Device for removing sand core in aluminum alloy box type casting

Abstract

The invention discloses a device for removing a sand core in an aluminum alloy box type casting, and relates to the technical field of casting production, the device for removing the sand core in the aluminum alloy box type casting comprises a lifting rack and further comprises a casting placing frame which is slidably installed in the lifting rack, and a tray and a hollow rotating rod are installed in the casting placing frame; and the hollow rotating rod is horizontally and slidably installed at the top of the lifting rack, an abutting crushing claw piece is elastically inserted into the bottom of the hollow rotating rod, the hollow rotating rod is sleeved with an abutting piece and a driving mechanism in a threaded mode, the abutting piece is matched with the abutting crushing claw piece in an abutting mode, the top of the driving mechanism is in transmission connection with the hollow rotating rod, and the bottom of the driving mechanism abuts against the tray intermittently. The driving mechanism is arranged to drive the hollow rotating rod to rotate and drive the tray to ascend and descend in a reciprocating mode, so that the tray drives the casting to move up and down, and the abutting crushing claw pieces are switched back and forth in the state that the abutting crushing claw pieces are unfolded to make contact with and crush a sand core and the state that the abutting crushing claw pieces are folded to move and avoid damage to the surface of the casting. And the sand core can be effectively removed under multiple times of collision and extrusion.

Description

Technical Field

[0001] The invention relates to the technical field of casting production, in particular to a device for removing sand cores inside an aluminum alloy box-type casting. Background Art

[0002] In the manufacturing process of aluminum alloy box-type castings, sand core molds are usually used for molding. This mold consists of a sand core and a sand mold. The sand core is mainly used to form the inner cavity or complex shape part of the casting. As an important molding material, the sand core is widely used in the casting process. However, the sand core needs to be completely removed after the casting is formed to ensure the internal quality of the casting and the smooth progress of subsequent processing.

[0003] The patent publication number of the existing patent application is: CN217912805U, and the publication date is November 29, 2022. The name of the patent is "A casting core shaking sand machine", which includes a box, the top of the box is fixedly connected with a cover plate, the vertical outer wall of the box is fixedly connected with a plurality of support rods, and the inner wall of the box is connected with a high-frequency vibration mechanism; the high-frequency vibration mechanism includes a guide cylinder fixedly connected to the bottom of the box, a sliding rod is movably sleeved in the guide cylinder, the upper end of the sliding rod is fixedly connected with a mesh plate, and the upper side of the mesh plate is evenly fixedly connected with a plurality of placement racks, the vertical side walls on the left and right sides of the box are fixedly connected with two fixed plates, and the same guide rod is fixedly connected between the two fixed plates, and the side walls on the left and right sides of the mesh plate are fixedly connected with sliding blocks, and sliding holes are opened on the two sliding blocks, and the guide rod passes through the sliding block through the sliding hole. The utility model effectively improves the vibration amplitude and frequency of the core shaking sand machine, and effectively improves the cleaning effect and cleaning efficiency of the core shaking sand machine.

[0004] The above applications have shortcomings. Although using simple mechanical devices to remove sand cores can improve efficiency, these devices often lack flexibility and adaptability and are difficult to handle castings of different shapes and sizes. At the same time, these devices are prone to damage the surface of the casting when removing the sand core, affecting the appearance quality of the casting. Summary of the invention

[0005] The purpose of the present invention is to provide a device for removing the internal sand core of an aluminum alloy box-type casting to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A device for removing sand cores inside an aluminum alloy box-type casting comprises a lifting frame and a casting placement frame which is slidably installed inside the lifting frame, a tray is installed inside the casting placement frame, and a hollow rotating rod is horizontally slidably installed on the top of the lifting frame, a contact crushing claw piece is elastically inserted at the bottom of the hollow rotating rod, and a pressing piece that abuts and cooperates with the contact crushing claw piece is externally threadedly sleeved on the hollow rotating rod, and a driving mechanism, the top of which is transmission-connected to the hollow rotating rod, and the bottom of which intermittently abuts against the tray, and the driving mechanism drives the hollow rotating rod to rotate while driving the tray to lift and lower reciprocate, so that the casting on the tray abuts against the contact crushing claw piece, so that the contact crushing claw piece is switched back and forth between the expanded and retracted states.

