Supporting device and engineering machinery

Abstract

The invention relates to the technical field of engineering machinery, in particular to a supporting device and engineering machinery, the supporting device is used for being installed at a supporting leg of the engineering machinery, and the supporting device comprises a supporting leg disc; the telescopic oil cylinder comprises a telescopic rod which stretches out and draws back in the third direction; the support is arranged on the telescopic rod, a limiting rod is arranged on the support, and a limiting groove is formed in the limiting rod; the mounting seat is connected with the supporting leg disc through a connecting rod mechanism; the transmission assembly is configured to drive the supporting foot disc to move in the first direction through the support; the limiting assembly is configured to drive the limiting sliding block to move in the first direction when the telescopic rod stretches out. When the telescopic rod stretches out by a first length, the limiting sliding block moves into the limiting groove so as to limit relative movement between the support and the mounting base. The supporting foot disc is driven to stretch out and retract through the telescopic motion of the telescopic oil cylinder, the automation degree is high, and the purposes of labor saving and convenience in operation are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a supporting device and engineering machinery. Background Art

[0002] When a wheeled crane or other heavy construction machinery is in operation, the outriggers need to follow the movable legs and telescopic cylinders to remain extended outward. When the operation is completed and the site is moved, due to the requirements of roads, regulations, etc. on vehicle width limits, the outriggers usually need to follow the movable legs and telescopic cylinders to remain retracted inward.

[0003] As the market's requirements for the performance, cost, and automation of wheeled cranes of the same tonnage become increasingly higher, the size and weight of the outriggers will be designed to be larger and larger on the existing basis. The traditional method of pushing the outriggers by hand is becoming increasingly difficult to implement. How to recycle and save effort and automate operations has become an issue that the industry urgently needs to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a supporting device and engineering machinery, which can drive the support plate to extend and retract through the telescopic movement of the telescopic oil cylinder itself, and has a high degree of automation, so as to achieve the purpose of labor-saving and convenient operation. The present invention adopts the following technical solutions to solve the problem: In a first aspect, the present invention provides a supporting device for installation at a support leg of an engineering machine, comprising: Foot plate; A telescopic oil cylinder is fixed to the supporting leg, and the telescopic oil cylinder includes a telescopic rod that is telescopic along a third direction; A support, arranged on the telescopic rod, the support is provided with a limiting rod arranged along a third direction, the limiting rod is formed with a limiting groove extending along a first direction; the third direction intersects with the first direction; A transmission assembly, used to connect the support and the support plate; A mounting seat connected to the support plate through a connecting rod mechanism; a third slideway along the first direction is formed on the mounting seat; The limiting assembly comprises a limiting slider which is drivingly connected to the support; the limiting slider is slidably matched with the third slideway; When the telescopic rod is extended to a first length, the support foot plate is driven by the support to move out along the first direction; at the same time, the limit slider is driven by the support to slide along the third slide to the extreme position, so that the end of the limit slider is located in the limit groove to limit the relative movement between the mounting base and the support.

[0005] Optionally, the limiting component includes: A fixed slide block, fixed on the supporting leg; A sliding slide is formed on the fixed slide block along a first direction, A toggle slider is slidably disposed in the toggle slideway; A transmission rod, both ends of which are respectively hinged to the support and the toggle slider; The toggle slider is formed with a first slideway that penetrates along a third direction, and the first slideway is used to accommodate the limit slider.

[0006] Optionally, the supporting device further comprises: A compression spring is disposed in the toggle slideway, the compression spring abuts against the toggle slider and is located at a side away from the first slideway; When the telescopic rod is fully retracted, the support causes the toggle slider to compress the compression spring through the transmission rod; when the telescopic rod is extended, the compression spring is reset to keep the toggle slider moving outward.

[0007] Optionally, it also includes: A connecting rod is arranged on the support, an embedding groove is formed at the end of the connecting rod, and one end of the transmission rod is hinged in the embedding groove; When the telescopic rod continues to extend after extending to the first length, the transmission rod can be disengaged from the embedding groove.

