Get-off multistage supporting leg linkage telescopic device and overhead working truck

Abstract

The utility model belongs to the technical field of overhead working trucks, and particularly discloses a getting-off multistage supporting leg linkage telescopic device and an overhead working truck. The linkage telescopic device for the multi-stage landing legs of the lower vehicle is applied to the overhead working truck, the telescopic rod of the horizontal hydraulic cylinder stretches and retracts relative to the cylinder body, and the second-stage horizontal landing legs are directly driven to stretch and retract relative to the first-stage horizontal landing legs; meanwhile, the third-stage horizontal supporting leg is driven to stretch and retract relative to the second-stage horizontal supporting leg through cooperation of a first stretching rope and a first rope wheel and cooperation of a first retracting rope and a second rope wheel; meanwhile, a second extension rope and a third rope wheel are matched, and a second retraction rope and a fourth rope wheel are matched to drive the fourth-stage horizontal supporting leg to extend and retract relative to the third-stage horizontal supporting leg; thus, synchronous stretching and retracting of the second-stage to fourth-stage horizontal supporting legs are achieved, the stretching and retracting action efficiency of the supporting legs is high, the stretching and retracting action time is short, and the working efficiency of the overhead working truck is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerial work vehicles and relates to a multi-stage outrigger linkage telescopic device for an undercarriage and an aerial work vehicle. Background Art

[0002] Aerial work vehicles are special vehicles used to transport workers and equipment for aerial work. Aerial work vehicles generally include a chassis, a boom and a work platform. The lower end of the boom is connected to the chassis, and the upper end of the boom is connected to the work platform. After the boom is extended and raised, the work platform is moved to the high-altitude work area. At present, the lower legs of aerial work vehicles are generally set as multi-stage legs. The multi-stage legs extend outward and contact the ground to increase the support base of the aerial work vehicle, so as to improve the anti-overturning stability of the aerial work vehicle. At present, the multi-stage legs are generally extended and retracted section by section, and the extension and retraction action time is relatively long, which affects the operating efficiency of the aerial work vehicle. Utility Model Content

[0003] The utility model aims to provide a multi-stage outrigger linkage telescopic device for an undercarriage and an aerial work vehicle, so as to realize synchronous extension and retraction of outriggers at all levels and improve the efficiency of the extension and retraction of the outriggers.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A multi-stage leg linkage telescopic device for getting off a vehicle, comprising a first-stage horizontal leg, a second-stage horizontal leg, a third-stage horizontal leg, a fourth-stage horizontal leg, a vertical leg, a horizontal hydraulic cylinder, a first extension rope, a first retraction rope, a second extension rope and a second retraction rope;

[0006] The adjacent levels of horizontal legs can be relatively extended and retracted. The first level of horizontal legs is used to be arranged on the chassis of the lower vehicle, and the outer ends of the fourth level of horizontal legs are connected to the vertical legs.

[0007] The end of the telescopic rod of the horizontal hydraulic cylinder is provided with an assembly seat, the assembly seat is connected to the first-stage horizontal leg, and the cylinder body of the horizontal hydraulic cylinder is connected to the second-stage horizontal leg;

[0008] The assembly seat is equipped with an assembly rack, and the assembly rack is arranged to extend outward along the axial direction of each level of horizontal legs;

[0009] A first rope pulley is provided at one end of the cylinder body of the horizontal hydraulic cylinder away from the telescopic rod, a second rope pulley is provided at one end of the cylinder body of the horizontal hydraulic cylinder close to the telescopic rod, one end of the first extension rope is connected to the third-level horizontal leg, the first extension rope is connected to the assembly seat or the assembly frame after passing through the first rope pulley, one end of the first retracting rope is connected to the third-level horizontal leg, and the first retracting rope is connected to the end of the assembly frame after passing through the second rope pulley;

[0010] A third rope pulley is provided at the outer end of the third-level horizontal support leg, a fourth rope pulley is provided at the inner end of the third-level horizontal support leg, one end of the second extended rope is connected to the fourth-level horizontal support leg, the second extended rope passes around the third rope pulley and then is connected to the second-level horizontal support leg, one end of the second retracted rope is connected to the fourth-level horizontal support leg, and the second retracted rope passes around the fourth rope pulley and then is connected to the second-level horizontal support leg.

[0011] Preferably, a fifth rope pulley is provided at the end of the assembly frame, and the first retraction rope is connected to the assembly seat after passing around the second rope pulley and the fifth rope pulley in sequence.

[0012] Preferably, the cylinder body of the horizontal hydraulic cylinder is further provided with a wheel seat, and a roller is rotatably connected to the wheel seat.

