Lifting tool for circular workpiece

Abstract

The utility model belongs to the technical field of engineering machinery, and discloses a lifting tool for a circular workpiece, which specifically comprises a mounting frame, a first L-shaped clamping part, a second L-shaped clamping part and a locking mechanism, the first L-shaped clamping part and the second L-shaped clamping part are arranged at the two ends of the mounting frame; the first L-shaped clamping part comprises a vertical section A and a transverse section A, the vertical section A is hinged to one end of the mounting frame, and the transverse section A is connected to the lower end of the vertical section A; a locking mechanism is connected between the vertical section A and the hanging bracket and used for limiting rotation of the first L-shaped clamping part. The device can be self-locked through the locking mechanism during transportation, so that the clamping stability is ensured, and the circular workpiece is prevented from falling off; in addition, the arranged positioning screw rod can position the workpiece, and the pressing spring plays a role in fixing the workpiece; the pad body and the flexible sleeve can prevent the surface of the workpiece from being scratched, in the whole production process, the labor intensity of workers is relieved, the generation probability of accidental waste products is reduced, and the working and production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to a lifting tool for circular workpieces. Background Art

[0002] In the daily machining production of circular workpieces, it is often necessary to carry them at least 2 to 3 times. For mass-produced workpieces weighing 20 to 40 kg, manual handling has too high labor intensity. Therefore, in order to reduce the labor intensity of operators and ensure their safety, a cantilever crane is often equipped beside the machine tool to assist in lifting workpieces. Due to the requirements of the processing technology, obvious scratches should not be left on the workpiece due to clamping and lifting. In the prior art, whether it is a magnetic chuck or a clamping structure such as a claw type, the structure is relatively complex, the cost is relatively high, and it is difficult to avoid leaving obvious scratches on the workpiece while maintaining sufficient clamping force, which does not meet the production requirements, is not conducive to the subsequent processing and use of the workpiece, and affects production efficiency. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a lifting tool for small circular workpieces, which has a simple structure and operation method, is applicable to round solid and ring-shaped workpieces, can quickly, safely and efficiently clamp workpieces, and avoid obvious scratch defects caused by the lifting tool on the workpiece surface, reduce the labor intensity of workers, reduce the generation of accidental waste products, and improve work and production efficiency.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides a lifting tool for circular workpieces, which includes a mounting frame, a first L-shaped clamping part, a second L-shaped clamping part and a locking mechanism; a hanging frame for connecting with the hook of a crane is arranged at the upper part of the mounting frame; the first L-shaped clamping part is arranged at one end of the mounting frame, and the second L-shaped clamping part is arranged at the other end of the mounting frame relative to the first L-shaped clamping part; the first L-shaped clamping part includes a vertical section A and a horizontal section A, the upper end of the vertical section A is hinged to one end of the mounting frame through a first shaft body, and the horizontal section A is connected to the lower end of the vertical section A for clamping circular workpieces; the second L-shaped clamping part includes a vertical section B and a horizontal section B, the upper end of the vertical section B is fixedly connected to the mounting frame, and the horizontal section B is connected to the lower end of the vertical section B for clamping circular workpieces; a locking mechanism is connected between the upper end of the vertical section A and the hanging frame, and the locking mechanism is used to limit the rotation of the first L-shaped clamping part and keep the first L-shaped clamping part in the clamping state.

[0006] As a further improvement of the above solution, at least one connecting ring A is fixedly arranged at the upper end of the vertical section A, at least one connecting ring B is fixedly arranged at one end of the mounting frame connected to the vertical section A, and the connecting ring A and the connecting ring B are connected to a first shaft body.

[0007] As a further improvement of the above solution, the locking mechanism includes a connecting section A, a connecting section B, a second shaft body and a locking block. One end of the connecting section A is fixedly connected to the connecting ring A, a connecting ring C is fixedly arranged at the other end of the connecting section A, a connecting ring D is fixedly arranged at one end of the connecting section B, a locking block is arranged on the hanging frame, a locking groove that can cooperate with the locking block is formed at the other end of the connecting section B, and the connecting ring C and the connecting ring D are both connected to the second shaft body.

