阅读说明：本技术 一种吊具 (Lifting appliance ) 是由 葛华荣 周阳 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种吊具。吊具用于吊装具有安装孔的壳体,吊具包括一锁件和至少两个起吊臂。锁件形成有一移动孔,锁件内侧壁形成有锁止部。起吊臂外侧壁形成有锁止配合部,起吊臂穿过移动孔后至少部分可伸入安装孔,起吊臂可沿安装孔轴向移动。起吊臂移动至起吊位置,锁止部与锁止配合部脱离,以使至少两个起吊臂沿安装孔径向向外张开以吊起壳体；起吊臂离开起吊位置时,锁止部与锁止配合部相连,以限制起吊臂沿安装孔径向向外张开。根据本发明的一种吊具,能够有效的限制起吊臂的张开,保证吊装的质量。(The invention discloses a lifting appliance. The lifting appliance is used for lifting a shell with a mounting hole and comprises a locking piece and at least two lifting arms. The latch fitting is formed with a removal hole, and the latch fitting inside wall is formed with locking part. The outer side wall of the lifting arm is provided with a locking matching part, at least part of the lifting arm can extend into the mounting hole after passing through the moving hole, and the lifting arm can move axially along the mounting hole. The lifting arms move to the lifting position, and the locking parts are separated from the locking matching parts, so that the at least two lifting arms are radially outwards opened along the mounting holes to lift the shell; when the lifting arm leaves the lifting position, the locking part is connected with the locking matching part to limit the lifting arm to open outwards along the radial direction of the installation hole. According to the lifting appliance, the opening of the lifting arm can be effectively limited, and the lifting quality is ensured.)

1. A hoist for hoisting a housing having a mounting hole, comprising:

the locking piece is provided with a moving hole, and a locking part is formed on the inner side wall of the locking piece; and the number of the first and second groups,

the outer side walls of the lifting arms are provided with locking matching parts, the lifting arms can penetrate through the moving holes and at least partially extend into the mounting holes, and the lifting arms can move axially along the mounting holes;

the lifting arms move to a lifting position, and the locking parts are separated from the locking matching parts, so that at least two lifting arms are outwards opened along the mounting hole in the radial direction to lift the shell; when the lifting arm leaves the lifting position, the locking part is connected with the locking matching part so as to limit the lifting arm to be outwards opened along the radial direction of the mounting hole.

2. The spreader according to claim 1, wherein the lock inner side wall is formed with at least one locking runner which is recessed radially outwardly thereof, the locking runner including a first recess and a second recess which are arranged axially thereof, the second recess having a recessed depth greater than the first recess, the locking portion being formed as the first recess; the outer side wall of the lifting arm is provided with at least one locking sliding block, and the locking matching part is formed into the locking sliding block.

3. The spreader according to claim 1, wherein the inner side wall of the locking member is formed with at least one locking slider, and the locking portion is formed as the locking slider; the outer side wall of the lifting arm is provided with at least one locking sliding groove which is inwards recessed along the radial direction of the lifting arm, the locking sliding groove comprises a first concave part and a second concave part which are arranged along the axial direction, the recessed depth of the second concave part is larger than that of the first concave part, and the locking matching part is formed into the first concave part.

4. The spreader of claim 1, further comprising a mounting member to which the lifting arm is mounted, and at least one resilient member axially movable between the mounting member and the locking member, the resilient member being configured to be compressed when the lifting arm is moved to the lifting position and to return to its original shape when the lifting arm is moved away from the lifting position.

5. The spreader according to claim 4, wherein the elastic member is plural, and the plural elastic members are uniformly arranged in a circumferential direction of the lock.

6. The spreader of claim 4, further comprising at least one fastener, wherein the locking member is formed with a through hole, the fastener comprises a connecting portion and a stop portion, one end of the connecting portion is connected to the stop portion, and the other end of the connecting portion passes through the through hole to be fixedly connected to the mounting member.

7. The spreader according to claim 6, further comprising at least one protective sleeve, wherein the protective sleeve is sleeved outside the connecting portion.

8. The spreader of claim 1, further comprising a mounting member and at least two pivot shafts spaced apart at the mounting member, the lifting arm being rotatably connected to the pivot shafts.

