Cold bed unloading trolley device and conveying device

Abstract

This invention provides a cooling bed unloading trolley device and a conveying device, relating to the field of steel cooling bed conveying. It aims to improve the low efficiency and safety issues associated with handling malfunctions during the movement of the unloading trolley carrying steel. The cooling bed unloading trolley device includes a trolley body, a bracket, a swing frame, and a drive chain; the bracket is positioned above the trolley body; the swing frame supports the vertical movement of the bracket during rotation relative to the trolley body; the drive chain is connected to the swing frame, and is used to pull the swing frame to rotate and stop at a preset position, so that the swing frame supports the bracket to move upward to a preset height; or, in the event of a malfunction, the drive chain is used to move the bracket downward. The conveying device includes the above-described device. If the drive chain of the unloading trolley breaks, the bracket will automatically descend under gravity to a height lower than the bracket height under normal operating conditions, avoiding contact with the steel, thus achieving efficient and safe handling of the malfunction.

Description

Technical Field

[0001] This invention relates to the field of steel cooling bed conveying, and more specifically, to a cooling bed unloading trolley device and a conveying device. Background Technology

[0002] Currently, most bar mills use walking beam cooling beds, where a discharge device lifts the steel from the cooling bed onto the output roller conveyor. The discharge device consists of dozens of steel chain conveyors and dozens of discharge trolleys. Every four discharge trolleys, along with a lifting frame and drive chain, form a conveyor system. The entire operation of the discharge device includes: the conveyor waits at a low position until the steel chain conveyors have collected a certain amount of steel; then, the conveyor rises to a high position, and the discharge trolleys lift the collected steel; then, the drive chain pulls the discharge trolleys, transporting the steel above the cooling bed output roller conveyor; subsequently, the conveyor descends to a low position, and the discharge trolleys place the steel onto the cooling bed output roller conveyor; finally, the discharge trolleys are pulled back below the steel chain conveyors by the drive chain, waiting for the steel chain to collect the steel, and the above process is repeated.

[0003] When the unloading trolley moves carrying steel, the load is heavy, and the drive chain bears a large tension. After years of operation, the drive chain may break or the chain connecting pin may come loose, causing the unloading trolley to stop moving. Since all the unloading trolleys rise and fall together with the conveyor system, it is impossible to raise or lower any one trolley independently. When an unloading trolley is carrying steel, the other trolleys can move normally, but the trolley with the faulty drive chain stops, its position inconsistent with the other operating trolleys. This causes the steel to be pulled by the faulty trolley, preventing it from being conveyed to the cooling bed output roller conveyor.

[0004] There are two ways to handle this malfunction: one is to move the faulty unloading trolley, aligning its position with other unloading trolleys, and then repair the broken chain. This method is time-consuming and is generally implemented during maintenance. The other method is to remove the faulty unloading trolley from the conveyor system, thus preventing the steel from being pulled by it. This method is faster, usually taking about ten minutes. However, the second method still has some drawbacks. During the troubleshooting process, the steel placed on the steel chain and near the unloading trolley is still 200-300°C, and the surrounding ambient temperature is high, affecting the efficiency of personnel handling the malfunction; the high steel temperature also poses a risk of burns; although the troubleshooting is faster, it still causes downtime, affecting production. Summary of the Invention

[0005] The present invention includes, for example, providing a cooling bed unloading trolley device that can improve the problems of low fault handling efficiency and safety during the steel-carrying process of the unloading trolley.

[0006] The present invention also aims to provide a conveying device that can improve the problems of low efficiency and unsafety in handling faults during the steel unloading process of the unloading trolley.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] An embodiment of the present invention provides a cooling bed unloading trolley device, including a trolley body, a bracket, a swing frame, and a transmission chain; the bracket is disposed above the trolley body and is used to support steel; the swing frame is rotatably disposed on the trolley body and is used to support the bracket during rotation relative to the trolley body, and to drive the bracket to move upward or downward; the transmission chain is connected to the swing frame and is used to pull the swing frame to rotate and stop at a preset position, and to pull the trolley body forward, so that the swing frame supports the bracket to move upward to a preset height; or, in the event of a fault disconnection, the transmission chain is used to allow the swing frame to rotate under gravity, so that the bracket moves downward.