[0008] As a further improvement of the above solution, a positioning screw A is threadedly connected to the vertical section A, a positioning screw B is threadedly connected to the vertical section B, compression springs are arranged inside both the vertical section A and the vertical section B, the two compression springs are respectively sleeved outside the positioning screw A and the positioning screw B, pads are arranged at the opposite ends of the two compression springs, and the other ends are respectively fixedly connected to the vertical section A and the vertical section B.

[0009] As a further improvement of the above solution, a limiting ring is further arranged on the locking block, the limiting ring is connected to a limiting member, and the limiting member is used to block the upward flipping of the connecting section B.

[0010] As a further improvement of the above solution, a handle A is arranged at the outer end of the positioning screw A located outside the vertical section A, and a handle B is arranged on the connecting section B.

[0011] As a further improvement of the above solution, an extension ring A is arranged on the vertical section A corresponding to the positioning screw A, and an extension ring B is arranged on the vertical section B corresponding to the positioning screw B.

[0012] As a further improvement of the above solution, the hanging frame is a triangular frame, the lower end of the triangular frame is connected to the upper part of the mounting frame, a hanging hole for connecting to the hook of the crane is arranged at the upper end of the triangular frame, and the locking block is arranged on the inclined frame on one side of the triangular frame close to the connecting section B.

[0013] As a further improvement of the above solution, both the first shaft body and the second shaft body are threaded shafts; arc-shaped grooves are formed at the opposite ends of the transverse section A and the transverse section B; a hook is arranged on the outer side of the second L-shaped clamping portion, and the hook is used for hanging a counterweight.

[0014] As a further improvement of the above solution, flexible sleeves are sleeved on the opposite ends of the transverse section A and the transverse section B.

[0015] The beneficial effects of the present utility model are:

[0016] Compared with the prior art, the present device uses a hanging bracket, a first L-shaped clamping part and a second L-shaped clamping part to cooperate with manual labor and a crane to complete the clamping and transportation of circular parts. The hinge connection between the first L-shaped clamping part and the mounting frame enables the first L-shaped clamping part to rotate and open, facilitating the clamping of circular workpieces from top to bottom and from bottom to top; the setting of the locking mechanism enables the device to be self-locked during transportation, ensuring the stability of clamping and preventing the accidental detachment of circular workpieces; the setting of positioning screw A and positioning screw B can position the position of the circular workpiece, making it in a position close to the center or a suitable center of gravity during the workpiece loading stage and transportation stage, and the compression spring can squeeze the side of the circular workpiece to fix the circular workpiece; the setting of the cushion body can prevent scratches on the surface of the circular workpiece during positioning or extrusion; the setting of the flexible sleeve can prevent scratches on other positions of the circular workpiece when placing or transporting it.

[0017] In addition, the materials used in the manufacture of the present device are convenient, the structure and operation mode are simple, it is applicable to workpieces with solid round cake shapes and ring shapes, can quickly, safely and efficiently clamp workpieces, and avoid obvious scratch defects caused by lifting tools and tooling on the workpiece surface, reducing the labor intensity of workers, reducing the probability of accidental waste products, and improving work and production efficiency. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] Figure 2 is a schematic structural view of the present utility model from another perspective;

[0020] Figure 3 is a front structural view of the present utility model;

[0021] Figure 4 is the Figure 2 enlarged view of A in the present utility model;

[0022] Figure 5 is the Figure 2 enlarged view of B in the present utility model.

