Foundry sand ton bag hydraulic lifting device with anti-interference and dustproof functions

Abstract

The invention provides a foundry sand ton bag hydraulic lifting device with anti-interference and dustproof functions, and belongs to the technical field of lifting devices, the foundry sand ton bag hydraulic lifting device comprises a lifting device body, a limiting assembly and a protection assembly; the lifting device body comprises a fixed base and a movable base, the movable base is longitudinally arranged on the fixed base in a sliding mode, and a lifting arm is horizontally arranged on one side of the movable base; a lifting driving mechanism is arranged on the fixed base, and the action end of the lifting driving mechanism is connected with the movable base; the limiting assembly comprises a limiting seat lapped on the lifting arm; the protection assembly comprises an annular support arranged on the outer side of the lifting driving mechanism in a covering mode and a flexible sleeve, and the flexible sleeve is arranged on the outer side of the annular support in a sleeving mode and fixedly connected with the annular support. According to the foundry sand ton bag hydraulic lifting device with the anti-interference and dustproof functions, the problem of mechanical interference caused by the fact that a traditional lifting device is not provided with an alignment mechanism is solved, and the integrity and operation safety of the ton bag are guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of lifting device technology, and more specifically, it relates to a hydraulic lifting device for a foundry sand ton bag with anti-interference and dust prevention functions. Background Technology

[0002] During the transfer of foundry sand, bulk loading, unloading, and transportation are mostly achieved using ton bags. Currently, for lifting operations of ton bags, the industry commonly uses equipment such as forklifts with attachments and fixed lifting mechanisms.

[0003] Existing lifting mechanisms typically have two parallel lifting arms, with flexible slings on both sides of the ton bag overlapping the two forks. However, existing lifting arms lack an alignment mechanism. Operators must visually observe the relative position of the ton bag and the platform and manually push the ton bag to center it. This is to prevent the ton bag from directly contacting the rigid components of the lifting mechanism during lifting, which could cause scratches, squeezing, or even snagging, potentially leading to ton bag damage, material leakage, or instability, among other safety hazards.

[0004] In addition, when lifting and transferring casting sand, there is a lot of dust and pollutants at the work site. These dust and pollutants will adhere to the surface of the exposed hydraulic cylinder piston rod. When the piston rod retracts into the cylinder, the dust will scratch the seals, contaminate the hydraulic oil, and cause system leakage, reduced efficiency, and significantly shorten the service life of the hydraulic cylinder. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic lifting device for casting sand ton bags with anti-interference and dust prevention functions, aiming to solve the problems of inaccurate positioning, mechanical interference and dust erosion of hydraulic cylinders during the lifting of casting sand ton bags.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a hydraulic lifting device for a foundry sand ton bag with anti-interference and dustproof functions, comprising: The lifting device body includes a fixed base and a movable base. The movable base is slidably mounted on the fixed base in the longitudinal direction. A lifting arm is horizontally arranged on one side of the movable base. At least one set of limiting components is arranged on the same lifting arm. A lifting drive mechanism is arranged on the fixed base, and the actuating end of the lifting drive mechanism is connected to the movable base. The limiting assembly includes a limiting seat that overlaps the lifting arm, and the limiting seat is provided with a limiting groove for placing the ton bag sling; The protective assembly includes an annular support and a flexible sleeve covering the outside of the lifting drive mechanism, the flexible sleeve being fitted over the outside of the annular support and fixedly connected to the annular support.

[0007] In another embodiment of this application, the flexible sleeve is a multi-layer composite structure, comprising nylon fabric and antistatic fabric distributed sequentially from the outside to the inside.

[0008] As another embodiment of this application, it also includes: The upper fixed end cap is located at the top of the lifting drive mechanism; The lower fixed end cap is located at the bottom end of the lifting drive mechanism; The two ends of the flexible sleeve are respectively connected to the upper fixed end cap and the lower fixed end cap.

[0009] In another embodiment of this application, the annular support is a helical elastic element.

[0010] In another embodiment of this application, the lifting arm is provided with at least one mounting position, and the limiting seat engages with the mounting position.

[0011] In another embodiment of this application, at least one mounting groove is provided on the lifting arm, the opening of the mounting groove faces upward, and the mounting groove forms the mounting position; The limiting seat is attached to the mounting groove.

[0012] As another embodiment of this application, it also includes: A shielding chain plate is provided at the lower part of the fixed base. The shielding chain plate is located on the front side of the fixed base and is slidably arranged along the height direction of the fixed base. The shielding chain plate is located below the movable base and is used to fit against the side wall of the ton bag.

