Anti-falling electromagnet pin shaft assembly of bridge crane

Abstract

The utility model discloses an anti-falling electromagnet pin shaft assembly of a bridge crane, belongs to the technical field of bridge cranes, and solves the problem that an existing electromagnet pin shaft is poor in anti-falling effect. The connecting pin shaft comprises a connecting pin shaft, one end of the connecting pin shaft is provided with an outer hexagon head, the other end of the connecting pin shaft is provided with a linear fracture groove formed in the axial direction from the end face of the connecting pin shaft, the other end of the connecting pin shaft is provided with an external thread, the external thread is in threaded connection with a locking nut, a threaded hole is formed in the connecting pin shaft, and the threaded hole is connected with the locking nut. A containing cavity communicated with one end of the threaded hole is formed in the outer hexagon head, a conical groove communicated with the threaded hole is formed in the other end of the threaded hole, and the conical groove is located in the connecting pin shaft corresponding to the outer threads. And an expanding assembly capable of expanding the other end of the connecting pin shaft is in threaded connection with the interior of the threaded hole in the connecting pin shaft. According to the electromagnet pin shaft assembly, the connecting pin shaft can be effectively prevented from falling off, and the safety of production operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge cranes, and more specifically, to an anti-dropping electromagnet pin shaft assembly for bridge cranes. Background Art

[0002] Existing bridge cranes generally fix the electromagnet on the crane suspension beam through a chain. The lifting plate of the electromagnet is connected to the chain by a connecting pin, and the end of the connecting pin is fixed with a cotter pin to prevent the connecting pin from falling off.

[0003] However, during the lifting process, the electromagnet swings and when the load is lifted or lowered, the cotter pin of the connecting pin shaft between the electromagnet and the chain will be affected by the lateral impact force, causing the cotter pin to break, resulting in the electromagnet connecting pin shaft falling off during the lifting process, and further causing safety accidents such as the load falling from a high altitude. This poses a major safety hazard and seriously affects the safety of lifting.

[0004] Therefore, it is urgent to design a novel anti-falling electromagnet pin shaft assembly for bridge crane to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an anti-falling electromagnet pin shaft assembly for a bridge crane in view of the above-mentioned deficiencies in the prior art, which can effectively prevent the connecting pin shaft from falling off, ensure the safety of production operations, and facilitate disassembly, assembly and maintenance.

[0006] The technical solution of the utility model is as follows: an anti-falling electromagnet pin shaft assembly for a bridge crane comprises a connecting pin shaft, one end of the connecting pin shaft is provided with an external hexagonal head, the other end is provided with a straight-line fracture groove opened from its end face along the axial direction, and the other end of the connecting pin shaft is provided with an external thread, a locking nut is threadedly connected to the external thread, a threaded hole is opened in the connecting pin shaft, the external hexagonal head is provided with a accommodating cavity connected to one end of the threaded hole, the other end of the threaded hole is provided with a tapered groove connected thereto, the fracture groove extends to the threaded hole above the tapered groove, and the tapered groove is located in the connecting pin shaft corresponding to the external thread; the threaded hole in the connecting pin shaft is threadedly connected with an expansion component that can expand the other end of the connecting pin shaft.

[0007] As a further improvement, the expansion assembly includes a hexagon socket bolt, a push rod is provided at the bottom of the hexagon socket bolt, a ball is provided at the bottom of the push rod, the diameter of the push rod is smaller than the diameter of the ball and the hexagon socket bolt screw, and the diameter of the ball is smaller than the diameter of the hexagon socket bolt screw, and the diameter of the accommodating cavity is larger than the diameter of the hexagon socket bolt nut.

[0008] Furthermore, the interference fit insertion in the external hexagonal head above the accommodating cavity is blocked.

[0009] Furthermore, a circular hole is provided on the connecting pin shaft corresponding to the bottom of the fracture groove, and the circular hole is communicated with the fracture groove.

[0010] Furthermore, a recessed groove is radially provided on the outer wall of the connecting pin shaft corresponding to the circular hole.

[0011] Furthermore, a compression nut is threadedly connected to the external thread on the outer side of the locking nut.

