Double-core balance lifting appliance for small sand core of freight train side frame

Abstract

A double-core balance hanger for a small sand core of a freight train side frame relates to the field of sand core hangers and comprises a bearing beam, a hanging scaffold, a hanging ring, a hanging rod and a structural arm, the hanging scaffold is connected to the middle of the upper end of the bearing beam, a sling is connected to the upper side face of the hanging scaffold, and the connecting ends of the sling and the hanging scaffold are circumferentially and uniformly distributed on the hanging scaffold with the middle point of the bearing beam as the circle center. Hooks are arranged at the two ends of the bearing beam respectively, hanging rings are arranged at the upper ends of the hanging rods and can be hung at the two ends of the bearing beam, the lower ends of the hanging rods are connected with bearing plates, the width of plate bodies of the bearing plates is smaller than the width of strip-shaped groove holes preset in the vertical direction of the small sand core, and the length of the plate bodies of the bearing plates is larger than the width of the strip-shaped groove holes. According to the lifting appliance, a double-core simultaneous balanced lifting mode is adopted for lifting cores and lifting small sand cores, the working efficiency of freight train side frame core lifting and lifting can be improved, the labor intensity of workers is reduced, potential safety hazards are reduced, and the quality of the sand cores is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sand core lifting tools, specifically to a double-core balancing lifting tool for small sand cores on the side frame of a freight train. Background Technology

[0002] The side frame of a freight train is an important component of the train bogie, serving as a fundamental part connecting the bolster and wheelsets and transmitting forces. To reduce its weight, the structural cross-section is often designed as a channel or hollow shape. Therefore, multiple internal cavity forming sand cores are required during casting production. These forming sand cores are generally composed of multiple segments, layers, and small sand cores. In particular, the symmetrical structure of the side frame itself dictates that these small sand cores are mostly arranged in pairs symmetrically. With the continuous improvement of the performance and operational safety requirements of freight trains in the railway transportation sector, the requirements for the manufacturing quality of freight train side frames are also increasing. In current production, the core lifting and hoisting of freight train side frames usually involves pre-embedding steel bars inside small sand cores in conjunction with a hook. Before burying the sand, the steel bars are lowered into the core head of the sand core. Before core lifting, the sand on the core head of the middle part of the steel bars is cleaned, and the middle part of the pre-embedded steel bars is exposed outside the sand core by grinding the sand core. Then, the steel bars are hooked and directly lifted by a single-arm crane. Because this demolding and core lifting method... The force is applied to the embedded reinforcing bars. The lifting center of gravity is affected by various factors, including the embedded condition of the reinforcing bars, their mid-position, and the hook's hook position. Therefore, it is generally difficult to accurately locate the center of gravity of the small sand core on the structure. Consequently, during lifting, the small sand core often tilts and is unevenly weighted. When returning it to the sand core tray, it is very easy for a small sand core to fall to the ground at a single point, potentially rendering it unusable. Furthermore, because the hook directly hooks the reinforcing bars at a single point, the hook's slippage relative to the reinforcing bars during lifting can easily cause the small sand core to swing violently, potentially slipping and falling, posing a significant safety hazard. Therefore, it is necessary to research and develop a lifting device for small sand cores suitable for the characteristics of freight train side frame structures to solve existing technical problems and meet actual production needs. Utility Model Content

[0003] The purpose of this invention is to provide a double-core balancing lifting tool for small sand cores on the side frame of freight trains, which improves core lifting efficiency, reduces labor intensity, minimizes safety hazards, and ensures sand core quality.

