Casting sand box transfer device

Abstract

The utility model discloses a casting sand box transfer device which comprises a vehicle rail and a conveying vehicle capable of moving along the vehicle rail in a reciprocating mode, and the conveying vehicle comprises a lower vehicle frame making contact with the vehicle rail, an upper vehicle frame arranged at the upper end of the lower vehicle frame and a plurality of sand box supporting plates which can be arranged on the upper vehicle frame or a production line and are used for supporting sand boxes. The lower vehicle frame comprises a lower vehicle body with a plurality of walking wheels and a first driving assembly connected with the lower vehicle body and used for driving the walking wheels to move. The upper vehicle frame comprises two upper vehicle bodies arranged in a spaced mode, a plurality of conveying rollers rotationally arranged between the two upper vehicle bodies side by side and a second driving assembly connected with the upper vehicle bodies and used for driving the conveying rollers to rotate, and all the conveying rollers comprise roller bodies and limiting rollers correspondingly connected to the two sides of the roller bodies; a conveying space which is used for limiting the sand box supporting plate and is matched with the sand box supporting plate is formed between the two limiting rollers, when the sand box supporting plate limited in the conveying space supports the sand box to move, direction deviation cannot occur, and the sand box supporting plate can be aligned with a production line conveniently for feeding and discharging.

Description

Technical Field

[0001] This utility model belongs to the technical field of casting processing equipment, and specifically relates to a casting sand box transfer device. Background Technology

[0002] In sand casting workshops, to save floor space, production lines are typically arranged in multiple sections, with these sections distributed in parallel to conserve space. Once the production lines are set up, the device for transferring sand boxes becomes an essential piece of equipment during processing.

[0003] Traditionally, sand boxes were transported by hand-pushed carts, which was time-consuming, labor-intensive, and inefficient. To save manpower, roller conveyors are now used to transport sand boxes. However, if the position of the sand boxes is not restricted during the transport process, the sand boxes are prone to deviating from their orientation during movement, affecting the alignment with the production line. Utility Model Content

[0004] In view of the technical problem that existing technologies are prone to deviation in direction during roller conveying, which affects the transfer sand box, this utility model provides a casting sand box transfer device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A casting sand box transfer device includes rails distributed along one side of multiple parallel production lines and perpendicular to each production line, and a conveyor car capable of reciprocating along the rail arrangement direction. The conveyor car includes a lower frame in contact with the rails, an upper frame located above the lower frame, and several sand box trays that can be placed on the top surface of the upper frame or on the production line and used to support sand boxes. The lower frame includes a lower body having several wheels that can slide and engage with the rails, and a first [unclear - possibly a type of support] connected to the lower body for driving the wheels. The drive assembly includes two spaced-apart upper bodies, a plurality of conveying rollers arranged side-by-side and rotatably between the two upper bodies, and a second drive assembly connected to the upper bodies for driving all the conveying rollers to rotate around their own axes. Each conveying roller includes a roller body and corresponding limiting rollers connected to both sides of the roller body. A conveying space adapted to the sand box tray is formed between two limiting rollers to confine the sand box tray in the conveying space, and the conveying direction of the sand box is perpendicular to the traveling direction of the traveling wheels.

[0007] Furthermore, the conveying roller also includes shafts that are connected to the limiting rollers one-to-one. The first end of the shaft extends out of the limiting roller and is connected to the second drive assembly. The second end of the shaft is assembled in the roller body and fixed by bolts. The axis of the shaft is on the same straight line as the axis of the limiting roller and the axis of the roller body.

[0008] Furthermore, the limiting roller includes a conveying section and a limiting section fixed to one side of the conveying section and distributed close to the upper body. The limiting section overlaps with the center of the conveying section, and the outer diameter of the limiting section is larger than the outer diameter of the conveying section.

[0009] Furthermore, the sand box support plate includes a plate body, bottom supports located at the lower end of the plate body and spaced apart, and a support platform located at the upper end of the plate body for supporting the sand box. The outer side of the bottom support contacts the side wall of the limiting part, and the bottom surface of the bottom support contacts the conveying surface of the conveying part. The bottom support has a hollow cavity extending outward along the length direction.

