Lifting frame for high table transport

Abstract

The utility model discloses a kind of lifting frame for high platform conveying, including fixed frame, and be located on the lifting platform of fixed frame, transmission mechanism, hydraulic cylinder, front door, traction mechanism and back door;The utility model aims at when lifting platform is located at ground station, traction mechanism drives front door to keep in lifting position and present open state, back door is in closed state;When lifting platform is located at high platform station, back door is synchronously raised to open position, by traction mechanism so that front door is synchronously descended to closed position, realize lifting platform and front and back door linkage control, without independent control front and back door, personnel and material on the ground and high platform two sides can be protected, to reduce operation risk.

Description

Technical Field

[0001] This utility model relates to the technical field of material conveying, and in particular to a lifting frame for high-platform conveying. Background Technology

[0002] In the rust remover production process, bagged or barrelled rust remover raw materials need to be transported from the ground to a raised platform and fed into the feed port above the mixer. This is usually done with the help of a fixed vertical lifting platform. A traditional lifting platform usually consists of a fixed frame, a lifting platform, a hydraulic cylinder / electric cylinder and a safety door. During use, the lifting platform needs to move back and forth between the ground and the raised platform to complete the material transfer.

[0003] However, most existing lifting platform safety doors use independent control methods, meaning that the opening and closing of the front and rear safety doors requires manual operation or triggering via additional control signals. This operation method is highly dependent on the operator's standardized operation. If the operator is negligent and fails to close the front safety door before the lifting platform rises, or opens the rear safety door before the lifting platform has completely stopped, it can easily cause serious mechanical injury or a fall from height accident. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is as follows: a lifting frame for high platform conveying, including a fixed frame, and a lifting platform, a transmission mechanism, a hydraulic cylinder, a front gate, a traction mechanism and a rear gate disposed on the fixed frame. The hydraulic cylinder controls the lifting platform to move up and down within the fixed frame through the transmission mechanism. The front gate is slidably connected to the side of the fixed frame facing the ground, and the rear gate is slidably connected to the side of the fixed frame facing the high platform. The lifting platform drives the front gate to move in the opposite direction to the lifting platform through the traction mechanism, and the lifting platform drives the rear gate to move in the same direction as the lifting platform.

[0005] Using the above technical solution, when the lifting platform is at the ground workstation, the traction mechanism keeps the front gate in the raised position and open, facilitating the transfer of rust remover materials to the lifting platform by ground personnel. At the same time, the rear gate is in the lowered position and closed, effectively preventing personnel or objects on the high platform from accidentally falling. When the lifting platform is driven upward to the high platform workstation by the hydraulic cylinder, the traction mechanism causes the front gate to descend synchronously to the closed position, forming a protective barrier for the ground side. Simultaneously, the lifting platform directly drives the rear gate to rise synchronously to the open position, facilitating material retrieval by personnel on the high platform. This achieves linkage control between the lifting platform and the front and rear gates, eliminating the need for independent control of the front and rear gates, thus protecting operators and materials on both the ground and the sides of the high platform, thereby reducing operational risks.

[0006] The present invention is further configured such that the traction mechanism includes a pulley seat, a fixed pulley and a traction rope, the top of the fixed frame is provided with a pulley seat, the pulley seat is rotatably connected to the fixed pulley, one end of the traction rope is connected to the lifting platform, and the other end passes around the fixed pulley and is connected to the front door.

[0007] By adopting the above technical solution, the characteristics of the fixed pulley are used to realize that the lifting platform and the front door move in opposite directions, so as to meet the reverse linkage control of the lifting platform rising and the front door closing, and the lifting platform falling and the front door opening.

[0008] The present invention is further configured such that the rear door is provided with a top rod for abutting against the lifting platform, and the lifting platform moves the rear door upward through the top rod.

[0009] Furthermore, the lifting platform is provided with a limiting plate below the rear door for controlling the lowest point of the rear door.