[0013] Preferably, a guide frame is provided at the end of the cylinder body of the horizontal hydraulic cylinder away from the telescopic rod.

[0014] Preferably, the horizontal legs at each level are nested and arranged in sequence.

[0015] Preferably, the horizontal hydraulic cylinder is located inside each level of horizontal legs.

[0016] Preferably, the first extending rope, the first retracting rope, the second extending rope and the second retracting rope are all configured as steel wire ropes.

[0017] Preferably, a nylon slider is provided between any adjacent levels of horizontal legs.

[0018] Preferably, the vertical legs include vertical fixed legs, vertical movable legs, a vertical hydraulic cylinder and a base, the outer ends of the fourth-level horizontal legs are connected to the vertical fixed legs, the vertical movable legs are slidably matched with the vertical fixed legs, the vertical movable legs can be extended and retracted relative to the vertical fixed legs, the two ends of the vertical hydraulic cylinder are respectively connected to the vertical fixed legs and the vertical movable legs, and the base is arranged at the lower end of the vertical movable legs.

[0019] The invention discloses an aerial work vehicle, wherein the aerial work vehicle is provided with the above-mentioned multi-stage outrigger linkage telescopic device for getting off the vehicle.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] As described above, the utility model relates to a dismounted multi-stage outrigger linkage telescopic device, which is applied to aerial work vehicles, the telescopic rod of the horizontal hydraulic cylinder extends and retracts relative to the cylinder body, directly driving the second-stage horizontal outrigger to extend and retract relative to the first-stage horizontal outrigger; at the same time, the third-stage horizontal outrigger is extended relative to the second-stage horizontal outrigger by the cooperation of the first extension rope and the first rope pulley, and the third-stage horizontal outrigger is retracted relative to the second-stage horizontal outrigger by the cooperation of the first retraction rope and the second rope pulley; at the same time, the fourth-stage horizontal outrigger is extended relative to the third-stage horizontal outrigger by the cooperation of the second extension rope and the third rope pulley, and the fourth-stage horizontal outrigger is retracted relative to the third-stage horizontal outrigger by the cooperation of the second retraction rope and the fourth rope pulley; in this way, the synchronous extension and retraction of the second to fourth-stage horizontal outriggers is realized, the extension and retraction efficiency of the outriggers is high, the telescopic action time is short, and the operating efficiency of the aerial work vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 This is a front sectional view of the multi-stage outrigger linkage telescopic device for getting off a vehicle according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0025] Figure 3 This is a front cross-sectional view of the multi-stage outrigger linkage telescopic device for getting off a vehicle according to an embodiment of the utility model, after removing components such as the horizontal hydraulic cylinder;

[0026] Figure 4 It is a three-dimensional diagram of the horizontal hydraulic cylinder, assembly seat, assembly frame and other components of the embodiment of the utility model;

[0027] Figure 5 A three-dimensional diagram of the horizontal hydraulic cylinder, assembly seat and other components of the embodiment of the utility model;

[0028] Figure 6 It is a three-dimensional diagram of an assembly rack according to an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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.

[0034] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Example:

[0036] like Figures 1 to 6 As shown, the multi-stage leg linkage telescopic device for getting off the vehicle in this embodiment includes a first-stage horizontal leg, a second-stage horizontal leg 11, a third-stage horizontal leg 12, a fourth-stage horizontal leg 13, a vertical leg, a horizontal hydraulic cylinder 2, a first extension rope 31, a first retraction rope 32, a second extension rope 41 and a second retraction rope 42.

[0037] The horizontal legs of each level are nested in sequence, and the horizontal legs of adjacent levels can be extended or retracted relative to each other. Specifically, the second-level horizontal legs 11 can be extended or retracted relative to the first-level horizontal legs, the third-level horizontal legs 12 can be extended or retracted relative to the second-level horizontal legs 11, and the fourth-level horizontal legs 13 can be extended or retracted relative to the third-level horizontal legs 12.

[0038] The first-stage horizontal outrigger is used to be arranged on the lower chassis of the aerial work vehicle, and the outer end of the fourth-stage horizontal outrigger 13 is connected to the vertical outrigger.

[0039] The horizontal hydraulic cylinder 2 is located inside the horizontal legs at each level. The telescopic rod end of the horizontal hydraulic cylinder 2 is provided with an assembly seat 51, which is connected to the first-level horizontal legs, and the shaft sleeve 20 on the cylinder body of the horizontal hydraulic cylinder 2 is connected to the second-level horizontal legs 11 through the distribution shaft.

[0040] An assembly frame 52 is assembled on the assembly seat 51, and the assembly frame 52 is arranged to extend outward along the axial direction of each level of horizontal legs.

