Crane working platform jacking mechanism

Abstract

The invention belongs to the technical field of jacking mechanisms, and particularly relates to a jacking mechanism for a crane working platform. Through cooperation of the first rotating shaft, the second rotating shaft, the connecting rod, the two-way lead screw, the movable rod and the first hollow rod, the placing plate can be supported through a plurality of supporting points, so that the overall stability of the placing plate can be improved, the working safety of workers can be improved, and the requirements of users can be met. According to the device, through cooperation of a threaded rod, a driving bevel gear, a driven bevel gear and a fixing rod, the overall height of the protection net can be adjusted according to the requirements of a user, so that the protection range of the device can be expanded, the possibility that workers fall down accidentally is reduced, and then the practicability of the device can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of jacking mechanisms, and in particular relates to a jacking mechanism for a crane working platform. Background Art

[0002] A crane is a motorized equipment used to transport and lift heavy objects. It is usually composed of a frame, a boom, a lifting mechanism and a cab. Cranes are widely used because of their own advantages. The crane working platform refers to a platform installed on the crane. This platform usually has safety railings and other protective measures to ensure the safety of the staff. When the crane platform is in use, a jacking mechanism is required to achieve vertical jacking of the platform so that the staff can perform operations at different heights.

[0003] At present, most of the existing crane working platform jacking mechanisms on the market only realize the lifting and lowering activities of the crane platform through hydraulic rods. This method has only one supporting point of the hydraulic rod. When the weight on the working platform is too heavy, it will affect its installation stability, thereby reducing the work safety of the staff and cannot meet the needs of users. Therefore, the present invention designs a crane working platform jacking mechanism based on the technical problems raised. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a crane working platform jacking mechanism, which aims to improve the problem of low safety of the crane working platform jacking mechanism in the prior art when in use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lifting mechanism for a crane working platform comprises a base and a connecting rod, an open groove is provided in the middle of the top of the base, a servo motor is fixedly connected to the right side of the base, the output end of the servo motor passes through the open groove and is fixedly connected to a bidirectional screw rod, the left and right sides of the outer wall of the bidirectional screw rod are threadedly connected with movable blocks, the top of the movable block is rotatably connected with a first rotating shaft, a placement plate is provided above the base, the left and right sides of the middle of the bottom end of the placement plate are fixedly connected with a U-shaped plate, the inside of the U-shaped plate is rotatably connected with a second rotating shaft, two second rotating shafts are respectively connected to the corresponding first rotating shafts through the connecting rod, the first hollow rod is fixedly connected to the inside of the first hollow rod for sliding connection, the second hollow rod is slidably connected to the inside of the second hollow rod for sliding connection, the third hollow rod is slidably connected to the inside of the fourth hollow rod for sliding connection, the top of the four movable rods are respectively fixedly connected to the four corners of the bottom of the placement plate, and a protective mechanism is provided on the top of the placement plate.

[0007] Further, the protective mechanism includes a hollow frame, the hollow frames are equidistantly fixedly connected to the top of the placement plate around, the hollow frame is slidably connected to a protective net inside, the top of the placement plate is fixedly connected to multiple corners of the top of the placement plate, the top left front end of the top of the placement plate is rotatably connected to a threaded rod, the top of the placement plate is provided with multiple hollow columns, the top of the fixing rod is respectively fixedly connected to the corresponding inner top of the hollow column, the top of the threaded rod is rotatably connected to the corresponding inner top of the hollow column, the outer sides of the threaded rod and the fixing rod are provided with sliders, the outer walls of the multiple hollow columns are provided with multiple sliding grooves, the sliders are respectively slidably connected to the corresponding inner sides of the sliding grooves, the two sides of the protective net are respectively fixedly connected to one end of the corresponding slider, the front wall of the hollow column at the left front end is fixedly connected to a servo motor, the output end of the servo motor passes through the corresponding hollow column and is fixedly connected to an active bevel gear, the middle and lower part of the outer side of the threaded rod is fixedly connected to a driven bevel gear, and the driven bevel gear is meshed with the active bevel gear.

[0008] Furthermore, a switch is fixedly connected to the rear side of the hollow frame on the front side, and the switch is electrically connected to the servo motor and the servo motor respectively.

[0009] Furthermore, a protective cover is provided on the outer side of the switch, and the top of the protective cover is rotatably connected to the rear side of the corresponding hollow frame through a movable shaft.

[0010] Furthermore, the two movable blocks are both slidably connected inside the open groove.

