A discharge device and quenching system

Abstract

The utility model relates to heat treatment equipment technical field discloses a kind of loading and discharging device, comprising: ground rail assembly, loading and discharging machine and tray;Ground rail assembly includes first ground rail, second ground rail and third ground rail;The first ground rail and third ground rail are all along first direction extension, and first ground rail extends to quenching area, third ground rail extends to loading and discharging area, second ground rail extends along second direction, and loading and discharging machine includes transfer trolley, transfer trolley and bracket mechanism;Transfer trolley is movably arranged on the second ground rail, and first track extending along first direction is arranged on transfer trolley, and transfer trolley is movably arranged on first track, and the bracket mechanism is installed on transfer trolley;Tray is placed on the bracket mechanism of transfer trolley.Workpiece is transferred along first ground rail, second ground rail and third ground rail by transfer trolley, transfer trolley, and completes heat treatment and loading and discharging work, equipment height reduces, entire process does not need to be hoisted, effectively reduces security risk.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment technology, specifically to a loading and unloading device and a quenching system. Background Technology

[0002] In existing technologies, metal workpieces are typically transported by hoisting. For example, the workpiece is secured with chains or clamps and then moved by an overhead crane. During hoisting, the metal workpiece is lifted to a certain height; improper operation or equipment malfunction could lead to a sudden fall from a height, causing a serious accident. Furthermore, during heat treatment, larger workpieces, after austenitizing heating in a quenching furnace, have reduced strength. Using traditional chains or clamps for hoisting can easily cause bending deformation and damage, making straightening and recovery impossible after tempering, or causing excessive depth damage from the clamps, resulting in scrap. Therefore, there is an urgent need to design a loading and unloading device for transporting metal workpieces on the ground to improve safety and prevent damage to larger workpieces during quenching hoisting. Utility Model Content

[0003] The purpose of this invention is to provide a loading and unloading device to solve the problem mentioned in the background art that metal workpieces are prone to falling from heights and causing serious accidents when transported by traditional hoisting methods.

[0004] Another objective of this invention is to provide a quenching system including the above-mentioned loading and unloading device, which uses the loading and unloading device to transfer the workpiece during the quenching process, effectively avoiding the problem that traditional hoisting methods can easily cause large workpieces to bend and deform.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A loading and unloading device, comprising:

[0007] The ground rail assembly includes a first ground rail, a second ground rail, and a third ground rail; the first ground rail and the third ground rail are arranged side by side, both extending along a first direction, with the first ground rail extending to the quenching zone and the third ground rail extending to the loading / unloading zone; the second ground rail extends along a second direction and is located on the side of the first ground rail away from the quenching zone and the third ground rail away from the loading / unloading zone; the first direction is perpendicular to the second direction.

[0008] A loading and unloading machine includes a transfer trolley, a transfer carriage, and a support arm mechanism. The transfer trolley is movably mounted on a second ground rail and has a first track extending in a first direction. The transfer carriage is movably mounted on the first track, and the support arm mechanism is mounted on the transfer carriage. When the transfer trolley moves along the second ground rail, the first track can connect with either the first or third ground rail to allow the transfer carriage to move along either the first or third ground rail.

[0009] The workpiece is placed on a pallet, which is then placed on the support arm mechanism of the transfer trolley. With this setup, the workpiece is transferred by the transfer trolley and transfer carriage along the first, second, and third ground rails to complete heat treatment and loading / unloading operations. This reduces the equipment height, eliminates the need for hoisting during the entire process, and effectively reduces safety hazards.

[0010] Furthermore, the support arm mechanism includes a support arm and a support arm lifting assembly; the support arm is vertically and flexibly mounted on the transfer trolley via the support arm lifting assembly. With the above configuration, the support arm can be raised and lowered for easy pallet retrieval.

[0011] Furthermore, the support arm includes multiple first support bars, which are arranged side by side and all extend along a first direction, with a first gap between adjacent first support bars.

[0012] Furthermore, the lifting arm assembly includes a lifting cylinder, a third track, a fixed plate, and a lifting plate; the fixed plate is disposed on a transfer trolley, and a third track distributed vertically is disposed on the side of the fixed plate near the side opening of the heating furnace; the lifting plate is connected to the third track via rollers; the lifting cylinder is used to push the lifting plate to distribute vertically; and the lifting plate is connected to the lifting arm.

