A pallet trolley for a heat treatment furnace

Abstract

This utility model discloses a pallet-loading trolley for heat treatment furnaces, comprising several heat treatment furnaces arranged side by side. An internal furnace track is fixed inside each furnace. A transverse loading and unloading track is provided on one side of the furnace opening. A mother trolley is mounted on the loading and unloading track, and a transmission mechanism is provided between the tracks. The transmission mechanism drives the mother trolley to move left and right on the loading and unloading track. A transverse support track is provided outside the loading and unloading track, and a slidable push-pull mechanism is provided on the support track. The push-pull mechanism moves synchronously with the mother trolley. An external track is fixed on the mother trolley, and movable child trolleys are mounted on the external track and the internal furnace track. A pallet is fixed on each child trolley. The push-pull mechanism pushes the child trolleys into or pulls them out of the furnace. In this utility model, the workpiece is placed on the pallet of the child trolley, and the mother trolley delivers the child trolleys into the furnace for heat treatment. There is no need to use a forklift to access the furnace opening for loading and unloading, facilitating automation and increasing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment processing equipment, and in particular to a pallet unloading cart for a heat treatment furnace. Background Technology

[0002] A heat treatment furnace is an electric or fuel-fired furnace used for heating furnace materials for heat treatment. Commonly used heat treatment furnaces include box-type resistance furnaces, pit-type resistance furnaces, gas carburizing furnaces, and salt bath furnaces. Heat treatment is essential in mold processing and production, as it improves the performance and extends the service life of the molds. Forklifts or dedicated push-pull trolleys are typically used for loading and unloading workpieces in heat treatment furnaces. Workpieces are pushed into the furnace opening and pulled out after heat treatment.

[0003] However, in factory workshops, there are many workpiece processing equipment. In order to save space, multiple heating furnaces are usually placed side by side. When using forklifts or push-pull trolleys to load and unload materials, due to limited space and difficulty in turning the angle, the loading and unloading requires a lot of manual labor. The forklifts have to go back and forth many times, resulting in low continuity, low efficiency, and low degree of automation. These are the existing problems. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model provides a pallet loading trolley for heat treatment furnaces. It features loading and unloading tracks outside the furnace that are compatible with the internal tracks, and works in conjunction with a mother-daughter trolley to achieve automatic loading and unloading, facilitating automation and improving efficiency.

[0005] This utility model is achieved through the following technical solution:

[0006] A pallet trolley for a heat treatment furnace includes several heat treatment furnaces arranged side by side, with the furnace openings all facing one side. An internal track is fixed inside each heat treatment furnace. The furnace opening is characterized by: a transverse loading / unloading track on one side of the furnace opening; a mother car on the loading / unloading track; a transmission mechanism between the loading / unloading tracks; the transmission mechanism driving the mother car to move left and right on the loading / unloading tracks; a transverse support track outside the loading / unloading tracks; a slidable push-pull mechanism on the support track; the push-pull mechanism moving synchronously with the mother car; a longitudinal outer track fixed on the mother car; the outer track being at the same height as the internal track; movable child cars on the outer track and the internal track; a pallet fixed on each child car; and the push-pull mechanism pushing the child car into or pulling it out of the furnace.

[0007] In a further optimized manner, a conveyor track is fixed on the right side of the heat treatment furnace. The conveyor track is at the same height as the external track. The push-pull mechanism pulls the subcarriage from the conveyor track onto the mother car, or pushes the subcarriage from the mother car onto the conveyor track.

[0008] In a further optimized manner, the transmission mechanism includes a transmission groove, a fixed block, a positioning rod, a lead screw, and a servo motor. A transmission groove is provided between the loading and unloading tracks, and fixed blocks are fixed at both ends of the transmission groove. The positioning rod and the lead screw are arranged between the two fixed blocks. A synchronization block is fixed at the bottom of the mother car. The synchronization block is slidably connected to the positioning rod and threadedly connected to the lead screw. The servo motor is fixed to the outside of one end of the fixed block, and the output end of the servo motor is fixedly connected to the lead screw.

[0009] In a further optimized manner, the push-pull mechanism includes a support base, a push-pull cylinder, and a push-pull head. The support base is slidably mounted on a support rail, and the side wall of the support base is fixedly connected to the mother car. The push-pull cylinder is fixed on the support base, and the push-pull head is fixed at the output end of the push-pull cylinder, with the push-pull head facing the furnace opening side.

[0010] In a further optimized manner, a first limiting block is provided at the end of the external track away from the furnace opening.

[0011] Further optimized, the two ends of the loading and unloading track are fixed with second limiting blocks.