[0010] Using the above technical solution, when the lifting platform rises, the lifting platform lifts the rear door to the raised position through the top rod. When the lifting platform descends, the rear door moves to the limit plate by its own weight and stops descending. That is, the lowest point of the rear door is controlled by the limit plate, thereby achieving compatibility with platforms of different heights.

[0011] The present invention is further configured such that slide rails are provided on both sides of the fixed frame, and the front door / rear door is slidably connected to the fixed frame through the slide rails.

[0012] To ensure the smooth operation of the front and rear doors, symmetrically distributed slide rails are installed on both sides of the fixed frame to prevent the front and rear doors from getting stuck during movement.

[0013] The present invention is further configured such that the transmission mechanism includes a lifting rod, a sprocket, and a chain; the output end of the hydraulic cylinder is located in the middle of the lifting rod; the lifting rod is rotatably connected to the sprockets that mesh with the chain on both sides of the hydraulic cylinder; one end of the chain is fixedly connected to the fixed frame, and the other end passes around the sprocket and is fixedly connected to the lifting platform.

[0014] Using the above technical solution, when the output end of the hydraulic cylinder controls the lifting rod to rise, since the chain length is constant, the chain and sprocket engage, causing the upward stroke of the lifting rod to be converted into the chain's upward traction on the lifting platform, thereby driving the lifting platform to rise synchronously, achieving a 1:2 ratio between the stroke of the hydraulic cylinder and the stroke of the lifting platform; conversely, when the output end of the hydraulic cylinder resets, the lifting rod descends under its own weight, thereby driving the lifting platform to descend synchronously.

[0015] The present invention is further configured such that the fixing frame is provided with a square tube and a fixing horizontal plate, the fixing horizontal plate being vertically distributed on the square tube, and the transmission mechanism further includes a roller one and a roller two corresponding to two adjacent right-angled surfaces of the square tube, and the two ends of the lifting rod are rotatably connected to roller one and roller two.

[0016] Furthermore, the lifting platform is provided with symmetrically distributed transmission mechanisms and hydraulic cylinders on its left and right sides.

[0017] Using the above technical solution, the lifting rod is kept horizontal at both ends by the cooperation of roller one and roller two with the square tube. The lifting platform is equipped with two sets of lifting rods, and each set of lifting rods is equipped with two traction points for controlling the lifting platform, so that the lifting platform has four traction points distributed in a rectangle, avoiding the risk of tilting, twisting or jamming of the lifting platform during movement.

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the front door direction of this utility model; Figure 2 This is a structural schematic diagram of the rear door direction of this utility model; Figure 3 This utility model Figure 2 A magnified view of the central A-direction view; Figure 4 This utility model Figure 2 A magnified view of the central B-direction view; Figure 5 This is a structural diagram of the lifting platform of this utility model when it is located at a ground workstation; Figure 6 This is a structural schematic diagram of the lifting platform of this utility model when it is located at a high platform work position; Among them: 1-fixed frame, 2-lifting platform, 3-transmission mechanism, 4-hydraulic cylinder, 5-front gate, 6-traction mechanism, 7-rear gate, 10-slide rail, 11-square tube, 12-fixed cross plate, 31-lifting rod, 32-sprocket, 33-chain, 34-roller one, 35-roller two, 61-pulley seat, 62-fixed pulley, 63-traction rope, 71-top rod, 72-limiting plate; Detailed Implementation

[0020] The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0021] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the intentions or conventions of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0022] like Figure 1 , 2 As shown, this utility model provides a lifting frame for high-platform transport, including a fixed frame 1, and a lifting platform 2, a transmission mechanism 3, a hydraulic cylinder 4, a front gate 5, a traction mechanism 6, and a rear gate 7 mounted on the fixed frame 1. The hydraulic cylinder 4 controls the lifting platform 2 to move up and down within the fixed frame 1 through the transmission mechanism 3. The front gate 5 is slidably connected to the side of the fixed frame 1 facing the ground, and the rear gate 7 is slidably connected to the side of the fixed frame 1 facing the high platform. The lifting platform 2 drives the front gate 5 to move in the opposite direction to the lifting platform 2 through the traction mechanism 6, and the lifting platform 2 drives the rear gate 7 to move in the same direction as the lifting platform 2.

