Lifting in-out mechanism of high-load low-pressure holding furnace

Abstract

The utility model relates to the technical field of equipment for low-pressure holding furnaces, in particular to a lifting in-out mechanism for a high-load low-pressure holding furnace. The utility model discloses a high-load low-pressure holding furnace lifting in-out mechanism which comprises a chassis and a frame body arranged on the chassis, driving wheels are arranged at the four corners of the lower end of the chassis, a lifting lead screw assembly is arranged at the position, right opposite to the driving wheels, of the chassis, the power output end of the lifting lead screw assembly can be pushed out vertically upwards, and the power output end of the lifting lead screw assembly can be pushed out vertically upwards. The power output ends of the lifting lead screw assemblies upwards penetrate through the frame body, jacking plates used for supporting the furnace bottom are jointly fixed to the power output ends of the two lifting lead screw assemblies located on the same side, and a synchronous transmission assembly used for controlling the power output ends of the lifting lead screw assemblies to synchronously ascend and descend is arranged on the frame body. The utility model has the advantages that the supporting force can be ensured to be in the absolute vertical direction so as to improve the loading effect and the stability of the mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for low-pressure heat preservation furnaces, specifically a lifting and lowering mechanism for a high-load low-pressure heat preservation furnace. Background Technology

[0002] The low-pressure holding furnace is an important component of the low-pressure casting machine. It is usually necessary to seal the molten aluminum in the quantitative holding furnace. During operation, the molten aluminum in the quantitative holding furnace is injected into the mold on the worktable through the riser pipe by air pressure.

[0003] However, in practical applications, many problems exist. In order to ensure that the riser pipe is accurately aligned with the mold's pouring port, the holding furnace usually needs to be moved to a designated position and height. When the existing lifting and lowering mechanism lifts the holding furnace to the designated height, it usually uses an upper support plate to support the holding furnace for lifting. Due to the large actual weight of the holding furnace, and the misalignment between the actual position of the lifting component used to lift the holding furnace and the support position, the upper support plate and the lifting and lowering mechanism are prone to deformation, resulting in poor performance. Utility Model Content

[0004] The purpose of this invention is to provide a high-load, low-pressure heat preservation furnace lifting and lowering mechanism that ensures the supporting force is in the absolute vertical direction by aligning the lifting component of the lifting and lowering mechanism with the actual support position of the lifting and lowering mechanism.

[0005] To achieve the above objectives, this utility model discloses a lifting and lowering mechanism for a high-load, low-pressure heat preservation furnace, comprising a chassis and a frame mounted on the chassis. Drive wheels are located at the four corners of the lower end of the chassis. A lifting screw assembly is located on the chassis directly opposite the drive wheels. The power output end of the lifting screw assembly can be pushed vertically upwards. The power output end of the lifting screw assembly passes upwards through the frame. A lifting plate for supporting the furnace bottom is fixed to the power output ends of two lifting screw assemblies located on the same side. A synchronous transmission assembly is provided on the frame for controlling the synchronous lifting and lowering of the power output ends of the lifting screw assemblies.

[0006] When it is necessary to lift the insulation furnace, the synchronous transmission component is activated. The synchronous transmission component causes the lifting screw assembly to lift upward synchronously, and lifts the entire insulation furnace through the lifting plate. At this time, the weight of the insulation furnace acts on the lifting plate, and the lifting plate provides support for the insulation furnace through the drive wheel and the lifting screw assembly.

[0007] This invention, by setting a lifting plate to support the furnace bottom, ensures that the power output end of the lifting screw assembly is aligned with the actual position of the drive wheel, and that the support position of the lifting screw assembly coincides with the support position of the chassis. This guarantees that the supporting force is in an absolutely vertical direction, avoiding the problem in the prior art where the actual position of the lifting assembly is misaligned with the support position, leading to deformation of the upper lifting plate, lifting and lowering mechanism, and chassis after prolonged use. This invention has the advantage of ensuring that the supporting force is in an absolutely vertical direction, thereby improving the load-bearing capacity and stability of the mechanism.

[0008] Preferably, a guide assembly passing through the frame is provided between the chassis and the lifting plate. Two lifting screw assemblies located on the same side of the guide assembly are separated from each other by one end along the length direction of the lifting plate. The guide assembly includes a fixed column supported between the chassis and the frame and a sliding column that can slide within the fixed column.

