A lifting device

Abstract

The present invention discloses a lifting device. The lifting device is used for lifting a shell with a mounting hole, and the lifting device includes a locking member and at least two lifting arms. The locking member is formed with a movable hole, and a locking portion is formed on the inner side wall of the locking member. A locking fitting portion is formed on the outer side wall of the lifting arm, and the lifting arm can at least partially extend into the mounting hole after passing through the movable hole, and the lifting arm can move axially along the mounting hole. When the lifting arm moves to the lifting position, the locking portion is disengaged from the locking fitting portion, so that at least two lifting arms are radially opened outward along the mounting hole to lift the shell; when the lifting arm leaves the lifting position, the locking portion is connected to the locking fitting portion to limit the lifting arm from radially opening outward along the mounting hole. A lifting device according to the present invention can effectively limit the opening of the lifting arm and ensure the quality of lifting.

Description

Technical Field

[0001] The invention relates to the technical field of lifting tools, in particular to a lifting device. Background Art

[0002] The transmission housing needs to be transferred by a hoist during the assembly process. The operator controls the lifting arm of the hoist to extend into the housing mounting hole and then open it to achieve the purpose of lifting the transmission housing and transferring it. However, in actual use, the operator's control over the opening of the lifting arm of the hoist is not precise. For example, during the use of the hoist, the lifting arm may be opened prematurely or accidentally, which may damage the housing wall and reduce the quality of the housing. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a lifting device that can avoid the situation of premature or accidental opening of the lifting arm and ensure the quality of shell lifting.

[0004] The present invention also proposes a lifting device for lifting a shell with a mounting hole, comprising: a locking member, the locking member is formed with a movable hole, the inner side wall of the locking member is formed with a locking portion; and at least two lifting arms, the outer side walls of the lifting arms are formed with locking fitting portions, the lifting arms can at least partially extend into the mounting hole after passing through the movable hole, and the lifting arms can move axially along the mounting hole; when the lifting arms move to the lifting position, the locking portion disengages from the locking fitting portion, so that at least two of the lifting arms are radially opened outward along the mounting hole to lift the shell; when the lifting arms leave the lifting position, the locking portion is connected to the locking fitting portion to limit the lifting arms from radially opening outward along the mounting hole.

[0005] In addition, the sling according to the present invention may also have the following additional technical features:

[0006] According to some embodiments of the present invention, the inner side wall of the locking element is formed with at least one locking groove which is recessed radially outward, and the locking groove includes a first recess and a second recess arranged along its axial direction, the recess depth of the second recess is greater than that of the first recess, and the locking portion is formed as the first recess; the outer side wall of the lifting arm is formed with at least one locking slider, and the locking mating portion is formed as the locking slider.

[0007] According to some embodiments of the present invention, at least one locking slider is formed on the inner side wall of the locking element, and the locking portion is formed as the locking slider; the outer side wall of the lifting arm is formed with at least one locking groove which is recessed radially inward, and the locking groove includes a first recess and a second recess arranged along the axial direction, the recess depth of the second recess is greater than that of the first recess, and the locking matching portion is formed as the first recess.

[0008] According to some embodiments of the present invention, the invention further includes a mounting member and at least one elastic member, wherein the lifting arm is mounted on the mounting member, the locking member can move axially, the elastic member is arranged between the mounting member and the locking member, and the elastic member is configured to be compressed when the lifting arm moves to the lifting position and to return to its original state when the lifting arm leaves the lifting position.

[0009] According to some embodiments of the present invention, there are a plurality of elastic members, and the plurality of elastic members are evenly arranged along the circumference of the locking member.

[0010] According to some embodiments of the present invention, at least one fastener is further included, the locking member is formed with a through hole, the fastener includes a connecting portion and a stopping portion, one end of the connecting portion is connected to the stopping portion, and the other end passes through the through hole and is fixedly connected to the mounting member.

[0011] According to some embodiments of the present invention, at least one protective sleeve is further included, and the protective sleeve is sleeved on the outside of the connecting portion.