[0023] Combination Figure 3 As shown, in this embodiment, the traction mechanism 6 includes a pulley seat 61, a fixed pulley 62, and a traction rope 63. The top of the fixed frame 1 is provided with a pulley seat 61, and the fixed pulley 62 is rotatably connected to the pulley seat 61. One end of the traction rope 63 is connected to the lifting platform 2, and the other end passes around the fixed pulley 62 and is connected to the front gate 5. By utilizing the characteristics of the fixed pulley 62, the lifting platform 2 and the front gate 5 move in opposite directions to satisfy the reverse linkage control of the lifting platform 2 rising and the front gate 5 closing, and the lifting platform 2 falling and the front gate 5 opening.

[0024] In this embodiment, the rear door 7 is provided with a push rod 71 for abutting against the lifting platform 2. The lifting platform 2 moves the rear door 7 upward through the push rod 71. The lifting platform 2 is provided with a limiting plate 72 below the rear door 7 for controlling the lowest point of the rear door 7. When the lifting platform 2 rises, the lifting platform 2 lifts the rear door 7 to the raised position through the push rod 71. When the lifting platform 2 descends, the rear door 7 moves to the limiting plate 72 by its own weight and then stops descending. That is, the lowest point of the rear door 7 is controlled by the limiting plate 72, thereby achieving adaptation to platforms of different heights.

[0025] In this embodiment, slide rails 10 are provided on both sides of the fixed frame 1. The front door 5 and the rear door 7 are slidably connected to the fixed frame 1 through the slide rails 10. In order to make the front door 5 and the rear door 7 run smoothly, slide rails 10 are symmetrically distributed on both sides of the fixed frame 1 to avoid the front door 5 and the rear door 7 from getting stuck during movement.

[0026] Combination Figure 4As shown, in this embodiment, the transmission mechanism 3 includes a lifting rod 31, a sprocket 32, and a chain 33. The output end of the hydraulic cylinder 4 is located in the middle of the lifting rod 31. The lifting rod 31 is rotatably connected to the sprocket 32 ​​on both sides of the hydraulic cylinder 4, which meshes with the chain 33. One end of the chain 33 is fixedly connected to the fixed frame 1, and the other end passes around the sprocket 32 ​​and is fixedly connected to the lifting platform 2. When the output end of the hydraulic cylinder 4 controls the lifting rod 31 to rise, since the length of the chain 33 is constant, the chain 33 and the sprocket 32 ​​mesh, so that the upward stroke of the lifting rod 31 is converted into the upward traction of the chain 33 on the lifting platform 2, thereby driving the lifting platform 2 to rise synchronously. Conversely, when the output end of the hydraulic cylinder 4 is reset, the lifting rod 31 descends by its own weight, thereby driving the lifting platform 2 to descend synchronously.

[0027] In this embodiment, the fixed frame 1 is provided with a square tube 11 and a fixed horizontal plate 12. The fixed horizontal plate 12 is vertically distributed on the square tube 11. The transmission mechanism 3 also includes a roller 34 and a roller 35 corresponding to two adjacent right angle surfaces of the square tube 11. The two ends of the lifting rod 31 are rotatably connected to the roller 34 and the roller 35. The left and right sides of the lifting platform 2 are provided with symmetrically distributed transmission mechanisms 3 and hydraulic cylinders 4. The two ends of the lifting rod 31 cooperate with the square tube 11 through the roller 34 and the roller 35, so that the lifting rod 31 always remains in a horizontal state. The lifting platform 2 is provided with two sets of lifting rods 31, and each set of lifting rods 31 is provided with two traction points for controlling the lifting platform 2, so that the lifting platform 2 is provided with four traction points distributed in a rectangle, avoiding the risk of tilting, twisting or jamming of the lifting platform 2 during movement.