[0013] In another embodiment of this application, the lifting arm is provided with a mounting cavity, and an adjustment assembly is provided inside the mounting cavity. The adjustment assembly includes: An adjustment seat is located below the lifting arm; The drive structure includes a pressure block and a rack; the pressure block is located in the mounting cavity and is slidably connected to the lifting arm along the longitudinal direction; the upper end surface of the pressure block is higher than the bottom of the mounting groove; the limiting seat is attached to the upper end surface of the pressure block; the rack is longitudinally located at the lower end of the pressure block; The gear assembly includes a rotating shaft, a driving gear, and a driven gear. The rotating shaft is rotatably mounted on the adjusting seat, and the axial direction of the rotating shaft is consistent with the width direction of the lifting arm. The driving gear and the driven gear are both sleeved on the rotating shaft, and the driving gear and the driven gear rotate synchronously. The driving gear meshes with the rack. A traction assembly connects the driven wheel and the shielding chain plate. The rotation of the driven wheel drives the traction assembly to pull the shielding chain plate upward.

[0014] In another embodiment of this application, the traction component includes: A rotating shaft is rotatably mounted on the adjusting seat; the rotating shaft is located on the other side of the rotating shaft. A traction gear is sleeved on the rotating shaft, and the traction gear meshes with the driven wheel; A rope roller is sleeved on the rotating shaft, and the rope roller is located on one side of the traction gear; the rope roller rotates synchronously with the traction gear; A flexible rope, one end of which is wound around the rope roller, and the other end is connected to the shielding chain plate; The rotation of the rope roller pulls the flexible rope upward, and the flexible rope causes the shielding chain plate to move upward.

[0015] In another embodiment of this application, sliding members are provided on both sides of the movable base along its length, and a longitudinal sliding groove is provided on the side frame of the fixed base, with the sliding members slidably disposed within the sliding groove.

[0016] The beneficial effects of the hydraulic lifting device for casting sand ton bags with anti-interference and dustproof functions provided by the present invention are as follows: Compared with the prior art, the hydraulic lifting device for casting sand ton bags with anti-interference and dustproof functions of the present invention continuously limits the lifting strap through the limiting groove during the entire lifting process, so as to prevent the ton bag from shifting due to the slippage of the lifting strap, thereby preventing the ton bag from scraping, squeezing or hooking with rigid components such as the lifting drive mechanism and the fixed base. It avoids the mechanical interference problem caused by the lack of alignment mechanism in traditional lifting devices, and ensures the integrity of the ton bag and the safety of operation. Meanwhile, the flexible sleeve of the protective component, supported by the ring support, always wraps around the lifting drive mechanism, isolating it from the external dusty environment. Foundry sand dust at the work site cannot come into contact with the surface of the lifting drive mechanism, preventing dust from adhering to the moving parts and scratching the seals or contaminating the hydraulic oil. This effectively solves the problem of dust erosion of the lifting drive mechanism, extends its service life, and ensures stable lifting efficiency. At the same time, the flexible sleeve of the protective component prevents direct contact between the ton bag and the lifting drive mechanism. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a hydraulic lifting device for a foundry sand ton bag with anti-interference and dustproof functions, provided in an embodiment of the present invention. Figure 2 For along Figure 1 Sectional view of line AA in the middle; Figure 3 For along Figure 1 Sectional view of the middle BB line; Figure 4 for Figure 3 Enlarged view at point M; Figure 5 This is a schematic diagram showing the arrangement of the lifting drive mechanism and protective components provided in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the positional relationship between the lifting arm and the pressure block provided in an embodiment of the present invention; Figure 7 This is a schematic diagram showing the positional relationship between the limiting seat and the lifting arm provided in an embodiment of the present invention; Figure 8 This is a schematic diagram showing the connection between the limiting seat and the lifting arm provided in an embodiment of the present invention.

