Sand core lifting appliance

Abstract

The utility model provides a sand core hanger which comprises a first clamping arm, a second clamping arm and a tension spring, the first clamping arm is hinged with the second clamping arm, one end of the first clamping arm and one end of the second clamping arm are respectively provided with a clamping block, and the two clamping blocks are oppositely arranged. One end of the two opposite ends of the tension spring is matched with the first clamping arm, the other end of the tension spring is matched with the second clamping arm and drives the two clamping blocks to be close to each other, a first operating rod is further arranged on the first clamping arm and extends in the direction away from the clamping blocks, and a second operating rod is arranged on the second clamping arm and extends in the direction away from the clamping blocks. When one end of the first operating rod away from the first clamping arm and one end of the second operating rod away from the second clamping arm are close to each other, the two clamping blocks are away from each other. The sand core grabbing and releasing tool solves the technical problem that when an existing tool grabs and releases a sand core, an operator needs to make close contact with the sand core, and the technical effects that the operator is prevented from making close contact with the sand core, and the personal safety of the operator is guaranteed are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting appliance technical field especially relates to a sand core lifting appliance. BACKGROUND

[0002] Sand core is a kind of foundry auxiliary material, mainly by quartz sand, water glass, swelling agent and other raw materials are made, usually according to the requirement of casting production, for manufacturing the casting of complex internal cavity. Since the temperature of sand core is higher when it is taken out from mould in the casting process, in order to avoid the direct contact between operator and sand core, lifting appliance is needed to carry sand core.

[0003] The utility model discloses a kind of tool for hoisting sand core, including guide support assembly, articulated link assembly;Guide support assembly includes located upper pull block, located lower for with the middle part of the sand core to be hoisted corresponding cooperation block, pull block upper surface is equipped with lifting ring, cooperation block is U-shaped structure, including two long sides located front and back, short side connected in the lower part of two long sides, cooperation block left and right sides are for the clearance slot of hinge link assembly clearance, two long side lower parts are equipped with waist-shaped hole, pull block is connected between cooperation block through connecting piece;Articulated link assembly includes at least two pairs of sequentially articulated link, the hinge joint of the link in first end is connecting piece, the middle part of the link in terminal is hinged in the waist-shaped hole of two long side lower parts, the end of the link in terminal is equipped with clamping jaw. The tool for hoisting sand core described above cooperation flexible sling or single-arm crane can realize the quick transfer of sand core, it is convenient and safe when transferring, avoid the situation of damaging sand core.

[0004] When the tool for hoisting sand core disclosed in the above utility model patent is used to grab and release sand core, it is needed to pull up the ring on link one to make link two open, and operator needs to move to the position close to tool and sand core to contact sand core at close range when operating ring, since the temperature of sand core is higher, operator needs to keep distance from sand core to avoid scalding, leading to inconvenient operation, and the heat emitted by sand core will also cause operator discomfort. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model provides a sand core lifting appliance, which solves the problem that the operator needs to contact the sand core at close range when the tool grabs and releases the sand core in the prior art.

[0006] According to the embodiment of the utility model, a kind of sand core lifting appliance, including first clamping arm, second clamping arm and tension spring, the first clamping arm is hinged with the second clamping arm, and one end of the first clamping arm and one end of the second clamping arm are respectively provided with clamping block and two the clamping block is oppositely arranged, one end of the opposite ends in the extension direction of the tension spring is matched with the first clamping arm, the other end is matched with the second clamping arm and drives two the clamping block is mutually close, first operating lever is further provided on the first clamping arm and the first operating lever extends in the direction away from the clamping block, second operating lever is provided on the second clamping arm, and the second operating lever extends in the direction away from the clamping block and is arranged side by side with the first operating lever, when one end of the first operating lever away from the first clamping arm and one end of the second operating lever away from the second clamping arm are mutually close, two the clamping block is mutually far away.

[0007] Further, the first clamping arm is provided with a slot for the second clamping arm to pass through, and a connecting pin is arranged in the slot.