[0008] Optionally, it also includes: A cylinder mounting plate is fixed on the supporting leg, the telescopic cylinder is passed through the cylinder mounting plate, and a second slideway extending along the first direction is formed on the side wall of the cylinder mounting plate; When the telescopic rod is fully retracted, the limit slider is located in the first slideway; Before the telescopic rod is extended to the first length, the transmission rod drives the toggle slider to move along the toggle slideway, and at the same time, the toggle slider drives the limit slider to move along the second slideway and the third slideway through the first slideway; When the telescopic rod is extended to a first length, the limiting sliding block escapes from the second slideway and moves into the limiting groove along the third slideway; After the telescopic oil cylinder is extended to a first length, the limit sliding block is located in the limit groove and the third slideway, and the mounting seat is separated from the oil cylinder mounting plate and remains relatively fixed with the support.

[0009] Optionally, it also includes: The support slideway penetrates the mounting seat along the third direction, and the support slideway cooperates with the limiting rod in a guiding manner.

[0010] Optionally, both sides of the telescopic cylinder in the second direction are provided with limit assemblies and the transmission assembly, and the first direction, the second direction and the third direction intersect with each other.

[0011] Optionally, the support plate includes a base, a ball socket is formed on the base, a slide seat is provided on the ball socket, a ball head is formed at the end of the telescopic rod, when the telescopic rod is fully retracted, the ball head maintains a preset distance from the ball socket, and when the telescopic rod is extended to a first length, the ball head just contacts the ball socket.

[0012] .A supporting device according to claim, characterized in that the connecting rod mechanism comprises a plurality of connecting rods arranged in parallel; the bottom end of each connecting rod is hinged to the base, and the top end is hinged to the mounting seat; The transmission assembly also includes: A rope group, comprising a retracting rope and an extending rope respectively arranged on both sides of the support in the first direction; The first end and the second end of the retraction rope are fixed to the support and the base respectively, and pass through the second fixed pulley, the first fixed pulley and the fourth fixed pulley in sequence from the first end to the second end; the first fixed pulley is connected to the mounting seat; the second fixed pulley is arranged on the slide seat, and the fourth fixed pulley is arranged on the base; The first end and the second end of the extended rope are fixed to the support and the base respectively, and pass through the movable pulley and the third fixed pulley in sequence from the first end to the second end; the movable pulley is arranged at a fixed bracket on the mounting seat along the third direction, and the third fixed pulley is arranged on the base; The fixed bracket is provided with a tension spring connected to the movable pulley. When the telescopic rod is fully retracted, the movable pulley pulls the tension spring down to maintain the tension. When the telescopic rod is extended to a first length, the tension spring is reset to keep the movable pulley moving upward.

[0013] In a second aspect, the present invention provides an engineering machine, comprising any one of the supporting devices described.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can utilize the telescopic movement of the telescopic oil cylinder to automatically control the extension and retraction of the support plate, which can solve the problem of difficult manual operation during the extension and retraction of the support plate with large volume and weight, thereby improving the working efficiency and working safety of various construction machinery such as wheeled cranes.

[0015] 2. In the present invention, the extension and retraction process of the support plate can be carried out synchronously with the extension and retraction process of the legs and the vertical cylinder. This saves more time than the sequential action of extending and retracting the support plate after the legs and the vertical cylinder are extended and retracted. At the same time, in the automatic extension and retraction device of the support plate, the entire extension and retraction process of the support plate is completely driven by the extension and retraction process of the vertical cylinder, and no additional power is required. This ensures that the device has a simpler and more compact structure in actual application.

[0016] 3. All mechanisms in the automatic telescopic device of the support plate in the present invention are composed of pure mechanical structures, and the entire transmission system can maintain its original state through compression springs and extension springs, thereby realizing the repeated extension and retraction of the support plate, which is stable and reliable in practical application.

