Sand core hoisting device

Abstract

The present disclosure relates to the technical field of sand core hoisting tools, and an embodiment of the present disclosure provides a sand core hoisting tool, which comprises a sand core body and a lifting ring, the lifting ring is arranged on the sand core body, a lifting assembly is arranged on the lifting ring, the lifting assembly comprises a fixing block, the fixing block is fixed at the lower end of the lifting ring, connecting grooves are arranged at both ends of the side surface of the fixing block, support frames are rotatably connected in the connecting grooves through pins, a notch is arranged at the side end surface of the fixing block, springs are connected between the notch and the support frames, a fixing rod is arranged at the bottom surface of the fixing block, a first threaded groove is arranged at the lower end of the fixing rod, and an extension rod is screw-connected in the first threaded groove through threads. Through the above technical scheme, the technical problem that the existing sand core hoisting generally relies on the direct connection between the lifting ring and the sand core, but the connection mode of the two has structural defects and is prone to falling during lifting is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of sand core hoisting fixtures, and more specifically, to a sand core hoisting fixture. Background Technology

[0002] In the casting production field, sand cores are the core components that form the complex internal cavities of castings. The hoisting process is a crucial step connecting sand core fabrication with casting assembly. It requires the stable hoisting of sand cores using tooling to ensure their complete and precise transfer to the assembly station, preventing damage and ensuring casting quality. As the casting industry moves towards large-scale and automated production, the shortcomings of traditional sand core hoisting methods are becoming increasingly apparent: existing sand core hoisting methods generally rely on a direct connection between the hoisting ring and the sand core, but this connection method has structural defects, making it prone to detachment during hoisting. This not only causes production losses but also poses serious safety hazards.

[0003] The stability of traditional lifting ring connection methods is ill-suited to the needs of sand core lifting: sand cores are mostly brittle structures with uneven weight. During lifting, they are affected by gravity, lifting inertia, or slight swaying. Simple bolt fixing is prone to loosening of the threads, and single clips are prone to detaching from the slot due to uneven force, causing the sand core to fall from a height. The detached sand core will not only break upon impact, resulting in material waste and rework, but also interrupt the box assembly process on the production line, extending the production cycle. More importantly, sand cores or lifting rings falling from a height may damage equipment parts, damage the production floor, and even endanger the personal safety of nearby operators, bringing uncontrollable safety risks to the workshop production.

[0004] Therefore, developing sand core lifting fixtures that can achieve a stable connection between the lifting ring and the sand core and eliminate the risk of detachment has become an urgent need to solve the pain points of traditional lifting and ensure the safety and efficiency of casting production. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a sand core hoisting fixture, which solves the technical problem that existing sand core hoisting generally relies on the direct connection between the hoisting ring and the sand core, but the connection method has structural defects and is prone to falling off during the hoisting process.

[0006] According to one aspect, at least one embodiment of this disclosure provides a sand core lifting fixture, comprising: The sand core body and the lifting ring, wherein the lifting ring is mounted on the sand core body; A lifting assembly, wherein the lifting assembly is mounted on the lifting ring; The hoisting assembly includes a fixing block, which is fixed to the lower end of the lifting ring. Both ends of the side surface of the fixing block are provided with connecting grooves, and a support frame is rotatably connected to the connecting grooves via pins. A notch is provided on the side end face of the fixing block, and a spring is connected between the notch and the support frame.

[0007] As a further technical solution, a fixing rod is provided on the bottom surface of the fixing block, and a first threaded groove is provided at the lower end of the fixing rod. An extension rod is connected to the first threaded groove by thread screwing, and a locking block is provided at the lower end of the extension rod.

[0008] As a further technical solution, the surface of the card block is provided with an arc-shaped protrusion, the card block is provided with a connecting post, the upper end of the connecting post is provided with a second threaded groove, and the connecting post is screwed to the lower end of the extension rod through the second threaded groove.

[0009] As a further technical solution, the support frame has an overall L-shaped structure, and the lower end of the support frame can fit into the connecting part of the sand core body.

[0010] As a further technical solution, the connecting parts at both ends of the bottom of the sand core body are provided with limiting grooves, and the arc-shaped protrusion can fit into the limiting grooves.

[0011] As a further technical solution, the first threaded groove and the second threaded groove have opposite thread directions.

[0012] As a further technical solution, the support frame can be rotated upwards by 90° through the connection with the connecting groove pin.

[0013] As a further technical solution, the through grooves on both sides of the sand core body have a certain inclination angle.

[0014] According to another aspect, at least one embodiment of the present invention is provided.

