Tower crane luffing trolley starting and stopping device

Abstract

The utility model discloses a tower crane variable-amplitude trolley starting and stopping device which comprises a tower crane variable-amplitude trolley, supporting plates are installed at the two ends of the top of the tower crane variable-amplitude trolley, starting and stopping mechanisms are symmetrically installed at the two ends of the bottom of the inner side face of each supporting plate, and fixing plates and L-shaped plates are installed on the starting and stopping mechanisms. The brake caliper is started to drive the brake pad I to move, and when the brake pad I cannot move, the piston thrust direction of the brake caliper pushes the L-shaped plate to move towards the brake pad I, so that the two side surfaces of the suspension arm can be quickly clamped and braked under the matching of the brake pad I and the brake pad II; the situation that the tower crane variable-amplitude trolley cannot stop in time due to inertia when the traction motor stops is avoided, and meanwhile, under clamping of the first brake pad and the second brake pad after the tower crane variable-amplitude trolley is braked, the problem that the tower crane variable-amplitude trolley slightly moves left and right under the action that the traction motor pulls a steel wire rope can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of tower crane luffing trolley technology, specifically a tower crane luffing trolley starting and stopping device. Background Technology

[0002] The tower crane luffing trolley is an important component of a tower crane. It is typically installed on the horizontal jib rail of the tower crane. The trolley's movement enables the tower crane to adjust its boom radius, thus changing the range of motion of the hook. The luffing trolley consists of multiple components, including the frame structure, wire ropes, pulleys, traveling wheels, guide wheels, wire rope support wheels, wire rope anti-derailment rollers, trolley traction rope tensioner, and rope breakage safety device. These components work together to ensure the stable operation and safety of the trolley. As the trolley travels on the jib rail, it can adjust the range of motion of the hook, allowing the tower crane to work in different directions and at different heights. Transportation function: The tower crane luffing trolley can also be used as a transport device to move smaller items, which is very practical on construction sites.

[0003] Currently, when the tower crane luffing trolley moves on the boom, it needs to be driven by a traction motor pulling steel wire ropes in different directions to move the tower crane luffing trolley back and forth. When the traction motor stops, the tower crane luffing trolley stops. However, due to the heavy weight of the tower crane luffing trolley and the load being lifted, and the inertia that the traction motor will have when it stops, there will be a buffer period when the tower crane luffing trolley stops, and it cannot stop immediately. At the same time, when the tower crane luffing trolley is stationary, it will also have slight left and right movements because the traction motor pulls the steel wire ropes.

[0004] Therefore, a tower crane luffing trolley start and stop device is proposed to solve the above problems. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a tower crane luffing trolley start and stop device. This device aims to solve the problem that in existing technologies, when the traction motor stops, the tower crane luffing trolley stops, but due to the heavy weight of the trolley and the load being lifted, and the inherent inertia when the traction stops, there is a buffer period before the trolley comes to a complete stop, preventing it from stopping promptly. Furthermore, when the trolley is stationary, it is pulled by the traction motor pulling the wire rope, resulting in slight left-right movement.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A tower crane luffing trolley starting and stopping device includes a tower crane luffing trolley. Support plates are installed at both ends of the top of the tower crane luffing trolley. Starting and stopping mechanisms are symmetrically installed at both ends of the bottom inner side of the support plates. A fixed plate and an L-shaped plate are installed on the starting and stopping mechanisms. Brake pad one and brake pad two are respectively installed on the fixed plate and the L-shaped plate. A brake caliper is installed on the fixed plate. When the brake caliper is activated, it can drive brake pad one to move. When the hydraulic oil in the brake caliper flows back, it can drive the L-shaped plate to slide in the direction of brake pad one.

[0010] As a preferred embodiment of this utility model, the upper two ends of the inner side of the support plate are rotatably mounted with sliding rollers, and an oil pump is installed at the bottom of the inner side of the support plate. Both ends of the oil pump are connected to oil pipes for inputting hydraulic oil to the brake caliper. The oil pump is turned off when the traction motor starts and automatically inputs hydraulic oil to the brake caliper when the traction motor stops.