9. The spreader of claim 8, further comprising a slider, at least two of the lifting arms surround to form a sliding hole, the slider passes through the sliding hole and can slide axially along the sliding hole, the outer side wall of the slider is formed with a pushing portion, the inner side wall of the lifting portion is formed with a pushing engagement portion, and when the slider slides a certain position, the pushing portion is connected with the pushing engagement portion to push the lifting arms to rotate around the rotating shaft.

10. The spreader according to claim 1, wherein the lifting arm comprises a rotating portion and a lifting portion provided at one end of the rotating portion and extending radially outwardly therealong.

Technical Field

The invention relates to the technical field of hoisting tools, in particular to a lifting appliance.

Background

The transmission case needs to be transferred by a spreader during assembly. An operator can control the lifting arm of the lifting appliance to stretch into the shell mounting hole and then stretch out to achieve the purposes of lifting the transmission shell and transferring the transmission shell. In actual use, however, the operator does not control the opening of the lifting arm of the spreader accurately. For example, the lifting arm may open prematurely or accidentally during use of the spreader, which may damage the casing walls, resulting in a reduced casing mass.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a lifting appliance which can prevent the lifting arm from opening prematurely or accidentally and ensure the lifting quality of the shell.

The invention also provides a lifting appliance for lifting a shell with a mounting hole, which comprises: the locking piece is provided with a moving hole, and a locking part is formed on the inner side wall of the locking piece; the outer side walls of the lifting arms are provided with locking matching parts, the lifting arms can penetrate through the moving holes and at least partially extend into the mounting holes, and the lifting arms can move axially along the mounting holes; the lifting arms move to a lifting position, and the locking parts are separated from the locking matching parts, so that at least two lifting arms are outwards opened along the mounting hole in the radial direction to lift the shell; when the lifting arm leaves the lifting position, the locking part is connected with the locking matching part so as to limit the lifting arm to be outwards opened along the radial direction of the mounting hole.

In addition, the lifting appliance according to the present invention may have the following additional technical features:

according to some embodiments of the present invention, the locking member inner side wall is formed with at least one locking slide groove recessed radially outward therefrom, the locking slide groove including a first recess and a second recess axially arranged therealong, the second recess having a recess depth greater than the first recess, the locking portion being formed as the first recess; the outer side wall of the lifting arm is provided with at least one locking sliding block, and the locking matching part is formed into the locking sliding block.

According to some embodiments of the invention, the locking piece inner side wall is formed with at least one locking slider, and the locking part is formed as the locking slider; the outer side wall of the lifting arm is provided with at least one locking sliding groove which is inwards recessed along the radial direction of the lifting arm, the locking sliding groove comprises a first concave part and a second concave part which are arranged along the axial direction, the recessed depth of the second concave part is larger than that of the first concave part, and the locking matching part is formed into the first concave part.

According to some embodiments of the invention, the suspension arm further comprises a mounting member and at least one resilient member, the suspension arm being mounted to the mounting member, the locking member being axially movable, the resilient member being disposed between the mounting member and the locking member, the resilient member being configured to be compressed when the suspension arm is moved to the lifting position and to return to its original shape when the suspension arm is moved away from the lifting position.

According to some embodiments of the present invention, the elastic member is provided in plurality, and the plurality of elastic members are uniformly arranged in a circumferential direction of the locking member.

According to some embodiments of the present invention, the locking member further comprises at least one fastening member, the locking member is formed with a through hole, the fastening member comprises a connecting portion and a stopping portion, one end of the connecting portion is connected to the stopping portion, and the other end of the connecting portion passes through the through hole and is fixedly connected to the mounting member.

According to some embodiments of the invention, the device further comprises at least one protective sleeve, and the protective sleeve is sleeved outside the connecting part.

According to some embodiments of the present invention, the lifting arm further comprises a mounting member and at least two rotating shafts, the at least two rotating shafts are spaced apart from each other and are connected to the mounting member, and the lifting arm is rotatably connected to the rotating shafts.

