A eccentric block vibration type shakeout device

Abstract

The utility model relates to eccentric block excitation type shakeout technical field, concretely is an eccentric block excitation type shakeout device, including frame, shakeout platform, eccentric block excitation component, transmission component and damping support component, eccentric block excitation component produces centrifugal force through the rotation of symmetrical arrangement's sector eccentric block, and the excitation force is higher than traditional vibration motor, and can easily handle load sand box, solves the problem that high load shakeout is not thorough, adopts ordinary motor cooperation mechanical drive eccentric block, avoids vibration motor to bear vibration impact directly, and the service life of core component is prolonged, and through the replacement eccentric block of different quality or the adjustment counterweight hole counterweight, can flexibly adjust excitation force size, adapts the shakeout demand of different weight sand box, need not replace drive motor, and the helical spring of damping support component and guide column buffer vibration in coordination, reduce frame vibration transmission rate, improve the workshop working environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to eccentric block excitation type shakeout technology field, concretely is an eccentric block excitation type shakeout device. BACKGROUND

[0002] It is known that in the casting production, the shakeout machine is the key equipment for realizing the separation of the casting and the molding sand, and its performance directly affects the shakeout efficiency and the casting quality.

[0003] The traditional shakeout machine generally adopts the vibration motor as the driving source, and there are prominent problems of insufficient excitation force and short service life under high load conditions, the excitation force of the vibration motor is limited by its own structure, when processing the large load sand box, it is difficult to produce enough vibration intensity, leading to incomplete separation of the molding sand, and secondary processing is needed, at the same time, the internal bearing and winding of the vibration motor are easy to overheat and damage under the long-term operation of high frequency and high load, frequent replacement not only increases the maintenance cost, but also affects the production continuity, in the prior art, although the performance is tried to be improved by increasing the motor power, but the structure limitation of the vibration motor cannot be broken through, and it is difficult to meet the shakeout demand of high load and high frequency vibration in the casting industry. SUMMARY

[0004] In order to overcome the problem of insufficient excitation force of the existing shakeout device, the utility model provides an eccentric block excitation type shakeout device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an eccentric block excitation type shakeout device, comprising:

[0006] The rack is a frame structure and is horizontally placed on the ground;

[0007] The shakeout table is arranged above the rack and is used for bearing the sand box and realizing the separation of the casting and the molding sand;

[0008] The eccentric block excitation assembly is arranged below the shakeout table and is used for providing the vibration excitation force, and comprises a main shaft and at least two groups of eccentric blocks, the main shaft is horizontally arranged along the length direction of the shakeout table, and both ends are rotationally connected with the side wall of the shakeout table, the eccentric blocks are symmetrically fixed to both ends of the main shaft and are symmetrically distributed on both sides of the main shaft;

[0009] The transmission assembly is connected with the external driving motor and the eccentric block excitation assembly and is used for transmitting power; and

[0010] The damping support assembly is connected with the rack and the shakeout table, is uniformly distributed along the circumference of the shakeout table, and is used for buffering the vibration impact.

[0011] Preferably, the eccentric block vibration excitation assembly is a stepped shaft structure, both ends of which are rotatably connected to bearing seats of the shakeout table side wall through bearings, the bearing seats are welded and fixed to the shakeout table, and the axis is parallel to the length direction of the shakeout table.

[0012] Further, the eccentric block is a sector block, the side of the eccentric block body away from the main shaft is provided with a counterweight adjusting hole, the counterweight adjusting holes are uniformly distributed along the radial direction of the sector block, and two groups of eccentric blocks are arranged at intervals along the axial direction of the main shaft and are adapted to the width of the shakeout table.

[0013] Still further, the transmission assembly comprises a driving pulley, a driven pulley and a transmission member, the driven pulley is fixed to one end of the main shaft, the driving pulley is connected with the output shaft of the driving motor, the transmission member is sleeved outside the driving pulley and the driven pulley, the driving pulley and the driven pulley are both belt pulleys, the transmission member is a triangular belt, the driving pulley is connected with the output shaft of the driving motor through a key, and the driven pulley is connected with the end of the main shaft through a key.

[0014] Further, the damping support assembly comprises a damping spring and a guide column, one end of the guide column is fixed vertically to the top of the rack, the other end is inserted into a guide hole in the bottom of the shakeout table and is in gap cooperation with the hole wall, the damping spring is sleeved outside the guide column, and the two ends are respectively in abutment with the top surface of the rack and the bottom surface of the shakeout table.

