An active scraping mechanism with linkage lifting

Abstract

This invention provides an active scraping mechanism with linkage lifting, involving a scraping structure including a movable guide frame, a hanging frame, a hydraulic cylinder, a pneumatic cylinder, a connecting rod, and a scraper. The upper and lower boxes are conveyed on a molding section conveyor frame. Two sets of movable guide frames are installed on the molding section conveyor frame via rollers. The two ends of the hanging frame are connected to the two sets of movable guide frames. The driving end of the hydraulic cylinder installed on the molding section conveyor frame is connected to the middle of the hanging frame. Connecting rods are also connected to both sides of the hanging frame via connecting plates. The ends of the connecting rods are connected to a set of base frames, and the two ends of the connecting rods are respectively rotatably installed to the connecting plate and the base frame via pins. The scraper is installed on the base frame to serve as a cleaning mechanism for scraping the lower box surface of the thin-walled box. A pneumatic cylinder is also hinged to the movable guide frame, and the driving end of the pneumatic cylinder is rotatably connected to the end of the base frame via a rotating shaft. This invention can complete the scrapping of the upper and lower box surfaces of different heights, thereby reducing the scrap rate caused by sand padding.

Description

Technical Field

[0001] This invention relates to a scraping structure, and more particularly to an active scraping mechanism with a linkage lifting mechanism. Background Technology

[0002] For high-speed lines with dual main units, a single-line wiring method is adopted. The pushing mechanism pushes the upper and lower sand boxes simultaneously in the molding section. The existing scraping mechanism is passive. If the height of the upper and lower boxes is inconsistent, the lower surface of the thin sand box cannot be scraped during the process. If the scraping mechanism cannot scrape the lower surface of the thin box, the sand padding on the lower box surface will increase the scrap rate when the molding main unit is molding. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention aims to provide an active scraping mechanism with a linkage lifting mechanism, which is arranged below the thin box in front of the main machine of the molding section. The scraping process is actively driven by a hydraulic cylinder to move back and forth in the horizontal direction, while the lifting action is completed by a cylinder driving the linkage. The action is more stable and reliable, and it can complete the scrapping of the upper and lower box surfaces at different heights, thereby reducing the scrap rate caused by sand padding.

[0004] This invention provides the following technical solution:

[0005] An active scraping mechanism with linkage lifting includes a movable guide frame, a hanging frame, a hydraulic cylinder, a pneumatic cylinder, a connecting rod, and a scraper. The upper and lower boxes are conveyed on a molding section conveyor frame. Two sets of movable guide frames are installed on the molding section conveyor frame via rollers. Both ends of the hanging frame are connected to the two sets of movable guide frames. The driving end of the hydraulic cylinder installed on the molding section conveyor frame is connected to the middle of the hanging frame. Connecting rods are also connected to both sides of the hanging frame via connecting plates. The ends of the connecting rods are connected to a set of base frames, and both ends of the connecting rods are rotatably installed with the connecting plates and the base frames via pins. The scraper is installed on the base frame to serve as a cleaning mechanism for scraping the lower box surface of the thin box. A pneumatic cylinder is also hinged to the movable guide frame, and the driving end of the pneumatic cylinder is rotatably connected to the end of the base frame via a rotating shaft.

[0006] Therefore, after the cylinder is started, the scraper can be raised and lowered by the base frame, and the hydraulic cylinder can drive the entire mechanism to move back and forth in the horizontal direction. The entire mechanism is arranged under the thin box in front of the main unit of the molding section. Before the box is pushed, the cylinder control linkage lowers the cleaning mechanism to the bottom position. Then the hydraulic cylinder pushes the mechanism out. After the box is pushed, the cylinder control linkage rises to the height of the box surface and then the hydraulic cylinder actively retracts to complete the scraping of the box surface. The scraping process is actively driven by the hydraulic cylinder, and the lifting action is completed by the cylinder driving the linkage. The action is stable and reliable, and it can complete the scrapping of the upper and lower box surfaces of different heights, thereby reducing the scrap rate caused by sand padding.

