Special lifting appliance capable of centering

Abstract

The utility model relates to a lifting appliance, in particular to a special centering lifting appliance, which solves the problem that the normal use of the conventional lifting appliance is influenced due to the fact that threads are easy to clamp after the conventional lifting appliance is used for a long time. The device comprises a hanging rod, a spring, a compression piece, a hanging plate and a middle connecting piece, the spring and the compression piece are both arranged on the hanging rod in a sleeving mode, and the compression piece is located at the top end of the spring and abuts against the spring. The middle connecting piece is connected to the bottom end of the hanging rod, and the bottom end of the spring is located above the top end of the middle connecting piece and abuts against the top end of the middle connecting piece or is fixed to the hanging rod. The hanging plates are hinged to the middle connecting piece, each hanging plate is provided with a centering arc used for being matched with a bearing hole of the motor shell to be hoisted, and the radian of the centering arc is matched with that of the bearing hole; and each hanging plate is connected with the compression piece through a traction rope.

Description

Technical Field

[0001] The utility model relates to a sling, in particular to a special sling capable of centering. Background Art

[0002] In recent years, with the continuous development of electric vehicle industry technology, motor manufacturing technology has also been constantly developing and changing. Because the weight of electric vehicles affects the range, in order to reduce the weight of electric vehicles, the shell of existing motors is generally made of high-strength and light-weight aluminum alloy. However, aluminum alloy is very easy to be bumped and scratched. During the machining stage, operators generally use simple hooks to lift the motor housing to complete loading and unloading. This lifting method is not easy to control the posture of the motor housing, and it is easy to cause bumps and scratches during transportation.

[0003] The Chinese utility model patent with announcement number CN203568663U discloses a self-centering outward-expanding lifting device, including a pull rod-pull frame assembly, a retaining ring, a tightening disk assembly, a snap ring assembly, a pin shaft and a hook assembly; the pull rod-pull frame assembly is composed of a lifting ring, a connecting ring, an upper pull rod, a lower pull rod and a pull frame, the cross-section of the lower pull rod is a prismatic column, and grooves for installing the hook assembly are evenly distributed around the pull frame; the hook assembly is composed of a suspension rod and a suspension hook, the suspension hook is outward-expanded, and the head of the suspension rod has an inclined surface opposite to the outward expansion direction of the suspension hook; the tightening disk assembly is composed of a turntable and an internally threaded sleeve; the snap ring assembly is composed of an externally threaded sleeve and a chuck, and the center has a prismatic hole that matches the lower pull rod; the suspension rod is installed in the groove around the pull frame through a pin shaft and can rotate around the pin shaft, and the inclined surface of the suspension rod head can extend into or out of the chuck and is always in close contact with the inner edge of the outer periphery of the chuck.

[0004] However, when it is in use, the opening and closing of the three hooks need to be achieved by rotating the tightening disc assembly. After long-term use, the threads are prone to getting stuck, affecting normal use. Utility Model Content

[0005] The utility model aims to solve the problem that the threads of the existing slings are easily stuck after long-term use, thus affecting normal use, and to provide a special sling capable of centering.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A special centerable sling, which is special in that it includes a sling rod, a spring, a compression piece, a hanging plate and an intermediate connecting piece;

[0008] The spring and the compression member are both sleeved on the suspension rod, and the compression member is located at the top of the spring and abuts against it;

[0009] The intermediate connecting member is connected to the bottom end of the suspension rod, and the bottom end of the spring is located above the top end of the intermediate connecting member, abutting against the top end of the intermediate connecting member or fixed on the suspension rod;

[0010] There are multiple hanging plates, all of which are hinged to the middle connecting piece, and each hanging plate is provided with a centering arc for matching with the bearing hole of the motor housing to be hoisted, and the curvature of the centering arc is adapted to the curvature of the bearing hole;

[0011] Each hanging plate is connected to the compression member by a traction rope.

[0012] Furthermore, the inner end of the hanging plate is hinged to the middle connecting piece, and a mounting hole is opened through the outer end in the horizontal direction. A centering piece is arranged on the hanging plate, and a groove is arranged at the bottom of the centering piece. The outer end of the hanging plate is located in the groove, and a locking hole is opened through the side wall of the centering piece corresponding to the position of the mounting hole. The centering piece is fixedly connected to the hanging plate by bolts passing through the mounting hole and the locking hole; a centering protrusion is arranged on the top of the centering piece, and the centering protrusion is arranged close to the inner end of the centering piece, and the centering arc is arranged on the outer wall of the centering protrusion close to the outer end of the centering piece.

