Double-push rod linkage quick discharge mechanism of high-efficiency rotor sand mixer

Abstract

The utility model provides a kind of double push rod linkage quick unloading mechanism of high-efficiency rotor sand mixer, belong to sand mixer equipment technical field, this double push rod linkage quick unloading mechanism of high-efficiency rotor sand mixer includes unloading shell, double push rod subassembly, linkage transmission subassembly and unloading gate, the bottom of unloading shell is equipped with unloading port, the unloading gate is movably arranged in unloading port position and is used to block or open unloading port, the double push rod subassembly includes two push rods, two push rods are respectively arranged in the side of unloading shell, the end of each push rod is connected with linkage transmission subassembly, the other end is connected with unloading gate, the linkage transmission subassembly is arranged above unloading shell and is connected with double push rod subassembly transmission torque, the linkage transmission subassembly includes connecting rod mechanism and driving part, two ends of the connecting rod mechanism are respectively hinged with two push rods, the utility model can solve the technical problem that existing rotor sand mixer exists poor sealing performance in the process of unloading, leading to material leakage.

Description

Technical Field

[0001] This utility model belongs to the technical field of sand mixer equipment, specifically, it relates to a double push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer. Background Technology

[0002] Rotary sand mixers are key equipment in the foundry industry for mixing sand and additives. They are widely used in the molding sand preparation process in foundry workshops. After the sand mixing operation is completed, the uniformly mixed sand needs to be quickly discharged for subsequent molding. Traditional rotary sand mixers mostly use manual opening of the discharge gate or single push rod driven discharge gate for unloading. The manual opening method is labor-intensive and slow, which is difficult to meet the cycle time requirements of modern foundry production lines. Although the single push rod drive method achieves mechanized operation, the driving force only acts on one side of the discharge gate, which makes the gate prone to tilting during the opening process, causing uneven wear between the edge of the discharge port and the gate. Damage to the sealing performance of the rotor sand mixer can lead to sand leakage after prolonged use. Some sand mixers use a motor-driven screw to push the gate, but the screw transmission speed is slow and sand and dust can easily accumulate, causing transmission jamming, which affects unloading efficiency and equipment reliability. Existing unloading mechanisms also have shortcomings in sealing structure. Simple planar contact seals are difficult to adapt to the wear and deformation of the gate and shell during use, resulting in a gradual decrease in sealing effect, increasing equipment maintenance workload and dust pollution in the production environment. Therefore, it is necessary to develop an unloading mechanism that can achieve rapid unloading, synchronized operation, reliable sealing, and simple structure to improve the overall performance and service life of the rotor sand mixer. Utility Model Content

[0003] In view of this, the present invention provides a double push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer, which can solve the technical problems of poor sealing performance leading to material leakage and asynchronous operation of the unloading mechanism causing gate jamming in the existing rotor sand mixer during the unloading process.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a double-pushrod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer, including an unloading shell, a double-pushrod assembly, a linkage transmission assembly, and an unloading gate. The bottom of the unloading shell has an unloading port. The unloading gate is movably disposed at the unloading port and is used to block or open the unloading port. The double-pushrod assembly includes two pushrods, which are respectively disposed on one side of the unloading shell. One end of each pushrod is connected to the linkage transmission assembly, and the other end is connected to the unloading gate. The linkage transmission assembly is disposed above the unloading shell and transmits torque to the double-pushrod assembly. The linkage transmission assembly includes a linkage mechanism and a driving component. The two ends of the linkage mechanism are respectively hinged to the two pushrods. The driving component is disposed at the geometric center of the linkage mechanism and applies a downward thrust. When the driving component is activated, the linkage mechanism drives the two pushrods to expand outward synchronously. The two pushrods pull the unloading gate downward through the hinge point to open the unloading port. The hinge point between the pushrods and the unloading gate is located at the upper surface edge of the unloading gate.