[0015] On the basis of the foregoing scheme, the damping spring is a cylindrical spiral spring, the height of the damping spring in a natural state is greater than the length of the guide column, the diameter of the spring wire increases with the bearing weight of the shakeout table, and the spring stiffness is uniformly distributed along the length direction of the shakeout table.

[0016] On the basis of the foregoing scheme, further, the top surface of the shakeout table is provided with a sand box positioning structure, which comprises positioning baffle strips and lateral limiting plates distributed along the length direction, the positioning baffle strips are perpendicular to the length direction of the shakeout table, and the lateral limiting plates are arranged along the length direction of the shakeout table and are connected perpendicularly to the positioning baffle strips.

[0017] On the basis of the foregoing scheme, further, the bottom of the shakeout table is provided with a molding sand flow guide plate, the flow guide plate is inclined to the middle part of the rack, the inclination direction is perpendicular to the length direction of the shakeout table, the low end is provided with a sand discharge port, the middle part of the rack is provided with a material collecting groove corresponding to the sand discharge port, and the groove body is arranged obliquely to the ground. Beneficial effects

[0018] The eccentric block excitation type sand dropping device, the eccentric block excitation assembly generates centrifugal force through the rotation of the symmetrically arranged fan-shaped eccentric blocks, the excitation force is higher than that of the traditional vibration motor, heavy load sand boxes can be easily handled, the problem of incomplete sand dropping under high load is solved, a common motor is used in cooperation with mechanical transmission to drive the eccentric block, vibration impact is avoided to be directly borne by the vibration motor, the service life of the core components is prolonged, the excitation force size can be flexibly adjusted by replacing eccentric blocks with different masses or adjusting the counterweight holes, the sand dropping demand of sand boxes with different weights is adapted, the driving motor does not need to be replaced, the spiral spring of the damping support assembly and the guide column are used to buffer vibration, the rack vibration transmission rate is reduced, the workshop working environment is improved, all functions are realized through mechanical transmission and vibration, there is no complex electrical control element, and the dust and high temperature environment in the foundry workshop is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a side view structure schematic diagram of the utility model;

[0020] Figure 2 It is a structure schematic diagram of the damping support assembly of the utility model;

[0021] Figure 3 It is a structure schematic diagram of the sand box positioning structure of the utility model;

[0022] Figure 4 It is a structure schematic diagram of the eccentric block excitation assembly of the utility model;

[0023] Figure 5 It is a structure schematic diagram of the utility model Figure 4 It is a local enlarged structure schematic diagram of A in the utility model.

[0024] In the drawing: 1, rack; 2, sand dropping table; 3, eccentric block excitation assembly; 4, main shaft; 5, eccentric block; 6, transmission assembly; 7, damping support assembly; 8, bearing; 9, bearing seat; 10, adjusting hole; 11, driving wheel; 12, driven wheel; 13, transmission piece; 14, damping spring; 15, guide column; 16, sand box positioning structure; 17, positioning baffle; 18, limiting plate; 19, guide plate; 20, sand discharge port; 21, material collecting groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Reference Figures 1-5The application discloses an eccentric block 5 excitation type shakeout device, and realizes efficient separation of a casting and molding sand in casting production through the cooperative design of "eccentric block 5 centrifugal excitation + damping buffer support + molding sand directional flow guiding", and the core scheme is as follows: the rack 1 is used as a basic bearing frame, supports the shakeout table 2 and various functional components, the shakeout table 2 bears the sand box, the centrifugal force generated by the eccentric block excitation component 3 is used for realizing vibration shakeout, the transmission component 6 is used for transmitting external motor power to the excitation component, so that the motor is prevented from directly bearing vibration impact, the damping support component 7 is used for buffering the impact of vibration on the rack 1, environmental vibration is reduced, the molding sand flow guiding structure is used for collecting and separating the separated molding sand, and various components are closely cooperated through welding, bearing 8 connection, spring cooperation and the like, the problems of insufficient excitation force and short service life of a traditional vibration motor are solved, and the application is suitable for shakeout operation of various sand boxes in a foundry workshop, and is especially suitable for complete shakeout requirements of high-load sand boxes.