[0012] Further optimized, a conveyor chain is provided between the conveyor tracks, and a push-pull head is fixed on the conveyor chain.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a loading and unloading track is laid outside the heat treatment furnace. A mother car is installed on the loading and unloading track, and the mother car has an external track identical to the one inside the furnace. The workpieces are placed on the trays of the child cars, and the mother car sends each child car into the furnace for heat treatment. After the heat treatment is completed, the child cars are pulled out and sent back in sequence. With the help of the conveyor track set on one side, this invention eliminates the need for forklifts to enter and exit the furnace opening for loading and unloading, which facilitates automation and improves efficiency.

[0015] This new structure has a simple design and low cost. The pushing mechanism is fixedly connected to the mother car, and the two operate synchronously. Multiple heat treatment furnaces can share a single pushing and pulling mechanism. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2.

[0020] Figure 5 This is the front view of the present invention.

[0021] Figure 6 This is a schematic diagram of the push-pull hook in this utility model.

[0022] In the diagram: 1. Heat treatment furnace; 11. Furnace inner track; 2. Loading and unloading track; 22. First limit block; 3. Support track; 41. Transmission groove; 42. Servo motor; 43. Fixing block; 44. Positioning rod; 45. Lead screw; 5. Mother car; 51. External track; 52. Second limit block; 6. Sub-cart; 61. Pallet; 7. Push-pull mechanism; 71. Support seat; 72. Push-pull cylinder; 73. Push-pull head; 8. Workpiece; 9. Conveyor track; 91. Conveyor chain. Detailed Implementation

[0023] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the description of this invention, it should be noted that the terms "left," "right," "front," "rear," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They 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 the present invention.

[0024] like Figures 1-6 As shown, this utility model provides a pallet 61 material handling cart for a heat treatment furnace, including several heat treatment furnaces 1 arranged side by side. The furnace openings of the heat treatment furnaces all face one side. An internal track 11 is fixed inside the heat treatment furnace 1. A transverse loading and unloading track 2 is provided on one side of the furnace opening of the heat treatment furnace 1. A mother car 5 is provided on the loading and unloading track 2. A transmission mechanism is provided between the loading and unloading tracks 2. The transmission mechanism drives the mother car 5 to move left and right on the loading and unloading track 2.

[0025] A transverse support rail 3 is provided on the outer side of the loading and unloading rail 2. The support rail is parallel to the loading and unloading rail. A sliding push-pull mechanism 7 is provided on the support rail 3. The push-pull mechanism 7 is fixedly connected to the mother car 5 and moves synchronously. A longitudinal outer rail 51 is fixed on the mother car 5. The outer rail 51 is at the same height as the furnace rail 11. A movable sub-cart 6 is provided on the outer rail 51 and the furnace rail 11. A tray 61 is fixed on the sub-cart 6. The workpiece 8 is placed on the tray. The push-pull mechanism 7 is used to push and pull the sub-cart and the workpiece, pushing the sub-cart 6 from the outer rail into the furnace, or pulling the sub-cart 6 from the furnace back to the outer rail 51.

[0026] In a preferred embodiment, a conveyor track 9 is fixed on the right side of the heat treatment furnace 1. The conveyor track 9 is at the same height as the external track 51. The conveyor track is used to transport the sub-cart and the workpiece. The push-pull mechanism 7 pulls the sub-cart 6 from the conveyor track 9 onto the mother car 5, or pushes the sub-cart 6 from the mother car 5 onto the conveyor track 9. The bottom of the sub-cart is equipped with rollers 61, which allow the sub-cart to move between the conveyor track, the external track, and the furnace track.

[0027] In a preferred embodiment, the transmission mechanism includes a transmission groove 41, a fixed block 43, a positioning rod 44, a lead screw 45, and a servo motor 42. The transmission groove 41 is formed between the loading and unloading tracks 2, and fixed blocks 43 are fixed to both ends of the transmission groove 41. The positioning rod 44 and the lead screw 45 are positioned between the two fixed blocks 43. The positioning rod is fixedly connected to the fixed block, and the lead screw is rotatably connected to the fixed block. The mother car 5 is slidably connected to the loading and unloading tracks via a slide rail. A synchronization block is fixed to the bottom of the mother car 5. The synchronization block is slidably connected to the positioning rod 44 and threadedly connected to the lead screw 45. The servo motor 42 is fixed to the outside of one end of the fixed block 43. The lead screw passes through the fixed block and is fixedly connected to the output end of the servo motor 42. The output of the servo motor drives the mother car to slide left and right on the loading and unloading tracks via the lead screw.