[0008] Further, the first clamping arm and the second clamping arm are respectively provided with a mounting groove and a mounting hole communicated with the mounting groove, the clamping block is provided with a connecting block matched with the mounting groove, and the connecting block is provided with a through hole aligned with the mounting hole.

[0009] Further, the clamping block is respectively provided with a tooth-shaped part, and the tooth-shaped part is located on one side of two the clamping block mutually close.

[0010] Further, the first clamping arm and the second clamping arm are respectively provided with a connecting column, and the connecting column is provided with a through hole, and the opposite ends in the extension direction of the tension spring are respectively provided with a hook, and the hook is matched with the through hole one by one.

[0011] Further, it further includes a lifting ring, one end of the first clamping arm away from the clamping block and one end of the second clamping arm away from the clamping block are respectively provided with a connecting ring, and a chain is arranged between the lifting ring and the connecting ring.

[0012] Further, one end of the first operating lever away from the first clamping arm and one end of the second operating lever away from the second clamping arm are respectively provided with a handle, and an anti-skid line is arranged on the outer peripheral wall of the handle.

[0013] Further, the first clamping arm is provided with a first sleeve, and the first sleeve is provided with a rotatable lock tongue; the second clamping arm is provided with a second sleeve, and the second sleeve is provided with a rotatable lock sleeve; the lock sleeve is provided with a containing groove for containing the lock tongue and an oblong hole communicated with the containing groove; the lock tongue is provided with a threaded rod and a locking knob matched with the threaded rod; the threaded rod passes through the oblong hole, and the locking knob is in abutment with the lock sleeve.

[0014] Further, the edge of the locking knob is provided with a pushing piece extending away from the threaded rod.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the sand core is clamped by the clamping blocks arranged on the first clamping arm and the second clamping arm respectively; the operator operates the first operating rod and the second operating rod to make the end of the first operating rod away from the first clamping arm and the end of the second operating rod away from the second clamping arm approach each other, at this time, the first clamping arm and the second clamping arm produce relative rotation and drive the two clamping blocks to move away from each other, the sand core lifting appliance can be opened, and the structure such as the rib on the sand core can be placed between the two clamping blocks; when the sand core lifting appliance is opened, the tension spring is further stretched; after the sand core is placed between the two clamping blocks, releasing at least one of the first operating rod and the second operating rod releases the tension spring to restore the original length, so that the first clamping arm and the second clamping arm produce relative rotation and drive the two clamping blocks to approach each other until abutting against the sand core; and the sand core can be clamped between the two clamping blocks by the elastic force provided by the tension spring, so that the sand core lifting appliance is fixed on the sand core, and the sand core can be carried by hoisting the sand core lifting appliance; when the operator operates the first operating rod and the second operating rod to open the sand core lifting appliance, the operator can keep a certain distance from the sand core, which solves the technical problem that the operator needs to be in close contact with the sand core when the existing tooling device grabs and releases the sand core, avoids the close contact between the operator and the sand core, and ensures the personal safety of the operator; and the operation is simple and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the sand core lifting appliance of an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic view of the sand core lifting appliance of an embodiment of the utility model;

[0018] Figure 3 It is Figure 2 It is an enlarged view of A in the middle.

[0019] In the above drawings: 1, first clamping arm; 11, first operating rod; 12, slot; 13, connecting pin; 14, mounting groove; 15, connecting column; 16, via hole; 17, connecting ring; 2, second clamping arm; 21, second operating rod; 3, tension spring; 31, hook; 4, clamping block; 41, connecting block; 42, tooth-shaped part; 5, lifting ring; 51, chain; 6, handle; 61, anti-skid pattern; 7, first sleeve; 71, lock tongue; 72, threaded rod; 73, locking knob; 74, actuating piece; 8, second sleeve; 81, lock sleeve; 82, accommodating groove; 83, oblong hole. DETAILED DESCRIPTION

[0020] The technical solutions in the utility model will be further described below with reference to the drawings and examples.

[0021] As Figures 1 to 3 shown in the utility model embodiment, a sand core lifting appliance is provided for taking out high-temperature sand cores from a mold and carrying them to a designated position during a casting process.