[0010] Furthermore, the support platform includes a bottom panel screwed to the upper end of the plate, a support frame connected to the upper end of the bottom panel, and a top panel connected to the upper end of the support frame. A reinforcing part is formed on each of the two sides of the top panel facing the sand box conveying direction. The reinforcing part protrudes from the edge of the top panel along the length direction. The two reinforcing parts are symmetrically arranged, and each reinforcing part is provided with a reinforcing pin that can be inserted into the sand box.

[0011] Furthermore, the inner walls of the two upper vehicle bodies are bolted together with a plurality of bearing seats arranged along their length. The two upper vehicle bodies with identical structures are defined as a first vehicle body and a second vehicle body, respectively. The bearing seats on the first vehicle body and the second vehicle body are all sleeved with the first end of the shaft through internal bearings. The first end of the shaft extends along its axial direction toward the first vehicle body and passes through the first vehicle body to connect with the second drive assembly inside the first vehicle body.

[0012] Furthermore, the second drive assembly includes a double sprocket disposed within the first frame and connected one-to-one with the first end of each shaft, a plurality of chains meshing with the double sprockets, and a first drive unit whose output end is connected to one of the shafts and distributed outside the first frame. The shaft connected to the first drive unit is defined as a drive shaft, the double sprocket mounted on the drive shaft is defined as a drive sprocket, the remaining shafts are defined as driven shafts, and the double sprocket mounted on the driven shafts is defined as a driven sprocket. The drive sprocket is connected to the driven sprockets corresponding to both sides of the drive sprocket via two chains, and all of the driven sprockets are connected by a chain between every two adjacent driven sprockets.

[0013] Furthermore, the lower body includes a frame and a reinforcing mechanism located in the middle of the frame. A handle is bolted to one side of the outer wall of the frame. A side support plate is bolted to each of the four corners of the frame. The side support plate extends towards the rail. Each side support plate has a mounting cavity suspended above the rail. Each mounting cavity is fitted with a support column whose bottom surface contacts the top surface of the rail. The reinforcing mechanism includes a reinforcing rib located in the middle of the frame and several reinforcing plates located on both sides of the reinforcing rib.

[0014] Furthermore, the track includes two parallel tracks spaced apart and a plurality of track supports spaced apart and located below the tracks along the two track arrangement directions. Each track includes an upper contact portion, a middle support portion fixed to the lower end of the upper contact portion, and a lower support portion fixed to the lower end of the middle support portion. The width of the lower support portion is greater than the width of the upper contact portion. The upper contact portion, the middle support portion, and the lower support portion form an I-shaped structure on the orthographic projection plane. The track support includes a lower pad, an upper pad overlapping the upper surface of the lower pad, and a locking member located on the upper end of the upper pad for locking the track. The upper pad and the lower pad are connected to the ground by bolts. The upper pad has a positioning groove for accommodating the lower support portion, and locking members are bolted to both sides of the positioning groove to press the lower support portion into the positioning groove.

[0015] Furthermore, each of the lower pads located on the same side of the first drive assembly is connected to a side pad on one side of the lower pad. A support frame connected to the upper end of the side pad is provided along the side pad setting direction. The support frame forms an assembly groove for assembling the cable chain.

[0016] In summary, the beneficial effects of this utility model are as follows: First, the conveying space is formed by the limiting rollers located on both sides of the roller body, while the sand box pallet is restricted on both sides by the limiting parts in the limiting rollers. During the conveying process, after the first drive unit drives the conveying roller to rotate around its own axis, the sand box pallet carrying the sand box always moves between the two limiting parts, maintaining the correct direction and not deviating, which facilitates the alignment of the conveying space with each section of the production line for operation and transfer. Second, several sand box pallets can circulate and convey sand boxes in the conveying space and production system. The top panel is designed with reinforcing pins, which can more stably and firmly support the sand box, making the sand box more stable and secure during the conveying process. Third, the bottom of the track is supported by multiple track supports, which are connected to the ground by bolts. This makes disassembly and assembly convenient for changing the track position, and there are no protruding foreign objects on the ground after disassembly, which does not affect the use. Fourth, one side of one of the tracks is designed with a drag chain to accommodate various connecting wires or pipes, making the workshop wiring neater, more beautiful and less messy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a casting sand box transfer device provided by this utility model.