[0007] Preferably, two sets of parallel connecting rods are provided on each side of the base frame, and a limiting block is also provided on the connecting plate between the two sets of connecting rods. The limiting block is connected to the bolt by a fixed nut to limit the swing angle of the connecting rod. The setting of two sets of connecting rods on each side can not only improve the stability of the structure, but also reduce the safety risk caused by cylinder failure by limiting the connection by bolts, making the mechanism more stable and reliable. At the same time, the thread adjustment of the bolt relative to the nut can also improve the overall adaptability of the mechanism.

[0008] Preferably, the base frame includes a set of crossbeams for mounting the scraper blades and side frames mounted on both sides of the crossbeams.

[0009] Preferably, both ends of the crossbeam are connected to the side frame via a flex connection. The side frame is also equipped with a motor for driving the crossbeam to rotate circumferentially. At least two sets of scraper blades are provided and are evenly distributed around the periphery of the crossbeam. The scraper blades are detachably connected to the crossbeam. Therefore, after the top scraper blades have been working for a certain period of time, the next set of scraper blades can be rotated to the top by rotating the crossbeam to continue the cleaning operation, thereby saving the time of scraper blade maintenance and replacement.

[0010] Preferably, the scraper blade includes a Z-shaped support plate and a scraper blade body installed on top of the support plate. The support plate is guided and connected to a guide post fixed on a crossbeam. The crossbeam is also provided with an insertion group for positioning the guide post through the support plate. That is, the scraper blade and the crossbeam can be detachably positioned by abutting the support plate against the crossbeam, with the guide post passing through the support plate and the insertion group passing through the support plate to insert the guide post. The installation and disassembly are relatively convenient.

[0011] Preferably, the insertion group includes two sets of insertion blocks slidably mounted on the crossbeam along the axial direction of the crossbeam. One end of each insertion block is provided with an insertion rod, and the other end is connected to a compression spring. The end of the compression spring presses against a set of positioning plates. The positioning plates are fixed on the crossbeam between the two sets of insertion blocks. The insertion rod is inserted into the guide post through the support plate under the pressure of the compression spring.

[0012] Preferably, the scraper blades are provided in two sets. When the scraper blades are rotated to the bottom by the motor, the insertion rod is disengaged from the guide post and support plate by compressing the compression spring, so as to complete the maintenance and replacement of the scraper blades.

[0013] Preferably, each of the two sets of insert blocks has a slot and a post on one side facing each other. A sealing rod is provided on the side of the slot. The end of the sealing rod is provided with an inclined surface that matches the conical surface of the end of the post. The side of the post is also provided with a sealing groove for insertion and positioning with the sealing rod. A frame is provided on the insert block. The end of the sealing rod is supported on the frame. A side stop is provided on the sealing rod. A shaft passing through the frame is fixed on the side stop. A compression spring is also sleeved on the shaft, pressing against the side stop and the frame. A set of triangular blocks is also provided on the sealing rod.

[0014] Preferably, the scraper blades are provided in four sets, corresponding to the scraping station, disassembly station, unloading station, and installation station, respectively. The scraper blades at the scraping station are used for cleaning operations. At the disassembly station, the scraper blades are aligned with a set of top blocks driven by a top cylinder, which is mounted on the molding section conveyor frame. Both sets of insert blocks are also provided with inclined surfaces that taper inwards. The top blocks have flared grooves that mate with the inclined surfaces. When the scraper blade to be replaced rotates to the disassembly station, the top cylinder drives the top blocks to press against the two sets of insert blocks, causing them to move towards each other until the insert is inserted into the slot and the sealing rod is inserted into the sealing groove under the pressure of the compression spring. At this point, the insert is disengaged from the guide post and support plate, and the scraper... When the scraper rotates to the bottom unloading station, the support plate causes the scraper to fall freely from the guide post under gravity. A set of push blocks is set at the installation station. The end of the push block is provided with an angled surface that cooperates with the triangular block. The push block pushes the triangular block under the drive of the push cylinder on the molding section conveyor frame. After the support plate corresponding to the new scraper is guided into the guide post, the push triangular block drives the sealing rod to disengage from the sealing groove. Then, the two sets of insert blocks are sprung open under the drive of the compression spring, so that the insert rod passes through the support plate and inserts into the guide post. This realizes the positioning of the new scraper on the crossbeam. Thus, the maintenance and replacement of the scraper can be completed automatically, which is not only more convenient, but also has a higher degree of automation and maintenance efficiency.