[0012] Furthermore, the pin shaft assembly also includes a protective cover, which covers the outer periphery of the locking nut and the compression nut, and the protective cover is detachably connected to the lifting plate of the electromagnet during installation.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The electromagnet pin shaft assembly of the utility model is provided with an expansion assembly in a hollow connecting pin shaft. During installation, the connecting pin shaft is inserted between the lifting plate and the chain of the electromagnet, and then the locking nut is screwed on. One end of the connecting pin shaft is limited by the external hexagonal head, and the other end of the connecting pin shaft is limited by the locking nut, so that the connecting pin shaft can be prevented from falling off. At the same time, by screwing the expansion assembly in the connecting pin shaft, the threaded connection force between the internal hexagonal bolt and the threaded hole is utilized to push the ball to squeeze the tapered groove, so that the other end of the connecting pin shaft expands, thereby increasing the friction between the locking nut and the other end of the connecting pin shaft, so that the locking nut cannot rotate, which can effectively prevent the connecting pin shaft from falling off, ensure the safety of production operations, and facilitate disassembly and maintenance.

[0016] 2. The electromagnet pin shaft assembly of the utility model can prevent impurities from entering the accommodating cavity by arranging a plug on the external hexagonal head; at the same time, by arranging a protective cover on the periphery of the locking nut and the compression nut, impurities can be prevented from entering the connection between the two nuts and the connecting pin shaft, which facilitates the subsequent disassembly of the two nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the connecting pin shaft in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the expansion component in the utility model;

[0020] Figure 4 It is a schematic diagram of the structure when the utility model is applied;

[0021] Figure 5 It is an enlarged schematic diagram of the structure when the connecting pin shaft is installed in the utility model.

[0022] Among them: 1-connecting pin, 2-external hexagonal head, 3-fracture groove, 4-external thread, 5-locking nut, 6-threaded hole, 7-accommodating chamber, 8-conical groove, 9-expansion component, 10-blocking, 11-round hole, 12-sinking groove, 13-pressing nut, 14-protective cover, 15-electromagnet, 16-lifting plate, 17-chain, 91-hexagon socket bolt, 92-thrust rod, 93-ball. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See also Figure 1-5 The utility model discloses an anti-falling electromagnet pin shaft assembly for a bridge crane, comprising a connecting pin shaft 1, an external hexagonal head 2 is provided at one end of the connecting pin shaft 1, which is convenient for rotating the connecting pin shaft 1, and the other end of the connecting pin shaft 1 is provided with a straight-line fracture groove 3 opened from its end face in the axial direction, that is, the other end of the connecting pin shaft 1 is divided into two symmetrical semicircles by the fracture groove 3 to ensure that the other end of the connecting pin shaft 1 can be expanded, and the other end of the connecting pin shaft 1 is provided with an external thread 4, on which a locking nut 5 is threadedly connected, a threaded hole 6 is opened in the connecting pin shaft 1, a receiving cavity 7 connected to one end of the threaded hole 6 is provided in the external hexagonal head 2, and a tapered groove 8 connected thereto is provided at the other end of the threaded hole 6, the fracture groove 3 extends to the threaded hole 6 above the tapered groove 8, and the tapered groove 8 is located in the connecting pin shaft 1 corresponding to the external thread 4; an expansion component 9 that can expand the other end of the connecting pin shaft 1 is threadedly connected to the threaded hole 6 in the connecting pin shaft 1. Specifically, the expansion assembly 9 includes a hexagon socket bolt 91, wherein a push rod 92 is provided at the bottom of the hexagon socket bolt 91, and a ball 93 is provided at the bottom of the push rod 92. The diameter of the push rod 92 is smaller than the diameter of the ball 93 and the screw rod of the hexagon socket bolt 91, and the diameter of the ball 93 is smaller than the diameter of the screw rod of the hexagon socket bolt 91, ensuring that the ball 93 can pass through the threaded hole 6, and the diameter of the accommodating cavity 7 is larger than the diameter of the nut of the hexagon socket bolt 91, ensuring that the hexagon socket bolt 91 can be installed in the connecting pin shaft 1.

[0025] The electromagnet pin shaft assembly of the utility model is provided with an expansion component 9 in a hollow connecting pin shaft 1. During installation, the connecting pin shaft 1 is inserted between the lifting plate 16 and the chain 17 of the electromagnet 15, and then the locking nut 5 is screwed on. The outer hexagonal head 2 is used to limit one end of the connecting pin shaft 1, and the locking nut 5 is used to limit the other end of the connecting pin shaft 1, so that the connecting pin shaft 1 can be prevented from falling off. At the same time, by screwing the expansion component 9 in the connecting pin shaft 1, the threaded connection force between the hexagonal bolt 91 and the threaded hole 6 is used to push the ball 93 to squeeze the tapered groove 8, so that the other end of the connecting pin shaft 1 is expanded, thereby increasing the friction between the locking nut 5 and the other end of the connecting pin shaft 1, so that the locking nut 5 cannot rotate, which can effectively prevent the connecting pin shaft from falling off, ensure the safety of production operations, and facilitate disassembly and maintenance.

