Telescopic boom and engineering machinery

Abstract

The utility model provides a telescopic boom and engineering machinery, the telescopic boom comprises a boom assembly, a drag chain, a butt joint mechanism and a movable supporting mechanism, the boom assembly comprises a basic boom and a plurality of telescopic booms connected in sequence; the fixed end of the drag chain is connected with the basic arm, the movable end of the drag chain is connected with the telescopic arm at the outermost end, and the movable end of the drag chain can move along with the telescopic arm; the docking mechanism is mounted on the drag chain; the movable supporting mechanism is used for being switched between an initial state and a supporting state in a reciprocating mode relative to the arm frame assembly under abutting and pushing of the butt joint mechanism, the movable supporting mechanism in the initial state is limited to the basic arm, and the movable supporting mechanism in the supporting state is in butt joint with the butt joint mechanism and is supported on the telescopic arm in a sliding mode. According to the telescopic arm frame, the drag chain can be supported through the movable supporting mechanism in the process that the drag chain moves along with the telescopic arm, and the situation that the telescopic arm frame cannot normally operate due to the fact that the drag chain oversteps and collapses can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a telescopic boom and engineering machinery. Background Art

[0002] In a telescopic boom vehicle, the power of the dismounting device needs to be transmitted to the boom head, and reels and drag chains are often used to lay out pipelines, including but not limited to hydraulic pipes, wires, material pipes, air pipes, etc. For example, a branch trimmer with a telescopic boom has a small arm, a swing cylinder, a sawing clamp, etc. at the front end of the telescopic boom. There are more than ten hydraulic pipelines, wires, material pipes, and air pipes to the front end of the telescopic boom, and a drag chain with a large cross-section must be selected to meet the layout requirements.

[0003] Due to the heavy weight of the drag chain and the large number of pipelines inside the drag chain, the total weight of the drag chain per unit meter is heavy. In addition, the arm travel is long and the span of the fixed ends of the drag chain is large, which can easily cause the drag chain to sag seriously in the middle, posing a great safety risk and affecting the normal operation of the branch pruning vehicle, which cannot meet the design requirements. Utility Model Content

[0004] The main purpose of the utility model is to provide a telescopic boom and engineering machinery, aiming to solve the technical problem that the drag chain is easy to fall down in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a telescopic boom, which includes: a boom assembly, including a basic arm and a plurality of telescopic arms connected in sequence; a drag chain, a fixed end connected to the basic arm, and a movable end connected to the telescopic arm at the outermost end, and the movable end of the drag chain can move with the telescopic arm; a docking mechanism installed on the drag chain; a movable supporting mechanism, which is used to reciprocate between an initial state and a supporting state relative to the boom assembly under the push of the docking mechanism, the movable supporting mechanism in the initial state is limited to the basic arm, and the movable supporting mechanism in the supporting state is docked with the docking mechanism and slidably supported on the telescopic arm.

[0006] In an embodiment of the utility model, the movable support mechanism includes: a sliding support member extending along the width direction of the arm assembly, the sliding support member being used to be laterally overlapped on the upper surface of the telescopic arm; a movable connecting member installed at the end of the sliding support member, and the docking mechanism being used to connect or detach from the movable connecting member under the drive of the drag chain.

[0007] In an embodiment of the utility model, the movable support mechanism further comprises a movable plug-in block mounted on the sliding support member, and the tail portion of the basic arm is provided with a plug-in slot for movable plugging with the movable plug-in block.

[0008] In an embodiment of the utility model, the movable plug block is rotatably mounted on the sliding support member; and / or the movable plug block is wedge-shaped, and the insertion groove is a wedge-shaped groove.

[0009] In an embodiment of the utility model, the movable support mechanism further comprises a guide roller mounted on the sliding support member, and the guide roller is used for rolling contact cooperation with the arm assembly.

[0010] In the embodiment of the utility model, the length of the sliding support is a, the width of the arm assembly is b, the width of the drag chain is c, and a>b+c.

