H-shaped supporting leg for overhead working truck

Abstract

The utility model provides an H-shaped supporting leg for an overhead working truck, which relates to the technical field of overhead working trucks and comprises a double-end hydraulic cross beam, a first series synchronous oil way, a push-pull hydraulic cylinder, a second series synchronous oil way, a connecting structure, a longitudinal hydraulic mechanism, a third series synchronous oil way and a triggering structure. According to the device, a push-pull hydraulic cylinder is firstly started to push a double-end hydraulic cross beam to extend outwards, a trigger structure in the push-pull hydraulic cylinder is triggered after the push-pull hydraulic cylinder is completely started, and after triggering, an external controller controls hydraulic cylinders on the two sides of the double-end hydraulic cross beam to be started to push longitudinal hydraulic mechanisms on the two sides to extend outwards; after the two ends of the double-end hydraulic cross beam are completely started, the triggering structure in the double-end hydraulic cross beam is triggered, the external controller controls the longitudinal hydraulic mechanism to be started to support the ground after triggering, the size of the H-shaped supporting leg is transversely and longitudinally expanded after operation, the span of the H-shaped supporting leg is increased, the size is small when the device is not unfolded, and the device can be installed on an overhead working truck with the small specification.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work vehicles, in particular to an H-shaped outrigger for an aerial work vehicle. Background Art

[0002] When working at high altitudes, the aerial work vehicle needs to improve the lifting capacity of the crane and increase the stability of the whole machine. The base frame of the crane is equipped with retractable and telescopic outriggers. The outriggers of the wheeled crane are divided into frog-type outriggers, H-type outriggers, X-type outriggers and radial outriggers according to their structure.

[0003] Most of the current H-type outriggers are driven by oil cylinders. Some small-sized aerial work vehicles have limited installation space. Although the existing H-type outriggers have a large span, they are large in size and are not suitable for installation on small-sized aerial work vehicles. Utility Model Content

[0004] The utility model aims to provide an H-type outrigger for an aerial work vehicle, which solves the technical problem that an aerial work vehicle with a smaller specification is not suitable for installing an H-type outrigger with a large span.

[0005] The utility model provides an H-shaped outrigger for an aerial work vehicle, comprising:

[0006] A double-headed hydraulic crossbeam, the oil inlet and outlet ends on both sides of which are fixedly connected with a first series synchronous oil circuit;

[0007] The left and right sides of the rear wall of the double-head hydraulic crossbeam are detachably fixedly equipped with push-pull hydraulic cylinders, and the oil inlet and outlet ends of the push-pull hydraulic cylinders on both sides are fixedly connected with a second series synchronous oil circuit;

[0008] The rear end of the push-pull hydraulic cylinder is fixedly equipped with a connecting structure, and the connecting structure is fixedly connected to the frame of the aerial work vehicle;

[0009] Both ends of the double-headed hydraulic crossbeam are detachably and fixedly equipped with longitudinal hydraulic mechanisms, and the oil inlet and outlet ends of the longitudinal hydraulic mechanisms on both sides are fixedly connected with a third series synchronous oil circuit;

[0010] The trigger structures are installed on both sides of the double-head hydraulic crossbeam and in the push-pull hydraulic cylinder;

[0011] The trigger structure of the push-pull hydraulic cylinder is activated, triggering the double-head hydraulic crossbeam to start;

[0012] The trigger structures on both sides of the double-head hydraulic cross beam are activated, triggering the longitudinal hydraulic mechanisms on both sides to start.

[0013] As a further optimization solution, in order to realize the telescopic movement of the left and right ends of the double-headed hydraulic beam, the double-headed hydraulic beam includes:

[0014] A fixed block, the left and right sides of which are symmetrically and detachably fixedly equipped with transverse hydraulic cylinders;

[0015] The longitudinal hydraulic mechanism is detachably fixedly mounted on the telescopic end of the transverse hydraulic cylinder on the same side;

[0016] The telescopic end of the push-pull hydraulic cylinder is detachably fixedly assembled on the rear wall of the transverse hydraulic cylinder on the same side.