[0004] A double-core balancing hoist for a small sand core on the side frame of a freight train includes: a support beam, a lifting platform, lifting rings, lifting rods, and a structural arm. The support beam is a straight rod, and the lifting platform is a flat plate. The lifting platform and the support beam are coplanarly connected to the upper middle part of the support beam. Suspension cables are distributed and connected to the upper side of the lifting platform. The connection ends of the suspension cables to the lifting platform are evenly distributed around the midpoint of the support beam on the lifting platform. The other ends of the suspension cables are bundled and connected to the lifting rings, allowing a single-arm hoist to horizontally and balancedly suspend the lifting platform through the lifting rings. Hooks are respectively provided at both ends of the support beam. The lifting rod has a straight rod body with a hook at the upper end. The two lifting rods can be respectively hooked to both ends of the support beam using the structural cooperation between the hook and the hook. Support plates are respectively connected to the lower ends of the lifting rods. The support plates are rectangular plates with a width W less than [missing value]. The width of the pre-set strip-shaped groove hole in the vertical direction of the small sand core is greater than the length L of the plate body, so that the support plate can pass through the strip-shaped groove hole in the same direction as the strip-shaped groove hole in the length direction. After rotating the rod by 90°, the support plate can support the small sand core from below in the direction perpendicular to the strip-shaped groove hole in the length direction. The two structural arms are correspondingly arranged with the hooks. One end of each structural arm is hinged to the support beam and can swing in the same plane as the support beam. The other end is provided with a first elastic clip. When the rods are respectively hooked on the hooks, the first elastic clip can be locked onto the rod body, restricting the rod from swinging in the direction of the support beam and preventing the small sand cores hanging on the two rods from colliding with each other and causing damage.

[0005] Preferably, the boom has a split structure, consisting of an upper boom and a lower boom connected coaxially. The lower boom can rotate relative to the upper boom. During the coating process, the small sand core can be rotated by rotating the lower boom without disturbing the support beam, thereby improving coating efficiency, reducing accident risks, and ensuring production safety.

[0006] Preferably, a thrust bearing is provided between the load-bearing sections where the upper rod and the lower rod are connected. The upper rod bears the weight of the lower rod and the small sand core it carries through the thrust bearing, thereby reducing the frictional resistance of the lower rod rotating relative to the upper rod and further improving the efficiency of the coating operation on the small sand core.

[0007] Preferably, a handle is installed on the lower rod body, and the handle is perpendicular to the lower rod body. The lower rod body can be rotated by moving the handle, which improves the convenience of rotating the lower rod body and the accuracy of operation control.

[0008] Preferably, the handle rod is hinged to the lower rod body, and a second elastic clip is provided on the upper rod body. The handle rod can be flipped upward relative to the lower rod body from a state that is perpendicular to the lower rod body to a state that is parallel to the lower rod body. In the state that is parallel to the lower rod body, the handle rod can be engaged in the second elastic clip to lock the rotational freedom between the lower rod body and the upper rod body. This prevents the small sand core from rotating on its own during the transfer process after core raising, which could cause a change in the center of gravity and lead to the beam becoming unbalanced and tilting, thus adversely affecting subsequent process steps.

[0009] Preferably, a limiting ball is provided at the hook head end of the hook, and the diameter of the limiting ball is larger than the diameter of the hook body. The limiting ball helps to prevent the hooking ring that is attached to the hook from sliding off relative to the hook body, thereby enhancing the reliability of the hook engagement.

[0010] The beneficial effects of this utility model are as follows: It provides a double-core balancing lifting device for small sand cores on the side frame of a freight train. Taking into account the symmetrical structure of the freight train side frame, it employs a dual-core simultaneous balancing lifting method for both core lifting and transporting of the small sand cores. Furthermore, the coating application to the surface of the small sand cores is completed while they are suspended during transport. This not only significantly improves the efficiency of core lifting and transporting on the freight train side frame and reduces the labor intensity of workers, but also, by using the structural arm to limit the swing of the lifting rod in the direction of the supporting beam, it avoids potential collisions between the two small sand cores being transported, reducing safety hazards and ensuring the quality of the sand cores. Moreover, the use of a split-type lifting rod structure, along with a handle rod that also functions as a limiter, facilitates the coating application work for operators, reduces the workload of coating, and improves the efficiency of coating operations. It also helps maintain the stability of the small sand cores during core lifting and transport, providing a more reliable guarantee for production safety and sand core quality. Attached Figure Description

[0011] Figure 1 Front view of the double-core balancing spreader structure for small sand cores on the side frame of a freight train.