[0019] In the diagram: 10. Fixed base; 11. Side frame; 12. Fixed arm; 13. Sliding groove; 14. Mounting platform; 20. Movable base; 21. Base plate; 22. Lifting arm; 23. Mounting slot; 24. Sliding component; 25. Connecting rod; 30. Lifting drive mechanism; 31. Flexible sleeve; 32. Chain; 33. Support rod; 34. Circular support; 35. Sprocket; 40. Adjusting assembly; 41. Pressure block; 42. Rack; 43. Adjusting seat; 44. Driven wheel; 45. Flexible rope; 46. Driving wheel; 47. Traction gear; 48. Rope roller; 50. Blocking chain plate; 51. Moving groove; 52. Sliding plate; 53. Chain plate body; 54. Elastic rope; 55. Sliding block; 60. Limiting component; 61. Limiting seat; 62. Extension arm; 63. Roller; 64. Limiting groove. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] Please see Figures 1 to 8The present invention provides a hydraulic lifting device for casting sand ton bags with anti-interference and dustproof functions. The hydraulic lifting device for casting sand ton bags with anti-interference and dustproof functions includes a lifting device body, limiting components 60, and protective components. The lifting device body includes a fixed base 10 and a movable base 20. The movable base 20 is longitudinally slidably disposed on the fixed base 10, and a lifting arm 22 is horizontally disposed on one side of the movable base 20. At least one set of limiting components 60 is disposed on the same lifting arm 22. A lifting drive mechanism 30 is disposed on the fixed base 10, and the actuating end of the lifting drive mechanism 30 is connected to the movable base 20. The limiting component 60 includes a limiting seat 61 overlapping the lifting arm 22, and a limiting groove 64 for placing the ton bag lifting strap is provided on the limiting seat 61. The protective components include an annular support 34 covering the outside of the lifting drive mechanism 30 and a flexible sleeve 31, the flexible sleeve 31 being sleeved on the outside of the annular support 34 and fixedly connected to the annular support 34.

[0022] The present invention provides a hydraulic lifting device for casting sand ton bags with anti-interference and dust prevention functions. The lifting device body consists of a fixed base 10, a movable base 20, a lifting arm 22 and a lifting drive mechanism 30. The fixed base 10 is set on the ground or a workbench. The movable base 20 is slidably mounted on the fixed base 10. The lifting arm 22 is set on one side of the movable base 10. During hoisting, the flexible sling of the ton bag is attached to the lifting arm 22.

[0023] The fixed end of the lifting drive mechanism 30 is mounted on the fixed base 10, and the movable end of the lifting drive mechanism 30 is connected to the movable base 20. It is used to drive the movable base 20 to move the lifting arm 22 and the ton bag longitudinally, so as to realize the lifting and transfer of the ton bag.

[0024] The limiting component 60 is provided on the lifting arm 22. The limiting component 60 includes a limiting seat 61 that overlaps on the lifting arm 22. A limiting groove 64 is provided at the upper end of the limiting seat 61. The flexible sling of the ton bag is installed in the limiting groove 64 to constrain the position of the flexible sling, limit the installation position of the flexible sling, and prevent its position from being too close to the lifting drive mechanism 30.

[0025] The protective components include annular support 34 and flexible sleeve 31. Both annular support 34 and flexible sleeve 31 are covered on the outside of lifting drive mechanism 30, and flexible sleeve 31 is fixedly connected to annular support 34 to form a protective structure for lifting drive mechanism 30.

[0026] When lifting the foundry sand ton bag, the operator first places the flexible slings on both sides of the ton bag into the limiting grooves 64 of the limiting component 60. The limiting grooves 64 position the slings, preventing them from shifting left or right on the lifting arm 22. This eliminates the need for manual visual inspection and adjustment of the ton bag's position, initially preventing positional deviations between the ton bag and other components of the equipment. Subsequently, the lifting drive mechanism 30 is activated, and its actuating end pushes the movable base 20 to slide longitudinally upward along the fixed base 10. The movable base 20 drives the lifting arm 22 and the ton bag to rise synchronously, completing the lifting operation.

[0027] The present invention provides a hydraulic lifting device for casting sand ton bags with anti-interference and dust prevention functions. Compared with the prior art, during the entire lifting process, the limiting component 60 continuously limits the lifting strap through the limiting groove 64 to prevent the ton bag from shifting due to the slippage of the lifting strap. This prevents the ton bag from scraping, squeezing or hooking with rigid components such as the lifting drive mechanism 30 and the fixed base 10. It avoids the mechanical interference problem caused by the lack of an alignment mechanism in traditional lifting devices, and ensures the integrity of the ton bag and the safety of operation. Meanwhile, the flexible sleeve 31 of the protective component, supported by the annular support 34, always wraps around the lifting drive mechanism 30, isolating the lifting drive mechanism 30 from the external dusty environment. Foundry sand dust at the work site cannot come into contact with the surface of the lifting drive mechanism 30, preventing dust from adhering to the moving parts of the lifting drive mechanism 30 and preventing dust from scratching the seals and contaminating the hydraulic oil as the moving parts move. This effectively solves the dust erosion problem of the lifting drive mechanism 30, extends its service life, and ensures stable lifting efficiency. At the same time, the flexible sleeve 31 of the protective component prevents the ton bag from directly contacting the lifting drive mechanism 30.

