Multi-stage telescopic device

Abstract

The invention discloses a multi-stage telescopic device which comprises a support, a first telescopic platform capable of moving along the support and a second telescopic platform capable of moving along the first telescopic platform, and first telescopic supporting legs are arranged on the first telescopic platform. When the multi-stage telescopic device is used, the first telescopic platform moves and stretches out along the support, and then the first telescopic supporting legs stretch out to support the first telescopic platform, so that the first telescopic platform forms a simple supporting structure. And finally, the second telescopic platform for bearing the load moves and stretches out along the first telescopic platform, it can be ensured that the gravity center is always kept in a simply-supported structure, the overall structure is simple, stability is good, rigidity is high, compared with a cantilever structure, the specification of a supporting component or additional balance weight does not need to be increased, and the device self-weight and cost can be reduced easily.

Description

Technical Field

[0001] This invention relates to the field of engineering equipment technology, and in particular to a multi-stage telescopic device. Background Technology

[0002] In the engineering field, using telescopic platforms for load transfer is a common practice. However, existing telescopic platforms are basically similar to the telescopic boom of a crane. When transferring loads, the telescopic platform gradually becomes a cantilever mechanism as the load moves. Furthermore, as the telescopic distance increases, the cantilever length also increases. This not only reduces the stability of the equipment but also places high demands on the strength of the cantilever structure. In addition, to address the issue of center of gravity shift, it is necessary to increase the specifications of its support components or add extra counterweights to offset the center of gravity shift caused by the movement of the load, resulting in increased equipment weight and additional costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-stage telescopic device with simple structure, good stability, high rigidity, and cost-saving advantages.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A multi-stage telescopic device includes a support frame, a first telescopic platform movable along the support frame, and a second telescopic platform movable along the first telescopic platform, wherein the first telescopic platform is provided with a first telescopic support leg.

[0005] As a further improvement to the above technical solution: the first telescopic platform is provided with first telescopic beams on both sides, the telescopic direction of the first telescopic beams is perpendicular to the moving direction of the first telescopic platform, and the first telescopic outriggers are provided on the first telescopic beams.

[0006] As a further improvement to the above technical solution: the bracket is provided with a first guide rail, the first telescopic platform is provided with a second guide rail and a first guide member that cooperates with the first guide rail, the second guide rail is arranged parallel to the first guide rail, one end of the second telescopic platform is provided with a second guide member that cooperates with the first guide rail, and the other end of the second telescopic platform is provided with a third guide member that cooperates with the second guide rail.

[0007] As a further improvement to the above technical solution: the first telescopic outrigger and the first guide member are respectively disposed at both ends of the first telescopic platform, and the first guide member is disposed between the second guide member and the third guide member.

[0008] As a further improvement to the above technical solution: the first guide rail and the second guide rail are C-shaped guide rails, and the first guide member, the second guide member and the third guide member are rollers.

[0009] As a further improvement to the above technical solution: the first guide rail is provided on both sides of the bracket, and the second guide rail is provided on both sides of the first telescopic platform.

[0010] As a further improvement to the above technical solution: the bracket is provided with support rollers for supporting the first telescopic platform.

[0011] As a further improvement to the above technical solution: the multi-stage telescopic device also includes a lifting mechanism, and the bracket is connected to the lifting mechanism.

[0012] As a further improvement to the above technical solution: the lifting mechanism includes a base and a plurality of lifting drive components disposed on the base, the lifting drive components being connected to the bracket.

[0013] As a further improvement to the above technical solution: the base is provided with a second telescopic beam on both sides, the telescopic direction of the second telescopic beam is perpendicular to the moving direction of the first telescopic platform, and the second telescopic beam is provided with a second telescopic support leg.

[0014] Compared with the prior art, the advantages of the present invention are as follows: The multi-stage telescopic device disclosed in this invention, in use, involves a first telescopic platform moving and extending along a support frame, followed by the extension of a first telescopic leg to provide support for the first telescopic platform, thus forming a simply supported structure. Finally, a second telescopic platform, responsible for bearing the load, moves and extends along the first telescopic platform. This ensures that the center of gravity remains within the simply supported structure, resulting in a simple overall structure with good stability and high rigidity. Compared to cantilever structures, it eliminates the need to increase the specifications of supporting components or add additional counterweights, thereby reducing equipment weight and cost.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the initial state of the multi-stage telescopic device of the present invention. Figure 2 This is a three-dimensional structural diagram of the support frame after it has been lifted in this invention.

[0017] Figure 3 This is a three-dimensional structural diagram of the first telescopic platform after it has been extended in this invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the second telescopic platform after it has been extended in this invention.

[0019] Figure 5 This is a schematic diagram of the main structure of the first telescopic platform after it has been extended in this invention.

[0020] Figure 6 This is a schematic diagram of the main structure of the second telescopic platform after it has been extended in this invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the bracket in this invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the first telescopic platform in this invention.