According to some embodiments of the present invention, the lifting arm further includes a slider, at least two of the lifting arms surround to form a sliding hole, the slider passes through the sliding hole and can slide along the sliding hole axially, the slider is formed with a pushing portion on an outer side wall, the lifting portion is formed with a push-fit portion on an inner side wall, and when the slider slides for a certain position, the pushing portion is connected with the push-fit portion to push the lifting arm to rotate around the rotating shaft.

According to some embodiments of the invention, the lifting arm comprises a rotating part and a lifting part, the lifting part being provided at one end of the rotating part and extending radially outwards along the rotating part.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of an expanded hoisting housing of a spreader according to an embodiment of the invention;

figure 2 is a top schematic view of a lock in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of the latch portion and the latch mating portion when coupled according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a lifting arm according to an embodiment of the invention;

reference numerals:

1: hanger, 11: lock, 111: moving hole, 112: perforation, 12: locking runner, 121: locking portion, 122: second recess, 13: elastic member, 14: protective sheath, 15: fastener, 151: connection portion, 152: a stopper portion; 21: lifting arm, 211: rotating part, 212: hoisting part, 213: an upper push fit incline and a lower push fit incline 214; 22: mounting member, 23: locking engagement portion, 231: locking slider, 24: slider, 241: upper push ramp, 242: pushing the inclined plane downwards; 25: a rotating shaft; 3: a housing, 31: and (7) installing holes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A spreader 1 according to an embodiment of the invention is described below with reference to figures 1 to 4. The spreader 1 is used to hoist the housing 3. The housing is formed with a mounting hole 31. The spreader 1 comprises at least two lifting arms 21 and a lock 11. The locking member 11 is formed with a moving hole 111. The lifting arm 21 extends at least partially into the mounting hole 31 after passing through the moving hole 111, and the lifting arm 21 can move axially along the mounting hole 31. As shown in the area marked B in fig. 1, the inner sidewall of the locking piece 11 is formed with at least a locking portion 121. The outer side wall of the lifting arm 21 is formed with at least one locking engagement portion 23. When the lifting arm 21 is moved axially along the mounting hole 31 to the lifting position, as shown in fig. 1, the locking portion 121 is disengaged from the locking engagement portion 23, and the lifting arm 21 is expanded radially outward along the mounting hole 31 to lift the housing 3. As shown in fig. 3, when the lifting arm 21 leaves the lifting position, the locking portion 121 is connected to the locking engagement portion 23 to restrict the lifting arm 21 from opening outward in the radial direction.

That is, when the reaching position where the lifting arm 21 reaches into the mounting hole 31 is not at the lifting position, for example, the initial stage when the spreader 1 is axially moved from top to bottom to gradually approach the lifting position and the later stage when the spreader 1 is gradually moved from bottom to top from the lifting position after the completion of the lifting, the locking portion 121 and the locking engaging portion 23 are connected to cooperate to lock the lifting arm 21, thereby restricting the lifting arm 21 from being opened outward in the radial direction. When the projecting position of the lifting arm 21 is in the lifting position, for example the position shown in fig. 1 and during the transfer of the housing 3 by lifting, the locking part 121 and the locking counter-part 23 are disengaged, so that the lifting arm 21 is no longer locked, whereby the lifting arm 21 opens the lifting housing 3 radially outwards. Like this, at the in-process that hoist and mount shifted casing 3, hoist 1 can avoid the too early or unexpected condition of opening of lifting arm 21, avoids damaging casing 3, guarantees casing 3 hoist and mount quality.

According to some embodiments of the present invention, as shown in fig. 1 or 3, the inner sidewall of the locking member 11 is formed with at least one locking slide groove 12 recessed radially outward therefrom. The locking slide 12 comprises a first and a second recess 122 arranged in the axial direction. The second recess 122 has a greater recess depth than the first recess. The locking portion 121 is formed as a first concave portion. The outer side wall of the lifting arm 21 is formed with at least one locking stopper 231 extending radially outwardly thereof. The lock engagement portion 23 is formed as a lock slider 231. Thus, when the lifting arm 21 is moved to the lifting position, the locking slider 231 is disengaged from the first to second recesses 122, and the lifting arm 21 can be expanded radially outward along the mounting hole 31 to lift the housing 3. When the lifting arm 21 leaves the lifting position, the bottom wall of the first concave portion abuts against the locking slider 231, so that the lifting arm 21 is restricted and cannot be opened outward in the radial direction along the mounting hole 31.