[0009] By setting fixed columns and sliding columns that can slide within the fixed columns, the lifting path of the lifting plate is limited, ensuring that the movement trajectory of the lifting plate is in an absolutely vertical direction, thereby ensuring the load-bearing capacity of the lifting plate and the chassis.

[0010] Preferably, each set of lifting screw assemblies corresponds to two sets of guide assemblies, and the two sets of guide assemblies are symmetrically arranged on both sides of the lifting screw assembly along the length direction of the lifting plate.

[0011] Compared to setting a guide component only on one side of the lifting screw assembly, this method avoids the lifting plate being subjected to force at both ends along its length, which would cause the lifting plate to deform due to the reaction force during the lifting process.

[0012] Preferably, the lifting screw assembly is fitted with an outer cover that supports the chassis and the frame.

[0013] By adding an outer cover, the support between the chassis and the frame is further increased, and the pressure on the chassis is reduced, thereby protecting the chassis and preventing it from being dented by pressure.

[0014] Preferably, the outer cover is a square tube structure, and the axial direction of the outer cover is parallel to the axial direction of the lifting screw assembly.

[0015] By setting the cross-section of the outer cover to be square, the outer cover can increase the cross-sectional area compared to a circular cross-section, thereby further reducing the pressure it bears and protecting the chassis.

[0016] Preferably, the outer cover of the lifting screw assembly and the bottom ends of the two sets of guide components corresponding to the lifting screw assembly are provided with a gasket, and the gasket is directly opposite the drive wheel at the lower end of the chassis.

[0017] Compared to the method where the bottom of the outer casing and the fixed column press directly onto the chassis, this method can reduce the pressure on the chassis and use pads for cushioning, protecting the stability and durability of the overall structure of the device, thereby increasing the overall load capacity of the device.

[0018] Preferably, the synchronous transmission assembly includes two first transmission shafts parallel to the lifting plate and a second transmission shaft connected between the two first transmission shafts. One of the first transmission shafts is poweredly connected to the power assembly, and the two first transmission shafts are poweredly connected to the second transmission shaft through a right-angle steering gear. A worm gear transmission module is provided between the two first transmission shafts and the lifting screw assembly.

[0019] The power assembly and the lifting screw assembly are connected by two first drive shafts, and the power connection between the two first drive shafts is achieved by a second drive shaft spanning between the two first drive shafts and a right-angle steering gear, thereby enabling the four lifting screw assemblies located at the four corners of the chassis to start synchronously.

[0020] This invention can ensure that the supporting force is in an absolutely vertical direction, which has the advantage of improving the load-bearing capacity and stability of the mechanism. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0022] Figure 2 This is a top view of the structure of this utility model.

[0023] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0024] In the diagram: 11. Chassis; 12. Frame; 13. Drive wheel; 14. Lifting screw assembly; 141. Threaded rod; 142. Screw; 15. Lifting plate; 16. Guide assembly; 161. Fixed column; 162. Sliding column; 17. First drive shaft; 18. Second drive shaft; 19. Power assembly; 20. Right-angle steering gear; 21. Worm gear transmission module; 22. Outer cover; 23. Gasket. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0026] Depend on Figure 1As shown, this embodiment discloses a lifting and lowering mechanism for a high-load, low-pressure heat preservation furnace, including a chassis 11 and a frame 12 mounted on the chassis 11. Drive wheels 13 are located at the four corners of the lower end of the chassis 11. A lifting screw assembly 14, with its power output end capable of vertically pushing upwards, is located on the chassis 11 directly opposite the drive wheels 13. Figure 3 As shown, the lifting screw assembly 14 includes a threaded rod 141 that is nested with each other and can rotate relative to the frame 12, and a screw 142 that can be raised and lowered by threads. The outer surface of the screw 142 is threadedly connected to the inner surface of the threaded rod 141. The frame 12 is provided with a synchronous transmission assembly for controlling the synchronous raising and lowering of the power output end of the lifting screw assembly 14. The synchronous transmission assembly includes two first transmission shafts 17 parallel to the lifting plate 15 and a second transmission shaft 18 connected between the two first transmission shafts 17. One of the first transmission shafts 17 is connected to the power assembly 19. The two first drive shafts 17 and the second drive shaft 18 are connected by a right-angle steering gear 20. The power component 19 is any existing power component used to drive the right-angle steering gear 20 that can simultaneously connect the first drive shafts 17 and the second drive shafts 18. A worm gear transmission module 21 is provided between the two first drive shafts 17 and the lifting screw assembly 14. The worm gear transmission module 21 includes a worm wheel sleeved on the threaded rod 141 and worms on the two first drive shafts 17 that mesh with the worm wheel on the first drive shaft 17.