[0008] Preferably, guide grooves are provided on both sides of the casting placement rack, limiting rods inserted into the guide grooves are fixedly connected to both sides of the tray, and clamping plates are elastically connected to both sides of the top of the tray.

[0009] Preferably, a crossbeam is installed in the lifting frame, a connecting sleeve is connected to the outer surface of the hollow rotating rod, the connecting sleeve is slidably connected to the crossbeam, and a locking piece is installed between the connecting sleeve, the crossbeam and the hollow rotating rod.

[0010] Preferably, the abutting crushing claw member includes an insertion rod plugged into the hollow rotating rod, a top spring is installed between the top of the insertion rod and the hollow rotating rod, a hemispherical end cover is fixedly connected to the bottom of the insertion rod, a plurality of connecting claws distributed in a ring are elastically hinged on the edge of the hemispherical end cover, and a pendulum is installed at one end of the connecting claw.

[0011] Preferably, the pressing member comprises a threaded sleeve threadedly sleeved on the outside of the hollow rotating rod, an annular boss is fixedly connected to the bottom of the threaded sleeve, and a limiting groove matching the connecting claw is formed on the outer side of the annular boss.

[0012] Preferably, the driving mechanism includes a pair of transmission shafts rotatably mounted on both sides of the inner wall of the lifting frame, one of the transmission shafts is equipped with a driving motor, a transmission belt is installed between the two transmission shafts, and a driven gear ring meshing with the transmission belt is fixedly sleeved on the outer side of the hollow rotating rod.

[0013] Preferably, an oblique groove is provided at one end of the limit rod, and a cam abutting against the oblique groove is fixedly connected to the bottom of the transmission shaft.

[0014] Preferably, the locking member includes a hollow connecting plate fixed to the back side of the connecting sleeve, the bottom surface of the hollow connecting plate contacts the top of the cross beam, a pressure rod is inserted into the hollow connecting plate for friction transmission with the hollow rotating rod, an elastic pressure plate is vertically inserted through the hollow connecting plate, and one side of the elastic pressure plate is obliquely abutted against one end of the pressure rod.

[0015] Preferably, a support plate is vertically fixedly connected to the lifting frame, a connecting frame is inserted in the support plate, a cross bar is fixedly connected to the bottom of the connecting frame, a support block for lifting the cross bar is fixedly connected to the back of the casting placement frame, a brake push rod is fixedly connected to the top of the connecting frame, and an anti-slip pad is fixedly connected to the bottom of the elastic pressure plate, and the anti-slip pad is located above the brake push rod.

[0016] Preferably, a water pump is installed on the top of the hollow rotating rod, a drainage outlet corresponding to the connecting claw is installed on the top of the hemispherical end cover, and a water guide groove is opened on the inner side of the connecting claw.

[0017] In the above technical scheme, a driving mechanism is set to drive the hollow rotating rod to rotate and the tray to lift and lower back and forth, so that the tray moves up and down with the casting, and intermittently squeezes the abutting and crushing claw parts in the rotating state, forcing the abutting and crushing claw parts to automatically expand when moving toward the pressure part, so that the abutting and crushing claw parts switch back and forth between the state of expanding to contact and crush the sand core and the state of contracting to facilitate movement and avoid damaging the surface of the casting. The up and down movement of the casting cooperates with the rotating abutting and crushing claw parts, so that the sand core is effectively removed under multiple collisions and extrusions, thereby achieving efficient and non-destructive removal of the sand core inside the aluminum alloy box-type casting, and the removal is more thorough. At the same time, the pressure part can be twisted to adjust the expansion range of the abutting and crushing claw parts according to castings of different shapes and sizes, and because the abutting and crushing claw parts are elastic, the abutting and crushing claw parts can be prevented from causing a hard impact on the inner wall of the casting, thereby avoiding damage to the casting during the knocking process.

[0018] By rationally designing the abutting and crushing claws and the driving mechanism, damage to the casting surface during the sand core removal process is avoided, and the interior of the casting is protected.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0023] Figure 2 It is a rear view of a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0024] Figure 3 It is a structural schematic diagram of a casting placement rack and a tray in a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0025] Figure 4 It is a structural schematic diagram of a tray in a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0026] Figure 5 It is a transmission schematic diagram of a transmission mechanism in a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0027] Figure 6 It is a schematic diagram of the connection between the hollow rotating rod and the abutting crushing claw member in a device for removing the internal sand core of an aluminum alloy box-type casting according to the present invention;

[0028] Figure 7 It is a side sectional view of a hollow rotating rod in a device for removing sand cores inside an aluminum alloy box-type casting according to the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged view of point A.

