Detachable supporting leg structure of miniature crawler crane

Abstract

The utility model relates to the technical field of miniature crawler cranes, in particular to a detachable supporting leg structure of a miniature crawler crane, which comprises a first connecting part, a first supporting leg, a second connecting part, a second supporting leg, a telescopic oil cylinder and a hydraulic quick connector. One side of the first connecting part is detachably hinged to a chassis of the miniature crawler crane, the other side of the first connecting part is hinged to one end of the first supporting leg, the other end of the first supporting leg is fixedly connected with one side of the second connecting part, and the other side of the second connecting part is hinged to the second supporting leg. A telescopic oil cylinder is arranged between the first connecting part and the second connecting part, and a hydraulic pipeline of the telescopic oil cylinder is detachably connected with a hydraulic pipeline in the miniature crawler crane through a hydraulic quick connector. According to the utility model, the detachable supporting leg structure is arranged, so that the transfer in a narrow space is more convenient; and meanwhile, goods elevators, cableways and the like with the bearing capacity requirement are more convenient to transport, and use in actual operation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of miniature tracked crane technology, and specifically to a detachable outrigger structure for a miniature tracked crane. Background Technology

[0002] Miniature crawler cranes are also known as spider cranes or spider hoists because their four outriggers, when extended, resemble a spider. Compared to other large cranes, miniature crawler cranes have a compact structure, allowing them to move freely on construction sites and operate in confined indoor spaces, resulting in high work efficiency and making construction more convenient. Miniature crawler cranes offer good stability, high load capacity, and excellent anti-slip performance, making them suitable for a wide range of applications, such as large-scale material storage and large-scale manufacturing. They are operated using wireless remote controls or on-body switches, offering fast operation speeds. Their compact design and small size, combined with their strong lifting capacity, eliminate the need for manual labor in confined spaces, improving both work efficiency and safety.

[0003] Due to their ease of movement and suitability for operation in confined spaces, mini crawler cranes often encounter various problems in actual operation. For example, the space may be too small for the mini crawler crane to pass through even when folded up. When it is necessary to go upstairs, it may not be able to enter the elevator or may exceed the elevator's load capacity. When operating on mountains, it may exceed the load capacity of the cableway. Therefore, they still have certain inconveniences in actual use.

[0004] To address the aforementioned issues, weight reduction can be implemented. In actual operation, the outriggers occupy a significant volume and have considerable weight, making them a suitable option for weight reduction. However, the hydraulic cylinders in existing outriggers are connected to the hydraulic system of the mini crawler crane and cannot be separated, which makes disassembly and separation of the outriggers inconvenient. Therefore, this invention proposes a detachable outrigger structure for a mini crawler crane. By disassembling the outriggers, the weight of the crane is reduced, making it more flexible and convenient in actual operation. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the prior art by providing a detachable outrigger structure for a miniature crawler crane, thereby enabling the crane's outriggers to be detached for greater convenience and flexibility in actual operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a detachable outrigger structure for a miniature crawler crane, comprising a first connecting part, a first outrigger, a second connecting part, and a second outrigger;

[0007] One side of the first connecting part is detachably hinged to the chassis of the miniature tracked crane;

[0008] The other side of the first connecting part is hinged to one end of the first leg, and the other end of the first leg is fixedly connected to one side of the second connecting part;

[0009] The other side of the second connecting part is hinged to the second leg;

[0010] A telescopic cylinder is installed between the first connecting part and the second connecting part. The cylinder body of the telescopic cylinder is hinged to the first connecting part, and the piston rod of the telescopic cylinder is hinged to the second connecting part. The hydraulic lines of the telescopic cylinder are detachably connected to the hydraulic lines in the mini crawler crane through hydraulic quick-connect couplings.

[0011] Furthermore, the first connecting part and the chassis are provided with matching connecting pin holes, and the first connecting part and the chassis are detachably hinged by connecting pins connected through the connecting pin holes.

[0012] Furthermore, a positioning device is provided on the first connecting part and the chassis. The positioning device includes a positioning pin and a positioning groove. The positioning pin is connected to the first connecting part, and the positioning groove is fixedly installed on the chassis. The first connecting part cooperates with the positioning groove.

[0013] Furthermore, the positioning groove includes an unfolded positioning groove and a retracted positioning groove, which respectively cooperate with the positioning pin; a positioning pin hole that cooperates with the positioning pin is provided on the first connecting part, and multiple positioning pin holes are provided, so that the positioning pin can cooperate with any positioning pin hole.