[0027] Depend on Figure 2 As shown, two lead screws 142 pass upward through the frame 12 and are fixed together on the same side to a lifting plate 15 for supporting the furnace bottom. The lifting plate 15 has a rectangular thin plate structure. A guide assembly 16 passes through the frame 12 between the chassis 11 and the lifting plate 15. The two lifting lead screw assemblies 14 on the same side of the guide assembly 16 are located away from each other at one end along the length of the lifting plate 15. Figure 3 As shown, the guide assembly 16 includes a fixed column 161 supported between the chassis 11 and the frame 12 and a sliding column 162 that can slide within the fixed column 161. Each set of lifting screw assemblies 14 corresponds to two sets of guide assemblies 16. The two sets of guide assemblies 16 are symmetrically arranged on both sides of the lifting screw assembly 14 along the length of the lifting plate 15, thereby avoiding the lifting plate 15 from being subjected to force at both ends in the same way as the spreader pole in the length direction, which would cause the lifting plate 15 to deform due to the reaction force during the lifting process.

[0028] An outer cover 22 is fitted around the lifting screw assembly 14 and supported between the chassis 11 and the frame 12. The outer cover 22 has a square tube structure and its axis is parallel to that of the lifting screw assembly 14. The outer cover 22 and the two sets of guide components 16 corresponding to the lifting screw assembly 14 are provided with a gasket 23 at their bottom ends. The gasket 23 is directly opposite the drive wheel 13 at the lower end of the chassis 11, so that the support position of the screw 142 coincides with the support position of the chassis 11, ensuring that the support force is in an absolutely vertical direction, avoiding deformation of the device due to misalignment of the support force, and improving the load effect and stability of the device.

[0029] When the holding furnace needs to be lifted, the power assembly 19 is activated, transmitting power to the right-angle steering gear 20. The right-angle steering gear 20 then transmits power to the first drive shaft 17 and the second drive shaft 18, respectively. The second drive shaft 18 then transmits power to the other first drive shaft 17. The two first drive shafts 17 drive the worm wheel on the threaded rod 141 to rotate via a worm gear, thereby causing the threaded rod 141 to rotate relative to the lead screw 142. The threaded rod 141 drives the lead screw 142 to move upward through its internal thread. The lead screw 142 causes the lifting plate 15 to lift the bottom of the holding furnace upward, and drives the sliding column 162 in the fixed column 161 to rise synchronously, thus lifting the holding furnace. The weight of the holding furnace is applied to the pad 23 through the lifting plate 15 and along the lead screw 142 and threaded rod 141, and is supported by the chassis 11 and the drive wheel 13 directly opposite the pad 23, ensuring that the support force is in an absolutely vertical direction, thereby improving the load performance of the device.

Claims

1. A high load low pressure holding furnace lifting mechanism, comprising a chassis and a frame body arranged on the chassis, and drive wheels arranged at the four corners of the lower end of the chassis, characterized in that: The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom.

2. The high load low pressure holding furnace lifting in and out mechanism according to claim 1, characterized in that: The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies.

3. A high load low pressure holding furnace lifting in-out mechanism according to claim 2, characterized in that: The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom.

4. The high load low pressure holding furnace lifting in and out mechanism according to claim 3, characterized in that: The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies.

5. A high load low pressure holding furnace lifting in-out mechanism according to claim 4, characterized in that: The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom.

6. A high load low pressure holding furnace lifting in-out mechanism according to claim 5, characterized in that: The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies.

7. A high load low pressure holding furnace lifting in-out mechanism according to any one of claims 1-6, characterized in that: The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom. The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies. The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom. The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies. The lifting screw assembly is provided with a power output end capable of being pushed vertically upward, the power output end of the lifting screw assembly passes through the frame body upward, and the power output ends of the two lifting screw assemblies on the same side are jointly fixed with a jacking plate for supporting the furnace bottom. The frame body is provided with a synchronous transmission assembly for controlling the synchronous lifting of the power output ends of the lifting screw assemblies.

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