[0028] The lifting drive mechanism 30 is a hydraulic cylinder. The lower end of the hydraulic cylinder is the fixed end, which is connected to the fixed base 10; the upper end of the hydraulic cylinder is the actuating end, which is connected to the movable base 20.

[0029] A mounting platform 14 is provided on the fixed base 10. The lifting drive mechanism 30 is longitudinally mounted on the mounting platform 14, and a transverse support rod 33 is provided at the upper end of the lifting drive mechanism 30. Both ends of the support rod 33 are rotatably equipped with sprockets 35. A chain 32 passes over the sprockets 35 and engages with the sprockets 35. One end of the same chain 32 is connected to the mounting platform 14, and the other end is connected to the movable base 20.

[0030] The movable base 20 has a horizontal connecting rod 25 on the side away from the lifting arm 22, and the chain 32 is fixed to the connecting rod 25.

[0031] When the lifting drive mechanism 30 is activated and extends upward, it pushes the support rod 33 to rise synchronously. The support rod 33 drives the sprockets 35 at both ends to move upward. At this time, the chain 32, which is engaged with the sprockets 35, is subjected to an upward traction force. Since one end of the same chain 32 is fixed on the mounting platform 14, the chain 32, guided by the sprockets 35, transmits the traction force to the movable base 20 connected to the other end, thereby pulling the movable base 20 to slide upward longitudinally along the fixed base 10. When the lifting drive mechanism 30 retracts, the support rod 33 drives the sprockets 35 to move downward, and the chain 32 rotates accordingly. Under the action of gravity, the movable base 20 moves downward and tensions the chain 32 in real time until the movable base 20 returns to its original position.

[0032] Sliding members 24 are provided on both sides of the movable base 20 along its length. The side frame 11 of the fixed base 10 is provided with a longitudinal sliding groove 13, and the sliding members 24 are slidably disposed in the sliding groove 13.

[0033] The movable base 20 includes a base plate 21, which is attached to one side of the fixed base 10. A lifting arm 22 is provided on one side of the base plate 21, and a support arm is provided on the other side. A sliding member 24, such as a guide wheel, is provided at the end of the support arm. A longitudinal sliding groove 13 is formed on the fixed base 10, and the sliding member 24 is installed in the sliding groove and slides in cooperation with the sliding groove 13. A support rod 33 is horizontally connected to the support arms at both ends of the movable base 20. Under the traction of the chain 32, the support rod 33 and the base plate 21 slide up and down simultaneously along the sliding groove 13.

[0034] In some possible embodiments, the flexible sleeve 31 is a multi-layer composite structure, comprising nylon fabric and antistatic fabric distributed sequentially from the outside to the inside.

[0035] The outer nylon fabric has high strength and abrasion resistance, which can directly resist physical scratches in the external environment, such as accidental contact or friction between the edge of the ton bag and other equipment parts on site during lifting operations, to prevent the flexible sleeve 31 from being damaged by external scratches and to ensure the structural integrity of the flexible sleeve 31; the inner antistatic fabric has antistatic properties, which can prevent dust from being adsorbed on the inner wall of the flexible sleeve 31 due to static electricity. At the same time, its fabric structure can further enhance the sealing of the flexible sleeve 31 and reduce the possibility of dust seeping in from the gaps of the flexible sleeve 31.

[0036] Antistatic fabrics, such as conductive yarn fabrics, have conductive yarns mainly woven into the back of the fabric to improve its appearance and smoothness. The back of the fabric is a semiconductor, while the front is an insulator.

[0037] In some possible embodiments, please refer to Figure 5A hydraulic lifting device for a casting sand ton bag with anti-interference and dustproof functions also includes an upper fixed end cover and a lower fixed end cover. The upper fixed end cover is located at the top of the lifting drive mechanism 30; the lower fixed end cover is located at the bottom of the lifting drive mechanism 30; and the two ends of the flexible sleeve 31 are respectively connected to the upper fixed end cover and the lower fixed end cover.

[0038] The upper fixed end cap is fixed to the top of the lifting drive mechanism 30 (such as a hydraulic cylinder), and the lower fixed end cap is fixed to the bottom of the lifting drive mechanism 30 (such as a hydraulic cylinder). After the two ends of the flexible sleeve 31 are connected to the upper fixed end cap and the lower fixed end cap respectively, a closed space is formed between the flexible sleeve 31 and the lifting drive mechanism 30, which completely isolates the external dust environment.