[0009] In addition, the cooling bed unloading trolley device provided in the embodiments of the present invention may also have the following additional technical features:

[0010] Optionally, the swing frame includes a rotating pin and a swing rod; the rotating pin is rotatably mounted on the trolley body, the middle part of the swing rod is rotatably connected to the rotating pin, the swing rod is connected to the transmission chain, one end of the swing rod is used to drive the swing rod to rotate under the pull of the transmission chain, and the other end of the swing rod is used to support the bracket at all times during the rotation of the swing rod relative to the trolley body.

[0011] Optionally, the swing arm includes a first rod and a second rod that are fixed to each other and set at an angle. The intersection of the first rod and the second rod is connected to the rotating pin. The first rod is used to support the bracket at all times during the rotation of the swing arm relative to the trolley body. The second rod is used to drive the first rod to rotate under the pull of the transmission chain.

[0012] Optionally, the cooling bed unloading trolley device further includes a traction block; the traction block is slidably disposed on the bottom side of the trolley body in a horizontal direction; the end of the second rod away from the first rod is hinged to the traction block; the transmission chain is connected to the traction block, and the traction block is used to move in the horizontal direction under the pull of the transmission chain, and drive the first rod and the second rod to rotate.

[0013] Optionally, there are two swing arms, which are respectively disposed on both sides of the trolley body and connected to both ends of the rotating pin. The two swing arms are used to rotate synchronously under the pull of the transmission chain and to support the bracket synchronously.

[0014] Optionally, the swing frame further includes a support pin, which is rotatably mounted on the two swing arms and rotatably connected to the bracket; the support pin is used to drive the bracket to move upward or downward during the rotation of the swing arms relative to the trolley body.

[0015] Optionally, there are two swing frames, which are respectively located at the front end and rear end of the trolley body, and the two swing frames together support the bracket.

[0016] Optionally, the cooling bed unloading trolley device further includes a pull chain, which is connected to the swing frame disposed at the rear end of the trolley body and connected to the transmission chain. The pull chain is used to synchronously pull the swing frame to rotate and stop at a preset position with the transmission chain, and the pull chain is used to synchronously pull the trolley body forward or backward with the transmission chain.

[0017] Optionally, the front and rear ends of the bracket are respectively provided with limiting platforms, and a space for supporting steel is formed between the two limiting platforms.

[0018] An embodiment of the present invention also provides a conveying device. The conveying device includes a conveying track and multiple cooling bed unloading trolleys; the multiple cooling bed unloading trolleys are arranged side by side at intervals on the conveying track, and the multiple cooling bed unloading trolleys are used to jointly support steel.

[0019] The beneficial effects of the cooling bed unloading trolley device and conveying device according to embodiments of the present invention include, for example:

[0020] The cooling bed unloading trolley device includes a trolley body, a bracket, a swing frame, and a transmission chain. The bracket is positioned above the trolley body and is used to support steel. The swing frame is rotatably mounted on the trolley body and is used to support the bracket during rotation relative to the trolley body, and to move the bracket upwards or downwards. The transmission chain is connected to the swing frame and is used to pull the swing frame to rotate and stop at a preset position, and to pull the trolley body forward so that the swing frame supports the bracket to move upwards to a preset height. Alternatively, in the event of a fault disconnection, the transmission chain is used to allow the swing frame to rotate under gravity, so that the bracket moves downwards.