[0023] In the figure: mounting bracket 1, first L-shaped clamping part 2, vertical section A201, horizontal section A202, second L-shaped clamping part 3, vertical section B301, horizontal section B302, locking mechanism 4, connecting section A401, connecting section B402, hanging bracket 5, hanging hole 501, first shaft body 6, connecting ring A7, connecting ring B8, second shaft body 9, locking block 10, connecting ring C11, connecting ring D12, locking groove 13, positioning screw A14, positioning screw B15, compression spring 16, limiting ring 17, limiting part 18, handle A19, handle B20, extension ring A21, extension ring B22, arc-shaped groove 23, hook 24, flexible sleeve 25. Detailed implementation mode

[0024] In order to further elaborate the technical solution of the present invention, the present invention will be further described below in conjunction with the drawings and embodiments.

[0025] As Figures 1-5 shown, the present invention provides a lifting tooling for circular workpieces, including a mounting bracket 1, a first L-shaped clamping part 2, a second L-shaped clamping part 3 and a locking mechanism 4; a hanging bracket 5 for connecting with the hook of a crane is arranged on the upper part of the mounting bracket 1; the first L-shaped clamping part 2 is arranged at one end of the mounting bracket 1 and is hinged to the mounting bracket 1, and the second L-shaped clamping part 3 is arranged at the other end of the mounting bracket 1 relative to the first L-shaped clamping part 2, and the two are integrally arranged or fixedly connected; the first L-shaped clamping part 2 includes a vertical section A201 and a horizontal section A202, the vertical section A201 and the horizontal section A202 are integrally arranged, the upper end of the vertical section A201 is hinged to one end of the mounting bracket 1 through a first shaft body 6, and the horizontal section A202 is connected to the lower end of the vertical section A201 for clamping circular workpieces; the second L-shaped clamping part 3 includes a vertical section B301 and a horizontal section B302, the vertical section B301 and the horizontal section B302 are integrally arranged, the upper end of the vertical section B301 is fixedly connected to the mounting bracket 1, and the horizontal section B302 is connected to the lower end of the vertical section B301 for clamping circular workpieces; a locking mechanism 4 is connected between the upper end of the vertical section A201 and the hanging bracket 5, and the locking mechanism 4 is used to limit the rotation of the first L-shaped clamping part 2 so that the first L-shaped clamping part 2 maintains the clamping state.

[0026] Furthermore, at least one connecting ring A7 is fixedly arranged at the upper end of the vertical section A201, and at least one connecting ring B8 is fixedly arranged at the end of the mounting bracket 1 connected to the vertical section A201, and the connecting ring A7 and the connecting ring B8 are connected to the first shaft body 6.

[0027] Specifically, the first shaft body 6 is a threaded shaft, and the connecting ring A 7 and the connecting ring B 8 are constructed with internal threads that can cooperate with the first shaft body 6. While the first shaft body 6 can rotate relative to the connecting ring A 7 and the connecting ring B 8, there is also a certain frictional resistance between the first shaft body 6 and the other two, making the overall rotation process of the first L-shaped clamping portion 2 safer and more controllable. It will not rotate under non-human force, avoiding accidents during the loading and unloading process, causing harm to the staff or damage to the site facilities.

[0028] Further, the locking mechanism 4 includes a connecting section A 401, a connecting section B 402, a second shaft body 9, and a locking block 10. One end of the connecting section A 401 is fixedly connected to the connecting ring A 7, and a connecting ring C 11 is fixedly provided at the other end of the connecting section A 401. A connecting ring D 12 is fixedly provided at one end of the connecting section B 402. The locking block 10 is provided on the hanging bracket 5. A locking groove 13 that can cooperate with the locking block 10 is formed at the other end of the connecting section B 402. Both the connecting ring C 11 and the connecting ring D 12 are connected to the second shaft body 9.