[0011] Furthermore, a warning sign is fixedly connected to one side of each of the hollow frames.

[0012] Furthermore, the sizes of the plurality of protective nets respectively match the internal sizes of the corresponding hollow frames.

[0013] The left end of the bidirectional screw rod is rotatably connected to the inner left side of the open slot.

[0014] Beneficial effects of the present invention:

[0015] 1. In the present invention, through the cooperation between the first rotating shaft, the second rotating shaft, the connecting rod, the bidirectional screw rod, the movable rod and the first hollow rod, the placement plate can be supported by multiple supporting points, thereby increasing the overall stability of the placement plate, thereby improving the work safety of the staff and meeting the needs of users.

[0016] 2. In the present invention, through the cooperation between the threaded rod, the active bevel gear, the driven bevel gear and the fixed rod, the overall height of the protective net can be adjusted according to the needs of the user, thereby expanding its protection range, reducing the possibility of accidental falls of workers, and further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a jacking mechanism of a crane working platform of the present invention;

[0018] Figure 2 It is a top view of a partial structural cross-sectional view of a jacking mechanism of a crane working platform of the present invention;

[0019] Figure 3 A cross-sectional view of the base structure of a jacking mechanism for a crane working platform of the present invention;

[0020] Figure 4 The present invention is a cross-sectional view of a hollow column structure of a jacking mechanism of a crane working platform.

[0021] In the figure: 1. base; 2. protection mechanism; 201. hollow frame; 202. protection net; 203. fixed rod; 204. threaded rod; 205. hollow column; 206. slide groove; 207. slider; 208. servo motor; 209. active bevel gear; 210. driven bevel gear; 3. open groove; 4. servo motor; 5. bidirectional screw rod; 6. movable block; 7. first rotating shaft; 8. placement plate; 9. U-shaped plate; 10. second rotating shaft; 11. connecting rod; 12. first hollow rod; 13. second hollow rod; 14. third hollow rod; 15. fourth hollow rod; 16. movable rod; 17. switch; 18. protective cover; 19. warning sign. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0023] Reference Figure 1 and Figure 3An embodiment of the present invention is as follows: a lifting mechanism for a crane working platform comprises a base 1 and a connecting rod 11, an opening slot 3 is provided in the middle of the top of the base 1, a servo motor 4 is fixedly connected to the right side of the base 1, an output end of the servo motor 4 passes through the opening slot 3 and is fixedly connected to a bidirectional screw rod 5, a movable block 6 is threadedly connected to the left and right sides of the outer wall of the bidirectional screw rod 5, a first rotating shaft 7 is rotatably connected to the top of the movable block 6, a placing plate 8 is arranged above the base 1, a U-shaped plate 9 is fixedly connected to the left and right sides of the middle of the bottom end of the placing plate 8, a second rotating shaft 10 is rotatably connected to the inside of the U-shaped plate 9, two second rotating shafts 10 are respectively connected to the corresponding first rotating shaft 7 through the connecting rod 11, and the upper surface of the base 1 is four A first hollow rod 12 is fixedly connected at each corner, a second hollow rod 13 is slidably connected inside the first hollow rod 12, a third hollow rod 14 is slidably connected inside the second hollow rod 13, a fourth hollow rod 15 is slidably connected inside the third hollow rod 14, a movable rod 16 is slidably connected inside the fourth hollow rod 15, the top ends of the four movable rods 16 are respectively fixedly connected at the four corners of the bottom of the placement plate 8, a protective mechanism 2 is provided on the top of the placement plate 8, the left end of the two-way screw rod 5 is rotatably connected to the left side of the inside of the opening slot 3, the sizes of the multiple protective nets 202 are respectively matched with the internal sizes of the corresponding hollow frames 201, and the two movable blocks 6 are both slidably connected inside the opening slot 3;

[0024] Specifically, driven by the servo motor 4, the bidirectional screw rod 5 starts to rotate, and this rotation causes the movable block 6 on the bidirectional screw rod 5 to move toward the middle. At the same time, the first rotating shaft 7 on the movable block 6 will also start to rotate, and the second rotating shaft 10 is connected to the first rotating shaft 7 through the connecting rod 11, so it will also rotate. This rotation mechanism enables the placement plate 8 to be lifted and lowered. The movable rod 16 at the bottom of the placement plate 8 will move upward with the fourth hollow rod 15, and the fourth hollow rod 15 will move upward with the third hollow rod 14. This multi-stage support structure ensures the stability of the placement plate 8 during the lifting process. It is worth noting that the internal structure of the first hollow rod 12 is similar to that of a fishing rod. This design not only increases the strength of the support, but also ensures that the movable rods 16 around it always provide stable support for the placement plate 8.