[0012] According to some embodiments of the present invention, the invention further comprises a mounting member and at least two rotating shafts, wherein the at least two rotating shafts are arranged at intervals on the mounting member, and the lifting arm is rotatably connected to the rotating shafts.

[0013] According to some embodiments of the present invention, a sliding member is further included, at least two of the lifting arms are combined to form a sliding hole, the sliding member passes through the sliding hole and can slide axially along the sliding hole, the outer wall of the sliding member is formed with a pushing portion, and the inner arm of the lifting portion is formed with a pushing matching portion, when the sliding member slides to a certain position, the pushing portion is connected to the pushing matching portion to push the lifting arm to rotate around the rotating shaft.

[0014] According to some embodiments of the present invention, the lifting arm includes a rotating portion and a lifting portion, and the lifting portion is provided at one end of the rotating portion and extends radially outwardly thereof.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a structural schematic diagram of a hoisting shell with a hoisting device opened according to an embodiment of the present invention;

[0018] Figure 2 is a schematic top view of a lock according to an embodiment of the present invention;

[0019] Figure 3 is a structural schematic diagram of a locking portion and a locking matching portion connected to each other according to an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of a lifting arm according to an embodiment of the present invention;

[0021] Reference numerals:

[0022] 1: sling, 11: locking member, 111: moving hole, 112: through hole, 12: locking slide groove, 121: locking portion, 122: second recess, 13: elastic member, 14: protective cover, 15: fastener, 151: connecting portion, 152: stopping portion; 21: lifting arm, 211: rotating portion, 212: lifting portion, 213: upper push matching slope, 214 lower push matching slope; 22: mounting member, 23: locking matching portion, 231: locking slider, 24: sliding member, 241: upper push slope, 242: lower push slope; 25: rotating shaft; 3: housing, 31: mounting hole. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] In the description of the present invention, it is to be understood that the terms “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Please refer to the following Figure 1-Figure 4 The sling 1 according to an embodiment of the present invention is described. The sling 1 is used for slinging a housing 3. The housing is formed with a mounting hole 31. The sling 1 includes at least two lifting arms 21 and a locking member 11. The locking member 11 is formed with a moving hole 111. After the lifting arms 21 pass through the moving hole 111, at least a portion of the lifting arms 21 extends into the mounting hole 31, and the lifting arms 21 can move axially along the mounting hole 31. Figure 1 As shown in the area marked at B in the figure, the inner wall of the lock 11 is formed with at least one locking portion 121. The outer wall of the lifting arm 21 is formed with at least one locking matching portion 23. When the lifting arm 21 moves axially along the mounting hole 31 to the lifting position, as shown in FIG. Figure 1 As shown, the locking portion 121 is disengaged from the locking mating portion 23, and the lifting arm 21 is radially opened outward along the mounting hole 31 to lift the housing 3. Figure 3 As shown, when the lifting arm 21 leaves the lifting position, the locking portion 121 is connected to the locking matching portion 23 to limit the lifting arm 21 from opening radially outward.

[0028] That is, when the lifting arm 21 is inserted into the mounting hole 31 and is not in the lifting position, for example, in the initial stage when the lifting device 1 moves axially from top to bottom and gradually approaches the lifting position, and in the later stage when the lifting device 1 gradually moves from bottom to top and gradually leaves the lifting position after the lifting is completed, the locking portion 121 and the locking matching portion 23 are connected and matched to lock the lifting arm 21, thereby limiting the lifting arm 21 from radially opening outward. When the extension position of the lifting arm 21 is in the lifting position, for example Figure 1 In the position shown and during the lifting and transfer of the housing 3, the locking portion 121 and the locking matching portion 23 are disengaged, so that the lifting arm 21 is no longer locked, and thus the lifting arm 21 is opened radially outward to lift the housing 3. In this way, during the lifting and transfer of the housing 3, the lifting device 1 can prevent the lifting arm 21 from opening too early or accidentally, avoid damaging the housing 3, and ensure the lifting quality of the housing 3.