[0018] Figure 2 yes Figure 1 The diagram shows the structure of the device supporting the sand box.

[0019] Figure 3 This is the front view of the track in this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the lower frame of this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the upper frame in this utility model.

[0022] Figure 6 yes Figure 5 A schematic diagram of the structure of the second drive component.

[0023] Figure 7 yes Figure 6 A structural diagram showing the vehicle body and frame before they are installed.

[0024] Figure 8 yes Figure 7 A magnified view of part A in the middle.

[0025] Figure 9 This is a three-dimensional structural diagram of the sand box pallet in this utility model.

[0026] Figure 10 This is a schematic diagram of the structure of the sand box pallet and the conveying roller in the connected state in this utility model.

[0027] In the diagram, 100-rail, 110-track, 111-upper contact part, 112-middle support part, 113-lower support part, 120-track support, 121-lower pad, 1210-side pad, 1211-support frame, 122-upper pad, 123-locking component, 200-conveyor vehicle, 210-lower frame, 211-vehicle frame, 2110-side support plate, 2111-support column, 2112-handle, 212-reinforcing mechanism, 212A-reinforcing rib, 212B-reinforcing plate, 213-wheel, 214-first drive assembly, 214A-axle, 214B-second drive unit, 220-upper frame, 221-upper body, 221 0-Bearing seat, 222-Conveying roller, 2220-Roller body, 2221-Limiting roller, 2221A-Conveying part, 2221B-Limiting part, 223-Second drive assembly, 2231-Double sprocket, 2231A-First-stage transmission sprocket, 2231B-Second-stage transmission sprocket, 2232-Chain, 2233-First drive unit, 230-Sand box support plate, 231-Plate body, 232-Bottom support, 2320-Hollow cavity, 233-Support platform, 2331-Bottom panel, 2332-Support frame, 2333-Top panel, 2333A-Reinforcement part, 2333B-Reinforcement pin, 300-Drag chain, 400-Traveling stop, 500-Sand box. Detailed Implementation

[0028] The present invention will be further explained below with reference to specific illustrations.

[0029] Please see Figure 1 and Figure 2 This utility model provides a casting sand box transfer device, including rails 100 distributed on one side of multiple parallel production lines and perpendicular to each production line, and a conveyor 200 capable of reciprocating along the arrangement direction of the rails 100. The conveyor 200 includes a lower frame 210 in contact with the rails 100, an upper frame 220 located above the lower frame 210, and several sand box trays 230 that can be placed on the top surface of the upper frame 220 or on the production line and used to support sand boxes 500. The lower frame 210 includes a lower body having several wheels 213 that can slide and engage with the rails 100, and a first drive assembly 214 connected to the lower body for driving the wheels 213. (See also...) Figure 5 The upper frame 220 includes two spaced-apart upper bodies 221, a plurality of conveying rollers 222 arranged side-by-side and rotatably between the two upper bodies 221, and a second drive assembly 223 connected to the upper bodies 221 for driving all the conveying rollers 222 to rotate around their own axes. Each conveying roller 222 includes a roller body 2220 and corresponding limiting rollers 2221 connected to both sides of the roller body 2220. (See also...) Figure 10A conveying space adapted to the sand box pallet 230 is formed between the two limiting rollers 2221 to confine the sand box pallet 230 within the conveying space. The conveying direction of the conveying space is consistent with the conveying direction of each production line, and the conveying direction of the sand box 500 is perpendicular to the traveling direction of the traveling wheel 213. During the process of transferring the sand box 500 from one production line to another, the production of each sand box 500 is completed on the sand box pallet 230. Several sand box pallets 230 can move within the conveying space of the transfer device and on each production line. The port of the material in the conveying space is aligned with the unloading position of the previous production line. The conveying space is adapted to the sand box pallet 230. During the unloading process of the previous production line (loading by this device), the conveying space can guide the direction of the sand box pallet 230, smoothly allowing the sand box pallet 230 supporting the sand box 500 to enter the conveying space in a state of no deviation and always maintaining the correct orientation. When the transfer device carries the sand box 500 for transfer, the first drive component 214 is activated to drive the traveling wheels 213 along the arrangement direction of the track 100 to another production line until the conveying space is aligned with the loading position of the next production line for loading (unloading by this device). Since the conveying space formed by the limiting roller 2221 can always limit the sand box pallet 230 inside, during the movement of the conveying roller 222 when aligning for unloading, the sand box pallet 230 carrying the sand box 500 can still maintain the correct orientation and be aligned with the next production line for loading without deviating from its direction. When the sand box 500 is transferred from one production line to another using the conveying roller 222, the sand box pallet 230 carrying the sand box 500 moves together with the sand box 500 in the conveying space. Because its position is limited by the limiting roller 2221, the sand box 500 will always maintain the correct direction of movement and will not deviate, thus facilitating the loading or unloading of materials with each production line.