[0017] As a further optimization scheme, in order to realize the telescopic operation, the two sides inside the double-headed hydraulic beam, the push-pull hydraulic cylinder and the longitudinal hydraulic mechanism have the same structure, and the push-pull hydraulic cylinder includes:

[0018] The installation tube has a sealing design at the rear end;

[0019] The hydraulic cylinder body has a rear end fixedly mounted on the rear wall of the inner cavity of the mounting cylinder;

[0020] A connecting rod is slidably inserted into the open end of the installation cylinder, and the front end of the connecting rod is detachably fixedly assembled with the rear wall of the horizontal hydraulic cylinder on the same side;

[0021] The telescopic front end of the hydraulic cylinder body is fixedly connected to the rear end of the connecting rod.

[0022] As a further optimization scheme, in order to start the corresponding hydraulic cylinder by contact triggering, the trigger structure is assembled in the position between the mounting cylinder and the rear end of the connecting rod, and the trigger structure includes:

[0023] A sliding installation cavity is provided on the inner wall of the installation tube;

[0024] A piston block is slidably mounted in the sliding mounting cavity;

[0025] A contact switch is glued and fixed to the front edge of the piston block;

[0026] The hydraulic cylinder body pushes the piston block to drive the contact switch to contact the front wall of the sliding installation cavity to trigger, and the contact switch is electrically connected to an external controller;

[0027] The external controller is electrically connected to the two sides of the double-head hydraulic beam, the push-pull hydraulic cylinder and the longitudinal hydraulic mechanism respectively.

[0028] As a further optimization scheme, in order to achieve synchronization of the hydraulic cylinders on both sides of the connection, the first series synchronization oil circuit, the second series synchronization oil circuit and the third series synchronization oil circuit have the same structure, and the second series synchronization oil circuit includes:

[0029] A liquid inlet pipe, which is fixedly connected to the liquid inlet end of the push-pull hydraulic cylinder on the left side;

[0030] A connecting pipe is fixedly connected between the liquid outlet end of the push-pull hydraulic cylinder and the liquid inlet end of the push-pull hydraulic cylinder on the right side;

[0031] The liquid outlet end of the push-pull hydraulic cylinder on the right is fixedly connected with a liquid outlet pipe.

[0032] As a further optimization scheme, in order to facilitate the disassembly and installation of the push-pull hydraulic cylinder and the frame of the aerial work vehicle, the connection structure includes:

[0033] A connecting plate, which is welded to the rear end of the push-pull hydraulic cylinder;

[0034] Fixing bolts are fixedly mounted between the connecting plate and the frame of the aerial work vehicle.

[0035] As a further optimization scheme, in order to improve the connection strength between the two ends of the double-headed hydraulic beam and the longitudinal hydraulic mechanism on the same side, and between the front end of the push-pull hydraulic cylinder and the double-headed hydraulic beam, the two ends of the double-headed hydraulic beam and the longitudinal hydraulic mechanism on the same side, and between the front end of the push-pull hydraulic cylinder and the double-headed hydraulic beam can be removably and fixedly equipped with a reinforced connection structure.

[0036] As a further optimization solution, in order to ensure the strength of the connection structure, the reinforced connection structure is specifically triangular steel.

[0037] As a further optimization scheme, in order to improve the support stability, the lower end of the longitudinal hydraulic mechanism is fixedly equipped with a support seat, which includes:

[0038] A conical seat, the smaller end of which is welded to the lower end of the longitudinal hydraulic mechanism;

[0039] A support plate is welded to the larger end of the conical seat, and the area of ​​the bottom surface of the support plate is larger than the area of ​​the bottom surface of the conical seat.

[0040] As a further optimization solution, in order to achieve an anti-slip effect, a rubber pad is adhered and fixed to the bottom surface of the support plate.