[0015] The beneficial effects of the embodiments disclosed herein are as follows: This disclosure solves the problem of easy detachment of traditional lifting ring connections by using a lifting assembly. The L-shaped support frame can flexibly rotate around the pin shaft. After being inserted into the through groove of the sand core body, the spring rebound pushes the support frame to unfold outward. Its lower end can tightly fit the connection part of the sand core body, forming a stable support from the radial direction, preventing the assembly from shaking in the through groove. The elastic deformation characteristics of the spring can adapt to the small dimensional deviations of the inner wall of the through groove, which not only prevents rigid contact from damaging the sand core body or the support frame, but also maintains a uniform clamping force at all times. Even if subjected to inertia or slight vibration during lifting, the support frame will not loosen or detach, providing the first layer of protection against detachment for the sand core body.

[0016] The L-shaped structure increases the contact area with the sand core body, which can disperse the local stress during lifting, avoid damage to the sand core body due to stress concentration, balance the safety of lifting and the integrity of the sand core body, and meet the lifting needs of the brittle structure of the sand core body. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is another isometric view of the present disclosure; Figure 4 This is yet another isometric view from which this disclosure is made; Figure 5 This is an isometric sectional view of the present disclosure; In the diagram: 1. Sand core body; 2. Lifting ring; 3. Lifting assembly; 3-1. Fixing block; 3-2. Connecting groove; 3-3. Support frame; 3-4. Groove; 3-5. Spring; 3-6. Fixing rod; 3-7. First threaded groove; 3-8. Extension rod; 3-9. Locking block; 3-10. Arc-shaped protrusion; 3-11. Connecting column; 3-12. Second threaded groove; 4. Limiting groove. Detailed Implementation

[0019] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0022] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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, they should not be construed as limitations on this disclosure.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-5 As shown, it illustrates a sand core lifting fixture according to an embodiment of the present disclosure, comprising: The sand core body 1 and the lifting ring 2 are provided on the sand core body 1; Lifting assembly 3, which is mounted on the lifting ring 2; The hoisting assembly 3 includes a fixing block 3-1, which is fixed to the lower end of the lifting ring 2. Both ends of the side surface of the fixing block 3-1 have connecting grooves 3-2, and a support frame 3-3 is rotatably connected to each connecting groove 3-2 via a pin. A notch 3-4 is formed on the side end face of the fixing block 3-1, and a spring 3-5 connects the notch 3-4 to the support frame 3-3. A fixing rod 3-6 is provided on the bottom surface of the fixing block 3-1. The lower end is provided with a first threaded groove 3-7, and an extension rod 3-8 is connected to the first threaded groove 3-7 by screwing. The lower end of the extension rod 3-8 is provided with a locking block 3-9, and the surface of the locking block 3-9 is provided with an arc-shaped protrusion 3-10. A connecting post 3-11 is provided on the locking block 3-9, and a second threaded groove 3-12 is provided at the upper end of the connecting post 3-11. The connecting post 3-11 is screwed to the lower end of the extension rod 3-8 through the second threaded groove 3-12.

[0026] In some examples, in order to achieve precise fit and stable connection with the through slots on both sides of the sand core body 1, and to ensure that the sand core body 1 does not shake or fall off during hoisting, a hoisting component 3 is designed. This component includes a fixing block 3-1, the upper end of which is fixedly connected to the lower end of the lifting ring 2. It needs to maintain coaxiality to ensure that the hoisting force transmitted by the lifting ring 2 can act perpendicularly on the fixing block 3-1, and avoid the sand core body 1 tilting due to force deviation. The connecting slots 3-2 at both ends of the side surface of the fixing block 3-1 need to be precisely fitted with the ends of the support frame 3-3. The support frame 3-3 is rotatably connected in the connecting slot 3-2 by a pin, so that the support frame 3-3 can be flexibly unfolded or retracted around the pin. Before hoisting, the support frame 3-3 is rotated outward to open it so as to be inserted into the through slot of the sand core body 1. After insertion, the support frame 3-3 returns to its original shape under the action of elasticity, forming a radial support structure. The spring 3-5 connecting the notch 3-4 on the side end face of the fixing block 3-1 and the support frame 3-3 is the power source for the radial clamping of the support frame 3-3. In its natural state, the spring 3-5 is in a slightly stretched state, which can push the support frame 3-3 to rotate outward around the pin axis. When the support frame 3-3 is inserted into the through groove of the sand core body 1, the elastic force of the spring 3-5 makes the outer side of the support frame 3-3 tightly press against the inner wall of the through groove, forming a preliminary radial fixation, preventing the hoisting component 3 from swaying radially in the through groove. The elastic deformation characteristics of the spring 3-5 can also adapt to the small dimensional deviations of the inner wall of the through groove, avoiding rigid contact that could damage the through groove or the support frame 3-3, while ensuring uniform clamping force and improving the fixation stability.