[0030] Please continue reading Figure 1 and Figure 2 The track 100 includes two parallel tracks 110 spaced apart and a plurality of track supports 120 spaced apart along the arrangement direction of the two tracks 110 and disposed below the tracks 110. See also... Figure 3The track 110 includes an upper contact portion 111, a middle support portion 112 fixed to the lower end of the upper contact portion 111, and a lower support portion 113 fixed to the lower end of the middle support portion 112. The width of the lower support portion 113 is greater than the width of the upper contact portion 111. The upper contact portion 111, the middle support portion 112, and the lower support portion 113 form an I-shaped structure on the orthographic projection plane. The I-beam structure is simple in material and easy to manufacture and process. The track support 120 includes a lower pad 121, an upper pad 122 overlapping the upper surface of the lower pad 121, and a locking member 123 located on the upper end of the upper pad 122 for locking the track 110. The upper pad 122 and the lower pad 121 are connected to the ground by bolts. The upper pad 122 has a positioning groove for accommodating the lower support 113, and locking members 123 for pressing the lower support 113 into the positioning groove are bolted to both sides of the positioning groove. When arranging the track 100 in the workshop, bolt holes are drilled in the ground, and the track support 120 is connected to the ground by bolts. The track 110 is then pressed and fixed by the locking members 123. This arrangement of the track 100 is simple to assemble, easy to disassemble and move, and the ground is clean and free of protruding foreign objects after disassembly, without affecting the continued processing and production in the workshop.

[0031] The lower body includes a frame 211 and a reinforcing mechanism 212 located in the middle of the frame 211. A handle 2112 is bolted to one side of the outer wall of the frame 211. Even without the rails 100, the wheels 213 can still travel on the ground. When traveling on the ground, the handle 2112 helps to more easily control the direction of the transport vehicle 200.

[0032] Please see Figure 4 Each of the four corners of the vehicle frame 211 is screwed with a side support plate 2110. The side support plate 2110 extends towards the vehicle rail 100. Each side support plate 2110 has a mounting cavity suspended above the vehicle rail 100. Each mounting cavity is equipped with a support column 2111 whose bottom surface contacts the top surface (upper contact part 111) of the vehicle rail 100. When the traveling wheel 213 travels on the track 110, it is not only supported by the traveling wheel 213, but also by the support column 2111, which improves the stability during movement.

[0033] The strengthening mechanism 212 includes a reinforcing rib 212A disposed in the middle of the frame 211 and a plurality of reinforcing plates 212B disposed on both sides of the reinforcing rib 212A. The strengthening mechanism 212 can improve the lower support strength of the conveyor 200 and provide better support stability.

[0034] The first drive assembly 214 includes at least two axles 214A passing through the frame 211 and a second drive unit 214B connected to the axles 214A for driving the wheels 213. Each axle 214A is connected to the frame 211 via a bearing housing 2210. The two ends of the axle 214A are respectively fitted into bearings in the bearing housing 2210 and extend outward from the frame 211 to connect with the wheels 213 located outside the frame 211. The bearing housing 2210 is mounted on the outside of the frame 211. After one of the axles 214A is connected to the wheels 213, it continues to extend away from the frame 211 until it is connected to the second drive unit 214B. The second drive unit 214B can be a motor. The motor drives the axle 214A to rotate around its own axis, thereby driving the wheels 213 to move back and forth on the track 110 along the arrangement direction of the track 110. Two pairs of travel blocks 400 are provided between the two tracks 110. The two travel blocks 400 in each pair are respectively distributed near the end of the track 110. The travel blocks 400 are used to limit the position of the travel wheel 213 to prevent the travel wheel 213 from derailing.

