Sand box separating machine

Abstract

According to the sand box separating machine, a walking frame capable of moving in the length direction is installed on a vertical frame, an upper sand box grabbing device and a lower sand box grabbing device are installed on the walking frame, an upper sand box and a lower sand box can be grabbed through a lifting table and a clamping jaw respectively, and after grabbing is completed, synchronous transferring of the upper sand box and the lower sand box can be achieved; and the upper sand box and the lower sand box are synchronously transferred to the molding line from the conveying line. Compared with a traditional single grabbing device step-by-step operation mode, the box separation efficiency can be remarkably improved, the lifting tables of the two sand box grabbing devices adopt differential stroke design, the grabbing requirements of sand boxes with different heights can be accurately matched, fatigue damage to the lifting driving mechanisms of the grabbing devices is avoided, and the service life of the devices is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of static pressure molding line equipment, specifically a sand box separating machine. Background Technology

[0002] A static pressure molding line is an automated molding equipment used in the foundry industry, primarily for forming clay sand molds. It is suitable for casting production with horizontal parting and sand box molding. The main components include a sand box return line, a sand box separator, a static pressure molding machine, a roller conveyor line, a box-removing machine, and a cooling line. The first step in the production process is to transfer the upper and lower sand boxes stacked on the return line to the molding line using the sand box separator. Existing sand box separators typically have only one set of gripping devices. The upper sand box must be gripped and transferred before the lower sand box can be transferred. Furthermore, because the upper and lower sand boxes are at different heights, the gripping device needs to constantly adjust its lifting height to accommodate the upward and downward gripping actions. This not only affects the efficiency of the box-separation operation but also easily causes fatigue damage to the lifting drive mechanism of the gripping device. Summary of the Invention

[0003] The purpose of this utility model is to provide a sand box sorting machine, in which an upper sand box gripping device and a lower sand box gripping device are installed on the walking frame, which respectively realize the gripping of the upper and lower sand boxes and the synchronous transfer of the upper and lower sand boxes, thereby improving production efficiency and solving the problems of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a sand box sorting machine, including a vertical frame, on which a traveling frame that can move along the length direction is installed. The traveling frame is provided with an upper sand box gripping device and a lower sand box gripping device. Both the upper sand box gripping device and the lower sand box gripping device include a lifting platform that can move vertically relative to the traveling frame. Both sides of the lifting platform are equipped with rotatable and openable grippers. When the grippers rotate and approach, they can realize the positioning and gripping of the upper or lower sand box. When the traveling frame moves along the length direction of the vertical frame, it can drive the upper and lower sand boxes to be synchronously transferred from the return line to the molding line through the grippers. The traveling frame is provided with a first hinge seat on one side, on which a drive motor is hingedly mounted. A drive gear is mounted on the output shaft of the drive motor. A rack that meshes with the drive gear is provided on the upright frame. A first guide wheel is also mounted on the housing of the drive motor. The rack is located between the drive gear and the first guide wheel. Traveling wheels are mounted at both ends of the traveling frame along its length. A guide rail that mates with the traveling wheels is provided on the upright frame. A guide seat is mounted on the traveling frame. Two sets of second guide wheels that mate with the guide rail are provided at the bottom of the guide seat. The guide rail is located between the two sets of second guide wheels. A second hinge seat is installed on the lifting platform. A lifting cylinder is installed between the second hinge seat and the traveling frame. The cylinder barrel of the lifting cylinder is fixed on the traveling frame. The piston rod of the lifting cylinder is hinged to the second hinge seat through a spherical bearing. Vertically arranged guide rods are also provided on the lifting platform on both sides of the second hinge seat. Guide sleeves that cooperate with the guide rods are installed on the traveling frame. The vertical travel of the lifting cylinder and guide rods in the upper sand box gripping device is less than that in the lower sand box gripping device. Several upward limiting mechanisms are installed on the lifting platform. After the upward limiting mechanism contacts the traveling frame, the lifting platform and gripper move upward to the limit position. Each upward limiting mechanism includes a slotted plate frame. A threaded hole is opened on the top of the slotted plate frame. A limiting screw is installed in the threaded hole. A nut is installed on the limiting screw between the screw head and the slotted plate frame. Rotating the nut can adjust the length of the limiting screw extending upward from the slotted plate frame. A first limiting hook is installed on one side of the walking frame, and a second limiting hook is installed on the other side of the walking frame. A first limiting block is installed on the upright above the return line, and a second limiting block is installed on the upright above the molding line. When the walking frame moves to the point where the first limiting hook contacts the first limiting block, the upper sand box gripping device and the lower sand box gripping device are located on the return line. When the walking frame moves to the point where the second limiting hook contacts the second limiting block, the upper sand box gripping device and the lower sand box gripping device are located on the molding line.The grippers are mounted on the lifting platform via hinge shafts. A first linkage plate is provided at the end of one gripper on the same side, and a second linkage plate is provided at the end of the other gripper. A drive cylinder is hinged between the upper parts of the first and second linkage plates, and a linkage rod is hinged between the lower part of the first and the upper part of the second linkage plates. The piston rod of the drive cylinder can extend and retract to drive the grippers on both sides to rotate and open. A limit plate is also provided on one of the grippers, and a third limit hook is installed at the bottom of the traveling frame. A limit groove that cooperates with the third limit hook is opened on the side of the limit plate. When the gripper rotates and opens, the third limit hook can separate from the limit groove, and the lifting platform can move vertically downward relative to the third limit hook.