[0021] During production, if the drive chain of the unloading trolley breaks, the support bracket will automatically lower under gravity to a height lower than other normally functioning brackets. This prevents contact with the steel and ensures that the steel is not obstructed from being conveyed to the cooling bed output roller conveyor. There's no need to immediately address the fault; it can be dealt with after the steel conveying process is complete. There's also no concern about the steel burning maintenance personnel. This ensures both efficient and safe steel conveying without disrupting the process.

[0022] The conveying device includes the aforementioned cooling bed unloading trolley device, which can improve the problem of low efficiency and safety in handling malfunctions during the movement of the unloading trolley carrying steel. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram showing the bracket at a preset height in the cooling bed unloading trolley device provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram showing the state in which the bracket moves downward and separates from the steel when the transmission chain of the cooling bed unloading trolley device provided in the embodiment of the present invention fails and disconnects.

[0026] Icons: 10-Cooling bed unloading trolley device; 100-Trolley body; 110-Bracket; 111-Limiting platform; 120-Swing frame; 200-Rotating pin; 210-Swing rod; 211-First rod; 212-Second rod; 220-Traction block; 230-Transmission chain; 240-Support pin; 250-Hinge shaft; 300-Pull chain; 310-Pull block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, 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, and therefore should not be construed as a limitation of this invention.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0033] The following is combined Figures 1 to 2 The cooling bed unloading trolley device 10 provided in this embodiment will be described in detail.

[0034] Please refer to Figure 1 as well as Figure 2 An embodiment of the present invention provides a cooling bed unloading trolley device 10, including a trolley body 100, a bracket 110, a swing frame 120, and a transmission chain 230. The bracket 110 is disposed above the trolley body 100 and is used to support steel. The swing frame 120 is rotatably disposed on the trolley body 100 and is used to support the bracket 110 during rotation relative to the trolley body 100, and to drive the bracket 110 to move upward or downward. The transmission chain 230 is connected to the swing frame 120 and is used to pull the swing frame 120 to rotate and stop at a preset position, and to pull the trolley body 100 forward so that the swing frame 120 supports the bracket 110 to move upward to a preset height; or, in the event of a fault disconnection, the transmission chain 230 is used to make the swing frame 120 rotate under gravity so that the bracket 110 moves downward.

[0035] The trolley body 100 is horizontally arranged, and the bracket 110 is movably arranged on the trolley body 100. The bracket 110 moves up and down during the rotation of the swing frame 120 relative to the trolley body 100. The bracket 110 has two states. The first state is referred to... Figure 1 The bracket 110 moves upward, lifting the steel to a preset height; second state, refer to Figure 2 If bracket 110 moves downwards, it will move away from the preset height.

[0036] The swing frame 120 can rotate and stay at a preset position under the pull of the transmission chain 230, at which time the bracket 110 is at a preset height; when there is no pull of the transmission chain 230, the swing frame 120 rotates under the action of gravity, at which time the bracket 110 moves downward and away from the preset height.

[0037] While the drive chain 230 pulls the swing frame 120 to rotate, it can also pull the trolley body 100 to move. During the movement of the trolley body 100, the drive chain 230 keeps the swing frame 120 in a preset position so that the bracket 110 is always at a preset height. That is, during the movement of the trolley body 100, that is, during the process of supporting the steel, the bracket 110 is always at the preset height, and together with the brackets 110 on multiple trolley bodies 100 of the same batch, it supports and moves the steel. When the drive chain 230 fails and breaks, the swing frame 120 loses the pulling effect of the drive chain 230. The swing frame 120 rotates under the action of gravity, causing the bracket 110 to move downward. The swing frame 120 disengages from the preset height of the steel in the same batch, and the bracket 110 corresponding to the trolley body 100 disengages from the steel, without affecting the movement of the steel in the same batch.

[0038] As mentioned above, when the transmission chain 230 fails, the bracket 110 corresponding to the trolley body 100 detaches from the steel at the preset height. The steel can still be transported forward under the support of the brackets 110 on other trolley bodies 100. The failed bracket 110 will not affect the forward transport of the steel. The fault handling efficiency is high, and there is no need to manually handle the steel. There is no need to worry about the steel burning personnel. The safety is high. After the steel is transported, the transmission chain 230 can be inspected and repaired.