[0039] When the lifting drive mechanism 30 is working, the moving part at its top will drive the upper fixed end cover to move synchronously. The upper fixed end cover will then pull the flexible sleeve 31 to expand or contract accordingly, while the lower fixed end cover remains fixed, providing stable bottom support for the flexible sleeve 31. During this process, the connection points between the two ends of the flexible sleeve 31 and the upper and lower fixed end covers always remain tightly fitted, and no gaps will appear due to the expansion and contraction of the flexible sleeve 31, effectively preventing dust from seeping in from the connection points at both ends of the flexible sleeve 31.

[0040] Optionally, both the upper and lower fixed end caps can adopt a flange structure.

[0041] In some possible embodiments, the annular support 34 is a helical elastic element.

[0042] The annular support 34, serving as the internal support structure of the flexible sleeve 31, is tightly connected to the flexible sleeve 31. When the lifting drive mechanism 30 operates, causing the flexible sleeve 31 to unfold or retract, the spiral elastic element will expand and contract synchronously with the movement of the flexible sleeve 31. During the unfolding process of the flexible sleeve 31, the spiral elastic element is stretched, and its elastic force assists the flexible sleeve 31 in unfolding smoothly, preventing the flexible sleeve 31 from wrinkling or getting stuck due to its own weight or external resistance. During the retraction process of the flexible sleeve 31, the spiral elastic element retracts and resets, causing the flexible sleeve 31 to fold evenly, preventing structural damage or sealing failure caused by uneven folding of the flexible sleeve 31. At the same time, the spiral structure ensures that the supporting force of the annular support 34 on the flexible sleeve 31 is evenly distributed, ensuring that the flexible sleeve 31 maintains a stable shape throughout its entire length, preventing local collapse of the flexible sleeve 31 that could lead to dust entry or affect the movement of the lifting drive mechanism 30.

[0043] Optionally, a spring can be selected as the elastic element. The spring is located inside the flexible sleeve 31 and is fixedly connected to the flexible sleeve 31, such as by bonding.

[0044] In some possible embodiments, please refer to Figure 7 , Figure 8The lifting arm 22 is provided with at least one mounting position, and the limiting seat 61 is engaged with the mounting position.

[0045] Based on the actual operational requirements such as the size of the ton bag and the spacing of the slings, the operator can select a suitable installation position to install the limiting seat 61. The limiting seat 61 is fixed on the lifting arm 22 by snap-fit, and then the ton bag sling is placed into the limiting groove 64 of the limiting seat 61.

[0046] During lifting, the limiting seat 61 remains fixed to the lifting arm 22 via a snap-fit ​​structure, preventing displacement due to the weight of the ton bag or its inertia. This continuously and stably limits the sling, preventing slippage and ton bag displacement. When it is necessary to change to a different ton bag or adjust operational requirements, the operator can easily disassemble the limiting seat 61 and reinstall it in another suitable mounting position without requiring structural modifications to the lifting arm 22.

[0047] The limiting seat 61 is an inverted U-shaped structure, with its open end engaging at the mounting position. The limiting seat 61 includes a base and two extension arms 62. The base overlaps the mounting position, and the two extension arms 62 extend downwards. Rollers 63 are provided at the lower ends of the extension arms 62, and the rollers 63 fit against the side of the lifting arm 22. The axial direction of the rollers 63 is consistent with the length direction of the lifting arm 22.

[0048] In some possible embodiments, please refer to Figure 2 ... Figure 3 and Figure 6 The lifting arm 22 has at least one mounting groove 23 with the groove opening facing upward, and the mounting groove 23 forms a mounting position; the limiting seat 61 overlaps in the mounting groove 23.

[0049] The mounting slot 23 serves as the mounting position. With the slot opening of the mounting slot 23 facing upward, it cooperates with the inverted U-shaped structure of the limiting seat 61 to form a fixed method of mutual interlocking and snapping.

[0050] During lifting, the weight of the ton bag is transferred to the limiting seat 61 via the flexible slings. The limiting seat 61 overlaps within the mounting slot 23, and the bottom of the mounting slot 23 provides stable support for the limiting seat 61, ensuring that the limiting seat 61 will not experience longitudinal displacement or detachment due to force. Furthermore, the multiple mounting slots 23 allow operators to select the appropriate slot 23 to install the limiting seat 61 based on the spacing of the flexible slings of the ton bag, further improving the positioning accuracy of the limiting component 60 and ensuring that the slings accurately align with the limiting position, preventing the ton bag from shifting due to limiting deviations.