[0005] The advantages of this invention are as follows: The sand box sorting machine of this invention has a moving frame installed on the upright frame. The moving frame is equipped with an upper sand box gripping device and a lower sand box gripping device. The upper and lower sand boxes can be gripped separately via a lifting platform and grippers. After gripping, the upper and lower sand boxes can be synchronously transferred from the conveyor line to the molding line. Compared with the traditional single-grip device step-by-step operation, this significantly improves the sorting efficiency. Furthermore, the lifting platforms of the two sand box gripping devices adopt a differentiated stroke design, which can accurately match the gripping requirements of sand boxes of different heights, avoiding fatigue damage to the lifting drive mechanism of the gripping device and extending the service life of the device. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model;

[0007] Figure 2 This is the front view of this utility model;

[0008] Figure 3 yes Figure 2 The right view;

[0009] Figure 4 yes Figure 2 Top view;

[0010] Figure 5 yes Figure 4 An enlarged view of the sectional view along the AA direction;

[0011] Figure 6 yes Figure 4 An enlarged view of the BB-axis sectional view;

[0012] Figure 7 This is a schematic diagram of a structure with a lifting platform installed at the bottom of the traveling frame;

[0013] Figure 8 This is a schematic diagram of the upward limiting mechanism;

[0014] Figure 9 yes Figure 4 An enlarged view of the sectional view along the CC direction;

[0015] Figure 10 This is a schematic diagram showing the engagement of the lifting platform's limit plate and the third limit hook.

[0016] Figure 11 yes Figure 10 A schematic diagram showing the state of the third limiting hook separating from the limiting groove after the middle structure gripper is opened;

[0017] Figure 12 This is a schematic diagram showing the state of the gripper moving to the molding line after it has grasped the sand box. Detailed Implementation

[0018] The sand box separating machine described in this utility model, such as Figure 1-4 As shown, it includes a stand 1, which is located on the return line and the shaping line. A traveling frame 2 that can move along the length direction is installed on the stand 1. The traveling frame 2 can move back and forth on the return line and the shaping line.

[0019] The traveling frame 2 is equipped with an upper sand box gripping device and a lower sand box gripping device, which can respectively grip and transfer the upper and lower sand boxes on the return line. Both the upper and lower sand box gripping devices include a lifting platform 3 that can move vertically relative to the traveling frame 2. Rotatable and opening grippers 4 are installed on both sides of the lifting platform 3. When the grippers 4 rotate and approach, they can position and grip the upper or lower sand box. When the traveling frame 2 moves along the length of the upright frame 1, it can synchronously transfer the upper and lower sand boxes from the return line to the molding line via the grippers 4. The grippers 4 can be existing robotic arms, whose opening and closing actions can clamp or lower the sand boxes.

[0020] On the return line, the upper and lower sand boxes are moved to the bottom of the upright frame 1. The traveling frame 2 moves the upper sand box gripping device and the lower sand box gripping device to the upper side of the return line. The upper sand box gripping device moves down to grip the upper sand box, and then moves the upper sand box up. The sand box on the return line moves forward by one unit length. The lower sand box gripping device moves down to grip the lower sand box that is left after the upper sand box has been gripped, and moves the lower sand box up. Then the traveling frame 2 moves back to the molding line. The upper sand box gripping device and the lower sand box gripping device move down together to place the gripped upper and lower sand boxes on the molding line. Repeating the above steps can realize the transfer of sand boxes on the return line and the molding line.