[0025] Reference Figure 1 , Figure 2 and Figure 4The protective mechanism 2 includes a hollow frame 201, which is fixedly connected to the top of the placement plate 8 at equal intervals. A protective net 202 is slidably connected inside the hollow frame 201. Fixed rods 203 are fixedly connected to multiple corners of the top of the placement plate 8. A threaded rod 204 is rotatably connected to the front end of the top left of the placement plate 8. A plurality of hollow columns 205 are arranged on the top of the placement plate 8. The tops of the fixed rods 203 are fixedly connected to the inner tops of the corresponding hollow columns 205, and the tops of the threaded rods 204 are rotatably connected to the inner tops of the corresponding hollow columns 205. The threaded rods 204 and the fixed rods 203 are connected to the inner tops of the corresponding hollow columns 205. 3 are provided with sliders 207, the outer walls of the plurality of hollow columns 205 are provided with a plurality of slide grooves 206, the sliders 207 are respectively slidably connected with the corresponding inner sides of the slide grooves 206, the two sides of the protective net 202 are respectively fixedly connected with one end of the corresponding sliders 207, the front wall of the left front end hollow column 205 is fixedly connected with a servo motor 208, the output end of the servo motor 208 penetrates the corresponding hollow column 205 and is fixedly connected with a driving bevel gear 209, the middle and lower part of the outer side of the threaded rod 204 is fixedly connected with a driven bevel gear 210, and the driven bevel gear 210 is meshed and connected with the driving bevel gear 209;

[0026] Specifically, when the staff stands on the placement plate 8 to work, the servo motor 208 starts to work. Driven by the servo motor 208, the active bevel gear 209 starts to rotate. Due to the meshing of the active bevel gear 209 and the driven bevel gear 210, the driven bevel gear 210 will also rotate. This rotation causes the threaded rod 204 to start rotating. As the threaded rod 204 rotates, the slider 207 thereon moves upward in the slide groove 206, so that the slider 207 on the fixed rod 203 can move upward accordingly. This linkage effect causes the protective net 202 in the hollow frame 201 to start moving upward. The overall height of the protective net 202 can be adjusted to expand its protection range. This adjustment method reduces the possibility of accidental falls by staff and improves the practicality of the mechanism.

[0027] Reference Figure 2 A switch 17 is fixedly connected to the rear side of the front hollow frame 201, and the switch 17 is electrically connected to the servo motor 208 and the servo motor 4 respectively. A protective cover 18 is arranged on the outer side of the switch 17, and the top of the protective cover 18 is rotatably connected to the rear side of the corresponding hollow frame 201 through a movable shaft;

[0028] Specifically, the operation of the servo motor 208 and the servo motor 4 can be controlled by the switch 17, and the protective cover 18 can protect the switch 17 from being damaged by external factors.

[0029] Reference Figure 1 , a warning sign 19 is fixedly connected to one side of each of the plurality of hollow frames 201;

[0030] Specifically, the warning sign 19 can serve as a warning to pedestrians.

[0031] Working principle: When the lifting mechanism is used, the bidirectional screw rod 5 can be driven to rotate through the servo motor 4, and the movable block 6 on the bidirectional screw rod 5 will move toward the middle accordingly. At this time, the first rotating shaft 7 on the movable block 6 will rotate accordingly, and the second rotating shaft 10 will also rotate through the connecting rod 11, thereby driving the placement plate 8 to be lifted and lowered, and the movable rod 16 at the bottom of the placement plate 8 will move upward inside the fourth hollow rod 15, and the fourth hollow rod 15 will move upward inside the third hollow rod 14. The structure inside the first hollow rod 12 is similar to that of a fishing rod, thereby ensuring that the movable rods 16 on all sides can always support the placement plate 8. Cooperating with the work of the bidirectional screw rod 5 can increase the overall stability of the placement plate 8, thereby improving the work of the staff. The utility model has the advantages of safety and can meet the needs of users, and when the staff stands on the placement plate 8 to work, the active bevel gear 209 can be driven to rotate by the servo motor 208, and the driven bevel gear 210 on the threaded rod 204 will also rotate due to the engagement with the active bevel gear 209, so that the threaded rod 204 can be rotated, and the slider 207 on the threaded rod 204 will move upward in the slide groove 206, so as to drive the slider 207 of the fixed rod 203 to move upward, and then the protective net 202 in the hollow frame 201 can be moved upward, and the overall height of the protective net 202 can be adjusted according to the needs of the user, so as to expand its protection range, reduce the possibility of accidental falling of the staff, and improve the practicality of the mechanism.