[0027] The fixing rod 3-6 on the bottom surface of the fixing block 3-1 is vertically fixed to the fixing block 3-1. The threaded groove at its lower end precisely matches the external thread at the upper end of the extension rod 3-8, forming an axial length adjustment structure. By screwing the extension rod 3-8, the overall length of the fixing rod 3-6 and the extension rod 3-8 can be changed, thus adapting to the through grooves of the sand core body 1 at different depths. For deeper through grooves, the extension rod 3-8 is screwed out to increase the overall length, ensuring that the component can be inserted into the bottom of the through groove; for shallower through grooves, the extension rod 3-8 is screwed in to shorten the length, preventing the component from protruding too much from the through groove and causing the center of gravity of the sand core body 1 to shift. The threaded fit has self-locking properties, and after adjustment, no additional locking parts are needed to maintain the length stability, preventing the extension rod 3-8 from loosening during hoisting.

[0028] The lower end of the extension rod 3-8 has a locking block 3-9 connected to it via a connecting post 3-11. The second threaded groove 3-12 at the upper end of the connecting post 3-11 engages with the external thread at the lower end of the extension rod 3-8, enabling a detachable connection between the locking block 3-9 and the extension rod 3-8 (facilitating replacement of the locking block 3-9 after wear). The arc-shaped protrusion 3-10 on the surface of the locking block 3-9 is made of a wear-resistant and non-slip material. When the component is inserted into the through slot and rotated 90°, the arc-shaped protrusion 3-10 fits tightly against the inner wall of the bottom of the through slot, increasing... The large contact friction force, along with the arc-shaped structure that can adapt to the arc transition at the bottom of the through groove, avoids local stress concentration. The diameter of the locking block 3-9 is slightly larger than the diameter of the extension rod 3-8, which can limit the depth of the component inserted into the through groove, preventing the component from being over-inserted and damaging the sand core body 1. At the same time, it forms a bottom support, which is radially pressed against the support frame 3-3 to ensure that the lifting component 3 is firmly connected to the through groove of the sand core body 1 when the lifting equipment is hoisting. The sand core body 1 always remains in a stable state, meeting the safe transportation requirements of the sand core body 1.

[0029] For example, such as Figure 3 As shown, the support frame 3-3 has an overall L-shaped structure, and the lower end of the support frame 3-3 can fit into the connecting part of the sand core body 1.

[0030] In some examples, the support frame 3-3 has an overall L-shaped structure. Its vertical section is rotatably engaged with the connecting groove 3-2 of the fixing block 3-1 via a pin, while the horizontal section extends toward the connecting part of the sand core body 1. When the support frame 3-3 is inserted into the through groove of the sand core body 1 and unfolds under the action of the spring 3-5, the horizontal section can precisely fit the surface of the connecting part of the sand core body 1, forming a dual force-bearing structure. The vertical section bears the radial clamping force, preventing the component from shaking in the through groove.

[0031] For example, such as Figure 2 As shown, the bottom ends of the sand core body 1 are connected by limiting grooves 4, and the arc-shaped protrusions 3-10 can fit into the limiting grooves 4.

[0032] In some examples, the limiting grooves 4 formed at the bottom ends of the sand core body 1 are perfectly matched with the arc-shaped protrusions 3-10 on the surface of the locking block 3-9. When the locking block 3-9 is inserted into the bottom of the through groove along with the component, the arc-shaped protrusions 3-10 can be tightly embedded in the limiting grooves 4. The anti-slip material of the arc-shaped protrusions 3-10 forms close contact with the sidewall of the limiting groove 4, which restricts the radial movement of the locking block 3-9 through the groove shape constraint, and prevents the hoisting component 3 from rotating or shifting within the through groove.

[0033] For example, such as Figure 5 As shown, the first threaded groove 3-7 has the opposite thread direction to the second threaded groove 3-12.

[0034] In some examples, the first threaded groove 3-7 at the lower end of the fixed rod 3-6 (which mates with the extension rod 3-8) and the second threaded groove 3-12 at the upper end of the connecting column 3-11 (which mates with the extension rod 3-8) have opposite thread directions. This design prevents the extension rod 3-8 from loosening synchronously due to vibration during hoisting.

[0035] For example, such as Figure 3 As shown, the support frame 3-3 can be rotated upwards by 90° through the pin connection with the connecting groove 3-2.

[0036] In some examples, the support frame 3-3 can be flipped upwards by 90° via a pin connection with the connecting slot 3-2. This flipping function enhances the flexibility of component storage and adaptation. When the component is not in use before hoisting, flipping the support frame 3-3 upwards by 90° reduces the overall size of the component, making it easier to store and transport, and avoiding collision damage caused by the protruding support frame 3-3.

