Novel all-dimensional top-rushing-prevention limiting device

Abstract

The invention discloses a novel all-dimensional anti-top-rushing limiting device which comprises a fixed seat and a mounting seat fixedly connected to the side face of the fixed seat, a rotatable rotating seat is mounted on the mounting seat, and a limiting switch is mounted on the mounting seat and corresponds to the position of the rotating seat. And a driving rotating rod for driving the rotating seat to rotate is mounted on the rotating seat. The limiting device is fixed to a special position below an outer cover of a winding drum of the electric hoist, when the lifting hook ascends to the upper limit position, under the condition that the fire cut-off limiting device loses efficacy, the lifting hook continues to ascend upwards, the lifting hook touches a driving rotating rod extending outwards from the mechanical anti-top-rushing limiting device, and the lifting hook is driven to rotate. When the lifting device is lifted, the rotating rod is driven to be immediately separated from the switch at the bottom of the limiting switch, so that instant power failure is achieved, the lifting motor stops working, the risk that the lifting hook rushes to the top is prevented, and a second protection barrier can be provided for the lifting device.

Description

Technical Field

[0001] The invention relates to the technical field of electric hoists, and in particular to a novel all-round anti-top-impact limiting device. Background Art

[0002] Electric hoist is a special lifting equipment, installed on the overhead crane and gantry crane. Electric hoist has the characteristics of small size, light weight, simple operation and convenient use. It is used in industrial and mining enterprises, warehouses, docks and other places. The electric hoist has a compact structure, and the electric hoist with the motor axis perpendicular to the drum axis adopts a worm gear transmission device. Its disadvantages are: large length and width, large size, bulky structure, low mechanical efficiency, difficult processing, etc. The hydraulic system is double controlled, and the overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department adopts low voltage control to increase the safety of the control system. The electric hoist lifting limit device in the prior art generally adopts a fire-breaking limit device (electrical) and a weighing-type limit device fixed on the wire rope to complete the upper and lower limit work of the hook. However, in the case of failure of the fire-breaking limit device, it cannot provide good protection for the electric hoist. Summary of the invention

[0003] The purpose of the present invention is to provide a new all-round anti-top impact limit device, which is fixed at a special position under the outer cover of the electric hoist drum. When the hook rises to the upper limit position and the fire-off limit device fails, the hook continues to rise upward and hits the driving rotating rod extending outward from the mechanical anti-top impact limit device. The driving rotating rod immediately disengages from the switch at the bottom of the limit switch, thereby achieving an instant power outage and stopping the lifting motor from working, thereby preventing the danger of the hook hitting the top. Therefore, it can serve as a second protective barrier for the lifting device.

[0004] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0005] A novel all-round anti-top limit device, comprising:

[0006] A fixed seat and a mounting seat fixedly connected to the side of the fixed seat, a rotatable rotating seat is mounted on the mounting seat, a limit switch is mounted on the mounting seat and at a position corresponding to the rotating seat, and a driving rotating rod for driving the rotating seat to rotate is mounted on the rotating seat.

[0007] In the above-mentioned novel all-round anti-top impact limiting device, fixing holes for installing the fixing seat are opened at the four corners of the fixing seat, and the first hexagon socket screws for fixing the fixing seat are installed on the fixing holes.

[0008] In the above-mentioned novel all-round anti-top impact limiting device, the first hexagon socket screw is sleeved with a first elastic washer.

[0009] In the above-mentioned novel all-round anti-top impact limit device, the mounting seat comprises a base with a hollow design, and the two sides of the base are respectively integrally designed with a first side panel and a second side panel.

[0010] The above-mentioned new all-round anti-top impact limit device, wherein the rotating seat includes a rotating plate, both sides of the rotating plate are integrally formed with connecting ears, a first connecting hole is opened on the connecting ear, and the first side panel and the second side panel are both provided with a second connecting hole used in conjunction with the first connecting hole.

[0011] In the above-mentioned novel all-round anti-top impact limit device, the first connecting hole and the second connecting hole are rotatably connected via a connecting shaft, and a cotter pin for positioning the connecting shaft is provided on the connecting shaft.

[0012] In the above-mentioned novel all-round anti-top impact limit device, a first mounting hole for mounting the limit switch is opened on the limit switch, and a second mounting hole matching the first mounting hole is opened on the side of the first side panel.

[0013] In the above-mentioned novel all-round anti-top impact limit device, the first mounting hole and the second mounting hole are fixedly connected by a second hexagon socket screw, and a hexagonal nut is threadedly connected to the second hexagon socket screw.