[0014] Furthermore, gas springs are installed below the first leg and the second leg, with the two ends of the gas springs hinged to the first leg and the second leg, respectively.

[0015] Furthermore, a hydraulic lock is installed on the cylinder body of the telescopic cylinder, and the hydraulic lines of the telescopic cylinder are detachably connected to the hydraulic lines in the mini crawler crane after passing through the hydraulic lock.

[0016] Furthermore, a protective cover is fixedly installed at the hinge joint between the telescopic cylinder and the second connecting part. The protective cover is arranged parallel to the telescopic cylinder along the direction pointing towards the cylinder body. When the piston rod of the telescopic cylinder is fully retracted, the protective cover and the hydraulic lock do not interfere with each other in space.

[0017] Furthermore, it also includes a third leg, one end of which is sleeved with the other end of the second leg. The third leg and the second leg are provided with mutually cooperating fixing pin holes. The second leg and the third leg are fixedly connected by installing fixing pins in the fixing pin holes. The other end of the third leg is hinged to the support foot.

[0018] Furthermore, a set of fixing pin holes is provided at the end of the second leg and multiple sets are provided on the third leg, and each set of fixing pin holes on the third leg can be respectively matched with the positioning pin holes on the second leg.

[0019] Furthermore, a handrail is provided on one side of the second leg.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model, by setting a detachable outrigger structure, can reduce the weight of the crane by removing the outriggers, thus making it more convenient and flexible to use in actual operation; at the same time, the hydraulic quick-connect coupling is convenient and easy to use, and can also ensure the stability of the crane's performance.

[0022] 2. This utility model is equipped with a protective cover, which can protect the telescopic cylinder during use and help ensure the service life of the telescopic cylinder. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the miniature crawler crane involved in this utility model (with the outriggers extended);

[0024] Figure 2 This is a schematic diagram of the overall structure of the miniature crawler crane involved in this utility model (with the outriggers retracted);

[0025] Figure 3 This is a utility model Figure 1 Schematic diagram of the connection structure between the outriggers and the chassis in section A;

[0026] Figure 4 This is a utility model Figure 1 Schematic diagram of the connection structure between the support leg and the chassis in section B;

[0027] Figure 5 This is a schematic diagram of the overall structure of the support leg of this utility model (with the telescopic cylinder extended).

[0028] Figure 6 This is a schematic diagram of the overall structure of the support leg of this utility model (with the telescopic cylinder in the retracted state);

[0029] Figure 7 This is a schematic diagram of the gas spring installation structure in the outrigger structure of this utility model.

[0030] The names corresponding to each mark in the diagram:

[0031] 1. Vehicle body; 11. Chassis; 12. Tracks; 13. Crane boom; 14. Hydraulic power unit; 2. Outriggers; 21. First connecting part; 22. First outrigger; 23. Second connecting part; 24. Second outrigger; 241. Handrail; 25. Third outrigger; 26. Outrigger foot; 27. Telescopic cylinder; 271. Protective cover; 272. Hydraulic lock; 273. Hydraulic quick connector; 28. Gas spring; 3. Connecting pin; 4. Positioning device; 41. Positioning pin; 42. Positioning groove; 5. Fixing pin. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0033] Embodiments of this utility model:

[0034] like Figure 1-2 As shown, this embodiment involves a miniature tracked crane, which includes a chassis 11, tracks 12 mounted on both sides of the chassis 11, and a boom 13 mounted on the chassis 11 via a turntable. In this embodiment, the boom 13 is a multi-section telescopic boom, and a hydraulic power unit 14 is provided on one side of the chassis 11. The hydraulic power unit 14 includes a hydraulic oil tank and a hydraulic pump, wherein the hydraulic pump is connected to the undulating cylinder on the boom 13 and the telescopic cylinder 27 on the outriggers.

[0035] In this embodiment, four support legs 2 are installed around the periphery of the chassis 11, with two on each side of the chassis 11 arranged symmetrically. The support legs 2 are hinged to the chassis 11. A first connecting part 21 and a first support leg 22 are provided in the support legs 2. One side of the first connecting part 21 is detachably hinged to the chassis 11 by a connecting pin 3, and the other side of the first connecting part 21 is hinged to one end of the first support leg 22. Specifically, the first connecting part 21 is in the shape of a semi-"I" and pin holes are provided on the chassis 11 and the first connecting part 21 respectively. The chassis 11 and the first connecting part 21 are detachably hinged by inserting a connecting pin 3 into the pin hole.

