Transfer trolley capable of rapidly ascending and descending

Abstract

The invention relates to the technical field of material transfer equipment, and discloses a transfer trolley capable of ascending and descending quickly, which comprises a base for providing bottom supporting and moving functions, an ascending and descending panel for bearing transferred articles and a secondary ascending and descending mechanism for realizing secondary height adjustment, and is characterized in that the base is formed by welding Q235 steel plates; the two sides of the base are movably connected with moving wheels through bolts. According to the cross type lifting connecting frame and bilateral symmetrical supporting design, the high-strength base and the high-strength lifting panel are matched, the bearing stability of the trolley is remarkably improved, the bearing weight can reach 500 kg, materials do not shake in the lifting process, the material dumping risk is effectively reduced, and the trolley is particularly suitable for transferring heavy materials or precision parts.

Description

Technical Field

[0001] This invention relates to the field of material handling equipment technology, specifically to a transfer trolley that can be quickly lifted and lowered. Background Technology

[0002] In industrial production and logistics, transfer trolleys are indispensable equipment. Their core function is to achieve efficient short-distance material handling and height adaptation, facilitating loading, unloading, docking, and stacking of materials. Currently available transfer trolleys have several shortcomings: First, their lifting functions are limited, often employing a single hydraulic or mechanical lifting structure, resulting in slow lifting speeds and insufficient height adjustment precision, making it difficult to accurately match workbenches, shelves, or conveyor lines of different heights. Second, their load-bearing stability is poor; lifting mechanisms are often single-sided supports or simple linkage structures, making materials prone to swaying after placement, especially posing a risk of tipping over during lifting. Third, their adaptability is insufficient; they cannot fine-tune height according to material size, weight, and operating environment, leading to inconvenience in loading and unloading and impacting operational efficiency. Fourth, it is difficult to balance mobility and structural strength; some trolleys use lightweight materials for flexibility, resulting in limited load-bearing capacity, while high-strength trolleys are cumbersome to move. Fifth, they lack cushioning and shock absorption designs, making materials susceptible to damage from vibration during transfer and lifting, especially unsuitable for transporting fragile items or precision parts.

[0003] Therefore, there is an urgent need for a transfer trolley with rapid lifting, precise fine-tuning, stable load-bearing capacity, flexible movement, and buffer protection functions to solve the above-mentioned problems of existing technologies and improve the efficiency and safety of material transfer. Summary of the Invention

[0004] The purpose of this invention is to provide a rapidly lifting and lowering transfer trolley that solves the above-mentioned technical problems. Through a two-stage lifting structure design of "hydraulic main lifting + servo motor secondary fine adjustment", combined with cross-type frame support, limit guidance and buffer shock absorption mechanism, it can achieve rapid lifting and lowering of materials, precise height adaptation, stable load bearing and safe transfer, while taking into account mobility and structural strength, improving work efficiency and material transfer safety.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a transfer trolley that can be quickly raised and lowered, comprising a base providing bottom support and mobility, a lifting panel for carrying the transferred items, and a secondary lifting mechanism for secondary height adjustment. The base is welded from Q235 steel plate, and movable wheels are movably connected to both sides of the base by bolts. The secondary lifting mechanism includes an L-shaped fixed panel that is bolted to both sides of the top of the lifting panel. The fixed panel is made of bent steel plate. A motor base is fixedly installed on the inner side of the vertical section by welding. A drive motor, which is a servo motor, is bolted to the motor base. Its output end is fixedly connected to a threaded connecting shaft through a coupling. A threaded slider is threaded to the outer wall of the threaded connecting shaft. The threaded slider has an internal threaded hole that matches the threaded connecting shaft.

[0006] Preferably, a sliding seat is fixedly installed on one side of the top of the base by welding, the sliding seat has a rectangular sliding groove inside, and the inner wall of the sliding groove is coated with a wear-resistant coating; two symmetrically arranged lower connecting protrusions are fixedly installed on the other side of the top of the base by welding, and pin holes are opened at the top.