[0022] Please refer to Figure 1 and Figure 2 , the sand core lifting appliance comprises a first clamping arm 1, a second clamping arm 2 and a tension spring 3, wherein the first clamping arm 1 is hinged to the second clamping arm 2, one end of the first clamping arm 1 and one end of the second clamping arm 2 are respectively provided with clamping blocks 4 and the two clamping blocks 4 are oppositely arranged, one end of the tension spring 3 in the extension direction is matched with the first clamping arm 1 and the other end is matched with the second clamping arm 2 and drives the two clamping blocks 4 to approach each other, the first clamping arm 1 is further provided with a first operating rod 11 extending away from the clamping blocks 4, the second clamping arm 2 is provided with a second operating rod 21 extending away from the clamping blocks 4 and arranged side by side with the first operating rod 11, when one end of the first operating rod 11 away from the first clamping arm 1 and one end of the second operating rod 21 away from the second clamping arm 2 approach each other, the two clamping blocks 4 move away from each other, by operating the first operating rod 11 and the second operating rod 21, the first clamping arm 1 and the second clamping arm 2 can be relatively rotated to drive the two clamping blocks 4 to move away from each other, at this time, the sand core lifting appliance is opened, and after releasing at least one of the first operating rod 11 and the second operating rod 21, the first clamping arm 1 and the second clamping arm 2 will be relatively rotated under the drive of the tension spring 3 to drive the two clamping blocks 4 to approach each other, at this time, the sand core lifting appliance is clamped.

[0023] Specifically, the operation steps for handling sand cores using the sand core lifting tool provided in this embodiment are as follows: The operator operates the first operating rod 11 and the second operating rod 21 respectively, so that the end of the first operating rod 11 away from the first clamping arm 1 and the end of the second operating rod 21 away from the second clamping arm 2 move closer to each other. The first clamping arm 1 and the second clamping arm 2 rotate relative to each other, causing the two clamping blocks 4 to move away from each other. At this time, the sand core lifting tool opens and moves to place the ribs and other structures on the sand core between the two clamping blocks 4, and the sand core lifting tool opens... When the sand core is inserted, the tension spring 3 is further stretched. After the sand core is placed between the two clamping blocks 4, the operator releases at least one of the first operating lever 11 and the second operating lever 21. The tension spring 3 returns to its original length and drives the first clamping arm 1 and the second clamping arm 2 to rotate relative to each other, causing the two clamping blocks 4 to move closer to each other until they abut against both sides of the sand core. The elastic force provided by the tension spring 3 clamps the sand core between the two clamping blocks 4, thus fixing the sand core lifting device onto the sand core. At this time, the sand core lifting device can be lifted to transport the sand core along with the sand core to the designated location. When using the sand core lifting device provided in this embodiment, the operator can control the opening or clamping of the sand core lifting device by operating the first operating lever 11 and the second operating lever 21. During the operation, a certain distance can be maintained from the sand core, avoiding close contact between the operator and the sand core, thereby ensuring the operator's personal safety and reducing the discomfort caused by the heat emitted by the sand core. At the same time, the sand core lifting device is simple and convenient to operate.

[0024] like Figure 2 As shown, the first clamping arm 1 has a slot 12 for the second clamping arm 2 to pass through, and a connecting pin 13 is provided in the slot 12. The second clamping arm 2 has a connecting hole that mates with the connecting pin 13. When assembling the first clamping arm 1 and the second clamping arm 2, the second clamping arm 2 is first inserted into the slot 12, and then the connecting pin 13 is inserted into the slot 12 and then into the connecting hole, so that the first clamping arm 1 and the second clamping arm 2 can be hinged together, which facilitates the assembly of the sand core lifting tool.

[0025] Please combine Figure 1 and Figure 2The first clamping arm 1 and the second clamping arm 2 are respectively provided with a mounting groove 14 and a mounting hole communicating with the mounting groove 14. The clamping block 4 is provided with a connecting block 41 that cooperates with the mounting groove 14, and the connecting block 41 is provided with a through hole aligned with the mounting hole. The clamping block 4 is positioned by the cooperation of the connecting block 41 with the mounting groove 14, and after the connecting block 41 is inserted into the mounting groove 14, the through hole is aligned with the mounting hole. The connecting block 41 can be locked in the mounting groove 14 using threaded fasteners such as matching bolts and nuts, ensuring a reliable connection between the clamping block 4 and the first clamping arm 1 or the second clamping arm 2. Furthermore, the clamping block 4 is detachably connected to the first clamping arm 1 or the second clamping arm 2, so as to replace the appropriate clamping block 4 according to the shape of the sand core, thereby improving the versatility of the sand core lifting tool.