[0023] Figure 9 This is a three-dimensional structural diagram of the second telescopic platform in this invention.

[0024] Figure 10 This is a three-dimensional structural diagram of the lifting mechanism in this invention.

[0025] The labels in the diagram represent: 1. Bracket; 11. First guide rail; 12. Support roller; 2. First telescopic platform; 21. First telescopic outrigger; 22. First telescopic beam; 23. Second guide rail; 24. First guide component; 3. Second telescopic platform; 31. Second guide component; 32. Third guide component; 4. Lifting mechanism; 41. Base; 42. Lifting drive component; 43. Second telescopic beam; 44. Second telescopic outrigger. Detailed Implementation

[0026] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Figures 1 to 10 An embodiment of the multi-stage telescopic device of the present invention is shown. This embodiment includes a support 1, a first telescopic platform 2 movable along the support 1, and a second telescopic platform 3 movable along the first telescopic platform 2. The first telescopic platform 2 is provided with a first telescopic support leg 21. See details. Figures 6 to 10 Preferably, the bracket 1, the first telescopic platform 2, the second telescopic platform 3, and the base 41 adopt a frame structure welded from longitudinal beams and transverse beams, which is lightweight and has high structural strength. The first telescopic platform 2 and the second telescopic platform 3 can be driven to extend and retract by cylinders, oil cylinders, electric push rods, etc., or some or all of the rollers on them can be equipped with rotating drive components (such as motors, hydraulic motors, etc.) to achieve movement along the corresponding guide rails, which will not be elaborated further.

[0031] In this embodiment of the multi-stage telescopic device, during use, the first telescopic platform 2 first moves and extends along the support 1, and then the first telescopic leg 21 extends to provide support for the first telescopic platform 2, so that the first telescopic platform 2 constitutes a simply supported structure, as detailed below. Figure 3 and Figure 5 As shown. Finally, the second telescopic platform 3, which bears the load, moves and extends along the first telescopic platform 2, as specifically... Figure 4 and Figure 6 As shown, this design ensures that the center of gravity remains within the simply supported structure, resulting in a simple overall structure with good stability and high stiffness. Compared to cantilever structures, it eliminates the need to increase the specifications of supporting components or add extra counterweights, which helps reduce the weight and cost of the equipment.

[0032] Further details can be found in the following documents. Figure 8In this embodiment, the first telescopic platform 2 is provided with first telescopic beams 22 on both sides. The telescopic direction of the first telescopic beams 22 is perpendicular to the moving direction of the first telescopic platform 2, and the first telescopic support legs 21 are provided on the first telescopic beams 22. The first telescopic beams 22 can increase the distance between the first telescopic support legs 21 on the left and right sides, providing more reliable support for the first telescopic platform 2. The first telescopic beams 22 and the first telescopic support legs 21 can be driven to telescopically extend and retract, for example, by means of cylinders, hydraulic cylinders, or lead screw and nut mechanisms.

[0033] Further details can be found in the following documents. Figures 7 to 9 In this embodiment, the support 1 is provided with a first guide rail 11, the first telescopic platform 2 is provided with a second guide rail 23 and a first guide member 24 that cooperates with the first guide rail 11. The second guide rail 23 is arranged parallel to the first guide rail 11. One end of the second telescopic platform 3 is provided with a second guide member 31 that cooperates with the first guide rail 11, and the other end of the second telescopic platform 3 is provided with a third guide member 32 that cooperates with the second guide rail 23. The first guide rail 11 and the first guide member 24 cooperate to provide guidance for the movement of the first telescopic platform 2, preventing deviation and shaking. The first guide rail 11, the second guide rail 23, the second guide member 31 and the third guide member 32 cooperate to provide guidance for the movement of the second telescopic platform 3, preventing deviation and shaking. The structure is simple and effective.

[0034] See details Figures 5 to 6 In this embodiment, the first telescopic support leg 21 and the first guide member 24 are respectively disposed at both ends of the first telescopic platform 2. The first guide member 24 is disposed between the second guide member 31 and the third guide member 32, which can avoid the second guide member 31 and the third guide member 32 interfering with the movement of the first guide member 24. The structure is simple and the layout is reasonable.

[0035] In a preferred embodiment, the first guide rail 11 and the second guide rail 23 are C-shaped guide rails, and the first guide member 24, the second guide member 31, and the third guide member 32 are rollers. Using rollers for the first guide member 24, the second guide member 31, and the third guide member 32 reduces resistance during movement, making the extension and retraction process smoother. Of course, in other embodiments, the first guide member 24, the second guide member 31, and the third guide member 32 can also be sliders, etc. The C-shaped guide rail can provide vertical and horizontal limits for the rollers, which helps to prevent offset and wobbling during extension and retraction, resulting in good reliability. Specifically, the first guide rail 11 and the second guide rail 23 can be made of I-beams or channel steel, which is convenient for processing and manufacturing.

