Safety protection limiting device for crane

Abstract

The utility model relates to the technical field of cranes, in particular to a crane safety protection limiting device which comprises a front cross beam and a rear cross beam, a moving trolley capable of moving left and right is installed on the upper sides of the front cross beam and the rear cross beam, and the positions, close to the left end and the right end, of the front cross beam and the rear cross beam are fixedly connected through longitudinal beams. Adjusting assemblies are fixed to the opposite sides of the left longitudinal beam and the right longitudinal beam, supporting plates are arranged at the left ends and the right ends of the front cross beam and the rear cross beam, and the left supporting plate and the right supporting plate which correspond to each other are fixedly connected through a plurality of steel wire ropes which are evenly arranged from top to bottom. When the guide assemblies at the front end and the rear end of the moving trolley are hung on the steel wire ropes on the front side and the rear side correspondingly, the front supporting plate and the rear supporting plate are moved and adjusted in the opposite or opposite directions through the adjusting assemblies, so that the distance between the steel wire ropes on the front side and the rear side is matched with the length of the moving trolley. And therefore, the movable trolley can be better hung and guided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a safety protection limiting device for cranes. Background Art

[0002] Cranes are multi-action lifting machines capable of vertically lifting and horizontally transporting heavy objects within a certain range. Cranes are essential specialized equipment for modern manufacturing, logistics, metallurgy, and other industries. As equipment for aerial work, safety and protection are crucial. However, due to structural requirements and main beam width, fixed guardrails and other protective devices cannot be installed inside the main beam, posing a widespread safety hazard.

[0003] Chinese patent publication number CN216549290U discloses a crane safety protection limiter device, comprising a crane having two main beams and a trolley that moves along the main beams. Both main beams are equipped with traction assemblies, with the ends of the trolley corresponding to the two traction assemblies one-to-one, and each trolley is equipped with a guide assembly that is connected to the corresponding traction assembly. The traction assembly includes two mounting plates fixedly mounted on the two ends of the main beams, and a plurality of steel ropes, each of which is connected to the corresponding mounting plates at both ends. The plurality of steel ropes are horizontally arranged along the length of the main beams. The crane safety protection limiter device proposed in this utility model uses multiple steel ropes to form a fence, and a guide wheel assembly adapted to the steel ropes and mounted on the trolley, thereby achieving high-altitude safety protection on the inner side of the main beam without widening the main beam, changing the overall vehicle structure, or affecting the operation of the trolley.

[0004] The above-mentioned high-altitude safety protection device of the crane can serve as a guardrail while guiding the movement of the mobile trolley through multiple steel wire ropes arranged on both sides, thereby achieving high-altitude safety protection of the crane. However, the distance between the steel wire ropes on both sides of the main beam of the crane cannot be adjusted. During actual installation and use, it cannot be adjusted according to the length of the mobile trolley, and cannot be well coordinated with the guidance of the mobile trolley. Utility Model Content

[0005] In order to solve the problem that the distance between the steel wire ropes of the crane high altitude safety protection device on both sides of the main beam cannot be adjusted, the utility model proposes a crane safety protection limit device.

[0006] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: a crane safety protection limit device, comprising two front and rear cross beams, a movable trolley that can move left and right is installed on the upper side of the front and rear cross beams, the front and rear cross beams are fixedly connected near the left and right ends by longitudinal beams, and adjustment components are fixed on the opposite sides of the left and right longitudinal beams, support plates are provided at the left and right ends of the front and rear cross beams, and the left and right corresponding support plates are fixedly connected by multiple steel wire ropes evenly arranged from top to bottom, the left end of the steel wire rope is fixedly connected to the left support plate, and the right end of the steel wire rope is fixed with a bolt, and the right end of the bolt passes through the right support plate and is fixed with a nut, the front and rear ends of the movable trolley are fixed with left and right guide components hung on the steel wire rope, the front and rear support plates are slidably clamped on the adjustment component on the same side, and the adjustment component can move and adjust the front and rear support plates in relative or opposite directions.

[0007] As a preferred solution, the adjustment assembly includes a guide rail fixed on the longitudinal beam, with fixed plates fixed at the front and rear ends of the guide rail, and screw rods with threads passing through the support plates are rotatably installed on the opposite sides of the two fixed plates. The front and rear screw rods are fixedly connected by a connecting rod, and the threads of the front and rear screw rods rotate in opposite directions. A motor for driving the screw rod to rotate is fixed on one side of the fixed plate.

