CN210340075U

CN210340075U - Lifting appliance

Info

Publication number: CN210340075U
Application number: CN201920715744.XU
Authority: CN
Inventors: 王元鑫; 杨鑫田
Original assignee: Suzhou Qianxu Precision Manufacturing Co Ltd
Current assignee: Suzhou Qianxu Precision Manufacturing Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-04-17
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a lifting appliance, include: a base including a third shaft hole penetrating through upper and lower surfaces of the base; a boom configured to be connectable to the base; a lifting bolt comprising a head portion and a shank portion having an external thread, the shank portion being configured to pass through the third shaft aperture; a second washer having a third threaded bore with external threads adapted to the shank portion; and an end face groove is formed in the surface of the second gasket, which is in contact with the to-be-lifted piece. The utility model provides a hoist has advantages such as easy operation, hoist and mount efficiency improve, firm in connection is reliable, and this hoist is made simply moreover, easy maintenance, and application scope is wide, and is compatible strong.

Description

Lifting appliance

Technical Field

The present invention relates to a lifting sling, and more particularly, to a lifting sling for connecting a lifting object to a rope, a crane hook, or the like when lifting the lifting object.

Background

As the number of prefabricated buildings increases, the number of cases where a concrete structure as a weight is lifted by a crane and the structure is manufactured is increasing. For example, a prefabricated concrete structure is placed at a desired position and fastened to the structure by using a crane. In this case, in order to transport the concrete structure, it is necessary to temporarily fasten the crane and the concrete structure, and therefore, after the threaded sleeve is embedded in the concrete structure and a part of the threaded sleeve inserted therein is exposed to the outside of the concrete structure, the metal wire or chain of the crane is connected to the ring positioned on the eye bolt in a state where the eye bolt having the ring is connected, and the concrete structure is transported.

In the prior art, the lifting appliance generally adopts two modes: fixed and rotatable. The fixed lifting appliance can rotate or turn over a lifted object in the using process so as to facilitate the installation of the lifting appliance, and the lifting process is too troublesome. The U-shaped suspender of the rotatable suspender is usually cast, and the cast U-shaped suspender has the process defects of air holes, sand sticking, sand inclusion, sand holes, sand expansion, cold shut, insufficient pouring, shrinkage porosity, shrinkage cavity, meat deficiency, sarcoma and the like, and can cause the safety hidden trouble in the using process of the suspender. In addition, the two lifting appliances can only be matched with lifting bolts with fixed specifications, and customers cannot quickly switch when lifting various types of products.

Disclosure of Invention

The invention aims to provide a lifting appliance which can be adapted to lifting bolts of various specifications and can be quickly replaced.

In order to solve the above technical problem, an embodiment of the present invention discloses a hanger, including: a base including a third shaft hole penetrating through upper and lower surfaces of the base; a boom configured to be connectable to the base; a lifting bolt comprising a head portion and a shank portion having an external thread, the shank portion being configured to pass through the third shaft aperture; a second washer having a third threaded bore with external threads adapted to the shank portion; the hanger further optionally comprises a sleeve having an outer diameter configured to fit the inner diameter of the third shaft bore; the sleeve has a fourth shaft hole having an inner diameter configured to fit the outer diameter of the screw portion.

As a modification of an embodiment of the present invention, an outer diameter of the sleeve is smaller than an inner diameter of the third shaft hole.

As a modification of an embodiment of the present invention, the inner diameter of the fourth shaft hole is larger than the outer diameter of the screw portion.

As a modification of the embodiment of the present invention, the bore inner wall of the third shaft hole is configured as a smooth surface, and the bore inner wall of the fourth shaft hole is configured as a smooth surface.

As a refinement of one embodiment of the invention, the length of the sleeve is no greater than the distance between the upper and lower surfaces of the base.

As a refinement of one embodiment of the invention, the spacing distance defined between the second washer and the head is greater than the thickness of the base.

As an improvement of one embodiment of the present invention, the lifting appliance further includes a first gasket, and the first gasket is configured to be sleeved on the lifting bolt and clamped between the head and the upper surface of the base; the second spacer defines a separation distance with the head that is greater than a sum of thicknesses of the base and the first spacer.

As a refinement of one embodiment of the invention, the boom is configured to be rotatable about a first axis relative to the base, and the lifting bolt is configured to be rotatable about a second axis relative to the base.