[0011] As a preferred embodiment of this utility model, a mounting cover is installed between the two sides of the fixing plate, the brake caliper is installed inside the mounting cover, one end of the brake caliper is located opposite the inner side of the L-shaped plate, and one side of the brake pad is installed at one end of the brake caliper.

[0012] As a preferred embodiment of this utility model, four connecting columns are installed on the outer side of the fixing plate, and an mounting plate is fixedly installed at one end of each connecting column. Mounting holes are provided at the four corners of the mounting plate, and the mounting plate is threadedly connected to the inner side of the support plate by bolts passing through the mounting holes.

[0013] As a preferred embodiment of this utility model, the bottom of the fixing plate is provided with a groove, and sliders are symmetrically installed at both ends of the inner side of the groove. The bottom two sides of the L-shaped plate are symmetrically provided with sliding grooves, and one end of the L-shaped plate is inserted into the inner side of the groove and the slider is slidably installed on the inner side of the sliding groove.

[0014] As a preferred embodiment of this utility model, the second brake pad is fixedly installed on the inner side of the L-shaped plate, the positions of the second brake pad and the first brake pad are mirror images of each other, and the distance between the outer sides of the second brake pad and the first brake pad is greater than the width of the boom.

[0015] As a preferred embodiment of this utility model, a connecting plate is installed on the top of one end of the L-shaped plate, and three dampers are installed at equal intervals on the outer side of the mounting cover. One end of the damper is fixedly connected to one side of the connecting plate, and a spring is sleeved between the outer ring surface of one end of the damper and the side of the connecting plate. The inner side of the connecting plate is in contact with one end of the brake caliper.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention utilizes a brake caliper to move brake pad one, which then compresses the outer side of the boom. When brake pad one cannot move, the piston thrust of the brake caliper pushes the L-shaped plate towards brake pad one. Simultaneously, brake pad two compresses the other side of the boom. Therefore, with the cooperation of brake pad one and brake pad two, both sides of the boom can be quickly clamped and braked, allowing the tower crane luffing trolley to stop quickly during movement. This avoids the inertia when the traction motor stops, which would cause the tower crane luffing trolley to have a buffer period before stopping and not stop in time. Furthermore, after the tower crane luffing trolley stops, the clamping effect of brake pad one and brake pad two effectively solves the problem of slight left and right movement of the tower crane luffing trolley under the action of the traction motor pulling the wire rope. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a tower crane luffing trolley starting and stopping device according to the present invention;

[0020] Figure 2 This is an enlarged structural diagram of the support plate of the tower crane luffing trolley starting and stopping device according to the present invention;

[0021] Figure 3 This is a schematic diagram showing the unfolded and enlarged structure of the starting and stopping mechanism of a tower crane luffing trolley starting and stopping device according to this utility model;

[0022] Figure 4 This is an enlarged structural schematic diagram of the fixing plate of the tower crane luffing trolley starting and stopping device according to the present invention.

