Synchronous telescopic mechanism, movable platform and erecting vehicle of movable platform

Abstract

The utility model relates to a synchronous telescopic mechanism, a movable platform and an erecting vehicle of the movable platform. The synchronous telescopic mechanism comprises a middle cross beam, a motor arranged on the middle cross beam, a plurality of lead screws rotationally arranged on supporting beams on the two sides of the middle cross beam, and two connecting blocks arranged on the lead screws in a sleeving mode through nut threads. The two ends of the lead screw are provided with right-hand threads or left-hand threads respectively. The movable platform comprises two groups of platform plates which are arranged in parallel, and the synchronous telescopic mechanism is arranged in the middle of the two groups of platform plates; and a mobile crane and the mobile platform are mounted on the mobile platform erecting vehicle. The lifting device is simple in structure, good in synchronism in the stretching and retracting process, stable in gravity center position and high in lifting safety.

Description

Technical Field

[0001] The utility model relates to the technical field of railway mechanical equipment, in particular to a synchronous telescopic mechanism, a mobile platform and a vehicle for erecting the same. Background Art

[0002] Railway transportation has a large carrying capacity, fast transportation speed and high efficiency. It has always been the backbone of my country's cargo, equipment and material transportation and transshipment. However, railway transportation can only realize fixed point-to-point transportation and cannot load and unload materials or equipment in the middle or in areas without stations. With the development of railway transportation, more and more railway transportation customers require equipment that can set up temporary platforms in the middle of railway transportation or in areas without railway platforms.

[0003] The mobile platform is installed on the chassis of the erection vehicle. When in use, it is lifted and unfolded by the crane of the erection vehicle, and the mobile platform is laid between the railway flatbed car and the ground. The vehicles carried by the railway flatbed car can get on and off the railway flatbed car through the mobile platform. The mobile platform is equivalent to a temporary railway platform. The mobile platform erection vehicle is a vehicle that can build a temporary railway platform. This type of vehicle generally includes a mobile platform and a matching platform erection mechanism, which can realize the automatic construction and withdrawal of the temporary mobile platform. The mobile platform can be folded and retracted in the transportation state to meet the transportation size requirements. When erecting, the foldable parts at both ends can be unfolded and lengthened. At the same time, the platform board as a whole can be extended and widened to the left and right to meet the passage of various vehicles and equipment. The mobile platform of the prior art adopts a variety of structural forms to realize the folding and telescopic action of the platform board. In addition to the complex structure, there is also a problem that the center of gravity of the structure is offset during the folding and telescopic operation, resulting in poor structural stability, which is easy to cause shaking during hoisting, and the safety risk is high.

[0004] Chinese patent CN214783357U discloses a retractable platform, which has a fixed frame in the middle and movable frames on both sides. A guide mechanism and a telescopic oil cylinder are arranged between the fixed frame and the movable frame. The telescopic oil cylinder is connected to the fixed frame and the movable frame to drive the movable frame to extend and retract. Since the telescopic platform structure is driven by four oil cylinders, the synchronization of extension and retraction is difficult to ensure, and the center of gravity position changes continuously during extension and retraction, resulting in poor stability. In addition, after the movable frame is extended, its edge is overlapped with the fixed frame, which reduces the structural stability. The overlapped plate of the extended movable frame is limited by space and cannot be arranged with rib plates, resulting in poor bearing capacity.

[0005] Therefore, there is an urgent need for a mobile platform with a simple structure, good synchronization of the telescopic process, stable center of gravity position, and high lifting safety. Summary of the invention

[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a synchronous telescopic mechanism with a simple structure and good synchronization in the telescopic process, and a corresponding mobile platform and an erection vehicle, so that the center of gravity of the mobile platform is stable during the telescopic and folding process, the structural stability is improved, and the erection vehicle is more stable and safer when hoisting and erecting the mobile platform.