[0017] 4. The support plate of the automatic extension and retraction device of the support plate in this solution of the present invention is connected with other related mechanisms by multi-point symmetrical arrangement, thereby ensuring that the support plate with larger volume and weight is more evenly stressed when extending and retracting, and the process is smoother. The support device of the present invention can be applied to support plates of any shape and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the support device of Example 1 when the telescopic cylinder is fully retracted; Figure 2 for Figure 1 Schematic diagram of the structure of the middle support; Figure 3 It is a schematic structural diagram of the support device of Example 1 when the telescopic cylinder is extended to a first length; Figure 4 It is a structural schematic diagram of the supporting device of Example 1 when the telescopic cylinder continues to extend after extending to a first length; Figure 5 for Figure 1 Schematic diagram of the explosion structure of the middle telescopic cylinder; Figure 6 for Figure 1 Structural diagram of the middle oil cylinder mounting plate, fixed slide block and some associated structures; Figure 7 for Figure 1 Structural schematic diagram of the middle limit following mechanism and the movable pulley block; Figure 8 for Figure 1 Schematic diagram of the structure of the middle support plate.

[0019] Numbers in the figure: 100, outrigger; 200, telescopic oil cylinder; 210, cylinder barrel; 220, cylinder head; 230, telescopic rod; 300, limit assembly; 310, oil cylinder mounting plate; 320, fixed slide block; 330, toggle slider; 340, compression spring; 350, transmission rod; 360, mounting bolt; 370, first slide; 380, second slide; 390, toggle slide; 400, limit follower mechanism; 410, mounting seat; 420, first fixed pulley block; 430, limit slider; 440, fixed bracket; 450, tension spring; 460, movable pulley block; 4601, pulley bracket; 4602, pulley; 470, third slide; 480, support slide; 490, movable pulley slide; 500, support; 510, limit groove; 520, embedding groove; 530, limit rod; 540, connecting rod; 600, support plate; 610, second fixed pulley block; 620, slide groove seat; 630, third fixed pulley block; 640, fourth fixed pulley block; 650, mounting support; 660, base; 700, connecting rod mechanism; 800, rope block; 810, extending rope block; 820, retracting rope block. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] In the prior art known to the inventor of the present application, the leg tray is mostly manually pushed before being moved out or retracted. However, as the weight of the leg tray gradually increases, manually pushing the leg tray is not only laborious but also increasingly difficult, which has had a significant impact on the actual operation. In addition, since the legs of the engineering machinery are all arranged with telescopic cylinders for supporting the engineering machinery, if a corresponding driving mechanism is additionally arranged for the extension and retraction of the leg tray, it is easy to interfere with the telescopic cylinder, and the cost will also be increased, and the actual feasibility is not high. There are also some supporting devices in the prior art that use the telescopic cylinder itself as a driving member, which can reduce the cost of additional arrangement and avoid interference. However, the telescopic cylinder needs to play the role of supporting the engineering machinery, and the adjustment range of the telescopic cylinder stroke is large, while the leg tray only needs to be extended to the body of the engineering machinery, and the extension and retraction stroke of the leg tray is relatively small. If the movement of the telescopic cylinder is used to drive the leg tray to move through the transmission, the transmission mechanism is easily involved and damaged when the telescopic cylinder moves with a large stroke, and at the same time, this transmission cannot affect the movement stability of the telescopic cylinder itself.

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0023] Combination Figure 1 The present embodiment provides a supporting device for installation at the leg 100 of the engineering machinery, which includes a foot plate 600; the foot plate 600 generally includes a base 660, a ball socket is formed on the base 660, and a slide seat 620 is provided outside the ball socket. Correspondingly, the telescopic oil cylinder 200 installed at the leg 100 includes a telescopic rod 230, and a ball head is provided at the end of the telescopic rod 230. After the telescopic rod 230 is extended, the ball head can be abutted in the ball socket to serve as a support point for supporting the engineering machinery, and the slide seat 620 can limit the ball head in the slide seat 620 to prevent it from falling out.