[0029] Specifically, the connecting ring C 11, the connecting section A 401, the connecting ring A 7, and the vertical section A 201 are integrally provided. Therefore, when the vertical section A 201 rotates, the connecting section A 401 will also rotate accordingly, and the connecting section B 402 will move left or right, making the locking groove 13 approach or separate from the locking block 10. When the locking groove 13 and the locking block 10 approach and are in close contact, this is the self-locking state. In addition, in this embodiment, the second shaft body 9 is also selected as a threaded shaft. While the second shaft body 9 can rotate relative to the connecting ring C 11 and the connecting ring D 12, there is also a certain frictional resistance between the first shaft body 6 and the other two, making the overall rotation process of the connecting section B 402 safer and more controllable, avoiding accidents during the loading and unloading process.

[0030] Further, the vertical section A 201 is threadedly connected with a positioning screw A 14, and the vertical section B 301 is threadedly connected with a positioning screw B 15. Compression springs 16 are provided on the inner sides of the vertical section A 201 and the vertical section B 301. The two compression springs 16 are respectively sleeved outside the positioning screw A 14 and the positioning screw B 15. Pad bodies 1601 are provided at the opposite ends of the two compression springs 16, and the other ends are fixedly connected to the vertical section A 201 and the vertical section B 301 respectively.

[0031] Specifically, the positioning screws A14 and B15 can position the circular workpiece. Circular workpieces with different specifications and sizes have different placement centers or centers of gravity. The distance between the positioning screws A14 and B15 can be adjusted in advance according to circular workpieces of different specifications and sizes. By adjusting the placement position of the circular workpiece, it can be placed close to the center or at a suitable center of gravity position, making the transportation process more stable. The compression spring 16 can, without affecting the positioning of the circular workpiece, play a good role in squeezing and fixing the circular workpiece during transportation. The gasket 1601 is made of rubber or silica gel, which can prevent the compression spring 16 from scratching the surface of the circular workpiece and also prevent the positioning screw B15 from directly contacting the workpiece, avoiding scratches on the surface of the circular workpiece.

[0032] Further, a limit ring 17 is also provided on the locking block 10. The limit ring 17 is threadedly connected with a limiting member 18, and the limiting member 18 is used to block the upward flipping of the connecting section B402.

[0033] Specifically, the limiting member 18 is a bolt or a pin. After adjustment, the limiting member 18 can extend out of the left end of the upper surface of the locking block 10 to prevent the accidental upward flipping of the connecting section B402 and the situation where the locking block 10 completely disengages from the locking groove 13 under non-controlled conditions.

[0034] Further, a handle A19 is provided at one end of the positioning screw A14 located outside the vertical section A201, and a handle B20 is provided on the connecting section B402. The handles A19 and B20 can facilitate the staff to rotate the vertical section A and the connecting section B. It should be noted that the handle A19 is connected to the positioning screw A14, which is a better choice under the condition of retaining the positioning function. When the positioning screw A14 is not needed, the handle A19 can also be set at any position on the outside of the vertical section A201.

[0035] Further, an extension ring A21 corresponding to the positioning screw A14 is provided on the vertical section A201, and an extension ring B22 corresponding to the positioning screw B15 is provided on the vertical section B301. Both the extension ring A21 and the extension ring B22 have internal threads. The setting of the extension ring B22 can play a certain guiding role in the entry and exit of the positioning screws A14 and B15. At the same time, the positioning screws A14 and B15 are relatively long, and the extension ring B22 can also protect them, avoiding the breakage of the positioning screws A14 and B15 and improving their service life.

[0036] Further, an arc-shaped groove 23 is formed at one end of the transverse section A202 and the transverse section B302 that face each other. The arc-shaped groove 23 is provided according to the shape of the circular workpiece. While reducing the overall weight of the device, it enables the first L-shaped clamping portion 2 and the second L-shaped clamping portion 3 to complete the loading or unloading of the circular workpiece from top to bottom or from bottom to top with a relatively small opening and closing degree.