[0013] Furthermore, there are three hanging plates and they are evenly distributed along the circumferential direction of the suspension rod. Three connecting parts are correspondingly arranged on the middle connecting piece. Each connecting part includes two symmetrically arranged connecting ears. The inner end of the hanging plate is located between the two connecting ears. A hinge hole is opened through the inner end of the hanging plate in the horizontal direction. A connecting hole is opened on the connecting ear corresponding to the hinge hole. The three hanging plates are respectively connected to the three connecting parts through the hinge hole, the connecting hole and the pin shaft. The tail of the pin shaft abuts against the outer wall of the connecting ear on one side, and a retaining spring is sleeved on the front end. The retaining spring abuts against the outer wall of the connecting ear on the other side.

[0014] Furthermore, the intermediate connecting member has a limiting groove on the side wall between the two connecting ears, and the inner end of the hanging plate is located in the limiting groove; the upper edge height of the limiting groove satisfies the following conditions: when the top surface of the inner end of the hanging plate abuts against the upper edge of the limiting groove, the top surface of the hanging plate is in a horizontal state.

[0015] Furthermore, the compression member includes a compression ring and a guide cylinder, wherein the guide cylinder is located at the top of the compression ring and is integrally arranged with the compression ring, and the bottom of the compression ring abuts against the top of the spring.

[0016] Furthermore, a first rope hole for connecting a traction rope is opened on the hanging plate, and a second rope hole is opened on the centering protrusion of the centering piece corresponding to the first rope hole. One end of the traction rope is connected to the compression ring, and the other end passes through the second rope hole and then is connected to the hanging plate through the first rope hole.

[0017] Furthermore, a lifting ring is connected to the top of the suspension rod to facilitate connection with a lifting device.

[0018] Furthermore, the traction rope is a nylon traction rope, which has high strength and good toughness and is suitable for long-term use.

[0019] Furthermore, a threaded hole is provided at the top center of the intermediate connector, and a threaded section matching the threaded hole is provided at the bottom end of the suspension rod. The intermediate connector and the suspension rod are detachably connected, and different motor housings can be adapted by replacing different intermediate connectors, thereby improving the versatility of the suspension device.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] (1) The utility model provides a special centerable hanger which applies a downward force to the compression part to cause the spring to contract and accumulate elastic potential energy. Because the hanging plate is hinged on the middle connecting part and the hanging plate and the compression part are connected by a traction rope, when the compression part moves downward, the hanging plate also rotates downward and opens. When the centering arc on the hanging plate abuts against the bearing hole of the motor housing to be hoisted, the centering is completed. At this time, the force applied to the compression part is removed, and the posture control of the motor housing can be achieved by lifting the entire hanger through the suspension rod. The compression part that drives the hanging plate to move is mounted on the suspension rod and then slides up and down on the suspension rod. No threads are used, so there is no risk of jamming.

[0022] (2) The utility model provides a special-purpose centering sling, in which a centering arc for cooperating with a bearing hole is arranged on a centering piece, and the centering piece is detachably connected to a hanging plate. In this way, different sizes of bearing holes can be adapted by replacing different centering pieces, thereby improving the versatility of the entire sling.

[0023] (3) The utility model provides a special centerable lifting device with a limiting groove on the side wall between the two connecting ears of the intermediate connecting piece. The inner end of the hanging plate is located in the limiting groove. When the top surface of the inner end of the hanging plate abuts against the upper edge of the limiting groove, the top surface of the hanging plate is in a horizontal state. When the motor housing is lifted by the lifting device, the hanging plate is subjected to a downward force, which causes it to rotate downward. The position of the hanging plate is limited by the limiting groove. Even if rotation occurs, it will stop when the top surface of the hanging plate is in a horizontal state, thereby ensuring the lifting stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of an embodiment of a centerable special lifting device of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the utility model (the lifting ring, the lifting rod and a centering piece are not shown);

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the hanging plate in the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the centering piece in the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of an embodiment of the utility model in use.

[0029] The following are the descriptions of the reference numerals:

[0030] 1- suspension rod, 2- compression piece, 21- compression ring, 22- guide cylinder; 3- traction rope, 4- intermediate connecting piece,

[0031] 41-limiting groove; 5-centering piece, 51-locking hole, 52-second rope hole, 53-centering arc; 6-hanging plate, 61-mounting hole, 62-hinge hole, 63-first rope hole; 7-pin shaft, 8-lifting ring, 9-spring. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Refer to the attached Figure 1-5 The utility model is a centerable special sling including a sling rod 1. In order to facilitate connection with the lifting equipment, a sling ring 8 is connected to the top of the sling rod 1. A spring 9 and a compression member 2 are sleeved on the sling rod 1. The compression member 2 includes a compression ring 21 and a guide cylinder 22. The guide cylinder 22 is located at the top of the compression ring 21 and is integrally arranged with the compression ring 21. If only the compression ring 21 is arranged, its axial dimension is too thin, and it may get stuck during the up and down movement along the sling rod 1. The axial dimension is extended by the guide cylinder 22 to ensure smooth movement.

