Sand core hoisting tool based on 3D printing

Abstract

The sand core hoisting tool comprises a connecting base, a limiting sliding groove is formed in the lower portion of the connecting base, two limiting sliding blocks are symmetrically installed in the limiting sliding groove in a sliding mode, clamping arms are fixedly connected to the lower portions of the limiting sliding blocks, and connecting through holes are symmetrically formed in the clamping arms; a connecting rod is slidably installed in the connecting through hole, one end of the connecting rod is fixedly connected with a clamping seat, the connecting rod is sleeved with a return spring, a first threaded sleeve block is installed in the clamping arm in an embedded mode, a threaded adjusting rod is installed in the first threaded sleeve block in a threaded mode, and the end of the threaded adjusting rod is rotationally connected with a touch-press switch. And one side of the clamping seat is connected with a rubber clamping piece. The touch switch can be driven to move by rotating the threaded adjusting rod, so that the distance between the touch switch and the clamping seat is adjusted, the clamping force borne by the sand core is adjusted, and the sand core is effectively prevented from being damaged due to the too large clamping force.

Description

Technical Field

[0001] This utility model relates to a hoisting fixture, and more particularly to a sand core hoisting fixture based on 3D printing. Background Technology

[0002] 3D printing technology, or additive manufacturing, has revolutionized traditional manufacturing, demonstrating significant advantages in many fields. Casting 3D printing technology directly prints sand cores, eliminating the need for mold making, core fabrication, and modeling. Compared to traditional casting sand cores, which cannot have internal core noses for transport, casting 3D printing requires the use of lifting fixtures and overhead cranes for core transfer.

[0003] For example, Chinese Patent Publication No. CN205590147U discloses a 3D-printed sand core lifting fixture. The lifting fixture is I-shaped and includes a lifting handle, a connecting rod, and a lifting rod baffle. The lifting handle is fixedly connected to the lifting rod baffle via the connecting rod, and the lifting handle and lifting rod baffle are on the same horizontal plane. The sand core to be used requires pre-drilled holes on both sides of the sand core, ensuring that the openings of the pre-drilled holes are perpendicular to the lifting handle. The pre-drilled holes are provided with three structures: Structure I, Structure II, and Structure III. The lifting fixture is inserted to the bottom through Structure I, with Structure I having a depth of half the height of the sand core. The diameter of Structure II is the same as the long side of Structure I. The dimensions of Structure III match the lifting rod baffle of the lifting fixture, and Structure III is a positioning groove for the lifting rod baffle. The beneficial effects of this utility model are: solving the problem of lifting 3D-printed sand cores without a core nose; simple operation and convenient use; improved safety factor in sand core lifting; and reduced production costs.

[0004] The existing 3D-printed sand core hoisting fixture has some problems. First, the hoisting fixture needs to be matched with a specified sand core structure, which reduces its applicability. Second, the traditional one-piece molded hoisting handles on the sand core interfere with the lower sand mold during the core lowering process, making it impossible to achieve hoisting throughout the entire process. Furthermore, the handles need to be ground off during use, which affects production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a 3D-printed sand core hoisting fixture to solve the existing problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sand core hoisting fixture based on 3D printing, including a connecting seat, a limiting groove is formed below the connecting seat, two limiting sliders are symmetrically slidably installed in the limiting groove, a clamping arm is fixedly connected below the limiting slider, a connecting through hole is symmetrically formed in the clamping arm, a connecting rod is slidably installed in the connecting through hole, a clamping seat is fixedly connected to one end of the connecting rod, a return spring is sleeved on the connecting rod, a first threaded sleeve is embedded in the clamping arm, a threaded adjusting rod is threadedly installed in the first threaded sleeve, a touch switch is rotatably connected to the end of the threaded adjusting rod, and a rubber clamping component is connected to one side of the clamping seat.

[0007] Preferably, a bidirectional threaded screw is rotatably installed in the limiting slide groove, and a threaded through hole is opened in the limiting slider, the threaded through hole being threadedly engaged with the bidirectional threaded screw.

[0008] Preferably, the connecting seat is symmetrically fixed with lifting lugs, and a drive motor is fixedly fixed to one side of the connecting seat. The output end of the drive motor is fixedly connected to a bidirectional threaded screw.

[0009] Preferably, the clamping seat has a second limiting groove, a threaded rod is rotatably installed in the second limiting groove, and a fixing plate is fixedly connected to one side of the clamping seat.

[0010] Preferably, a second limiting slider is slidably installed in the second limiting groove, a second threaded sleeve is embedded in the second limiting slider, the second threaded sleeve is threadedly engaged with the threaded rod, a sliding clamp is fixedly connected to one side of the second limiting slider, and a plurality of limiting protrusions are fixedly connected to the lower part of the sliding clamp.

[0011] Preferably, a connecting bracket is fixedly connected to one side of the rubber clamp, and the connecting bracket has a plurality of snap-fit ​​holes, which cooperate with the limiting protrusions.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. By rotating the threaded adjusting rod, the pressure switch can be moved, thereby adjusting the distance between the pressure switch and the clamping seat, and thus adjusting the clamping force on the sand core, effectively avoiding damage to the sand core due to excessive clamping force.