[0007] The purpose of the utility model is achieved in this way:

[0008] A synchronous telescopic mechanism comprises a middle crossbeam, a motor arranged on the middle crossbeam, a plurality of lead screws rotatably arranged on the supporting beams on both sides of the middle crossbeam, and two connecting blocks sleeved on each lead screw through a nut thread; the two ends of the lead screw are respectively provided with positive threads or negative threads; the motor drives the lead screw to rotate forward and reverse through a transmission mechanism, and the positive and reverse rotation of the lead screw drives the two connecting blocks to move closer and apart, that is, telescopic action.

[0009] Furthermore, the central axis of the lead screw is arranged parallel to the central axis of the middle cross beam.

[0010] Furthermore, the connecting block is hingedly connected to the nut.

[0011] Furthermore, the transmission mechanism is a sprocket chain transmission, including a main sprocket connected to the motor through a coupling, a slave sprocket arranged in the middle of the screw, and a chain connecting the main sprocket and the slave sprocket.

[0012] Furthermore, there are two lead screws, which are arranged on both sides of the middle crossbeam. The motor drives the two main sprockets to rotate synchronously, and the two main sprockets respectively drive the lead screws on both sides to rotate synchronously, and the four connecting blocks on the lead screws on both sides perform telescopic movements synchronously.

[0013] A mobile platform comprises two sets of platform plates arranged in parallel, wherein any one of the above-mentioned synchronous telescopic mechanisms is arranged in the middle of the two sets of platform plates, the two sets of platform plates are slidably mounted on the two ends of the middle cross beam respectively, and are respectively connected to the connecting blocks on the lead screw, the connecting blocks are driven by a motor to perform synchronous telescopic operation, thereby driving the two sets of platform plates to slide synchronously towards each other on the middle cross beam, thereby realizing the synchronous telescopic operation of the two sets of platform plates.

[0014] Furthermore, a hoisting pin for hoisting is provided on the middle cross beam.

[0015] Furthermore, a connecting rod mechanism is arranged between the ends of the two groups of platform panels to ensure the synchronous symmetry of the ends of the two groups of platform panels when they are extended or retracted, and includes an end cross beam, an X-link formed by two long links hinged in the middle, and a short link hingedly connected to the ends of the platform panels and the ends of the X-link; the ends of the platform panels are slidably mounted on the end cross beam, and the X-link and the short link coordinate the synchronous symmetry of the ends of the two groups of platform panels when they are retracting or retracting.

[0016] Furthermore, the platform board is hingedly connected at both ends of the platform board with a platform board extension section I and a platform board extension section II, respectively, and a folding cylinder is hingedly connected between the two extension sections and the platform board to control the folding or unfolding of the two extension sections.

[0017] Furthermore, a flip plate is hingedly connected in the middle of the platform plate. After the two sets of platform plates are retracted and closed, the flip plate is opened to facilitate lifting. After the two sets of platform plates are extended and unfolded, the flip plate is closed without affecting the loading and unloading of goods.

[0018] Furthermore, a plurality of reinforcing ribs are provided on the back side of the platform plate to strengthen the structural strength of the platform plate and improve the carrying capacity during cargo loading and unloading.

[0019] A mobile platform erection vehicle comprises a chassis and a crane, and any one of the above-mentioned mobile platforms is installed on the chassis.

[0020] Furthermore, the crane is arranged on the chassis frame for front and rear translation.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The synchronous telescopic mechanism of the utility model adopts a motor to drive a lead screw with positive and negative threads to rotate, driving the nut and the connecting block on the lead screw to move synchronously towards each other, thereby realizing a synchronous telescopic action;

[0023] The mobile platform of the utility model is provided with a synchronous telescopic mechanism and a connecting rod mechanism between two sets of platform boards, which control the synchronous extension or retraction of the two sets of platform boards, and ensure that different parts of the two sets of platform boards maintain synchronous symmetry during extension and retraction, thereby ensuring the stability of the overall structure of the mobile platform and the stability of the center of gravity position, and improving the safety of the hoisting operation;

[0024] The mobile platform erecting vehicle of the utility model has a simple structure, is convenient and efficient in the operation of erecting the mobile platform, and has good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of a synchronous telescopic mechanism.