[0037] For example, such as Figure 2 As shown, the through grooves on both sides of the sand core body 1 have a certain inclination angle.

[0038] In some examples, the through-slots on both sides of the sand core body 1 have a certain inclination angle. This inclination structure is adapted to the unfolding angle of the support frame 3-3, ensuring that the support frame 3-3 can fully fit the inner wall of the through-slot after unfolding. The inclination through-slot can guide the hoisting assembly 3 to automatically align with the center position when inserted, reducing manual adjustment time.

[0039] In actual use: First, according to the depth of the through grooves on both sides of the sand core body 1, screw the extension rod 3-8 at the lower end of the fixing rod 3-6. With the help of the opposite thread direction of the first thread groove 3-7 and the second thread groove 3-12, adjust the overall length of the fixing rod 3-6 and the extension rod 3-8 to ensure that the component can adapt to the depth of the through groove. Next, screw the locking block 3-9 to the lower end of the extension rod 3-8 through the second thread groove 3-12 of the connecting column 3-11, so that the arc-shaped protrusion 3-10 on the surface of the locking block 3-9 faces the limiting groove 4 at the bottom of the sand core body 1. Then, flip the L-shaped support frame 3-3 in the connecting grooves 3-2 on both sides of the fixing block 3-1 upward (flip 90° around the pin shaft), and slowly align the hoisting component 3 with the through groove of the sand core body 1. Insert the support frame 3-3, and then release it. The spring 3-5 between the notch 3-4 and the support frame 3-3 will rebound, pushing the support frame 3-3 to rotate outward around the pin axis, so that the lower end of the support frame 3-3 is tightly attached to the connecting part of the sand core body 1. Then, gently rotate the hoisting component 3 so that the arc-shaped protrusion 3-10 of the locking block 3-9 is precisely embedded in the limiting groove 4 at the bottom of the sand core body 1, completing the full and stable connection between the component and the sand core body 1. Finally, hang the lifting ring 2 on the hook of the hoisting equipment, start the equipment to smoothly hoist the sand core body 1, and after hoisting to the target position, rotate the component in the opposite direction to make the arc-shaped protrusion 3-10 disengage from the limiting groove 4, flip the support frame 3-3 inward, and slowly pull out the hoisting component 3 to complete one hoisting process of the sand core body 1.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A sand core hoisting fixture, characterized in that, include: The sand core body (1) and the lifting ring (2) are provided on the sand core body (1); Lifting assembly (3), which is mounted on the lifting ring (2); The hoisting assembly (3) includes a fixing block (3-1), which is fixed to the lower end of the lifting ring (2). Both ends of the side surface of the fixing block (3-1) are provided with connecting grooves (3-2). A support frame (3-3) is rotatably connected to the connecting groove (3-2) through a pin. A notch (3-4) is provided on the side end face of the fixing block (3-1). A spring (3-5) is connected between the notch (3-4) and the support frame (3-3).

2. The sand core hoisting fixture according to claim 1, characterized in that, The bottom surface of the fixing block (3-1) is provided with a fixing rod (3-6), and the lower end of the fixing rod (3-6) is provided with a first threaded groove (3-7). An extension rod (3-8) is connected to the first threaded groove (3-7) by threaded screwing. The lower end of the extension rod (3-8) is provided with a locking block (3-9).

3. The sand core hoisting fixture according to claim 2, characterized in that, The surface of the card block (3-9) is provided with an arc-shaped protrusion (3-10), and a connecting post (3-11) is provided on the card block (3-9). A second threaded groove (3-12) is opened at the upper end of the connecting post (3-11), and the connecting post (3-11) is screwed to the lower end of the extension rod (3-8) through the second threaded groove (3-12).

4. The sand core hoisting fixture according to claim 1, characterized in that, The support frame (3-3) has an overall L-shaped structure, and the lower end of the support frame (3-3) can fit into the connection part of the sand core body (1).

5. The sand core hoisting fixture according to claim 3, characterized in that, The bottom ends of the sand core body (1) are provided with limiting grooves (4), and the arc-shaped protrusions (3-10) can fit into the limiting grooves (4).

6. The sand core hoisting fixture according to claim 3, characterized in that, The first threaded groove (3-7) has the opposite thread direction to the second threaded groove (3-12).

7. The sand core hoisting fixture according to claim 1, characterized in that, The support frame (3-3) can be rotated upward by 90° at the pin connection with the connecting groove (3-2).

8. The sand core hoisting fixture according to claim 1, characterized in that, The through grooves on both sides of the main body of the sand core (1) have a certain inclination angle.

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