[0007] Preferably, two symmetrical sliding wheels are slidably connected within the rectangular sliding groove of the sliding seat. The sliding wheels are deep groove ball bearing pulleys with an inner diameter that matches the connecting shaft. A connecting shaft is fixedly connected between the sliding wheels and between the lower connecting protrusions by a pin. A connecting block is fixedly connected to the middle of the outer wall of the connecting shaft by welding. A connecting seat is movably connected to the top of the connecting block by a pin. The connecting seat is fixedly installed at the bottom of the cylinder body of the hydraulic lifting cylinder by bolts.

[0008] Preferably, the lifting panel is made of stainless steel plate, has a rectangular structure, and its length is the same as that of the base. The surface is polished. Two symmetrical upper connecting bosses are fixedly connected to one side of the bottom of the lifting panel by welding. The structure and size of the upper connecting bosses are the same as those of the lower connecting bosses. A convex plate is integrally formed and connected to the other side of the bottom of the lifting panel. Two symmetrical bearing seats are fixedly installed on the inner wall of the convex plate by bolts.

[0009] Preferably, another set of connecting shafts is fixedly connected between the upper connecting bosses and between the bearing seats by pins, and two sets of symmetrical cross-type lifting frames are movably connected between the two sets of connecting shafts; the cross-type lifting frame is composed of multiple stainless steel lifting rods that are cross-hinged, and a connecting rod is fixedly connected to the middle position of the two sets of cross-type lifting frames by pins; the telescopic end of the hydraulic lifting cylinder is fixed to the middle of the connecting rod by pins.

[0010] Preferably, a limiting slide rail is also fixedly installed on the inner side of the vertical section of the fixed panel by bolts. The limiting slide rail is a rectangular aluminum profile slide rail with a length consistent with the threaded connecting shaft. The inner groove of the slide rail slides in cooperation with the side of the threaded slider to ensure that the threaded slider rises and falls smoothly.

[0011] Preferably, a connecting plate is fixedly installed on the side of the threaded slider by bolts. The connecting plate is made of stainless steel, and a buffer pad is fixedly installed on the bottom of the connecting plate by adhesive. The buffer pad is made of rubber and serves to buffer and reduce shock.

[0012] Preferably, connecting brackets are fixedly installed on both sides of the connecting plate by welding, and the bottom of the two sets of connecting brackets are fixedly connected to the transfer storage box by bolts; the transfer storage box is a rectangular box made of stainless steel and is located on both sides of the lifting panel.

[0013] This invention provides a transfer trolley that can be quickly raised and lowered. It has the following beneficial effects: 1. This invention adopts a two-stage lifting structure of "hydraulic main lifting + servo motor secondary fine adjustment". The hydraulic lifting cylinder drives the cross-type connecting frame to achieve rapid lifting (speed 50mm / s). The servo motor, in conjunction with the screw transmission, achieves precise fine adjustment within a range of ±50mm, with an adjustment accuracy of up to 0.1mm. This not only solves the problem of slow lifting speed of traditional trolleys, but also makes up for the lack of precision of single lifting structures, and can accurately match different working scenarios at different heights.

[0014] 2. The cross-type lifting frame and double-sided symmetrical support design of this invention, combined with a high-strength base and lifting panel, significantly improves the load-bearing stability of the trolley, with a load capacity of up to 500kg. The material does not shake during the lifting process, effectively reducing the risk of material tipping over. It is especially suitable for the transfer of heavy materials or precision parts.

[0015] 3. The mobile wheels of this invention adopt a design of mobile wheels + brakes, which takes into account both mobility and operational stability. The trolley can move flexibly in workshops, warehouses and other scenarios. During operation, it is fixed by brakes to prevent slippage. The base and lifting panel are made of high-strength steel, with high structural strength and reasonable weight control, making it easy to move without being bulky.

[0016] 4. The secondary lifting mechanism of this invention is equipped with a limit slide rail to ensure smooth lifting of the threaded slider. The rubber buffer pad at the bottom of the connecting plate can buffer vibration and prevent materials from being damaged by impact during height adjustment. It has a good protective effect on the transfer of fragile items or precision parts.

