CN215797975U

CN215797975U - Internal expansion type lifting appliance

Info

Publication number: CN215797975U
Application number: CN202121917034.9U
Authority: CN
Inventors: 吴志强; 彭毅中; 高绮文; 付正勇
Original assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Current assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-02-11
Anticipated expiration: 2031-08-17

Abstract

The utility model discloses an internal expansion type lifting appliance, which is used for lifting a workpiece and comprises: the support is provided with connecting holes penetrating through the top end and the bottom end of the support; the suspender is connected in the connecting hole in a relatively sliding way and is provided with a supporting part positioned below the support; the suspension arms surround the outer side of the supporting part and are used for clamping a workpiece together, each suspension arm is connected to the support in a relatively rotating manner, each suspension arm is abutted against the supporting part, and a point contact is formed between each suspension arm and the supporting part; the supporting part moves up and down under the driving of the suspension rod to push against the plurality of suspension arms, so that the plurality of suspension arms rotate inwards or outwards. Through setting up and forming the point contact between each davit and the supporting part, can prevent that the dead condition of card from appearing in supporting part and davit to ensure that the jib slides from top to bottom smoothly, further improve the security performance, and can simplify structure and processing technology.

Description

Internal expansion type lifting appliance

Technical Field

The utility model relates to the technical field of hanging devices, in particular to an internal expansion type lifting appliance.

Background

In the production process of automobiles, the part to be hoisted is hoisted to the target position by the hoisting equipment through the hoist, for example, when the bearing is hoisted, the hoist is connected to the hoisting equipment, then the clamping jaws of the hoist are clamped into the inner wall of the hoisting hole of the bearing, and the bearing is hoisted to the target position by the hoisting equipment through the hoist. The current hoist includes the supporting seat, relative sliding connection is in the jib on the supporting seat, articulate a plurality of davits on the supporting seat and be fixed in the backup pad of the bottom of jib, the bottom of davit is equipped with the jack catch with the inner wall block of hole for hoist, the concave recess that leans out for the jib that is equipped with of lateral wall of backup pad, the lateral wall sliding fit of recess and davit, it slides from top to bottom to drive the backup pad when the jib slides from top to bottom, make the davit contract inwards or outwards open, however, the backup pad is upwards or gliding in-process down, it easily takes place the card dead phenomenon with the davit, lead to the jib can't upwards or the lapse and influence hoist normal use and have the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide an internal expansion type lifting appliance which can ensure that a lifting rod slides up and down smoothly, has high safety performance and is simple in structure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

internal expanding hoist for lift by crane the work piece, include: the support is provided with connecting holes penetrating through the top end and the bottom end of the support; the suspension rod is connected in the connecting hole in a relatively sliding manner and is provided with a supporting part positioned below the support; a plurality of suspension arms surrounding the outer side of the supporting part and used for clamping the workpiece together, wherein each suspension arm is connected to the support in a relatively rotating manner, and each suspension arm is abutted against the supporting part and forms point contact with the supporting part; the supporting part moves up and down under the driving of the hanging rod to push the plurality of hanging arms, so that the plurality of hanging arms rotate inwards or outwards.

Further, the outer side wall of the supporting part is provided with a spherical surface, and the inner side wall of each suspension arm is abutted against the spherical surface to enable the two to form point contact.

Further, the supporting portion is cylindrical, and the spherical surface is formed by extending upwards from the top end of the outer peripheral wall of the supporting portion.

Furthermore, the inner side wall of the suspension arm is a plane, and the plane is abutted against the spherical surface to enable the plane and the spherical surface to form point contact.

Further, the inner side wall of the suspension arm is inclined outwards relative to the outer side wall of the support part.

Furthermore, the bottom surface of the support is provided with a plurality of connecting lugs which surround the outer side of the hanging rod in a downward protruding mode, a pin shaft is fixedly connected between every two adjacent connecting lugs, and the hanging arm is connected to the pin shaft in a relatively rotating mode.