[0026] In detail, each of the clamping blocks 4 is provided with a toothed portion 42, which is located on the side of the two clamping blocks 4 that are close to each other. When the clamping blocks 4 clamp the sand core, the toothed portion 42 is in direct contact with the surface of the sand core to increase the friction between the clamping blocks 4 and the sand core and prevent the sand core from falling off the sand core lifting device during transportation.

[0027] like Figure 2 As shown, the first clamping arm 1 and the second clamping arm 2 are respectively provided with connecting posts 15, and the connecting posts 15 are provided with through holes 16. The tension spring 3 is provided with hooks 31 at opposite ends in the extension direction, and the hooks 31 are respectively engaged with the through holes 16. By providing the connecting posts 15 on the first clamping arm 1 and the second clamping arm 2 for the installation of the tension spring 3, and by having the hooks 31 at both ends of the tension spring 3 respectively engage with the through holes 16 on the connecting posts 15, the connection between the tension spring 3 and the first clamping arm 1 and the second clamping arm 2 is stable, preventing the tension spring 3 from detaching from the first clamping arm 1 or the second clamping arm 2 when the sand core lifting tool is opened or clamped, thus avoiding malfunction of the sand core lifting tool.

[0028] Please refer to Figure 1 and Figure 2 The sand core lifting device also includes a lifting ring 5. A connecting ring 17 is provided at the end of the first clamping arm 1 away from the clamping block 4 and at the end of the second clamping arm 2 away from the clamping block 4, respectively. A chain 51 is provided between the lifting ring 5 and the connecting ring 17. The connecting ring 17 is provided at both ends of the first clamping arm 1 and the second clamping arm 2, and the chain 51 connects the lifting ring 5 and the connecting ring 17. The lifting ring 5 is used to cooperate with the hook 31 of a gantry crane or other lifting equipment to suspend the sand core lifting device on the lifting equipment, facilitating the handling of the sand core clamped by the sand core lifting device using the lifting equipment.

[0029] Specifically, handles 6 are respectively fitted onto the end of the first operating lever 11 away from the first clamping arm 1 and the end of the second operating lever 21 away from the second clamping arm 2. The outer peripheral wall of the handle 6 is provided with anti-slip texture 61. The handles 6 are used to wrap around the ends of the first clamping arm 1 and the second clamping arm 2 to enhance the comfort of the first operating lever 11 and the second operating lever 21, making it easier for the operator to grip them. The anti-slip texture 61 on the handle 6 increases the friction between the operator's hand and the first operating lever 11 and the second operating lever 21, preventing the operator from slipping when operating the sand core lifting tool.

[0030] Please combine Figure 2 and Figure 3 The first clamping arm 1 is provided with a first sleeve 7 and a rotatable locking tongue 71 on the first sleeve 7. The second clamping arm 2 is provided with a second sleeve 8 and a rotatable locking sleeve 81 on the second sleeve 8. The locking sleeve 81 is provided with a receiving groove 82 for accommodating the locking tongue 71 and an elongated hole 83 communicating with the receiving groove 82. The locking tongue 71 is provided with a threaded rod 72 and a locking knob 73 that cooperates with the threaded rod 72. The threaded rod 72 passes through the elongated hole 83 and the locking knob 73 abuts against the locking sleeve 81. When the operator opens or clamps the sand core lifting device, the locking tongue 71 rotates relative to the first sleeve 7 and the locking sleeve 81 rotates relative to the second sleeve 8 as the first clamping arm 1 and the second clamping arm 2 move. Simultaneously, the locking tongue 71 slides within the locking sleeve 81, causing the threaded rod 72 to move within the elongated hole 83. After the sand core lifting device clamps the sand core, rotating the locking knob 73 moves it axially along the threaded rod 72 until the locking knob 73 abuts against the locking sleeve 81, thus allowing the sand core to pass through the locking mechanism. The friction between the locking knob 73 and the locking sleeve 81 locks the relative positions of the first clamping arm 1 and the second clamping arm 2, thereby locking the sand core lifting tool and keeping it in the position where the sand core is clamped, preventing the sand core lifting tool from loosening during transportation. When the sand core is transported to a designated position and the sand core lifting tool needs to be separated from the sand core, the locking knob 73 is rotated to move the locking knob 73 axially along the threaded rod 72 and away from the locking sleeve 81. At this time, the first clamping arm 1 and the second clamping arm 2 can rotate relative to each other, thereby unlocking the sand core lifting tool. The operation is simple.