[0041] The utility model provides an H-type outrigger for an aerial work vehicle through improvement, which has the following improvements and advantages compared with the prior art:

[0042] The device first starts the push-pull hydraulic cylinder to push the double-headed hydraulic beam to extend outward. After the push-pull hydraulic cylinder is fully started, the trigger structure inside it is triggered. After the trigger, the external controller controls the hydraulic cylinders on both sides of the double-headed hydraulic beam to start, pushing the longitudinal hydraulic mechanisms on both sides to extend outward. After both ends of the double-headed hydraulic beam are fully started, the trigger structure inside it is triggered. After the trigger, the external controller controls the longitudinal hydraulic mechanism to start supporting the ground. After the above operations, the volume of the H-shaped outriggers is expanded laterally and longitudinally, increasing its span. When the device is not unfolded, the volume is small and can be installed on aerial work vehicles with smaller specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a schematic diagram of the structure of the utility model;

[0045] Figure 2 It is a structural schematic diagram of the push-pull hydraulic cylinder and the connection structure of the utility model;

[0046] Figure 3 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0047] Figure 4 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0048] Figure 5 This is a schematic diagram of the support base structure of the utility model.

[0049] Description of reference numerals:

[0050] 1-double-headed hydraulic crossbeam, 11-fixed block, 12-lateral hydraulic cylinder, 2-push-pull hydraulic cylinder, 21-installation cylinder, 22-connecting rod, 23-hydraulic cylinder body, 3-second series synchronous oil circuit, 31-liquid inlet pipe, 32-connecting pipe, 33-liquid outlet pipe, 4-longitudinal hydraulic mechanism, 5-third series synchronous oil circuit, 6-support seat, 61-conical seat, 62-support plate, 63-rubber pad, 7-reinforced connection structure, 8-connection structure, 81-connecting plate, 82-fixing bolt, 9-trigger structure, 91-sliding installation cavity, 92-piston block, 93-contact switch, 10-first series synchronous oil circuit. DETAILED DESCRIPTION

[0051] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0053] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0054] See also Figure 1-5 The utility model provides a technical solution: an H-shaped outrigger for an aerial work vehicle, comprising:

[0055] The double-headed hydraulic beam 1 has a first series synchronous oil circuit 10 fixedly connected between the oil inlet and outlet ends on both sides. After the series synchronization of the first series synchronous oil circuit 10, the hydraulic cylinders on both sides of the double-headed hydraulic beam 1 can operate synchronously, and the compensation valves provided by the hydraulic cylinders compensate for the accumulated error.

[0056] The left and right sides of the rear wall of the double-head hydraulic crossbeam 1 are detachably fixedly equipped with push-pull hydraulic cylinders 2. The oil inlet and outlet ends of the push-pull hydraulic cylinders 2 on both sides are fixedly connected with a second series synchronous oil circuit 3. After the series synchronization of the second series synchronous oil circuit 3, the push-pull hydraulic cylinders 2 on both sides can run synchronously. The compensation valve of the hydraulic cylinder compensates for the accumulated error.

[0057] The rear end of the push-pull hydraulic cylinder 2 is fixedly equipped with a connecting structure 8, and the connecting structure 8 is fixedly connected to the frame of the aerial work vehicle to achieve a fixed connection between the device and the aerial work vehicle;

[0058] Both ends of the double-headed hydraulic crossbeam 1 are detachably fixedly equipped with longitudinal hydraulic mechanisms 4, and the oil inlet and outlet ends of the longitudinal hydraulic mechanisms 4 on both sides are fixedly connected with a third series synchronous oil circuit 5. After the series synchronization of the third series synchronous oil circuit 5, the longitudinal hydraulic mechanisms 4 on both sides can operate synchronously, and the compensation valve of the hydraulic cylinder compensates for the accumulated error;

[0059] The trigger structure 9 is installed on both sides of the double-head hydraulic beam 1 and in the push-pull hydraulic cylinder 2;

[0060] The trigger structure 9 of the push-pull hydraulic cylinder 2 is activated, triggering the double-headed hydraulic beam 1 to start;

[0061] The trigger structures 9 on both sides of the double-headed hydraulic cross beam 1 are activated, triggering the longitudinal hydraulic mechanisms 4 on both sides to start.

[0062] First, open the push-pull hydraulic cylinder 2 to push the double-headed hydraulic beam 1 to extend outward. After the push-pull hydraulic cylinder 2 is fully started, the trigger structure 9 inside it is triggered. After triggering, the external controller controls the hydraulic cylinders on both sides of the double-headed hydraulic beam 1 to start, pushing the longitudinal hydraulic mechanisms 4 on both sides to extend outward. After both ends of the double-headed hydraulic beam 1 are fully started, the trigger structure 9 inside it is triggered. After triggering, the external controller controls the longitudinal hydraulic mechanisms 4 to start supporting the ground.

