Liftable sand scraping mechanism

Abstract

The liftable sand scraping mechanism comprises a passive sand loosening mechanism and a passive sand scraping mechanism which are arranged side by side, the passive sand loosening mechanism is located at the front end of the running direction of a sand box, the passive sand scraping mechanism is located at the rear end of the running direction of the sand box, the passive sand loosening mechanism comprises a first vertical frame which is vertically arranged, and a first base is installed at the bottom of the first vertical frame; and a first lifting cylinder is mounted on the first base. A first base of the passive sand loosening mechanism is provided with a first tool apron frame through a first lifting cylinder, a vertical scraper used for crushing molding sand is installed on the first tool apron frame, a second tool apron frame is installed on a second base of the passive sand scraping mechanism through a second lifting cylinder, and a transverse scraper used for scraping the molding sand to be flat is installed on the second tool apron frame. The requirement for different heights of sand box protruding molding sand is met, castings of different types can be manufactured on the premise of no shutdown, the quality of sand scraping operation is effectively guaranteed, and the manufacturing efficiency of the whole production line can be improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of molding line equipment, in particular to a sand scraping mechanism which can be lifted and lowered. Background Art

[0002] The molding line is a mechanized equipment production line for batch production of castings. The production of castings is achieved through operations such as filling sand in the sand box, molding, closing the box, pouring and cooling, and sand falling. Different types of castings have different requirements on the height of the protruding sand in the sand box. During the molding process, a scraper is usually used to scrape and clean the protruding sand. The scrapers in the existing production lines are mostly fixed. When manufacturing the same type of batch of castings, the scraper can be adjusted to the appropriate position before the production line is operated. When the production line manufactures different types of castings, it is necessary to stop the machine and readjust the position of the scraper before producing another type of casting, which reduces the efficiency of the overall scraping operation to a certain extent. Utility Model Content

[0003] The utility model aims to provide a sand scraping mechanism which can be lifted and lowered, and realizes vertical adjustment of the vertical scraper and the horizontal scraper through a lifting cylinder, so as to adjust the cleaning height requirement of the protruding sand mold without stopping the machine, thereby solving the problems in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a liftable sand scraping mechanism comprises a passive sand loosening mechanism and a passive sand scraping mechanism arranged side by side, the passive sand loosening mechanism is located at the front end of the sand box running direction, and the passive sand scraping mechanism is located at the rear end of the sand box running direction, wherein the passive sand loosening mechanism comprises a vertically arranged first frame, a first base is installed at the bottom of the first frame, a first lifting cylinder is installed on the first base, a first tool holder frame is installed on the piston rod of the first lifting cylinder, a plurality of vertically arranged vertical scrapers are installed on the first tool holder frame, the passive sand scraping mechanism comprises a vertically arranged second frame, a second base is installed at the bottom of the second frame, a second lifting cylinder is installed on the second base, a second tool holder frame is installed on the piston rod of the second lifting cylinder, a second tool holder frame is installed on the second tool holder frame, an inclined horizontal scraper is installed on the second lifting cylinder, the first lifting cylinder can drive the vertical scraper to move vertically up and down, and the second lifting cylinder can drive the horizontal scraper to move vertically up and down. A first top beam is mounted on the piston rod of the first lifting cylinder, a first guide frame is provided on both sides of the first top beam, a first tool holder is mounted between the two first guide frames, a vertically arranged first guide rail is provided on the inner side of the first vertical frame, a first clamping wheel matched with the side surface of the first guide rail and a first guide wheel matched with the end surface of the first guide rail are mounted on the first guide frame. A second top beam is mounted on the piston rod of the second lifting cylinder, a second guide frame is provided on both sides of the second top beam, a second tool holder is mounted between the two second guide frames, a vertically arranged second guide rail is provided on the inner side of the second vertical frame, a second clamping wheel matched with the side surface of the second guide rail and a second guide wheel matched with the end surface of the second guide rail are mounted on the second guide frame. A connecting ring is mounted on the piston rod of the lifting cylinder, an earring seat matched with the connecting ring is provided at the bottom of the top beam, and a pin is matched and mounted between the connecting ring and the earring seat. An upper limit mechanism is provided at the top of the guide frame, and a lower limit mechanism is provided at the bottom of the guide frame. The upper limit mechanism includes an upper limit bolt threadedly engaged with the guide frame, and one end of the upper limit bolt passing downward out of the guide frame is equipped with an upper limit nut. The lower limit mechanism includes a lower limit bolt threadedly engaged with the base, and a lower limit nut is also equipped on the lower limit bolt, and the screw head of the lower limit bolt is located at the bottom of the guide frame. Two rows of vertical scrapers arranged front and back are installed on the first tool holder, and the vertical scrapers in the front and back rows are staggered. A locking bolt is installed on the second tool holder, and a long groove that cooperates with the locking bolt is opened on the horizontal scraper. An adjusting nut is installed at the lower part of the second tool holder, and an adjusting bolt is equipped in the adjusting nut. The end of the adjusting bolt contacts the bottom of the horizontal scraper. After loosening the locking bolt, rotating the adjusting bolt can push the horizontal scraper to move along the direction of the locking bolt.