[0037] Further, a hook 24 is provided on the outer side of the second L-shaped clamping portion 3. The hook 24 is used for hanging a counterweight. During transportation, the position of the center of gravity may deviate, causing the overall shaking or jitter of the device and the workpiece during transportation. The counterweight can play a role in assisting in adjusting the center of gravity and improving the stability during transportation.

[0038] Further, flexible sleeves 25 are sleeved on one end of the transverse section A202 and the transverse section B302 that face each other. The flexible sleeves 25 are made of rubber or silica gel. The setting of the flexible sleeves 25 can prevent scratches on the circular workpiece during loading, unloading, or transportation.

[0039] Usage method of the present utility model:

[0040] Method 1: When the staff places the circular workpiece on the transverse section A202 from the side according to the actual situation (such as limited space, etc.), adjust the limiting member 18 to extend from the left side of the upper surface of the locking block 10 to ensure that the limiting member 18 can block the uncontrolled upward flipping of the connecting section B402. According to the size of the workpiece, adjust the inward entering length of the positioning screw A14 and the positioning screw B15 to perform preliminary positioning of the workpiece. After placing the workpiece, manually assist in completing the auxiliary positioning. When the workpiece is large, the extrusion force of the compression spring 16 itself is sufficient to fix the workpiece. When the workpiece is small, the positioning screw A14 and the positioning screw B15 can be adjusted inward to assist in fixing. After completing the positioning, lift and transport, and choose whether to add a counterweight according to the actual situation. The crane transports. Under the action of gravity, the locking mechanism 4 is self-locked to complete the transportation and unloading. The front, rear, left, or right side unloading or left and right opening unloading can be adopted according to the on-site environment.

[0041] Method 2: When the staff selects the opening and closing type to place the circular workpiece on the horizontal section A202 according to the actual situation (such as the workpiece being placed off the ground, etc.), adjust the position-limiting member 18 to a state where it does not protrude from the upper surface of the locking block 10. The connecting section B402 can be adjusted to turn upwards by the handle B20. By pulling the handle A19, the opening and closing degree of the first L-shaped clamping part 2 and the second L-shaped clamping part 3 is enlarged, and they move downwards from both sides of the workpiece. Adjust the horizontal section A202 and the horizontal section B302 to reset, so that the upper parts of both can fit the bottom of the workpiece. Adjust the connecting section B402 to reset, and the locking block 10 enters the locking groove 13. Adjust the position-limiting member 18 to protrude from the left side of the upper surface of the locking block 10 to ensure that the position-limiting member 18 can block the uncontrolled upward flipping of the connecting section B402. According to the size of the workpiece, adjust the positioning screw A14 and the positioning screw B15 to enter inward for a certain length to perform preliminary positioning of the workpiece. After the workpiece is placed, manual assistance is used to complete the auxiliary positioning. When the workpiece is large, the extrusion force of the compression spring 16 itself is sufficient to fix the workpiece. When the workpiece is small, the positioning screw A14 and the positioning screw B15 can be adjusted inward to assist in fixing. After positioning, it is hoisted and transported. According to the actual situation, it is selected whether to add a counterweight, and the crane is used for transportation. Under the action of gravity, the locking mechanism 4 is self-locked and at the same time the lateral clamping force on the workpiece is increased. After transportation, depending on the on-site environment, unloading can be carried out from the front and rear sides or by left and right opening and closing.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

