Diameter-variable lifting appliance for precast concrete component

Abstract

The utility model discloses a precast concrete component variable-diameter lifting appliance which comprises a shell, a main shaft, a main gear and an auxiliary gear, the main shaft is pre-buried in a pre-buried steel pipe sleeve of concrete and installed in the shell in a penetrating mode, and the main gear is arranged on the main shaft in a sleeving mode; the shell wraps the main gear, and an auxiliary gear meshed with the main gear is arranged in the shell. The main gear is provided with an adjusting groove used for slidably installing an adjusting shaft, and the adjusting shaft is connected with a reducing block. A rocker is fixedly mounted at the axis of the pinion; the adjustable variable-diameter lifting appliance is formed by the variable-diameter block, the adjusting shaft and the adjusting groove, meanwhile, the main gear and the auxiliary gear which are meshed with each other are arranged, rotation is controlled through the rocker, variable-diameter adjustment is completed, connection and installation of the lifting appliance and the pre-embedded steel sleeve can be easily completed, and through the adjustable diameter design of the lifting appliance, the lifting appliance is convenient to use. The lifting appliance can adapt to steel sleeves and concrete prefabricated parts with different inner diameters, has good durability and is not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hoist technical field, especially a variable diameter hoist for prefabricated concrete components. BACKGROUND

[0002] With the wide application of prefabricated concrete components in the municipal field, their high quality, rapid construction and environmental protection characteristics gradually emerge. Prefabricated pipe jacking, prefabricated comprehensive pipe gallery and prefabricated shield pipe piece have also been used on a large scale in municipal infrastructure construction. Large infrastructure prefabricated components are favored for their high strength, high universality, construction convenience and excellent appearance quality; however, these large components also bring challenges, such as large volume and weight, and the overturning problem that may be encountered during production and transportation.

[0003] However, traditionally, large prefabricated components usually adopt embedded lifting rings or lifting sleeves and are lifted by hooks. But this method requires secondary cutting of the lifting ring, and the lifting ring cannot rotate freely, which limits the overturning of the component. Another method is to embed a steel sleeve and use a special hoist for lifting. But this hoist relies on the friction with the inner wall of the steel sleeve for fixation, so it is required to closely match the diameter of the hoist with the outer diameter of the steel sleeve to generate sufficient friction. This results in difficulty in inserting and pulling out the hoist due to the too small gap with the inner diameter of the steel sleeve during installation and disassembly, which requires the use of a hammer to knock, not only time-consuming and laborious, but also easy to damage the hoist.

[0004] Therefore, a variable diameter hoist for prefabricated concrete components is proposed to solve the above-mentioned problems of difficulty in installing or disassembling the hoist. SUMMARY

[0005] In order to solve the above-mentioned problems existing in the prior art, the utility model provides a variable diameter hoist for prefabricated concrete components.

[0006] The technical scheme of the utility model is as follows:

[0007] A variable diameter hoist for prefabricated concrete components, comprising a shell, a main shaft, a main gear and a secondary gear, the main shaft is embedded into a prefabricated steel pipe sleeve of concrete and penetrates through the inside of the shell, and the main gear is sleeved on the main shaft; the shell wraps the main gear, and the shell is provided with a secondary gear meshing with the main gear; an adjusting groove is provided on the main gear for slidingly installing an adjusting shaft, and the adjusting shaft is connected to install a variable diameter block; a rocker is fixedly installed at the shaft center of the secondary gear.

[0008] Preferably, a ball bearing is arranged at the connection between the main shaft and the shell.

[0009] Preferably, a reserved hole is arranged at the top of the shell for threading a shackle, and the shackle is fixed between the shell by high-strength bolts.

[0010] Preferably, the main shaft is externally provided with a notch, and the adjusting shaft is fixedly connected with the variable-diameter block and extends into the notch and slides up and down in the notch.

[0011] The utility model has the advantages that: the utility model discloses a variable-diameter lifting appliance which can be adjusted through a variable-diameter block, an adjusting shaft and an adjusting groove structure, and a main gear and a secondary gear are arranged to mesh with each other, and the main gear and the secondary gear are controlled to rotate through a rocker, so that variable-diameter adjustment is completed, and the connection and installation of the lifting appliance and a pre-buried steel sleeve can be easily completed without the aid of strong external force or knocking, which not only saves manpower resources, but also significantly improves the efficiency of installation and disassembly; meanwhile, the structure also brings higher safety, because no large force needs to be applied or knocking needs to be performed during installation and disassembly, so that accidental injuries during operation are effectively avoided; and the structure also allows overturning according to the self-weight of the concrete prefabricated component, reduces the dependence on mechanical equipment, and further enhances the safety of operation. Through the adjustable diameter design, the lifting appliance can adapt to steel sleeves and concrete prefabricated components with different inner diameters, has good durability and is not easy to be damaged, and therefore has high economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective view of the overall structure of the utility model;

[0013] Figure 2 It is a front view of the overall structure of the utility model;

[0014] Figure 3 It is a side view of the overall structure of the utility model;

[0015] Figure 4 It is a front view of the internal structure of the utility model;

[0016] Figure 5 It is a back view of the internal structure of the utility model.