[0013] Furthermore, the transfer trolley includes a first traveling mechanism, which comprises a first motor, a first transmission mechanism, and first traveling wheels. The transfer trolley is connected to a second ground rail via the first traveling wheels. The first motor is mounted on the transfer trolley, and its output shaft is connected to the first traveling wheels via the first transmission mechanism. The first transmission mechanism includes a first reducer and a transmission shaft. The output end of the first motor is connected to the first reducer, and the first reducer is connected to one of the first traveling wheels via the transmission shaft.

[0014] Furthermore, the first reducer is a dual-shaft reducer, and both output ends of the first reducer are connected to the corresponding first traveling wheels via drive shafts.

[0015] Furthermore, the transfer trolley includes a second traveling mechanism, which includes a second motor, a second transmission mechanism, and a second traveling wheel; both the second traveling wheel and the second motor are mounted on the transfer trolley, and the output shaft of the second motor is connected to the second traveling wheel through the second transmission mechanism to drive the transfer trolley to reciprocate along a first direction.

[0016] The second transmission mechanism includes a first transmission gear and a second transmission gear. The output end of the second motor is connected to the first transmission gear, the second transmission gear is coaxially connected to one of the second traveling wheels, and the second transmission gear meshes with the first transmission gear.

[0017] Furthermore, there are two of each of the first, second, and third ground rails. This configuration improves the operational stability of the transfer trolley and transfer carriage.

[0018] A quenching system includes the aforementioned loading and unloading device, and further includes a quenching zone, wherein the quenching zone is provided with a quenching tank and a heating furnace; the quenching tank and the heating furnace are arranged sequentially along a first direction, the heating furnace has a lateral opening facing the quenching tank, and an openable and closable furnace door is provided on the outer side of the lateral opening; a liftable quenching machine is provided in the quenching tank so that the quenching machine can be exposed or immersed in the quenching tank, and a first ground rail is located on both sides of the quenching tank and extends to the lateral opening of the heating furnace.

[0019] Furthermore, the distance between the quenching tank and the heating furnace is 200–400 mm. This effectively shortens the distance between them and reduces heat loss from the workpiece.

[0020] Furthermore, the quenching tank also includes a quenching lifting component and a second track; the second track is arranged vertically on the inner wall of the quenching tank, the quenching machine is movably arranged on the second track, and the quenching lifting component is used to drive the quenching machine to rise and fall.

[0021] Furthermore, the quenching machine includes a quenching carriage and a bracket; the quenching carriage is connected to a second track, and the bracket is located on top of the quenching carriage to support the pallet.

[0022] Furthermore, the number of quenching lifting components is two sets, distributed on both sides of the heating furnace. Each set of quenching lifting components includes a hydraulic cylinder, a reversing pulley, and a steel wire rope. A reversing pulley is installed at the corner of the quenching tank near the heating furnace. The output ends of the hydraulic cylinders are distributed along a second direction and connected to the steel wire rope. The steel wire rope passes around the reversing pulley and connects to the quenching trolley. The hydraulic cylinder outputs a pulling force along the second direction, and after the steel wire rope is reversed by the reversing pulley, it drives the quenching trolley to move vertically.

[0023] Furthermore, a plurality of guide blocks are arranged at intervals in the lateral opening of the heating furnace along the first direction, and the guide blocks are arranged corresponding to the first interval.

[0024] Furthermore, the bracket includes multiple second support bars, all of which extend along a second direction and are arranged side by side along a first direction. There is a second interval between two adjacent second support bars, and the first interval and the second interval are staggered so that the first support bar can extend into the second interval, which facilitates the arm to pick up or place the tray.

[0025] When the workpiece is in the shape of a stepped shaft, shims can be placed on the pallet to support the small diameter section of the stepped shaft forging.

[0026] This invention has the following advantages over the prior art:

[0027] 1. The loading and unloading device of this utility model includes a ground rail assembly, a loading and unloading machine, and a pallet; wherein, the ground rail assembly includes a first ground rail, a second ground rail, and a third ground rail. The first ground rail leads to the quenching zone, and the second ground rail leads to the loading zone. The second ground rail is located on the side of the first ground rail away from the quenching zone and the third ground rail away from the loading and unloading zone. The transfer trolley in the loading and unloading machine can travel along the second ground rail. A first track is set on the transfer trolley, and the transfer trolley can travel along the first track. When the first track is connected to the first ground rail, the transfer trolley can move onto the first ground rail. When the first track is connected to the third ground rail, the transfer trolley can move onto the third ground rail. The support arm mechanism of the transfer trolley supports the workpiece on the pallet, so that the workpiece moves along the ground rail assembly with the transfer trolley and the transfer trolley to complete the heat treatment and loading and unloading work. The whole process does not require hoisting, effectively reducing safety hazards. Moreover, the large and small transfer carts, together with the pallets, transport large workpieces, so that after heating, they do not need to be lifted by iron chains or clamps with the overhead crane, effectively avoiding bending of the workpieces during the lifting process or damage to the heated red steel by the clamps.