[0023] In the diagram: 1. Tower crane luffing trolley; 11. Support plate; 12. Sliding roller; 13. Oil pump; 14. Oil pipe; 2. Starting and stopping mechanism; 21. Fixing plate; 211. Mounting cover; 212. Brake caliper; 213. Groove; 214. Sliding block; 215. Brake pad one; 216. Damper; 217. Spring; 22. L-shaped plate; 221. Brake pad two; 222. Slide groove; 223. Connecting plate; 23. Mounting plate; 231. Mounting hole; 232. Connecting column. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1-4 This embodiment provides a tower crane luffing trolley starting and stopping device, including a tower crane luffing trolley 1. Support plates 11 are installed at both ends of the top of the tower crane luffing trolley 1. Starting and stopping mechanisms 2 are symmetrically installed at both ends of the bottom inner side of the support plates 11. A fixed plate 21 and an L-shaped plate 22 are installed on the starting and stopping mechanisms 2. Brake pad 1 215 and brake pad 221 are respectively installed on the fixed plate 21 and the L-shaped plate 22. A brake caliper 212 is installed on the fixed plate 21. When the brake caliper 212 is activated, it can move brake pad 1 215. When the hydraulic oil in the brake caliper 212 flows back, it can drive the L-shaped plate 22 to slide towards brake pad 1 215. In use, the tower crane luffing trolley starting and stopping device moves brake pad 1 215 by activating the brake caliper 212, thus controlling the boom movement. The outer side of the boom is squeezed. When brake pad 215 cannot move, the piston thrust of brake caliper 212 pushes L-shaped plate 22 towards brake pad 215. At the same time, brake pad 221 squeezes the other side of the boom. Therefore, with the cooperation of brake pad 215 and brake pad 221, the two sides of the boom can be clamped and braked quickly, so that the tower crane luffing trolley can stop quickly during the movement. This avoids the inertia when the traction motor stops, which would cause the tower crane luffing trolley to have a buffer distance when stopping and not be able to stop in time. At the same time, after the tower crane luffing trolley stops, under the clamping of brake pad 215 and brake pad 221, the problem of slight left and right movement of the tower crane luffing trolley under the action of the traction motor pulling the wire rope can be effectively solved.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a mounting cover 211 is installed between the two sides of the fixing plate 21. The brake caliper 212 is installed inside the mounting cover 211. One end of the brake caliper 212 is located opposite the inner side of the L-shaped plate 22. One side of the brake pad 215 is installed at one end of the brake caliper 212. Therefore, when the oil pump 13 supplies oil to the brake caliper 212, it can cause the piston inside the brake caliper 212 to push the brake pad 215 to squeeze the outer side of the boom.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, four connecting posts 232 are installed on the outer side of the fixing plate 21. An mounting plate 23 is fixedly installed at one end of the connecting post 232. Mounting holes 231 are opened at the four corners of the mounting plate 23. The mounting plate 23 is fastened to the inner side of the support plate 11 by bolts passing through the mounting holes 231, thereby fixing the fixing plate 21 on the support plate 11.

[0029] In this embodiment, as Figure 3 and Figure 4 As shown, the bottom of the fixed plate 21 has a groove 213, and the inner sides of the groove 213 are symmetrically mounted with sliders 214. The bottom sides of the L-shaped plate 22 are symmetrically provided with sliding grooves 222. One end of the L-shaped plate 22 is inserted into the inner side of the groove 213 and the sliders 214 are slidably mounted on the inner side of the sliding grooves 222. Therefore, the L-shaped plate 22 can slide stably at the bottom of the fixed plate 21.

[0030] In this embodiment, as Figure 3 As shown, brake pad 221 is fixedly installed on the inner side of L-shaped plate 22. Brake pad 221 and brake pad 215 are installed in mirror image. The distance between the outer sides of brake pad 221 and brake pad 215 is greater than the width of the boom. Therefore, when the tower crane luffing trolley slides on the boom via the sliding roller 12, brake pad 215 and brake pad 221 will not generate friction on the boom.

[0031] In this embodiment, as Figure 3 and Figure 4 As shown, a connecting plate 223 is installed on the top of one end of the L-shaped plate 22. Three dampers 216 are installed at equal intervals on the outer side of the mounting cover 211. One end of the damper 216 is fixedly connected to one side of the connecting plate 223. A spring 217 is sleeved between the outer ring surface of one end of the damper 216 and the side of the connecting plate 223. The inner side of the connecting plate 223 is in contact with one end of the brake caliper 212. Therefore, when the piston of the brake caliper 212 pushes the brake pad 215, when the brake pad 215 cannot move, the piston thrust of the brake caliper 212 can drive the fixed plate 21 to move backward as a whole. This pushes the connecting plate 223 to drive the brake pad 221 to move in the direction of the brake pad 215, thereby achieving the opposite movement of the brake pad 215 and the brake pad 221 to clamp the outer side of the boom.