[0030] Description of reference numerals:

[0031] 1. Lifting frame; 11. Crossbeam; 2. Casting rack; 21. Guide groove; 22. Support block; 23. Movable groove; 3. Tray; 31. Limit rod; 311. Inclined groove; 32. Clamp; 4. Hollow rotating rod; 41. Connecting sleeve; 5. Claw member for contacting the crushing claw; 51. Inserting rod; 52. Top spring; 53. Hemispherical end cover; 531. Drainage outlet; 54. Connecting claw; 541. Water guide groove; 55. Pendulum; 56. Torsion spring; 6. Pressing member; 61. Screw Sleeve; 62, annular boss; 63, limit groove; 7, driving mechanism; 71, transmission shaft; 72, driving motor; 73, transmission belt; 74, driven gear ring; 75, cam; 8, locking member; 81, hollow connecting plate; 82, pressure rod; 83, elastic pressure plate; 84, anti-slip pad; 85, screw; 86, locking nut; 87, pressure spring; 91, support plate; 92, connecting frame; 93, cross bar; 94, brake push rod; 10, water pump. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] See also Figure 1-8 The embodiment of the present invention provides an internal sand core removal device for an aluminum alloy box-type casting, comprising a lifting frame 1 and a casting placement frame 2, which is slidably installed inside the lifting frame 1, a tray 3 is installed in the casting placement frame 2, a hollow rotating rod 4 is horizontally slidably installed on the top of the lifting frame 1, a contact crushing claw member 5 is elastically inserted at the bottom of the hollow rotating rod 4, and a pressing member 6 that abuts and cooperates with the contact crushing claw member 5 is externally threadedly sleeved on the hollow rotating rod 4, and a driving mechanism 7, the top of which is transmission-connected with the hollow rotating rod 4, and the bottom of which is intermittently abutted with the tray 3. While the driving mechanism 7 drives the hollow rotating rod 4 to rotate, it drives the tray 3 to lift and reciprocate, so that the casting on the tray 3 abuts against the contact crushing claw member 5, so that the contact crushing claw member is switched back and forth between the expanded and retracted states.

[0034] Specifically, the casting placement rack 2 and the lifting rack 1 are slidably connected. Before the sand core in the casting is removed, the casting needs to be placed on the tray 3 in the casting placement rack 2, and then the entire casting placement rack 2 is pushed into the lifting rack 1. When the casting is in and out, the height of the hollow rotating rod 4 and the abutting crushing claw 5 is changed by adjusting the height of the lifting rack 1 to avoid collision between the abutting crushing claw 5 and the outer wall of the casting. Corresponding sensors can be installed on the lifting rack 1 to monitor the position of the casting placement rack 2 to achieve automatic lifting. When the abutting crushing claw 5 enters the interior of the casting and contacts the sand core , let the driving mechanism 7 start working, drive the hollow rotating rod 4 and the abutting and crushing claw member 5 connected thereto to rotate synchronously, and at the same time, the driving mechanism 7 can also make the tray 3 vertically rise and fall in the casting placement rack 2. After the tray 3 lifts the casting, the bottom of the inner wall of the casting contacts with the rotating abutting and crushing claw member 5 and pushes the abutting and crushing claw member 5 upward, and then the abutting and crushing claw member 5 is gradually expanded inside the casting under the guidance of the pressing member 6. With the continuous rotation of the hollow rotating rod 4 and the reciprocating rise and fall of the tray 3, the abutting and crushing claw member 5 is folded and expanded during the rotation process to beat and crush the sand core. When leaving the casting, the contact and crushing claws 5 are automatically retracted to prepare for the next crushing operation. Through continuous rotation and lifting movements, the sand core inside the casting will be completely crushed. The contact and crushing claws 5 switch back and forth between the state of being expanded to contact and crush the sand core and the state of being retracted to facilitate movement and avoid damaging the surface of the casting, so that the sand core is effectively removed under multiple collisions and extrusions, and no hard impact is caused to the inner wall of the casting, thereby achieving efficient and non-destructive removal of the sand core inside the aluminum alloy box-type casting, and the removal is more thorough. At the same time, the contact and crushing claws 6 can be twisted according to castings of different shapes and sizes to contact and crush the sand core. The deployment range of the crushing claw member 5 can be adjusted by directly twisting the pressure member 6 to adjust the height. When the pressure member 6 becomes lower, the casting will be lifted up to abut the crushing claw member 5, and the entire deployment range of the abutting crushing claw member 5 will be larger. When the pressure member 6 becomes higher, the casting will be lifted up to abut the crushing claw member 5, and the deployment range of the abutting crushing claw member 5 will be reduced. Since the abutting crushing claw member 5 is elastic, it can prevent the abutting crushing claw member 5 from entering the casting and causing damage to the inner wall of the casting, avoiding damage to the casting during the knocking process, and can also allow the entire abutting crushing claw member 5 to be quickly reset and retracted under the action of elastic force after the casting drops.