[0024] Understandably, combined Figure 4 After the telescopic rod 230 of the telescopic oil cylinder 200 is extended so that the ball head contacts the ball socket, the telescopic oil cylinder 200 needs to be further extended to prop up the construction machinery based on the supporting point. The specific propping height may be higher or lower according to actual needs and is difficult to determine. Based on this usage, combined with Figure 1 , Figure 3 and Figure 4 The present application utilizes the travel section in which the telescopic cylinder 200 extends from the fully retracted state to allow the ball head and the ball socket to contact as the travel section for driving the support plate 600 to extend.

[0025] Specifically, combined Figure 5In this embodiment, the telescopic cylinder 200 further includes a cylinder body, which is fixed to the support leg 100 . The telescopic rod 230 is telescopic along a third direction, and the cylinder body includes a cylinder barrel 210 and a cylinder cover 220 .

[0026] To facilitate the description of directions, the first direction, the second direction and the third direction in this document are three directions that intersect each other. In a specific embodiment, the first direction, the second direction and the third direction can be a vertical rectangular coordinate system, that is, the X-axis direction, the Y-axis direction and the Z-axis direction shown in the accompanying drawings.

[0027] Combination Figure 2 The support device further includes a support 500, which is the core structure of the transmission process in this embodiment. The support 500 is arranged on the telescopic rod 230 and can move synchronously with the telescopic rod 230. In addition, a limiting rod 530 is also provided on the support 500, and the limiting rod 530 can move in the third direction with the support 500. A limiting groove 510 extending along the first direction is formed on the limiting rod 530. The purpose of the limiting groove 510 here is to place a limiting structure to limit the relative movement between the limiting rod 530, that is, the support 500 and the mounting seat 410; the mounting seat 410 is used to be connected to the support plate through a connecting rod.

[0028] Furthermore, the support device further includes a transmission assembly, and the transmission assembly is configured to drive the support plate 600 to move in the first direction through the support 500 when the telescopic rod 230 is extended in the third direction. Specifically, when the support 500 is extended, the transmission assembly converts the movement of the support 500 in the third direction into the movement of the support plate 600 in the first direction through the corresponding transmission member. In a specific embodiment, the transmission assembly can be selected from one or more combinations of a transmission rod group, a transmission rope group, a pulley group, a belt drive, a gear train drive, or other transmission mechanisms in the prior art to achieve this function.

[0029] In addition, combined Figure 1-Figure 4 as well as Figure 6 In this embodiment, the support device further includes a limit assembly 300, which includes a transmission rod 350 and a limit slider 430 as a limit structure. The limit assembly 300 is configured such that before the telescopic rod 230 extends to a first length, the first length here is a preset stroke set according to other structures; the support 500 drives the limit slider 430 to move along a first direction through the transmission rod 350. When the telescopic rod 230 extends to the first length, the limit slider 430 moves into the limit slot 510 on the limit rod 530 to limit the relative movement of the support and the mounting seat 410.

[0030] Among them, the transmission rod 350 can be an L-shaped rocker or other structural parts with the same function in the prior art, the limit slider 430 can be T-shaped or π-shaped and other structural shapes that can prevent disengagement in the prior art, and the guiding function required for the limit slider 430 to move along the first direction can be selected as a pre-arranged track part or a slide structure is opened on the leg 100 or the mounting structure on the leg 100 to achieve it.

[0031] In a specific embodiment, in order to realize the above-mentioned limit function, combined with Figure 6 The supporting device further comprises a cylinder mounting plate 310, the cylinder mounting plate 310 is fixed to the support leg 100 by a plurality of mounting bolts 360, and the telescopic cylinder 200 is disposed through the middle of the cylinder mounting plate 310. A second slideway 380 extending along the first direction is formed on the side wall of the cylinder mounting plate 310; Figure 2-Figure 4 When the telescopic rod 230 is extended to the first length, the limit rod 530 moves with the support 500. At this time, the limit groove 510 on the limit rod 530 can correspond to the position of the limit slider 430 that has escaped from the second slide 380. Specifically, the function of the second slide 380 is to slide with the first end of the limit slider 430 for guidance.