In other modified examples, the inner sidewall of the locking piece 11 is formed with at least one locking stopper 231. The locking portion 121 is formed to lock the slider 231. The outer side wall of the lifting arm 21 is formed with at least one locking runner 12 recessed inwards in the radial direction thereof. The locking slide 12 comprises a first and a second recess 122 arranged in the axial direction. The second recess 122 has a greater recess depth than the first recess. The lock engagement portion 23 is formed as a first recess. Thus, when the lifting arm 21 is moved to the lifting position, the locking slider 231 is disengaged from the first to second recesses 122, and the lifting arm 21 can be expanded radially outward along the mounting hole 31 to lift the housing 3. When the lifting arm 21 leaves the lifting position, the bottom wall of the first concave portion abuts against the locking slider 231, so that the lifting arm 21 is restricted and cannot be opened outward in the radial direction along the mounting hole 31.

According to some embodiments of the invention, as shown in fig. 1, the spreader 1 comprises a mounting member 22 for mounting the lifting arm 21 and at least one resilient member 13. The locking element 11 is movable in the axial direction of the spreader 1, and at least one resilient element 13 is arranged between the mounting element 22 and the locking element 11, the resilient element 13 being configured to be compressed when the lifting arm 21 is moved to the lifting position and to return to its original shape when the lifting arm 21 is moved away from the lifting position. Thus, the elastic member 13 can exert not only an elastic restoring force for connecting the locking portion 121 and the lock engagement portion 23 to each other, so that the lifting arm 21 of the spreader 1 is locked again by the locking portion 121 and the lock engagement portion 23, but also a force for moving away from the lifting position can be exerted on the spreader 1, thereby saving the time for moving away the spreader 1 and the lifting force.

Further, as shown in fig. 1 and 2, the elastic member 13 is plural, and the plural elastic members 13 are uniformly arranged along the circumferential direction of the locking piece 11. The uniform arrangement of the plurality of elastic members 13 allows the locking unit 11 to be uniformly stressed. For example, as shown in fig. 2, the locking member 11 is provided with four blind holes at regular intervals in the circumferential direction, and the elastic member 13 is at least partially disposed in the blind holes. The elastic member 13 is a member having elasticity, such as an elastic sleeve, a spring, or the like.

According to some embodiments of the invention, the spreader 1 further comprises at least one fastener 15. Locking element 11 is formed with an aperture 112. The fastener 15 includes a connecting portion 151 and a stopping portion 152. The connecting portion 151 has one end connected to the stopping portion 152 and the other end passing through the through hole 112 to be fixedly connected to the mounting member 22. Thereby, the lock 11 can move between the mounting piece 22 and the stopper 152. That is, the fastener 15 limits the moving distance of the locker 11, increases the connection tightness of the locker 11, and prevents the locker 11 from being unintentionally separated from the lifting arm 21.

Further, as shown in fig. 2 and 3, the spreader 1 comprises at least one protective sheath 14, the protective sheath 14 being connected to the mounting member 22 and the locking member 11, respectively. The protective sleeve 14 is sleeved outside the connecting portion. The protective sleeve 14 may avoid excessive wear of the fastener 15.

According to some embodiments of the invention, the lifting arm 21 comprises a turning part 211 and a lifting part 212, as shown in fig. 4. The hanging portion 212 is provided at one end of the rotating portion 211 and extends outward in a radial direction thereof. The lifting part 212 can increase the reliability of lifting and prevent the housing 3 from falling off during the lifting and transferring process.

According to some embodiments of the invention, as shown in fig. 1, the spreader 1 further comprises a mounting member 22 and at least two pivot shafts 25, the at least two pivot shafts 25 being spaced apart from each other at the mounting member 22, and the lifting arm 21 being rotatably connected to the pivot shafts 25. A clockwise or counterclockwise rotation of the lifting arm 21 about the pivot axis 25 makes it possible to contract the lifting arm 21 radially inwards or to expand it radially outwards, respectively.