[0039] Reference Figure 1 as well as Figure 2In this embodiment, the swing frame 120 includes a rotating pin 200 and a swing rod 210. The rotating pin 200 is rotatably mounted on the trolley body 100, and the middle part of the swing rod 210 is rotatably connected to the rotating pin 200. The swing rod 210 is connected to the transmission chain 230. One end of the swing rod 210 is used to drive the swing rod 210 to rotate under the pull of the transmission chain 230, and the other end of the swing rod 210 is used to support the bracket 110 at all times during the rotation of the swing rod 210 relative to the trolley body 100.

[0040] The transmission chain 230 pulls the rocker arm 210 to rotate around the pivot pin 200, and the two ends of the rocker arm 210 rotate relative to the center of rotation of the rocker arm 210. One end of the rocker arm 210 rotates under the pull of the transmission chain 230, which can drive the other end of the rocker arm 210 to rotate. During the rotation, the other end of the rocker arm 210 moves up and down in the height direction, which can drive the bracket 110 to move up and down.

[0041] Specifically, the rotating pin 200 passes through the trolley body 100 along the width direction of the trolley body 100, and the swing rod 210 is set in a vertical plane and rotates around the rotating pin 200 in the vertical plane.

[0042] Reference Figure 1 as well as Figure 2 In this embodiment, the swing arm 210 includes a first rod 211 and a second rod 212 that are fixed to each other and set at an angle. The intersection of the first rod 211 and the second rod 212 is connected to the rotating pin 200. The first rod 211 is used to support the bracket 110 during the rotation of the swing arm 210 relative to the trolley body 100. The second rod 212 is used to drive the first rod 211 to rotate under the pull of the transmission chain 230.

[0043] Specifically, in this embodiment, the first rod 211 and the second rod 212 are integrally formed to create a V-shaped swing arm 210. In this embodiment, the angle between the first rod 211 and the second rod 212 is approximately a right angle, which can be between 60° and 90°. It should be noted that "perpendicular" in this context does not require the angle to be exactly 90°; it can be slightly inclined, for example, within the range of 88° to 90°, and is still considered perpendicular. Example: The angle between the first rod 211 and the second rod 212 can also be 88°, 89°, etc.

[0044] Reference Figure 1 as well as Figure 2In this embodiment, the cooling bed unloading trolley device 10 further includes a traction block 220; the traction block 220 is slidably disposed on the bottom side of the trolley body 100 in the horizontal direction; the end of the second rod 212 away from the first rod 211 is hinged to the traction block 220; the transmission chain 230 is connected to the traction block 220, and the traction block 220 is used to move in the horizontal direction under the pull of the transmission chain 230, and drive the first rod 211 and the second rod 212 to rotate.

[0045] Specifically, the cooling bed unloading trolley device 10 also includes a hinge shaft 250, through which the second rod 212 and the traction block 220 are hinged.

[0046] Specifically, with Figure 1 The relative positions of the components are described below. A limit rail is provided on the bottom side of the trolley body 100, and the traction block 220 is slidably disposed within the limit rail. As the traction block 220 moves along the limit rail, it causes the second rod 212 to swing left and right, thereby causing the first rod 211 to swing up and down.

[0047] By setting the length of the limiting slide rail, the rotation range of the swing arm 210 can be limited. When the second rod 212 swings to the preset position, the traction block 220 can no longer move forward. At this time, the transmission chain 230 pulls the trolley body 100 to move by rotating the pin 200.

[0048] Reference Figure 1 as well as Figure 2 In this embodiment, there are two swing arms 210, which are respectively disposed on both sides of the trolley body 100 and connected to both ends of the rotating pin 200. The two swing arms 210 are used to rotate synchronously under the pull of the transmission chain 230 and to support the bracket 110 synchronously. The number of two swing arms 210 ensures that the swing frame 120 rotates in a balanced manner, so that the bracket 110 can move up and down in a balanced manner.