[0036] In this embodiment, the outrigger 2 further includes a second connecting part 23. The other end of the first outrigger 22 is fixedly connected to one side of the second connecting part 23. A telescopic cylinder 27 is installed between the first connecting part 21 and the second connecting part 23. The cylinder body of the telescopic cylinder 27 is hinged to the first connecting part 21, and the piston rod of the telescopic cylinder 27 is hinged to the second connecting part 23. A hydraulic lock 272 is installed on the cylinder body of the telescopic cylinder 27. The hydraulic pipeline of the telescopic cylinder 27 is connected to the hydraulic power unit 14 through the hydraulic lock 272. The hydraulic pipeline of the telescopic cylinder 27 and the hydraulic pipeline of the hydraulic power unit 14 are detachably connected through a hydraulic quick connector 273. In this embodiment, the hydraulic quick connector 273 is a KZE G1 / 4 inch type and includes a quick male connector and a quick female connector.

[0037] In this embodiment, the support leg 2 also includes a second support leg 24. One end of the second support leg 24 is hinged to the other side of the second connecting part 23. A gas spring 28 is installed between the first support leg 22 and the second support leg 24. The two ends of the gas spring 28 are respectively hinged to the first support leg 22 and the second support leg 24.

[0038] In this embodiment, the support leg also includes a third support leg 25, one end of which is sleeved with the other end of the second support leg 24. A handrail 241 is provided on the second support leg 24. A matching pin hole is provided between the second support leg 24 and the third support leg 25. Multiple pin holes are provided on the third support leg 25, and one is provided at the other end of the second support leg 24. A fixing pin 5 is installed through the pin hole to realize the telescopic and fixed connection between the second support leg 24 and the third support leg 25. A support foot 26 is provided at the other end of the third support leg 25, and the support foot 26 is hinged to the third support leg 25.

[0039] In another embodiment of this utility model, a positioning device 4 is provided between the chassis 11 and the support leg 2. The positioning device 4 includes a positioning pin 41 and a positioning groove 42. A pin hole is provided on the first connecting part 21, and a positioning groove 42 is provided on the chassis 11. The positioning pin 41 passes through the pin hole and cooperates with the positioning groove 42. In this embodiment, there are two positioning grooves 42, namely a positioning groove 42 for the unfolded position and a positioning groove 42 for the retracted position, so as to realize the relative fixation of the support leg 2 with the chassis 11 when unfolded and retracted. At the same time, in this embodiment, there are three pin holes on the first connecting part 21, so that appropriate adjustments can be made within a small range during use, making it more convenient to use.

[0040] In another embodiment of this utility model, a protective cover 271 is fixedly installed at the hinge joint between the piston rod of the telescopic cylinder 27 and the second connecting part 23. The protective cover 271 is arranged parallel to the telescopic cylinder 27. The protective cover 271 is used to protect the piston rod of the telescopic cylinder 27 when working outdoors, such as from falling objects and rain.

[0041] The principle of this utility model is as follows:

[0042] During the use of this utility model, after the mini crawler crane has found a parking position, the operator manually pulls out the positioning pin 41 from the retracted position, then rotates the outrigger 2 to the extended position, and engages the positioning pin 41 with the positioning groove 42 at the extended position; at this time, the second outrigger 24 is pulled outward, and the second outrigger 24 is extended. Then the fixing pin 5 can be removed, the third outrigger 25 can be extended, and then fixed.

[0043] After the above operations are completed, the telescopic cylinder 27 is extended, so that the outrigger 26 can be stably fixed on the ground to form support for the vehicle body 1, ensuring the safety of the operation.

[0044] In the use of this utility model, it can be detachably connected to a mini crawler crane. Mini crawler cranes are a mature existing technology. The total weight of the vehicle body 1 is available in models with capacities of 1 ton, 3 tons, 5 tons, and 8 tons. This makes it inconvenient to move the crane when there are load limits and space constraints. Therefore, this utility model can separate the hydraulic lines of the outrigger extension cylinder 27 from the vehicle body 1 through the hydraulic quick connector 273, so that the outriggers 2 can be disassembled and transported separately, making the transfer more convenient and flexible. At the same time, the quick disassembly process is convenient and does not affect the stability of the vehicle performance. It should be noted that since the outriggers 2 have a certain weight, certain mechanical equipment, such as forklifts, can be used to assist in the actual disassembly process.