[0017] 5. The transfer and storage boxes on both sides of the lifting panel of this invention enable the classified storage of materials, improve the efficiency of transfer and sorting, and the symmetrical distribution ensures the force balance of the trolley, further enhancing the load-bearing stability; each connection part adopts a detachable connection method such as pins and bolts, which facilitates maintenance and replacement of parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the cross-type lifting frame and the hydraulic cylinder of the present invention; Figure 4 For the present invention Figure 1 A magnified structural diagram of A in the diagram.

[0019] In the diagram: 21. Base; 22. Moving wheel; 23. Slide seat; 24. Lower connecting boss; 25. Sliding wheel; 26. Connecting shaft; 27. Lifting panel; 28. Upper connecting boss; 29. ​​Cross-type lifting frame; 30. Connecting block; 31. Connecting seat; 32. Hydraulic lifting cylinder; 33. Bearing seat; 4. Secondary lifting mechanism; 41. Fixed panel; 42. Drive motor; 43. Threaded connecting shaft; 44. Threaded slider; 45. Limiting slide rail; 46. Connecting plate; 47. Buffer pad; 48. Connecting bracket; 49. Transfer and storage box. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0022] Example 1: A preferred embodiment of the rapidly lifting and lowering transfer trolley provided by the present invention is as follows: Figure 1-4 As shown: A transfer trolley that can be quickly raised and lowered includes a base 21 that provides bottom support and movement function, a lifting panel 27 for carrying the transferred items, and a secondary lifting mechanism 4 for realizing secondary height adjustment. The base 21 is welded from Q235 steel plate, and the two sides of the base 21 are movably connected to the moving wheels 22 by bolts. A sliding seat 23 is fixedly installed on one side of the top of the base 21 by welding. The sliding seat 23 has a rectangular sliding groove inside, and the inner wall of the sliding groove is coated with a wear-resistant coating. Two symmetrically arranged lower connecting protrusions 24 are fixedly installed on the other side of the top of the base 21 by welding. The top of the protrusions has a pin hole. Two symmetrical sliding wheels 25 are slidably connected in the rectangular sliding groove of the sliding seat 23. The sliding wheels 25 are deep groove ball bearing pulleys with an inner diameter that matches the connecting shaft 26. The connecting shaft 26 is fixedly connected between the sliding wheels 25 and between the lower connecting bosses 24 by pins. The connecting shaft 26 is made of 45 steel. A connecting block 30 is fixedly connected to the middle of the outer wall of the connecting shaft 26 by welding. The top of the connecting block 30 is movably connected to the connecting seat 31 by a pin. The connecting seat 31 is fixedly installed at the bottom of the cylinder body of the hydraulic lifting cylinder 32 by bolts. The lifting panel 27 is made of stainless steel plate and has a rectangular structure. Its length is the same as that of the base 21. The surface is polished. Two symmetrical upper connecting bosses 28 are fixedly connected to one side of the bottom of the lifting panel 27 by welding. The structure and size of the upper connecting bosses 28 are the same as those of the lower connecting bosses 24. A convex plate is integrally formed on the other side of the bottom of the lifting panel 27. Two symmetrical bearing seats 33 are fixedly installed on the inner wall of the convex plate by bolts. Another set of connecting shafts 26 are fixedly connected between the upper connecting bosses 28 and between the bearing seats 33 by pins. Two sets of symmetrical cross-type lifting frames 29 are movably connected between the two sets of connecting shafts 26. The cross-type lifting frame 29 is composed of multiple stainless steel lifting rods that are cross-hinged. A connecting rod is fixedly connected to the middle position of the two sets of cross-type lifting frames 29 by pins. The telescopic end of the hydraulic lifting cylinder 32 is fixed to the middle of the connecting rod by pins. The hydraulic lifting cylinder 32 is a single-acting cylinder that can drive the cross-type lifting frame 29 to telescopically extend and retract, so as to realize the rapid lifting and lowering of the lifting panel 27.