Furthermore, the top surface of the support protrudes to form an extension part, the connecting hole extends upwards to the top surface of the extension part, and the top end of the suspender extends out of the extension part from the connecting hole.

Furthermore, the hanger rod is a round rod, the supporting portion is formed at the bottom end of the round rod and is integrally formed with the round rod, lifting holes used for being connected with lifting equipment are formed in the top end of the round rod, the lifting holes penetrate through the round rod along the radial direction of the round rod, and the number of the lifting arms is three.

The internal expansion type lifting appliance can prevent the supporting part and the lifting arm from being blocked by arranging each lifting arm to abut against the supporting part and forming point contact between the two, thereby ensuring the smooth up-and-down sliding of the lifting arm and further improving the safety performance, and the supporting part does not need to be provided with a groove which is in sliding fit with the lifting arm, thereby achieving the purposes of simplifying the structure and the processing technology.

Drawings

Fig. 1 is a schematic perspective view of an internal expanding spreader of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a partially enlarged view of a portion a of fig. 2.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 3, the present invention provides an internal expanding type lifting tool, which is used for lifting a workpiece, wherein the workpiece is a part having an inner hole, such as a bearing, a hub or a gear, and the like, when lifting the workpiece, the top end of the internal expanding type lifting tool is connected to a lifting device (not shown), the claw 31 at the bottom end of the internal expanding type lifting tool abuts against the inner wall of the inner hole to firmly clamp the workpiece, and the lifting device is a crane. The internal expanding hoist includes: the suspension device comprises a support 1, a suspension rod 2 and a plurality of suspension arms 3, wherein the suspension rod 2 and the plurality of suspension arms 3 are connected to the support 1.

As shown in fig. 1 and 2, the support 1 has a connecting hole 11 vertically penetrating through the top end and the bottom end of the support 1, a plurality of engaging lugs 12 downwardly protrude from the bottom surface of the support 1, the plurality of engaging lugs 12 surround the outer side of the suspension rod 2, a pin 13 is fixedly connected between every two adjacent engaging lugs 12, in this embodiment, each two adjacent engaging lugs 12 form a group of engaging lugs 12, and there are three groups of engaging lugs 12. The top surface of the support 1 protrudes to form a cylindrical extension part 14, the extension part 14 and the support 1 are integrally formed, in other embodiments, the extension part 14 is also split, the connecting hole 11 extends upwards to the top surface of the extension part 14 to increase the depth of the connecting hole 11, so as to achieve the purpose of improving the guidance of the connecting hole 11, and by arranging the extension part 14, an operator can hold the extension part 14 to move the support 1 upwards or downwards so as to take down or use the internal expansion type lifting appliance.

The suspension rod 2 is connected in the connecting hole 11 in a relatively sliding manner, and is provided with a supporting part 21 positioned below the support 1, the supporting part 21 is cylindrical and moves up and down under the driving of the suspension rod 2 to push against the plurality of suspension arms 3, and the top end of the suspension rod 2 extends out of the extending part 14 from the connecting hole 11. Specifically, the suspender 2 is a round bar, the supporting portion 21 is formed at the bottom end of the round bar and integrally formed with the round bar, a lifting hole 22 for connecting a lifting device is formed at the top end of the round bar, and the lifting hole 22 penetrates through the round bar along the radial direction of the round bar.