[0005] The positive effect of the utility model is that the utility model describes a liftable sand scraping mechanism, comprising a passive sand loosening mechanism and a passive sand scraping mechanism arranged side by side, a first tool holder frame is installed on the first base of the passive sand loosening mechanism through a first lifting cylinder, a vertical scraper for crushing the molding sand is installed on the first tool holder frame, a second tool holder frame is installed on the second base of the passive sand scraping mechanism through a second lifting cylinder, a horizontal scraper for scraping the molding sand is installed on the second tool holder frame, the height adjustment of the passive sand loosening mechanism and the passive sand scraping mechanism can be automatically completed by two lifting cylinders, different height requirements of the sand box protruding from the molding sand can be achieved, different types of castings can be manufactured without stopping the machine, which not only effectively guarantees the quality of the sand scraping operation, but also can improve the production efficiency of the overall production line to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the utility model;

[0007] Figure 2 yes Figure 1 Middle AA section view;

[0008] Figure 3 yes Figure 1 Middle BB section view;

[0009] Figure 4 yes Figure 2 Middle CC section view;

[0010] Figure 5 yes Figure 2 Middle DD section view;

[0011] Figure 6 yes Figure 1 A partial enlarged view of middle I;

[0012] Figure 7 yes Figure 1 A partial enlarged view of II. DETAILED DESCRIPTION

[0013] The utility model discloses a sand scraping mechanism which can be lifted and lowered, such as Figure 1-3 As shown, it includes a passive sand loosening mechanism and a passive sand scraping mechanism arranged side by side. The passive sand loosening mechanism is located at the front end of the sand box running direction, and the passive sand scraping mechanism is located at the rear end of the sand box running direction. The passive sand loosening mechanism and the passive sand scraping mechanism are both located on the lower side of the sand box transport track, and are used to crush and scrape the sand mold protruding from the bottom of the sand box.

[0014] The passive sand loosening mechanism includes a vertically arranged first frame 1, a first base 2 is installed at the bottom of the first frame 1, a first lifting cylinder 3 is installed on the first base 2, a first tool holder frame 4 is installed on the piston rod of the first lifting cylinder 3, and a plurality of vertically arranged vertical scrapers 5 are installed on the first tool holder frame 4. The vertical scrapers 5 are relatively stationary, and the sand box moves on the transport track. The vertical scrapers 5 can crush the sand mold protruding from the bottom of the sand box under movement.

[0015] The passive scraping mechanism includes a vertically arranged second frame 6, a second base 7 is installed at the bottom of the second frame 6, a second lifting cylinder 8 is installed on the second base 7, a second tool holder frame 9 is installed on the piston rod of the second lifting cylinder 8, and an inclined horizontal scraper 10 is installed on the second tool holder frame 9. The horizontal scraper 10 is stationary relative to the transport track. When the sand box moves on the transport track, the horizontal scraper 10 can scrape the crushed sand mold at the bottom of the sand box.

[0016] The first lifting cylinder 3 can drive the vertical scraper 5 to move vertically up and down, and the second lifting cylinder 8 can drive the horizontal scraper 10 to move vertically up and down. Through the on-demand extension and retraction of the first lifting cylinder 3 and the second lifting cylinder 8, the height adjustment of the dynamic sand loosening mechanism and the passive sand scraping mechanism relative to the transport track can be automatically completed, and then the height requirement of the protruding sand mold of the sand box can be adjusted according to different types of castings.

[0017] Furthermore, in order to ensure the vertical movement stability of the vertical scraper 5 when the piston rod of the first lifting cylinder 3 is extended and retracted, a first top beam 11 is installed on the piston rod of the first lifting cylinder 3, and first guide frames 12 are provided on both sides of the first top beam 11, and the first knife support 4 is installed between the two first guide frames 12. Figure 4 and Figure 5 As shown, a vertically arranged first guide rail 13 is provided on the inner side of the first stand 1 , and a first clamping wheel 14 matched with the side surface of the first guide rail 13 and a first guide wheel 15 matched with the end surface of the first guide rail 13 are installed on the first guide frame 12 .