[0017] In the drawings, the reference signs are represented as:

[0018] 1, main gear; 2, adjusting groove; 3, secondary gear; 4, rocker; 5, adjusting shaft; 6, variable-diameter block; 7, main shaft; 8, ball bearing; 9, shell; 10, shackle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] See Figures 1 to 5 A concrete prefabricated component variable diameter lifting appliance, the main shaft 7 is embedded in the embedded steel pipe sleeve of the concrete and penetrates the inside of the shell 9, the main shaft 7 is the fixed shaft of the overall lifting appliance, and plays the role of connecting the main gear 1 and the variable diameter block 6, and the main gear 1 is sleeved on the main shaft 1, the main gear 1 is processed by carbon steel, the main gear 1 is rotated as the diameter adjusting gear, and the shell 9 wraps the main gear 1, and the shell 9 is provided with a secondary gear 3 engaged with the main gear 1, the secondary gear 3 is processed by carbon steel, and is used as the force transmission device during diameter adjustment;

[0021] The main gear 1 is grooved in the form of laser cutting to form an adjusting groove 2, the adjusting groove 2 is used for slidingly installing an adjusting shaft 5, the adjusting groove 2 is formed by laser cutting and is a through groove for outward expansion rotation, and is used as the channel of the adjusting shaft 5 during diameter adjustment, the adjusting shaft 5 is a cylindrical carbon steel and can slide in the adjusting groove 2, the adjusting shaft 5 is connected and installed with the variable diameter block 6 at the outer end, in the embodiment, the variable diameter block 6 is made of steel and realizes diameter adjustment through the expansion and contraction of the six variable diameter blocks;

[0022] The secondary gear 3 is fixedly installed at the shaft center and is processed by Q235, the secondary gear 3 is rotated by rotating the rocker 4, plays the role of force transmission, the main shaft 7 is provided with a ball bearing 8 at the connecting position with the shell 9, so that the main shaft 7 can rotate freely, the shell 9 is provided with a reserved hole at the top for penetrating a shackle 10, the shackle 10 and the shell 9 are fixed by high-strength bolts, and are used for connecting the steel wire rope and the lifting appliance during lifting, the main shaft 7 is provided with a notch, and the adjusting shaft 5 and the variable diameter block 6 are fixedly connected and then inserted into the notch and slide up and down in the notch.

[0023] The working principle of the utility model is as follows:

[0024] In the utility model, first, the steel pipe sleeve is embedded in the concrete prefabricated component, then the main shaft 7 is put into the embedded steel pipe sleeve, at this time, the rocker 4 is rotated to drive the secondary gear 3 to rotate, the secondary gear 3 drives the main gear 1 to rotate through the engaged gear teeth, after the main gear 1 rotates, the adjusting groove 2 on the main gear 1 rotates, and then drives the adjusting shaft 5 to longitudinally slide in the adjusting groove 2, next, the variable diameter block 6 slides outward along the longitudinal groove reserved in the main shaft 7 following the adjusting shaft 5, after the variable diameter block 6 closely fits the inner wall of the embedded steel pipe sleeve, the rotation of the rocker 4 is stopped and the rocker 4 is fixed, then the steel wire rope is penetrated through the shackle 10, and the high-strength bolts of the shackle 10 are fastened, finally, the lifting appliance is pulled up to complete the lifting of the concrete prefabricated component, if the component needs to be overturned, the component only needs to be slightly pushed, the lifting appliance can be overturned under the action of the ball bearing 8, when the lifting is completed, the rocker 4 is reversely rotated again, the variable diameter block 6 is reversely contracted, and the lifting appliance as a whole can be taken out of the embedded steel pipe sleeve.

[0025] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made according to the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A variable diameter hanger for precast concrete components, comprising a housing (9), a main shaft (7), a main gear (1) and a secondary gear (3), characterized in that: The main shaft (7) is pre-buried in a pre-buried steel pipe sleeve in concrete and is installed through the interior of the housing (9), and the main gear (1) is sleeved on the main shaft (7); the housing (9) wraps the main gear (1), and a sub-gear (3) meshing with the main gear (1) is provided in the housing (9); an adjustment groove (2) is provided on the main gear (1) for slidingly installing an adjustment shaft (5), and the adjustment shaft (5) is connected to the installation of a reducing block (6); a rocker (4) is fixedly installed at the axis of the sub-gear (3).

2. The variable diameter hanger for precast concrete components according to claim 1, characterized in that: A ball bearing (8) is provided at the connection between the main shaft (7) and the housing (9).

3. The variable diameter hanger for precast concrete components according to claim 1, characterized in that: The top of the shell (9) is provided with a reserved hole for passing a shackle (10), and the shackle (10) and the shell (9) are fixed by high-strength bolts.

4. The variable diameter hanger for precast concrete components according to claim 1, characterized in that: A notch is provided on the outer extension of the main shaft (7); the adjusting shaft (5) is fixedly connected to the diameter-changing block (6) and then extends into the notch and slides up and down in the notch.

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