[0035] All the lower pads 121 located on the same side of the first drive assembly 214 are connected to a side pad 1210 on one side of the lower pad 121. A support frame 1211 connected to the upper end of the side pad 1210 is provided along the setting direction of the side pad 1210. The support frame 1211 forms an assembly groove for assembling the cable chain 300. Connecting wires or various pipes are housed in the cable chain 300 and are pulled and protected by the cable chain 300, making the workshop environment cleaner, more orderly, and more beautiful.

[0036] The conveying roller 222 also includes a shaft corresponding to each of the limiting rollers 2221. The first end of the shaft extends outside the limiting roller 2221 and is connected to the second drive assembly 223. The second end of the shaft is fitted inside the roller body 2220 and fixed by bolts. The axis of the shaft is on the same straight line as the axes of the limiting roller 2221 and the roller body 2220. The second drive assembly 223 drives the shaft to rotate, thereby causing the roller body 2220 and the limiting roller 2221 to rotate synchronously, thus conveying the sand box pallet 230.

[0037] The limiting roller 2221 includes a conveying section 2221A and a limiting section 2221B fixed to one side of the conveying section 2221A and distributed near the upper body 221. The limiting section 2221B overlaps with the center of the conveying section 2221A, and the outer diameter of the limiting section 2221B is larger than the outer diameter of the conveying section 2221A. The sand box pallet 230 includes a plate 231, bottom supports 232 provided at the lower end of the plate 231 and distributed at intervals, and a support platform 233 provided at the upper end of the plate 231 for supporting the sand box 500. The outer side of the bottom support 232 contacts the side wall of the limiting section 2221B, and the bottom surface of the bottom support 232 contacts the conveying surface of the conveying section 2221A. The bottom support 232 has a hollow cavity 2320 extending outward along the length direction. The hollow cavity 2320 helps to reduce the weight of the sand box pallet 230. When the sand box pallet 230 is in the conveying space, the bottom surface of the bottom support 232 moves through the conveying part 2221A. The outer side of the bottom support 232 is limited by the limiting part 2221B with the largest outer diameter to prevent the direction of movement from deviating, making it easier to align with the production line to complete the loading and unloading.

[0038] The inner walls of the two upper vehicle bodies 221 are bolted together with a plurality of bearing seats 2210 arranged along their length. The two upper vehicle bodies 221, with identical structures, are defined as the first vehicle body and the second vehicle body, respectively. The identical structure of the first vehicle body and the second vehicle body helps to reduce production and assembly difficulties. The bearing seats 2210 on the first vehicle body and the second vehicle body are all sleeved with the first end of the shaft through internal bearings. The first end of the shaft extends along its axial direction toward the first vehicle body and passes through the first vehicle body to connect with the second drive assembly 223 inside the first vehicle body.

[0039] Please see Figure 6 The second drive assembly 223 includes double sprockets 2231 disposed within the first frame and connected one-to-one with the first end of each shaft, a plurality of chains 2232 meshing with the double sprockets 2231, and a first drive unit 2233 whose output end is connected to one of the shafts and distributed outside the first frame. The shaft connected to the first drive unit 2233 is defined as a drive shaft, the double sprockets 2231 mounted on the drive shaft are defined as drive sprockets, the remaining shafts are defined as driven shafts, and the double sprockets 2231 mounted on the driven shafts are defined as driven sprockets. Each drive sprocket is connected to a driven sprocket corresponding to one of its two sides via two chains 2232, and each pair of adjacent driven sprockets is connected by one chain 2232. For details, please refer to [link to relevant documentation]. Figure 7 and Figure 8The double sprocket 2231 includes a primary transmission sprocket 2231A facing towards the first drive unit 2233, and a secondary transmission sprocket 2231B located on one side of the primary transmission sprocket 2231A and facing away from the first drive unit 2233. After the first drive unit 2233 is connected to the drive sprocket, the primary transmission sprocket 2231A and the secondary transmission sprocket 2231A on the drive sprocket each mesh with a chain 2232. These two chains 2232 mesh with driven sprockets located on both sides of the drive sprocket. The remaining primary transmission sprockets 2231A or secondary transmission sprockets 2231B on these two driven sprockets on both sides of the drive sprocket then mesh with the adjacent driven sprockets in the above manner via chains 2232. After meshing in the above manner, the rotation of the first drive unit 2233 can cause all the conveying rollers 222 to rotate.