[0015] The beneficial effects of this invention are as follows: The purpose of this invention is to provide an active scraping mechanism with a linkage lifting mechanism, which is arranged below the thin box in front of the main machine in the molding section. Before the box is pushed, the cylinder controls the linkage to lower the cleaning mechanism to the bottom position. Then, the hydraulic cylinder pushes the mechanism out. After the box is pushed, the cylinder controls the linkage to rise to the height of the low box surface, and then the hydraulic cylinder actively retracts to complete the scraping of the box surface. The scraping process is actively driven by the hydraulic cylinder, and the lifting action is completed by the cylinder driving the linkage. The action is stable and reliable, and it can complete the scrapping of the upper and lower box surfaces at different heights, thereby reducing the scrap rate caused by sand padding. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0019] Figure 3 This is a schematic diagram of four sets of scraper blades distributed on the crossbeam in Example 2;

[0020] Figure 4 This is a schematic diagram of the structure with a support plate installed on one side of the crossbeam.

[0021] Figure 5 yes Figure 4 A schematic diagram showing the distribution of the two sets of insert blocks in the middle;

[0022] Figure 6 This is a schematic diagram of the structure of the jacking block and the jacking triangular block;

[0023] Figure 7 This is a schematic diagram of the structure where the top block pushes against the two sets of insert blocks;

[0024] Markings in the diagram:

[0025] 1. Moving guide frame; 2. Hanger; 3. Hydraulic cylinder; 4. Pneumatic cylinder; 5. Connecting rod; 6. Scraper brush; 7. Roller; 21. Connecting plate; 22. Base frame; 23. Pin; 24. Rotating shaft; 25. Limiting block; 26. Nut; 27. Bolt; 221. Crossbeam; 222. Side frame; 61. Support plate; 62. Scraper brush body; 63. Guide column; 64. Insertion assembly; 641. Insertion block; 642. Insertion rod; 643. Compression spring; 644. Positioning plate 645, Slot; 646, Insert post; 647, Sealing rod; 648, Inclined surface; 649, Sealing groove; 6410, Frame; 6411, Side guard; 6412, Shaft; 6413, Compression spring; 6414, Triangular block; 6415, Inclined surface; 100, Scraping station; 200, Disassembly station; 300, Unloading station; 400, Installation station; 500, Top block; 600, Flared groove; 700, Push block; 800, Angled surface. Detailed Implementation

[0026] Example 1

[0027] like Figure 1-2As shown, an active scraping mechanism with linkage lifting is provided in this embodiment. It includes a movable guide frame 1, a hanging frame 2, a hydraulic cylinder 3, a pneumatic cylinder 4, a connecting rod 5, and a scraper 6. The upper and lower boxes are transported on the shaping section conveyor frame. The movable guide frame 1 is provided in two sets and is horizontally rolled on the shaping section conveyor frame via rollers 7. The two ends of the hanging frame 2 are connected to the two sets of movable guide frames 1. The driving end of the hydraulic cylinder 3 installed on the shaping section conveyor frame is connected to the middle of the hanging frame 2. The two sides of the hanging frame 2 are also connected to the connecting plate 21 via the connecting plate 21. The end of the connecting rod 5 is connected to a set of base frames 22, and the two ends of the connecting rod 5 are respectively rotatably installed with the connecting plate 21 and the base frame 22 via the pin 23. The scraper 6 is installed on the base frame 22 to serve as a cleaning mechanism to scrape the lower box surface of the thin box. The moving guide frame 1 is also hinged to a pneumatic cylinder 4. The driving end of the pneumatic cylinder 4 is rotatably connected to the end of the base frame 22 via the rotating shaft 24.