[0011] In an embodiment of the utility model, the movable connecting member is a hook and the movable connecting member is provided with a hook groove for the docking mechanism to extend into.

[0012] In an embodiment of the utility model, the docking mechanism includes: a connecting frame, which is mounted outside the drag chain and connected to the drag chain; a drag chain support shaft, which is installed on the connecting frame and extends along the width direction of the drag chain, and the drag chain support shaft is used to be movably connected to the movable supporting mechanism.

[0013] In an embodiment of the utility model, the docking mechanism is installed at the middle part of the drag chain along the length direction of the drag chain.

[0014] The utility model also provides an engineering machine, which comprises the telescopic boom as described above.

[0015] Through the above technical solution, the telescopic boom provided by the embodiment of the utility model has the following beneficial effects:

[0016] When the telescopic arm of the boom assembly extends relative to the basic arm, the movable end of the drag chain moves forward with the telescopic arm, and the docking mechanism installed on the drag chain moves synchronously with the drag chain. During the movement of the docking mechanism, the docking structure can push and dock with the movable supporting mechanism, so that the movable supporting mechanism in the initial state and limitedly connected to the basic arm can be separated from the basic arm, and the movable supporting mechanism switches to a supporting state and is supported on the telescopic arm. Under the pushing of the docking mechanism, the movable supporting mechanism slides relative to the telescopic arm, and the movable supporting mechanism is supported on the telescopic arm and can bear the load of the drag chain and the docking mechanism. When the telescopic arm of the boom assembly retracts relative to the basic arm, the docking mechanism moves synchronously with the drag chain and can drive the movable supporting mechanism to move relative to the basic boom until the movable supporting mechanism is reset to the initial position. The movable supporting mechanism can switch to the initial state and be limitedly connected to the basic arm, so as to avoid the telescopic arm and prevent the telescopic arm from being unable to retract. The telescopic boom of the utility model can support the drag chain through the movable supporting mechanism during the movement of the drag chain with the telescopic arm through the cooperation among the boom assembly, the drag chain, the docking mechanism and the movable supporting mechanism, so as to avoid the drag chain from sagging due to the huge span and causing the situation that the normal operation cannot be carried out. At the same time, the movable supporting mechanism in the initial state is limited to the basic arm, which can avoid the situation that interferes with the telescopic arm and ensure that the boom assembly operates more stably.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of a telescopic boom according to an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of a telescopic boom according to an embodiment of the utility model;

[0021] Figure 3 is a schematic cross-sectional view of a portion of the structure of a telescopic boom according to another embodiment of the utility model;

[0022] Figure 4 It is a partial structural schematic diagram of a telescopic boom according to an embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the supporting state of the telescopic arm according to one embodiment of the utility model.

[0024] Description of Reference Numerals

[0025] Label Name Label Name

[0026] 100 Telescopic arm 42 Drag chain support shaft

[0027] 1 Basic arm 5 Movable support mechanism

[0028] 11 fixed block 51 sliding support

[0029] 12 Plug slot 52 Active connector

[0030] 2 Telescopic arm 521 Hook slot

[0031] 3 Drag chain 53 movable plug

[0032] 4 Docking mechanism 54 Guide roller

[0033] 41 Connecting frame DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] The telescopic boom according to the present invention is described below with reference to the accompanying drawings.

[0036] like Figures 1 to 5 As shown, in an embodiment of the utility model, the telescopic boom 100 includes a boom assembly, a drag chain 3, a docking mechanism 4 and a movable supporting mechanism 5, the boom assembly includes a basic arm 1 and a plurality of telescopic arms 2 connected in sequence; the fixed end of the drag chain 3 is connected to the basic arm 1, and the movable end is connected to the telescopic arm 2 at the outermost end, and the movable end of the drag chain 3 can move with the telescopic arm 2; the docking mechanism 4 is installed on the drag chain 3; the movable supporting mechanism 5 is used to reciprocate between the initial state and the supporting state relative to the boom assembly under the push of the docking mechanism 4, the movable supporting mechanism 5 in the initial state is limited to the basic arm 1, and the movable supporting mechanism 5 in the supporting state is docked with the docking mechanism 4 and slidably supported on the telescopic arm 2.