[0027] Firstly, referring to Figure 1 In the embodiment, the rack 1 is a rectangular frame structure, is welded by using Q235 steel, is horizontally placed on the ground, and is provided with screw thread connecting leveling foot pads (metal material, top rubber coating) at four corners of the bottom, the rotating foot pads can adjust the horizontal degree of the rack 1, the shakeout table 2 is prevented from being inclined due to uneven ground, guide columns 15 of the damping support component 7 are fixed on the rack 1 at the top along the circumference of the shakeout table 2, a material collecting groove 21 (welded by steel plate) is arranged along the width direction at the middle of the rack 1, the groove body is inclined to the ground, and the molding sand is conveniently discharged to a specified direction, motor supports are welded on the side surface of the rack 1, and are used for fixing external driving motors, so that the power transmission of the transmission component 6 is accurate.

[0028] The rack 1 is designed with overall rigidity, can bear the total weight of the shakeout table 2, the sand box and the molding sand, has no obvious deformation during operation, and provides a reliable basis for stable vibration of the excitation component and directional flow guiding of the molding sand.

[0029] Then, referring to Figure 3 In the embodiment, the shakeout table 2 is a rectangular steel plate structure (the surface is subjected to wear-resistant treatment), is horizontally arranged above the rack 1, is a core working surface for bearing the sand box and realizing shakeout, the sand box positioning component is welded on the top surface of the shakeout table 2, and the sand box positioning component comprises a positioning baffle 17 and a lateral limiting plate 18; the positioning baffle 17 is perpendicular to the length direction of the shakeout table 2, is distributed along the length direction at intervals, and is used for limiting the displacement of the sand box along the length direction; and the lateral limiting plate 18 is arranged along the length direction of the shakeout table 2, is connected with the positioning baffle 17 perpendicularly, forms a "cross-shaped" limiting, and ensures that the sand box does not deviate and does not slide off during the vibration shakeout process.

[0030] The bottom of the shakeout table 2 is welded with a sand guide plate 19 (bent from steel plate), which is inclined to the middle of the frame 1, and the inclination direction is perpendicular to the length direction of the shakeout table 2. The low end of the sand guide plate 19 is provided with a sand discharge port 20 (rectangular opening), which is opposite to the material collecting groove 21 in the middle of the frame 1. The separated sand can slide along the sand guide plate 19, enter the material collecting groove 21 through the sand discharge port 20, and avoid scattering to the outside of the frame 1, thereby reducing the cleaning workload.

[0031] The two side walls of the shakeout table 2 are welded with bearing seats 9 (cast iron material), which are used to install the main shaft 4 of the eccentric block excitation assembly 3. The axis of the bearing seat 9 is parallel to the length direction of the shakeout table 2, which ensures that the main shaft 4 drives the shakeout table 2 to vibrate stably in the vertical direction when rotating.

[0032] Secondly, referring to Figure 4 In this embodiment, the eccentric block excitation assembly 3 is arranged below the shakeout table 2, which is the core of generating vibration shakeout force. The main shaft 4 is a stepped shaft structure (45 steel quenching and tempering treatment, surface chromium plating anti-rust), and the two ends are rotatably connected with the bearing seats 9 on the side walls of the shakeout table 2 through deep groove ball bearings 8. The outer ring of the bearing 8 is interference fit with the bearing seat 9, and the inner ring is transition fit with the main shaft 4, which ensures smooth rotation of the main shaft 4 without jamming. The middle part of the main shaft 4 is a smooth shaft section, and the two ends are shaft shoulders for installing eccentric blocks 5, which limit the axial displacement of the eccentric blocks 5.

[0033] The eccentric blocks 5 are fan-shaped blocks (cast iron material, high density and wear-resistant), which are symmetrically fixed on the two ends of the main shaft 4 and are spaced along the axial direction of the main shaft 4. The spacing is adapted to the width of the shakeout table 2, which ensures that the excitation force is uniformly distributed along the width direction of the shakeout table 2. The side of the eccentric block 5 away from the main shaft 4 is provided with a counterweight adjusting hole 10, which is uniformly distributed along the radial direction of the fan-shaped block. The overall weight of the eccentric block 5 can be adjusted by adding counterweight blocks, thereby changing the excitation force and adapting to the shakeout requirements of sandboxes of different weights.

[0034] When the main shaft 4 rotates under the drive of the transmission assembly 6, the symmetrically arranged eccentric blocks 5 rotate synchronously with the main shaft 4. Due to the eccentricity of the center of gravity of the eccentric block 5 from the axis of the main shaft 4, a centrifugal force (excitation force) in the vertical direction is generated, which drives the shakeout table 2 to vibrate up and down. During the vibration process, the casting and sand in the sand box move relatively due to inertia, the sand falls off from the surface of the casting, and the separation is realized.