[0012] Figure 2 for Figure 1 Enlarged view of the local structure at point I.

[0013] Figure 3 for Figure 2 Sectional view of section AA.

[0014] Figure 4 This is a partial structural diagram showing the handle lever and the second elastic clip separated from each other.

[0015] Figure 5 for Figure 1Sectional view of section BB.

[0016] Figure 6 for Figure 1 Partial bottom view from the center (K ​​direction).

[0017] Figure 7 Top view of a double-core balancing spreader structure for a small sand core on the side of a freight train.

[0018] Among them: 1 is the supporting beam, 2 is the hanging platform, 3 is the lifting ring, 4 is the structural arm, 5 is the sling, 6 is the hook, 7 is the upper rod body, 8 is the lower rod body, 9 is the thrust bearing, 10 is the small sand core, 11 is the hanging ring, 12 is the support plate, 13 is the first elastic clamp, 14 is the handle rod, 15 is the second elastic clamp, 16 is the bearing plate, 17 is the connecting sleeve, and 18 is the limiting ball head. Detailed Implementation

[0019] Furthermore, the technical solution for which protection is sought in this utility model will be described in detail below with reference to specific embodiments and accompanying drawings.

[0020] A double-core balancing spreader for small sand cores on the side frame of a freight train, such as Figures 1 to 7As shown, the structure consists of a beam 1, a hanging platform 2, a lifting ring 3, a structural arm 4, slings 5, hooks 6, an upper rod 7, a lower rod 8, and a thrust bearing 9. The beam 1 is a straight rod, and the hanging platform 2 is a circular plate. The center of the hanging platform 2 coincides with the center of the beam 1 and is fixedly connected to the upper middle part of the beam 1. Four sling connection points are evenly distributed along the circumference on the upper side of the hanging platform 2. One end of each of the four slings 5 ​​is connected to one of the sling connection points, and the other end is bundled and connected to the lifting ring 3. Two hooks 6 are positioned relative to the center of the beam 1. Symmetrically installed at both ends of the supporting beam 1, with a limiting ball head 18 at the hook end of the hook 6; the upper rod body 7 and the lower rod body 8 combine to form a straight rod suspension rod, the upper end of the upper rod body 7 is provided with a hanging ring 11, the lower end is provided with a bearing plate 16, and a second elastic clip 15 is installed on the rod body; the upper end of the lower rod body 8 is connected to a connecting sleeve 17, and the lower end is connected to a support plate 12, the support plate 12 is a rectangular plate with a width W and a length L; the connecting sleeve 17 is a circular sleeve with an annular inner convex flange at the upper end, and the outer side of the sleeve is hinged to... A handle 14 is attached, with its lower end threadedly connected to the lower rod body 8. A bearing plate 16 corresponds to and is fitted into the connecting sleeve 17, with a corresponding fit and limiting placement. A thrust bearing 9 is positioned between the bearing plate 16 and the inner flange and fitted onto the upper rod body 7, supported and limited by the bearing plate 16. The connecting sleeve 17 is mounted on the thrust bearing 9 via the inner flange, allowing the thrust bearing 9 to be accommodated within the connecting sleeve 17. The handle 14 can be vertically positioned relative to the lower rod body 8, allowing for... When flipped up 90°, it can be engaged in the second elastic clip 15, restricting the rotation of the lower rod 8 relative to the upper rod 7; the upper ends of the two structural arms 4 are respectively hinged to the supporting beam 1, and the lower ends are respectively provided with the first elastic clip 13. The two hooks 6 are respectively installed at both ends of the supporting beam 1, and can respectively engage with the hanging ring 11 to hang the upper rod 7. The first elastic clip 13 can swing and engage on the rod of the upper rod 7 on the corresponding side, so that the structural arms 4, the upper rod 7 and the supporting beam 1 form a triangular stable structure.