[0014] 2. By using a method of clamping sand cores on both sides, sand cores can be clamped and lifted without the need for a lifting handle or core nose. When lifting different sand cores, it is necessary to rotate the threaded rod to move the sliding clamp plate up to remove the restriction on the connecting bracket. At this time, the rubber clamp can be easily removed and replaced with a rubber clamp that matches the shape of the sand core, thus improving applicability. Attached Figure Description

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a partial exploded view of the present invention;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Connecting seat; 101. Lifting lug; 102. Limiting groove; 103. Bidirectional threaded screw; 104. Drive motor; 2. Clamping arm; 201. Limiting slider; 202. Threaded through hole; 203. Connecting through hole; 204. First threaded sleeve; 205. Threaded adjusting rod; 206. Touch switch; 3. Clamping seat; 301. Fixed clamping plate; 302. Connecting rod; 303. Return spring; 304. Second limiting groove; 305. Threaded rod; 4. Rubber clamping component; 401. Connecting card seat; 402. Snap-fit ​​hole; 5. Sliding clamping plate; 501. Second limiting slider; 502. Second threaded sleeve; 503. Limiting protrusion. Detailed Implementation

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

[0021] Please see Figure 1-4 This utility model provides a technical solution: a sand core hoisting fixture based on 3D printing, including a connecting seat 1, a limiting groove 102 is opened on the bottom of the connecting seat 1, two limiting sliders 201 are symmetrically slidably installed in the limiting groove 102, a clamping arm 2 is fixedly connected to the bottom of the limiting slider 201, a connecting through hole 203 is symmetrically opened in the clamping arm 2, a connecting rod 302 is slidably installed in the connecting through hole 203, a clamping seat 3 is fixedly connected to one end of the connecting rod 302, a return spring 303 is sleeved on the connecting rod 302, a first threaded sleeve block 204 is embedded in the clamping arm 2, a threaded adjusting rod 205 is threadedly installed in the first threaded sleeve block 204, a touch switch 206 is rotatably connected to the end of the threaded adjusting rod 205, and a rubber clamping part 4 is connected to one side of the clamping seat 3.

[0022] In this embodiment, the limiting slider 201 is slidably installed inside the limiting groove 102, thereby slidably connecting the clamping arm 2 to the bottom of the connecting seat 1. Adjusting the distance between the two clamping arms 2 causes the clamping arm 2 to move, which in turn causes the clamping seat 3 to move. The movement of the clamping seat 3 causes the rubber clamping component 4 to move. The rubber clamping component 4 is a rubber pad that fits against the surface of the sand core. This increases the contact area between the device and the surface of the sand core during the clamping process, preventing localized damage to the sand core. Furthermore, the rubber clamping component 4 is made entirely of rubber, replacing the clamping seat 3 in contact with the sand core, thus preventing scratches and damage to the surface of the sand core. When the rubber clamping component 4 contacts the surface of the sand core, the return spring 303 is compressed. Since forces are mutual... The spring 303 will exert a pushing force on the clamping seat 3, and the return spring 303 will drive the rubber clamping part 4 to clamp and fix the sand core. When the return spring 303 is compressed, the distance between the clamping arm 2 and the clamping seat 3 will decrease. When the pressure switch 206 contacts the clamping seat 3, the pressure switch 206 will send a signal to stop the movement of the two clamping arms 2. Rotating the threaded adjusting rod 205 can drive the pressure switch 206 to move, thereby adjusting the distance between the pressure switch 206 and the clamping seat 3. According to the spring force formula F=K*X, where X is the distance between the pressure switch 206 and the clamping seat 3, the clamping force on the sand core can be controlled and adjusted, effectively avoiding damage to the sand core due to excessive clamping force.

[0023] In order to achieve the purpose of adjusting the distance between the two limit sliders 201, the device adopts the following technical solution: a bidirectional threaded screw 103 is rotatably installed in the limit slide groove 102, a threaded through hole 202 is opened in the limit slider 201, the threaded through hole 202 is threadedly engaged with the bidirectional threaded screw 103, a lifting lug 101 is symmetrically fixed on the connecting seat 1, a drive motor 104 is fixedly fixed on one side of the connecting seat 1, and the output end of the drive motor 104 is fixedly connected to the bidirectional threaded screw 103.

[0024] By starting the drive motor 104, the bidirectional threaded screw 103 can be rotated. The bidirectional threaded screw 103 is threadedly engaged with the threaded through hole 202. The rotation of the bidirectional threaded screw 103 can drive the two limit sliders 201 to move. The distance between the limit sliders 201 can be adjusted. The lifting lug 101 can be used to connect with the bucket, thereby connecting the device with equipment such as overhead cranes.