[0045] This utility model relates to a hydraulic quick connector 273, which includes a quick male connector and a quick female connector. The hydraulic quick connector 273 is a mature existing technology, such as KZE G1 / 4, etc. Its structure and principle are easy to understand for those skilled in the art, so they will not be described in detail here.

[0046] This utility model also provides protection for the telescopic cylinder 27 during use. Since cranes often need to operate outdoors, the telescopic cylinder 27 may rust when exposed to rain. The protective cover 271 in this utility model can protect the piston rod from rain and ensure its service life. In addition, the on-site working environment is complex, and the protective cover 271 can also protect the piston rod from damage caused by falling objects from heights.

Claims

1. A detachable outrigger structure for a miniature crawler crane, characterized in that: It includes a first connecting part (21), a first leg (22), a second connecting part (23), and a second leg (24); One side of the first connecting part (21) is detachably hinged to the chassis (11) of the miniature tracked (12) crane; The other side of the first connecting part (21) is hinged to one end of the first leg (22), and the other end of the first leg (22) is fixedly connected to one side of the second connecting part (23); The other side of the second connecting part (23) is hinged to the second leg (24); A telescopic cylinder (27) is installed between the first connecting part (21) and the second connecting part (23). The cylinder body of the telescopic cylinder (27) is hinged to the first connecting part (21), and the piston rod of the telescopic cylinder (27) is hinged to the second connecting part (23). The hydraulic pipeline of the telescopic cylinder (27) is detachably connected to the hydraulic pipeline in the mini crawler (12) crane through a hydraulic quick connector (273).

2. The detachable outrigger structure of a miniature crawler crane according to claim 1, characterized in that: The first connecting part (21) and the chassis (11) are provided with matching connecting pin holes, and the first connecting part (21) and the chassis (11) are detachably hinged by connecting pin (3) through the connecting pin holes.

3. The detachable outrigger structure of a miniature crawler crane according to claim 1, characterized in that: The first connecting part (21) and the chassis (11) are provided with a positioning device (4). The positioning device (4) includes a positioning pin (41) and a positioning groove (42). The positioning pin (41) is connected to the first connecting part (21), and the positioning groove (42) is fixedly installed on the chassis (11). The first connecting part (21) and the positioning groove (42) cooperate with each other.

4. The detachable outrigger structure of a miniature crawler crane according to claim 3, characterized in that: The positioning groove (42) includes an unfolding positioning groove and a retracting positioning groove, which are respectively engaged with the positioning pin (41); a positioning pin hole is provided on the first connecting part (21) to engage with the positioning pin (41), and multiple positioning pin holes are provided, so that the positioning pin (41) can engage with any positioning pin hole.

5. The detachable outrigger structure of a miniature crawler crane according to claim 1, characterized in that: Gas springs (28) are installed below the first leg (22) and the second leg (24), and the two ends of the gas springs (28) are respectively hinged to the first leg (22) and the second leg (24).

6. The detachable outrigger structure of a miniature crawler crane according to claim 1, characterized in that: The telescopic cylinder (27) is equipped with a hydraulic lock (272) on its cylinder body. The hydraulic lines of the telescopic cylinder (27) are detachably connected to the hydraulic lines in the mini crawler crane after passing through the hydraulic lock (272).

7. The detachable outrigger structure of a miniature crawler crane according to claim 6, characterized in that: A protective cover (271) is fixedly installed at the hinge of the telescopic cylinder (27) and the second connecting part (23). The protective cover (271) is arranged parallel to the telescopic cylinder (27) along the direction pointing to the cylinder body. When the piston rod of the telescopic cylinder (27) is fully retracted, the protective cover (271) and the hydraulic lock (272) do not interfere with each other in space.

8. The detachable outrigger structure of a miniature crawler crane according to claim 1, characterized in that: It also includes a third leg (25), one end of which is sleeved with the other end of the second leg (24). The third leg (25) and the second leg (24) are provided with mutually cooperating fixing pin holes. The second leg (24) and the third leg (25) are fixedly connected by installing fixing pins (5) in the fixing pin holes. The other end of the third leg (25) is hinged to the support foot (26).

9. The detachable outrigger structure of a miniature crawler crane according to claim 8, characterized in that: The fixing pin hole is provided in one set at the end of the second leg (24) and multiple sets are provided on the third leg (25). Each set of fixing pin holes on the third leg (25) can be matched with the positioning pin hole on the second leg (24).

10. The detachable outrigger structure of a miniature crawler crane according to claim 8, characterized in that: A handrail (241) is provided on one side of the second leg (24).

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