[0040] The first drive unit 2233 can be a motor. The rotation of the motor drives the double sprocket 2231, which serves as the drive sprocket, to rotate. The two double sprockets 2231 located on both sides of the drive sprocket are connected to the adjacent double sprockets 2231 through the chain 2232. In this way, all the double sprockets 2231 connected in sequence can be driven to rotate synchronously, thereby realizing the rotation of the conveyor roller 222 and achieving the purpose of conveying the sand box pallet 230 and the sand box 500.

[0041] Please see Figure 9 The support platform 233 includes a bottom panel 2331 screwed to the upper end of the plate 231, a support frame 2332 connected to the upper end of the bottom panel 2331, and a top panel 2333 connected to the upper end of the support frame 2332. A reinforcing part 2333A is formed on each of the two sides of the top panel 2333 facing the conveying direction of the sand box 500. The reinforcing part 2333A protrudes along the length direction from the edge of the top panel 2333. The two reinforcing parts 2333A are symmetrically arranged, and each reinforcing part 2333A is provided with a reinforcing pin 2333B that can be inserted into the sand box 500. By using the reinforcing pin 2333B to insert into the corresponding hole of the sand box 500, the support stability when supporting the sand box 500 can be improved, preventing displacement of the sand box 500 during conveying.

[0042] This transfer device has two main features. First, a conveying space is formed by limiting rollers 2221 located on both sides of the roller body 2220. The sand box pallet 230 is restricted on both sides by limiting parts 2221B in the limiting rollers 2221. During the conveying process, after the first drive unit 2233 drives the conveying roller 222 to rotate around its own axis, the sand box pallet 230, carrying the sand box 500, always moves between the two limiting parts 2221B, maintaining the correct direction and preventing deviation, thus facilitating the alignment of the conveying space with each section of the production line for transfer. Second, several sand box pallets 230 can circulate and transfer the sand box 500 within the conveying space and on the production line. The top panel 2333 is designed with reinforcing pins 2333B, which can more stably and firmly support the sand box 500, making the sand box 500 more stable and secure during the conveying process. Thirdly, the bottom of track 110 is supported by multiple track supports 110, and the track supports 120 are connected to the ground by bolts. This makes disassembly and assembly convenient for changing the position of track 100, and there are no protruding foreign objects on the ground after removal, so it does not affect use. Fourthly, one side of one of the tracks 110 is designed with a cable chain 300 to accommodate various connecting wires or pipes, making the workshop wiring neater, more aesthetically pleasing and less messy.

[0043] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A casting sand box transfer device, characterized in that: The system includes rails distributed along one side of multiple parallel production lines and perpendicular to each production line, and a conveyor vehicle capable of reciprocating along the rail arrangement direction. The conveyor vehicle includes a lower frame in contact with the rails, an upper frame located on the upper end of the lower frame, and several sand box trays that can be placed on the top surface of the upper frame or on the production line and used to support sand boxes. The lower frame includes a lower body with several wheels that can slide and engage with the rails, and a first drive assembly connected to the lower body to drive the wheels. The upper frame includes two spaced-apart upper bodies, several conveying rollers arranged side by side and rotatably between the two upper bodies, and a second drive assembly connected to the upper body to drive all the conveying rollers to rotate around their own axis. All the conveying rollers include a roller body and corresponding limiting rollers connected to both sides of the roller body. A conveying space adapted to the sand box trays is formed between the two limiting rollers to confine the sand box trays within the conveying space, and the conveying direction of the sand boxes is perpendicular to the traveling direction of the wheels.

2. The casting sand box transfer device according to claim 1, characterized in that: The conveying roller also includes shafts that are connected to the limiting rollers one by one. The first end of the shaft extends out of the limiting roller and is connected to the second drive assembly. The second end of the shaft is assembled in the roller body and fixed by bolts. The axis of the shaft is on the same straight line as the axis of the limiting roller and the axis of the roller body.