[0036] In a preferred embodiment, the first guide rail 11 is provided on both sides of the bracket 1, and the second guide rail 23 is provided on both sides of the first telescopic platform 2. Correspondingly, the first guide member 24 is provided on both sides of the first telescopic platform 2, and the second guide member 31 and the third guide member 32 are provided on both sides of the second telescopic platform 3. The symmetry and balance are good, and it can play a good guiding role.

[0037] See details Figure 7 In this embodiment, the support 1 is provided with a support roller 12 for supporting the first telescopic platform 2, which can reduce the frictional resistance and wear between the first telescopic platform 2 and the support 1, making the first telescopic platform 2 move more smoothly.

[0038] Furthermore, in this embodiment, the multi-stage telescopic device also includes a lifting mechanism 4, and the bracket 1 is connected to the lifting mechanism 4. Specifically, as follows... Figure 2 and Figure 3 As shown, when it is necessary to transfer the load to a higher position (such as the steps formed at the working face in the tunnel using stepped excavation construction), the lifting mechanism 4 can lift the support 1, the first telescopic platform 2 and the second telescopic platform 3 as a whole, and then the first telescopic platform 2 extends above the steps, further increasing the range of use of the equipment.

[0039] See details Figure 10 In this embodiment, the lifting mechanism 4 includes a base 41 and a plurality of lifting drive components 42 (such as cylinders, hydraulic cylinders, or electric push rods) disposed on the base 41. The lifting drive components 42 are connected to the bracket 1. Preferably, the lifting drive components 42 are disposed around the base 41, which can realize the smooth lifting and lowering of the bracket 1.

[0040] Furthermore, in this embodiment, the base 41 is provided with second telescopic beams 43 on both sides. The telescopic direction of the second telescopic beams 43 is perpendicular to the moving direction of the first telescopic platform 2. The second telescopic beams 43 are provided with second telescopic legs 44. After the equipment is in place, the second telescopic beams 43 first extend to the left and right sides, and then the second telescopic legs 44 extend downward to contact the ground, adjusting the base 41 to a horizontal state. At the same time, it can provide stable support for the base 41 to prevent overturning. The structure is simple and effective.

[0041] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A multi-stage telescopic device, characterized in that: It includes a support (1), a first telescopic platform (2) movable along the support (1), and a second telescopic platform (3) movable along the first telescopic platform (2), wherein the first telescopic platform (2) is provided with a first telescopic support leg (21).

2. The multi-stage telescopic device according to claim 1, characterized in that: The first telescopic platform (2) is provided with first telescopic beams (22) on both sides. The telescopic direction of the first telescopic beams (22) is perpendicular to the moving direction of the first telescopic platform (2). The first telescopic support leg (21) is provided on the first telescopic beam (22).

3. The multi-stage telescopic device according to claim 1, characterized in that: The bracket (1) is provided with a first guide rail (11), the first telescopic platform (2) is provided with a second guide rail (23) and a first guide member (24) that cooperates with the first guide rail (11). The second guide rail (23) is arranged parallel to the first guide rail (11). One end of the second telescopic platform (3) is provided with a second guide member (31) that cooperates with the first guide rail (11), and the other end of the second telescopic platform (3) is provided with a third guide member (32) that cooperates with the second guide rail (23).

4. The multi-stage telescopic device according to claim 3, characterized in that: The first telescopic outrigger (21) and the first guide (24) are respectively located at both ends of the first telescopic platform (2), and the first guide (24) is located between the second guide (31) and the third guide (32).

5. The multi-stage telescopic device according to claim 3, characterized in that: The first guide rail (11) and the second guide rail (23) are C-shaped guide rails, and the first guide member (24), the second guide member (31) and the third guide member (32) are rollers.

6. The multi-stage telescopic device according to claim 3, characterized in that: The first guide rail (11) is located on both sides of the bracket (1), and the second guide rail (23) is located on both sides of the first telescopic platform (2).

7. The multi-stage telescopic device according to claim 1, characterized in that: The support (1) is provided with rollers (12) for supporting the first telescopic platform (2).

8. The multi-stage telescopic device according to any one of claims 1 to 7, characterized in that: It also includes a lifting mechanism (4), and the bracket (1) is connected to the lifting mechanism (4).

9. The multi-stage telescopic device according to claim 8, characterized in that: The lifting mechanism (4) includes a base (41) and a plurality of lifting drive members (42) disposed on the base (41), the lifting drive members (42) being connected to the bracket (1).

10. The multi-stage telescopic device according to claim 9, characterized in that: The base (41) is provided with a second telescopic beam (43) on both sides. The telescopic direction of the second telescopic beam (43) is perpendicular to the moving direction of the first telescopic platform (2). The second telescopic beam (43) is provided with a second telescopic support leg (44).

Images