[0037] It can be understood that in this embodiment, the length direction of the arm assembly is the front-to-back direction, the width direction of the arm assembly is the left-to-right direction, and the drag chain 3 is arranged on the outside of the arm assembly along the width direction of the arm assembly. The arm assembly in this embodiment is a telescopic arm applied to a branch pruning vehicle, and the telescopic structure between the telescopic arm 2 and the basic arm 1 can adopt the telescopic components in the prior art.

[0038] When the telescopic arm 2 of the boom assembly extends relative to the basic arm 1, the movable end of the drag chain 3 moves forward with the telescopic arm 2, and the docking mechanism 4 installed on the drag chain 3 moves synchronously with the drag chain 3. During the movement of the docking mechanism 4, the docking structure can push and dock with the movable supporting mechanism 5, so that the movable supporting mechanism 5 in the initial state and limitedly connected to the basic arm 1 can be separated from the basic arm 1, and the movable supporting mechanism 5 switches to the supporting state and is supported on the telescopic arm 2. Under the pushing of the docking mechanism 4, the movable supporting mechanism 5 slides relative to the telescopic arm 2, and the movable supporting mechanism 5 is supported on the telescopic arm 2, which can bear the load of the drag chain 3 and the docking mechanism 4. When the telescopic arm 2 of the boom assembly retracts relative to the basic arm 1, the docking mechanism 4 moves synchronously with the drag chain 3, and can drive the movable supporting mechanism 5 to move relative to the basic arm 1 until the movable supporting mechanism 5 is reset to the initial position. The movable supporting mechanism 5 can switch to the initial state and be limitedly connected to the basic arm 1, which can avoid the telescopic arm 2 and prevent the telescopic arm 2 from being unable to retract. The telescopic boom 100 in this embodiment can support the drag chain 3 through the movable support mechanism 5 when the drag chain 3 moves with the telescopic arm 2 through the cooperation among the boom assembly, the drag chain 3, the docking mechanism 4 and the movable support mechanism 5, so as to avoid the drag chain 3 from sagging due to the huge span, which makes the telescopic boom 100 unable to operate normally. At the same time, the movable support mechanism 5 in the initial state is limited to the basic arm 1 to avoid interfering with the telescopic arm 2, which can ensure that the boom assembly operates more stably.

[0039] In one embodiment, the movable support mechanism 5 includes a sliding support member 51 and a movable connecting member 52. The sliding support member 51 extends along the width direction of the arm assembly. The sliding support member 51 is used to overlap the upper surface of the telescopic arm 2 in a transverse manner. The movable connecting member 52 is installed at the end of the sliding support member 51. The docking mechanism 4 is used to connect or disconnect the movable connecting member 52 under the drive of the drag chain 3. The sliding support member 51 in this embodiment can be in the shape of a long pin rod, which can be conveniently overlapped on the upper surface of the telescopic arm 2. The docking mechanism 4 can drive the sliding support member 51 to move by connecting the movable connecting member 52. Under the push of the docking mechanism 4, the movable connecting member 52 can make the sliding support member 51 detach from the basic arm 1 and support the upper surface of the telescopic arm 2. The docking mechanism 4 continues to drive the sliding support member 51 to move. The sliding support member 51 and the telescopic arm 2 are in sliding contact and cooperation. During the sliding process of the sliding support member 51, the telescopic arm 2 can bear the weight of the drag chain 3 and the docking mechanism 4 throughout the entire process.

[0040] It should be noted that the movable support mechanism 5 also includes a movable plug block 53 installed on the sliding support member 51, and the tail of the basic arm 1 is provided with a plug slot 12 for movable plugging with the movable plug block 53. In this embodiment, the front end of the basic arm 1 is detachably connected with a fixed block 11, and the plug slot 12 is provided on the fixed block 11. The movable plug block 53 can be separated from or plugged into the fixed block 11 under the drive of the docking mechanism 4. In this embodiment, the structure is simple and easy to manufacture and assemble by means of movable plugging.