[0006] The technical advantages of the double-pushrod linkage rapid unloading mechanism of the high-efficiency rotor sand mixer provided by this utility model are as follows: By setting a movable unloading gate at the bottom of the unloading housing and adopting a cooperative structure of double-pushrod assembly and linkage transmission assembly, the rapid opening and closing function of the unloading port is realized. When the drive unit is started, the linkage mechanism of the linkage transmission assembly synchronously transmits the torque to the two pushrods. The two pushrods expand outward at the same time and pull the unloading gate to move in parallel, so that the unloading port opens quickly. This double-pushrod synchronous linkage structure ensures that the unloading gate is subjected to uniform force, avoids the gate tilting or jamming caused by unilateral force, and improves the reliability and response speed of the unloading action. At the same time, the hinge point between the pushrod and the unloading gate is set at the upper edge of the gate, so that the point of application of the tension is close to the edge of the gate, reducing the risk of gate deformation and ensuring a smooth and efficient unloading process.

[0007] Based on the above technical solution, the double push rod linkage rapid unloading mechanism of the high-efficiency rotor sand mixer of this utility model can be further improved as follows:

[0008] The linkage mechanism has a V-shaped structure, with a drive component connection hole at the apex of the V-shaped structure and push rod hinge holes at the ends of the two inclined sides.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The linkage mechanism adopts a V-shaped structure design, which allows the downward thrust applied by the driving component to be converted into two component forces in the direction of the inclined side through the geometric characteristics of the V-shaped structure. These two component forces act on the two push rods respectively, realizing the torque conversion from a single driving source to bidirectional output. The driving component connection hole is set at the apex of the V-shaped structure to ensure that the driving force acts on the symmetrical center line of the linkage mechanism, so that the push rods on both sides obtain driving forces of equal magnitude and symmetrical direction, ensuring the synchronization and consistency of the two push rods. The push rod hinge hole at the end of the two inclined side is reasonably designed, which can convert the angle change of the linkage mechanism into the linear motion of the push rod, improving the transmission efficiency and motion accuracy of the mechanism.

[0010] Furthermore, the push rod is straight, with a rectangular cross-section, and its stiffness along the length direction is greater than its stiffness along the width direction.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The push rod adopts a straight rod structure and the cross-section is designed as a rectangle. This shape design makes the push rod have sufficient rigidity in the length direction to withstand tensile and compressive loads, while maintaining appropriate flexibility in the width direction to adapt to small deviations during installation and movement. The characteristic that the stiffness of the push rod in the length direction is greater than that in the width direction ensures that the push rod mainly deforms in the length direction when under force, avoiding transmission failure caused by lateral bending. The rectangular cross-section also facilitates the hinged connection of the push rod with other components, providing a stable contact surface and installation reference, and improving the overall load-bearing capacity and service life of the push rod.

[0012] Furthermore, the unloading gate has a rectangular plate structure, with the length dimension of the unloading gate being greater than the length dimension of the unloading port, and the width dimension of the unloading gate being greater than the width dimension of the unloading port.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The discharge gate is designed as a rectangular plate structure, and its length and width dimensions are both larger than the corresponding dimensions of the discharge port. This dimensional relationship ensures that the discharge gate can completely cover the discharge port when closed, forming a reliable sealing effect and preventing leakage of materials inside the sand mixer when not discharging. The gate size being larger than the discharge port also provides sufficient overlap area for the sealing structure. Even if the gate or the edge of the discharge port wears down after long-term use, it can still maintain good sealing performance. At the same time, the rectangular plate structure has the advantages of simple manufacturing and uniform strength, which facilitates processing and installation, reducing manufacturing costs and maintenance difficulties.

[0014] Furthermore, a sealing boss is provided on the lower surface of the unloading gate. The sealing boss has a ring structure and is arranged around the edge of the unloading gate. The height of the sealing boss is 2~5mm.

[0015] The beneficial effects of the above-mentioned improvement scheme are as follows: An annular sealing boss is provided on the lower surface of the unloading gate. The boss is arranged around the edge of the gate and has a height of 2-5mm. When the unloading gate is in the closed position, the sealing boss and the edge of the unloading port of the unloading housing form a line contact seal. This sealing structure can effectively prevent fine particulate materials from leaking from the gap between the gate and the housing, improving the sealing reliability of the unloading mechanism. The annular structure ensures that the sealing boss forms a continuous sealing line around the gate, eliminating sealing dead angles. The height of the sealing boss is designed within the range of 2-5mm, which can ensure sufficient sealing compression to adapt to surface unevenness, and avoid excessive friction when the gate is opened due to excessive height, thus achieving a balance between sealing effect and opening flexibility.