[0028] Therefore, after cylinder 4 is started, it can drive the scraper 6 to make lifting and lowering movements through the base frame 22, and the hydraulic cylinder 3 can drive the entire mechanism to move back and forth in the horizontal direction. The entire mechanism is arranged under the thin box in front of the main unit of the molding section. Before the box is pushed, cylinder 4 controls the connecting rod 5 to lower the cleaning mechanism to the bottom position. Then, it drives the hydraulic cylinder 3 to push the mechanism out. After the box is pushed, cylinder 4 controls the connecting rod 5 to rise to the height of the box surface, and then the hydraulic cylinder 3 actively retracts to complete the scraping of the box surface. The scraping process is actively driven by the hydraulic cylinder 3, and the lifting and lowering movements are completed by cylinder 4 driving the connecting rod 5. The movement is stable and reliable, and it can complete the hanging and sweeping of the upper and lower box surfaces of different heights, thereby reducing the scrap rate caused by sand padding.

[0029] Two sets of parallel connecting rods 5 are provided on each side of the base frame 22. A limiting block 25 is also provided on the connecting plate 21 between the two sets of connecting rods 5. The limiting block 25 is connected to the bolt 27 by a fixed nut 26 to limit the swing angle of the connecting rod 5. The setting of two sets of connecting rods 5 on each side can not only improve the stability of the structure, but also reduce the safety risk caused by cylinder 4 failure by limiting the connection of bolt 27, making the mechanism more stable and reliable. At the same time, the thread adjustment of bolt 27 relative to nut 26 can also improve the overall adaptability of the mechanism.

[0030] The base frame 22 includes a set of crossbeams 221 for mounting the scraper blades 6 and side frames 222 mounted on both sides of the crossbeams 221.

[0031] Example 2

[0032] like Figure 3-7As shown, an active scraping mechanism with linkage lifting is further defined in this embodiment based on embodiment 1. The two ends of the crossbeam 221 are flexibly connected to the side frame 222. The side frame 222 is also equipped with a motor for driving the crossbeam 221 to rotate circumferentially. At least two sets of scraper blades 6 are provided and are evenly distributed around the crossbeam 221. The scraper blades 6 are detachably connected to the crossbeam 221. Therefore, after the top scraper blades 6 have been working for a certain period of time, the next set of scraper blades 6 can be rotated to the top by rotating the crossbeam 221 to continue the cleaning operation, thereby saving the time of maintenance and replacement of the scraper blades 6.

[0033] The scraper blade 6 includes a Z-shaped support plate 61 and a scraper blade body 62 installed on the top of the support plate 61. The support plate 61 is guided and connected to the guide post 63 fixed on the crossbeam 221. The crossbeam 221 is also provided with an insertion group 64 for positioning the guide post 63 through the support plate 61. That is, the scraper blade 6 and the crossbeam 221 can be detachably positioned by abutting the support plate 61 against the crossbeam 221, with the guide post 63 passing through the support plate 61, and the insertion group 64 passing through the support plate 61 and inserting the guide post 63. The installation and disassembly are relatively convenient.

[0034] The insertion group 64 includes two sets of insertion blocks 641 that are slidably mounted on the crossbeam 221 along the axial direction of the crossbeam 221. One end of the insertion block 641 is provided with an insertion rod 642, and the other end is connected to a compression spring 643. The end of the compression spring 643 presses against a set of positioning plates 644. The positioning plates 644 are fixed on the crossbeam 221 between the two sets of insertion blocks 641. The insertion rod 642 is inserted into the guide post 63 through the support plate 61 under the pressure of the compression spring 643.

[0035] On one side of the two sets of insert blocks 641 facing each other, there is a set of slots 645 and a set of insert posts 646. A set of sealing rods 647 are inserted through the side of the slots 645. The end of the sealing rod 647 is provided with an inclined surface 648 that mates with the conical surface of the end of the insert post 646. The side of the insert post 646 is also provided with a sealing groove 649 for insertion and positioning with the sealing rod 647. A set of frame bodies 6410 is provided on the insert blocks 641. The end of the sealing rod 647 is supported on the frame body 6410. A side stop 6411 is also provided on the sealing rod 647. A shaft 6412 that passes through the frame body 6410 is fixed on the side stop 6411. A compression spring 6413 that presses against the side stop 6411 and the frame body 6410 is also sleeved on the shaft 6412. A set of triangular blocks 6414 is also provided on the sealing rod 647.