[0029] According to some embodiments of the present invention, Figure 1 or Figure 3As shown, the inner wall of the lock 11 is formed with at least one locking slide groove 12 which is recessed radially outward. The locking slide groove 12 includes a first recess and a second recess 122 arranged in the axial direction. The recess depth of the second recess 122 is greater than that of the first recess. The locking portion 121 is formed as the first recess. The outer wall of the lifting arm 21 is formed with at least one locking slider 231 which extends radially outward. The locking matching portion 23 is formed as the locking slider 231. Thus, when the lifting arm 21 moves to the lifting position, the locking slider 231 is separated from the first recess to the second recess 122, and the lifting arm 21 can be radially opened 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 recess abuts against the locking slider 231, and then the lifting arm 21 is restricted and can no longer be radially opened outward along the mounting hole 31.

[0030] In other modified examples, at least one locking slider 231 is formed on the inner side wall of the lock 11. The locking portion 121 is formed as a locking slider 231. At least one locking slide groove 12 is formed on the outer side wall of the lifting arm 21, which is recessed radially inward. The locking slide groove 12 includes a first recess and a second recess 122 arranged along the axial direction. The recess depth of the second recess 122 is greater than that of the first recess. The locking matching portion 23 is formed as the first recess. As a result, when the lifting arm 21 moves to the lifting position, the locking slider 231 disengages from the first recess to the second recess 122, and the lifting arm 21 can be radially opened 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 recess abuts against the locking slider 231, and then the lifting arm 21 is restricted and can no longer be radially opened outward along the mounting hole 31.

[0031] According to some embodiments of the present invention, Figure 1 As shown, the sling 1 includes a mounting member 22 for mounting a lifting arm 21 and at least one elastic member 13. The locking member 11 can move along the axial direction of the sling 1, and at least one elastic member 13 is provided between the mounting member 22 and the locking member 11. The elastic member 13 is configured to be compressed when the lifting arm 21 moves to the lifting position, and to restore to its original state when the lifting arm 21 leaves the lifting position. Thus, the elastic member 13 can not only exert an elastic restoring force that interconnects the locking portion 121 and the locking matching portion 23, so that the lifting arm 21 of the sling 1 is locked again by the locking portion 121 and the locking matching portion 23, but also exert a force to the sling 1 to leave the lifting position, thereby saving the time and lifting force for the sling 1 to leave.

[0032] Furthermore, combined with Figure 1 and Figure 2 As shown, there are multiple elastic members 13, and the multiple elastic members 13 are evenly arranged along the circumference of the lock member 11. The uniform arrangement of the multiple elastic members 13 can make the lock member 11 evenly stressed. Figure 2As shown, the lock member 11 is provided with four blind holes evenly spaced apart along the circumference, and the elastic member 13 is at least partially provided in the blind holes. The elastic member 13 is an elastic component, such as an elastic sleeve, a spring, etc.

[0033] According to some embodiments of the present invention, the sling 1 further includes at least one fastener 15. The lock 11 is formed with a through hole 112. The fastener 15 includes a connecting portion 151 and a stopper 152. One end of the connecting portion 151 is connected to the stopper 152, and the other end passes through the through hole 112 and is fixedly connected to the mounting member 22. Thus, the lock 11 can move between the mounting member 22 and the stopper 152. In other words, the fastener 15 limits the moving distance of the lock 11, increases the connection tightness of the lock 11, and prevents the lock 11 from being separated from the lifting arm 21 without reason.

[0034] Furthermore, if Figure 2 and 3 As shown, the sling 1 includes at least one protective cover 14, which is respectively connected to the mounting member 22 and the locking member 11. The protective cover 14 is sleeved on the outside of the connecting portion. The protective cover 14 can prevent the fastener 15 from excessive wear.

[0035] According to some embodiments of the present invention, Figure 4 As shown, the lifting arm 21 includes a rotating portion 211 and a lifting portion 212. The lifting portion 212 is arranged at one end of the rotating portion 211 and extends radially outward. The lifting portion 212 can increase the reliability of lifting and prevent the housing 3 from falling during the lifting and transfer process.