Specifically, the hanger 1 further includes a slider 24, at least two lifting arms 21 surround to form a sliding hole, the slider 24 passes through the sliding hole and can slide axially along the sliding hole, the outer side wall of the slider 24 is formed with a pushing portion, the inner side wall of the lifting arm 21 is formed with a pushing matching portion, and when the slider 24 slides for a certain position, the pushing portion is connected with the pushing matching portion to push the lifting arm 21 to rotate around the rotating shaft 25. More specifically, as shown in fig. 1, the inner side wall of the lifting arm 21 is formed with an upper push-fit inclined surface 213 and a lower push-fit inclined surface 214. The slider 24 has an upper push slope 241 and a lower push slope 242 formed on the outer side wall thereof. Thus, when the slider 24 is lifted and the upper push inclined surface 241 contacts the upper push matching inclined surface 213, the slider 24 continues to move upward to push the at least two lifting arms 21 to rotate clockwise around the rotating shaft 25. In this way, the parts of the lifting arms 21 above the rotation axis 25 are radially distanced from each other and the parts of the lifting arms 21 below the rotation axis 25 are brought closer to each other due to the leverage of the rotation axis 25. That is, the part of the lifting arm 21 below the rotating shaft 25 is contracted radially inward. When the slide 24 moves down and the lower push inclined surface 242 contacts the lower push fit inclined surface 214 on the inner side wall of the lifting arm, the slide 24 further moves down to push at least two lifting arms 21 to rotate counterclockwise around the rotating shaft 25. In this way, the parts of the lifting arms 21 located below the swivel axis 25 will be radially distanced from each other, i.e. the lifting arms 21 will be splayed radially outwards to lift the housing 3.

Further, the specific operating conditions of the spreader 1 as shown in fig. 1-4 are as follows:

when the spreader 1 is used for hoisting, as shown in fig. 3, the lock 11 is in the locked position when the spreader 1 is in the initial state, even if the locking portion 121 and the locking engagement portion 23 are connected, the locking portion 121 restricts the lifting arm 21 from opening outward in the radial direction. That is, the lifting arm 21 is in the contracted state.

In the process that the operator moves the spreader 1 downwards, the lifting arm 21 is moved downwards to reach the middle of the mounting hole 31 of the housing 3. The lock 11 and the lifting arm 21 are moved synchronously downwards relative to the housing 3, the lock 11 always being in the locked position. In this way, the lifting arm 21 can no longer be opened radially outwards even if the operator slides the slide 24 early. Therefore, the mounting hole 31 of the housing 3 is not damaged.

The operator continues to move the spreader 1 downwards. The locking piece 11 is in contact with the end surface of the shell 3 and is stopped by the end surface of the shell 3, the locking piece 11 and the lifting arm 21 do not move synchronously any more, namely, the lifting arm 21 continues to move downwards relative to the shell 3, the locking piece 11 is static and motionless relative to the shell 3, then the locking piece 11 moves upwards relative to the lifting arm 21, namely, the locking piece 11 moves upwards along the axial direction of the lifting arm 21 and gradually leaves from a locking position, meanwhile, the elastic piece 13 is gradually compressed, and the locking matching part 23 gradually leaves from the locking part 121.

As shown in fig. 1, when the lifting arm 21 is in the lifting position, that is, the lifting part 212 of the lifting arm 21 is located below the joint of the first diameter part and the second diameter part of the mounting hole 31, the locking part 23 is completely separated from the locking part 121, and the lifting arm can be opened radially outward along the mounting hole 31, so that the lifting part 212 of the lifting arm 21 supports the joint of the first diameter part and the second diameter part of the mounting hole 31 to lift the housing 3.

When the housing 3 is transferred into position, the slider 24 is slid upwards and the lifting arm 21 is no longer spread open. That is, the lifting arm 21 is contracted inward in the radial direction to the retracted state. The latch 11 is returned to the latching position along the axial direction of the boom arm 21 by the elastic restoring force of the elastic member 13, and the boom arm 21 is latched by the latching portion 121 on the inner side wall of the latch 11. In this way, the lifting arm 21 cannot open any more to damage the housing 3 during the gradual upward movement of the spreader 1 out of the mounting hole 31, even if the operator accidentally slides the slider 24.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of "some embodiments," "optionally," "further," or "particular embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.