[0041] like Figure 1 As shown, in the embodiment of the utility model, the movable plug block 53 is rotatably mounted on the sliding support 51, and the movable plug block 53 is wedge-shaped, and the plug-in slot 12 is a wedge-shaped slot. The wedge-shaped slot in this embodiment opens forward and is tilted upward, which can facilitate the movable plug block 53 to be plugged into the wedge-shaped slot, and the cross-sectional size of the wedge-shaped slot gradually increases from the back to the front, which can guide the movable plug block 53. The movable plug block 53 can rotate relative to the sliding support 51. When the telescopic arm 2 retracts, the movable plug block 53 can automatically adjust the plug-in angle, which improves the efficiency of resetting the movable plug block 53.

[0042] In one embodiment, the movable support mechanism 5 further includes a guide roller 54 mounted on the sliding support member 51, and the guide roller 54 is used for rolling contact with the arm assembly. Figure 2 As shown, the guide roller 54 in this embodiment can be connected to the sliding support 51 through a connecting rod, and the guide roller 54 is located at the end of the sliding support 51 away from the detachment. In the process of the sliding support 51 moving with the drag chain 3, the guide roller 54 and the telescopic arm 2 can perform rolling contact cooperation, and can guide the movement trajectory of the sliding support 51, ensuring that the sliding support 51 moves along the extension direction of the telescopic arm 2, thereby improving the support stability of the movable support mechanism 5.

[0043] It can be understood that the length of the sliding support member 51 is a, the width of the arm assembly is b, and the width of the drag chain 3 is c, and a>b+c. The left and right ends of the sliding support member 51 in this embodiment protrude relative to the arm assembly and the drag chain 3, and the number of the movable connecting members 52 is at least two. In one embodiment, two movable connecting members 52 are arranged on the sliding support member 51 along the left and right directions, and the two movable connecting members 52 are arranged on the left and right sides of the drag chain 3. During the movement of the drag chain 3, the drag chain support shaft 42 of the docking mechanism 4 can dock with the two movable connecting members 52 at the same time. Through the cooperation of the two movable connecting members 52, the docking stability between the docking mechanism 4 and the movable support mechanism 5 can be improved.

[0044] like Figure 1 and Figure 4As shown, the movable connecting member 52 is a hook and is provided with a hook groove 521 for the docking mechanism 4 to extend into. The drag chain support shaft 42 can extend into the hook groove 521 and drive the sliding support member 51 to move by pushing the hook. The hook in this embodiment can be rotatably mounted on the sliding support member 51 by a pin shaft. When the movable plug block 53 is plugged into the plug slot 12, the movable connecting member 52 can rotate relative to the sliding support member 51 under the push-pushing action of the basic arm 1, which can facilitate the disengagement of the docking mechanism 4 and the movable connecting member 52.

[0045] In one embodiment, the docking mechanism 4 includes a connecting frame 41 and a drag chain support shaft 42. The connecting frame 41 is sleeved outside the drag chain 3 and connected to the drag chain 3. The drag chain support shaft 42 is installed on the connecting frame 41 and extends along the width direction of the drag chain 3. The drag chain support shaft 42 is used to be movably connected to the movable support mechanism 5. Figure 3 As shown, the drag chain support shaft 42 in this embodiment is in the shape of a long rod, the connecting frame 41 is U-shaped and opens downward, the left and right ends of the drag chain support shaft 42 and the connecting frame 41 are connected and located at the lower end of the connecting frame 41, the width of the drag chain support shaft 42 is greater than the width of the drag chain 3, and the left and right ends of the drag chain support shaft 42 protrude relative to the drag chain 3, which can facilitate the active connection between the drag chain support shaft 42 and the movable support mechanism 5.

