A trolley structure with a long service life

Abstract

The utility model provides a trolley structure of effective extension life, include: table board, the bottom of table board is provided with mutually perpendicular horizontal reinforcing rib and longitudinal reinforcing rib, longitudinal reinforcing rib and horizontal reinforcing rib cross arrangement and the same height of bottom, the horizontal reinforcing rib and longitudinal reinforcing rib of trolley bottom mutually perpendicular and isalike height form cross support structure, compared with the single body structure of traditional integral casting trolley, can even scattered to whole support frame with sand mould, pouring system load etc, avoid local stress concentration, reduce the derailment risk of trolley caused by fatigue fracture, reduce the serious shutdown accident caused by equipment failure, the quick change mechanism of trolley bottom passes through the bolted connection structure of first quick -release block, second quick -release block and reinforcing rib, can quick detach and replace the worn roller or mounting block. Do not need to destructive disassembly to trolley body, improve component replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of trolley structure technology, specifically to a trolley structure that effectively extends service life. Background Technology

[0002] Casting trolleys play a crucial role in the casting process, securing sand molds and other casting components. They provide robust support for key components such as sand molds and gating systems, ensuring their stability during casting. On high-precision casting (HWS) production lines, trolleys can be integrated with automated control systems, supporting rapid sand mold changes and precise adjustments to process parameters. Automated control reduces the need for manual operation of the trolleys, improving overall production efficiency. The trolley provides a stable platform during high-speed casting, preventing vibrations or impacts caused by rapid pouring. Trolley designs typically possess sufficient rigidity and flexibility to support the stringent requirements of high-precision casting processes on sand molds and gating systems.

[0003] The HWS production line uses a one-piece casting process for each transfer mechanism. After 5 million molds have been made, fractures caused by stress fatigue of the main body have resulted in derailment of the transfer trolleys, causing serious downtime. The repair and maintenance costs after the damage are very high. The fracture of the HWS trolley body seriously affects product quality and dimensional accuracy. The cost of investing in a new HWS trolley body is high and the production cycle is long. The derailment of the HWS trolley body poses a safety hazard to production and is not conducive to use. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art by providing a trolley structure that effectively extends the service life.

[0005] The specific technical solution is as follows: A trolley structure that effectively extends service life includes: a platform, wherein the bottom of the platform is provided with mutually perpendicular transverse reinforcing ribs and longitudinal reinforcing ribs, wherein the longitudinal reinforcing ribs and the transverse reinforcing ribs are arranged intersectingly and have the same bottom height, and quick-change mechanisms are provided on the transverse reinforcing ribs and the longitudinal reinforcing ribs. The quick-release mechanism includes a first quick-release block and a second quick-release block respectively disposed at the bottom of the transverse reinforcing rib and the longitudinal reinforcing rib. The bottom of the first quick-release block and the second quick-release block are provided with locking holes. The bottom of the first quick-release block and the second quick-release block are provided with limiting grooves of the same size at the center position. An installation block is installed in the limiting groove. A rotating rod is rotatably connected to the installation block. A roller is fixedly connected to the surface of the rotating rod.

[0006] The above-mentioned trolley structure that effectively extends service life includes: the bottom of the longitudinal reinforcing rib and the transverse reinforcing rib having a fixing groove corresponding to the top of the first quick-release block and the second quick-release block; the locking hole having a bolt threaded inward; and the first quick-release block and the second quick-release block being connected to the transverse reinforcing rib and the longitudinal reinforcing rib by bolts.

[0007] The above-mentioned trolley structure for effectively extending service life includes: a connecting hole is provided in the limiting groove, and the mounting block is connected to the connecting hole by bolts.

[0008] The above-mentioned trolley structure for effectively extending service life includes: a limiting mechanism provided at the bottom of the platform, the limiting mechanism including a fixed plate fixedly connected to the bottom of the platform by bolts, a hydraulic rod fixedly connected to the bottom of the fixed plate, and a fixed block fixedly connected to the telescopic end of the hydraulic rod.

[0009] The above-mentioned trolley structure for effectively extending service life includes: the fixing block is arc-shaped, and the width of the fixing block corresponds to that of the roller.

