Anti-derailment safety trolley pulley

Abstract

The utility model relates to the technical field of trolley cable pulleys, and discloses an anti-derailment safety trolley pulley which comprises a hanger plate, two connecting plates are welded on the hanger plate, mounting plates are fixedly mounted on the connecting plates through bolts, and two pulleys are arranged on each mounting plate. A mounting hole is formed in the mounting plate, the middle of the pulley is rotationally connected with a threaded shaft rod, the threaded shaft rod penetrates through the mounting hole, and the threaded shaft rod is in threaded connection with an outer hexagonal nut; limiting grooves are formed in the outer walls of the threaded shaft rods in a clamped mode, limiting protrusions are arranged on the inner walls of the mounting holes, the limiting protrusions and the limiting grooves are connected in a matched and clamped mode, nut limiting plates are fixedly connected to the connecting plates, the nut limiting plates are clamped between the nuts of the two threaded shaft rods, and the nut limiting plates are connected with the mounting plates through bolts. The pulley can be effectively ensured to be used stably, and the pulley is prevented from being derailed due to abrasion caused by loose connection between the pulley and a frame.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolley cable pulleys, in particular to an anti-derailment safety trolley pulley. Background Art

[0002] Hoisting trolleys are a common handling device. To ensure stable power supply for the hoisting equipment during operation, these electric hoisting trolleys utilize a specialized pulley mechanism to clamp the cables and slide them along the I-rail. As the hoisting equipment moves, the cable pulleys are pulled along with the equipment, allowing the cables to be deployed or folded, ensuring stable operation of the mobile hoisting equipment.

[0003] In actual use of the existing cable pulley group for trolleys, the applicant found that: the pulley of the existing cable pulley group is fixed to the frame by screws and nuts, but in actual use, the above connection method is very likely to cause the connection between the screw shaft and the frame to loosen and rotate due to sliding vibration or other factors, thereby causing the screw shaft to wear and break, and then causing the pulley to derail and cause a safety accident. In order to solve the above problems, an anti-derailment safety trolley pulley is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a derailment-proof safety trolley pulley in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model is as follows: an anti-derailment safety trolley pulley comprises a hanging plate, two connecting plates are welded on the hanging plate, a mounting plate is fixedly installed on the connecting plate by bolts, and two pulleys are provided on each mounting plate;

[0006] A mounting hole is provided on the mounting plate, a threaded shaft is rotatably connected to the middle of the pulley, the threaded shaft passes through the mounting hole, and an external hexagonal nut is threadedly connected to the threaded shaft;

[0007] The outer wall of the threaded shaft is provided with a limiting groove, the inner wall of the mounting hole is structured with a limiting protrusion, the limiting protrusion and the limiting groove are adapted to be engaged, a nut limiting plate is fixedly connected to the connecting plate, the nut limiting plate is clamped between the nuts of the two threaded shafts, and the nut limiting plate is connected to the mounting plate by bolts.

[0008] In a preferred embodiment, the pulley is a conical structure.

[0009] In a preferred embodiment, a retaining ring is formed on one side of the pulley.

[0010] In a preferred embodiment, long bolts are passed through both sides of the connecting plate, and an arched pressure cover is inserted into the long bolts. The cable can pass through between the long bolts, the hanging plate and the arched pressure cover. The arched pressure cover presses the cable onto the hanging plate through the nut on the long bolt.

[0011] In a preferred embodiment, a rubber pad is provided between the connecting plate and the arched pressure cover, the long bolt passes through the rubber pad, and the cable is compressed and fixed between the two rubber pads.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0013] 1. In the present invention, the limiting protrusion and the limiting groove can limit the relative connection position of the threaded shaft and the mounting plate, thereby preventing the threaded shaft from rotating, thereby avoiding wear and fracture of the threaded shaft caused by rotation. At the same time, the nut limiting plate is used to lock the position of the external hexagonal nut, thereby preventing the external hexagonal nut from loosening due to rotation and causing loosening, wear and fracture of the threaded shaft. The entire structure can effectively ensure the stable use of the pulley and avoid derailment of the pulley due to wear of loose connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of the mounting plate and pulley in the present invention.

[0017] Markings in the figure: 1-hanging plate, 2-connecting plate, 3-mounting plate, 4-pulley, 5-mounting hole, 6-threaded shaft, 7-external hexagonal nut, 8-limiting groove, 9-limiting protrusion, 10-nut limiting plate, 11-retaining ring, 12-long bolt, 13-arched pressure cover, 14-rubber pad. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The following will be combined Figure 1-Figure 3An anti-derailment safety trolley pulley according to an embodiment of the present invention is described in detail.

[0020] Example:

[0021] The utility model provides an anti-derailment safety trolley pulley, Figures 1 to 3 As shown, it includes a hanging plate 1, two connecting plates 2 are welded on the hanging plate 1, and a mounting plate 3 is fixed on the connecting plate 2 by bolts, and two pulleys 4 are provided on the mounting plate 3. Long bolts 12 are passed through both sides of the connecting plate 2, and an arched pressure cover 13 is inserted into the long bolts 12. The cable can pass through the long bolts 12, the hanging plate 1 and the arched pressure cover 13, and the arched pressure cover 13 presses the cable on the hanging plate 1 through the nut on the long bolt 12. The above structure constitutes a cable pulley group for the trolley, wherein the cable is pressed and fixed on the hanging plate 1 through the arched pressure cover 13, and then the pulleys 4 on the two mounting plates 3 can be placed on the upper part of the lower wing of the I-type track, so that the hanging plate 1 structure slides on the I-type track through the pulley 4, thereby driving the cable to move and expand or fold and shrink, ensuring the stable power supply operation of the trolley lifting structure.