[0051] In some possible embodiments, please refer to Figures 1 to 4The hydraulic lifting device for casting sand ton bags with anti-interference and dust prevention functions also includes a shielding chain plate 50. The shielding chain plate 50 is located at the lower part of the fixed base 10, at the front side of the fixed base 10, and slides along the height direction of the fixed base 10. The shielding chain plate 50 is located below the movable base 20 and is used to fit against the side wall of the ton bag.

[0052] The blocking chain plate 50 includes a sliding plate 52 and a chain plate body 53.

[0053] Two symmetrical fixing arms 12 are connected to the lower end of the fixed base 10. Positioning grooves are formed on the inner side of each fixing arm 12, and a blocking chain plate 50 is located within these grooves, allowing it to move along the length of the grooves. An opening is provided at the upper end of the fixing arm 12 on the side closest to the fixed base 10, and the chain plate body 53 of the blocking chain plate 50 extends from this opening. The blocking chain plate 50 comprises multiple hinged plates.

[0054] The sliding plate 52 is slidably mounted on the side frame 11 of the fixed base 10, and the sliding plate 52 is parallel to the movable base 20. The sliding plate 52 is hinged to the chain plate body 53.

[0055] When the sliding plate 52 moves upward along the side plate of the fixed base 10 under the pull of an external force, it drives the hinged chain plate body 53 to extend out of the positioning groove in sequence.

[0056] Optionally, the tail end of the chain plate body 53 is connected to the tail end of the positioning groove via an elastic rope 54. Under the dual traction of the sliding plate 52 and the elastic rope 54, the chain plate body 53 can move horizontally out of or into the positioning groove.

[0057] The fixed base 10 includes two symmetrical side frames 11. The length of the sliding plate 52 is greater than the horizontal gap between the two side frames 11, and the length of the chain plate body 53 is greater than the horizontal gap between the two side frames 11. The shielding chain plate 50 is always located on the side of the side frame 11 closest to the ton bag to prevent the ton bag from contacting the side frame 11.

[0058] A guide rail or a moving groove 51 is provided on the end face of the side frame 11, and a slider 55 is provided on the sliding plate 52. The slider 55 slides in cooperation with the guide rail or the moving groove 51.

[0059] After the ton bag is placed on the lifting arm 22, the shielding chain plate 50 is located below the ton bag. During the lifting process, as the movable base 20 drives the lifting arm 22 and the ton bag to rise, the shielding chain plate 50 can slide upward along the height direction on the fixed base 10, always adhering to the side wall of the ton bag. The shielding chain plate 50 provides lateral support to the side wall of the ton bag, which can limit the lateral sway of the ton bag and prevent the ton bag from shifting left or right due to vibration or inertia during the lifting process, thereby preventing the ton bag from contacting rigid components such as the fixed base 10 and the lifting drive mechanism 30. At the same time, the shielding chain plate 50 can also block direct friction between the side wall of the ton bag and the fixed base 10, reduce wear on the side wall of the ton bag, and ensure the integrity of the ton bag.

[0060] In some possible embodiments, please refer to Figure 1 , Figure 3 , Figure 7 and Figure 8 The lifting arm 22 has a mounting cavity, and an adjustment assembly 40 is installed inside the mounting cavity. The adjustment assembly 40 includes an adjustment seat 43, a drive structure, a gear assembly, and a traction assembly. The adjustment seat 43 is located below the lifting arm 22. The drive structure includes a pressure block 41 and a rack 42. The pressure block 41 is located inside the mounting cavity and is slidably connected to the lifting arm 22 longitudinally. The upper end face of the pressure block 41 is higher than the bottom of the mounting groove 23. The limiting seat 61 is attached to the upper end face of the pressure block 41. The rack 42 is longitudinally... The gear assembly includes a rotating shaft, a driving wheel 46, and a driven wheel 44. The rotating shaft is rotatably mounted on the adjusting seat 43, and the axial direction of the rotating shaft is consistent with the width direction of the lifting arm 22. The driving wheel 46 and the driven wheel 44 are both sleeved on the rotating shaft, and the driving wheel 46 and the driven wheel 44 rotate synchronously. The driving wheel 46 meshes with the rack 42. The traction assembly connects the driven wheel 44 and the blocking chain plate 50. The rotation of the driven wheel 44 drives the traction assembly to pull the blocking chain plate 50 upward.

[0061] The lifting arm 22 is U-shaped, with a closed end at the free end and an installation cavity formed between the two arms of the lifting arm 22.

