess due to its own weight and / or due to the spring force of the spring element.

[0017] Preferably, the adjusting element of the lever arm can be connected to the latching element, through which the latching element can pivot away from the first telescopic element into a retracted position, in which the first portion of the latching element does not pivot into the recess even during the movement of the first telescopic element in the first direction.

[0018] When the latching element is in the retracted position, the telescopic guide unit and therefore the protective canopy can be retractable, and the latching element does not automatically pivot into the recess.

[0019] The first direction in which the telescopic element can move can be the same as the direction in which gravity acts, such that in the latched position, the total weight of the first telescopic element and the protective canopy connected thereto acts on the first part of the latching element and causes the latching element to pivot in such a direction that the second part of the latching element presses against the outside of the first telescopic element.

[0020] In the second telescopic element, at least one guide element may be provided, which guides the first telescopic element in the second telescopic element.

[0021] The first telescopic element can be guided within the second telescopic element, and the clearance therein can be adjusted by at least one guiding element.

[0022] At least one guiding element may be a slipper and / or a guide roller.

[0023] The protective canopy can preferably be positioned offset relative to the longitudinal axis of the first telescopic element. This has the advantage that the telescopic guide unit can be positioned, for example, at the rear of the operator platform and the protective canopy can extend across the entire operator platform.

[0024] In the retracted position of the telescopic guide unit, the protective canopy is at its lowest point. Construction machinery can be transported in this position. The protective canopy can be secured in this position with a lock. For example, this can protect the operator platform from damage, or it can prevent wind from entering under the canopy during transport.

[0025] The first and second telescopic elements can be square tubes.

[0026] The drive unit can be a hydraulic drive and / or a mechanical drive, which may be manually operated, for example. This could be a cable winch. Attached Figure Description

[0027] In the following description, an embodiment of the invention will be described in more detail with reference to the accompanying drawings.

[0028] The following is illustrated schematically:

[0029] Figure 1: Construction machinery with a protective canopy;

[0030] Figure 2: Telescopic guide unit with protective canopy;

[0031] Figure 3: According to Figure 2 Detailed view;

[0032] Figure 4: Latch element;

[0033] Figure 5: According to the figure in the retracted position Figure 4 latching elements;

[0034] Figure 6: Telescopic guide unit in the retracted position; and

[0035] Figure 7: According to Figure 6 Different views of the telescopic guide unit. Detailed Implementation

[0036] Figure 1 illustrates construction machinery used for paving surfaces. The construction machinery includes a traveling device 3. The traveling device 3 can be a wheeled or tracked ground engagement unit. The construction machinery also includes a machine frame 5. The machine frame 5 is preferably connected to the traveling device 3 via a lifting column. The distance between the machine frame 5 and the paved surface can therefore be adjustable.

[0037] The traveling device 3 can also be rigidly connected to the machine frame 5 instead.

[0038] Preferably, a working device 9 is arranged on the machine frame 5, which can be used to pave the ground.

[0039] An operator platform 11 is mounted on the machine frame 5. The operator can stand or sit on the operator platform 11 and operate the construction machinery.

[0040] A protective canopy 13, whose height can be adjusted via a telescopic guide unit 2, can be installed on the operator platform 11.

[0041] from Figure 2 It can be deduced that the telescopic guide unit 2 includes at least one first telescopic element 4 and at least one second telescopic element 6, wherein the first telescopic element 4 can be guided at least partially in the second telescopic element 6.

[0042] In addition, a drive device 10 is provided for moving the protective canopy 13 up and down.

[0043] Figure 3 The text describes something from... Figure 2The details, which describe the telescopic guide unit 2 and the drive unit 10 in more detail, are provided below. The telescopic guide unit 2 includes a first telescopic element 4 and a second telescopic element 6, wherein the first telescopic element 4 is at least partially guided within the second telescopic element 6. The second telescopic element 6 is preferably directly or indirectly connected to the machine frame 5.

[0044] When the first telescopic element 4 can be guided within the second telescopic element 6 and the first telescopic element 4 is adjusted relative to the second telescopic element 6, the portion 4a protruding relative to the second telescopic element 6 on the side 30 of the second telescopic element 6 is lengthened or shortened. As a result, the height of the protective canopy can be adjusted relative to the second telescopic element 6 and thus relative to the machine frame 5.

[0045] Figure 4 It shows Figure 3 along Figure 3 A cross-sectional view depicting the direction IV-IV.

[0046] Figure 4 The image depicts a latching element 12. The latching element 12 is arranged to pivot about a pivot axis 16 on the second telescopic element 6. The latching element 12 includes a first portion 18 and a second portion 20. Furthermore, the first telescopic element 4 includes at least one recess 14. The latching element 12 is shaped such that by moving the first telescopic element 4 relative to the second telescopic element 6 in a first direction B, the first portion 18 of the latching element 12 can pivot into the recess 14, and the second portion 20 of the latching element 12 presses against the outer side 22 of the first telescopic element 4 from the outside.