As a modification of a specific embodiment of the present invention, the base includes a first threaded hole, and the boom includes a first shaft hole; the lifting appliance further comprises a first bolt, and a screw rod of the first bolt can penetrate through the first shaft hole and then is tightly connected with the first threaded hole.

As an improvement of a specific embodiment of the invention, the hoisting bolt sequentially comprises a head part, a polished rod part and a screw rod part, and the length of the polished rod part is not less than the thickness of the base.

The invention provides a lifting appliance which is more stable in contact with a member to be lifted and higher in safety.

In order to solve the above technical problem, an embodiment of the present invention discloses a hanger, including: a base including a third shaft hole penetrating through upper and lower surfaces of the base; a boom configured to be connectable to the base; a lifting bolt comprising a head portion and a shank portion having an external thread, the shank portion being configured to pass through the third shaft aperture; a second washer having a third threaded bore with external threads adapted to the shank portion; and an end face groove is formed in the surface of the second gasket, which is in contact with the to-be-lifted piece.

As a modification of an embodiment of the present invention, the depth of the end surface groove is not less than 2 mm.

As a modification of a specific embodiment of the present invention, the end surface groove is configured as a circular groove.

As a modification of an embodiment of the present invention, the center of the end surface groove is on the axis of the third threaded hole.

As a modification of a specific embodiment of the present invention, the diameter of the end surface groove is not less than 40 mm.

The lifting appliance provided by the invention has the advantages of simple operation, improved lifting efficiency, firm and reliable connection and the like, and is simple to manufacture, convenient to maintain, wide in application range and strong in compatibility.

Drawings

Fig. 1 is an exploded view of a spreader in accordance with an embodiment of the present invention.

Fig. 2 is a front view of a spreader in accordance with a particular embodiment of the present invention.

Fig. 3 is a side view of a spreader in accordance with a particular embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along a-a in fig. 2.

Fig. 5 is a sectional view taken along B-B in fig. 3.

Fig. 6 is an enlarged view of a portion C in fig. 5.

FIG. 7 is a schematic view of a second gasket in accordance with an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It is to be understood that the terms "first," "second," and the like in the description of the embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the embodiments of the present invention, unless otherwise explicitly stated or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as a fixed connection, a movable connection, a detachable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In particular embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween.

In particular embodiments of the present invention, the term "plurality" means two or more unless explicitly stated or limited otherwise.

Referring to fig. 1 to 5, an embodiment of the present invention discloses a spreader 1, which includes a hanger rod 2, a lifting bolt 32, and a base 4. The boom 2 and the hoist bolt 32 are respectively connected to the base 4, the boom 2 is configured to be rotatable about a first axis X, and the hoist bolt 32 is configured to be rotatable about a second axis Y, wherein the first axis X is orthogonal to the second axis Y.

In the present embodiment, the hanger rod 2 is forged from high quality carbon structural steel to have an outer shape, a machined outer shape, and a hole, and includes a ring portion 20, a first arm portion 22, and a second arm portion 24. In the present embodiment, the ring portion 20 is configured in a semicircular ring shape, and the first arm portion 22 and the second arm portion 24 extend downward from both free ends of the ring portion 20 in parallel with each other, so that the entire boom 2 is substantially U-shaped with an opening downward. In other embodiments, the boom 2 may also be configured in other shapes as long as it is capable of providing an attachment point to a crane. A first shaft hole 222 is provided at a lower end of the first arm portion 22, a second shaft hole 224 is provided at a lower end of the second arm portion 24, and the first shaft hole 222 and the second shaft hole 224 are arranged to face each other such that an axis of the first shaft hole 222 and an axis of the second shaft hole 224 are collinear. In this embodiment, the inner walls of the first shaft hole 222 and the second shaft hole 224 are substantially smooth.