[0063] In some embodiments, in order to realize the extension and retraction of the left and right ends of the double-headed hydraulic beam 1, the double-headed hydraulic beam 1 includes:

[0064] A fixed block 11, on the left and right sides of which a transverse hydraulic cylinder 12 is symmetrically and detachably fixedly mounted;

[0065] The longitudinal hydraulic mechanism 4 is detachably fixedly assembled on the telescopic end of the transverse hydraulic cylinder 12 on the same side;

[0066] The telescopic end of the push-pull hydraulic cylinder 2 is detachably fixedly assembled on the rear wall of the horizontal hydraulic cylinder 12 on the same side. The horizontal hydraulic cylinder 12 is the hydraulic cylinder on both sides of the double-headed hydraulic beam 1. The horizontal hydraulic cylinders 12 on both sides are started synchronously to push the outer longitudinal hydraulic mechanism 4 to move outward.

[0067] In some embodiments, in order to realize the telescopic operation, the two sides inside the double-headed hydraulic beam 1, the push-pull hydraulic cylinder 2 and the longitudinal hydraulic mechanism 4 have the same structure, and the push-pull hydraulic cylinder 2 includes:

[0068] The installation cylinder 21 has a sealing design at its rear end;

[0069] The rear end of the hydraulic cylinder body 23 is fixedly mounted on the rear wall of the inner cavity of the mounting tube 21;

[0070] A connecting rod 22 is slidably inserted into the open end of the mounting tube 21, and the front end of the connecting rod 22 is detachably fixedly assembled with the rear wall of the horizontal hydraulic cylinder 12 on the same side;

[0071] The telescopic front end of the hydraulic cylinder body 23 is fixedly connected to the rear end of the connecting rod 22 .

[0072] The hydraulic cylinders in this embodiment are all connected to an external fluid supply system, and the external fluid supply system is controlled by an external controller. After fluid supply, the hydraulic cylinder body 23 can be extended and retracted.

[0073] In some embodiments, in order to start the corresponding hydraulic cylinder by contact triggering, the trigger structure 9 is assembled in the mounting tube 21 and between the rear end of the connecting rod 22, and the trigger structure 9 includes:

[0074] A sliding installation cavity 91 is formed on the inner wall of the installation tube 21;

[0075] A piston block 92 is slidably mounted in the sliding mounting cavity 91;

[0076] A contact switch 93 is attached and fixed to the front edge of the piston block 92. After the hydraulic cylinder body 23 pushes the piston block 92 forward, the contact switch 93 on the piston block 92 abuts against the front wall of the inner cavity of the sliding installation cavity 91 and triggers, sending a signal to the external controller. The external controller controls the hydraulic cylinder corresponding to this trigger structure 9 to start.

[0077] The hydraulic cylinder body 23 pushes the piston block 92 to drive the contact switch 93 to contact the front wall of the inner cavity of the sliding installation cavity 91 to trigger, and the contact switch 93 is electrically connected to the external controller;

[0078] The external controller is electrically connected to both sides of the double-head hydraulic beam 1, the push-pull hydraulic cylinder 2 and the longitudinal hydraulic mechanism 4 respectively.

[0079] In some embodiments, in order to achieve synchronization of the hydraulic cylinders on both sides of the connection, the first series synchronization oil circuit 10, the second series synchronization oil circuit 3 and the third series synchronization oil circuit 5 have the same structure, and the second series synchronization oil circuit 3 includes:

[0080] A liquid inlet pipe 31, which is fixedly connected to the liquid inlet end of the left push-pull hydraulic cylinder 2;

[0081] A connecting pipe 32 is fixedly connected between the liquid outlet end of the push-pull hydraulic cylinder 2 and the liquid inlet end of the right push-pull hydraulic cylinder 2;

[0082] The liquid outlet end of the right push-pull hydraulic cylinder 2 is fixedly connected to a liquid outlet pipe 33. The above structure realizes the series synchronization of the hydraulic cylinders on both sides, and the compensation valve provided by the hydraulic cylinder compensates for the accumulated error.