[0028] 2. The quenching system of this utility model includes a loading and unloading device and a quenching zone opposite to the loading and unloading device. The quenching zone is provided with quenching tanks and heating furnaces arranged sequentially along a first direction. By setting up a first ground rail and a transfer trolley, the distance between the quenching tank and the heating furnace is shortened to 200-400mm, which effectively shortens the time for the workpiece to be transferred from the heating furnace to the quenching tank, reduces heat loss, and ensures the quenching effect. Attached Figure Description

[0029] Figure 1 This is a top view of the ground rail assembly in the loading and unloading device of this utility model embodiment (please supplement accordingly);

[0030] Figure 2 This is a side view of the loading and unloading machine in the loading and unloading device of this utility model embodiment;

[0031] Figure 3 This is a side view of the quenching system in an embodiment of the present invention;

[0032] Figure 4 This is a side view of the quenching tank in an embodiment of the present invention.

[0033] In the diagram: 1. First ground rail; 2. Second ground rail; 3. Third ground rail; 4. Quenching zone; 5. Loading / unloading zone; 6. Transfer trolley; 601. Support arm; 6011. First support bar; 602. Lifting cylinder; 603. Fixed plate; 604. Lifting plate; 605. Second traveling mechanism; 7. Pallet; 8. Transfer trolley; 801. First track; 802. First reducer; 803. Drive shaft; 804. First traveling wheel; 9. Quenching tank; 901. Quenching machine; 902. Second track; 903. Quenching trolley; 904. Bracket; 905. Hydraulic cylinder; 906. Reversing pulley; 907. Wire rope; 10. Heating furnace; 1001. Side opening; 1002. Furnace door; 11. Shim; 12. Limiting block; 13. Workpiece. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0038] Example:

[0039] like Figure 1 and Figure 2 As shown, this utility model provides a loading and unloading device, including: a ground rail assembly, a loading and unloading machine, and a tray 7; the ground rail assembly includes a first ground rail 1, a second ground rail 2, and a third ground rail 3; the first ground rail 1 and the third ground rail 3 are arranged side by side, both extending along a first direction, with the first ground rail 1 extending to a quenching zone 4 and the third ground rail 3 extending to a loading and unloading zone 5; the second ground rail 2 extends along a second direction and is located on the side of the first ground rail 1 away from the quenching zone 4 and the third ground rail 3 away from the loading and unloading zone 5, the first direction being perpendicular to the second direction; the loading and unloading machine includes a transfer trolley 6. The system comprises a transfer trolley 8 and a support arm mechanism. The transfer trolley 8 is movably mounted on the second ground rail 2, and a first track 801 extending in a first direction is provided on the transfer trolley 8. The transfer trolley 6 is movably mounted on the first track 801, and the support arm mechanism is installed on the transfer trolley 6. When the transfer trolley 8 moves along the second ground rail 2, the first track 801 can connect with either the first ground rail 1 or the third ground rail 3, so that the transfer trolley 6 can move along either the first ground rail 1 or the third ground rail 3. The workpiece 13 is placed on the pallet 7, and the pallet 7 is placed on the support arm mechanism of the transfer trolley 6. By setting up a ground rail assembly, the transfer trolley 8 and the transfer trolley 6 travel along the ground rail assembly, reducing the working height of the device and eliminating the need for hoisting during the entire process, effectively reducing safety hazards.