[0028] In a preferred embodiment, the push-pull mechanism 7 includes a support base 71, a push-pull cylinder 72, and a push-pull head 73. The support base 71 has a sliding groove at its bottom and is slidably mounted on the support rail 3. The side wall of the support base 71 is fixedly connected to the mother car 5, and the mother car drives the support base to move synchronously. The push-pull cylinder 72 is fixed to the support base 71, and the push-pull head 73 is fixed to the output end of the push-pull cylinder 72, with the push-pull head 73 facing the furnace opening. The push-pull head is as follows... Figure 6 As shown, this push-pull head is a mechanical structure that can push and pull the trolley through the square steel beam at the bottom of the trolley. The specific structure of the push-pull head is described in detail in our patent application with application number 202520064964.6, entitled "A Push-Pull Integrated Push-Pull Head", which will not be repeated here.

[0029] In a preferred embodiment, the external track 51 is provided with a first limiting block 22 at the end away from the furnace opening, and the two ends of the loading and unloading track 2 are fixed with second limiting blocks 52, respectively, to prevent the mother car and the daughter car from derailing.

[0030] In a preferred embodiment, a conveyor chain 91 is provided between the conveyor tracks 9, and a push-pull head is also fixed on the conveyor chain 91. The conveyor chain can rotate in both directions and is used to transport the trolley and workpiece in conjunction with the conveyor tracks. Forklifts or hoisting equipment only need to load and unload materials on the head of the conveyor track, without having to load and unload materials at the furnace opening. This new invention facilitates automation and is more efficient.

[0031] This solution also includes a controller, the location of which is set by the operator according to the actual situation. The controller is used to control this solution and the electrical components used, including but not limited to servo motors, heat treatment furnaces, push-pull cylinders, conveyor chains, and switches. The controller is a Huawei Ascend series, PLC controller, ARM processor, or microcontroller. It is also used in conjunction with a motherboard, memory modules, storage media, and power supply.

[0032] All aspects not detailed in this utility model are well-known to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tray handling vehicle for a heat treatment furnace, comprising a plurality of heat treatment furnaces arranged side by side, the furnace openings of the heat treatment furnaces all facing one side, and an in-furnace track fixed in the heat treatment furnace, characterized in that: The heat treatment furnace has a transverse loading and unloading track on one side of the furnace opening. A mother car is mounted on the loading and unloading track, and a transmission mechanism is provided between the loading and unloading tracks. The transmission mechanism drives the mother car to move left and right on the loading and unloading tracks. A transverse support track is provided outside the loading and unloading tracks, and a sliding push-pull mechanism is provided on the support track. The push-pull mechanism moves synchronously with the mother car. A longitudinal outer track is fixed on the mother car. The outer track is at the same height as the furnace inner track. A movable daughter car is mounted on the outer track and the furnace inner track. A tray is fixed on the daughter car. The push-pull mechanism pushes the daughter car into the furnace or pulls it out of the furnace.

2. The tray handling car for a heat treatment furnace of claim 1, wherein: The heat treatment furnace is provided with a conveyor track on the right side. The conveyor track is at the same height as the external track. The push-pull mechanism pulls the trolley from the conveyor track onto the mother car, or pushes the trolley from the mother car onto the conveyor track.

3. The tray handling car for a heat treatment furnace of claim 1, wherein: The transmission mechanism includes a transmission groove, a fixed block, a positioning rod, a lead screw, and a servo motor. A transmission groove is provided between the loading and unloading tracks. Fixed blocks are fixed at both ends of the transmission groove. The positioning rod and the lead screw are arranged between the two fixed blocks. A synchronization block is fixed at the bottom of the mother car. The synchronization block is slidably connected to the positioning rod and threadedly connected to the lead screw. The servo motor is fixed to the outside of one end of the fixed block, and the output end of the servo motor is fixedly connected to the lead screw.

4. The tray handling cart for a heat treatment furnace of claim 1, wherein: The push-pull mechanism includes a support base, a push-pull cylinder, and a push-pull head. The support base is slidably mounted on a support rail, and the side wall of the support base is fixedly connected to the mother car. The push-pull cylinder is fixed on the support base, and the push-pull head is fixed at the output end of the push-pull cylinder, with the push-pull head facing the furnace opening.

5. The tray handling cart for a heat treatment furnace of claim 1, wherein: The external track is provided with a first limiting block at the end away from the furnace opening.

6. The tray handling cart for a heat treatment furnace of claim 1, wherein: The two ends of the loading and unloading track are fixed with second limit blocks.

7. The tray handling car for a heat treatment furnace of claim 2, wherein: A conveyor chain is provided between the conveyor tracks, and a push-pull head is fixed on the conveyor chain.

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