[0018] Furthermore, in order to ensure the vertical movement stability of the cross scraper 10 when the piston rod of the second lifting cylinder 8 is extended and retracted, a second top beam 16 is installed on the piston rod of the second lifting cylinder 8, and second guide frames 17 are provided on both sides of the second top beam 16, and the second knife holder frame 9 is installed between the two second guide frames 17. A vertically arranged second guide rail 18 is provided on the inner side of the second vertical frame 6, and a second clamping wheel 19 matched with the side surface of the second guide rail 18 and a second guide wheel 20 matched with the end surface of the second guide rail 18 are installed on the second guide frame 17.

[0019] The first clamping wheel 14 , the first guide wheel 15 and the first guide rail 13 cooperate to form a vertical guide for the vertical scraper 5 , and the second clamping wheel 19 , the second guide wheel 20 and the second guide rail 18 cooperate to form a vertical guide for the horizontal scraper 10 .

[0020] The clamping wheels and guide wheels are arranged side by side, with the clamping wheel or guide wheel on one side being a concentric roller and the clamping wheel or guide wheel on the other side being an eccentric roller. In the roller guide system, the concentric roller and the eccentric roller are used together, with the concentric roller acting as a positioning reference and the eccentric roller acting as a preload adjustment. The preload of the roller guide system is field adjustable and can be achieved with simple tools. By adjusting the position of the bearing center of the eccentric roller, the tightness or looseness of the contact between the roller and the guide rail can be controlled.

[0021] Furthermore, in order to realize the installation connection between the lifting cylinder and the top beam, as Figure 6 As shown, a connecting ring 21 is installed on the piston rod of the lifting cylinder, an earring seat 22 matching with the connecting ring 21 is provided at the bottom of the top beam, and a pin 23 is installed between the connecting ring 21 and the earring seat 22. The above structure allows the lifting cylinder to drive the top beam to rise and fall vertically while allowing a small angle of swing adjustment space between the top beam and the piston rod.

[0022] Furthermore, in order to achieve the vertical movement limit of the guide frames on both sides of the passive sand loosening mechanism and the passive sand scraping mechanism, an upper limit mechanism is provided at the top of the guide frame, and a lower limit mechanism is provided at the bottom of the guide frame. The upper limit mechanism includes an upper limit bolt 24 threadedly engaged with the guide frame, and one end of the upper limit bolt 24 that passes downward through the guide frame is equipped with an upper limit nut 25. Rotating the upper limit nut 25 releases the rotation lock on the upper limit bolt 24. Subsequent rotation of the upper limit bolt 24 can adjust its depth position in the screw hole of the guide frame, that is, the height position of the upper limit bolt 24 extending upward from the guide frame, and the screw head at the top of the upper limit bolt 24 can contact the transport track, thereby achieving the upward movement limit of the guide frame.

[0023] The lower limit mechanism includes a lower limit bolt 26 threadedly engaged with the base, and a lower limit nut 27 is also mounted on the lower limit bolt 26. The screw head of the lower limit bolt 26 is located at the bottom of the guide frame. Rotating the lower limit nut 27 can release the rotation lock of the lower limit bolt 26. The subsequent rotation of the lower limit bolt 26 can adjust its depth position in the screw hole of the base, that is, the height position of the lower limit bolt 26 extending upward from the base. The screw head of the lower limit bolt 26 contacts the bottom of the guide frame, thereby realizing the downward movement limit of the guide frame.

[0024] Furthermore, in order to achieve neat crushing of the protruding sand mold by the vertical scraper 5, two rows of vertical scrapers 5 arranged front and back are installed on the first knife holder 4, and the front and back rows of vertical scrapers 5 are staggered, which can perform preliminary cutting and crushing of the protruding sand mold of the sand box.

[0025] Furthermore, in order to facilitate the adjustment of the initial installation position of the cross scraper 10 on the second knife support 9, that is, the height position extending out of the second knife support 9, as shown in FIG. Figure 7 As shown, a locking bolt 28 is installed on the second tool holder 9, and a long groove 29 matching with the locking bolt 28 is opened on the cross scraper 10. By turning the locking bolt 28, the cross scraper 10 can be pressed and installed on the second tool holder 9.