[0031] In this embodiment, the locking knob 73 is provided with an actuating piece 74 on its edge, which extends away from the threaded rod 72. The operator can easily rotate the locking knob 73 by operating the actuating piece 74 on its edge, causing the locking knob 73 to move on the threaded rod 72 and closer to or further away from the locking sleeve 81, thereby facilitating the locking or unlocking of the sand core lifting tool.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model 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 utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sand core hanger characterized by: The utility model provides a clamping device, which comprises a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are hinged, one end of the first clamping arm and one end of the second clamping arm are respectively provided with clamping blocks, and the two clamping blocks are oppositely arranged, one end of the opposite two ends of the tension spring in the extension direction is matched with the first clamping arm, the other end is matched with the second clamping arm and drives the two clamping blocks to approach each other, a first operating rod is further arranged on the first clamping arm and extends away from the clamping block, a second operating rod is arranged on the second clamping arm, the second operating rod extends away from the clamping block and is arranged side by side with the first operating rod, and when one end of the first operating rod away from the first clamping arm and one end of the second operating rod away from the second clamping arm approach each other, the two clamping blocks are away from each other.

2. A core hanger as defined in claim 1, wherein: A slot is arranged on the first clamping arm for the second clamping arm to pass through, and a connecting pin is arranged in the slot.

3. A core hanger as defined in claim 1 wherein: Mounting grooves and mounting holes communicating with the mounting grooves are respectively arranged on the first clamping arm and the second clamping arm, connecting blocks matched with the mounting grooves are arranged on the clamping blocks, and through holes aligned with the mounting holes are arranged on the connecting blocks.

4. A core hanger as defined in claim 1 wherein: Tooth-shaped parts are respectively arranged on the clamping blocks and are located on the side of the two clamping blocks approaching each other.

5. A core hanger as defined in claim 1 wherein: Connecting columns are respectively arranged on the first clamping arm and the second clamping arm, and through holes penetrating the connecting columns are arranged on the connecting columns, hooks are respectively arranged on the opposite two ends of the tension spring in the extension direction, and the hooks are matched with the through holes one by one.

6. A core hanger as defined in claim 1 wherein: A lifting ring is further arranged, connecting rings are respectively arranged on one end of the first clamping arm away from the clamping block and one end of the second clamping arm away from the clamping block, and chains are respectively arranged between the lifting ring and the connecting rings.

7. A core hanger as defined in claim 1 wherein: Handles are respectively arranged on one end of the first operating rod away from the first clamping arm and one end of the second operating rod away from the second clamping arm, and anti-skid lines are arranged on the outer peripheral walls of the handles.

8. A core hanger as defined in claim 1 wherein: A first sleeve is arranged on the first clamping arm, a lock tongue rotatable is arranged on the first sleeve, a second sleeve is arranged on the second clamping arm, a lock sleeve rotatable is arranged on the second sleeve, a receiving groove accommodating the lock tongue and an oblong hole communicating with the receiving groove are arranged on the lock sleeve, a threaded rod and a locking knob matched with the threaded rod are arranged on the lock tongue, the threaded rod penetrates the oblong hole, and the locking knob is in abutment with the lock sleeve.

9. A core hanger as claimed in claim 8, wherein: An edge of the locking knob is provided with a pushing piece extending away from the threaded rod.

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