[0040] The loading / unloading area 5 is used to place pallets. Workpieces 13 to be quenched are manually placed on the pallets. A transfer trolley 6 travels along the third track to the loading / unloading area 5 to pick up the pallets carrying the workpieces. The transfer trolley 6 then returns to the transfer trolley 8, which travels along the second ground track 2 to the first ground track 1. The first track 901 connects with the first ground track 1, allowing the transfer trolley to move along the first ground track, coordinating with the device in the quenching area. After the workpieces have completed quenching, the transfer trolley 6, relying on the transfer trolley, returns to the third ground track, placing the quenched workpieces and pallets into the loading / unloading area 5, awaiting manual removal of the quenched workpieces. The workpieces to be quenched are then replenished to the pallets. Workpieces 13 are transferred by the transfer trolley 6 and the transfer trolley 8 along the first ground track 1, the second ground track 2, and the third ground track 3, completing the heat treatment and loading / unloading process. The entire process requires no hoisting, effectively reducing safety hazards. Moreover, the large and small transfer carts, together with the pallets, transport large workpieces, so that after heating, they do not need to be lifted by iron chains or clamps with the overhead crane, effectively avoiding bending of the workpieces during the lifting process or damage to the heated red steel by the clamps.

[0041] Specifically, the support arm mechanism includes a support arm 601 and a support arm lifting assembly; the support arm 601 is vertically and flexibly mounted on the transfer trolley 6 via the support arm lifting assembly. This configuration allows the support arm to be raised and lowered, facilitating pallet retrieval. The support arm 601 includes multiple first support bars 6011, arranged side-by-side and extending along a first direction, with a first gap between adjacent first support bars. The structure of the support arm 601 cooperates with the bracket 904 of the quenching trolley, facilitating pallet transfer between the two.

[0042] The lifting arm assembly includes a lifting cylinder 602, a third track, a fixing plate 603, and a lifting plate 604. The fixing plate 603 is mounted on the transfer trolley 6. The third track is arranged vertically on the side of the fixing plate 603 near the side opening of the heating furnace. The lifting plate 604 is connected to the third track via rollers. The lifting cylinder 602 is used to push the lifting plate 604 vertically. The lifting plate 604 is connected to the lifting arm 601.

[0043] The transfer trolley 8 includes a first traveling mechanism, which comprises a first motor, a first transmission mechanism, and first traveling wheels 804. The transfer trolley 8 is connected to a second ground rail 2 via the first traveling wheels 804. The first motor is mounted on the transfer trolley 8, and its output shaft is connected to the first traveling wheels 804 via the first transmission mechanism. The first transmission mechanism includes a first reducer 802 and a transmission shaft 803. The output end of the first motor is connected to the first reducer 802, and the first reducer 802 is connected to one of the first traveling wheels 804 via the transmission shaft 803. The transfer trolley 8 can be a flat plate, with a first track 801 on its upper surface and the first traveling mechanism mounted below. A limit block 12 is provided on the first track 804 to prevent the transfer trolley 6 from detaching from the first track 804. In this embodiment, the first reducer is a dual-shaft reducer, and both output ends of the first reducer are connected to the corresponding first traveling wheels via transmission shafts. In another embodiment, the bottom of the transfer trolley 8 is provided with multiple sets of first walking mechanisms. Each set of walking mechanisms includes a first motor, a dual-shaft reducer, two drive shafts 803 and two first walking wheels 804. The first motors in each set of walking mechanisms work synchronously to jointly drive the transfer trolley 8 to move along the second ground rail 7.

[0044] The transfer trolley 6 includes a second traveling mechanism 605 (not specifically shown in the figure), the second traveling mechanism 605 includes a second motor, a second transmission mechanism and a second traveling wheel; the second traveling wheel and the second motor are both mounted on the transfer trolley 6, and the output shaft of the second motor is connected to the second traveling wheel through the second transmission mechanism to drive the transfer trolley 6 to reciprocate along the first direction.

[0045] The second transmission mechanism includes a first transmission gear and a second transmission gear. The output end of the second motor is connected to the first transmission gear, and the second transmission gear is coaxially connected to one of the second traveling wheels. The second transmission gear meshes with the first transmission gear. In specific implementations, other structures with the same effect can be used to replace the first traveling mechanism, the second traveling mechanism, and the support arm lifting assembly.

[0046] There are two of each of the first ground rail 1, the second ground rail 2, and the third ground rail 3. This configuration improves the operational stability of the transfer trolley and the transfer vehicle.

[0047] like Figure 1 and Figure 3 As shown, a quenching system includes the above-mentioned loading and unloading device, and also includes a quenching zone 4. The quenching zone 4 is provided with a quenching tank 9 and a heating furnace 10. The quenching tank 9 and the heating furnace are arranged sequentially along a first direction of 10. The heating furnace 10 has a lateral opening 1001 facing the quenching tank 9. An openable and closable furnace door 1002 is provided on the outside of the lateral opening 1001. A liftable quenching machine 901 is provided in the quenching tank 9 so that the quenching machine 901 can be exposed or immersed in the quenching tank 9. The first ground rail 1 is located on both sides of the quenching tank 9 and extends to the lateral opening 1001 of the heating furnace 10.