[0016] Furthermore, the hinge axis at the joint between the push rod and the unloading gate is perpendicular to the length direction of the push rod, and the axis of the hinge axis is parallel to the upper surface of the unloading gate.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The hinge axis at the joint between the push rod and the unloading gate is designed to be perpendicular to the length of the push rod and parallel to the upper surface of the unloading gate. This hinge axis configuration allows the push rod to swing in a plane perpendicular to the gate surface, realizing the effective conversion of the push rod tension to the gate's downward tension. When the push rod expands outward, the hinge axis allows the relative angle between the push rod and the gate to change, avoiding stress concentration and structural interference that may occur with rigid connections. The design of the hinge axis being parallel to the gate surface also ensures that the tension applied to the gate by the two push rods is symmetrically distributed in the gate plane, preventing the gate from twisting or tilting during opening, ensuring the smoothness and consistency of the unloading port opening action, and improving the motion reliability of the entire unloading mechanism.

[0018] Furthermore, the distance from the hinge point of the linkage mechanism and the push rod to the connection hole of the drive component is less than the straight-line distance between the hinge point of the linkage mechanism and the push rod.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the distance from the hinge point of the linkage mechanism and the push rod to the connection hole of the drive component is designed to be less than the straight-line distance between the two hinge points. This dimensional relationship forms a lever amplification mechanism. The small stroke applied by the drive component can be converted into a larger displacement of the push rod through the geometric amplification effect of the linkage mechanism, thereby enabling the unloading gate to obtain a sufficient opening distance. This design reduces the stroke requirement of the drive component, allows the use of standard drive devices with smaller strokes, reduces equipment costs and installation space requirements. At the same time, the torque amplification characteristic of the lever mechanism enables the drive component to achieve reliable control of the unloading gate with a smaller driving force, improves the transmission efficiency and response sensitivity of the mechanism, and optimizes the overall power performance and economy of the unloading mechanism.

[0020] Furthermore, the driving component is a motor, and the end of the connecting rod of the driving component is provided with a ball joint, which is inserted into the connecting hole of the linkage mechanism and fixed by a pin.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the ball joint is inserted into the connecting hole of the linkage mechanism and fixed by the pin. This ball joint connection method allows a certain degree of angular freedom between the driving component and the linkage mechanism, which compensates for installation errors and angular deviations during the movement process, avoids stress concentration and motion interference that may be caused by rigid connection, and the ball joint structure also facilitates the installation and disassembly of the driving component, simplifies the maintenance of the equipment, and improves the maintainability and service life of the unloading mechanism.

[0022] Furthermore, the unloading shell is welded from carbon steel plate, and the inner wall surface of the unloading shell is provided with a wear-resistant coating with a thickness of 1~3mm.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The unloading shell is formed by welding carbon steel plates. Carbon steel has good strength and toughness and can withstand the impact load and vibration during the operation of the sand mixer. The welding process makes the shell structure strong in integrity and high in rigidity. A wear-resistant coating with a thickness of 1~3mm is set on the inner wall surface of the unloading shell. This coating can effectively resist the wear and erosion of the inner wall of the shell by sand and extend the service life of the shell. The thickness of the wear-resistant coating is designed to be within the range of 1~3mm, which not only ensures sufficient wear resistance, but also avoids the increase in shell weight and manufacturing cost due to excessively thick coating. The combination of carbon steel material and wear-resistant coating achieves an optimized match between structural strength and surface durability, improving the comprehensive performance and economy of the unloading shell.

[0024] Furthermore, the push rod is made of alloy steel, and its surface is chrome-plated with a thickness of 0.02~0.05mm. The unloading gate is made of stainless steel, and the sealing boss is made of wear-resistant rubber.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The push rod is made of alloy steel and chrome-plated. Alloy steel has high strength and good fatigue resistance, and can withstand the alternating load generated by long-term reciprocating motion. The thickness of the chrome plating layer is controlled at 0.02~0.05mm. The chrome plating layer has the characteristics of high hardness and low friction coefficient, which can reduce friction and wear between the push rod and other components and improve the smoothness of movement. The unloading gate is made of stainless steel plate. Stainless steel has excellent corrosion resistance and can resist the erosion of moisture and chemicals that may be contained in the sand. The sealing boss is made of wear-resistant rubber. The elasticity of rubber allows the sealing boss to deform appropriately when it comes into contact with the edge of the unloading port, forming a good sealing effect. At the same time, wear-resistant rubber has high wear resistance and anti-aging properties. This multi-material combination design gives full play to the performance advantages of various materials, realizing high strength and low friction of the push rod, corrosion resistance of the gate, and reliable sealing of the sealing components, thus improving the overall working performance and service life of the unloading mechanism.