[0026] Preferably, a plug 10 is inserted in an interference fit in the outer hexagonal head 2 above the accommodating cavity 7 to prevent impurities from entering the accommodating cavity 7 .

[0027] Preferably, a circular hole 11 is provided on the connecting pin shaft 1 corresponding to the bottom of the fracture groove 3, and the circular hole 11 is connected to the fracture groove 3, so that the other end of the connecting pin shaft 1 is more easily expanded and restored. Furthermore, a recessed groove 12 is radially provided on the outer wall of the connecting pin shaft 1 corresponding to the circular hole 11, and the thickness of the part is reduced, so that the other end of the connecting pin shaft 1 is more easily expanded and restored.

[0028] Preferably, a compression nut 13 is threadedly connected to the external thread 4 on the outer side of the locking nut 5, and the friction between the locking nut 5 and the compression nut 13 is used to improve the stability of the two nuts, thereby further preventing them from loosening.

[0029] Preferably, the pin assembly further includes a protective cover 14, which is coated on the periphery of the locking nut 5 and the compression nut 13, and the protective cover 14 is detachably connected to the lifting plate 16 of the electromagnet 15 during installation. Specifically, the protective cover 14 can be installed by screws or glue bonding to achieve the purpose of convenient disassembly and assembly. By arranging the protective cover 14 on the periphery of the locking nut 5 and the compression nut 13, impurities can be prevented from entering the connection between the two nuts and the connecting pin, which facilitates the subsequent disassembly of the two nuts.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A bridge crane anti-dropping electromagnet pin assembly, comprising a connecting pin (1), characterized in that: One end of the connecting pin shaft (1) is provided with an external hexagonal head (2), and the other end is provided with a straight-shaped fracture groove (3) opened from its end face in the axial direction, and the other end of the connecting pin shaft (1) is provided with an external thread (4), and a locking nut (5) is threadedly connected to the external thread (4). A threaded hole (6) is opened in the connecting pin shaft (1), and a receiving cavity (7) connected to one end of the threaded hole (6) is provided in the external hexagonal head (2). The other end of the threaded hole (6) is provided with a tapered groove (8) connected thereto, and the fracture groove (3) extends into the threaded hole (6) above the tapered groove (8), and the tapered groove (8) is located in the connecting pin shaft (1) corresponding to the external thread (4); the threaded hole (6) in the connecting pin shaft (1) is threadedly connected to an expansion component (9) that can expand the other end of the connecting pin shaft (1).

2. The anti-dropping electromagnet pin assembly for a bridge crane according to claim 1, characterized in that: The expansion assembly (9) includes a hexagon socket bolt (91), a push rod (92) is provided at the bottom of the hexagon socket bolt (91), a ball (93) is provided at the bottom of the push rod (92), the diameter of the push rod (92) is smaller than the diameter of the ball (93) and the screw rod of the hexagon socket bolt (91), and the diameter of the ball (93) is smaller than the diameter of the screw rod of the hexagon socket bolt (91), and the diameter of the accommodating cavity (7) is larger than the diameter of the nut of the hexagon socket bolt (91).

3. The anti-dropping electromagnet pin assembly for a bridge crane according to claim 2, characterized in that: The external hexagonal head (2) above the accommodating cavity (7) is plugged with an interference fit and provided with a plug (10).

4. The anti-dropping electromagnet pin assembly for a bridge crane according to claim 1, characterized in that: A circular hole (11) is provided on the connecting pin shaft (1) corresponding to the bottom of the fracture groove (3), and the circular hole (11) is connected to the fracture groove (3).

5. The anti-dropping electromagnet pin assembly for a bridge crane according to claim 4, characterized in that: A recessed groove (12) is radially provided on the outer wall of the connecting pin shaft (1) corresponding to the circular hole (11).

6. The anti-dropping electromagnet pin assembly for a bridge crane according to any one of claims 1 to 5, characterized in that: A compression nut (13) is also threadedly connected to the external thread (4) on the outer side of the locking nut (5).

7. The anti-dropping electromagnet pin assembly for a bridge crane according to claim 6, characterized in that: The pin shaft assembly also includes a protective cover (14), which covers the outer periphery of the locking nut (5) and the compression nut (13), and the protective cover (14) is detachably connected to the lifting plate (16) of the electromagnet (15) during installation.

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