[0048] In existing technologies, because overhead cranes are used to transfer heated workpieces, a trolley length of approximately 6 meters is required between the quenching tank and the heating furnace. The trolley needs to move out of the heating furnace, and then the overhead crane lifts the workpiece from the trolley into the quenching tank. In this embodiment, by setting a first ground rail 1, the transfer trolley 6 travels along the first ground rail 1 to the quenching tank and the heating furnace, reducing the distance between the quenching tank 9 and the heating furnace 10 to 200-400 mm. This has the following beneficial effects:

[0049] (1) Reduce heat loss: The workpiece needs to be kept at a high temperature during quenching. The close distance between the quenching tank and the heating furnace can shorten the transportation path, reduce the heat dissipation during transportation, ensure that the temperature of the workpiece meets the quenching requirements when it enters the tank, and ensure the quenching effect (such as hardness, wear resistance, etc.).

[0050] (2) Improve production efficiency: shorten transportation time, avoid repeated heating or process delays caused by temperature drop, make the quenching process more continuous, and improve overall production efficiency.

[0051] (2) Reduce process risks: The long distance between the quenching tank and the heating furnace results in a long transfer time for the heated workpiece. If the workpiece temperature drops significantly during the transfer, it may affect the cooling effect of the quenching medium (such as oil or water), and may even lead to problems such as quenching cracking and deformation. A closer distance can reduce such risks and ensure the stability of workpiece quality.

[0052] The quenching tank 9 also includes a quenching lifting assembly and a second track 902. The second track 902 is vertically arranged on the inner wall of the quenching tank 9. The quenching machine 901 is movably arranged on the second track 902. The quenching lifting assembly is used to drive the quenching machine 901 to rise and fall. The quenching machine 901 includes a quenching carriage 903 and a bracket 904. The quenching carriage 903 is connected to the second track 902, and the bracket 904 is arranged on the top of the quenching carriage 903 to support the tray 7.

[0053] Two sets of quenching lifting components are provided, distributed on both sides of the heating furnace 10. Each set includes a hydraulic cylinder 905, a reversing pulley 906, and a wire rope 907. The reversing pulley 906 is installed at the corner of the quenching tank 9 near the heating furnace 10. The output end of the hydraulic cylinder 905 is distributed along a second direction and connected to the wire rope 907. The wire rope 907 passes around the reversing pulley 906 and connects to the quenching carriage. The hydraulic cylinder 905 outputs tension along the second direction. After the wire rope 907 is reversed by the reversing pulley 906, it drives the quenching carriage 903 to move vertically. (Reference) Figure 1 Each hydraulic cylinder can correspond to two reversing pulleys, improving the lifting stability of the quenching trolley.

[0054] Multiple guide blocks are arranged at intervals along a first direction within the lateral opening 1001 of the heating furnace 10, with each guide block corresponding to a first interval. These guide blocks provide guidance for the first support bar of the support arm 601, facilitating its entry and exit from the heating furnace.

[0055] The bracket 904 of the quenching trolley 903 includes multiple second support bars. The multiple second support bars extend along a second direction and are arranged side by side along a first direction. There is a second interval between two adjacent second support bars. The first interval and the second interval are staggered so that the first support bar 6011 can extend into the second interval, which facilitates the support arm 601 to pick up or place the tray 7.

[0056] When the workpiece 13 is in the shape of a stepped shaft, a shim 11 can be set on the tray to support the small diameter section of the stepped shaft forging.

[0057] In practice:

[0058] Pallets 7 are placed in loading / unloading area 5, and workpieces requiring quenching are placed on pallets 7. The transfer trolley 6 travels along the third ground rail 3 to loading / unloading area 5. The lifting arm assembly on the transfer trolley lowers the lifting arm 601 via the lifting cylinder 602, thereby picking up pallets 7. The transfer trolley 6 then carries pallets 7 back along the third ground rail 3 to the transfer trolley 8, and follows the transfer trolley 8 to the first ground rail 1. The transfer trolley 6 then places pallets 7 into the heating furnace 10 for heating. After completion, the pallet 7 is transferred to the quenching trolley 903, which quenches the workpiece by moving up and down in the quenching tank 9. After quenching, the transfer trolley 6 returns to the transfer trolley 8 along the first ground rail 1. The transfer trolley 8 takes the transfer trolley 6 back to the loading and unloading area 5. The support arm 601 on the transfer trolley 6 lowers and puts down the quenched pallet 1 and workpiece, waiting for the quenched workpiece to be taken away. Then another workpiece to be quenched is placed. The transfer trolley 6 picks up the pallet 7 and continues the next quenching process.