As shown in fig. 1 and 2, a plurality of suspension arms 3 surround the outside of the supporting portion 21 and are used for commonly clamping the workpiece, the suspension arms 3 have three jaws 31 for balancing the stress of the workpiece during the hoisting process, each suspension arm 3 is relatively rotatably connected to the support 1, the outer side wall of the bottom end of the suspension arm 3 protrudes outwards to form a jaw for clamping the workpiece, specifically, one suspension arm 3 is relatively rotatably connected to a pin 13, and each suspension arm 3 abuts against the supporting portion 21 and forms a point contact therebetween (as shown in fig. 3), i.e., a contact point is formed between each suspension arm 3 and the supporting portion 21. Because the suspension arm of the lifting appliance in the prior art is in sliding fit with the outer side wall of the suspension arm through the inclined groove, namely the groove is in surface contact with the outer side wall of the suspension arm, the clamping condition can occur once the matching surface between the groove and the suspension arm deviates from the normal working position in the surface contact mode, and the processing difficulty of the inclined groove is high, therefore, the internal expansion type lifting appliance can prevent the clamping condition of the support part 21 and the suspension arm 3 by arranging each suspension arm 3 to abut against the support part 21 and forming point contact between the two, thereby ensuring the smooth up-and-down sliding of the suspension arm 2, further improving the safety performance, and the support part 21 does not need to be provided with the groove in sliding fit with the suspension arm 3, thereby achieving the purpose of simplifying the structure and the processing technology. In order to simplify the structure, in the present embodiment, the outer sidewall of the support 21 has a spherical surface 211, the spherical surface 211 is formed by extending upward from the top end of the outer peripheral wall of the support 21, the inner sidewall of each suspension arm 3 abuts against the spherical surface 211 to form a point contact therebetween, specifically, the inner sidewall of the suspension arm 3 is a plane, the plane abuts against the spherical surface 211 to form a point contact therebetween, and the inner sidewall of the suspension arm 3 is inclined outward relative to the outer sidewall of the support 21 to form a point contact between the suspension arm 3 and the support 21.

When the suspension rod 2 slides upwards relative to the support 1, the support part 21 is driven to upwards push the plurality of suspension arms 3, the plurality of suspension arms 3 outwards rotate relative to the support 1 under the pushing action of the support part 21, and at the moment, the plurality of suspension arms 3 are opened to clamp the workpiece; when the suspension rod 2 slides downwards relative to the support 1, the support part 21 is driven to push the plurality of suspension arms 3 downwards, the plurality of suspension arms 3 rotate inwards relative to the support 1 under the pushing of the support part 21, and at the moment, the plurality of suspension arms 3 contract to release the workpiece.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims

1. Internal expanding hoist for lift by crane the work piece, its characterized in that includes:

the support is provided with connecting holes penetrating through the top end and the bottom end of the support;

the suspension rod is connected in the connecting hole in a relatively sliding manner and is provided with a supporting part positioned below the support;

a plurality of suspension arms surrounding the outer side of the supporting part and used for clamping the workpiece together, wherein each suspension arm is connected to the support in a relatively rotating manner, and each suspension arm is abutted against the supporting part and forms point contact with the supporting part;

the supporting part moves up and down under the driving of the hanging rod to push the plurality of hanging arms, so that the plurality of hanging arms rotate inwards or outwards.

2. An internal expanding spreader as claimed in claim 1, wherein the outer side wall of the support portion has a spherical surface, and the inner side wall of each arm abuts against the spherical surface to make point contact therebetween.

3. The internal expanding spreader according to claim 2, wherein the support portion is cylindrical, and the spherical surface is formed by extending upward from the top end of the outer peripheral wall of the support portion.

4. An internal expanding spreader as claimed in claim 2, wherein the inner side wall of the arm is a flat surface which abuts against the spherical surface to make point contact.

5. An internal expanding spreader as claimed in claim 1, wherein the inner side walls of the boom are inclined outwardly relative to the outer side walls of the support.

6. The internal expanding hanger as claimed in claim 1, wherein a plurality of engaging lugs are protruded downwardly from the bottom surface of the support to surround the outer side of the hanger rod, a pin is fixedly connected between every two adjacent engaging lugs, and a hanger arm is relatively rotatably connected to a pin.

7. The internal expanding hanger of claim 1, wherein the top surface of the support protrudes to form an extension, the connecting hole extends upward to the top surface of the extension, and the top end of the hanger rod extends out of the extension from the connecting hole.

8. The internal expanding hanger of claim 1, wherein the hanger rod is a round rod, the support part is formed at the bottom end of the round rod and is integrally formed with the round rod, the top end of the round rod is provided with a lifting hole for connecting a lifting device, the lifting hole penetrates through the round rod along the radial direction of the round rod, and the number of the lifting arms is three.