[0041] The assembly frame 52 is located below the cylinder body of the horizontal hydraulic cylinder 2 to support the cylinder body, and when the cylinder body of the horizontal hydraulic cylinder 2 is extended and retracted relative to the telescopic rod, the assembly frame 52 guides the movement process of the cylinder body.

[0042] The cylinder body of the horizontal hydraulic cylinder 2 is also provided with a wheel seat 21, and a roller 22 is rotatably connected to the wheel seat 21. In this way, the roller 22 rolls and contacts the inner wall of the horizontal legs at various levels, so that the horizontal hydraulic cylinder 2 can be stably reciprocated in the horizontal legs at various levels.

[0043] A guide frame 23 is provided at the end of the cylinder body of the horizontal hydraulic cylinder 2 away from the telescopic rod. In this way, when the horizontal hydraulic cylinder 2 moves outward, it is guided by the guide frame 23 to prevent the horizontal hydraulic cylinder 2 and its first rope wheel 61 and the fifth rope wheel 65 and other components from hitting the inner wall of each level of the horizontal legs and being damaged.

[0044] The end of the cylinder body of the horizontal hydraulic cylinder 2 away from the telescopic rod is provided with a first rope pulley 61, and the end of the cylinder body of the horizontal hydraulic cylinder 2 close to the telescopic rod is provided with a second rope pulley 62. One end of the first extension rope 31 is connected to the lower end of the third-level horizontal leg 12 via a pin, and the first extension rope 31 passes around the first rope pulley 61 and then connects to the assembly seat 51. One end of the first retracting rope 32 is connected to the lower end of the third-level horizontal leg 12 via a pin, and the first retracting rope 32 passes around the second rope pulley 62 and then connects to the end of the assembly frame 52.

[0045] The end of the assembly frame 52 is provided with a fifth rope wheel 65, and the first retracting rope 32 is connected to the assembly seat 51 after passing through the second rope wheel 62 and the fifth rope wheel 65 in sequence. In this way, the other ends of the first extension rope 31 and the first retracting rope 32 are arranged at the position of the assembly seat 51, which is convenient for assembling the first extension rope 31 and the first retracting rope 32, and also convenient for adjusting the tightness of the first extension rope 31 and the first retracting rope 32.

[0046] A third rope sheave 63 is provided on the outer end side wall of the third-level horizontal leg 12, and a fourth rope sheave 64 is provided on the inner end of the third-level horizontal leg 12. One end of the second extension rope 41 is connected to the lower end of the fourth-level horizontal leg 13 via a pin, and the second extension rope 41 is connected to the lower end of the second-level horizontal leg 11 after passing through the third rope sheave 63. One end of the second retracting rope 42 is connected to the lower end of the fourth-level horizontal leg 13 via a pin, and the second retracting rope 42 is connected to the upper end of the second-level horizontal leg 11 after passing through the fourth rope sheave 64.

[0047] The first extending rope 31, the first retracting rope 32, the second extending rope 41 and the second retracting rope 42 are all configured as steel wire ropes.

[0048] A nylon slider 14 is provided between any adjacent level horizontal legs. In this way, the wear degree between the adjacent level horizontal legs is reduced. When the extended rope or the retracted rope needs to pass through the nylon slider 14, a rope groove is provided on the nylon slider 14, and the extended rope or the retracted rope passes through the rope groove.

[0049] The vertical legs include a vertical fixed leg 71, a vertical movable leg 72, a vertical hydraulic cylinder and a base 73. The outer end of the fourth-level horizontal leg 13 is connected to the vertical fixed leg 71. The vertical movable leg 72 is nested in the vertical fixed leg 71. The vertical movable leg 72 slides with the vertical fixed leg 71. The vertical movable leg 72 can extend and retract relative to the vertical fixed leg 71. The two ends of the vertical hydraulic cylinder are respectively connected to the vertical fixed leg 71 and the vertical movable leg 72. A base 73 is set at the lower end of the vertical movable leg 72.

[0050] After the horizontal legs at each level are extended, the telescopic rod of the vertical hydraulic cylinder is extended relative to the cylinder body to drive the vertical movable legs 72 to extend relative to the vertical fixed legs 71 so that the base 73 contacts the ground.

[0051] An aerial work vehicle, the aerial work vehicle has an undercarriage chassis on which the undercarriage multi-stage outrigger linkage telescopic device of the embodiment is arranged.