[0021] In traditional sand box sorting machines, the movement of the traveling frame 2 is mostly achieved by telescopic hydraulic cylinders. As the driving mechanism for the reciprocating movement of the traveling frame 2, the hydraulic cylinder has the disadvantage of slow response speed, which reduces the moving efficiency of the traveling frame 2 during reciprocating telescopic movement. To solve the above problems and improve the reciprocating movement efficiency of the traveling frame 2, such as... Figure 5 As shown, a first hinge seat 5 may be provided on one side of the traveling frame 2. A drive motor 6 is hingedly mounted on the first hinge seat 5. A drive gear 7 is mounted on the output shaft of the drive motor 6. A rack 8 that meshes with the drive gear 7 is provided on the upright frame 1. Through the transmission of the rack and gear and the drive motor 6 as the driving mechanism, the response speed of the traveling frame 2 during movement can be improved, the reciprocating movement speed of the traveling frame 2 can be accelerated, and thus the efficiency of the box-separating operation can be improved.

[0022] To ensure that the drive gear 7 remains engaged with the rack 8 during the movement of the walking frame 2 and to achieve continuous input of walking power, a first guide wheel 9 is also installed on the housing of the drive motor 6. The rack 8 is located between the drive gear 7 and the first guide wheel 9. The rack 8 is clamped and fixed by the first guide wheel 9 and the drive gear 7. At the same time, the first hinge seat 5 allows the walking frame 2 to swing slightly relative to the drive motor 6 during the movement without affecting the normal power output of the drive motor 6 to the walking frame 2.

[0023] Furthermore, in order to ensure the stability of the traveling frame 2 when it travels along the upright frame 1, such as... Figure 6 As shown, both ends of the walking frame 2 along its length can be equipped with walking wheels 10. The upright frame 1 is provided with guide rails 11 that cooperate with the walking wheels 10. The walking frame 2 is equipped with a guide seat 12. The bottom of the guide seat 12 is provided with two sets of second guide wheels 13 that cooperate with the guide rails 11. The guide rails 11 are located between the two sets of second guide wheels 13. The second guide wheels 13 form a clamping and guiding action on the guide rails 11, thereby ensuring that the walking frame 2 can move along the length of the guide rails 11 when it moves.

[0024] Furthermore, in order to achieve stable vertical lifting of the lifting platform 3 relative to the traveling frame 2, such as... Figure 7 As shown, a second hinge seat 14 is installed on the lifting platform 3. A lifting cylinder 15 is installed between the second hinge seat 14 and the traveling frame 2. The cylinder barrel of the lifting cylinder 15 is fixed on the traveling frame 2, and the piston rod of the lifting cylinder 15 is hinged to the second hinge seat 14 through a joint bearing 16. The arrangement of the second hinge seat 14 and the joint bearing 16 allows the lifting platform 3 to swing within a permissible range relative to the traveling frame 2 during vertical lifting, thereby achieving precise clamping and fixing of the sand box.

[0025] Vertically arranged guide rods 17 are also provided on the lifting platforms 3 on both sides of the second hinge seat 14, and guide sleeves 18 that cooperate with the guide rods 17 are installed on the traveling frame 2. In order to adapt to the different height positions of the upper and lower sand boxes, the vertical stroke of the lifting cylinder 15 and guide rod 17 in the upper sand box gripping device is less than that in the lower sand box gripping device, which allows the lower sand box gripping device to move vertically downward a greater distance, so as to grip the lower sand box in a lower position.

[0026] Furthermore, in order to lock the lifting platform 3 in the upper and lower sand box gripping devices to the limit position of the upward movement, and to avoid hard collision between the lifting platform 3 and the walking frame 2, thereby extending the service life of the device, several upward movement limiting mechanisms can be installed on the lifting platform 3. After the upward movement limiting mechanism contacts the walking frame 2, the lifting platform 3 and the gripper 4 move upward to the limit position.