[0036] According to some embodiments of the present invention, Figure 1 As shown, the lifting device 1 further includes a mounting member 22 and at least two rotating shafts 25, at least two rotating shafts 25 are spaced apart on the mounting member 22, and the lifting arm 21 is rotatably connected to the rotating shaft 25. The lifting arm 21 rotates clockwise or counterclockwise along the rotating shaft 25 to cause the lifting arm 21 to contract radially inward or expand radially outward accordingly.

[0037] Specifically, the lifting device 1 further includes a slide 24, at least two lifting arms 21 enclose a slide hole, the slide 24 passes through the slide hole and can slide axially along the slide hole, the outer wall of the slide 24 is formed with a push portion, the inner wall of the lifting arm 21 is formed with a push matching portion, when the slide 24 slides to a certain position, the push portion is connected with the push matching portion to push the lifting arm 21 to rotate around the rotating shaft 25. More specifically, as Figure 1As shown, the inner wall of the lifting arm 21 is formed with an upper push-fitting inclined surface 213 and a lower push-fitting inclined surface 214. The outer wall of the slide 24 is correspondingly formed with an upper push-fitting inclined surface 241 and a lower push-fitting inclined surface 242. Therefore, when the slide 24 rises and the upper push-fitting inclined surface 241 contacts the upper push-fitting inclined surface 213, the slide 24 continues to move upward to push at least two lifting arms 21 to rotate clockwise around the rotating shaft 25. In this way, the parts of the lifting arms 21 located above the rotating shaft 25 will move away from each other in the radial direction, and the parts of the lifting arms 21 located below the rotating shaft 25 will move closer to each other due to the lever action of the rotating shaft 25. In other words, the parts of the lifting arms 21 located below the rotating shaft 25 will shrink inward in the radial direction. When the slide 24 moves downward and the lower push-fitting inclined surface 242 contacts the lower push-fitting inclined surface 214 of the inner wall of the lifting arm, the slide 24 continues to move downward 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 below the rotating shaft 25 will move away from each other in the radial direction, that is, the lifting arms 21 will expand radially outward to lift the housing 3 .

[0038] Furthermore, if Figure 1-4 The specific working conditions of the spreader 1 shown are as follows:

[0039] Use lifting device 1 for lifting, such as Figure 3 As shown, when the lifting device 1 is in the initial state, the lock 11 is in the locked position, that is, the locking portion 121 is in the position connected to the locking matching portion 23, and the locking portion 121 restricts the lifting arm 21 from opening radially outward. In other words, the lifting arm 21 is in a retracted state.

[0040] When the operator moves the lifting device 1 downward and the lifting arm 21 moves downward and extends into the middle of the mounting hole 31 of the housing 3, the locking member 11 and the lifting arm 21 move downward synchronously relative to the housing 3, and the locking member 11 is always in the locked position. In this way, even if the operator slides the slide 24 in advance, the lifting arm 21 cannot be opened radially outward at this time. Therefore, the mounting hole 31 of the housing 3 will not be damaged.

[0041] The operator continues to move the lifting device 1 downward. The lock 11 contacts the end surface of the housing 3 and is blocked by the end surface of the housing 3. The lock 11 and the lifting arm 21 no longer move synchronously, that is, the lifting arm 21 continues to move downward relative to the housing 3, and the lock 11 is stationary relative to the housing 3. Then the lock 11 moves upward relative to the lifting arm 21, that is, the lock 11 moves upward along the axial direction of the lifting arm 21 and gradually leaves the locking position. At the same time, the elastic member 13 is gradually compressed, and the locking matching portion 23 gradually separates from the locking portion 121.

[0042] like Figure 1As shown, when the lifting arm 21 is in the lifting position, that is, the lifting portion 212 of the lifting arm 21 is located below the connection between the first diameter portion and the second diameter portion of the mounting hole 31, the locking fitting portion 23 is completely separated from the locking portion 121, and the lifting arm can be opened radially outward along the mounting hole 31. In this way, the lifting portion 212 of the lifting arm 21 supports the connection between the first diameter portion and the second diameter portion of the mounting hole 31, so as to achieve the purpose of lifting the shell 3.