[0062] After the sling for the ton bag is placed into the limiting slot 64, the weight of the ton bag is transferred to the pressure block 41 through the limiting seat 61. Under the action of gravity, the pressure block 41 slides downward along the longitudinal direction of the lifting arm 22, and the pressure block 41 drives the rack 42 at the lower end to move downward synchronously. Since the drive wheel 46 meshes with the rack 42, the downward movement of the rack 42 will drive the drive wheel 46 to rotate. The drive wheel 46 drives the driven wheel 44 to rotate synchronously through the rotating shaft. When the driven wheel 44 rotates, it drives the traction assembly to move. The traction assembly pulls the shielding chain plate 50 upward, so that the shielding chain plate 50 is in contact with the side wall of the ton bag.

[0063] When the weight inside the ton bag increases, the shielding chain plate 50 is pulled out, and the shielding chain plate 50 forms a vertical or inclined plate structure under the traction action, which blocks between the ton bag and the fixed base 10, preventing the ton bag from approaching the fixed base 10 when its shape changes.

[0064] In addition, as the lifting arm 22 lifts the ton bag, the pressure of the ton bag on the pressure block 41 continues, the pressure block 41 remains in a downward state, the rack 42 continues to drive the gear assembly to rotate, and the traction assembly continues to pull the shielding chain plate 50 to slide upward, ensuring that the shielding chain plate 50 is always in contact with the side wall of the ton bag, and providing lateral restraint to the ton bag in real time.

[0065] When the ton bag is lowered or unloaded, the pressure on the pressure block 41 disappears. Under the gravity of the shielding chain plate 50, the driven wheel 44 is driven to rotate in the opposite direction, which in turn drives the driving wheel 46 to rotate in the opposite direction, and the rack 42 moves in the opposite direction, finally causing the pressure block 41 to reset.

[0066] In some possible embodiments, please refer to Figure 3 The traction assembly includes a rotating shaft, a traction gear 47, a rope roller 48, and a flexible rope 45. The rotating shaft is rotatably mounted on an adjusting seat 43 and is located on the other side of the rotating shaft. The traction gear 47 is sleeved on the rotating shaft and meshes with the driven wheel 44. The rope roller 48 is sleeved on the rotating shaft and is located on one side of the traction gear 47. The rope roller 48 rotates synchronously with the traction gear 47. One end of the flexible rope 45 is wound around the rope roller 48, and the other end is connected to the shielding chain plate 50. The rotation of the rope roller 48 pulls the flexible rope 45 upward, and the flexible rope 45 drives the shielding chain plate 50 to move upward.

[0067] The adjusting seat 43 includes a plate longitudinally disposed at the lower end of the lifting arm 22. The adjusting seat 43 is bolted to the lifting arm 22, and multiple bolt holes are provided on the lifting arm 22 so that the adjusting seat 43 can be installed in different positions. Both the rotating shaft and the rotary shaft are mounted on the adjusting seat 43 by means of bearings.

[0068] When it is necessary to change to a different installation position, remove the entire adjustment seat 43, which contains the traction component and adjustment component 40, and then reinstall it under the corresponding installation position. Manually adjust the flexible rope 45 to the appropriate length.

[0069] During the lifting of the ton bag, when the driven wheel 44 of the gear assembly rotates, the driven wheel 44 drives the traction gear 47 to rotate because the traction gear 47 meshes with the driven wheel 44. The traction gear 47 drives the rope roller 48 to rotate synchronously through the rotating shaft. When the rope roller 48 rotates, it winds the flexible rope 45 around the roller body. The flexible rope 45 is tightened and generates an upward pulling force, which in turn pulls the shielding chain plate 50 connected to the other end of the flexible rope 45 to move upward along the height direction of the fixed base 10, so as to achieve the contact between the shielding chain plate 50 and the side wall of the ton bag.

[0070] When the ton bag is unloaded, the shielding chain plate 50 slides down and resets under its own weight, which drives the flexible rope 45 to make the rope roller 48 rotate in the opposite direction. As a result, the traction gear 47, driven wheel 44, and driving wheel 46 all rotate in the opposite direction, and then the rack 42 and pressure block 41 move in the opposite direction and reset.

[0071] The rope roller 48 converts the rotational motion into the linear traction motion of the flexible rope 45 by winding the flexible rope 45, which can smoothly pull the shielding chain plate 50 to move and avoid jamming or damage caused by uneven force on the shielding chain plate 50. The flexible rope 45 has good flexibility and strength, can adapt to the sliding trajectory of the shielding chain plate 50, and bear the weight and traction force of the shielding chain plate 50.