[0036] The scraper blades 6 are provided in four sets, corresponding to the scraping station 100, dismantling station 200, unloading station 300, and installation station 400, respectively. The scraper blades 6 at the scraping station 100 are used for cleaning operations. At the dismantling station 200, the scraper blades 6 are aligned with a set of top blocks 500 driven by a top cylinder. The top cylinder is mounted on the molding section conveyor frame. The two sets of insert blocks 641 are also provided with inclined surfaces 6415 that converge towards the center. The block 500 is provided with a flared groove 600 that mates with the inclined surface 6415. When the scraper blade 6 to be replaced rotates to the disassembly station 200, the top cylinder drives the top block 500 to press against the two sets of insert blocks 641, causing the two sets of insert blocks 641 to move towards each other until the insert post 646 is inserted into the slot 645 and the sealing rod 647 is inserted into the sealing groove 649 under the pressure of the compression spring 6413. At this time, the insert rod 642 is disengaged from the guide post 63 and the support plate 61, and the scraper blade... When the scraper 6 rotates to the bottom unloading station 300, the support plate 61 drives the scraper 6 to fall freely from the guide post 63 under the action of gravity. A set of push blocks 700 is positioned at the installation station 400. The end of the push block 700 has an angled surface 800 that mates with the triangular block 6414. Driven by the push cylinder on the molding section conveyor frame, the push block 700 pushes the triangular block 6414, causing the support plate 6 corresponding to the new scraper 6 to... After the guide post 63 is introduced, the sealing rod 647 is disengaged from the sealing groove 649 by pushing the triangular block 6414. This causes the two sets of insert blocks 641 to spring open under the drive of the compression spring 643, so that the insert rod 642 passes through the support plate 61 and is inserted into the guide post 63. This allows the new scraper blade 6 to be positioned on the crossbeam 221. Thus, the maintenance and replacement of the scraper blade 6 can be completed automatically, which is not only more convenient, but also has a higher degree of automation and replacement and maintenance efficiency.

[0037] The working principle of this invention is as follows: The purpose of this invention is to provide an active scraping mechanism with a linkage lifting mechanism, which is arranged below the thin box in front of the main machine in the molding section. Before the box is pushed, the cylinder 4 controls the linkage 5 to lower the cleaning mechanism to the bottom position. Then, the hydraulic cylinder 3 drives the mechanism to push it out. After the box is pushed, the cylinder 4 controls the linkage 5 to rise to the height of the low box surface, and then the hydraulic cylinder 3 actively retracts to complete the scraping of the box surface. The scraping process is actively driven by the hydraulic cylinder 3, and the lifting action is completed by the cylinder 4 driving the linkage 5. The action is stable and reliable, and it can complete the scrapping of the upper and lower box surfaces at different heights, thereby reducing the scrap rate caused by sand padding.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An active scraping mechanism with linkage lifting, characterized in that, The system includes a movable guide frame, a hanging frame, a hydraulic cylinder, a pneumatic cylinder, connecting rods, and scraper blades. The upper and lower boxes are conveyed on the molding section conveyor frame. Two sets of movable guide frames are installed on the molding section conveyor frame via rollers. The two ends of the hanging frame are connected to the two sets of movable guide frames. The driving end of the hydraulic cylinder installed on the molding section conveyor frame is connected to the middle of the hanging frame. Connecting rods are also connected to both sides of the hanging frame via connecting plates. The ends of the connecting rods are connected to a set of base frames, and the two ends of the connecting rods are respectively rotatably installed to the connecting plate and the base frame via pins. Scraper blades are installed on the base frame to serve as a cleaning mechanism for scraping the lower box surface of the thin-walled box. A pneumatic cylinder is also hinged to the movable guide frame, and the driving end of the pneumatic cylinder is rotatably connected to the end of the base frame via a rotating shaft. The base frame includes a set of crossbeams for mounting the scraper blades and side frames mounted on both sides of the crossbeams. The two ends of the crossbeam are connected to the side frame. The side frame is also equipped with a motor for driving the crossbeam to rotate circumferentially. There are at least two sets of scraper blades, which are evenly distributed around the crossbeam circumferentially. The scraper blades are detachably connected to the crossbeam.