[0052] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the multi-stage leg linkage telescopic device for disembarking of the utility model. The multi-stage leg linkage telescopic device for disembarking of the utility model is applied to an aerial work vehicle, and the telescopic rod of the horizontal hydraulic cylinder 2 is extended and retracted relative to the cylinder body, directly driving the second-stage horizontal leg 11 to extend and retract relative to the first-stage horizontal leg; at the same time, the third-stage horizontal leg 12 is extended relative to the second-stage horizontal leg 11 through the cooperation of the first extension rope 31 and the first rope wheel 61, and the third-stage horizontal leg 12 is retracted relative to the second-stage horizontal leg 11 through the cooperation of the first retraction rope 32 and the second rope wheel 62; at the same time, the fourth-stage horizontal leg 13 is extended relative to the third-stage horizontal leg 12 through the cooperation of the second extension rope 41 and the third rope wheel 63, and the fourth-stage horizontal leg 13 is retracted relative to the third-stage horizontal leg 12 through the cooperation of the second retraction rope 42 and the fourth rope wheel 64. In this way, the synchronous extension and retraction of the second to fourth level horizontal outriggers can be achieved, the extension and retraction of the outriggers are more efficient, the retraction and extension time is shorter, and the operating efficiency of the aerial work vehicle is improved.

[0053] Of course, the above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model and should be protected by the utility model.

Claims

1. A multi-stage outrigger linkage telescopic device for getting off a vehicle, characterized in that: It includes a first-level horizontal outrigger, a second-level horizontal outrigger, a third-level horizontal outrigger, a fourth-level horizontal outrigger, a vertical outrigger, a horizontal hydraulic cylinder, a first extension rope, a first retraction rope, a second extension rope and a second retraction rope; The adjacent levels of horizontal legs can be relatively extended and retracted. The first level of horizontal legs is used to be arranged on the chassis of the lower vehicle, and the outer ends of the fourth level of horizontal legs are connected to the vertical legs. The end of the telescopic rod of the horizontal hydraulic cylinder is provided with an assembly seat, the assembly seat is connected to the first-stage horizontal leg, and the cylinder body of the horizontal hydraulic cylinder is connected to the second-stage horizontal leg; The assembly seat is equipped with an assembly rack, and the assembly rack is arranged to extend outward along the axial direction of each level of horizontal legs; A first rope pulley is provided at one end of the cylinder body of the horizontal hydraulic cylinder away from the telescopic rod, a second rope pulley is provided at one end of the cylinder body of the horizontal hydraulic cylinder close to the telescopic rod, one end of the first extension rope is connected to the third-level horizontal leg, the first extension rope is connected to the assembly seat or the assembly frame after passing through the first rope pulley, one end of the first retracting rope is connected to the third-level horizontal leg, and the first retracting rope is connected to the end of the assembly frame after passing through the second rope pulley; A third rope pulley is provided at the outer end of the third-level horizontal support leg, a fourth rope pulley is provided at the inner end of the third-level horizontal support leg, one end of the second extended rope is connected to the fourth-level horizontal support leg, the second extended rope passes around the third rope pulley and then is connected to the second-level horizontal support leg, one end of the second retracted rope is connected to the fourth-level horizontal support leg, and the second retracted rope passes around the fourth rope pulley and then is connected to the second-level horizontal support leg.

2. The multi-stage leg linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: A fifth rope pulley is disposed at the end of the assembly frame, and the first retraction rope is connected to the assembly seat after passing through the second rope pulley and the fifth rope pulley in sequence.

3. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: The cylinder body of the horizontal hydraulic cylinder is also provided with a wheel seat, and a roller is rotatably connected to the wheel seat.

4. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: A guide frame is arranged at the end of one end of the cylinder body of the horizontal hydraulic cylinder away from the telescopic rod.

5. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: The horizontal legs at each level are nested and arranged in sequence.

6. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 5, characterized in that: The horizontal hydraulic cylinder is located inside each level of the horizontal legs.

7. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: The first extending rope, the first retracting rope, the second extending rope and the second retracting rope are all configured as steel wire ropes.

8. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: Nylon sliders are provided between the horizontal legs of any adjacent levels.

9. The multi-stage outrigger linkage telescopic device for getting off a vehicle according to claim 1, characterized in that: The vertical legs include vertical fixed legs, vertical movable legs, a vertical hydraulic cylinder and a base. The outer ends of the fourth-level horizontal legs are connected to the vertical fixed legs. The vertical movable legs are slidably matched with the vertical fixed legs. The vertical movable legs can be extended and retracted relative to the vertical fixed legs. The two ends of the vertical hydraulic cylinder are respectively connected to the vertical fixed legs and the vertical movable legs. The base is arranged at the lower end of the vertical movable legs.

10. An aerial work vehicle, characterized in that: The aerial work vehicle is provided with the multi-stage outrigger linkage telescopic device for getting off the vehicle as described in any one of claims 1 to 9.

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