[0035] The cam 3 is pressed against the bottom surface of the casting and the cam 3 is pressed against the bottom surface of the casting, so that the cam 3 is pressed against the bottom surface of the casting and the cam 3 is pressed against the bottom surface of the casting.

[0036] In a further embodiment of the present invention, guide grooves 21 are provided on both sides of the casting placement rack 2, and limit rods 31 inserted into the guide grooves 21 are fixedly connected on both sides of the tray 3. A movable groove 23 matching the length of the limit rods 31 is provided on the top of the guide grooves 21. Clamps 32 are elastically connected to both sides of the top of the tray 3. Specifically, a pair of clamps 32 on the top of the tray 3 can clamp and fix the casting placed on the tray 3 under the action of elastic force. When the limit rods 31 on both sides of the tray 3 are aligned with the guide grooves 21, the tray 3 can smoothly enter the casting placement rack 2. When the tray 3 is fully inserted, the movable groove 23 is just above the limit rod 31. When the driving mechanism 7 is started and drives the hollow rotating rod 4 to rotate and the tray 3 to rise and fall, the tray 3 moves in the movable groove 23 of the casting placement rack 2 through the limit rods 31 on both sides thereof to achieve stable lifting. As the tray 3 rises and falls and the hollow rotating rod 4 rotates, the sand core is vibrated against the bottom of the crushing claw 5, and the unfolded part slaps and crushes the sand core on the side wall. The clamping effect of the clamping plate 32 ensures the stability and accuracy of the casting during the sand core removal process, thereby improving the efficiency and quality of sand core removal.

[0037] In a further embodiment of the present invention, a cross beam 11 is installed in the lifting frame 1, and a connecting sleeve 41 is connected to the outer surface of the hollow rotating rod 4. The connecting sleeve 41 is slidably connected to the cross beam 11, and a track for horizontal sliding of the connecting sleeve 41 is installed on the cross beam 11. A locking member 8 is installed between the connecting sleeve 41, the cross beam 11 and the hollow rotating rod 4. Specifically, the connecting sleeve 41 is a hollow structure, which is sleeved on the outside of the hollow rotating rod 4. The hollow rotating rod 4 rotates radially in the connecting sleeve 41 and is connected to the cross beam 11 through the connecting sleeve 41. In order to fix the position of the connecting sleeve 41 on the cross beam 11 and ensure the stability of the hollow rotating rod 4 during rotation, a locking member 8 is added to lock the connecting sleeve 41, the hollow rotating rod 4 and the cross beam 11.