The base 4 is configured in a cylindrical shape having substantially flat upper and lower surfaces. The base 4 includes a third axial hole 42. The third shaft hole 42 penetrates the upper surface and the lower surface of the base 4, and both the axis of the third shaft hole 42 and the axis of the base 4 are collinear with the second axis Y. In the present embodiment, the inner wall of the third shaft hole 42 is substantially smooth. The base 4 further includes a first screw hole 44 and a second screw hole provided on the circumferential surface thereof. The first threaded hole 44 and the second threaded hole are oppositely disposed such that the axis of the first threaded hole 44 and the axis of the second threaded hole are both collinear with the first axis X. In the present embodiment, the first and second screw holes 44 and 224 are configured as through holes having internal threads penetrating the circumferential surface of the base 4, and the diameter of the base 4 is slightly smaller than the distance between the first and second shaft holes 222 and 224.

In the present embodiment, the boom 2 is connected to the base 4 by a first bolt 34 and a second bolt 36. Specifically, during assembly, the base 4 is positioned between the first arm 22 and the second arm 24 such that the first shaft hole 222 is aligned with the hoist bolt hole 44 and the second shaft hole 224 is aligned with the first bolt hole 46. The screw of the first bolt 34 passes through the first shaft hole 222 into the first threaded hole 44 and is fastened thereto, and the screw of the second bolt 36 passes through the second shaft hole 242 into the second threaded hole and is fastened thereto. In this embodiment, the first shaft hole 222 and the second shaft hole 224 are provided with rounded corners at the hole openings, and accordingly, the joints between the bolt heads and the bolts of the first bolt 34 and the second bolt 34 are provided with rounded corners, so that the shearing force between the lifting bolt 34 and the first shaft hole 222 and between the lifting bolt 36 and the second shaft hole 224 when the boom 2 rotates around the first axis X can be effectively reduced, the service life of the spreader is prolonged, and the safety factor is improved.

In other embodiments, the boom 2 may be fixedly attached to the base 4, as long as sufficient space is available for mounting the hoist bolts 32.

The spreader 1 of this embodiment further comprises a second spacer 64. The hoist bolt 32 is connected to the base 4 by the second washer 64. Specifically, the hoisting bolt 32 sequentially comprises a head 322, a polished rod 324 and a threaded rod 326 with external threads, the polished rod 324 and the threaded rod 326 have the same outer diameter, and the length of the polished rod 324 is not less than the thickness of the base 4 (i.e. the distance between the upper surface and the lower surface of the base 4). The screw portion 326 is configured for connection with a threaded sleeve embedded in a member to be hoisted. The spreader 1 may optionally further comprise a sleeve 5. The sleeve 5 is configured in a circular tube shape having a length not greater than the thickness of the base 4, and has a fourth shaft hole 52. The inner bore wall of the fourth shaft bore 52 is substantially smooth. The sleeve 5 has an outer diameter configured to fit the inner diameter of the third shaft hole 42, and the fourth shaft hole 52 has an inner diameter configured to fit the outer diameter of the polished rod portion 324 of the hoist bolt. In this embodiment, the outer diameter of the sleeve 5 is slightly smaller than the inner diameter of the third shaft hole 42, and the inner diameter of the fourth shaft hole 52 is slightly larger than the outer diameter of the light rod portion 324. The second washer 64 has a third threaded hole 642, and the third threaded hole 642 has an internal thread adapted to the external thread of the screw portion 326. During assembly, the sleeve 5 is sleeved on the lifting bolt 32, and then the lifting bolt 32 and the sleeve 5 are inserted through the third shaft hole 42 of the base 4, so that the head 322 of the lifting bolt 32 is positioned on the upper surface of the base 4, and the screw portion 326 of the lifting bolt 32 at least partially protrudes from the lower surface of the base 4. The second gasket 64 is then fitted over the screw portion 326 and tightened. In the above assembling process, whether the sleeve 5 is needed or not can be selected according to actual conditions. In the present embodiment, the distance between the tightened second spacer 64 and the head 322 is slightly larger than the thickness of the base 4, so that the lifting bolt 32 can rotate freely around the second axis Y relative to the base 4 when the lifting bolt 32 is assembled to the base 4. In a more preferred embodiment, the spreader 1 further comprises a first spacer 62 having a fifth axle aperture. The first washer 62 is configured to fit over the first screw 32 between the head 322 and the sleeve 5. During assembly, the first threaded rod 32 is now inserted through the fifth axial hole in the first washer 62, and the first threaded rod 32 is then inserted through the fourth axial hole 52 in the sleeve 5. When the hoist bolt 32 is assembled to the base 4, the first washer 62 is sandwiched between the head 322 and the upper surface of the base 4, and the distance between the tightened second washer 64 and the head 322 is slightly greater than the sum of the thickness of the base 4 and the thickness of the first washer 64.