[0014] The above-mentioned novel all-round anti-top impact limiting device, wherein a second elastic washer is arranged on the second hexagon socket screw and at a position corresponding to the hexagon nut.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] The present invention fixes the limit device of the present invention at a special position under the outer cover of the electric hoist drum. When the hook rises to the upper limit position and the fire-off limit device fails, when the hook continues to rise upward, the hook hits the driving rotating rod extending outward from the mechanical anti-top-impact limit device, and the driving rotating rod immediately disengages from the switch at the bottom of the limit switch, thereby achieving an instant power outage and stopping the lifting motor from working, thereby preventing the danger of the hook hitting the top, and thus serving as a second protective barrier for the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a novel all-round anti-top impact limiter device of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the novel all-round anti-top impact limiter device of the present invention from another perspective;

[0020] Figure 3 It is a schematic diagram of the structure of the fixing seat in the novel all-round anti-top impact limiting device of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the first hexagon socket screw in the novel all-round anti-top impact limiting device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a mounting seat in the novel all-round anti-top impact limiting device of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the rotating seat in the novel all-round anti-top impact limiting device of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the connecting shaft in the novel all-round anti-top impact limiting device of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the limit switch in the novel all-round anti-top impact limit device of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the second hexagon socket screw in the novel all-round anti-top impact limiting device of the present invention;

[0027] Fig.10 It is a schematic structural diagram of a driving rotating rod in the novel all-round anti-top impact limiting device of the present invention;

[0028] Fig.11 The present invention is a schematic structural diagram of a novel all-round anti-top-impact limiting device installed on an electric hoist.

[0029] Description of Figure Numbers:

[0030] 1. Fixed seat; 2. Mounting seat; 3. Rotating seat; 4. Limit switch; 5. Driving rod;

[0031] 101, fixing hole; 1011, first hexagon socket screw;

[0032] 102. a first elastic washer;

[0033] 201, base; 202, first side panel; 203, second side panel;

[0034] 301, rotating plate; 302, connecting ear; 3021, first connecting hole; 3022, second connecting hole;

[0035] 3023, connecting shaft; 3024, cotter pin;

[0036] 401, first mounting hole; 402, second mounting hole; 403, second hexagon socket screw; 404, hexagon nut; 4041, second elastic washer. DETAILED DESCRIPTION

[0037] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0038] Please refer to Figures 1 to 11 As shown, an embodiment of the present invention provides a novel all-round anti-top limit device, comprising: a fixed seat 1 and a mounting seat 2 fixedly connected to a side of the fixed seat 1, a rotatable rotating seat 3 is mounted on the mounting seat 2, a limit switch 4 is mounted on the mounting seat 2 and at a position corresponding to the rotating seat 3, and a driving rotating rod 5 for driving the rotating seat 3 to rotate is mounted on the rotating seat 3;

[0039] By adopting the above technical scheme, the limit device of the present invention is fixed at a special position under the outer cover of the electric hoist drum. When the hook rises to the upper limit position and the fire-off limit device fails, the hook continues to rise upward and hits the driving rotating rod 5 extending outward from the mechanical anti-top-impact limit device. The driving rotating rod 5 immediately disengages from the switch at the bottom of the limit switch 4, thereby achieving an instant power outage and stopping the lifting motor from working, thereby preventing the danger of the hook hitting the top, thereby serving as a second protective barrier for the lifting device.

[0040] Please refer to Figures 1 to 11 As shown, fixing holes 101 for installing the fixing base 1 are provided at the four corners of the fixing base 1, and first hexagon socket screws 1011 for fixing the fixing base 1 are installed on the fixing holes 101. The first hexagon socket screws 1011 are provided to facilitate fixing the fixing base 1 on the electric hoist.

[0041] Please refer to Figures 1 to 11 As shown, a first elastic washer 102 is sleeved on the first hexagon socket screw 1011 , and the first elastic washer 102 is provided to increase the stability of the fixing base 1 when installed on the electric hoist.

[0042] Please refer to Figures 1 to 11 As shown, the mounting base 2 includes a hollow base 201, and the two sides of the base 201 are respectively integrally designed with a first side panel 202 and a second side panel 203. The hollow base 201 reduces the overall weight of the limiting device of the present invention and reduces the production cost.