[0038] In a further embodiment of the present invention, the abutting crushing claw member 5 includes an insertion rod 51 inserted into the hollow rotating rod 4, the insertion rod 51 rotates synchronously with the hollow rotating rod 4, a top spring 52 is installed between the top of the insertion rod 51 and the hollow rotating rod 4, the top spring 52 is located inside the hollow rotating rod 4, a hemispherical end cover 53 is fixedly connected to the bottom of the insertion rod 51, and a plurality of connecting claws 54 distributed in an annular manner are elastically hinged on the edge of the hemispherical end cover 53, a torsion spring 56 is sleeved on the hinge shaft between the hemispherical end cover 53 and the connecting claw 54, and a pendulum 55 is installed at one end of the connecting claw 54. Specifically, the top spring 52 is used to provide a continuous downward thrust to the insertion rod 51, so that the abutting crushing claw member 5 can maintain a certain retracted state through the torsion spring 56 when not subjected to external force. When the hollow rotating rod 4 rotates, the abutting crushing claw member 5 rotates accordingly. Due to the action of the spring 52, the insertion rod 51 and the hemispherical end cover 53 always maintain a tendency to move downward, while the connecting claw 54 remains in a retracted state due to the action of the torsion spring 56. When the casting moves upward under the support of the tray 3, the hemispherical end cover 53 in the abutting crushing claw member 5 will be lifted up by the sand core inside the casting, and the connecting claw 54 is blocked by the pressure member 6 and then quickly opens under the reaction, and the pendulum 55 at the end of the connecting claw 54 is used to beat the sand core of the crushing side wall. At this time, the torsion spring 56 is compressed to store energy, and when the tray 3 descends with the casting, the top spring 52 makes the entire abutting crushing claw member 5 descend rapidly, and the force of the pressure member 6 on the connecting claw 54 becomes smaller, and the torsion spring 56 allows the connecting claw 54 to be retracted again. This process is repeated, allowing the connecting claw 54 to be retracted and then unfolded to break the sand core until the sand core in the casting is fully broken.

[0039] In a further embodiment of the present invention, the pressure member 6 includes a threaded sleeve 61 threadedly sleeved on the outside of the hollow rotating rod 4, and an annular boss 62 is fixedly connected to the bottom of the threaded sleeve 61. A limiting groove 63 matching the connecting claw 54 is provided on the outer side of the annular boss 62. Specifically, when the hollow rotating rod 4 rotates, the threaded sleeve 61 and the annular boss 62 at its bottom rotate synchronously with it. During this process, the connecting claw 54 is guided and constrained by the limiting groove 63 on the outer side of the annular boss 62, which can prevent the connecting claw 54 from deviating and shaking, and can also allow the connecting claw 54 in the abutting and crushing claw member 5 to move along a preset direction when the abutting and crushing claw member 5 is lifted up. The path of the inclined groove 311 is flipped until the pendulum 55 at the end of the connecting claw 54 hammers the internal sand core of the casting. This design not only ensures a stable and reliable connection between the connecting claw 54 and the hollow rotating rod 4, but also provides a flexible adjustment and locking mechanism for the entire device through threaded adjustment. By twisting the threaded sleeve 61 to raise and lower the annular boss 62, the distance between the annular boss 62 and the hemispherical end cover 53 is changed, and the angle at which the connecting claw 54 is forced to flip after being pressed when the hemispherical end cover 53 is squeezed upward can be changed, so that the working force and adaptability of the abutting crushing claw 5 can be flexibly controlled to meet the crushing requirements of sand cores of different specifications.

[0040] In a further embodiment of the present invention, the driving mechanism 7 includes a pair of transmission shafts 71 rotatably mounted on both sides of the inner wall of the lifting frame 1, one of the transmission shafts 71 is equipped with a driving motor 72, a transmission toothed belt 73 is installed between the two transmission shafts 71, and a driven gear ring 74 meshing with the transmission toothed belt 73 is fixedly sleeved on the outer side of the hollow rotating rod 4, and the driven gear ring 74 meshes with the inner wall of the transmission toothed belt 73. Specifically, when the driving motor 72 is started, it drives the transmission shaft 71 connected thereto to rotate, and this rotation action is transmitted to the other transmission shaft 71 through the transmission toothed belt 73, ensuring the synchronous rotation of the shafts on both sides. Subsequently, the meshing action between the transmission toothed belt 73 and the driven gear ring 74 enables the hollow rotating rod 4 to rotate with the movement of the transmission toothed belt 73. This design not only realizes the smooth transmission of power, but also ensures the rotation of the hollow rotating rod 4 through a precise meshing relationship. The accuracy and stability of the hollow rotating rod 4 allow the hollow rotating rod 4 to drive the entire abutting crushing claw member 5 to rotate at high speed. At the same time, the locking member 8 can cooperate with the driving mechanism 7. When the locking member 8 locks the connecting sleeve 41 and the hollow rotating rod 4, and the connecting sleeve 41 and the cross beam 11 are in a separated and active state, the operation of the transmission toothed belt 73 will drive the connecting sleeve 41 and the hollow rotating rod 4 to move horizontally to the left or right, which can facilitate the staff to observe the crushing of the sand core inside the casting without wanting to pull the casting placement frame 2 externally. After the observation is completed, the driving motor 72 is controlled to let the transmission toothed belt 73 rotate in the reverse direction to move the rotating shaft rod back to the center of the cross beam 11 for the next step of sand core crushing operation. When the top of the lifting frame 1 drops, the bottom of the transmission shaft rod 71 will pass through the base of the lifting frame 1 to ensure that the transmission shaft rod 71 can rotate stably at any height.