[0035] Thirdly, referring to Figure 5 In this embodiment, the transmission assembly 6 connects the external drive motor and the eccentric block excitation assembly 3, which is responsible for power transmission and avoids the motor directly bearing the vibration impact. The driving wheel 11 is a belt pulley structure (cast iron material), which is fixed with the output shaft of the external drive motor through a key connection. The driven wheel 12 is also a belt pulley, which is fixed with one end of the main shaft 4 of the eccentric block excitation assembly 3 through a key connection. The wheel grooves of the driving wheel 11 and the driven wheel 12 are adapted to ensure that the transmission member 13 is in close contact without slipping.

[0036] The transmission member 13 adopts a triangular belt (rubber material, with a built-in fiber reinforced layer), which is sleeved outside the driving wheel 11 and the driven wheel 12, and transmits power by the friction between the belt and the wheel groove. The belt transmission has a certain elasticity, which can buffer the impact during starting and braking, avoid the damage of the motor caused by the rigid connection between the motor and the main shaft 4, and prolong the service life of the motor.

[0037] After the external driving motor is started, the driving wheel 11 is driven to rotate, the driven wheel 12 is driven to rotate by the triangular belt, the driven wheel 12 rotates synchronously with the main shaft 4, and the eccentric block 5 is driven to rotate to generate a vibration excitation force, so as to realize the power transmission of “motor-transmission assembly 6-vibration excitation assembly-sand shakeout table 2”. The motor does not directly contact the vibration components in the whole process, and the operation is more stable.

[0038] In addition, referring to Figure 2 In this embodiment, the damping support assembly 7 connects the rack 1 and the sand shakeout table 2, is uniformly distributed along the circumference of the sand shakeout table 2, is used for buffering the impact of vibration on the rack 1, reduces the environmental vibration of the workshop, the guide column 15 is a cylindrical metal rod, one end is vertically welded and fixed with the top of the rack 1, the other end is inserted into the guide hole in the bottom of the sand shakeout table 2 (the guide hole and the guide column 15 are gap matched), limits the horizontal displacement of the sand shakeout table 2, ensures that the sand shakeout table 2 only vibrates in the vertical direction, and avoids the horizontal deviation caused by the sand box sliding.

[0039] The damping spring 14 is a cylindrical spiral spring (spring steel material, excellent fatigue resistance), which is sleeved outside the guide column 15, and the two ends are respectively abutted with the top surface of the rack 1 and the bottom surface of the sand shakeout table 2. The height of the spring in the natural state is greater than the length of the guide column 15, and it is in a pre-compressed state after assembly. It can not only provide elastic support for the sand shakeout table 2, but also absorb impact energy during vibration, reduce the transmission of vibration to the rack 1 and the ground, and improve the working environment of the workshop.

[0040] When the sand shakeout table 2 vibrates, the damping spring 14 expands and contracts with the vibration, buffers the impact through elastic deformation, and the guide column 15 ensures the accuracy of the vibration direction of the sand shakeout table 2, avoids the horizontal shaking caused by vibration, and cooperates to realize the balance of “stable vibration + low impact transmission”, which not only ensures the sand shakeout effect, but also reduces the influence on the surrounding equipment.

[0041] In addition, referring to Figure 1 In this embodiment, the main shaft 4 of the eccentric block vibration excitation assembly 3 drives the eccentric block 5 to rotate, the centrifugal force generated by the rotation drives the sand shakeout table 2 to vibrate up and down, the positioning structure on the top surface of the sand shakeout table 2 fixes the sand box, ensures that the sand box vibrates synchronously with the sand shakeout table 2, and the castings and the sand are separated due to inertia. The separated sand slides along the surface of the sand shakeout table 2 to the bottom deflector 19.

[0042] The transmission assembly 6 transmits the motor power to the main shaft 4 through the belt drive, avoiding the motor directly bearing the vibration impact, prolonging the service life of the motor, and the shock support assembly 7 buffers the impact of the shakeout table 2 vibration on the rack 1, reduces the vibration interference of the ground and the surrounding environment, and forms a complete link of "power transmission-vibration shakeout-impact buffering".

[0043] The guide plate 19 at the bottom of the shakeout table 2 guides the sand to the middle sand discharge port 20, and the sand falls into the material collecting groove 21 in the middle of the rack 1 through the sand discharge port 20. The inclined design of the groove body makes the sand directional discharge, which is convenient for subsequent recycling and avoids the workshop mess caused by sand scattering.