[0043] Please refer to Figures 1 to 11 As shown, the rotating seat 3 includes a rotating plate 301, and connecting ears 302 are integrally formed on both sides of the rotating plate 301. A first connecting hole 3021 is provided on the connecting ear 302, and a second connecting hole 3022 is provided on the first side panel 202 and the second side panel 203 to cooperate with the first connecting hole 3021. The first connecting hole 3021 and the second connecting hole 3022 are rotatably connected via a connecting shaft 3023, and a cotter pin 3024 for positioning the connecting shaft 3023 is provided on the connecting shaft 3023. The rotating seat 3 is rotatably installed on the mounting seat 2 via the connecting shaft 3023, so that when the hook of the electric hoist knocks down the driving rotating rod 5, the rotating seat 3 can be conveniently rotated by driving the rotating rod 5.

[0044] Please refer to Figures 1 to 11 As shown, a first mounting hole 401 for mounting the limit switch 4 is provided on the limit switch 4, and a second mounting hole 402 matching the first mounting hole 401 is provided on the side of the first side panel 202. The first mounting hole 401 and the second mounting hole 402 are fixedly connected by a second hexagon socket screw 403, and a hexagon nut 404 is threadedly connected to the second hexagon socket screw 403. By arranging the second hexagon socket screw 403 and the hexagon nut 404, it is convenient to fix the limit switch 4 on the rotating seat 3.

[0045] Please refer to Figures 1 to 11 As shown, a second elastic washer 4041 is provided on the second hexagon socket screw 403 and at a position corresponding to the hexagon nut 404. The second elastic washer 4041 is provided to increase the stability of the limit switch 4 installed on the rotating seat 3;

[0046] All components of the position limiting device of the present invention are subjected to zinc plating passivation treatment, thereby increasing the service life of the position limiting device of the present invention.

[0047] The working principle of the present invention is: first, the limit device of the present invention is fixed under the outer cover of the electric hoist drum and corresponding to the position of the wire rope through the first hexagon socket screw 1011, and the wire rope is passed through the driving rotating rod 5. When the hook rises to the upper limit position and the fire-off limit device fails, when the hook continues to rise upward, the hook hits the driving rotating rod 5 extending outward from the mechanical anti-top-impact limit device, and the driving rotating rod 5 immediately disengages from the switch at the bottom of the limit switch 4, thereby achieving an instant power outage and stopping the lifting motor from working, thereby preventing the danger of the hook hitting the top, and thus serving as a second protective barrier for the lifting device.

[0048] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A novel all-round anti-top limit device, comprising a fixing seat (1) and a mounting seat (2) fixedly connected to the side of the fixing seat (1), characterized in that: A rotatable rotating seat (3) is mounted on the mounting seat (2), a limit switch (4) is mounted on the mounting seat (2) at a position corresponding to the rotating seat (3), and a driving rotating rod (5) for driving the rotating seat (3) to rotate is mounted on the rotating seat (3).

2. A novel all-round anti-top limit device according to claim 1, characterized in that: Fixing holes (101) for mounting the fixing seat (1) are provided at the four corners of the fixing seat (1), and first hexagon socket screws (1011) for fixing the fixing seat (1) are installed on the fixing holes (101).

3. A novel all-round anti-top limit device according to claim 2, characterized in that: The first hexagon socket screw (1011) is sleeved with a first elastic washer (102).

4. A novel all-round anti-top limit device according to claim 3, characterized in that: The mounting seat (2) comprises a base (201) with a hollow design, and two sides of the base (201) are respectively integrally designed with a first side panel (202) and a second side panel (203).

5. A novel all-round anti-top limit device according to claim 4, characterized in that: The rotating seat (3) comprises a rotating plate (301), both sides of the rotating plate (301) are integrally formed with connecting ears (302), the connecting ears (302) are provided with a first connecting hole (3021), and the first side panel (202) and the second side panel (203) are both provided with a second connecting hole (3022) for use with the first connecting hole (3021).

6. A novel all-round anti-top limit device according to claim 5, characterized in that: The first connecting hole (3021) and the second connecting hole (3022) are rotatably connected via a connecting shaft (3023), and a cotter pin (3024) for positioning the connecting shaft (3023) is provided on the connecting shaft (3023).

7. A novel all-round anti-top limit device according to claim 6, characterized in that: The limit switch (4) is provided with a first mounting hole (401) for mounting the limit switch (4), and the side surface of the first side panel (202) is provided with a second mounting hole (402) matching the first mounting hole (401).

8. The novel all-round anti-top limit device according to claim 7 is characterized in that: The first mounting hole (401) and the second mounting hole (402) are fixedly connected via a second hexagon socket screw (403), and a hexagon nut (404) is threadedly connected to the second hexagon socket screw (403).

9. The novel all-round anti-top limit device according to claim 8 is characterized in that: A second elastic washer (4041) is arranged on the second hexagon socket screw (403) and at a position corresponding to the hexagon nut (404).

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