[0026] Figure 2 The utility model is a top view of a synchronous telescopic mechanism.

[0027] Figure 3 The utility model is a schematic diagram of a motor drive structure of a synchronous telescopic mechanism.

[0028] Figure 4 The utility model is a schematic diagram of a screw assembly structure of a synchronous telescopic mechanism.

[0029] Figure 5The utility model is a structural schematic diagram of a mobile station.

[0030] Figure 6 The utility model is a schematic diagram of the structure of a mobile platform in a folded state.

[0031] Figure 7 The utility model is a bottom view of a platform plate of a mobile platform.

[0032] Figure 8 The utility model is a schematic diagram of the installation of a connecting rod mechanism of a mobile platform.

[0033] Fig. 9 The utility model is a structural schematic diagram of a mobile platform erection vehicle.

[0034] in:

[0035] Chassis 1, crane 2, mobile platform 3, platform plate extension section I4, platform plate 5, platform plate extension section II6, synchronous telescopic mechanism 7, connecting rod mechanism 8, flip plate 9, reinforcing rib 10, folding cylinder 11;

[0036] Middle cross beam 701, lead screw 702, connecting block 703, chain 704, motor 705, coupling 706, main sprocket 707, slave sprocket 708, hanging pin 709, nut 710;

[0037] End cross beam 801 , long connecting rod 802 , X connecting rod 803 , and short connecting rod 804 . DETAILED DESCRIPTION Example

[0038] See also Figure 1~Figure 4 The utility model relates to a synchronous telescopic mechanism, comprising a middle crossbeam 701, a motor 705 arranged on the middle crossbeam 701, a plurality of lead screws 702 rotatably arranged on the supporting beams on both sides of the middle crossbeam 701, and two connecting blocks 703 threadedly mounted on each lead screw 702 through a nut 710;

[0039] Both ends of the lead screw 702 are provided with positive threads or negative threads respectively, the central axis of the lead screw 702 is arranged parallel to the central axis of the middle cross beam 701, and the translation axes of the two connecting blocks 703 on each lead screw 702 are parallel to the central axis of the middle cross beam 701; the connecting block 703 is hingedly connected to the nut 710, and when the lead screw 702 rotates forward and backward, the connecting block 703 follows the nut 710 to perform translational action along the axis of the lead screw 702;

[0040] The motor 705 drives the lead screw 702 to rotate forward and backward through a transmission mechanism. The transmission mechanism is a sprocket chain transmission, which includes a main sprocket 707 connected to the motor 705 through a coupling 706, a slave sprocket 708 arranged in the middle of the lead screw 702, and a chain 704 connecting the main sprocket 707 and the slave sprocket 708. In the present embodiment, there are two lead screws 702, which are arranged on both sides of the middle cross beam 701. The motor 705 drives the two main sprockets 707 to rotate synchronously. The two main sprockets 707 respectively drive the lead screws 702 on both sides to rotate synchronously. The forward and reverse threads on the lead screw 702 are used to drive the four connecting blocks 703 on the lead screws 702 on both sides to perform telescopic movements synchronously. In another embodiment, the number of lead screws 702 can be four, with two on each side of the middle cross beam 701. The two lead screws 702 on the same side can also be synchronously driven by a chain sprocket. The forward and reverse rotation of the lead screw 702 drives the two connecting blocks 703 to move closer and apart, that is, to perform a telescopic action; since each lead screw 702 rotates synchronously, the two connecting blocks 703 on each lead screw 702 also perform a synchronous telescopic action. Example

[0041] See also Figure 5~Figure 8 The utility model relates to a mobile platform, comprising two sets of platform plates 5 arranged in parallel, wherein the synchronous telescopic mechanism 7 of the above-mentioned embodiment 1 is arranged in the middle of the two sets of platform plates 5, and the two sets of platform plates 5 are respectively slidably mounted on the two ends of the middle cross beam 701, and are respectively connected to the connecting blocks 703 on the lead screw 702, and the connecting blocks 703 are driven by the motor 705 to perform synchronous telescopic operation, thereby driving the two sets of platform plates 5 to synchronously slide toward each other on the middle cross beam 701, thereby realizing the synchronous telescopic operation of the two sets of platform plates 5;