[0021] The core-lifting operation using the double-core balancing hoist for small sand cores on the side frame of a freight train as described in this embodiment is performed as follows: First, the single-beam crane in the production workshop is positioned at the core-lifting station. Then, the lifting plate 2 and the supporting beam 1 are attached to the single-beam crane using the lifting ring 3. Next, the two corresponding small sand cores 10 are demolded and ejected using the starting device. Two assembled lifting rods are then taken out. The handle rod 14 is flipped upwards and engaged in the second elastic clamp 15, locking the rotational freedom between the upper rod body 7 and the lower rod body 8, and maintaining the length direction of the support plate 12 relative to the small sand core 1. The pre-drilled strip-shaped grooves on the 0 are arranged in the same direction. The two lower rods 8 are sequentially inserted into the corresponding strip-shaped grooves on the two small sand cores 10 until the support plate 12 extends from the lower end of the strip-shaped groove. The lifting rods are then rotated 90° and hooked onto the beam 1 using the engagement of the hook ring 11 and hook 6. Next, the two structural arms 4 are sequentially rotated, and the first elastic clips 13 on the structural arms 4 are engaged with the corresponding upper rods 7. The single-beam crane is then slowly lifted to lift the two small sand cores 10. The upper rod is lifted and smoothly transferred to the painting station by the support plate 12. At the painting station, the handle 14 is turned downwards to disengage from the second elastic clamp 15 and flip to a position perpendicular to the lower rod 8. The handle 14 is then used to rotate the lower rod 8 to control the rotation of the small sand core 10, assisting in the application of the phenolic resin coating until the painting operation is complete. Afterwards, the handle 14 is fully flipped upwards and engaged with the second elastic clamp 15, relocking the upper rod. The rotational freedom between 7 and the lower rod 8 is then determined. Subsequently, the small sand core 10 is smoothly hoisted to the sand core tray setting position and placed on the sand core tray for subsequent production use. After confirming that it is placed stably, the engagement connection between the first elastic clip 13 and the upper rod 7 is first pulled apart to separate the structural arm 4 from the upper rod 7. Then, the two lifting rods are removed from the hook 6 in sequence, rotated 90° and slowly pulled out from the strip-shaped groove hole. This completes the core extraction operation of a set of small sand cores 10.

Claims

1. A double core balanced spreader for freight train side frame small size sand core, characterized in that, It includes: The beam (1), the hanging plate (2), the hanging ring (3), the hanging rod and the structure arm (4), the beam (1) is a straight pole body, the hanging plate (2) is a plane plate body, the hanging plate (2) is connected with the beam (1) corresponding coplanar setting in the upper end of the beam (1) middle, the distribution connection has sling (5) on the upper side of the hanging plate (2), the connection end of the sling (5) and the hanging plate (2) is evenly distributed on the hanging plate (2) with the midpoint of the beam (1) as the center, the other end of the sling (5) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring (3), the hanging ring (3) is connected in the hanging ring ( 2. The balanced spreader with two cores for small sand cores of side frame of freight train according to claim 1, characterized in that: ​ 3. The double-core balancing spreader for a small sand core on the side frame of a freight train as described in claim 2, characterized in that: ​ 4. The balanced spreader with two cores for small cores of side frame of freight train according to claim 2 or 3, characterized in that: ​ 5. The double-core balancing spreader for a small sand core on the side frame of a freight train as described in claim 4, characterized in that: ​ 6. The balanced spreader of claim 5, wherein: A limiting ball head (18) is arranged at the hook head end of the hook (6), and the diameter of the limiting ball head (18) is greater than the diameter of the hook body of the hook (6).

Images