[0083] In some embodiments, in order to facilitate the disassembly and installation of the push-pull hydraulic cylinder 2 and the frame of the aerial work vehicle, the connection structure 8 includes:

[0084] A connecting plate 81, which is welded to the rear end of the push-pull hydraulic cylinder 2;

[0085] A fixing bolt 82 is fixedly mounted between the connecting plate 81 and the frame of the aerial work vehicle.

[0086] In some embodiments, in order to improve the connection strength between the two ends of the double-headed hydraulic beam 1 and the longitudinal hydraulic mechanism 4 on the same side, and between the front end 2 of the push-pull hydraulic cylinder and the double-headed hydraulic beam 1, the positions between the two ends of the double-headed hydraulic beam 1 and the longitudinal hydraulic mechanism 4 on the same side, and between the front end of the push-pull hydraulic cylinder 2 and the double-headed hydraulic beam 1 can be removably fixedly assembled with a reinforced connection structure 7.

[0087] In some embodiments, in order to ensure the strength of the connection structure, the reinforced connection structure 7 is specifically triangular steel.

[0088] In some embodiments, in order to improve the support stability, the lower end of the longitudinal hydraulic mechanism 4 is fixedly equipped with a support seat 6, which includes:

[0089] A conical seat 61, the smaller end of which is welded to the lower end of the longitudinal hydraulic mechanism 4;

[0090] A support plate 62 is welded to the larger end of the conical seat 61 , and the bottom surface area of ​​the support plate 62 is larger than the bottom surface area of ​​the conical seat 61 .

[0091] In some embodiments, in order to prevent slipping, a rubber pad 63 is adhered and fixed to the bottom surface of the support plate 62 .

[0092] Working principle:

[0093] First, open the push-pull hydraulic cylinder 2 to push the double-headed hydraulic beam 1 to extend outward. After the push-pull hydraulic cylinder 2 is fully started, the trigger structure 9 inside it is triggered. After the trigger, the external controller controls the hydraulic cylinders on both sides of the double-headed hydraulic beam 1 to start, pushing the longitudinal hydraulic mechanisms 4 on both sides to extend outward. After both ends of the double-headed hydraulic beam 1 are fully started, the trigger structure 9 inside it is triggered. After the trigger, the external controller controls the longitudinal hydraulic mechanism 4 to start supporting the ground. After the above operations, the volume of the H-shaped outrigger is expanded laterally and longitudinally, increasing its span. When the device is not unfolded, the volume is small and can be installed on an aerial work vehicle with smaller specifications.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An H-type outrigger for an aerial work vehicle, characterized in that: include: A double-headed hydraulic crossbeam (1), wherein the oil inlet and outlet ends on both sides of the crossbeam are fixedly connected to a first series synchronous oil circuit (10); The left and right sides of the rear wall of the double-headed hydraulic crossbeam (1) are detachably fixedly equipped with push-pull hydraulic cylinders (2), and the oil inlet and outlet ends of the push-pull hydraulic cylinders (2) on both sides are fixedly connected with a second series synchronous oil circuit (3); The rear end of the push-pull hydraulic cylinder (2) is fixedly equipped with a connecting structure (8), and the connecting structure (8) is fixedly connected to the frame of the aerial work vehicle; Both ends of the double-headed hydraulic crossbeam (1) are detachably fixedly equipped with longitudinal hydraulic mechanisms (4), and a third series synchronous oil circuit (5) is fixedly connected between the oil inlet and outlet ends of the longitudinal hydraulic mechanisms (4) on both sides; The two sides of the double-head hydraulic beam (1) and the push-pull hydraulic cylinder (2) are both equipped with trigger structures (9); The trigger structure (9) of the push-pull hydraulic cylinder (2) is activated, triggering the double-headed hydraulic beam (1) to start; The trigger structures (9) on both sides inside the double-headed hydraulic crossbeam (1) are activated, triggering the longitudinal hydraulic mechanisms (4) on both sides to start.

