Sand box transfer trolley

Abstract

The utility model discloses a sand box transfer trolley, and belongs to the field of casting equipment. According to the technical scheme, the sand box transfer trolley comprises a trolley body and a sand box carrying structure arranged on the trolley body, a fixing frame is arranged on the trolley body, the fixing frame is connected with a lifting frame through a lifting structure, and the sand box carrying structure is arranged on the lifting frame; the lifting structure comprises a telescopic driving device, a gear is rotationally installed at the lifting end of the telescopic driving device, a fixing rack is arranged on the fixing frame, a lifting rack is arranged on the lifting frame, and the gear is located between the fixing rack and the lifting rack and meshed with the fixing rack and the lifting rack at the same time. According to the scheme, the double-rack mechanism is designed, the gear is driven to ascend, the gear rotates under the action of the fixed rack and further drives the lifting rack to ascend, finally, the lifting frame obtains displacement which is two times the elongation of the telescopic driving device, the situation that the rigidity is reduced due to the fact that the telescopic driving device extends too long is avoided, and the overall stability of the transfer trolley is improved.

Description

Technical Field

[0001] The utility model relates to the field of casting equipment, in particular to a sand box transfer vehicle. Background Art

[0002] Casting involves heating a metal or non-metallic material to a molten state, pouring it into a pre-designed mold, and then removing it from the mold after cooling and solidification, resulting in a casting with the desired shape, size, and properties. This process involves multiple steps, including raw material preparation, smelting, pouring, cooling, demolding, cleaning, heat treatment, and processing. The primary purpose of sandbox cooling is to gradually cool the cast casting to or near room temperature within the sand mold, facilitating subsequent demolding, cleaning, and processing.

[0003] The foundry industry is developing a trend toward maximizing space utilization within limited plant space. Increasing the density of flasks in the cooling process allows for full utilization of space to accommodate more flasks, thereby increasing production capacity. As the primary transfer equipment for multi-layer casting cooling lines in foundries, lift and transfer vehicles are essential. These flask lift and transfer vehicles typically have a minimum single-layer lift height of 2 meters. The total weight of the flasks and lift frame after casting is approximately 10 to 30 tons. Their design requires a low overall height while maintaining stable lifting. This height significantly impacts assembly space, assembly difficulty, vehicle stability, and plant height.

[0004] The common winch lifting device has the disadvantage of requiring a drum pulley to be installed on the top. The cylinder-driven rack and pinion transmission method is smoother, but the driving stroke is too long and the heavy load will cause unstable cylinder oil pressure and poor rigidity. Summary of the Invention

[0005] Aiming at the problems that the oil cylinder stroke of the current sand box lifting and transferring vehicle is large and the rigidity is reduced, the utility model provides a sand box transferring vehicle, which shortens the oil cylinder stroke while keeping the lifting height unchanged.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is a sand box transfer vehicle, comprising a vehicle body and a sand box handling structure arranged on the vehicle body, wherein a fixed frame is provided on the vehicle body, the fixed frame is connected to a lifting frame via a lifting structure, and the sand box handling structure is arranged on the lifting frame; the lifting structure comprises a telescopic drive device, a gear is rotatably mounted on the lifting end of the telescopic drive device, a fixed rack is provided on the fixed frame, and a lifting rack is provided on the lifting frame, the gear is located between the fixed rack and the lifting rack and is engaged with both at the same time. In this solution, a double rack mechanism is designed to drive the gear therein to rise, and the gear rotates under the action of the fixed rack and further drives the lifting rack to rise, ultimately causing the lifting frame to obtain a displacement twice the extension of the telescopic drive device, thereby avoiding the reduction in rigidity caused by excessive extension of the telescopic drive device and improving the overall stability of the transfer vehicle.

[0007] Preferably, the fixed racks and the lifting racks are each provided in two sets, and a crossbar is provided at the lifting end of the telescopic drive device, with gears at both ends of the crossbar, which mesh with the two sets of fixed racks and the lifting racks respectively. Both sides of the lifting frame are driven, making the lifting process more stable.

[0008] Preferably, the telescopic drive device is a hydraulic cylinder.

[0009] Preferably, a plurality of first connecting blocks are installed on the fixing frame, the first connecting block has a first L-shaped surface, the inner angle of the first L-shaped surface is 90°, the fixed rack is installed on the first connecting block, and the bottom surface and one side surface of the fixed rack are abutted against the first L-shaped surface.

[0010] Preferably, the lifting frame is mounted with a plurality of second connecting blocks, each having a second L-shaped surface with an internal angle of 90°. The lifting rack is mounted on the second connecting blocks, with the bottom and one side of the lifting rack abutting against the second L-shaped surface. The connecting blocks serve as the base surface for rack installation, and the L-shaped surface is finely machined to improve installation accuracy.