[0034] The bottom of the compression ring 21 abuts against the top of the spring 9, and an intermediate connecting piece 4 is connected to the bottom end of the suspension rod 1. For the convenience of connection, a threaded section is provided at the bottom end of the intermediate connecting piece 4, and a threaded hole is opened in the top center of the intermediate connecting piece 4. The threaded section is screwed into the threaded hole to realize the connection between the suspension rod 1 and the intermediate connecting piece 4, and the bottom end of the spring 9 is located above the top of the intermediate connecting piece 4, abuts against the top of the intermediate connecting piece 4 or is fixed on the suspension rod 1. In this embodiment, in order to simplify the structure, the bottom end of the spring 9 directly abuts against the top of the intermediate connecting piece 4.

[0035] Three hanging plates 6 are hinged on the central connecting member 4, and the three hanging plates 6 are evenly distributed along the circumferential direction of the suspension rod 1. Three connecting parts are correspondingly arranged on the middle connecting member 4, and each connecting part includes two symmetrically arranged connecting ears. The inner end of the hanging plate 6 is located between the two connecting ears, and a hinge hole 62 is opened through the inner end of the hanging plate 6 in the horizontal direction. A connecting hole corresponding to the hinge hole 62 is opened on the connecting ear. The three hanging plates 6 are respectively connected to the three connecting parts through the hinge hole 62, the connecting holes and the pin shaft 7. The tail of the pin shaft 7 abuts against the outer wall of the connecting ear on one side, and the front end of the pin shaft 7 is sleeved with a retaining spring, which abuts against the outer wall of the connecting ear on the other side. Both ends of the pin shaft 7 are limited, so that when the hanging plate 6 rotates, the pin shaft 7 will not fall out, thereby ensuring safe use.

[0036] The intermediate connecting piece 4 is provided with a limiting groove 41 on the outer wall between the two connecting ears, and the inner end of the hanging plate 6 is located in the limiting groove 41; and the upper edge height of the limiting groove 41 satisfies the following conditions: when the top surface of the inner end of the hanging plate 6 abuts against the upper edge of the limiting groove 41, the top surface of the hanging plate 6 is in a horizontal state. When the motor housing is lifted by the lifting device, the hanging plate 6 is subjected to a downward force, which causes it to rotate downward. The position of the hanging plate 6 is limited by the limiting groove 41. Even if rotation occurs, it will stop when the top surface of the hanging plate 6 is in a horizontal state, thereby ensuring the lifting stability.

[0037] A mounting hole 61 is provided through the outer end of the hanging plate 6 in the horizontal direction, a centering piece 5 is provided on the hanging plate 6, a groove is provided at the bottom of the centering piece 5, the outer end of the hanging plate 6 is located in the groove, a locking hole 51 is provided through the side wall of the centering piece 5 corresponding to the mounting hole position, the centering piece 5 is fixedly connected to the hanging plate 6 by bolts passing through the mounting hole 61 and the locking hole 51, a centering protrusion is provided on the top of the centering piece 5, the centering protrusion is provided near the inner end of the centering piece 5, and a centering arc 53 for matching with the bearing hole of the motor housing to be hoisted is provided on the outer wall of the centering protrusion near the outer end of the centering piece 5, and the curvature of the centering arc 53 is adapted to the curvature of the bearing hole. In this way, the centering piece 5 and the hanging plate 6 are detachably connected together, and different sizes of bearing holes can be adapted by replacing different centering pieces 5, thereby improving the versatility of the entire hoist.

[0038] A first rope hole 63 for connecting the traction rope 3 is opened on the hanging plate 6, and a second rope hole 52 is opened on the centering protrusion of the centering piece 5 corresponding to the first rope hole 63, so that one end of the traction rope 3 is connected to the compression ring 21, and the other end passes through the second rope hole 52 and then is connected to the hanging plate 6 through the first rope hole 63. The traction rope 3 is made of nylon, which has high strength and good toughness and is suitable for long-term use.

[0039] When using, Figure 5As shown, put the sling into the bearing hole of the motor housing to be hoisted. At this time, the hanging plate 6 is in a contracted state due to the elastic force of the spring 9. After reaching the designated position, a vertical downward force is applied to the compression member 2. At this time, the hanging plate 6 rotates downward until the centering arc 53 fits with the edge of the bearing hole. At this time, the centering of the motor housing is completed and the posture of the motor housing is controlled. Then connect the hoisting equipment to the lifting ring 8 and lift the motor housing to the designated work station. After the motor housing is placed, move the sling downward to disengage the centering arc 53 from the bearing hole. Because there is no restriction from the bearing hole, the elastic potential energy accumulated by the spring 9 is released, pushing the compression member 2 to move upward. The compression member 2 drives the hanging plate 6 to rotate upward through the traction rope 3 to complete the reset. After the reset, the sling can be taken out.