[0042] A link mechanism 8 is provided between the ends of the two sets of platform boards 5 to ensure the synchronous symmetry of the ends of the two sets of platform boards 5 when they are extended and retracted, and includes an end crossbeam 801, an X-link 803 formed by two long links 802 hinged in the middle, and a short link 804 hingedly connected to the ends of the platform boards 5 and the ends of the X-link 803; the ends of the platform boards 5 are slidably mounted on the end crossbeam 801, and the diamond link mechanism composed of the X-link 803 and the short link 804 coordinates the synchronous symmetry of the ends of the two sets of platform boards 5 when they are extended and retracted;

[0043] By arranging a synchronous telescopic mechanism 7 in the middle of the two sets of platform plates 5 and a connecting rod mechanism 8 between the ends of the two sets of platform plates 5, the synchronization of the telescopic movement of the two sets of platform plates 5 is achieved, ensuring the stability of the center of gravity of the overall structure, making it more stable and safer during hoisting;

[0044] The front and rear ends of the platform board 5 are respectively hingedly connected with a platform board extension section I4 and a platform board extension section II6, and a folding cylinder 11 is hingedly connected between the two extension sections and the platform board 5 to control the folding or unfolding of the two extension sections;

[0045] The middle cross beam 701 is provided with a lifting pin 709 for lifting, and the middle part of the platform board 5 is hingedly connected with a flip plate 9. After the two groups of platform boards 5 are retracted and closed, the flip plate 9 is opened to expose the lifting position, which is convenient for lifting and avoids interference with the structure on the middle cross beam 701; after the two groups of platform boards 5 are extended and unfolded, the flip plate 9 is closed to make the middle section of the platform board 5 flush and fill the middle position of the platform board 5 to make it a completed driving passage without affecting the loading and unloading of goods; a plurality of reinforcing ribs 10 are provided on the back side of the platform board 5 to strengthen the structural strength of the platform board 5 and improve the carrying capacity during the loading and unloading of goods. Example

[0046] The positions of the synchronous telescopic mechanism 7 and the connecting rod mechanism 8 in the mobile platform of Example 2 are interchanged, that is, one set of synchronous telescopic mechanism is arranged between the two ends of the two groups of platform plates 5 to control the synchronous telescopic movement of the two ends of the two groups of platform plates 5; one set of connecting rod mechanism is arranged between the middle parts of the two groups of platform plates 5 to adjust the synchronous symmetry of the telescopic movement of the two groups of platform plates 5, thereby ensuring the stability of the overall structure and the center of gravity of the mobile platform during the telescopic process and improving the safety of lifting. Example

[0047] See also Fig. 9 The utility model relates to a mobile platform erection vehicle, comprising a chassis 1 and a crane 2. The mobile platform 3 of the above-mentioned embodiment 2 or embodiment 3 is installed on the chassis 1; the crane 2 is arranged on the chassis 1 frame for front and rear translation. When it is necessary to erect the mobile platform, the mobile platform 3 is lifted by the crane 2, and the two sets of platform boards 5 are extended differently by the synchronous telescopic mechanism 7 and the connecting rod mechanism 8 of the mobile platform 3, and the two extended sections are unfolded by the folding cylinder 11. During these operations, the center of gravity of the overall structure of the mobile platform does not deviate, making the lifting process smoother and safer; the unfolded mobile platform 3 is lifted to the railway position where loading and unloading is required, and the flip plate 9 is closed to make it a complete driving channel. When the mobile platform 3 needs to be folded after loading and unloading, the above steps are performed in reverse, and the mobile platform 3 can be folded and retracted and then installed back on the erection vehicle.