2. The H-shaped outrigger for aerial work vehicle according to claim 1, characterized in that: The double-headed hydraulic crossbeam (1) comprises: A fixed block (11) with transverse hydraulic cylinders (12) symmetrically and detachably fixedly mounted on its left and right sides; The longitudinal hydraulic mechanism (4) is detachably fixedly mounted on the telescopic end of the transverse hydraulic cylinder (12) on the same side; The telescopic end of the push-pull hydraulic cylinder (2) is detachably fixedly mounted on the rear wall of the transverse hydraulic cylinder (12) on the same side.

3. The H-shaped outrigger for aerial work vehicle according to claim 2, characterized in that: The two sides inside the double-headed hydraulic beam (1), the push-pull hydraulic cylinder (2) and the longitudinal hydraulic mechanism (4) have the same structure. The push-pull hydraulic cylinder (2) comprises: The installation cylinder (21) has a sealing design at its rear end; The rear end of the hydraulic cylinder body (23) is fixedly mounted on the rear wall of the inner cavity of the mounting tube (21); A connecting rod (22) is slidably inserted into the open end of the installation tube (21), and the front end of the connecting rod (22) is detachably fixedly assembled with the rear wall of the transverse hydraulic cylinder (12) on the same side; The telescopic front end of the hydraulic cylinder body (23) is fixedly connected to the rear end of the connecting rod (22).

4. The H-shaped outrigger for aerial work vehicle according to claim 3, characterized in that: The trigger structure (9) is assembled in a position between the installation tube (21) and the rear end of the connecting rod (22), and the trigger structure (9) comprises: A sliding installation cavity (91) is formed on the inner wall of the installation cylinder (21); A piston block (92) slidably mounted in the sliding mounting cavity (91); A contact switch (93) is glued and fixed to the front edge of the piston block (92); The hydraulic cylinder body (23) pushes the piston block (92) to drive the contact switch (93) to contact the front wall of the inner cavity of the sliding installation cavity (91) to be triggered, and the contact switch (93) is electrically connected to an external controller; The external controller is electrically connected to the two sides of the double-head hydraulic crossbeam (1), the push-pull hydraulic cylinder (2) and the longitudinal hydraulic mechanism (4) respectively.

5. The H-shaped outrigger for aerial work vehicle according to claim 1, characterized in that: The first series synchronous oil circuit (10), the second series synchronous oil circuit (3) and the third series synchronous oil circuit (5) have the same structure, and the second series synchronous oil circuit (3) comprises: A liquid inlet pipe (31) fixedly connected to the liquid inlet end of the push-pull hydraulic cylinder (2) on the left side; A connecting pipe (32) is fixedly connected between the liquid outlet end of the push-pull hydraulic cylinder (2) and the liquid inlet end of the push-pull hydraulic cylinder (2) on the right side; The liquid outlet end of the push-pull hydraulic cylinder (2) on the right side is fixedly connected to a liquid outlet pipe (33).

6. The H-shaped outrigger for aerial work vehicle according to claim 1, characterized in that: The connection structure (8) comprises: A connecting plate (81) welded to the rear end of the push-pull hydraulic cylinder (2); A fixing bolt (82) is fixedly mounted between the connecting plate (81) and the frame of the aerial work vehicle.

7. The H-shaped outrigger for aerial work vehicle according to claim 1, characterized in that: The positions between the two ends of the double-headed hydraulic beam (1) and the longitudinal hydraulic mechanism (4) on the same side, and the positions between the front end of the push-pull hydraulic cylinder (2) and the double-headed hydraulic beam (1) are all detachably fixedly equipped with a reinforced connection structure (7).

8. The H-shaped outrigger for aerial work vehicle according to claim 7, characterized in that: The reinforced connection structure (7) is specifically triangular steel.

9. The H-shaped outrigger for aerial work vehicle according to claim 1, characterized in that: The lower end of the longitudinal hydraulic mechanism (4) is fixedly equipped with a support seat (6), which comprises: A conical seat (61) whose smaller end is welded to the lower end of the longitudinal hydraulic mechanism (4); A support plate (62) is welded to the larger end of the conical seat (61), and the area of ​​the bottom surface of the support plate (62) is larger than the area of ​​the bottom surface of the conical seat (61).

10. The H-shaped outrigger for aerial work vehicle according to claim 9, characterized in that: A rubber pad (63) is glued and fixed to the bottom surface of the support plate (62).

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