[0046] In another embodiment, the docking mechanism 4 is installed in the middle of the drag chain 3 along the length direction of the drag chain 3. Figure 5 As shown, the docking mechanism 4 in this embodiment is located in the middle position of the drag chain 3 along the front-to-back direction, and the docking mechanism 4 and the drag chain 3 can be fixedly connected by connecting parts such as screws and bolts. During the movement of the drag chain 3, the docking mechanism 4 moves with the drag chain 3, and the relative position between the docking mechanism 4 and the drag chain 3 remains unchanged. The docking mechanism 4 is always located in the middle of the drag chain 3. When the docking mechanism 4 and the movable supporting mechanism 5 are docked and the span of the drag chain 3 is large, the docking mechanism 4 supports the middle of the drag chain 3 through the telescopic arm 2, which can effectively prevent the middle of the drag chain 3 from sagging.

[0047] The utility model also provides an engineering machine, which includes the telescopic boom 100 as described above. The specific structure of the telescopic boom 100 refers to the above embodiment. Since the engineering machine adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. In one embodiment, the engineering machine can be applied to a tree branch pruning vehicle.

[0048] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A telescopic boom (100), characterized in that: The telescopic boom (100) comprises: A boom assembly comprises a basic boom (1) and a plurality of telescopic booms (2) connected in sequence; A drag chain (3), a fixed end of which is connected to the basic arm (1), and a movable end of which is connected to the telescopic arm (2) at the outermost end, and the movable end of the drag chain (3) can move with the telescopic arm (2); A docking mechanism (4) installed on the drag chain (3); The movable support mechanism (5) is used to switch back and forth between an initial state and a supporting state relative to the arm support assembly under the push of the docking mechanism (4); the movable support mechanism (5) in the initial state is limited on the basic arm (1); and the movable support mechanism (5) in the supporting state is docked with the docking mechanism (4) and slidably supported on the telescopic arm (2).

2. The telescopic boom according to claim 1, characterized in that: The movable supporting mechanism (5) comprises: A sliding support member (51) extending along the width direction of the arm support assembly, the sliding support member (51) being used to be laterally overlapped on the upper surface of the telescopic arm (2); The movable connecting member (52) is installed at the end of the sliding support member (51), and the docking mechanism (4) is used to connect to or disconnect from the movable connecting member (52) under the drive of the drag chain (3).

3. The telescopic boom according to claim 2, characterized in that: The movable support mechanism (5) further comprises a movable plug block (53) mounted on the sliding support member (51), and a plug slot (12) for movable plugging with the movable plug block (53) is provided at the tail of the basic arm (1).

4. The telescopic boom according to claim 3, characterized in that: The movable plug block (53) is rotatably mounted on the sliding support member (51); and / or, The movable plug block (53) is wedge-shaped, and the plug-in slot (12) is a wedge-shaped slot.

5. The telescopic boom according to claim 2, characterized in that: The movable support mechanism (5) further comprises a guide roller (54) mounted on the sliding support member (51), and the guide roller (54) is used for rolling contact cooperation with the arm support assembly.

6. The telescopic boom according to claim 2, characterized in that: The length of the sliding support member (51) is a, the width of the arm assembly is b, the width of the drag chain (3) is c, and a>b+c.

7. The telescopic boom according to claim 2, characterized in that: The movable connecting member (52) is a hook and the movable connecting member (52) is provided with a hook groove (521) for the docking mechanism (4) to extend into.

8. The telescopic boom according to any one of claims 1 to 7, characterized in that: The docking mechanism (4) comprises: A connecting frame (41) is sleeved outside the drag chain (3) and connected to the drag chain (3); A drag chain support shaft (42) is mounted on the connecting frame (41) and extends along the width direction of the drag chain (3). The drag chain support shaft (42) is used to be movably connected to the movable supporting mechanism (5).

9. The telescopic boom according to any one of claims 1 to 7, characterized in that: The docking mechanism (4) is installed at the middle part of the drag chain (3) along the length direction of the drag chain (3).

10. An engineering machine, characterized in that: The engineering machinery comprises the telescopic boom (100) according to any one of claims 1 to 9.

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