[0043] When the shell 3 is transferred to the right position, the slide 24 is slid upward, and the lifting arm 21 is no longer stretched. In other words, the lifting arm 21 is retracted radially inward to the retracted state. The locking member 11 is axially restored to the locked position of the lifting arm 21 under the elastic restoring force of the elastic member 13, and the lifting arm 21 is locked by the locking portion 121 on the inner wall of the locking member 11. In this way, during the process of the sling 1 gradually moving upward and leaving the mounting hole 31, even if the operator accidentally slides the slide 24, the lifting arm 21 cannot be opened again to damage the shell 3.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "specific embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A sling, characterized in that: Used for hoisting housings with mounting holes, including: a lock, the lock is formed with a moving hole, the inner side wall of the lock is formed with a locking portion; and at least two lifting arms, the outer side walls of the lifting arms are formed with locking matching portions, the lifting arms can at least partially extend into the mounting hole after passing through the moving hole, and the lifting arms can move axially along the mounting hole; When the lifting arm moves to the lifting position, the locking portion is disengaged from the locking matching portion, so that at least two of the lifting arms are radially outwardly opened along the mounting hole to lift the housing; when the lifting arm leaves the lifting position, the locking portion is connected to the locking matching portion to limit the lifting arm from radially opening outwardly along the mounting hole; The inner side wall of the lock is formed with at least one locking slide groove which is recessed radially outward, the locking slide groove includes a first recess and a second recess which are arranged axially, the recess depth of the second recess is greater than that of the first recess, and the locking portion is formed as the first recess; the outer side wall of the lifting arm is formed with at least one locking slider, and the locking matching portion is formed as the locking slider; The inner wall of the locking element is formed with at least one locking slider, and the locking portion is formed as the locking slider; the outer wall of the lifting arm is formed with at least one locking groove which is recessed radially inward, and the locking groove includes a first recess and a second recess arranged along the axial direction, the recess depth of the second recess is greater than that of the first recess, and the locking matching portion is formed as the first recess.

2. The sling according to claim 1, characterized in that: It also includes a mounting member and at least one elastic member, the lifting arm is mounted on the mounting member, the locking member can move axially, the elastic member is arranged between the mounting member and the locking member, and the elastic member is configured to be compressed when the lifting arm moves to the lifting position and to return to its original state when the lifting arm leaves the lifting position.

3. The sling according to claim 2, characterized in that: There are multiple elastic members, and the multiple elastic members are evenly arranged along the circumference of the locking member.

4. The sling according to claim 2, characterized in that: It also includes at least one fastener, the locking member is formed with a through hole, the fastener includes a connecting portion and a stopping portion, one end of the connecting portion is connected to the stopping portion, and the other end passes through the through hole and is fixedly connected to the mounting member.

5. The sling according to claim 4, characterized in that: It also includes at least one protective sleeve, which is sleeved on the outside of the connecting part.

6. The sling according to claim 1, characterized in that: It also includes a mounting member and at least two rotating shafts. The at least two rotating shafts are arranged on the mounting member at intervals, and the lifting arm is rotatably connected to the rotating shafts.

7. The sling according to claim 6, characterized in that: It also includes a sliding piece, at least two of the lifting arms are surrounded to form a sliding hole, the sliding piece passes through the sliding hole and can slide axially along the sliding hole, the outer wall of the sliding piece is formed with a pushing portion, and the inner arm of the lifting wall is formed with a pushing matching portion, when the sliding piece slides to a certain position, the pushing portion is connected to the pushing matching portion to push the lifting arm to rotate around the rotating shaft.

8. The sling according to claim 1, characterized in that: The lifting arm comprises a rotating part and a lifting part, wherein the lifting part is arranged at one end of the rotating part and extends outwardly along the radial direction thereof.

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