[0032] In addition, combined Figure 1 and Figure 6 The limiting assembly 300 includes a fixed slide block 320, which is fixed to the support leg 100; a toggle slide 390 is formed on the fixed slide block 320 along the first direction; a toggle slider 330 is slidably arranged in the toggle slide 390, and the two ends of the limiting rod 530 are respectively hinged on the support 500 and the toggle slider 330. A first slide 370 is formed on the toggle slider 330, which runs through the third direction, and the first slide 370 is used to accommodate the limiting slider 430 for transmission in the first direction. It can be understood that the third direction intersects with the first direction, and when the limiting slider 430 is accommodated in the first slide 370, the toggle slider 330 can simultaneously drive the limiting slider 430 to slide in the first direction under the guidance of the second slide 380 and the third slide 470 when sliding in the toggle slide 390.

[0033] In addition, the supporting device further comprises a position limiting following mechanism 400 , the mounting seat 410 belongs to the position limiting following mechanism 400 , and a third slideway 470 for supporting the middle part of the position limiting sliding block 430 is formed on the mounting seat 410 .

[0034] Thus, before the telescopic rod 230 is extended to the first length, the mounting seat 410 is located between the oil cylinder mounting plate 310 and the fixed slide block 320. At this time, the first end of the limiting slider 430 is located in the second slide 380 on the side wall of the oil cylinder mounting plate 310, the second end of the limiting slider 430 is located in the first slide 370 on the toggle slider 330, and the middle part of the limiting slider 430 between the first end and the second end is located in the third slide 470 on the mounting seat 410, so as to ensure that the limiting slider 430 can be stably supported and guided.

[0035] In addition, the mounting seat 410 is further provided with a support slide 480 penetrating along the third direction, and the support slide 480 cooperates with the limiting rod 530 to prevent the limiting rod 530 from shifting when moving in the third direction.

[0036] The whole exercise process is as follows: Figure 1 When the telescopic rod 230 is fully retracted, the limit slider 430 is located in the first slideway 370 on the toggle slider 330; when the telescopic rod 230 is extended, the transmission rod 350 drives the toggle slider 330 to move along the toggle slideway 390, and at the same time, the toggle slider 330 drives the limit slider 430 to move along the first direction under the guidance of the second slideway 380 and the third slideway 470 through the first slideway 370; combined with Figure 3 When the telescopic rod 230 is extended to the first length, the limiting rod 530 moves with the support 500 and makes the limiting groove 510 exactly aligned with the position of the limiting slider 430 that has escaped from the second slide 380. It is worth noting that in this embodiment, a connecting rod mechanism is used to connect the support plate 600 and the mounting seat 410. There is a relative rotational movement between the support plate 600 and the mounting seat 410 in the XZ axis plane (a composite plane of the first direction and the third direction). There is a relative movement between the cylinder mounting plate 310 where the second slide 380 is located and the mounting seat 410 where the third slide 470 is located in the third direction. Figure 6 In this embodiment, a notch is formed at the bottom wall of the open end of the second slideway 380, so that the limiting slider 430 can be pre-escaped from the second slideway 380. After the limiting slider 430 is driven by the toggle slider 330 to escape from the second slideway 380 along the third slideway 370, it can correspond to the position of the limiting groove 510 to move into the limiting groove 510; at this time, the limiting slider 430 is located in the third slideway 370 of the mounting seat 410 and the limiting groove 510 of the limiting rod 530, thereby limiting the relative movement between the limiting rod 530, that is, the support 500 and the mounting seat 410, so as to realize the reasonable use of a part of the stroke of the telescopic cylinder 200.

[0037] Combination Figure 4When the telescopic cylinder 200 performs telescopic movement after the first length, the support 500 and the mounting seat 410 remain relatively fixed and will not be propped up with the support, thereby avoiding the transmission component from being pulled and damaged. This not only makes reasonable use of the power of the telescopic cylinder 200 without introducing other power sources to save manpower, but also ensures the safety of the transmission component.