[0027] like Figure 8 As shown, each upward limiting mechanism includes a slotted plate frame 19. A threaded hole is provided at the top of the slotted plate frame 19, and a limiting screw 20 is installed inside the threaded hole. The screw head of the limiting screw 20 can contact the bottom of the traveling frame 2, thus forming a mechanical limit. A nut 21 is installed on the limiting screw 20 between the screw head and the slotted plate frame 19. Rotating the nut 21 can adjust the length of the limiting screw 20 extending upward from the slotted plate frame 19, thereby adapting to the upward limit height requirements of different types of sandboxes.

[0028] Furthermore, to limit the movement of the traveling frame 2 when it reciprocates between the return line and the shaping line, a first limiting hook 22 can be installed on one side of the traveling frame 2, and a second limiting hook 23 can be installed on the other side. A first limiting block 24 is installed on the upright 1 above the return line, and a second limiting block 25 is installed on the upright 1 above the shaping line. The first limiting hook 22 and the first limiting block 24 being located on the same side, and the second limiting hook 23 and the second limiting block 25 being located on the same side, enable movement limitation.

[0029] When the traveling frame 2 moves to the point where the first limit hook 22 contacts the first limit block 24, the upper sand box gripping device and the lower sand box gripping device are located on the return line. When the traveling frame 2 moves to the point where the second limit hook 23 contacts the second limit block 25, the upper sand box gripping device and the lower sand box gripping device are located on the molding line.

[0030] Furthermore, in order to drive the opening and closing action of the gripper 4, the gripper 4 can be mounted on the lifting platform 3 via a hinge shaft. One gripper 4 is provided with a first linkage plate 26 at one end on the same side, and the other gripper 4 is provided with a second linkage plate 27 at one end. A drive cylinder 28 is hinged between the upper parts of the first linkage plate 26 and the second linkage plate 27, and a linkage rod 29 is hinged between the lower part of the first linkage plate 26 and the upper part of the second linkage plate 27. The extension and retraction of the piston rod of the drive cylinder 28 can drive the grippers 4 on both sides to rotate and open and close.

[0031] To ensure that the lifting platform 3 moves down towards the sand box only after the gripper 4 has opened when grasping the sand box, thus avoiding collision and interference between the closed gripper 4 and the sand box, such as... Figure 10 and Figure 11As shown, a limiting plate 30 is also provided on one of the grippers 4, and a third limiting hook 31 is installed at the bottom of the traveling frame 2. A limiting groove 32 that cooperates with the third limiting hook 31 is opened on the side of the limiting plate 30. When the gripper 4 is rotated open, the third limiting hook 31 can separate from the limiting groove 32, and the lifting platform 3 can move vertically downward relative to the third limiting hook 31.

[0032] When the sand box gripping device moves from the molding line to the return line, the third limiting hook 31 is located in the limiting groove 32, and the gripper 4 does not rotate to open. The lifting platform 3 is limited by the third limiting hook 31 and cannot move downward. After the sand box gripping device moves to the return line, the gripper 4 rotates to open. At this time, the limiting plate 30 rotates synchronously with the gripper 4, and the limiting groove 32 disengages from the third limiting hook 31. When the gripper 4 is in the open state, the lifting platform 3 can move downward relative to the traveling frame 2, allowing the gripper 4 to grip the sand box. After the sand box is gripped, the lifting platform 3 moves the sand box upward. At this time, the gripper 4 is in the closed clamping state, and the limiting plate 30 on the lifting platform 3 moves upward to the lower position of the third limiting hook 31. Figure 12 As shown, the sand box moved to this position can move horizontally normally, and the third limiting hook 31 will not interfere with the vertical movement of the limiting plate 30 and the lifting platform 3. After reaching the molding line, the lifting platform 3 moves down, the gripper 4 rotates and opens, and the sand box is placed on the molding line. Then, the lifting platform 3 moves up while the gripper 4 is in the open state until the limiting groove 32 on the lifting platform 3 moves to the height position of the third limiting hook 31. Then, the gripper 4 rotates and closes, allowing the limiting groove 32 of the limiting plate 30 to enter the third limiting hook 31, so that the vertical movement of the lifting platform 3 can be locked again, so as to facilitate the subsequent repeated sand box transfer operation.