[0049] In this embodiment, there are two traction blocks 220, which are slidably disposed on both sides of the trolley body 100 in the horizontal direction. Two second rods 212 are hinged to the two traction blocks 220 respectively. In this embodiment, there are two transmission chains 230, which are connected to the two traction blocks 220 respectively. The two transmission chains 230 synchronously pull the two traction blocks 220 to move.

[0050] Reference Figure 1 as well as Figure 2In this embodiment, the swing frame 120 further includes a support pin 240, which is rotatably mounted on the two swing rods 210 and is rotatably connected to the bracket 110. The support pin 240 is used to drive the bracket 110 to move upward or downward during the rotation of the swing rods 210 relative to the trolley body 100.

[0051] The support pin 240 is used to connect the two first rods 211, and also to support the bracket 110. Furthermore, the support pin 240 is also connected to the bracket 110, thus fixing the relative position of the bracket 110 and the support pin 240. During the up-and-down movement of the support pin 240, the bracket 110 is moved up and down synchronously, preventing displacement of the bracket 110 during this movement and reducing frictional loss between the swing frame 120 and the bracket 110.

[0052] Reference Figure 1 as well as Figure 2 In this embodiment, there are two swing frames 120. The two swing frames 120 are respectively set at the front end and the rear end of the trolley body 100, and the two swing frames 120 together support the bracket 110.

[0053] by Figure 1 The relative positions of the two swing brackets 120 are described below. One swing bracket 120 is located at the left end of the trolley body 100, and the other swing bracket 120 is located at the right end of the trolley body 100. The two swing brackets 120 simultaneously support the front and rear ends of the bracket 110 to ensure force balance.

[0054] Reference Figure 1 as well as Figure 2 In this embodiment, the cooling bed unloading trolley device 10 further includes a pulling chain 300, which is connected to a swing frame 120 disposed at the rear end of the trolley body 100 and is connected to a transmission chain 230. The pulling chain 300 is used to pull the swing frame 120 to rotate and stop at a preset position synchronously with the transmission chain 230, and the pulling chain 300 is used to pull the trolley body 100 forward or backward synchronously with the transmission chain 230.

[0055] Specifically, the two swing frames 120 have the same structure and orientation. The pulling chain 300 and the transmission chain 230 work synchronously to pull the swing frame 120 counterclockwise, causing it to lift the bracket 110 to a preset height, and then pull the trolley body 100 forward or backward. During this movement, the bracket 110 remains at the preset height under the combined pull of the pulling chain 300 and the transmission chain 230. After the bracket 110 has moved the steel into position, the trolley body 100 moves downward, disengaging the bracket 110 from the steel at the preset height. Then, the pulling chain 300 and the transmission chain 230 pull the trolley body 100 backward, returning it to its initial position to receive the next batch of steel.

[0056] In other words, during the forward transport of steel, the trolley body 100 moves forward, and the bracket 110 is at a preset height, supporting the steel. After the steel is transported to the designated position, the trolley body 100 moves downward, causing the bracket 110 to detach from the steel, and then the trolley body 100 moves backward. If the drive chain 230 breaks during the forward transport of steel, the bracket 110 falls onto the trolley body 100 and no longer participates in the transport of the steel, thus not affecting the transport of the steel. The fault is handled efficiently and safely.

[0057] Specifically, the pulling chain 300 and the transmission chain 230 are the same chain, and the pulling chain 300 and the transmission chain 230 are the two ends of the chain that pass over the driving sprocket and the driven sprocket, respectively. After the chain is installed, the bracket 110 is in an upward supporting state at a preset height. When the trolley body 100 transports the steel to the top of the output roller conveyor, the lifting frame drives the trolley body 100 to descend as a whole, thereby separating the trolley body 100 from the steel.