[0025] To facilitate the replacement of the rubber clamping component 4, the device employs the following technical solution: a second limiting groove 304 is provided in the clamping seat 3, a threaded rod 305 is rotatably installed in the second limiting groove 304, a fixed clamping plate 301 is fixedly connected to one side of the clamping seat 3, a second limiting slider 501 is slidably installed in the second limiting groove 304, a second threaded sleeve 502 is embedded in the second limiting slider 501, the second threaded sleeve 502 is threadedly engaged with the threaded rod 305, a sliding clamping plate 5 is fixedly connected to one side of the second limiting slider 501, several limiting protrusions 503 are fixedly connected below the sliding clamping plate 5, a connecting card seat 401 is fixedly connected to one side of the rubber clamping component 4, several locking holes 402 are provided in the connecting card seat 401, and the locking holes 402 cooperate with the limiting protrusions 503.

[0026] The threaded rod 305 engages with the second threaded sleeve 502. Rotating the threaded rod 305 can move the second limiting slider 501. The movement of the second limiting slider 501 can move the sliding clamp 5. It cooperates with the fixed clamp 301 of the sliding clamp 5 to clamp and fix the connecting bracket 401. At the same time, the limiting protrusion 503 is inserted into the snap-fit ​​hole 402 to further restrict and fix the connecting bracket 401 between the sliding clamp 5 and the fixed clamp 301. When hoisting different sand cores, it is necessary to rotate the threaded rod 305 to move the sliding clamp 5 upward to remove the restriction on the connecting bracket 401. At this time, the rubber clamp 4 can be easily removed and replaced with a rubber clamp 4 that matches the shape of the sand core.

[0027] The working principle and usage process of this utility model are as follows: When in use, the threaded rod 305 needs to be rotated to move the sliding clamp 5 upward, releasing the restriction on the connecting seat 401. This is then removed and replaced with a rubber clamping part 4 that matches the shape of the sand core. The device is then moved to the sand core, and the drive motor 104 is started to rotate the bidirectional threaded screw 103. The rotation of the bidirectional threaded screw 103 causes the two clamping arms 2 to move closer together. The movement of the clamping arms 2 causes the rubber clamping part 4 to adhere to the surface of the sand core. As the clamping arms 2 continue to move closer, the distance between the clamping arms 2 and the clamping seat 3 decreases, and the return spring 303 is compressed. Since forces are mutual, the return spring 303 applies the same thrust to the clamping seat 3. When the pressure switch 206 contacts the clamping seat 3, the pressure switch 206 sends a signal to stop the drive motor 104, clamping and fixing the sand core between the two rubber clamping parts 4. The device can then be lifted using a crane or similar equipment, and the sand core transported along with it.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3D-printed sand core hoisting fixture, comprising a connecting seat (1), characterized in that: The connecting seat (1) has a limiting groove (102) below it. Two limiting sliders (201) are symmetrically slidably installed in the limiting groove (102). A clamping arm (2) is fixedly connected below the limiting slider (201). A connecting through hole (203) is symmetrically opened in the clamping arm (2). A connecting rod (302) is slidably installed in the connecting through hole (203). A clamping seat (3) is fixedly connected to one end of the connecting rod (302). A return spring (303) is sleeved on the connecting rod (302). A first threaded sleeve block (204) is embedded in the clamping arm (2). A threaded adjusting rod (205) is threadedly installed in the first threaded sleeve block (204). A touch switch (206) is rotatably connected to the end of the threaded adjusting rod (205). A rubber clamping component (4) is connected to one side of the clamping seat (3).

2. The sand core hoisting fixture based on 3D printing according to claim 1, characterized in that: A bidirectional threaded screw (103) is rotatably installed in the limiting slide groove (102), and a threaded through hole (202) is opened in the limiting slider (201), and the threaded through hole (202) is threadedly engaged with the bidirectional threaded screw (103).

3. The sand core hoisting fixture based on 3D printing according to claim 2, characterized in that: The connecting seat (1) is symmetrically fixed with lifting lugs (101), and a drive motor (104) is fixedly fixed on one side of the connecting seat (1). The output end of the drive motor (104) is fixedly connected to a bidirectional threaded screw (103).

4. The sand core hoisting fixture based on 3D printing according to claim 1, characterized in that: The clamping seat (3) is provided with a second limiting groove (304), and a threaded rod (305) is rotatably installed in the second limiting groove (304). A fixing plate (301) is fixedly connected to one side of the clamping seat (3).

5. A sand core hoisting fixture based on 3D printing according to claim 4, characterized in that: A second limiting slider (501) is slidably installed in the second limiting groove (304). A second threaded sleeve (502) is embedded in the second limiting slider (501). The second threaded sleeve (502) is threadedly engaged with the threaded rod (305). A sliding clamp (5) is fixedly connected to one side of the second limiting slider (501). Several limiting protrusions (503) are fixedly connected to the bottom of the sliding clamp (5).

6. The sand core hoisting fixture based on 3D printing according to claim 5, characterized in that: The rubber clamp (4) is fixedly connected to a connecting card seat (401) on one side. The connecting card seat (401) has several snap-fit ​​holes (402) inside, and the snap-fit ​​holes (402) cooperate with the limiting protrusions (503).

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