3. The casting sand box transfer device according to claim 2, characterized in that: The limiting roller includes a conveying section and a limiting section fixed to one side of the conveying section and distributed close to the upper body. The limiting section overlaps with the center of the conveying section, and the outer diameter of the limiting section is larger than the outer diameter of the conveying section.

4. A casting sand box transfer device according to claim 3, characterized in that: The sand box support plate includes a plate body, bottom supports located at the lower end of the plate body and spaced apart, and a support platform located at the upper end of the plate body for supporting the sand box. The outer side of the bottom support contacts the side wall of the limiting part, and the bottom surface of the bottom support contacts the conveying surface of the conveying part. The bottom support has a hollow cavity extending outward along the length direction.

5. A casting sand box transfer device according to claim 4, characterized in that: The support platform includes a bottom panel screwed to the upper end of the plate, a support frame connected to the upper end of the bottom panel, and a top panel connected to the upper end of the support frame. A reinforcing part is formed on each of the two sides of the top panel facing the sand box conveying direction. The reinforcing part protrudes from the edge of the top panel along the length direction. The two reinforcing parts are symmetrically arranged, and each reinforcing part is provided with a reinforcing pin that can be inserted into the sand box.

6. A casting sand box transfer device according to claim 2, characterized in that: The inner walls of the two upper vehicle bodies are bolted together with a number of bearing seats arranged along their length. The two upper vehicle bodies with the same structure are defined as a first vehicle body and a second vehicle body, respectively. The bearing seats on the first vehicle body and the second vehicle body are all sleeved with the first end of the shaft through internal bearings. The first end of the shaft extends along its axial direction toward the first vehicle body and passes through the first vehicle body to connect with the second drive assembly inside the first vehicle body.

7. A casting sand box transfer device according to claim 6, characterized in that: The second drive assembly includes a double sprocket disposed within the first frame and connected one-to-one with the first end of the shaft, a plurality of chains meshing with the double sprockets, and a first drive unit whose output end is connected to one of the shafts and distributed outside the first frame. The shaft connected to the first drive unit is defined as a drive shaft, the double sprocket mounted on the drive shaft is defined as a drive sprocket, the remaining shafts are defined as driven shafts, and the double sprocket mounted on the driven shafts is defined as a driven sprocket. The drive sprocket is connected to the driven sprockets corresponding to both sides of the drive sprocket by two chains, and all of the driven sprockets are connected by a chain for every two adjacent driven sprockets.

8. A casting sand box transfer device according to claim 1, characterized in that: The lower body includes a frame and a reinforcing mechanism located in the middle of the frame. A handle is bolted to one side of the outer wall of the frame. A side support plate is bolted to each of the four corners of the frame. The side support plates extend towards the rail. Each side support plate has a mounting cavity suspended above the rail. Each mounting cavity is fitted with a support column whose bottom surface contacts the top surface of the rail. The reinforcing mechanism includes a reinforcing rib located in the middle of the frame and several reinforcing plates located on both sides of the reinforcing rib.

9. A casting sand box transfer device according to any one of claims 1-8, characterized in that: The track includes two parallel tracks spaced apart and several track supports spaced apart and located below the tracks along the direction of the two tracks. Each track includes an upper contact portion, a middle support portion fixed to the lower end of the upper contact portion, and a lower support portion fixed to the lower end of the middle support portion. The width of the lower support portion is greater than the width of the upper contact portion. The upper contact portion, the middle support portion, and the lower support portion form an I-shaped structure on the orthographic projection plane. Each track support includes a lower pad, an upper pad overlapping the upper surface of the lower pad, and a locking member located on the upper end of the upper pad for locking the track. The upper pad and the lower pad are connected to the ground by bolts. The upper pad has a positioning groove for accommodating the lower support portion, and locking members are bolted to both sides of the positioning groove to press the lower support portion into the positioning groove.

10. A casting sand box transfer device according to claim 9, characterized in that: All the lower pads located on the same side of the first drive assembly are connected to a side pad on one side of the lower pad. A support frame connected to the upper end of the side pad is provided along the side pad setting direction. The support frame forms an assembly groove for assembling the cable chain.

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