[0038] Furthermore, in this embodiment, the travel of the support 500 is limited by the limit slider 430. When the support 500 and the mounting seat 410 are limited in relative motion by the limit slider 430, the toggle slider 330 is located in the toggle slide 390 of the fixed slide block 320, and the fixed slide block 320 is fixed on the leg 100 and moves upward with the leg 100. In actual operation, the hinge connection between the toggle slider 330 and the transmission rod 350 can be manually released, and then the telescopic cylinder 200 can be controlled to continue to extend to avoid damage to the transmission rod 350. When the telescopic cylinder 200 is retracted to within the first length, the toggle slider 330 and the transmission rod 350 are hingedly connected to realize the reuse of the entire support device. Compared with manually removing the foot plate 600, the difficulty of operation is greatly reduced, which is labor-saving and convenient.

[0039] In another specific embodiment, in order to further reduce the difficulty of manual work, a compression spring 340 is provided in the toggle slide 390, and the compression spring 340 abuts against the toggle slider 330 and is located on a side away from the first slide 370; when the telescopic rod 230 is fully retracted, the support 500 causes the toggle slider 330 to compress the compression spring 340 through the transmission rod 350; when the telescopic rod 230 is extended, the compression spring 340 is reset to keep the toggle slider 330 moving outward. The compression spring 340 is used to be compressed and stored by the toggle slider 330 when the telescopic rod 230 is retracted, and after the telescopic rod 230 is extended to a first length, the compression spring 340 is reset and pushes the toggle slider 330 to an extreme position. In coordination therewith, the support 500 is provided with a connecting rod 540, the end of which is formed with an embedding groove 520, one end of the transmission rod 350 is hinged in the embedding groove 520; when the telescopic rod 230 continues to extend after extending to the first length, the transmission rod 350 can be disengaged from the embedding groove 520. The whole process is as follows: Before the telescopic rod 230 is extended to the first length, the two ends of the transmission rod 350 are respectively hinged to the embedding groove 520 and the toggle slider 330; When the telescopic rod 230 is just extended to the first length, the toggle slider 330 is pushed to the limit position by the reset compression spring 340, and the corresponding transmission rod 350 is also kept in the corresponding posture; The telescopic rod 230 continues to extend after the first length, and the toggle slider 330 continues to be supported by the telescopic oil cylinder 200 along with the fixed slide block 320 and the leg 100. The transmission rod 350 is located at one end of the embedded groove 520 and moves out upward. Under the reset action of the compression spring 340, the transmission rod 350 maintains its posture. The hinged end of the transmission rod 350 and the toggle slider 330 is also provided with a damper to prevent relative movement to ensure the stability of the posture of the transmission rod 350. When the telescopic rod 230 is retracted to the first length, the corresponding ends of the transmission rod 350 and the embedding groove 520 are inserted into the embedding groove 520 to restore the original state for subsequent reuse.

[0040] In a specific embodiment, the transmission assembly includes a rope group in addition to the connecting rod mechanism. When the telescopic rod 230 is extended within the first length, the rope group is pulled by the support 500 to drive the foot plate 600 to move. In this embodiment, the foot plate 600 is connected to the mounting seat 410 through a parallelogram linkage. The structural characteristics of the parallelogram linkage make the movement of the foot plate 600 essentially a compound movement in the first direction and the third direction (XZ plane). The partial movement in the first direction causes the foot plate 600 to extend, and the partial movement in the third direction causes the ball socket on the foot plate 600 to abut against the ball head at the end of the telescopic rod 230.

[0041] Specifically, the connecting rod mechanism includes a plurality of connecting rods arranged in parallel; the bottom end of each connecting rod is hinged to the base 650 on the base 660, and the top end is hinged to the mounting base 410; The rope group includes a retracting rope and an extending rope respectively arranged on both sides of the support 500 in the first direction; in a specific embodiment, two of the retracting rope and the extending rope are each provided and are symmetrically arranged on both sides of the telescopic cylinder 200 in the second direction to form a retracting rope group and an extending rope group.