[0010] The above-mentioned trolley structure that effectively extends service life includes: a dustproof protective sleeve on the outer side of the hydraulic rod; the dustproof protective sleeve adopts a telescopic corrugated tube structure, one end of which is sealed to the bottom of the fixed plate, and the other end is sealed to the top of the fixed block; the dustproof protective sleeve is an oil-resistant nitrile rubber sleeve.

[0011] The above-mentioned trolley structure for effectively extending service life includes: symmetrically arranged connecting bolts at the center of the top of the platform, and the connecting bolts are inserted into the surface of the platform.

[0012] This utility model has the following beneficial effects: The horizontal and vertical reinforcing ribs at the bottom of the trolley, perpendicular to each other and of equal height, form a cross-support structure. Compared to the single body structure of traditional one-piece cast trolleys, this structure evenly distributes the loads from the sand mold and gating system across the entire support frame, avoiding localized stress concentration, reducing the risk of trolley derailment due to fatigue fracture, and minimizing serious downtime caused by equipment failure. The quick-change mechanism at the bottom of the trolley, through bolted connections between the first and second quick-release blocks and the reinforcing ribs, allows for quick disassembly and replacement of worn rollers or mounting blocks without destructive disassembly of the trolley body, thus improving component replacement efficiency. Attached Figure Description

[0013] Figure 1 A schematic diagram of a trolley structure that effectively extends the service life of an embodiment of this utility model; Figure 2 A schematic diagram of a quick-change mechanism for a trolley structure that effectively extends service life, provided for an embodiment of this utility model; Figure 3 A schematic diagram of the bottom of the platform of a trolley structure that effectively extends the service life, provided for an embodiment of this utility model; Figure 4 The trolley structure provided in this embodiment of the utility model effectively extends the service life. Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0014] In the attached image: 100. Countertop; 110. Anti-slip ridge; 120. Connecting bolt; 200. Horizontal reinforcing rib; 210. Longitudinal reinforcing rib; 300. Quick-change mechanism; 310. First quick-release block; 320. Second quick-release block; 330. Locking hole; 340. Limiting groove; 350. Connecting hole; 360. Mounting block; 370. Rotating rod; 380. Roller; 400. Limiting mechanism; 410. Fixing plate; 420. Hydraulic rod; 430. Fixing block. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0017] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Example This embodiment provides a trolley structure that effectively extends service life, such as... Figures 1-4 As shown, it includes: a tabletop 100, with mutually perpendicular horizontal reinforcing ribs 200 and vertical reinforcing ribs 210 at the bottom of the tabletop 100. The vertical reinforcing ribs 210 and the horizontal reinforcing ribs 200 are intersected and have the same bottom height. A quick-change mechanism 300 is provided on the horizontal reinforcing ribs 200 and the vertical reinforcing ribs 210. The quick-change mechanism 300 includes a first quick-release block 310 and a second quick-release block 320 respectively provided at the bottom of the horizontal reinforcing ribs 200 and the vertical reinforcing ribs 210. The bottom of the first quick-release block 310 and the second quick-release block 320 are both provided with locking holes 330. The bottom of the first quick-release block 310 and the second quick-release block 320 are provided with limiting grooves 340 of the same size at the center position. An installation block 360 is installed in the limiting groove 340. A rotating rod 370 is rotatably connected to the installation block 360. A roller 380 is fixedly connected to the surface of the rotating rod 370.

[0020] The above-mentioned technical solution provides an effective way to extend the service life of a trolley structure. The horizontal reinforcing ribs 200 and longitudinal reinforcing ribs 210 at the bottom of the trolley, which are perpendicular and of equal height, form a cross-support structure. Compared to the single body structure of a traditional one-piece cast trolley, this structure can evenly distribute the loads from the sand mold and gating system throughout the entire support frame, avoiding localized stress concentration, reducing the risk of trolley derailment due to fatigue fracture, and minimizing serious downtime caused by equipment failure. The quick-change mechanism 300 at the bottom of the trolley, through the bolted connection structure of the first quick-release block 310, the second quick-release block 320, and the reinforcing ribs, allows for quick disassembly and replacement of worn rollers 380 or mounting blocks 360. This eliminates the need for destructive disassembly of the trolley body, improving component replacement efficiency. Anti-slip ridges 110 are provided on the platform 100.

