Height limiting structure for electric winch crane

Abstract

The utility model relates to the technical field of electric hoisting cranes, in particular to a height limiting structure for an electric hoisting crane, which comprises a hoisting steel wire rope, a pulley is mounted on the outer wall of the hoisting steel wire rope, a rotating rod is mounted on the inner wall of the pulley, and the outer wall of the rotating rod is rotatably connected with a mounting seat. A first screw rod and a second screw rod are mounted on the surface of one side of the mounting seat, and a contact type height limiter is mounted on the inner wall of the mounting seat. According to the improved height limiting structure, the design facilitating limiting is adopted, movement of the limiting plate is monitored in real time through the visual sensor, when the movement distance of the limiting plate reaches a preset value, the visual sensor can transmit a signal to the contact type height limiting stopper, the contact type height limiting stopper can cut off the winding action in time, and the winding speed is increased. According to the contact type height limiting stopper, safety accidents are prevented, the design convenient to disassemble and assemble is adopted, the contact type height limiting stopper can be quickly disassembled, and the contact type height limiting stopper can be conveniently maintained.

Description

Technical Field

[0001] This utility model relates to the field of electric winch crane technology, specifically a height limiting structure for electric winch cranes. Background Technology

[0002] Electric winch cranes are widely used in construction, water conservancy projects, forestry, mining, docks, and other industries for material lifting or horizontal dragging due to their simple operation, large rope capacity, and convenient relocation. Furthermore, they can also serve as supporting equipment for modern electrically controlled automated production lines, suitable for civil engineering and installation projects in construction and installation companies, mining areas, and factories.

[0003] In electric winch cranes, small electric winch cranes, due to their low lifting height, allow operators to visually observe changes in the hook's lifting height. Therefore, most of them are not equipped with height limiters, posing a certain safety hazard of over-winding. Traditional suspended height limiters use a chain or wire to suspend a weight, and the winch action is interrupted by controlling the height limiter when the hook lifts the weight. This method wastes some of the crane's lifting height because the weight suspension requires a certain length.

[0004] In the process of developing this utility model, the inventors discovered the following problems with the existing technology: 1. The existing height limiting structure uses a chain or steel wire to suspend a weight. When the hook lifts the weight, the height limiter is controlled to cut off the hoisting action. This method wastes a certain amount of the crane's lifting height because the weight suspension requires a certain length. 2. The existing height limiting structure is relatively simple. When the contact-type height limiter is damaged, it is inconvenient to quickly disassemble and assemble the contact-type height limiter, which affects the use of the device. Utility Model Content

[0005] The purpose of this utility model is to provide a height limiting structure for electric winch cranes, to solve the problems of inconvenience in limiting and disassembling the height limiting structures mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a height limiting structure for electric winch cranes, including a lifting wire rope, a pulley installed on the outer wall of the lifting wire rope, a rotating rod installed on the inner wall of the pulley, a mounting base rotatably connected to the outer wall of the rotating rod, a first screw and a second screw installed on one side surface of the mounting base, a contact-type height limiter installed on the inner wall of the mounting base, a fixing plate installed on the bottom surface of the contact-type height limiter, a sliding rod installed on one side surface of the bottom of the fixing plate, and a limiting plate installed on the outer wall of the sliding rod.

[0006] More preferably, the pulleys are provided in total, with three in total.

[0007] More preferably, both the contact-type height limiter and the mounting base have a first threaded hole on one side surface, the internal dimensions of which are consistent with the external dimensions of the first screw.

[0008] More preferably, both the contact-type height limiter and the mounting base have a second threaded hole on one side surface, the internal dimensions of which are consistent with the external dimensions of the second screw.

[0009] More preferably, the outer walls of the first screw and the second screw are provided with a plurality of protrusions of the same size and structure, and the protrusions are symmetrically distributed about the central axis of the first screw and the second screw, respectively.

[0010] More preferably, the limiting plate and the slide rod constitute a sliding mechanism.

[0011] More preferably, a vision sensor is provided on one side surface of the fixing plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention employs a design that facilitates limiting the movement of the hoisting wire rope. One end of the hoisting wire rope is connected to the electric winch crane, and the other end is connected to the hook. When the hook lifts the object to its maximum height, it will drag the limiting plate to continue moving upwards. The limiting plate slides on the outer wall of the slide bar. The movement of the limiting plate is monitored in real time by a vision sensor. When the moving distance of the limiting plate reaches a preset value, the vision sensor can transmit a signal to the contact-type height limiter. The contact-type height limiter has the characteristics of short stroke and sensitive triggering, which can cut off the hoisting action in time.

[0014] This utility model adopts a design that facilitates disassembly and assembly. First, the contact-type height limiter and the mounting base are connected. By rotating the first screw, the first screw is inserted into the first threaded hole, which can quickly fix one end of the contact-type height limiter. Then, the second screw is rotated and inserted into the second threaded hole, which can quickly fix the other end of the contact-type height limiter. Conversely, the contact-type height limiter can be quickly disassembled, which is convenient for maintenance. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0018] Figure 4This is a schematic diagram of the right-side structure of this utility model.

[0019] In the diagram: 1. Lifting wire rope; 2. Pulley; 3. Rotating rod; 4. Mounting base; 5. First screw; 6. Second screw; 7. Contact-type height limiter; 8. Fixing plate; 9. Sliding rod; 10. Limiting plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a height limiting structure for an electric winch crane, including a lifting wire rope 1, a pulley 2 installed on the outer wall of the lifting wire rope 1, a rotating rod 3 installed on the inner wall of the pulley 2, a mounting base 4 rotatably connected to the outer wall of the rotating rod 3, a first screw 5 and a second screw 6 installed on one side surface of the mounting base 4, a contact-type height limiter 7 installed on the inner wall of the mounting base 4, a fixing plate 8 installed on the bottom surface of the contact-type height limiter 7, a sliding rod 9 installed on one side surface of the bottom of the fixing plate 8, and a limiting plate 10 installed on the outer wall of the sliding rod 9.