[0028] Combination Figure 5 , 6 As shown, the working principle of this utility model is as follows: when the lifting platform 2 is located at the ground work position, the traction mechanism 6 drives the front gate 5 to remain in the raised position and in the open state, which facilitates the transfer of rust remover raw materials to the lifting platform 2 by the ground workers. At the same time, the rear gate 7 is in the lowered position and in the closed state, effectively preventing personnel or objects on the high platform side from accidentally falling. When the lifting platform 2 is driven upward to the high platform work position by the hydraulic cylinder 4, the traction mechanism 6 is linked to cause the front gate 5 to descend synchronously to the closed position, forming a protective barrier for the ground side. At the same time, the lifting platform 2 directly drives the rear gate 7 to rise synchronously to the open position, which is convenient for personnel at the high platform to retrieve materials. The lifting platform 2 and the front and rear gates 7 are linked for control, eliminating the need for independent control of the front and rear gates 7, protecting the operators and materials on the ground and both sides of the high platform, thereby reducing operational risks.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator for high table transport, characterized in that, It includes a fixed frame (1), and a lifting platform (2), a transmission mechanism (3), a hydraulic cylinder (4), a front gate (5), a traction mechanism (6), and a rear gate (7) mounted on the fixed frame (1). The hydraulic cylinder (4) controls the lifting platform (2) to move up and down within the fixed frame (1) through the transmission mechanism (3). The front gate (5) is slidably connected to the side of the fixed frame (1) facing the ground, and the rear gate (7) is slidably connected to the side of the fixed frame (1) facing the platform. The lifting platform (2) drives the front gate (5) to move in the opposite direction to the lifting platform (2) through the traction mechanism (6), and the lifting platform (2) drives the rear gate (7) to move in the same direction as the lifting platform (2). The transmission mechanism (3) includes a lifting rod (31), a sprocket (32) and a chain (33). The output end of the hydraulic cylinder (4) is located in the middle of the lifting rod (31). The lifting rod (31) is rotatably connected to the sprocket (32) that meshes with the chain (33) on both sides of the hydraulic cylinder (4). One end of the chain (33) is fixedly connected to the fixed frame (1), and the other end passes around the sprocket (32) and is fixedly connected to the lifting platform (2).

2. The lifting frame for high-platform conveying according to claim 1, characterized in that: The traction mechanism (6) includes a pulley seat (61), a fixed pulley (62) and a traction rope (63). The top of the fixed frame (1) is provided with a pulley seat (61), and the pulley seat (61) is rotatably connected to the fixed pulley (62). One end of the traction rope (63) is connected to the lifting platform (2), and the other end passes around the fixed pulley (62) and is connected to the front door (5).

3. A lifting frame for high-platform conveying according to claim 2, characterized in that: The rear door (7) is provided with a push rod (71) for abutting against the lifting platform (2), and the lifting platform (2) moves the rear door (7) upward through the push rod (71).

4. A lifting frame for high-platform conveying according to claim 3, characterized in that: The lifting platform (2) is located below the rear gate (7) and is equipped with a limiting plate (72) for controlling the lowest point of the rear gate (7).

5. A lifting frame for high-platform conveying according to claim 2, 3, or 4, characterized in that: The fixed frame (1) is provided with slide rails (10) on both sides, and the front door (5) / rear door (7) are slidably connected to the fixed frame (1) through the slide rails (10).

6. A lifting frame for high-platform conveying according to claim 1, characterized in that: The fixed frame (1) is provided with a square tube (11) and a fixed horizontal plate (12). The fixed horizontal plate (12) is vertically distributed on the square tube (11). The transmission mechanism (3) also includes a roller one (34) and a roller two (35) corresponding to two adjacent right angle surfaces of the square tube (11). The two ends of the lifting rod (31) are rotatably connected to the roller one (34) and the roller two (35).

7. A lifting frame for high-platform conveying according to claim 6, characterized in that: The lifting platform (2) is provided with symmetrically distributed transmission mechanisms (3) and hydraulic cylinders (4) on its left and right sides.

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