[0021] To further enhance the stability of the connection between the first quick-release block 310, the second quick-release block 320, and the transverse and longitudinal reinforcing ribs 200, and to prevent displacement of the quick-change mechanism 300 when the trolley is carrying heavy loads or moving at high speeds, the bottom of the longitudinal and transverse reinforcing ribs 210 and 200 are provided with fixing grooves corresponding to the tops of the first and second quick-release blocks 310 and 320. Bolts are threaded into the locking holes 330. Both the first and second quick-release blocks 310 and 320 are connected to the transverse and longitudinal reinforcing ribs 200 and 210 respectively via bolts. The bolts are made of high-strength stainless steel, possessing excellent shear and fatigue resistance. After tightening the bolts, the quick-release blocks and reinforcing ribs are tightly fitted together, preventing loosening due to vibration.

[0022] To ensure the installation accuracy of the mounting block 360 within the limiting groove 340 and prevent it from shifting during trolley movement, thus affecting the rotational stability of the roller 380, a connecting hole 350 is provided within the limiting groove 340. The mounting block 360 is connected to the connecting hole 350 via bolts. The bolts feature an anti-loosening design, effectively resisting vibrations generated during trolley movement and preventing loosening. This ensures the mounting block 360 remains stable, guaranteeing the normal rotation of the roller 380, reducing additional wear caused by misalignment, and extending the service life of the roller 380.

[0023] To achieve precise positioning of the trolley at the casting station and prevent displacement due to vibration or impact during high-speed casting, a limiting mechanism 400 is provided at the bottom of the table 100. The limiting mechanism 400 includes a fixing plate 410 fixedly connected to the bottom of the table 100 by bolts, a hydraulic rod 420 fixedly connected to the bottom of the fixing plate 410, and a fixing block 430 fixedly connected to the telescopic end of the hydraulic rod 420.

[0024] To improve the fit between the fixing block 430 and the roller 380, ensure the limiting effect of the limiting mechanism 400, and prevent the trolley from sliding due to insufficient fit, the fixing block 430 is arc-shaped, and the width of the fixing block 430 corresponds to that of the roller 380.

[0025] To protect the hydraulic rod 420 from dust, oil, and other impurities in the casting production environment, a dustproof protective sleeve is fitted over its outer side. This sleeve employs a telescopic corrugated tube structure, with one end sealed to the bottom of the fixing plate 410 and the other end sealed to the top of the fixing block 430. The dustproof sleeve is made of oil-resistant nitrile rubber. Oil-resistant nitrile rubber possesses excellent oil resistance, wear resistance, and high-temperature resistance, enabling it to adapt to the harsh environment of casting production. This prevents damage to the dustproof sleeve due to oil corrosion or high-temperature aging, ensuring long-term protection of the hydraulic rod 420.

[0026] To enable rapid assembly of multiple trolleys, connecting bolts 120 are symmetrically installed at the center of the top of the platform 100, and the connecting bolts 120 are inserted into the surface of the platform 100. When it is necessary to transport large sand molds, the platforms 100 of multiple trolleys can be spliced ​​together through the connecting bolts 120 to form a larger support platform, meeting the transportation needs of large sand molds.

[0027] In summary, the trolley structure provided in this embodiment, which effectively extends service life, has the following advantages: The horizontal reinforcing ribs 200 and longitudinal reinforcing ribs 210 at the bottom of the trolley, which are perpendicular and of equal height, form a cross-support structure. Compared to the single body structure of a traditional one-piece cast trolley, this structure can evenly distribute the loads from the sand mold, gating system, etc., throughout the entire support frame, avoiding localized stress concentration, reducing the risk of trolley derailment due to fatigue fracture, and minimizing serious downtime accidents caused by equipment failure. The quick-change mechanism 300 at the bottom of the trolley, through the bolted connection structure between the first quick-release block 310, the second quick-release block 320, and the reinforcing ribs, allows for quick disassembly and replacement of worn rollers 380 or mounting blocks 360. This eliminates the need for destructive disassembly of the trolley body, improving component replacement efficiency.