[0023] Example 2: Please see Figures 1-4 Furthermore, based on Embodiment 1, the secondary lifting mechanism 4 includes an L-shaped fixed panel 41 that is fixedly installed on both sides of the top of the lifting panel 27 by bolts. The fixed panel 41 is formed by bending steel plate. A motor base is fixedly installed on the inner side of the vertical section by welding. A drive motor 42 is fixedly installed on the motor base by bolts. The drive motor 42 is a servo motor. Its output end is fixedly connected to a threaded connecting shaft 43 by a coupling. The threaded connecting shaft 43 is made of 40Cr material and is heat-treated. A threaded slider 44 is threadedly connected to the outer wall of the threaded connecting shaft 43. The threaded slider 44 has an internal threaded hole that is adapted to the threaded connecting shaft 43. The inner side of the vertical section of the fixed panel 41 is also fixed with a limit slide rail 45 by bolts. The limit slide rail 45 is a rectangular aluminum profile slide rail with a length consistent with the threaded connection shaft 43. The inner groove of the slide rail slides in cooperation with the side of the threaded slider 44 to ensure that the threaded slider 44 rises and falls smoothly. A connecting plate 46 is fixedly installed on the side of the threaded slider 44 by bolts. The connecting plate 46 is made of stainless steel. A buffer pad 47 is fixedly installed on the bottom of the connecting plate 46 by adhesive. The buffer pad 47 is made of rubber and plays a role in buffering and shock absorption. Connecting brackets 48 are fixedly installed on both sides of the connecting plate 46 by welding. The bottom of the two sets of connecting brackets 48 are fixedly connected to the transfer storage box 49 by bolts. The transfer storage box 49 is a rectangular box made of stainless steel, located on both sides of the lifting panel 27, and is used to classify and store transfer items.

[0024] When in use, push the transfer trolley and move it flexibly in the work area using the bottom wheels. After reaching the target position, step on the brake to fix the trolley and prevent it from slipping during operation.

[0025] Rapid main lifting: Activate the hydraulic lifting cylinder, and the telescopic end pushes the connecting rod of the cross-type lifting frame, causing the two sets of cross connecting rods to expand or retract; the sliding wheels at the bottom of the lifting frame slide in the slide groove seat, and the top is linked with the lifting panel through the upper connecting protrusion and bearing seat to realize the rapid lifting and lowering of the lifting panel, adjusting it to a height close to the target docking height.

[0026] Precise secondary fine-tuning: The servo motor of the secondary lifting mechanism is activated, driving the threaded connecting shaft to rotate. The threaded slider moves up and down along the threaded connecting shaft, while maintaining stability under the guidance of the limit slide rail. The threaded slider drives the transfer storage box to make synchronous fine-tuning through the connecting plate and connecting bracket, precisely adapting to the height of the target working platform to ensure smooth loading and unloading of materials.

[0027] Material transfer and unloading: Classify the materials and place them in the transfer storage boxes on both sides of the lifting panel, or place them directly on the lifting panel; after transferring to the target position, adjust to the appropriate height by reversing the double-stage lifting structure to unload the materials; after unloading, reset the lifting panel, release the brake, and push the trolley to the next work point.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are 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. A rapid lifting and lowering transfer trolley, comprising a base (21) providing a bottom support and movement function, a lifting panel (27) for carrying transfer articles, and a secondary lifting mechanism (4) for realizing secondary height adjustment, characterized in that: The base (21) is welded by Q235 steel plate, and the two sides of the base (21) are movably connected with moving wheels (22) through bolts; The secondary lifting mechanism (4) comprises an L-shaped fixed panel (41) fixedly installed at the two side positions on the top of the lifting panel (27) through bolts, the fixed panel (41) is formed by bending a steel plate, a motor base is fixedly installed on the inner side of the vertical section through welding, a driving motor (42) is fixedly installed on the motor base through bolts, the driving motor (42) is a servo motor, the output end of the driving motor (42) is fixedly connected with a threaded connecting shaft (43) through a shaft coupling, and the outer wall of the threaded connecting shaft (43) is threadedly connected with a threaded sliding block (44), and an internal thread hole matched with the threaded connecting shaft (43) is formed in the threaded sliding block (44).