[0042] The first end and the second end of the retracting rope are fixed to the support 500 and the base 660 respectively, and pass through the second fixed pulley, the first fixed pulley and the fourth fixed pulley in sequence from the first end to the second end; the first fixed pulley is connected to the mounting seat 410; the second fixed pulley is arranged on the slide seat 620, and the fourth fixed pulley is arranged on the base 660; The first end and the second end of the extended rope are fixed to the support 500 and the base 660 respectively, and pass through the movable pulley and the third fixed pulley in sequence from the first end to the second end; the movable pulley is arranged at the movable pulley slideway 490 of the fixed bracket 440 on the mounting seat 410 along the third direction, and the third fixed pulley is arranged on the base 660; the movable pulley includes a pulley bracket 4601 and a pulley 4602; The fixed bracket 440 is provided with a tension spring 450 connected to the movable pulley. When the telescopic rod 230 is fully retracted, the movable pulley pulls down the tension spring 450 to maintain the tension. When the telescopic rod 230 is extended to the first length, the tension spring 450 is reset to keep the movable pulley moving upward. The tension spring 450 can help the support plate 600 to automatically retract when the telescopic cylinder 200 is retracted. At the same time, after the support 500 and the mounting seat 410 are relatively limited, the connecting rod and the rope group can maintain the original posture for subsequent reset and reuse.

[0043] Among them, in order to ensure stable force bearing, transmission components are provided on both sides of the telescopic cylinder 200. Therefore, the first fixed pulley, the second fixed pulley, the third fixed pulley, the fourth fixed pulley and the movable pulley in the transmission assembly are all pulley groups arranged in pairs, namely the first fixed pulley group 420, the second fixed pulley group 610, the third fixed pulley group 630, the fourth fixed pulley group 640 and the movable pulley group 460. Example 2

[0044] Based on the same inventive concept as in Example 1, this embodiment provides an engineering machine, and the supporting device described in Example 1 is installed on the support leg 100 of the engineering machine.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A support device, used for installation at a support leg (100) of an engineering machine, comprising a support leg plate (600) and a telescopic cylinder (200), characterized in that: Also includes: A support (500) is arranged on the telescopic rod (230) of the telescopic oil cylinder (200), the support (500) is provided with a limiting rod (530) arranged along a third direction, the limiting rod (530) is formed with a limiting groove (510) extending along a first direction, and the third direction intersects with the first direction; A transmission assembly, used for connecting the support (500) and the support plate (600); A mounting seat (410) connected to the support plate (600) via a connecting rod mechanism (700); a third slideway (470) is formed on the mounting seat (410) along the first direction; The limiting assembly (300) comprises a limiting slider (430) drivingly connected to the support (500); the limiting slider (430) is slidably matched with the third slideway (470); When the telescopic rod (230) is extended to a first length, the support plate (600) is driven by the support (500) to move out along a first direction; at the same time, the limiting slider (430) is driven by the support (500) to slide along the third slideway (470) to an extreme position, so that the end of the limiting slider (430) is located in the limiting groove (510) to limit the relative movement between the mounting seat (410) and the support (500).

2. A supporting device according to claim 1, characterized in that: The limiting component (300) comprises: A fixed slide block (320) fixed on the support leg (100); A sliding slide (390) is formed on the fixed slide block (320) along a first direction. A toggle slider (330) is slidably disposed in the toggle slideway (390); A transmission rod (350), both ends of which are respectively hinged to the support (500) and the toggle slider (330); The toggle slider (330) is formed with a first slideway (370) that passes through along a third direction, and the first slideway (370) is used to accommodate the limit slider (430).