[0022] In this embodiment, as Figure 1 As shown, there are three pulleys 2 in total; the pulley group is formed by multiple sliders 2. The pulley group can fix the fulcrum, prevent rope tangling, change the friction of the pulley group, change the lifting distance of the crane, and transfer power from the power source to the load.

[0023] In this embodiment, as Figure 2 As shown, both the contact-type height limiter 7 and the mounting base 4 have a first threaded hole on one side surface, the internal dimensions of which are consistent with the external dimensions of the first screw 5. This design facilitates the connection between the contact-type height limiter 7 and the mounting base 4. By rotating the first screw 5, the first screw 5 can be inserted into the first threaded hole, and one end of the contact-type height limiter 7 can be quickly fixed.

[0024] In this embodiment, as Figure 2As shown, both the contact-type height limiter 7 and the mounting base 4 have a second threaded hole on one side surface, the internal dimensions of which are consistent with the external dimensions of the second screw 6. This design allows the contact-type height limiter 7 and the mounting base 4 to be aligned, and the second screw 6 can be rotated and inserted into the second threaded hole to quickly fix the other end of the contact-type height limiter 7.

[0025] In this embodiment, as Figure 2 As shown, the outer walls of the first screw 5 and the second screw 6 are provided with several protrusions of the same size and structure, and the protrusions are symmetrically distributed about the central axis of the first screw 5 and the second screw 6, respectively. This design can effectively improve the friction between the hand and the first screw 5 and the second screw 6, making it easier for the user to assemble and disassemble the first screw 5 and the second screw 6.

[0026] In this embodiment, as Figure 3 As shown, the limiting plate 10 and the slide bar 9 constitute a sliding mechanism; with this design, when the hook head is raised to the maximum height, it will drag the limiting plate 10 to continue to move upward, and the limiting plate 10 can slide on the outer wall of the slide bar 9.

[0027] In this embodiment, as Figure 4 As shown, a vision sensor is provided on one side surface of the fixed plate 8. With this design, the movement distance of the limit plate 10 can be monitored in real time by the vision sensor. When the distance of the limit plate 10 reaches the preset value, the vision sensor can transmit a signal to the contact-type height limiter 7. The contact-type height limiter 7 has the characteristics of short stroke and sensitive triggering, which can cut off the hoisting action in time.

[0028] The usage and advantages of this utility model: This height limiting structure for electric winch cranes operates as follows:

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, firstly, the contact-type height limiter 7 and the mounting base 4 are aligned. By rotating the first screw 5, the first screw 5 is inserted into the first threaded hole, which can quickly fix one end of the contact-type height limiter 7. Then, the second screw 6 is rotated and inserted into the second threaded hole, which can quickly fix the other end of the contact-type height limiter 7. One end of the lifting wire rope 1 is connected to the electric winch crane, and the other end of the lifting wire rope 1 is connected to the hook. When the hook lifts the item to the maximum height, it will drag the limit plate 10 to continue to move upward. The limit plate 10 slides on the outer wall of the slide bar 9. The movement of the limit plate 10 is monitored in real time by a vision sensor. When the distance of the limit plate 10 reaches the preset value, the vision sensor can transmit a signal to the contact-type height limiter 7. The contact-type height limiter 7 has the characteristics of short stroke and sensitive triggering, which can cut off the winch action in time.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A height limiting structure for an electric winch crane, comprising a hoisting wire rope (1), characterized in that: The outer wall of the lifting wire rope (1) is equipped with a pulley (2), the inner wall of the pulley (2) is equipped with a rotating rod (3), the outer wall of the rotating rod (3) is rotatably connected to a mounting base (4), a first screw (5) and a second screw (6) are installed on one side surface of the mounting base (4), a contact-type height limiter (7) is installed on the inner wall of the mounting base (4), a fixing plate (8) is installed on the bottom surface of the contact-type height limiter (7), a sliding rod (9) is installed on one side surface of the bottom of the fixing plate (8), and a limit plate (10) is installed on the outer wall of the sliding rod (9).

2. The height limiting structure for an electric winch crane according to claim 1, characterized in that: There are three pulleys (2).

3. A height limiting structure for an electric winch crane according to claim 1, characterized in that: The contact-type height limiter (7) and the mounting base (4) both have a first threaded hole on one side surface, the internal size structure of which is consistent with the external size structure of the first screw (5).

4. A height limiting structure for an electric winch crane according to claim 1, characterized in that: The contact-type height limiter (7) and the mounting base (4) both have a second threaded hole on one side surface, the internal size structure of which is consistent with the external size structure of the second screw (6).

5. A height limiting structure for an electric winch crane according to claim 1, characterized in that: The outer walls of the first screw (5) and the second screw (6) are provided with a number of protrusions of the same size and structure, and the protrusions are symmetrically distributed about the central axis of the first screw (5) and the second screw (6).

6. A height limiting structure for an electric winch crane according to claim 1, characterized in that: The limiting plate (10) and the slide bar (9) constitute a sliding mechanism.

7. A height limiting structure for an electric winch crane according to claim 1, characterized in that: A vision sensor is provided on one side surface of the fixing plate (8).

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