2. The active scraping mechanism with linkage lifting according to claim 1, characterized in that, Two sets of parallel connecting rods are provided on each side of the base frame. A limiting block is also provided on the connecting plate between the two sets of connecting rods. The limiting block is connected to the bolt by a fixed nut to limit the swing angle of the connecting rod.

3. The active scraping mechanism with linkage lifting according to claim 1, characterized in that, The scraper blade includes a Z-shaped support plate and a scraper blade body installed on top of the support plate. The support plate is guided and connected to a guide post fixed on a crossbeam. The crossbeam is also provided with an insert for positioning the guide post through the support plate.

4. The active scraping mechanism with linkage lifting according to claim 3, characterized in that, The insertion group includes two sets of insertion blocks that are slidably mounted on the crossbeam along the axial direction of the crossbeam. One end of each insertion block is provided with an insertion rod, and the other end is connected to a compression spring. The end of the compression spring presses against a set of positioning plates. The positioning plates are fixed on the crossbeam between the two sets of insertion blocks. The insertion rod is inserted into the guide post through the support plate under the pressure of the compression spring.

5. The active scraping mechanism with linkage lifting according to claim 4, characterized in that, The scraper blades are provided in two sets. When the scraper blades are driven by the motor to rotate to the bottom, the compression springs are compressed to disengage the insert rod from the guide post and the support plate, so as to complete the maintenance and replacement of the scraper blades.

6. The active scraping mechanism with linkage lifting according to claim 4, characterized in that, Two sets of insert blocks each have a set of slots and a set of posts on opposite sides. A set of sealing rods passes through the side of the slots. The end of the sealing rod has an inclined surface that mates with the conical surface of the end of the post. The side of the post also has a sealing groove for insertion and positioning with the sealing rod. A set of frames is provided on the insert blocks. The end of the sealing rod is supported on the frames. A side stop is also provided on the sealing rod. A shaft passing through the frame is fixed on the side stop. A compression spring is also sleeved on the shaft, pressing against the side stop and the frame. A set of triangular blocks is also provided on the sealing rod.

7. The active scraping mechanism with linkage lifting according to claim 6, characterized in that, The scraper blades are provided in four sets, corresponding to the scraping station, disassembly station, unloading station, and installation station, respectively. The scraper blades at the scraping station are used for cleaning. At the disassembly station, the scraper blades are aligned with a set of top blocks driven by a top cylinder, which is mounted on the molding section conveyor frame. Both sets of insert blocks are also provided with inclined surfaces that taper towards the center. The top blocks have flared grooves that mate with the inclined surfaces. When the scraper blade to be replaced rotates to the disassembly station, the top cylinder drives the top blocks to press against the two sets of insert blocks, causing them to move towards each other until the insert post is inserted into the slot, and the sealing rod is inserted into the sealing groove under the pressure of the compression spring. When the scraper blade rotates to the bottom of the unloading station, the support plate causes the scraper blade to fall freely from the guide post under the action of gravity. A set of push blocks is set at the installation station. The end of the push block is provided with an angled surface that cooperates with the triangular block. The push block pushes the triangular block under the drive of the push cylinder on the molding section conveyor frame. After the support plate corresponding to the new scraper blade is introduced into the guide post, the push triangular block drives the sealing rod to disengage from the sealing groove. Then, the two sets of plug blocks are sprung open under the drive of the compression spring to drive the plug rod to pass through the support plate and insert into the guide post, so as to realize the positioning of the new scraper blade on the crossbeam.

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