Claims

1. A crane working platform lifting mechanism, comprising a base (1) and a connecting rod (11), characterized in that: An open slot (3) is provided in the middle of the top of the base (1); a servo motor (4) is fixedly connected to the right side of the base (1); the output end of the servo motor (4) passes through the open slot (3) and is fixedly connected to a bidirectional screw rod (5); the left and right sides of the outer wall of the bidirectional screw rod (5) are both threadedly connected to movable blocks (6); the top of the movable block (6) is rotatably connected to a first rotating shaft (7); a placement plate (8) is provided above the base (1); the left and right sides of the middle of the bottom end of the placement plate (8) are both fixedly connected to a U-shaped plate (9); the inside of the U-shaped plate (9) is rotatably connected to a second rotating shaft (10); the two second rotating shafts (10) are respectively connected to the connecting rod (11) is connected to the corresponding first rotating shaft (7); the four corners of the upper surface of the base (1) are fixedly connected with a vertically arranged first hollow rod (12), the first hollow rod (12) is internally slidably connected with a second hollow rod (13), the second hollow rod (13) is internally slidably connected with a third hollow rod (14), the third hollow rod (14) is internally slidably connected with a fourth hollow rod (15), the fourth hollow rod (15) is internally slidably connected with a movable rod (16), the top ends of the four movable rods (16) are respectively fixedly connected to the four corners of the bottom of the placement plate (8); the top of the placement plate (8) is provided with a protective mechanism (2).

2. A crane working platform lifting mechanism according to claim 1, characterized in that: The protective mechanism (2) comprises a hollow frame (201), wherein the hollow frame (201) is fixedly connected to the top of the placement plate (8) at equal intervals, and a protective net (202) is slidably connected inside the hollow frame (201). A plurality of corners on the top of the placement plate (8) are fixedly connected to fixed rods (203). The front end of the top left side of the placement plate (8) is rotatably connected to a threaded rod (204). A plurality of hollow columns (205) are arranged on the top of the placement plate (8), and the top ends of the fixed rods (203) are fixedly connected to the inner tops of the corresponding hollow columns (205). The top ends of the threaded rods (204) are rotatably connected to the inner tops of the corresponding hollow columns (205). The threaded rods (204) and the fixed rods are rotatably connected to the inner tops of the corresponding hollow columns (205). The outer sides of the hollow columns (203) are provided with sliders (207), the outer walls of the plurality of hollow columns (205) are provided with a plurality of slide grooves (206), the sliders (207) are respectively slidably connected to the inside of the corresponding slide grooves (206), the two sides of the protective net (202) are respectively fixedly connected to one end of the corresponding sliders (207), the front wall of the hollow column (205) at the left front end is fixedly connected to a servo motor (208), the output end of the servo motor (208) passes through the corresponding hollow column (205) and is fixedly connected to a driving bevel gear (209), the middle and lower part of the outer side of the threaded rod (204) is fixedly connected to a driven bevel gear (210), and the driven bevel gear (210) is meshedly connected to the driving bevel gear (209).

3. A crane working platform lifting mechanism according to claim 2, characterized in that: A switch (17) is fixedly connected to the rear side of the hollow frame (201) on the front side, and the switch (17) is electrically connected to the servo motor (208) and the servo motor (4) respectively.

4. A crane working platform lifting mechanism according to claim 3, characterized in that: A protective cover (18) is provided on the outside of the switch (17), and the top of the protective cover (18) is rotatably connected to the rear side of the corresponding hollow frame (201) via a movable shaft.

5. The crane working platform lifting mechanism according to claim 1, characterized in that: The two movable blocks (6) are both slidably connected inside the opening groove (3).

6. A crane working platform lifting mechanism according to claim 2, characterized in that: A warning sign (19) is fixedly connected to one side of each of the plurality of hollow frames (201).

7. The crane working platform lifting mechanism according to claim 2, characterized in that: The sizes of the plurality of protective nets (202) respectively match the internal sizes of the corresponding hollow frames (201).

8. The crane working platform lifting mechanism according to claim 1, characterized in that: The left end of the bidirectional screw rod (5) is rotatably connected to the inner left side of the opening slot (3).

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