[0026] Compared with existing technologies, the beneficial effects of the dual-pushrod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer provided by this utility model are as follows: This utility model solves the problems of slow unloading speed and uneven force on the gate in existing technologies by designing a dual-pushrod linkage rapid unloading mechanism and adopting a dual-pushrod synchronous drive method. The V-shaped linkage mechanism in the linkage transmission component converts the thrust of a single drive source into a symmetrical bidirectional output, ensuring that the two pushrods move synchronously, so that the unloading gate maintains a balanced state during opening and closing, avoiding the gate tilting and jamming caused by unilateral drive. The pushrods and the gate are connected by a hinge, allowing for angle adjustment during movement, thus improving efficiency. The mechanism boasts excellent adaptability and reliability. The annular sealing boss on the lower surface of the discharge gate forms an effective seal with the discharge port, preventing material leakage during non-discharge operations and improving the cleanliness of the sand mixer's working environment. The wear-resistant coating on the inner wall of the discharge housing and the chrome plating on the push rod significantly enhance the wear resistance and service life of key components, reducing maintenance frequency and replacement costs. The entire mechanism is compact, operates rapidly, and is reliably sealed. Compared to traditional discharge devices, this invention can shorten discharge time, improve production efficiency, and simultaneously improve the stability and consistency of the discharge process, reducing equipment failure rates and providing reliable technical support for the efficient and stable operation of the sand mixer. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A front view of a double-push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer;

[0029] Figure 2 A cross-sectional view of a double-push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer;

[0030] Figure 3 A side view of a double push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer;

[0031] Figure 4 A top view of a double-push rod linkage rapid unloading mechanism for a high-efficiency rotor sand mixer;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 10. Unloading housing; 20. Double push rod assembly; 30. Linkage transmission assembly; 31. Linkage mechanism; 32. Drive component; 40. Unloading gate; 50. Unloading port. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figure 1-4 The image shows an embodiment of a high-efficiency rotor sand mixer with a double-pushrod linkage rapid unloading mechanism provided by this utility model. In this embodiment, it includes an unloading housing 10, a double-pushrod assembly 20, a linkage transmission assembly 30, and an unloading gate 40. The bottom of the unloading housing has an unloading port 50. The unloading gate is movably positioned at the unloading port and is used to block or open the unloading port. The double-pushrod assembly includes two pushrods, each disposed on one side of the unloading housing. One end of each pushrod is connected to the linkage transmission assembly, and the other end is connected to... The discharge gate is connected to a linkage transmission assembly located above the discharge housing and transmitting torque to the double push rod assembly. The linkage transmission assembly includes a linkage mechanism and a drive component. The two ends of the linkage mechanism are respectively hinged to two push rods. The drive component is located at the geometric center of the linkage mechanism and applies downward thrust. When the drive component is activated, the linkage mechanism drives the two push rods to expand outward synchronously. The two push rods pull the discharge gate downward through the hinge point to open the discharge port. The hinge point between the push rod and the discharge gate is located at the upper surface edge of the discharge gate.

[0036] L-shaped baffles are installed on both sides of the discharge port, and the L-shaped baffles are adapted to the discharge gate.

[0037] In the above technical solution, the linkage mechanism has a V-shaped structure. The apex of the V-shaped structure is provided with a connection hole for the drive component, and the ends of the two inclined sides are respectively provided with push rod hinge holes.

[0038] Furthermore, in the above technical solution, the push rod is straight, the cross-section of the push rod is rectangular, and the stiffness of the push rod along the length direction is greater than the stiffness along the width direction.

[0039] Furthermore, in the above technical solution, the unloading gate has a rectangular plate structure, the length dimension of the unloading gate is greater than the length dimension of the unloading port, and the width dimension of the unloading gate is greater than the width dimension of the unloading port.

[0040] Furthermore, in the above technical solution, a sealing boss is provided on the lower surface of the unloading gate. The sealing boss has a ring structure and is arranged around the edge of the unloading gate. The height of the sealing boss is 2~5mm.