[0072] Optionally, a pulley is also provided on the substrate 21, and the flexible rope 45 passes around the pulley to change its extension direction, so that one end of the flexible rope 45 extends horizontally to the rope roller 48, and the other end extends vertically to connect to the sliding plate 52.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions, characterized in that, The utility model relates to a lifting device, which comprises a fixed base (10) and a movable base (20) longitudinally sliding on the fixed base (10), one side of the movable base (20) horizontally provided with a lifting arm (22), at least one set of limiting components (60) provided on the lifting arm (22), a lifting drive mechanism (30) provided on the fixed base (10), the action end of the lifting drive mechanism (30) connected with the movable base (20). The limiting component (60) comprises a limiting seat (61) overlapped on the lifting arm (22), and a limiting groove (64) for placing a ton bag sling is provided on the limiting seat (61). The protective component comprises a ring-shaped support (34) covering the outside of the lifting drive mechanism (30) and a flexible sleeve (31) sleeved on the outside of the ring-shaped support (34) and fixedly connected with the ring-shaped support (34). The flexible sleeve (31) is a multi-layer composite structure, and comprises nylon cloth and anti-static fabric distributed in sequence from outside to inside.

2. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 1, characterized in that, The utility model further comprises:

3. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 1, characterized in that, an upper fixed end cover arranged at the top end of the lifting drive mechanism (30); a lower fixed end cover arranged at the bottom end of the lifting drive mechanism (30); the two ends of the flexible sleeve (31) are connected with the upper fixed end cover and the lower fixed end cover respectively. The ring-shaped support (34) is a spiral elastic member.

4. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 1, characterized in that, At least one mounting position is provided on the lifting arm (22), and the limiting seat (61) is clamped and matched with the mounting position.

5. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 1, characterized in that, At least one mounting groove (23) is formed on the lifting arm (22), the groove opening of the mounting groove (23) faces upwards, and the mounting groove (23) forms the mounting position.

6. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 5, characterized in that, The limiting seat (61) is overlapped in the mounting groove (23). The utility model further comprises:

7. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 6, characterized in that, a shielding chain plate (50) arranged at the lower part of the fixed base (10), the shielding chain plate (50) is located at the front side of the fixed base (10), the shielding chain plate (50) is slidingly arranged along the height direction of the fixed base (10), and the shielding chain plate (50) is located below the movable base (20) and used for being attached to the side wall of a ton bag. An installation cavity is provided on the lifting arm (22), and an adjusting component (40) is arranged in the installation cavity.

8. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 7, characterized in that, The adjusting component (40) comprises: an adjusting seat (43) arranged below the lifting arm (22); a drive structure comprising a pressing block (41) and a rack (42), the pressing block (41) is located in the installation cavity, the pressing block (41) is longitudinally slidingly connected with the lifting arm (22), the upper end surface of the pressing block (41) is higher than the groove bottom of the mounting groove (23), the limiting seat (61) is attached to the upper end surface of the pressing block (41), and the rack (42) is longitudinally arranged at the lower end of the pressing block (41). Gear assembly, comprising a rotating shaft, a driving wheel (46) and a driven wheel (44), the rotating shaft is rotatably arranged on the adjusting base (43), the axial direction of the rotating shaft is consistent with the width direction of the lifting arm (22); the driving wheel (46) and the driven wheel (44) are sleeved on the rotating shaft, and the driving wheel (46) rotates synchronously with the driven wheel (44), the driving wheel (46) is engaged with the rack (42); Traction assembly, connecting the driven wheel (44) and the shielding chain plate (50), the driven wheel (44) rotates to drive the traction assembly to move the shielding chain plate (50) upward.

9. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 8, characterized in that, The traction assembly comprises: A rotating shaft is rotatably arranged on the adjusting base (43); the rotating shaft is located on the other side of the rotating shaft; A traction gear (47) is sleeved on the rotating shaft, the traction gear (47) is engaged with the driven wheel (44); A rope roller (48) is sleeved on the rotating shaft, the rope roller (48) is located on one side of the traction gear (47); the rope roller (48) rotates synchronously with the traction gear (47); A flexible rope (45) is wound around the rope roller (48) at one end, and is connected to the shielding chain plate (50) at the other end; The rope roller (48) rotates to drive the flexible rope (45) to move upward, and the flexible rope (45) drives the shielding chain plate (50) to move upward.

10. The cast sand ton bag hydraulic lifting device with anti-interference and dustproof functions according to claim 8, characterized in that, The two sides of the length direction of the movable base (20) are provided with sliding members (24), the side frame (11) of the fixed base (10) is provided with a longitudinal sliding groove (13), and the sliding members (24) are slidably arranged in the sliding groove (13).

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