[0047] When the first telescopic element 4 moves relative to the second telescopic element 6 in direction B and the recess 14 is at the height of the first portion 18 of the latching element 12, the latching element 12 pivots into the recess 14 in direction 36 due to the weight of the latching element 12 and / or due to a spring element (not depicted). The second portion 20 of the latching element 12 then presses against the outer side 22. Once the latching element 12 is in the latched position, further movement of the first telescopic element 4 relative to the second telescopic element 6 in the first direction B is no longer possible because the second portion 20 of the latching element 12 has already pressed against the outer side 22 of the first telescopic element 4, and therefore further pivoting movement of the latching element 12 is impossible. The first telescopic element 4 can be said to be in the stopped position. If an additional force is applied to the first telescopic element 4 in the first direction B, this only increases the force exerted by the first telescopic element 4 on the first portion 18 of the latching element 12, and therefore also indirectly increases the force of the second portion 20 of the latching element 12 pressing against the outer side 22 of the first telescopic element 4.

[0048] The first direction B preferably acts substantially in the same direction as the gravitational force, such that in the latched position, the total gravity of the first telescopic element 4 and the protective canopy 13 connected thereto acts on the first portion 18 of the latching element 12, and the latching element 12 pivots in direction 36 such that the second portion 20 of the latching element 12 presses against the outer side 22 of the first telescopic element 4.

[0049] In the latched position, the first portion 18 of the latching element 12 is located in the recess 14, and the second portion 20 of the latching element 12 presses against the first telescopic element 4 in such a way that the first telescopic element 4 is correspondingly engaged or tilted in the second telescopic element 6, or can be locked in place. This has the advantage of significantly reducing vibration and rattling because the first telescopic element 4 is tilted in this position in the second telescopic element 6.

[0050] Figure 3 and Figure 4 The adjusting element 8, which is implemented as a lever element, is further depicted, and its function is explained in more detail in the further figures.

[0051] Figure 4 Guide elements are depicted, which are arranged on the second telescopic element 6 and guide the first telescopic element 4 within the second telescopic element 6. The guide elements are sliding guides 50, 52 and / or guide rollers 54. The guide elements are adjustable, such that the clearance of the first telescopic element 4 guided within the second telescopic element 6 is adjustable.

[0052] Figure 4 A second direction C, opposite to the first direction B, is also depicted. When the first telescopic element 4 is adjusted relative to the second telescopic element 6 along the second direction C, the latching element 12 pivots along the rotation direction 40 because the first portion 18 of the latching element 12 moves together with the recess 14 along the second direction C. As a result, the latching element 12 pivots along the rotation direction 40. Consequently, the first portion 18 of the latching element 12 pivots out of the recess 14, and the second portion 20 of the latching element 12 also pivots away from the outer side 22. The first telescopic element 4 can then be adjusted arbitrarily along the second direction C until the protective canopy 13 has reached the desired height. When the protective canopy 13 is at the desired height, the first telescopic element 4 can be guided again along the first direction B. Once the first portion 18 of the latching element 12 is then at the height of the recess 14, the first portion 18 of the latching element 12 can pivot again into the recess 14, and the second portion 20 of the latching element 12 can again press against the outer side 22 of the first telescopic element 4.

[0053] However, when the protective canopy 13 is to be fully retracted, the latching element 12 must be in the retracted position.

[0054] The retraction position is at Figure 5 Depicted in the middle. For this purpose, the first telescopic element 4 first moves again relative to the second telescopic element 6 in the second direction C. As a result, as previously described, the first portion 18 of the latching element 12 pivots out of the corresponding recess 14 and the second portion 20 of the latching element 12 no longer presses against the outer side 22. However, if the protective canopy 13 is to be fully pivoted in next, the adjusting element 8 operates in such a way that the latching element 12 remains pivoted in the rotation direction 40. This can be done manually or by a motor. The retracted position is in Figure 5 As depicted in the diagram. In this configuration, the first portion 18 and the second portion 20 of the latching element 12 pivot away from the outer side 22 of the first telescopic element 4. The first telescopic element 4 can then be guided with clearance in the second telescopic element 6, and the first telescopic element 4 can be guided in the first direction B, which results in the protective canopy 13 being retractable.

[0055] For example, Figure 6 The protective canopy 13 or a portion thereof is depicted in the retracted position. Part 4a of the first telescopic element 4 is relatively small on the side 30 of the second telescopic element 6, while part 4b of the first telescopic element 4 is relatively large on the second side 32 of the second telescopic element 6.