[0041] Furthermore, in the above technical solution, the hinge axis at the hinge point between the push rod and the unloading gate is perpendicular to the length direction of the push rod, and the axis of the hinge axis is parallel to the upper surface of the unloading gate.

[0042] Furthermore, in the above technical solution, the distance from the hinge point of the linkage mechanism and the push rod to the connection hole of the drive component is less than the straight-line distance between the hinge point of the linkage mechanism and the push rod.

[0043] Furthermore, in the above technical solution, the driving component is a motor, and the end of the connecting rod of the driving component is provided with a ball joint. The ball joint is inserted into the connecting hole of the linkage mechanism and fixed by a pin.

[0044] Furthermore, in the above technical solution, the unloading shell is welded from carbon steel plate, and the inner wall surface of the unloading shell is provided with a wear-resistant coating with a thickness of 1~3mm.

[0045] Furthermore, in the above technical solution, the push rod is made of alloy steel, the surface of the push rod is chrome-plated, the thickness of the chrome plating layer is 0.02~0.05mm, the unloading gate is made of stainless steel plate, and the sealing boss is made of wear-resistant rubber.

[0046] After the sand mixing operation is completed, the operator starts the unloading program through the control panel. The drive unit operates, transmitting thrust to the apex position of the V-shaped linkage mechanism via a ball joint. Under the action of the thrust, the linkage mechanism changes angle, and the two inclined sides drive the push rods hinged to them to expand outward. The outward expansion of the push rods pulls the unloading gate plate to move parallel through the hinge point. When the gate plate moves to the predetermined position, the unloading port is fully opened, and the mixed sand flows out quickly from the unloading port under its own weight. After unloading is completed, the operator starts the drive unit again, the linkage mechanism returns to its initial angle, the push rod drives the gate plate to pull back, and moves the unloading gate plate until it closes. After the gate is closed and the discharge port is fully closed, the annular sealing boss on the lower surface fits against the edge of the discharge port to form a seal, preventing sand leakage. In daily use, operators should regularly check the lubrication status of the push rod and hinge point to ensure smooth and flexible movement of the moving parts, check the wear of the sealing boss, and replace the seals if necessary. Check the working pressure and action response time of the drive components to ensure the speed and reliability of the discharge action. For equipment used frequently, it is recommended to conduct a comprehensive inspection and lubrication maintenance of the discharge mechanism once a month and to conduct a sealing performance test of the drive components once a quarter to ensure that the entire discharge system is in good working condition.

[0047] The following is a specific embodiment 1 of this utility model: The high-efficiency rotor sand mixer with double push rod linkage and rapid unloading mechanism in this embodiment is applied to a rotor sand mixer with a batch capacity of 500~800kg. The unloading shell is made of 8mm thick Q235 carbon steel plate welded by argon arc welding. After welding, the weld is ground to ensure a smooth surface. The unloading shell has an inverted conical structure with an upper diameter of 1200mm, a lower diameter (unloading port) of 600mm, and a height of 800mm. A 2mm thick polyurethane wear-resistant coating is sprayed on the inner wall surface of the unloading shell. This coating has a hardness of Shore A90 and has excellent wear resistance and impact resistance. The push rods in the double push rod assembly are made of 4mm thick steel. Made of 0Cr alloy steel, the push rod achieves a hardness of HRC35~40 after quenching and tempering. It is a straight rod, 450mm long, with a rectangular cross-section; the long side is 30mm and the short side is 20mm. The push rod surface is hard-plated with chrome, with a plating thickness of 0.03mm and a surface roughness Ra value of less than 0.4um. Two push rods are symmetrically arranged on both sides of the unloading housing, with a center distance of 700mm. One end of the push rod is connected to the linkage mechanism via a 16mm diameter hinge shaft, and the other end is connected to the unloading gate via a 14mm diameter hinge shaft. The hinge shafts are made of 45# steel and have undergone quenching treatment. The linkage mechanism consists of two 380mm long connecting rods connected in a V-shape by hinges. The V-shaped apex angle is 60°, and a connecting seat is welded at the apex. A 20mm diameter connecting hole is formed on the connecting seat for installing a ball joint of the drive component. The drive component is a pneumatic push rod with a stroke of 100mm and a thrust of 5000N. An 18mm diameter ball joint is installed at the end of the piston rod of the pneumatic push rod. The ball joint is inserted into the connecting hole of the connecting seat and locked by a 12mm diameter pin. The discharge gate is made of 10mm thick 304 stainless steel plate. The gate is rectangular, 700mm long and 700mm wide, with 20mm rounded corners. A rectangular wear-resistant rubber strip with a cross-section of 8mm x 4mm is bonded to the lower surface of the gate, 30mm from the edge. A continuous annular sealing boss is formed by a rubber strip surrounding the gate. The rubber material is nitrile rubber with a Shore A70 hardness, which has good oil resistance and wear resistance. Two hinge seats, each 25mm high, are symmetrically welded to the upper surface of the gate at a distance of 50mm from the long edge. These seats are used for hinged connection with the push rod. Driven by the pneumatic push rod, the entire unloading mechanism takes 2-3 seconds to go from fully closed to fully open. The opening height of the unloading port reaches 150mm, which can meet the requirement of rapid sand flow. After unloading, the pneumatic push rod returns, and the unloading gate falls back under its own weight and is fully closed with the assistance of the gate return spring. The sealing contact pressure formed between the sealing boss and the edge of the unloading port is 0.2-0.With a pressure of 4 MPa, sand leakage is effectively prevented. The unloading mechanism in this embodiment has a compact structure, is easy to install and maintain, and all moving parts exhibit excellent wear resistance after surface treatment. It can operate stably in continuous production environments, significantly improving the production efficiency and reliability of the sand mixer.