[0058] It should be noted that the cooling bed unloading trolley device 10 also includes a pull block 310, which is horizontally positioned at the rear end of the trolley body 100. The pull chain 300 is connected to the pull block 310, and the second rod 212 of the swing frame 120 located at the rear end of the trolley body 100 is hinged to the pull block 310. The horizontal stroke of the pull block 310 limits the rotation range of the swing frame 120 located at the rear end of the trolley body 100, thereby controlling the vertical movement of the bracket 110.

[0059] In this embodiment, the front and rear ends of the bracket 110 are respectively provided with limiting platforms 111, and a space for supporting steel is formed between the two limiting platforms 111. The two limiting platforms 111 are used to limit the position of the steel on the bracket 110, thereby reducing the displacement of the steel during the transportation process.

[0060] According to the cooling bed unloading trolley device 10 provided in this embodiment, the working principle of the cooling bed unloading trolley device 10 includes: during installation, the transmission chain 230 pulls the traction block 220 to move outward, the traction block 220 drives the swing rod 210 to rotate upward around the rotating pin 200 through the hinge shaft 250, and the swing rod 210 drives the bracket 110 to move upward through the support pin 240. When the transmission chain 230 is tensioned, the bracket 110 rises to the preset height and reaches the normal working state.

[0061] During production, the drive chain 230 pulls the traction block 220 forward, the traction block 220 pulls the swing arm 210 forward via the hinge shaft 250, and the swing arm 210 pulls the trolley body 100 forward via the rotating pin 200. The trolley body 100 moves backward on the same principle. Whether pulling the trolley body 100 or at rest, the drive chain 230 maintains tension, and the bracket 110 is always in a high position under the action of tension.

[0062] When the transmission chain 230 breaks, the chain tension disappears, and the bracket 110 moves downward under the action of gravity, causing the swing arm 210 to rotate downward. The swing arm 210, through the traction block 220, drives the broken transmission chain 230 to retract. Finally, the bracket 110 descends to its lowest position under the action of gravity, thus avoiding contact with the steel.

[0063] The cooling bed unloading trolley device 10 provided in this embodiment has at least the following advantages:

[0064] By adopting the above technical solution, after the unloading trolley is equipped with the drive chain 230, the bracket 110 can be raised and in normal working condition. When the conveying device rises to the high position, the bracket 110 will support the steel on the steel conveyor chain. If the drive chain 230 of the unloading trolley breaks during production, the bracket 110 will automatically lower under gravity to a height lower than other brackets 110 in normal working condition, thus avoiding contact with the steel and preventing obstruction of the steel's conveying to the cooling bed output roller conveyor. There is no need to immediately handle the fault; it can be addressed after the steel conveying is completed. There is also no concern about the steel burning maintenance personnel. This method ensures both high efficiency and safety, without affecting steel conveying.

[0065] An embodiment of the present invention also provides a conveying device. The conveying device includes a conveying track and multiple cooling bed unloading trolley devices 10; the multiple cooling bed unloading trolley devices 10 are arranged side by side at intervals on the conveying track, and the multiple cooling bed unloading trolley devices 10 are used to jointly support steel.

[0066] When the conveyor rises to its highest position, the bracket 110 lifts the steel on the steel chain. If the drive chain 230 of the unloading trolley breaks during production, the bracket 110 will automatically lower under gravity, below the height of other brackets 110 in normal operation. When the conveyor rises to its highest position, the other brackets 110 in normal operation lift the steel, while the bracket 110 of the malfunctioning unloading trolley is lower in position and does not contact the steel, thus not obstructing the steel's conveying to the cooling bed output roller conveyor.