[0033] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A sand box separating machine, characterized in that: It includes a stand (1), on which a walking frame (2) that can move along the length direction is installed. The walking frame (2) is equipped with an upper sand box gripping device and a lower sand box gripping device. Both the upper sand box gripping device and the lower sand box gripping device include a lifting platform (3) that can move vertically relative to the walking frame (2). Both sides of the lifting platform (3) are equipped with rotatable and openable grippers (4). When the grippers (4) rotate and approach, they can realize the positioning and gripping of the upper sand box or the lower sand box. When the walking frame (2) moves along the length direction of the stand (1), it can drive the upper sand box and the lower sand box to be synchronously transferred from the return line to the molding line through the grippers (4).

2. The sand box separating machine according to claim 1, characterized in that: The walking frame (2) is provided with a first hinge seat (5) on one side, and a drive motor (6) is hinged on the first hinge seat (5). A drive gear (7) is installed on the output shaft of the drive motor (6). A rack (8) that meshes with the drive gear (7) is provided on the upright frame (1). A first guide wheel (9) is also installed on the housing of the drive motor (6). The rack (8) is located between the drive gear (7) and the first guide wheel (9). Walking wheels (10) are installed at both ends of the walking frame (2) along its length. A guide rail (11) that cooperates with the walking wheel (10) is provided on the upright frame (1). A guide seat (12) is installed on the walking frame (2). Two sets of second guide wheels (13) that cooperate with the guide rail (11) are provided at the bottom of the guide seat (12). The guide rail (11) is located between the two sets of second guide wheels (13).

3. A sand box separating machine according to claim 1, characterized in that: The lifting platform (3) is equipped with a second hinge seat (14), and a lifting cylinder (15) is installed between the second hinge seat (14) and the walking frame (2). The cylinder of the lifting cylinder (15) is fixed on the walking frame (2), and the piston rod of the lifting cylinder (15) is hinged to the second hinge seat (14) through a joint bearing (16). Vertically arranged guide rods (17) are also provided on the lifting platform (3) on both sides of the second hinge seat (14). A guide sleeve (18) that cooperates with the guide rod (17) is installed on the walking frame (2). The vertical stroke of the lifting cylinder (15) and the guide rod (17) in the upper sand box grabbing device is less than the vertical stroke of the lifting cylinder (15) and the guide rod (17) in the lower sand box grabbing device.

4. A sand box separating machine according to claim 1, characterized in that: The lifting platform (3) is equipped with several upward limiting mechanisms. After the upward limiting mechanism comes into contact with the walking frame (2), the lifting platform (3) and the gripper (4) move upward to the limit position. Each upward limiting mechanism includes a slot plate frame (19). The top of the slot plate frame (19) is provided with a threaded hole. A limiting screw (20) is installed in the threaded hole. A nut (21) is installed on the limiting screw (20) between the screw head and the slot plate frame (19). Rotating the nut (21) can adjust the length of the limiting screw (20) extending upward from the slot plate frame (19).

5. A sand box separating machine according to claim 1, characterized in that: The walking frame (2) is equipped with a first limiting hook (22) on one side and a second limiting hook (23) on the other side. A first limiting block (24) is installed on the upright (1) above the return line and a second limiting block (25) is installed on the upright (1) above the shaping line. When the walking frame (2) moves to the point where the first limiting hook (22) contacts the first limiting block (24), the upper sand box gripping device and the lower sand box gripping device are located on the return line. When the walking frame (2) moves to the point where the second limiting hook (23) contacts the second limiting block (25), the upper sand box gripping device and the lower sand box gripping device are located on the shaping line.

6. A sand box separating machine according to claim 1, characterized in that: The gripper (4) is mounted on the lifting platform (3) via a hinge shaft. One gripper (4) on the same side has a first linkage plate (26) at its end and the other gripper (4) has a second linkage plate (27) at its end. A drive cylinder (28) is hinged between the upper parts of the first linkage plate (26) and the second linkage plate (27). A linkage rod (29) is hinged between the lower part of the first linkage plate (26) and the upper part of the second linkage plate (27). The piston rod extension and retraction can drive the grippers (4) on both sides to rotate and open and close. A limiting plate (30) is also provided on one of the grippers (4). A third limiting hook (31) is installed at the bottom of the walking frame (2). A limiting groove (32) that cooperates with the third limiting hook (31) is opened on the side of the limiting plate (30). When the gripper (4) rotates and opens, the third limiting hook (31) can separate from the limiting groove (32), and the lifting platform (3) can move vertically downward relative to the third limiting hook (31).

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