[0048] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, with improvements and optimizations to the linkage mechanism. The two connecting rods of the V-shaped linkage mechanism are designed as adjustable-length structures. Each connecting rod consists of an inner rod and an outer rod. One end of the inner rod is inserted into the outer rod to form a telescopic structure. Threads are machined on both the outer surface of the inner rod and the inner surface of the outer rod. The length of the connecting rod is adjusted and locked by rotating the locking sleeve. The adjustable length range is 350~410mm, with an adjustment interval of 10mm. This adjustable length design makes the unloading machine… The structure can adapt to different specifications of sand mixers and discharge port sizes. By adjusting the length of the connecting rod, the stroke of the push rod and the opening height of the discharge gate can be changed to meet the requirements of different material flowability for the discharge port opening. At the same time, the adjustable structure also facilitates precise alignment of the mechanism during the equipment installation and commissioning stage, ensuring that the synchronization of the two push rods reaches the optimal state. A self-lubricating bearing is added at the hinge point of the connecting rod mechanism. The bearing is made of oil-impregnated copper bushing material, which reduces friction and wear at the hinge point, reduces the frequency of maintenance, and improves the smoothness of the mechanism's movement and service life.

[0049] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and improves the sealing structure of the unloading gate. A double-layer sealing structure is provided on the lower surface of the unloading gate. The first layer of sealing is an annular sealing boss located 30mm from the edge of the gate. This boss is made of nitrile rubber with a hardness of Shore A70 and a cross-sectional size of 8mm x 4mm. The second layer of sealing is an inner ring sealing boss located 15mm from the edge of the gate. This boss is made of silicone rubber with a hardness of Shore A60 and a cross-sectional size of 6mm x 3mm. An annular sealing cavity is formed between the two layers of sealing bosses. The double-layer sealing structure can achieve the first layer When the seal wears or ages, the second layer of seal continues to function, significantly improving the reliability and service life of the seal. At the same time, reinforcing ribs are added to the upper surface of the unloading gate around its perimeter. The reinforcing ribs are 15mm high and 6mm thick, and are fixed by welding using the same 304 stainless steel material as the gate. The reinforcing ribs are arranged in a grid pattern around the gate, dividing the gate into nine rectangular areas. This reinforcing rib structure greatly improves the bending stiffness of the gate, preventing deformation when the gate is subjected to the pull force of the push rod and the pressure of the material. It also ensures uniform contact between the sealing boss and the edge of the unloading port, further improving the sealing effect and the overall performance of the unloading mechanism.