[0067] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cooling bed unloading trolley device, characterized in that, include: Car body (100); A bracket (110) is disposed above the trolley body (100) and is used to support steel. A swing frame (120) is rotatably mounted on the trolley body (100). The swing frame (120) is used to support the bracket (110) during rotation relative to the trolley body (100) and drive the bracket (110) to move upward or downward. And a transmission chain (230); the transmission chain (230) is connected to the swing frame (120), the transmission chain (230) is used to pull the swing frame (120) to rotate and stop at a preset position, and pull the trolley body (100) to move forward, so that the swing frame (120) supports the bracket (110) to move upward to a preset height; or the transmission chain (230) is used to make the swing frame (120) rotate under the action of gravity in the event of a fault disconnection, so that the bracket (110) moves downward; The swing frame (120) includes a rotating pin (200) and a swing rod (210); the rotating pin (200) is rotatably mounted on the trolley body (100), the middle part of the swing rod (210) is rotatably connected to the rotating pin (200), the swing rod (210) is connected to the transmission chain (230), one end of the swing rod (210) is used to drive the swing rod (210) to rotate under the pull of the transmission chain (230), and the other end of the swing rod (210) is used to support the bracket (110) during the rotation of the swing rod (210) relative to the trolley body (100).

2. The cooling bed unloading trolley device according to claim 1, characterized in that: The swing arm (210) includes a first rod (211) and a second rod (212) fixed to each other and arranged at an angle. The intersection of the first rod (211) and the second rod (212) is connected to the rotating pin (200). The first rod (211) is used to support the bracket (110) during the rotation of the swing arm (210) relative to the trolley body (100). The second rod (212) is used to drive the first rod (211) to rotate under the pull of the transmission chain (230).

3. The cooling bed unloading trolley device according to claim 2, characterized in that: The cooling bed unloading trolley device also includes a traction block (220); the traction block (220) is slidably disposed on the bottom side of the trolley body (100) in the horizontal direction; the end of the second rod (212) away from the first rod (211) is hinged to the traction block (220); the transmission chain (230) is connected to the traction block (220), and the traction block (220) is used to move in the horizontal direction under the pull of the transmission chain (230) and drive the first rod (211) and the second rod (212) to rotate.

4. The cooling bed unloading trolley device according to any one of claims 1-3, characterized in that: There are two swing arms (210), which are respectively disposed on both sides of the trolley body (100) and are respectively connected to both ends of the rotating pin (200); the two swing arms (210) are used to rotate synchronously under the pull of the transmission chain (230) and synchronously support the bracket (110).

5. The cooling bed unloading trolley device according to claim 4, characterized in that: The swing frame (120) also includes a support pin (240), which is rotatably mounted on the two swing arms (210) and is rotatably connected to the bracket (110). The support pin (240) is used to drive the bracket (110) to move upward or downward during the rotation of the swing arms (210) relative to the trolley body (100).

6. The cooling bed unloading trolley device according to any one of claims 1-3, characterized in that: There are two swing frames (120), which are respectively located at the front end and rear end of the trolley body (100). The two swing frames (120) together support the bracket (110).

7. The cooling bed unloading trolley device according to claim 6, characterized in that: The cooling bed unloading trolley device also includes a pull chain (300), which is connected to the swing frame (120) located at the rear end of the trolley body (100) and is connected to the transmission chain (230). The pull chain (300) is used to pull the swing frame (120) to rotate and stop at a preset position synchronously with the transmission chain (230), and the pull chain (300) is used to pull the trolley body (100) forward or backward synchronously with the transmission chain (230).

8. The cooling bed unloading trolley device according to any one of claims 1-3, characterized in that: The front end and rear end of the bracket (110) are respectively provided with limiting platforms (111), and a space for supporting steel is formed between the two limiting platforms (111).

9. A conveying device, characterized in that: The conveying device includes a conveying track and a plurality of cooling bed unloading trolley devices as described in any one of claims 1-8; the plurality of cooling bed unloading trolley devices are arranged side by side at intervals on the conveying track, and the plurality of cooling bed unloading trolley devices are used together to support steel.

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