[0032] Working Principle: When using this tower crane luffing trolley starting and stopping device, the tower crane luffing trolley is first installed on the tower crane's boom. When the traction motor pulls the wire rope, the tower crane luffing trolley moves along the boom via the sliding roller 12. Brake pads 215 and 221 are located between the two sides of the boom. When the traction motor stops, the oil pump 13 supplies oil to the brake caliper 212. The brake caliper 212 activates, causing brake pad 215 to move and press against the outer side of the boom. When brake pad 215 cannot move, the piston thrust of the brake caliper 212 pushes the L-shaped plate 22 towards the brake pad 215. As the crane moves, brake pad 221 simultaneously presses against the other side of the boom. Therefore, with the cooperation of brake pad 215 and brake pad 221, the two sides of the boom can be quickly clamped and braked, allowing the tower crane luffing trolley to stop quickly during movement. This avoids the inertia when the traction motor stops, which would cause the tower crane luffing trolley to have a buffer distance before stopping and not stop in time. At the same time, after the tower crane luffing trolley stops, the clamping of brake pad 215 and brake pad 221 can effectively solve the problem of slight left and right movement of the tower crane luffing trolley under the action of the traction motor pulling the wire rope.

[0033] All technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A tower crane luffing trolley starting and stopping device, comprising a tower crane luffing trolley (1), characterized in that: The tower crane luffing trolley (1) has support plates (11) installed at both ends of the top. The support plates (11) have starting and stopping mechanisms (2) symmetrically installed at both ends of the bottom of the inner side. The starting and stopping mechanisms (2) have a fixed plate (21) and an L-shaped plate (22) installed on them. The fixed plate (21) and the L-shaped plate (22) have brake pad one (215) and brake pad two (221) installed on them respectively. The fixed plate (21) has a brake caliper (212) installed on it. When the brake caliper (212) is started, it can drive the brake pad one (215) to move. When the hydraulic oil in the brake caliper (212) flows back, it can drive the L-shaped plate (22) to slide towards the brake pad one (215).

2. The tower crane luffing trolley starting and stopping device according to claim 1, characterized in that: The support plate (11) has a sliding roller (12) rotatably mounted on both ends of the inner side top. The support plate (11) has an oil pump (13) mounted at the bottom of the inner side. Both ends of the oil pump (13) are connected to oil pipes (14) for inputting hydraulic oil to the brake caliper (212). The oil pump (13) is turned off when the traction motor starts and automatically inputs hydraulic oil to the brake caliper (212) when the traction motor stops.

3. The tower crane luffing trolley starting and stopping device according to claim 1, characterized in that: A mounting cover (211) is installed between the two sides of the fixing plate (21). The brake caliper (212) is installed inside the mounting cover (211). One end of the brake caliper (212) is located opposite the inner side of the L-shaped plate (22). One side of the brake pad (215) is installed at one end of the brake caliper (212).

4. The tower crane luffing trolley starting and stopping device according to claim 1, characterized in that: Four connecting posts (232) are installed on the outer side of the fixing plate (21). An mounting plate (23) is fixedly installed at one end of the connecting post (232). Mounting holes (231) are opened at the four corners of the mounting plate (23). The mounting plate (23) is threadedly connected to the inner side of the support plate (11) by bolts passing through the mounting holes (231).

5. The tower crane luffing trolley starting and stopping device according to claim 1, characterized in that: The bottom of the fixed plate (21) is provided with a groove (213), and sliders (214) are symmetrically installed on both ends of the inner side of the groove (213). The bottom two sides of the L-shaped plate (22) are symmetrically provided with sliding grooves (222). One end of the L-shaped plate (22) is inserted into the inner side of the groove (213) and the sliders (214) are slidably installed on the inner side of the sliding grooves (222).

6. The tower crane luffing trolley starting and stopping device according to claim 3, characterized in that: The second brake pad (221) is fixedly installed on the inner side of the L-shaped plate (22). The positions of the second brake pad (221) and the first brake pad (215) are mirror images of each other. The distance between the outer sides of the second brake pad (221) and the first brake pad (215) is greater than the width of the boom.

7. The tower crane luffing trolley starting and stopping device according to claim 3, characterized in that: A connecting plate (223) is installed on the top of one end of the L-shaped plate (22). Three dampers (216) are installed at equal intervals on the outer side of the mounting cover (211). One end of the damper (216) is fixedly connected to one side of the connecting plate (223). A spring (217) is sleeved between the outer ring surface of one end of the damper (216) and the side of the connecting plate (223). The inner side of the connecting plate (223) is in contact with one end of the brake caliper (212).

Images