[0048] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A synchronous telescopic mechanism, characterized in that: The invention comprises a middle cross beam (701), a motor (705) arranged on the middle cross beam (701), a plurality of lead screws (702) rotatably arranged on the supporting beams on both sides of the middle cross beam (701), and two connecting blocks (703) threadedly sleeved on each lead screw (702) through a nut (710); both ends of the lead screw (702) are respectively provided with positive threads or negative threads; the motor (705) drives the lead screw (702) to rotate forward and reverse through a transmission mechanism, and the positive and reverse rotation of the lead screw (702) drives the two connecting blocks (703) to move closer and apart, that is, to perform a telescopic action.

2. The synchronous telescopic mechanism according to claim 1, characterized in that: The central axis of the lead screw (702) is arranged parallel to the central axis of the middle crossbeam (701).

3. The synchronous telescopic mechanism according to claim 1, characterized in that: The connection block (703) is hingedly connected to the nut (710).

4. The synchronous telescopic mechanism according to claim 1, characterized in that: The transmission mechanism is a sprocket chain transmission, comprising a main sprocket (707) connected to the motor (705) through a coupling (706), a slave sprocket (708) arranged in the middle of the lead screw (702), and a chain (704) connecting the main sprocket (707) and the slave sprocket (708).

5. The synchronous telescopic mechanism according to claim 4, characterized in that: There are two lead screws (702) disposed on both sides of the middle crossbeam (701). The motor (705) drives the two main sprockets (707) to rotate synchronously. The two main sprockets (707) respectively drive the lead screws (702) on both sides to rotate synchronously. The four connecting blocks (703) on the lead screws (702) on both sides perform telescopic movements synchronously.

6. A mobile platform, comprising two sets of platform plates (5) arranged in parallel, characterized in that: A synchronous telescopic mechanism (7) of any one of claims 1 to 5 is arranged in the middle of the two groups of platform plates (5). The two groups of platform plates (5) are slidably mounted on the two ends of the middle crossbeam (701) respectively, and are respectively connected to the connecting blocks (703) on the lead screw (702). The connecting blocks (703) are driven by the motor (705) to perform synchronous telescopic operation, thereby driving the two groups of platform plates (5) to slide synchronously towards each other on the middle crossbeam (701), thereby realizing the synchronous telescopic operation of the two groups of platform plates (5).

7. The mobile station according to claim 6, characterized in that: The middle cross beam (701) is provided with a hoisting pin (709) for hoisting.

8. The mobile station according to claim 6, characterized in that: A connecting rod mechanism (8) is arranged between the ends of the two groups of platform plates (5) to ensure the synchronous symmetry of the ends of the two groups of platform plates (5) when they are extended and retracted, and comprises an end crossbeam (801), an X-link (803) formed by two long links (802) hinged in the middle, and a short link (804) hingedly connected to the ends of the platform plates (5) and the ends of the X-link (803); the ends of the platform plates (5) are slidably mounted on the end crossbeam (801), and the X-link (803) and the short link (804) coordinate the synchronous symmetry of the ends of the two groups of platform plates (5) when they are extended and retracted.

9. The mobile station according to claim 6, characterized in that: The platform board (5) is hingedly connected at both ends thereof to a platform board extension section I (4) and a platform board extension section II (6), respectively. A folding cylinder (11) is hingedly connected between the two extension sections and the platform board (5) to control the folding or unfolding of the two extension sections.

10. The mobile station according to claim 6, characterized in that: The middle part of the platform plate (5) is hingedly connected with a flip plate (9). After the two sets of platform plates (5) are retracted and closed, the flip plate (9) is opened to facilitate lifting. After the two sets of platform plates (5) are extended and unfolded, the flip plate (9) is closed without affecting the loading and unloading of goods.

11. The mobile station according to claim 6, characterized in that: A plurality of reinforcing ribs (10) are provided on the back of the platform plate (5) to strengthen the structural strength of the platform plate (5) and improve the load-bearing capacity during cargo loading and unloading.

12. A mobile platform erection vehicle, characterized in that: The invention comprises a chassis (1) and a crane (2), wherein a mobile platform (3) according to any one of claims 6 to 11 is installed on the chassis (1).

13. The mobile platform erection vehicle according to claim 12, characterized in that: The crane (2) is arranged on the chassis (1) frame so as to be movable forward and backward.

Images