[0026] An adjusting nut 30 is installed at the lower part of the second tool holder 9, and an adjusting bolt 31 is installed in the adjusting nut 30. The end of the adjusting bolt 31 contacts the bottom of the cross scraper 10. After loosening the locking bolt 28, rotating the adjusting bolt 31 can push the cross scraper 10 to move in the direction of the locking bolt 28, thereby realizing the extension height adjustment of the cross scraper 10 on the second tool holder 9.

[0027] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A sand scraping mechanism that can be raised and lowered, characterized in that: The invention comprises a passive sand loosening mechanism and a passive sand scraping mechanism arranged side by side, wherein the passive sand loosening mechanism is located at the front end of the sand box in the running direction, and the passive sand scraping mechanism is located at the rear end of the sand box in the running direction, wherein the passive sand loosening mechanism comprises a first vertical frame (1), a first base (2) is installed at the bottom of the first frame (1), a first lifting cylinder (3) is installed on the first base (2), a first tool support frame (4) is installed on the piston rod of the first lifting cylinder (3), and a plurality of vertically arranged vertical scrapers (5) are installed on the first tool support frame (4), and the passive sand scraping mechanism comprises a second vertical frame (6), a second base (7) is installed at the bottom of the second frame (6), a second lifting cylinder (8) is installed on the second base (7), a second tool support frame (9) is installed on the piston rod of the second lifting cylinder (8), and a tilted horizontal scraper (10) is installed on the second tool support frame (9), the first lifting cylinder (3) can drive the vertical scraper (5) to move vertically up and down, and the second lifting cylinder (8) can drive the horizontal scraper (10) to move vertically up and down.

2. The liftable sand scraping mechanism according to claim 1, characterized in that: A first top beam (11) is mounted on the piston rod of the first lifting cylinder (3), first guide frames (12) are provided on both sides of the first top beam (11), a first tool holder frame (4) is mounted between the two first guide frames (12), a vertically arranged first guide rail (13) is provided on the inner side of the first vertical frame (1), and a first clamping wheel (14) matched with the side surface of the first guide rail (13) and a first guide wheel (15) matched with the end surface of the first guide rail (13) are mounted on the first guide frame (12).

3. The liftable sand scraping mechanism according to claim 1, characterized in that: A second top beam (16) is mounted on the piston rod of the second lifting cylinder (8), second guide frames (17) are provided on both sides of the second top beam (16), the second tool holder frame (9) is mounted between the two second guide frames (17), a vertically arranged second guide rail (18) is provided on the inner side of the second vertical frame (6), and a second clamping wheel (19) matched with the side surface of the second guide rail (18) and a second guide wheel (20) matched with the end surface of the second guide rail (18) are mounted on the second guide frame (17).

4. A liftable sand scraping mechanism according to claim 2 or 3, characterized in that: A connecting ring (21) is installed on the piston rod of the lifting cylinder, an earring seat (22) matching with the connecting ring (21) is provided at the bottom of the top beam, and a pin shaft (23) is installed between the connecting ring (21) and the earring seat (22).

5. A liftable sand scraping mechanism according to claim 2 or 3, characterized in that: An upper limit mechanism is provided at the top of the guide frame, and a lower limit mechanism is provided at the bottom of the guide frame. The upper limit mechanism comprises an upper limit bolt (24) threadedly engaged with the guide frame, and one end of the upper limit bolt (24) passing downwardly out of the guide frame is cooperated with an upper limit nut (25). The lower limit mechanism comprises a lower limit bolt (26) threadedly engaged with the base, and a lower limit nut (27) is also cooperated with the lower limit bolt (26), and the screw head of the lower limit bolt (26) is located at the bottom of the guide frame.

6. The liftable sand scraping mechanism according to claim 1, characterized in that: Two rows of vertical scrapers (5) arranged front and back are mounted on the first blade support (4), and the vertical scrapers (5) in the front and back rows are arranged in a staggered manner.

7. The liftable sand scraping mechanism according to claim 1, characterized in that: A locking bolt (28) is installed on the second knife base frame (9), and a long groove (29) matching with the locking bolt (28) is opened on the cross scraper (10). An adjusting nut (30) is installed at the lower part of the second knife base frame (9), and an adjusting bolt (31) is installed in the adjusting nut (30). The end of the adjusting bolt (31) contacts the bottom of the cross scraper (10). After loosening the locking bolt (28), rotating the adjusting bolt (31) can push the cross scraper (10) to move along the direction of the locking bolt (28).

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