[0011] Preferably, the fixed rack is fixedly connected to the plurality of first connection blocks by screws, and a first positioning pin is further provided between the fixed rack and at least one first connection block.

[0012] Preferably, the lifting rack is fixedly connected to the plurality of second connecting blocks by screws, and a second positioning pin is further provided between the lifting rack and at least one of the second connecting blocks. The positioning pin fixes the position of the rack to prevent loosening and improve transmission accuracy.

[0013] Preferably, the two ends of the crossbar are provided with bearing blocks, the two bearing blocks are connected to a gear shaft, and two gears are mounted on the two ends of the gear shaft. The two gears rotate synchronously, improving the balance of both sides, allowing the telescopic drive device to maintain vertical lifting and reducing the bending moment it is subjected to.

[0014] Preferably, baffles are provided at both ends of the gear shaft, the baffles being located on the side of the gear facing away from the seat bearing, and the baffles being pressed against the end face of the gear shaft by screws to prevent the gear from loosening.

[0015] Preferably, a guide mechanism is further provided between the fixing frame and the lifting frame.

[0016] It can be seen from the above technical solutions that the advantage of the present invention is that the present solution sets up a double-rack gear structure, so that the hydraulic cylinder drives the gear to rise and fall. When the gear rotates one division, the lifting rack rises by two teeth relative to the ground, cleverly realizing the double displacement of the lifting frame. On the one hand, while meeting the height requirements, the required elongation of the hydraulic cylinder is reduced, and the stiffness attenuation of the hydraulic cylinder is reduced. On the other hand, a larger lifting height can be obtained under the allowable performance of the hydraulic cylinder, which can increase the design height and density of the sand box cooling rack, increase the sand box capacity, and facilitate the expansion of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the lifting structure in the specific embodiment of the utility model. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of the lifting structure in the specific embodiment of the utility model. Figure 2 .

[0020] Figure 3 It is a structural schematic diagram of the end portion of the cross bar in a specific embodiment of the present utility model.

[0021] Description of main reference numerals

[0022] 1. Fixed frame, 2. Lifting frame, 3. Telescopic drive device, 4. Gear, 5. Fixed rack, 6. Lifting rack, 7. First connecting block, 8. Second connecting block, 9. Second locating pin, 10. Bearing with seat, 11. Baffle, 12. Cross bar. DETAILED DESCRIPTION

[0023] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0024] A sand box transfer vehicle includes a vehicle body, which is the walking part of the transfer vehicle. A fixed frame 1 is provided on the vehicle body. The fixed frame 1 is connected to a lifting frame 2 through a lifting structure. A sand box handling structure is provided on the lifting frame 2. The sand box handling structure is used to place the sand box into the sand box cooling rack. This is the existing structure of the sand box transfer vehicle.

[0025] In this program, if Figure 1-3 As shown, the lifting structure includes a telescopic drive device 3. In this embodiment, the telescopic drive device 3 is preferably a hydraulic cylinder. The fixed end of the telescopic drive device 3 (i.e., the cylinder body of the hydraulic cylinder) is set on the vehicle body. The telescopic drive device is vertically telescopic. The lifting end of the telescopic drive device 3 (i.e., the cylinder rod of the hydraulic cylinder) is rotatably installed with a gear 4. A fixed rack 5 is provided on the fixed frame 1, and a lifting rack 6 is provided on the lifting frame 2. The gear 4 is located between the fixed rack 5 and the lifting rack 6 and is engaged with both of them at the same time. Figure 1 The figure shows the state where the lifting frame is not raised. At this time, the lower end of the fixed rack 5 and the upper end of the lifting rack 6 are engaged with the gear 4. A guiding mechanism such as a slider guide rail is also provided between the fixed frame 1 and the lifting frame 2.

[0026] Furthermore, two groups of fixed racks 5 and lifting racks 6 are respectively provided, and a cross bar 12 is provided at the lifting end of the telescopic drive device. Both ends of the cross bar 12 are respectively provided with seat bearings 10, and the two seat bearings 10 are commonly connected to a gear shaft. Gears 4 are fixedly installed at both ends of the gear shaft. Baffles 11 are also provided at both ends of the gear shaft. The baffle 11 is located on the side of the gear 4 facing away from the seat bearings 10. The baffle 11 is pressed on the end face of the gear shaft by screws and adapted thereto. Two fixed racks 5 and lifting racks 6 are also respectively provided, and the gears 4 on both sides are respectively engaged with the two groups of fixed racks 5 and lifting racks 6 to form two groups of "rack-gear-rack" meshing structures.