[0022] refer to Figures 1 to 3 As shown, two rubber pads 14 are provided between the connecting plate 2 and the arched pressure cover, the long bolts 12 pass through the rubber pads 14, and the cables are compressed and fixed between the two rubber pads 14. In this structure, the rubber pads 14 are used to protect the cables to avoid extrusion damage.

[0023] refer to Figures 1 to 3 As shown, a mounting hole 5 is opened on the mounting plate 3, and a threaded shaft 6 is rotatably connected to the middle part of the pulley 4. The threaded shaft 6 passes through the mounting hole 5, and an external hexagonal nut 7 is threadedly connected to the threaded shaft 6. In this structure, the threaded shaft 6 passes through the mounting hole 5 and is then fixed to the mounting plate 3 by the external hexagonal nut 7, thereby fixing the pulley 4 on the mounting plate 3.

[0024] It should be noted that: the outer diameters of the two sides of the above-mentioned threaded shaft 6 are one thick and one thin, the pulley 4 is rotatably mounted on the thick end, the diameter of the thick end of the pulley 4 is larger than the diameter of the mounting hole 5, the outer wall of the thin end of the threaded shaft 6 is provided with an external thread, and the thin end of the threaded shaft 6 passes through the mounting hole 5.

[0025] refer to Figures 1 to 3As shown, the outer wall of the threaded shaft 6 is provided with a limiting groove 8, and the inner wall of the mounting hole 5 is constructed with a limiting protrusion 9. The limiting protrusion 9 and the limiting groove 8 are adapted to be clamped, and a nut limiting plate 10 is fixedly connected to the connecting plate 2. The nut limiting plate 10 is clamped between the outer hexagonal nuts 7 on the two threaded shafts 6. The nut limiting plate 10 is connected to the mounting plate 3 by bolts. In this structure, the limiting protrusion 9 and the limiting groove 8 can limit the relative connection position of the threaded shaft 6 and the mounting plate 3, thereby preventing the threaded shaft 6 from rotating on its own, thereby avoiding wear and fracture of the threaded shaft 6 caused by rotation, and at the same time, the nut limiting plate 10 is used to lock the position of the outer hexagonal nut 7, thereby preventing the outer hexagonal nut 7 from loosening due to rotation and causing the threaded shaft 6 to loosen, wear and fracture. The entire structure can effectively ensure the stable use of the pulley 4 and avoid wear and tear caused by loose connection that causes derailment of the pulley 4.

[0026] It should be noted that during the installation of the above structure, a special torque wrench will be used to control the locking force of the hexagonal nut 7, and when tightening, one side of the hexagonal nut 7 on the two threaded shafts 6 will be parallel to the nut limiting plate 10, thereby ensuring that the nut limiting plate 10 can be stuck between the hexagonal nuts 7.

[0027] refer to Figures 1 to 3 As shown, the pulley 4 is a conical structure, which is convenient for turning the pulley 4. A retaining ring 11 is constructed on one side of the pulley 4, and the retaining ring 11 prevents the arched steel from contacting and rubbing with the mounting plate 3.

[0028] The implementation principle of an anti-derailment safety trolley pulley in an embodiment of the present application is as follows: when in use, the limiting protrusion 9 and the limiting groove 8 can limit the relative connection position of the threaded shaft 6 and the mounting plate 3, thereby preventing the threaded shaft 6 from rotating, thereby avoiding the threaded shaft 6 from being worn and broken due to rotation, and at the same time, the nut limiting plate 10 is used to lock the position of the external hexagonal nut 7, thereby preventing the external hexagonal nut 7 from loosening due to rotation and causing the threaded shaft 6 to loosen, wear and break. The entire structure can effectively ensure the stable use of the pulley 4 and avoid wear and tear caused by loose connection that causes derailment of the pulley 4.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An anti-derailment safety trolley pulley, comprising a hanging plate (1), characterized in that: Two connecting plates (2) are welded to the hanging plate (1), a mounting plate (3) is fixedly mounted on the connecting plate (2) by means of bolts, and two pulleys (4) are provided on each of the mounting plates (3); The mounting plate (3) is provided with a mounting hole (5), the middle portion of the pulley (4) is rotatably connected to a threaded shaft (6), the threaded shaft (6) passes through the mounting hole (5), and an external hexagonal nut (7) is threadedly connected to the threaded shaft (6); The outer wall of the threaded shaft (6) is provided with a limiting groove (8), the inner wall of the mounting hole (5) is structured with a limiting protrusion (9), the limiting protrusion (9) and the limiting groove (8) are adapted to be engaged, a nut limiting plate (10) is fixedly connected to the connecting plate (2), the nut limiting plate (10) is clamped between the outer hexagonal nuts (7) on the two threaded shafts (6), and the nut limiting plate (10) is connected to the mounting plate (3) by bolts.

2. The anti-derailment safety trolley pulley according to claim 1, wherein: The pulley (4) is a conical structure.

3. The anti-derailment safety trolley pulley according to claim 1, wherein: A retaining ring (11) is formed on one side of the pulley (4).

4. The anti-derailment safety trolley pulley according to claim 1, wherein: Long bolts (12) are passed through both sides of the connecting plate (2), and an arched pressure cover (13) is inserted into the long bolts (12). The cable can pass through between the long bolts (12), the hanging plate (1) and the arched pressure cover (13), and the arched pressure cover (13) presses the cable onto the hanging plate (1) through the nut on the long bolts (12).

5. The anti-derailment safety trolley pulley according to claim 4, characterized in that: Two rubber pads (14) are provided between the connecting plate (2) and the arched pressure cover (13); the long bolt (12) passes through the rubber pads (14); and the cable is compressed and fixed between the two rubber pads (14).

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