[0043] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hoisting tool for a circular workpiece, characterized in that: It comprises a mounting frame (1), a first L-shaped clamping portion (2), a second L-shaped clamping portion (3) and a locking mechanism (4); The upper part of the mounting frame (1) is provided with a hanger (5) for connecting to a hook of a crane; The first L-shaped clamping portion (2) is arranged at one end of the mounting frame (1), and the second L-shaped clamping portion (3) is arranged at the other end of the mounting frame (1) relative to the first L-shaped clamping portion (2); The first L-shaped clamping portion (2) comprises a vertical section A (201) and a transverse section A (202), the upper end of the vertical section A (201) being hinged to one end of the mounting frame (1) via a first shaft (6), and the transverse section A (202) being connected to the lower end of the vertical section A (201) for clamping a circular workpiece; The second L-shaped clamping portion (3) comprises a vertical section B (301) and a transverse section B (302), the upper end of the vertical section B (301) is fixedly connected to the mounting frame (1), and the transverse section B (302) is connected to the lower end of the vertical section B (301) for clamping a circular workpiece; A locking mechanism (4) is connected between the upper end of the vertical section A (201) and the hanger (5), and the locking mechanism (4) is used to limit the rotation of the first L-shaped clamping portion (2) so that the first L-shaped clamping portion (2) is maintained in a clamped state.

2. A lifting tool for a circular workpiece according to claim 1, characterized in that: At least one connecting ring A (7) is fixedly provided at the upper end of the vertical section A (201), and at least one connecting ring B (8) is fixedly provided at one end of the mounting frame (1) connected to the vertical section A (201), and the connecting ring A (7) and the connecting ring B (8) are connected to the first shaft (6).

3. A lifting tool for a circular workpiece according to claim 2, characterized in that: The locking mechanism (4) comprises a connecting section A (401), a connecting section B (402), a second shaft (9) and a locking block (10); one end of the connecting section A (401) is fixedly connected to a connecting ring A (7); the other end of the connecting section A (401) is fixedly provided with a connecting ring C (11); one end of the connecting section B (402) is fixedly provided with a connecting ring D (12); a locking block (10) is provided on the hanger (5); the other end of the connecting section B (402) is provided with a locking groove (13) that can cooperate with the locking block (10); the connecting ring C (11) and the connecting ring D (12) are both connected to the second shaft (9).

4. The round workpiece lifting tool according to claim 3, characterized in that: The vertical section A (201) is threadedly connected to a positioning screw A (14), and the vertical section B (301) is threadedly connected to a positioning screw B (15). The inner sides of the vertical section A (201) and the vertical section B (301) are both provided with a clamping spring (16), and the two clamping springs (16) are respectively sleeved on the outer sides of the positioning screw A (14) and the positioning screw B (15). A pad (1601) is provided on the opposite ends of the two clamping springs (16), and the other ends are respectively fixedly connected to the vertical section A (201) and the vertical section B (301).

5. The round workpiece lifting tool according to claim 3, characterized in that: A limiting ring (17) is also provided on the locking block (10), and the limiting ring (17) is connected to a limiting member (18), and the limiting member (18) is used to prevent the connection section B (402) from turning upward.

6. The round workpiece lifting tool according to claim 4, characterized in that: A handle A (19) is provided at one end of the positioning screw A (14) located outside the vertical section A (201), and a handle B (20) is provided on the connecting section B (402).

7. The round workpiece lifting tool according to claim 4, characterized in that: An extension ring A (21) is provided on the vertical section A (201) corresponding to the positioning screw A (14), and an extension ring B (22) is provided on the vertical section B (301) corresponding to the positioning screw B (15).

8. The round workpiece lifting tool according to claim 3, characterized in that: The hanger (5) is a tripod, the lower end of which is connected to the upper part of the mounting frame (1), the upper end of which is provided with a hanging hole (501) for connecting to a hook of a crane, and the locking block (10) is arranged on an inclined frame on one side of the tripod close to the connecting section B (402).

9. The round workpiece lifting tool according to claim 3, characterized in that: The first shaft (6) and the second shaft (9) are both threaded shafts; an arc groove (23) is formed at the opposite ends of the transverse section A (202) and the transverse section B (302); a hook (24) is provided on the outward side of the second L-shaped clamping portion (3), and the hook (24) is used to hang a counterweight.

10. The round workpiece lifting tool according to claim 3, characterized in that: The opposite ends of the transverse section A (202) and the transverse section B (302) are both sleeved with flexible sleeves (25).

Images