[0040] The embodiments described above are merely descriptions of the specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A special centerable lifting device, characterized in that: It comprises a suspension rod (1), a spring (9), a compression member (2), a hanging plate (6) and an intermediate connecting member (4); The spring (9) and the compression member (2) are both sleeved on the suspension rod (1), and the compression member (2) is located at the top of the spring (9) and abuts against it; The intermediate connecting member (4) is connected to the bottom end of the suspension rod (1), and the bottom end of the spring (9) is located above the top end of the intermediate connecting member (4), abutting against the top end of the intermediate connecting member (4) or fixed on the suspension rod (1); There are a plurality of hanging plates (6) which are all hinged to the middle connecting piece (4), and each hanging plate (6) is provided with a centering arc (53) for matching with the bearing hole of the motor housing to be hoisted, and the curvature of the centering arc (53) is adapted to the curvature of the bearing hole; Each hanging plate (6) is connected to the compression member (2) via a traction rope (3).

2. The centerable special lifting device according to claim 1, characterized in that: The inner end of the hanging plate (6) is hinged to the middle connecting piece (4), and the outer end is provided with a mounting hole (61) through-through in the horizontal direction. A centering piece (5) is provided on the hanging plate (6), and a groove is provided at the bottom of the centering piece (5). The outer end of the hanging plate (6) is located in the groove. A locking hole (51) is provided through-through on the side wall of the centering piece (5) corresponding to the position of the mounting hole (61). The centering piece (5) is fixedly connected to the hanging plate (6) by bolts passing through the mounting hole (61) and the locking hole (51); a centering protrusion is provided on the top of the centering piece (5), and the centering protrusion is provided close to the inner end of the centering piece (5). The centering arc (53) is provided on the outer wall of the centering protrusion close to the outer end of the centering piece (5).

3. The centerable special lifting device according to claim 2, characterized in that: There are three hanging plates (6) and they are evenly distributed along the circumferential direction of the suspension rod (1). Three connecting parts are correspondingly arranged on the middle connecting piece (4). Each connecting part includes two symmetrically arranged connecting ears. The inner end of the hanging plate (6) is located between the two connecting ears. A hinge hole (62) is opened through the inner end of the hanging plate (6) in the horizontal direction. A connecting hole corresponding to the hinge hole (62) is opened on the connecting ear. The three hanging plates (6) are respectively connected to the three connecting parts through the hinge hole (62), the connecting hole and the pin shaft (7). The tail of the pin shaft (7) abuts against the outer wall of the connecting ear on one side, and a retaining spring is sleeved on the front end. The retaining spring abuts against the outer wall of the connecting ear on the other side.

4. The centerable special lifting device according to claim 3 is characterized in that: The intermediate connecting member (4) is provided with a limiting groove (41) on the outer side wall between the two connecting ears, and the inner end of the hanging plate (6) is located in the limiting groove (41); the height of the upper edge of the limiting groove (41) satisfies the following condition: when the top surface of the inner end of the hanging plate (6) abuts against the upper edge of the limiting groove (41), the top surface of the hanging plate (6) is in a horizontal state.

5. The centerable special lifting device according to claim 4, characterized in that: The compression member (2) comprises a compression ring (21) and a guide cylinder (22); the guide cylinder (22) is located at the top of the compression ring (21) and is integrally arranged with the compression ring (21); the bottom of the compression ring (21) abuts against the top of the spring (9).

6. The centerable special lifting device according to claim 5, characterized in that: The hanging plate (6) is provided with a first rope hole (63) for connecting the traction rope (3), and a second rope hole (52) is provided on the centering protrusion of the centering piece (5) corresponding to the first rope hole (63); one end of the traction rope (3) is connected to the compression ring (21), and the other end passes through the second rope hole (52) and then is connected to the hanging plate (6) through the first rope hole (63).

7. The centerable special lifting device according to claim 1, characterized in that: The top end of the suspension rod (1) is connected with a suspension ring (8).

8. The centerable special lifting device according to claim 7, characterized in that: The traction rope (3) is a nylon traction rope.

9. The centerable special lifting device according to claim 3, characterized in that: A threaded hole is provided at the center of the top of the intermediate connecting piece (4), and a threaded section matching the threaded hole is provided at the bottom end of the suspension rod (1).

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