3. A supporting device according to claim 2, characterized in that: The supporting device also includes: A compression spring (340) is disposed in the toggle slideway (390), the compression spring (340) abutting against the toggle slider (330) and being located on a side away from the first slideway (370); When the telescopic rod (230) is fully retracted, the support (500) causes the toggle slider (330) to compress the compression spring (340) via the transmission rod (350); when the telescopic rod (230) is extended, the compression spring (340) is reset so that the toggle slider (330) maintains a tendency to move outward.

4. A supporting device according to claim 3, characterized in that: Also includes: A connecting rod (540) is arranged on the support (500), an embedding groove (520) is formed at the end of the connecting rod (540), and one end of the transmission rod (350) is hinged in the embedding groove (520); When the telescopic rod (230) continues to extend after extending to a first length, the transmission rod (350) can be disengaged from the embedding groove (520).

5. A supporting device according to claim 2, characterized in that: Also includes: A cylinder mounting plate (310) is fixed on the support leg (100); the telescopic cylinder (200) is disposed on the cylinder mounting plate (310); and a second slideway (380) extending along a first direction is formed on a side wall of the cylinder mounting plate (310); When the telescopic rod (230) is fully retracted, the limiting sliding block (430) is located in the first sliding channel (370); Before the telescopic rod (230) is extended to a first length, the transmission rod (350) drives the toggle slider (330) to move along the toggle slideway (390), and at the same time, the toggle slider (330) drives the limit slider (430) to move along the second slideway (380) and the third slideway (470) via the first slideway (370); When the telescopic rod (230) is extended to a first length, the limiting sliding block (430) escapes from the second slideway (380) and moves along the third slideway (470) into the limiting groove (510); After the telescopic oil cylinder is extended to a first length, the limiting sliding block (430) is located in the limiting groove (510) and the third slideway (470), and the mounting seat (410) and the support (500) remain relatively fixed.

6. A supporting device according to claim 5, characterized in that: Also includes: The support slideway (480) penetrates the mounting seat (410) along the third direction, and the support slideway (480) is guided and matched with the limiting rod (530).

7. A supporting device according to claim 1, characterized in that: Limiting components (300) and the transmission components are provided on both sides of the telescopic oil cylinder (200) in the second direction, and the first direction, the second direction and the third direction intersect in pairs.

8. A supporting device according to claim 1, characterized in that: The support plate (600) comprises a base (660), a ball socket is formed on the base (660), a slide seat (620) is provided on the ball socket, a ball head is formed at the end of the telescopic rod (230), when the telescopic rod (230) is fully retracted, the ball head and the ball socket maintain a preset distance, and when the telescopic rod (230) is extended to a first length, the ball head just contacts the ball socket.

9. A supporting device according to claim 8, characterized in that: The connecting rod mechanism (700) comprises a plurality of connecting rods arranged in parallel; the bottom end of each connecting rod is hinged to the base, and the top end is hinged to the mounting seat (410); The transmission assembly also includes: A rope group, comprising a retracting rope and an extending rope respectively arranged on both sides of the support (500) in a first direction; The first end and the second end of the retraction rope are fixed to the support (500) and the base, respectively, and pass through the second fixed pulley, the first fixed pulley and the fourth fixed pulley in sequence from the first end to the second end; the first fixed pulley is connected to the mounting seat (410); the second fixed pulley is arranged on the slide seat, and the fourth fixed pulley is arranged on the base; The first end and the second end of the extended rope are fixed to the support (500) and the base respectively, and pass through a movable pulley and a third fixed pulley in sequence from the first end to the second end; the movable pulley is arranged at a fixed bracket on the mounting seat (410) along the third direction, and the third fixed pulley is arranged on the base; The fixed bracket is provided with a tension spring (450) connected to the movable pulley; when the telescopic rod (230) is fully retracted, the movable pulley pulls the tension spring (450) downward to maintain tension; when the telescopic rod (230) is extended to a first length, the tension spring (450) is reset to allow the movable pulley to maintain a tendency to move upward.

10. An engineering machine, comprising the supporting device according to any one of claims 1 to 9.

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