[0027] The fixing frame 1 is provided with a plurality of first connecting blocks 7, each of which has a first L-shaped surface with an inner angle of 90°. The fixed rack 5 is provided on the first connecting block 7, with the bottom surface and one side surface of the fixed rack 5 being in contact with the first L-shaped surface. The fixed rack 5 is fixedly connected to the plurality of first connecting blocks 7 by screws, and a first positioning pin is further provided between the fixed rack 5 and at least one first connecting block 7. The lifting frame 2 is provided with a plurality of second connecting blocks 8, each of which has a second L-shaped surface with an inner angle of 90°. The bar 6 is installed on the second connecting block 8, and the bottom surface and one side surface of the lifting rack are abutted against the second L-shaped surface. The lifting rack 6 is fixedly connected to multiple second connecting blocks 8 by screws. A second positioning pin 9 is also provided between the lifting rack 6 and at least one second connecting block 8. In this embodiment, the connecting block is used as the installation basis of the rack, and only the L-shaped surface of the connecting block needs to be fine-machined as the reference surface, thereby reducing the surface processing requirements of the fixed frame and the lifting frame and reducing the production cost. At the same time, the use of screws and positioning pins to install the rack can improve the installation accuracy of the rack.

[0028] When the transfer vehicle is raised or lowered, taking the raising as an example, the telescopic drive device 3 drives the gear 4 to move upward, and the gear 4 rotates under the action of the fixed rack. When the gear rotates one index, the gear 5 rises by one tooth height relative to the fixed rack. At the same time, the gear is engaged with the lifting rack, and the lifting rack rises by one tooth height relative to the gear, that is, the lifting rack 4 rises by two teeth height relative to the fixed rack, that is, the lifting frame achieves a lifting amount twice the extension amount of the telescopic drive device 3; the descending process is the same.

[0029] It can be seen from the above embodiments that the beneficial effect of the present invention is that the present invention sets a double-rack gear structure, so that the hydraulic cylinder drives the gear to rise and fall. When the gear rotates one division, the lifting rack rises by two teeth relative to the ground, cleverly achieving double displacement of the lifting frame. On the one hand, while meeting the height requirements, the required elongation of the hydraulic cylinder is reduced, and the stiffness attenuation of the hydraulic cylinder is reduced. On the other hand, a larger lifting height can be obtained under the allowable performance of the hydraulic cylinder, which can increase the design height and density of the sand box cooling rack, increase the sand box capacity, and facilitate the expansion of production.

[0030] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flask transfer vehicle, comprising a vehicle body and a flask transport structure arranged on the vehicle body, characterized in that: A fixed frame is provided on the vehicle body, and the fixed frame is connected to a lifting frame through a lifting structure, and the sand box transporting structure is provided on the lifting frame; the lifting structure includes a telescopic driving device, and a gear is rotatably installed on the lifting end of the telescopic driving device, a fixed rack is provided on the fixed frame, and a lifting rack is provided on the lifting frame, and the gear is located between the fixed rack and the lifting rack and is engaged with both of them at the same time.

2. The flask transfer vehicle according to claim 1, characterized in that: There are two groups of fixed racks and lifting racks respectively. The lifting end of the telescopic drive device is provided with a cross bar, and both ends of the cross bar are provided with gears. The gears on both sides are respectively engaged with the two groups of fixed racks and lifting racks.

3. The flask transfer vehicle according to claim 1, characterized in that: The telescopic driving device is a hydraulic cylinder.

4. The flask transfer vehicle according to claim 1, characterized in that: A plurality of first connecting blocks are installed on the fixing frame, each of which has a first L-shaped surface with an inner angle of 90°. The fixed rack is installed on the first connecting block, and the bottom surface and one side surface of the fixed rack are in contact with the first L-shaped surface.

5. The flask transfer vehicle according to claim 1, characterized in that: The lifting frame is equipped with a plurality of second connecting blocks, each of which has a second L-shaped surface with an inner angle of 90°. The lifting rack is installed on the second connecting block, and the bottom surface and one side surface of the lifting rack are in contact with the second L-shaped surface.

6. The flask transfer vehicle according to claim 4, characterized in that: The fixed rack is fixedly connected to the plurality of first connection blocks via screws, and a first positioning pin is further provided between the fixed rack and at least one of the first connection blocks.

7. The flask transfer vehicle according to claim 5, characterized in that: The lifting rack is fixedly connected to a plurality of second connection blocks by screws, and a second positioning pin is further provided between the lifting rack and at least one second connection block.

8. The flask transfer vehicle according to claim 2, characterized in that: Both ends of the crossbar are provided with seat bearings respectively, the two seat bearings are commonly connected to a gear shaft, and two gears are respectively installed at both ends of the gear shaft.

9. The flask transfer vehicle according to claim 8, characterized in that: Baffles are respectively provided at both ends of the gear shaft. The baffles are located on the side of the gear facing away from the seat bearing, and the baffles are pressed against the end face of the gear shaft by screws.

10. The flask transfer vehicle according to claim 1, characterized in that: A guiding mechanism is further provided between the fixing frame and the lifting frame.

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