[0059] This invention employs a ground-rail transfer system with a loading and unloading machine to avoid high-altitude transport and prevent accidents caused by improper operation or equipment malfunction, such as falling objects or damaging equipment. The quenching process utilizes a loading and unloading machine and a pallet (with workpieces placed on the pallet) to load and unload the workpieces from the furnace. The quenching process itself uses a liftable support and a pallet to immerse and remove the workpieces from water for quenching. This prevents excessive bending during traditional hoisting processes, which can lead to difficulties in straightening later, or damage to the workpieces at high temperatures caused by clamps.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A loading and unloading device, characterized in that, include: The ground rail assembly includes a first ground rail, a second ground rail, and a third ground rail; The first ground rail and the third ground rail are arranged side by side. Both the first ground rail and the third ground rail extend along the first direction. The first ground rail extends to the quenching zone, and the third ground rail extends to the loading and unloading zone. The second ground rail extends along the second direction and is located on the side of the first ground rail away from the quenching zone and the third ground rail away from the loading and unloading zone. The first direction is perpendicular to the second direction. The loading and unloading machine includes a transfer trolley, a support arm mechanism, and a transfer trolley; the transfer trolley is movably mounted on the second ground rail, and the transfer trolley is provided with a first track extending in a first direction; the transfer trolley is movably mounted on the first track, and the support arm mechanism is mounted on the transfer trolley; When the transfer trolley moves along the second ground rail, the first rail can be connected to the first ground rail or the third ground rail so that the transfer trolley can move along the first ground rail or the third ground rail. The workpiece is placed on the pallet, and the pallet is placed on the support arm mechanism of the transfer trolley.

2. The loading and unloading device according to claim 1, characterized in that: The support arm mechanism includes a support arm and a support arm lifting assembly; the support arm is vertically mounted on the transfer trolley via the support arm lifting assembly.

3. The loading and unloading device according to claim 2, characterized in that: The support arm includes multiple first support bars, which are arranged side by side and all extend along a first direction, with a first gap between adjacent first support bars.

4. The loading and unloading device according to claim 1, characterized in that: The transfer trolley includes a first traveling mechanism, which includes a first motor, a first transmission mechanism, and a first traveling wheel. The transfer trolley is connected to a second ground rail via the first traveling wheel. The first motor is mounted on the transfer trolley, and the output shaft of the first motor is connected to the first traveling wheel via the first transmission mechanism.

5. The loading and unloading device according to claim 1, characterized in that: The transfer trolley includes a second traveling mechanism, which includes a second motor, a second transmission mechanism, and a second traveling wheel. The second traveling wheel and the second motor are both mounted on the transfer trolley. The output shaft of the second motor is connected to the second traveling wheel through the second transmission mechanism to drive the transfer trolley to reciprocate along a first direction.

6. The loading and unloading device according to claim 1, characterized in that: There are two of each of the first, second, and third ground rails.

7. A quenching system, characterized in that, The loading and unloading device according to any one of claims 1 to 6 further includes a quenching zone, wherein the quenching zone is provided with a quenching tank and a heating furnace; the quenching tank and the heating furnace are arranged sequentially along a first direction, the heating furnace has a lateral opening facing the quenching tank, and an openable and closable furnace door is provided on the outer side of the lateral opening; a liftable quenching machine is provided in the quenching tank so that the quenching machine can be exposed or immersed in the quenching tank, and the first ground rail is located on both sides of the quenching tank and extends to the lateral opening of the heating furnace.

8. The quenching system according to claim 7, characterized in that: The distance between the quenching tank and the heating furnace is 200-400 mm.

9. The quenching system according to claim 7, characterized in that: The quenching tank also includes a quenching lifting component and a second track; the second track is arranged vertically on the inner wall of the quenching tank, the quenching machine is movably arranged on the second track, and the quenching lifting component is used to drive the quenching machine to rise and fall.

10. The quenching system according to claim 9, characterized in that: The quenching machine includes a quenching carriage and a bracket; the quenching carriage is connected to a second track, and the bracket is located on top of the quenching carriage to support the pallet.

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