2. The rapid lift transfer trolley of claim 1, wherein: A sliding groove seat (23) is fixedly installed on one side of the top of the base (21) through welding, a rectangular sliding groove is formed in the sliding groove seat (23), and a wear-resistant coating is coated on the inner wall of the sliding groove; two symmetrical lower connecting convex seats (24) are fixedly installed on the other side of the top of the base (21) through welding, and a pin shaft hole is formed in the top of the lower connecting convex seat (24).

3. The rapid lift transfer trolley of claim 2, wherein: Two symmetrical sliding wheels (25) are slidably connected in the rectangular sliding groove of the sliding groove seat (23), the sliding wheel (25) is a deep groove ball bearing pulley, the inner diameter of the sliding wheel (25) is matched with the connecting shaft (26), and the connecting shaft (26) is fixedly connected with the connecting block (30) on the middle part of the outer wall of the connecting shaft (26) through welding, the connecting block (30) is movably connected with the connecting seat (31) through a pin shaft on the top of the connecting block (30), and the connecting seat (31) is fixedly installed on the bottom of the cylinder body of the hydraulic lifting cylinder (32) through bolts.

4. The rapid lift transfer cart of claim 1, wherein: The lifting panel (27) is made of stainless steel plate and has a rectangular structure, the length of the lifting panel (27) is consistent with that of the base (21), the surface of the lifting panel (27) is polished, two symmetrical upper connecting convex seats (28) are fixedly connected with the bottom of the lifting panel (27) through welding, the structure and size of the upper connecting convex seat (28) are consistent with those of the lower connecting convex seat (24), and a convex plate is integrally connected with the other side of the bottom of the lifting panel (27), two symmetrical bearing seats (33) are fixedly installed on the inner wall of the convex plate through bolts.

5. The rapid lift transfer cart of claim 4, wherein: Another group of connecting shafts (26) are fixedly connected between the upper connecting convex seats (28) and the bearing seats (33) through pin shafts, and two groups of symmetrical cross-type lifting connecting frames (29) are movably connected between the two groups of connecting shafts (26); the cross-type lifting connecting frame (29) is composed of a plurality of stainless steel lifting connecting rods cross-linked, a connecting rod is fixedly connected to the middle positions of the two groups of cross-type lifting connecting frames (29) through a pin shaft, and the telescopic end of the hydraulic lifting cylinder (32) is fixed to the middle part of the connecting rod through a pin shaft.

6. The rapid lift transfer cart of claim 1, wherein: The inner side of the vertical section of the fixed panel (41) is also fixedly installed with a limiting sliding rail (45) through bolts, the limiting sliding rail (45) is a rectangular aluminum profile sliding rail, the length of the limiting sliding rail (45) is consistent with that of the threaded connecting shaft (43), the inner groove of the limiting sliding rail (45) is in sliding fit with the side surface of the threaded sliding block (44), and the stable lifting of the threaded sliding block (44) is ensured.

7. The rapid lift transfer cart of claim 1, wherein: The side of the threaded slider (44) is fixedly mounted with a connecting plate (46) by bolts. The connecting plate (46) is made of stainless steel. The bottom of the connecting plate (46) is fixedly mounted with a buffer pad (47) by adhesive. The buffer pad (47) is made of rubber and plays a role in buffering and shock absorption.

8. The rapid-lifting transfer trolley of claim 7, wherein: The connecting plate (46) is fixedly installed on both sides by welding with connecting brackets (48), and the bottom of the two sets of connecting brackets (48) is fixedly connected with transfer storage boxes (49) by bolts; the transfer storage boxes (49) are rectangular boxes made of stainless steel and are located on both sides of the lifting panel (27).

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