[0041] In a further embodiment of the present invention, an inclined groove 311 is provided at one end of the limiting rod 31, and a cam 75 that abuts against the inclined groove 311 is fixedly connected to the bottom of the transmission shaft 71, and the bottom of the cam 75 contacts the frame. Specifically, when the transmission shafts 71 on both sides rotate synchronously, the cam 75 fixed at the bottom rotates accordingly, and the cam 75 can slide inward along the inclined groove 311 at one end of the limiting rod 31. As the cam 75 rotates and abuts against the inclined groove 311, the inclination angle of the inclined groove 311 can allow the cam 75 to rotate. During the process, the limit rod 31 is gradually lifted up, thereby forcing the entire tray 3 to move up. After the cam 75 moves away from under the limit rod 31, the tray 3 descends again under the action of gravity. When the tray 3 is lifted up and down, the movable groove 23 in the guide groove 21 limits the limit rod 31 on the tray 3 in the horizontal direction, making the tray 3 more stable when lifted and lowered, avoiding the displacement of the tray 3 with the casting, and allowing the abutting crushing claw 5 to always crush the sand core attached to the inner wall in the central area inside the casting, so that the crushing range of the sand core is more comprehensive.

[0042] In a further embodiment of the present invention, the locking member 8 includes a hollow connecting plate 81 fixed to the back of the connecting sleeve 41, the bottom surface of the hollow connecting plate 81 is in contact with the top of the cross beam 11, and a pressure rod 82 that is frictionally transmitted with the hollow rotating rod 4 is inserted into the opening at one end of the hollow connecting plate 81, and an elastic pressure plate 83 is vertically inserted through the other end of the hollow connecting plate 81, and one side of the elastic pressure plate 83 is obliquely abutted against one end of the pressure rod 82. Specifically, the hollow connecting plate 81 is fixedly connected to the back of the connecting sleeve 41, and the bottom surface of this hollow connecting plate 81 is in close contact with the top of the cross beam 11, which ensures the stability of the locking member 8 during the translation of the connecting sleeve 41. The inner surface of the hollow connecting plate 81 is The hollow connecting plate 81 is provided with a slot for inserting a pressure rod 82. The pressure rod 82 passes through the connecting sleeve 41 and there is a friction transmission relationship between the pressure rod 82 and the hollow rotating rod 4. That is, when the pressure rod 82 is subjected to external force, it can limit the rotation of the hollow rotating rod 4 by friction. In addition, an elastic pressure plate 83 is vertically inserted through the hollow connecting plate 81. The cross-section of the elastic pressure plate is I-shaped. A plurality of screws 85 passing through the elastic connecting plate are fixed on the top of the hollow connecting plate 81. The top of the screw 85 is threadedly connected with a locking nut 86. The outer sleeve of the limiting rod 31 is provided with a pressure spring 87. The top end of the pressure spring 87 abuts against the locking nut 86, and the bottom end abuts against the top of the elastic abutment plate. The springs 87 simultaneously press down the elastic abutment plate, allowing the inclined protrusions to gradually press and push the pressure rod 82, causing the pressure rod 82 to move toward the hollow rotating rod 4, until the pressure rod 82 is completely pressed against the hollow rotating rod 4, and the hollow rotating rod 4 can no longer rotate under the drive of the transmission toothed belt 73. At this time, because the transmission toothed belt 73 and the driven gear ring 74 on the hollow rotating rod 4 are still meshed together, the hollow rotating rod 4 will translate to the left or right under the traction of the transmission toothed belt 73, and its movement The direction depends on the direction of rotation of the output shaft of the drive motor 72. Before moving the hollow rotating rod 4, the lifting frame 1 is first lifted to a certain height so that the abutting and crushing claw member 5 at the bottom of the hollow rotating rod 4 is above the casting. After the hollow rotating rod 4 and the abutting and crushing claw member 5 are removed, the staff can observe the crushing of the sand core inside the casting without being blocked. When crushing is required again, the drive motor 72 is controlled to rotate in the opposite direction to move the hollow rotating rod 4 back into the casting. Then, the pressure rod 82 is released by lifting the elastic abutment plate, so that the hollow rotating rod 4 can rotate freely in the connecting sleeve 41. After the transmission toothed belt 73 is running again, the hollow rotating rod 4 is driven to rotate again.