[0028] In use, during the casting operation on the HWS production line, heavy objects such as sand molds and gating systems are first placed on the trolley platform 100, transferring the load to the mutually perpendicular transverse reinforcing ribs 200 and longitudinal reinforcing ribs 210 at the bottom. When the trolley is subjected to external driving force, the rotating rod 370 rotates at high speed around the axis of the mounting block 360, thereby driving the rollers 380 fixedly connected to the surface to roll, realizing the movement of the entire trolley along the designated track. The first quick-release block 310 and the second quick-release block 320, through precise matching of the top and bottom fixing grooves of the reinforcing rib, and the tightening of the high-strength bolts in the locking hole 330, ensure that the quick-change mechanism 300 is connected to the reinforcing rib without loosening, thus guaranteeing stability. After the trolley moves to the designated casting station of the HWS production line via the roller 380, the hydraulic rod 420 at the bottom of the locking plate 410 needs to be activated by the limiting mechanism 400. The telescopic end of the hydraulic rod 420 extends downward, pushing the fixing block 430 fixedly connected at the bottom closer to the roller 380. Since the fixing block 430 is arc-shaped and the radius of the arc is perfectly matched with the outer radius of the roller 380, when the telescopic end of the hydraulic rod 420 is fully extended, the inner wall of the fixing block 430 can fit tightly against the outer surface of the roller 380, limiting and locking it, thus achieving precise locking of the trolley at the station.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A trolley structure that effectively extends service life, characterized in that, include: The tabletop (100) has a bottom provided with mutually perpendicular transverse reinforcing ribs (200) and longitudinal reinforcing ribs (210). The longitudinal reinforcing ribs (210) and the transverse reinforcing ribs (200) are arranged to cross each other and have the same bottom height. The transverse reinforcing ribs (200) and the longitudinal reinforcing ribs (210) are provided with quick-change mechanisms (300). The quick-release mechanism (300) includes a first quick-release block (310) and a second quick-release block (320) respectively disposed at the bottom of the transverse reinforcing rib (200) and the longitudinal reinforcing rib (210). The bottom of the first quick-release block (310) and the second quick-release block (320) are provided with locking holes (330). The bottom of the first quick-release block (310) and the second quick-release block (320) are provided with limiting grooves (340) of the same size at the center position. An installation block (360) is installed in the limiting groove (340). A rotating rod (370) is rotatably connected to the installation block (360). A roller (380) is fixedly connected to the surface of the rotating rod (370).

2. The trolley structure for effectively extending service life according to claim 1, characterized in that, The bottom of the longitudinal reinforcing rib (210) and the transverse reinforcing rib (200) are provided with fixing grooves corresponding to the top of the first quick-release block (310) and the second quick-release block (320). The locking hole (330) is internally threaded with a bolt. The first quick-release block (310) and the second quick-release block (320) are both connected to the transverse reinforcing rib (200) and the longitudinal reinforcing rib (210) by bolts.

3. The trolley structure for effectively extending service life according to claim 2, characterized in that, The limiting groove (340) is provided with a connecting hole (350), and the mounting block (360) is connected to the connecting hole (350) by bolts.

4. The trolley structure for effectively extending service life according to claim 1, characterized in that, The bottom of the tabletop (100) is provided with a limiting mechanism (400). The limiting mechanism (400) includes a fixing plate (410) fixedly connected to the bottom of the tabletop (100) by bolts. A hydraulic rod (420) is fixedly connected to the bottom of the fixing plate (410), and a fixing block (430) is fixedly connected to the telescopic end of the hydraulic rod (420).

5. The trolley structure for effectively extending service life according to claim 4, characterized in that, The fixing block (430) is arc-shaped, and the width of the fixing block (430) corresponds to that of the roller (380).

6. The trolley structure for effectively extending service life according to claim 4, characterized in that, The hydraulic rod (420) is fitted with a dustproof protective sleeve on its outer side. The dustproof protective sleeve adopts a telescopic corrugated tube structure. One end of the sleeve is sealed to the bottom of the fixing plate (410), and the other end is sealed to the top of the fixing block (430). The dustproof protective sleeve is an oil-resistant nitrile rubber sleeve.

7. The trolley structure for effectively extending service life according to any one of claims 1-6, characterized in that, A connecting bolt (120) is symmetrically arranged at the center of the top of the tabletop (100), and the connecting bolt (120) is inserted into the surface of the tabletop (100).

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