[0056] Figure 7 Different views are depicted, from which it can be seen that multiple recesses 14 are provided in the first telescopic element 4, and the first portion 18 of the latching element 12 can pivot into the recesses. The protective canopy 13 can thus be locked at multiple heights. The outline of the latching element 12, as well as the outlines of the first portion 18 and the second portion 20 of the latching element 12, and the position of the pivot axis 16, are determined by testing on a specific machine in each case. In this process, it must be ensured that the first portion 18 of the latching element 12 can pivot into the recesses 14, and in the pivoted-in position, the second portion 20 of the latching element 12 can press against the outer side 22 of the first telescopic element 4, and that the first portion 18 of the latching element 12 can pivot out of the recesses 14 when the first telescopic element 4 moves in the second direction C. Tests were also conducted to determine how large the distance must be between the first part 18 and the second part 20 of the latching element 12 and the pivot axis 16 so that the second part 20 can press against the first telescopic element 4 with sufficient force in the pivoted position, so that vibration and rattling no longer occur or are reduced in degree.

Claims

1. A construction machine for paving a road surface, said construction machine (1) comprising: - Machine frame (5) supported by traveling device (3); - An operator platform (7) arranged on the machine frame (5) and a protective canopy (13) arranged on the operator platform (7) whose height can be adjusted by a telescopic guide unit (2). - The telescopic guide unit (2) includes at least one first telescopic element (4) and at least one second telescopic element (6), wherein the first telescopic element (4) is at least partially guided in the second telescopic element (6); - At least one drive device (10) for moving the protective canopy (13) up and down by moving the first telescopic element (4) relative to the second telescopic element (6); The invention is characterized by providing at least one latching element (12) and at least one recess (14) in the first telescopic element (4), wherein the latching element (12) is arranged to pivot about a pivot axis (16) on the second telescopic element (6) and is shaped such that, by causing the first telescopic element (4) to move relative to the second telescopic element (6) in a first direction (B), a first portion (18) of the latching element (12) is pivotally inserted into the recess (14), and a second portion (20) of the latching element (12) is pressed against the outer side (22) of the first telescopic element (4) from the outside.

2. The construction machinery according to claim 1, characterized in that, In the latched position, the first portion (18) of the latching element (12) is in the recess (14), and the second portion (20) of the latching element (12) presses against the first telescopic element (4) in such a way that the first telescopic element (4) can be locked in place in the second telescopic element (6).

3. The construction machinery according to claim 2, characterized in that, For the purpose of adjusting the first telescopic element (4) relative to the second telescopic element (6), the latching element (12) is pivotable to an adjustment position in which, on the one hand, the first portion (18) of the latching element (12) pivots out of the recess (14), and the second portion (20) of the latching element (12) does not press against the outer side (22) of the first telescopic element (4), so that the first telescopic element (4) can be guided with clearance in the second telescopic element (6).

4. The construction machinery according to claim 3, characterized in that, For the purpose of pivoting the latching element (12) from the latching position to the adjusting position, the first portion (18) of the latching element (12), the pivot axis (16) and the second portion (20) of the latching element (12) are arranged relative to each other in such a way that the first portion (18) of the latching element (12) has a profile such that by moving the first telescopic element (4) relative to the second telescopic element (6) in a second direction (C) opposite to the first direction (B), the first portion (18) of the latching element (12) pivots out of the recess (14) and pivots to the adjusting position.

5. The construction machinery according to claim 3, characterized in that, For the purpose of pivoting the latching element (12) from the adjustment position to the latching position, the first telescopic element (4) is capable of moving relative to the second telescopic element (6) in the first direction (B), and once the latching element (12) is at the height of the recess (14), the first portion (18) of the latching element (12) pivots into the recess (14) due to its own weight and / or due to the spring force of the spring element.

6. The construction machinery according to claim 1 or 2, characterized in that, An adjusting element (8) is connected to the latching element (12), through which the latching element (12) can pivot away from the first telescopic element (4) into a retracted position, in which the first portion (18) of the latching element (12) does not pivot into the recess (14) even during the movement of the first telescopic element (4) in the first direction (B).

7. The construction machinery according to claim 6, characterized in that, The adjusting element is a lever element.

8. The construction machinery according to claim 1 or 2, characterized in that, The first telescopic element (4) is movable in a first direction (B) substantially the same as the direction of gravity, such that in the latched position, the total weight of the first telescopic element (4) and the protective canopy connected thereto acts on the first portion (18) of the latching element (12) and causes the latching element (12) to pivot in such a direction that the second portion (20) of the latching element (12) presses against the outside of the first telescopic element (4).

9. The construction machinery according to claim 1 or 2, characterized in that, At least one guide element is provided in the second telescopic element (6), which guides the first telescopic element (4) in the second telescopic element (6).

10. The construction machinery according to claim 9, characterized in that, The first telescopic element (4) can be guided in the second telescopic element (6), and the clearance can be adjusted by at least one guide element.

11. The construction machinery according to claim 9, characterized in that, At least one guiding element is a sliding guide (50, 52) and / or a guide roller (54).

12. The construction machinery according to claim 1 or 2, characterized in that, The protective canopy (13) is positioned at an offset relative to the longitudinal axis of the first telescopic element (4).

13. The construction machinery according to claim 1 or 2, characterized in that, The first telescopic element (4) and / or the second telescopic element (6) are square tubes.

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