[0044] In addition, referring to Figure 1 In this embodiment, the eccentric block 5 generates excitation by centrifugal force, which significantly improves the excitation strength compared with traditional vibration motors, and can realize complete shakeout of high-load sand boxes. The weight of the eccentric block 5 is adjusted through the counterweight adjustment hole 10, so that different weight sand boxes can be adapted without replacing the driving motor, which has strong adaptability. The transmission assembly 6 isolates the motor from the vibration components to avoid the motor directly bearing the impact, solves the problem of easy damage of the bearings 8 and windings of the traditional vibration motor, and the eccentric block 5 and the main shaft 4 are made of wear-resistant material, which has no obvious wear after long-term operation and small vibration impact. The spring and guide column 15 of the shock support assembly 7 cooperatively buffer, which greatly reduces the transmission of vibration to the rack 1 and the ground, improves the workshop working environment, reduces the influence on the surrounding equipment, the sand is collected conveniently, the directional design of the guide plate 19 and the material collecting groove 21 avoids sand scattering, reduces the workshop cleaning workload, and facilitates sand recycling and reuse.

[0045] In addition, referring to Figure 1 In this embodiment, the medium sand box suitable for automobile parts, mechanical parts and the like can realize rapid separation of sand by adjusting the weight of the eccentric block 5, avoid secondary shakeout, and shakeout of high-load sand boxes. For high-load sand boxes with thick wall thickness and large sand usage, the eccentric block 5 has sufficient excitation force to ensure that the sand is completely separated from the complex structure of the casting, improve the shakeout efficiency, and continuously shakeout in batches. Adapt to the continuous production rhythm of the foundry workshop, the equipment has no frequent failures, and can be stably operated for a long time. Cooperate with the directional recycling of sand to reduce the risk of production interruption.

[0046] Finally, referring to Figure 1 In this embodiment, the eccentric block 5 is made of nodular cast iron material, which has higher density and stronger impact resistance, is suitable for long-term high-frequency vibration working conditions, reduces the risk of cracking of the eccentric block 5, the shock spring 14 is made of alloy spring steel material, the fatigue resistance is improved, the spring replacement cycle is prolonged, the top surface of the shakeout table 2 is paved with wear-resistant ceramic lining plate, the surface wear resistance is enhanced, the surface wear caused by long-term sand box friction is avoided, and it is suitable for batch high-frequency shakeout scenes.

[0047] Working principle:

[0048] The eccentric block 5 excitation type shakeout device, in use, first rotates the bottom leveling foot pad of the rack 1, aligns the rack 1 with the shakeout table 2 horizontally through the level, checks whether the rotation of the main shaft 4 of the eccentric block excitation assembly 3 is smooth, whether the bearing 8 has an abnormal sound, confirms that the tension of the triangular belt of the transmission assembly 6 is moderate, without slackness or tightness, and cleans the residual sand in the top surface of the shakeout table 2 and the flow guide plate 19 and the material collecting groove 21.

[0049] The sand box to be shaken out is placed on the top surface of the shakeout table 2, the edges of the sand box are attached to the positioning baffle 17 and the lateral limiting plate 18, the sand box is ensured not to deviate during the vibration process, the weight of the sand box is adjusted by adding or removing the counterweight block through the counterweight adjusting hole 10 of the eccentric block 5, the excitation force is adjusted, and the shakeout requirement of the current sand box is adapted.

[0050] The external drive motor is started, the motor drives the driving wheel 11 of the transmission assembly 6 to rotate, the driven wheel 12 and the main shaft 4 are synchronously rotated through the triangular belt, the eccentric block 5 at both ends of the main shaft 4 rotates with the shaft, a centrifugal force in the vertical direction is generated, and the shakeout table 2 is vibrated up and down.

[0051] When the shakeout table 2 vibrates, the casting and the sand in the sand box produce relative motion due to inertia, the sand falls off from the surface of the casting, slides to the bottom flow guide plate 19 on the top surface of the shakeout table 2, is guided by the flow guide plate 19 to the middle sand discharge port 20, falls into the material collecting groove 21 of the rack 1 through the sand discharge port 20, and is discharged to the designated recycling area along the inclined groove body.

[0052] The sand separation in the sand box is observed, after the sand is basically shaken off and no residual sand is left, the drive motor is turned off, the main shaft 4 and the eccentric block 5 gradually stop rotating, the shakeout table 2 returns to be stable, the casting after shakeout is taken out from the shakeout table 2, is transferred to the next process, the residual sand in the flow guide plate 19 and the material collecting groove 21 is cleaned, and the next shakeout operation is prepared.