[0043] In a further embodiment of the present invention, a support plate 91 is vertically fixedly connected to the lifting frame 1, a connecting frame 92 is inserted in the supporting plate 91, a cross bar 93 is fixedly connected to the bottom of the connecting frame 92, a supporting block 22 for lifting the cross bar 93 is fixedly connected to the back of the casting placement frame 2, a brake push rod 94 is fixedly connected to the top of the connecting frame 92, and an anti-skid pad 84 is fixedly connected to the bottom of the elastic pressure plate 83, and the anti-skid pad 84 is located above the brake push rod 94. Specifically, when the connecting sleeve 41 is in the middle of the cross beam 11 with the hollow rotating rod 4, the casting placement frame 2 with the casting is pushed into the lifting frame 1. During the pushing process, the supporting block 22 on the back of the casting placement frame 2 will lift the cross bar 93 on the connecting frame 92, and the rising connecting frame 92 will first contact the anti-skid pad 84, and then lift the entire elastic pressure plate 83, so that the pressure rod 82 that was originally pressed against the hollow rotating rod 4 is forced to loosen, and at the same time, it can The position of the hollow rotating rod 4 is fixed, and then the pendulum 55 on the multiple connecting claws 54 continuously hammers and breaks the sand core, and the entire hollow rotating rod 4 will not deviate left and right. When it is necessary to observe the sand core crushing situation, the casting placement frame 2 can be pulled outward for a distance, and then the lifting frame 1 is lifted. Since the support block 22 is moved away from under the cross bar 93, the connecting frame 92 will drop to the previous height. While the connecting sleeve 41 can freely translate on the cross beam 11, the elastic pressure plate 83 will push the pressure rod 82 under the action of the pressure spring 87, and then the hollow rotating rod 4 is prevented from rotating alone in the connecting sleeve 41 by increasing the friction with the pressure rod 82, so that the transmission toothed belt 73 is allowed to run to directly drive the hollow rotating rod 4 and the abutting crushing claw member 5 to move away from above the casting, without manual operation, which is convenient for the staff to observe the sand core inside the casting and prevents the manual movement of the abutting crushing claw member 5 from causing damage.

[0044] In a further embodiment of the present invention, a water pump 10 is installed on the top of the hollow rotating rod 4, and a drain port 531 corresponding to the connecting claw 54 is installed on the top of the hemispherical end cover 53, and a water guide groove 541 is opened on the inner side of the connecting claw 54. Specifically, when the water pump 10 is started, it will pump water into the interior of the hollow rotating rod 4, and then enter the hemispherical end cover 53 along the hollow rotating rod 4. As the hollow rotating rod 4 rotates, the water reaches each drain port 531, and then is quickly discharged along the drain port 531 under the action of the pressure of the water pump 10 and the centrifugal force generated when the hollow rotating rod 4 rotates, and in the process meets the water guide groove 541 on the inner side of the connecting claw 54. The water guide groove 541 will guide the water flow along its internal path, ensuring that the water flow can be discharged from the equipment in an orderly and efficient manner, and impact the sand core in the crushing process in strands, thereby crushing and cleaning the sand core more comprehensively and quickly.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for removing sand cores inside aluminum alloy box-type castings, comprising a lifting frame (1), characterized in that: Also includes: A casting placement rack (2) is slidably mounted inside the lifting frame (1), and a tray (3) is installed inside the casting placement rack (2); A hollow rotating rod (4) is horizontally slidably mounted on the top of the lifting frame (1); a contact crushing claw member (5) is elastically inserted at the bottom of the hollow rotating rod (4); and a pressing member (6) that contacts and cooperates with the contact crushing claw member (5) is externally threadedly sleeved on the hollow rotating rod (4); A driving mechanism (7), the top of which is drivingly connected to the hollow rotating rod (4) and the bottom of which is intermittently abutted against the tray (3); The driving mechanism (7) drives the hollow rotating rod (4) to rotate, and at the same time drives the tray (3) to rise and fall back and forth, so that the casting on the tray (3) and the abutting crushing claw member (5) abut against each other, so that the abutting crushing claw member (5) switches back and forth between the expanded and retracted states.