In the present embodiment, the hoisting bolt 32 of different specifications can be adapted only by changing the inner diameter of the sleeve 5 and the hole diameter of the third threaded hole 642 of the second washer 64 (if the first washer 62 is provided, the hole diameter of the fifth axial hole of the first washer 62 needs to be changed). Specifically, in the present embodiment, the inner diameter of the third shaft hole 42 is 20.5 mm, the maximum adaptable hoisting bolt 32 of the lifting appliance 1 has a specification of M20, and the bolt specification is downward compatible. In particular, when the lifting bolt 32 to which the spreader 1 is fitted has a specification of M20, the spreader 1 is not fitted with the sleeve 5. If the lifting appliance 1 needs to be adapted to the lifting bolt 32 with smaller specification, only the sleeve 5, the second gasket 64 and the first gasket 62 with corresponding specification need to be assembled. For example, if the specification of the hoisting bolt 32 to be adapted to the spreader 1 is M12, the sleeve 5 with the inner diameter of 12.5 mm of the fourth shaft hole 52 needs to be assembled.

When the lifting appliance 1 is connected with a member to be lifted, the lower surface of the second gasket 64 is tightly attached to the member to be lifted. There is typically raised debris on the face of the member to be lifted that contacts the second pad 64, which debris destabilizes the fastening of the spreader 1, resulting in a reduction in the safety of lifting, while increasing wear of the second pad 64 and reducing the life of the spreader 1. As a technical improvement, referring to fig. 6 and 7, in the present embodiment, the lower surface of the second gasket 64 is provided with an end surface groove 644. The end face groove 644 is configured as a groove recessed inward from the lower surface of the second gasket 64. Specifically, the end surface groove 644 is configured as a circular groove, further, the center of the end surface groove 644 is on the axis of the third threaded hole 642, the depth of the end surface groove 644 is not less than 2 mm, and the diameter is not less than 40 mm. Due to the structural design, in the use process of the lifting appliance 1, the contact area of the second gasket 64 and the member to be lifted is reduced, part of crushed sand and stones can be avoided in the assembling and screwing process, or the crushed sand and stones can be pressed to be thinner due to the fact that the smaller contact area can generate larger pressure, so that the contact between the second gasket 64 and the member to be lifted is more stable and reliable, and the lifting safety is enhanced.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A spreader, comprising:

a base including a third shaft hole penetrating through upper and lower surfaces of the base;

a boom configured to be connectable to the base;

a lifting bolt comprising a head portion and a shank portion having an external thread, the shank portion being configured to pass through the third shaft aperture;

a second washer having a third threaded bore with external threads adapted to the shank portion;

the lifting device is characterized in that an end face groove (644) is formed in the surface, in contact with a piece to be lifted, of the second gasket.

2. The spreader of claim 1, wherein the depth of the face groove is not less than 2 mm.

3. A spreader according to claim 1, wherein the end surface groove is configured as a circular groove.

4. A spreader according to claim 3, wherein the centre of the face groove is on the axis of the third threaded hole.

5. A spreader according to claim 1, wherein the diameter of the end surface groove is not less than 40 mm.

6. The spreader of claim 1, wherein the second pad is spaced from the head by a distance greater than the thickness of the base.

7. The spreader of claim 1, further comprising a first spacer configured to be sleeved over the hoist bolt and sandwiched between the head portion and the upper surface of the base; the second spacer defines a separation distance with the head that is greater than a sum of thicknesses of the base and the first spacer.

8. The spreader of claim 1, wherein the boom is configured to be rotatable relative to the base about a first axis, and the lifting bolt is configured to be rotatable relative to the base about a second axis.

9. The spreader of claim 8, wherein the base includes a first threaded aperture and the hanger bar includes a first axial aperture; the lifting appliance further comprises a first bolt, and a screw rod of the first bolt can penetrate through the first shaft hole and then is tightly connected with the first threaded hole.

10. The spreader of claim 1, wherein the lifting bolt comprises a head portion, a polished rod portion and a screw portion in sequence, and the length of the polished rod portion is not less than the thickness of the base.