[0053] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An eccentric block (5) excitation-type sand removal device, characterized in that, include: The frame (1) is a frame structure and is placed horizontally on the ground; The sand removal platform (2) is located above the frame (1) and is used to support the sand box and separate the casting from the molding sand. Eccentric block excitation assembly (3), the eccentric block excitation assembly (3) is located below the sand drop table (2) and is used to provide vibration excitation force. It includes a main shaft (4) and at least two sets of eccentric blocks (5). The main shaft (4) is horizontally arranged along the length direction of the sand drop table (2) and its two ends are rotatably connected to the side wall of the sand drop table (2). The eccentric blocks (5) are symmetrically fixed at both ends of the main shaft (4) and symmetrically distributed on both sides of the main shaft (4). Transmission assembly (6), which connects an external drive motor and an eccentric block excitation assembly (3) for transmitting power; and The shock-absorbing support assembly (7) connects the frame (1) and the sand drop platform (2) and is evenly distributed along the circumference of the sand drop platform (2) to buffer vibration impact.

2. The eccentric block (5) excitation-type sand removal device according to claim 1, characterized in that, The main shaft (4) of the eccentric block excitation assembly (3) is a stepped shaft structure. Both ends are rotatably connected to the bearing seats (9) on the side wall of the sand drop table (2) through bearings (8). The bearing seats (9) are welded and fixed to the sand drop table (2), and the axis is parallel to the length direction of the sand drop table (2).

3. The eccentric block (5) excitation-type sand removal device according to claim 2, characterized in that, The eccentric block (5) is a fan-shaped block. The side of the eccentric block (5) away from the main shaft (4) is provided with a counterweight adjustment hole (10). The counterweight adjustment hole (10) is evenly distributed along the radial direction of the fan-shaped block. The two sets of eccentric blocks (5) are spaced apart along the axial direction of the main shaft (4), and the spacing is adapted to the width of the sand drop table (2).

4. The eccentric block (5) excitation-type sand removal device according to claim 3, characterized in that, The transmission assembly (6) includes a drive wheel (11), a driven wheel (12) and a transmission component (13). The driven wheel (12) is fixed to one end of the main shaft (4). The drive wheel (11) is connected to the output shaft of the drive motor. The transmission component (13) is sleeved on the outside of the drive wheel (11) and the driven wheel (12). The drive wheel (11) and the driven wheel (12) are both pulleys. The transmission component (13) is a V-belt. The drive wheel (11) is connected to the output shaft of the drive motor by a key. The driven wheel (12) is connected to the end of the main shaft (4) by a key.

5. The eccentric block (5) excitation-type sand removal device according to claim 4, characterized in that, The shock-absorbing support assembly (7) includes a shock-absorbing spring (14) and a guide column (15). One end of the guide column (15) is vertically fixed to the top of the frame (1), and the other end is inserted into the guide hole at the bottom of the sand drop table (2) and is fitted with the hole wall with a clearance. The shock-absorbing spring (14) is sleeved on the outside of the guide column (15), and both ends abut against the top surface of the frame (1) and the bottom surface of the sand drop table (2) respectively.

6. The eccentric block (5) excitation-type sand removal device according to claim 5, characterized in that, The shock-absorbing spring (14) is a cylindrical helical spring. In its natural state, its height is greater than the length of the guide column (15). The diameter of the spring wire increases with the weight borne by the sand drop platform (2), and the spring stiffness is evenly distributed along the length of the sand drop platform (2).

7. The eccentric block (5) excitation-type sand removal device according to claim 6, characterized in that, The top surface of the sand drop platform (2) is provided with a sand box positioning structure (16), including a positioning baffle (17) and a side limiting plate (18) distributed along the length direction. The positioning baffle (17) is perpendicular to the length direction of the sand drop platform (2), and the side limiting plate (18) is set along the length direction of the sand drop platform (2) and is perpendicularly connected to the positioning baffle (17).

8. The eccentric block (5) excitation-type sand removal device according to claim 7, characterized in that, The bottom of the sand drop platform (2) is provided with a molding sand guide plate (19). The guide plate (19) is inclined towards the middle of the frame (1). The inclination direction is perpendicular to the length direction of the sand drop platform (2). The bottom end is provided with a sand discharge port (20). The middle part of the frame (1) is provided with a material collection trough (21) corresponding to the sand discharge port (20). The trough is inclined to the ground.

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