2. The device for removing the internal sand core of an aluminum alloy box-type casting according to claim 1, characterized in that: Guide grooves (21) are provided on both sides of the casting placement rack (2), and limit rods (31) inserted into the guide grooves (21) are fixedly connected to both sides of the tray (3), and clamping plates (32) are elastically connected to both sides of the top of the tray (3).

3. The device for removing sand core inside aluminum alloy box-type casting according to claim 1, characterized in that: A crossbeam (11) is installed in the lifting frame (1), a connecting sleeve (41) is connected to the outer surface of the hollow rotating rod (4), the connecting sleeve (41) is slidably connected to the crossbeam (11), and a locking member (8) is installed between the connecting sleeve (41), the crossbeam (11) and the hollow rotating rod (4).

4. The device for removing the internal sand core of an aluminum alloy box-type casting according to claim 3, characterized in that: The abutting crushing claw member (5) comprises an insertion rod (51) inserted into the hollow rotating rod (4), a top spring (52) is installed between the top of the insertion rod (51) and the hollow rotating rod (4), a hemispherical end cover (53) is fixedly connected to the bottom of the insertion rod (51), a plurality of connecting claws (54) distributed in an annular shape are elastically hinged on the edge of the hemispherical end cover (53), and a pendulum (55) is installed at one end of the connecting claw (54).

5. The device for removing sand core inside aluminum alloy box-type casting according to claim 1, characterized in that: The pressing member (6) comprises a threaded sleeve (61) threadedly sleeved on the outside of the hollow rotating rod (4); an annular boss (62) is fixedly connected to the bottom of the threaded sleeve (61); and a limiting groove (63) matching the connecting claw (54) is formed on the outer side of the annular boss (62).

6. The device for removing sand core inside aluminum alloy box-type casting according to claim 1, characterized in that: The driving mechanism (7) comprises a pair of transmission shafts (71) rotatably mounted on both sides of the inner wall of the lifting frame (1), wherein a driving motor (72) is mounted on one of the transmission shafts (71), a transmission toothed belt (73) is mounted between the two transmission shafts (71), and a driven toothed ring (74) meshing with the transmission toothed belt (73) is fixedly sleeved on the outer side of the hollow rotating rod (4).

7. The device for removing sand core inside aluminum alloy box-type casting according to claim 6, characterized in that: An inclined groove (311) is formed at one end of the limiting rod (31), and a cam (75) abutting against the inclined groove (311) is fixedly connected to the bottom of the transmission shaft (71).

8. The device for removing sand core inside aluminum alloy box-type casting according to claim 2, characterized in that: The locking member (8) comprises a hollow connecting plate (81) fixed to the back side of the connecting sleeve (41), the bottom surface of the hollow connecting plate (81) contacts the top of the cross beam (11), a pressure rod (82) is inserted into the hollow connecting plate (81) for friction transmission with the hollow rotating rod (4), and an elastic pressure plate (83) is vertically inserted through the hollow connecting plate (81), and one side of the elastic pressure plate (83) is inclined against one end of the pressure rod (82).

9. The device for removing sand core inside aluminum alloy box-type casting according to claim 8, characterized in that: A support plate (91) is vertically fixedly connected to the lifting frame (1), a connecting frame (92) is inserted into the support plate (91), a cross bar (93) is fixedly connected to the bottom of the connecting frame (92), a support block (22) for lifting the cross bar (93) is fixedly connected to the back of the casting placement frame (2), a brake push rod (94) is fixedly connected to the top of the connecting frame (92), and an anti-skid pad (84) is fixedly connected to the bottom of the elastic pressure plate (83), and the anti-skid pad (84) is located above the brake push rod (94).

10. The device for removing sand core inside aluminum alloy box-type casting according to claim 1, characterized in that: A water pump (10) is installed on the top of the hollow rotating rod (4), a drainage port (531) corresponding to the connecting claw (54) is installed on the top of the hemispherical end cover (53), and a water guide groove (541) is opened inside the connecting claw (54).

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