[0050] Specifically, the principle of this utility model is as follows: Symmetrical driving and rapid response of the unloading gate are achieved through a double-push-rod linkage mechanism. When the driving component applies a downward thrust, the V-shaped structure of the linkage mechanism decomposes the vertically downward driving force into two components along the hypotenuse. These two components are transmitted to the two push rods through the hinge point. Due to the symmetry of the V-shaped linkage mechanism, the driving forces obtained by the two push rods are equal in magnitude and symmetrical in direction, ensuring synchronous action of the double push rods. Under the action of the driving force, the push rods expand outward, and through the hinged connection with the unloading gate, the horizontal expansion motion is converted into a vertical downward pulling force of the gate, causing the unloading gate to overcome its own weight and sealing friction to move parallel and open the unloading port. The symmetrical force application of the double push rods ensures that the unloading gate is subjected to uniform force throughout the opening process, avoiding torque imbalance caused by unilateral driving and preventing... This design prevents gate tilting and jamming. The geometric relationship between the distance from the hinge point of the linkage mechanism and the push rod to the connection hole of the drive component is less than the distance between the two hinge points, creating a lever amplification effect. This allows the small stroke of the drive component to be converted into a large displacement of the push rod, thus enabling the unloading gate to open fully. The hinged connection allows for a certain degree of angular freedom between components, compensating for manufacturing and installation errors and improving the smoothness of the mechanism's movement. The annular sealing boss on the lower surface of the unloading gate forms a line contact seal with the edge of the unloading port when the gate is closed. The sealing boss is made of elastic material and can deform appropriately under contact pressure, filling the tiny gaps in the contact surface and forming an effective sealing barrier. Through reasonable structural design and the application of mechanical principles, the entire mechanism achieves the comprehensive functions of rapid unloading, synchronous drive, and reliable sealing.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-efficiency rotor sand mixer with a double-pushrod linkage rapid unloading mechanism, comprising an unloading shell, a double-pushrod assembly, a linkage transmission assembly, and an unloading gate, wherein the bottom of the unloading shell has an unloading port, the unloading gate is movably disposed at the unloading port and used to block or open the unloading port, the double-pushrod assembly includes two pushrods, each pushrod is disposed on one side of the unloading shell, one end of each pushrod is connected to the linkage transmission assembly, and the other end is connected to the unloading gate, the linkage transmission assembly is disposed above the unloading shell and transmits torque to the double-pushrod assembly, characterized in that, The linkage transmission assembly includes a linkage mechanism and a driving component. The two ends of the linkage mechanism are respectively hinged to two push rods. The driving component is located at the geometric center of the linkage mechanism and applies a downward thrust. When the driving component is activated, the linkage mechanism drives the two push rods to expand outward synchronously. The two push rods pull the unloading gate downward through the hinge point to open the unloading port. The hinge point between the push rod and the unloading gate is located at the upper surface edge of the unloading gate.

2. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 1, characterized in that, The linkage mechanism has a V-shaped structure. The apex of the V-shaped structure is provided with a connection hole for the drive component, and the ends of the two inclined sides are respectively provided with push rod hinge holes.

3. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 2, characterized in that, The push rod is straight with a rectangular cross-section, and its stiffness along its length is greater than its stiffness along its width.

4. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 3, characterized in that, The unloading gate has a rectangular plate structure. The length dimension of the unloading gate is greater than the length dimension of the unloading port, and the width dimension of the unloading gate is greater than the width dimension of the unloading port.

5. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 4, characterized in that, The lower surface of the unloading gate is provided with a sealing boss. The sealing boss has a ring structure and is arranged around the edge of the unloading gate. The height of the sealing boss is 2~5mm.

6. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 5, characterized in that, The hinge axis at the joint between the push rod and the unloading gate is perpendicular to the length direction of the push rod, and the axis of the hinge axis is parallel to the upper surface of the unloading gate.

7. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 6, characterized in that, The distance from the hinge point of the linkage mechanism and the push rod to the connection hole of the drive component is less than the straight-line distance between the hinge point of the linkage mechanism and the push rod.

8. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 7, characterized in that, The driving component is a motor, and the end of the connecting rod of the driving component is provided with a ball joint. The ball joint is inserted into the connecting hole of the linkage mechanism and fixed by a pin.

9. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 8, characterized in that, The unloading shell is welded from carbon steel plate, and the inner wall surface of the unloading shell is provided with a wear-resistant coating with a thickness of 1~3mm.

10. The double-push-rod linkage rapid unloading mechanism of a high-efficiency rotor sand mixer according to claim 9, characterized in that, The push rod is made of alloy steel, and its surface is chrome-plated with a thickness of 0.02~0.05mm. The unloading gate is made of stainless steel, and the sealing boss is made of wear-resistant rubber.

Images