[0008] As a preferred solution, a slot that is clamped on the guide rail is provided on one side of the support plate near the lower end, and a longitudinal threaded through hole is provided on the upper side of the slot.

[0009] As a preferred solution, the guide assembly includes a guide seat vertically fixed on the mobile trolley, and a plurality of guide pulleys that can be adjusted up and down are installed on the guide seat.

[0010] As a preferred solution, a guide slot is provided in the middle portion of the guide seat on the side facing the wire rope, and a clearance opening is provided on the left side of the guide seat.

[0011] As a preferred solution, a slider is fixed to one end of the central axis of the guide pulley, and a locking screw passing through the clearance opening is threadedly installed on the left side of the slider.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the guide assemblies at the front and rear ends of the mobile trolley are respectively hung on the steel ropes on the front and rear sides, the front and rear support plates are adjusted to move in relative or opposite directions through the adjustment assembly so that the distance between the steel ropes on the front and rear sides is adapted to the length of the mobile trolley, thereby better hanging and guiding the mobile trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the adjustment component of the utility model;

[0016] Figure 3 It is a schematic diagram of the support plate of the present utility model;

[0017] Figure 4 It is a schematic diagram of the guide assembly of the utility model;

[0018] Figure 5 This is a schematic diagram of the guide seat of the utility model;

[0019] Figure 6 It is a schematic diagram of a guide pulley of the present utility model.

[0020] In the figure: 1. Crossbeam; 2. Adjustment assembly; 21. Fixing plate; 22. Screw; 23. Guide rail; 24. Connecting rod; 25. Motor; 3. Longitudinal beam; 4. Support plate; 41. Slot; 5. Moving trolley; 6. Guide assembly; 61. Guide seat; 611. Guide slot; 612. Clearance opening; 62. Guide pulley; 621. Locking screw; 622. Slider; 7. Bolt; 8. Wire rope. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0024] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0027] like Figure 1 As shown, a crane safety protection limit device includes two front and rear cross beams 1, and a mobile trolley 5 that can move left and right is installed on the upper side of the front and rear cross beams 1. The front and rear cross beams 1 are fixedly connected near the left and right ends through longitudinal beams 3, and adjustment components 2 are fixed on the opposite sides of the left and right longitudinal beams 3. Support plates 4 are provided at the left and right ends of the front and rear cross beams 1, and the left and right corresponding support plates 4 are fixedly connected by multiple steel wire ropes 8 evenly arranged from top to bottom. The left end of the steel wire rope 8 is fixedly connected to the support plate 4 on the left, and the right end of the steel wire rope 8 is fixed with a bolt 7, and the right end of the bolt 7 passes through the support plate 4 on the right. The plate 4 is fixed with a nut, and the front and rear ends of the mobile trolley 5 are fixed with two left and right guide components 6 hung on the wire rope 8. The front and rear support plates 4 are slidably mounted on the adjustment component 2 on the same side, and the adjustment component 2 can adjust the movement of the front and rear support plates 4 in relative or opposite directions. When the guide components 6 at the front and rear ends of the mobile trolley 5 are respectively hung on the wire ropes 8 on the front and rear sides, the front and rear support plates 4 are moved in relative or opposite directions by adjusting the adjustment component 2 so that the distance between the wire ropes 8 on the front and rear sides is adapted to the length of the mobile trolley 5, thereby better hanging and guiding the mobile trolley 5.

[0028] like Figure 2 As shown, the adjustment assembly 2 includes a guide rail 23 fixed on the longitudinal beam 3, and a fixing plate 21 is fixed at the front and rear ends of the guide rail 23, and a screw rod 22 with a thread passing through the support plate 4 is rotatably installed on the opposite sides of the two fixing plates 21. The front and rear two screw rods 22 are fixedly connected by a connecting rod 24, and the rotation transmission between the two screw rods 22 is realized by the connecting rod 24, and the threads of the front and rear two screw rods 22 are rotated in opposite directions. A motor 25 for driving the screw rod 22 to rotate is fixed on one side of the fixing plate 21. The motor 25 drives the two screw rods 22 to rotate, and the two rotating screw rods 22 drive the front and rear support plates 4 to move relative or oppositely.

[0029] like Figure 3 As shown, a slot 41 is provided on one side of the support plate 4 near the lower end thereof, and the support plate 4 is mounted on the guide rail 23 through the slot 41 for guiding movement in the forward and backward directions, and a longitudinal threaded through hole is provided on the upper side of the slot 41 for cooperating with the screw rod 22 for movement driving.

[0030] like Figure 4 As shown, the guide assembly 6 includes a guide seat 61 vertically fixed on the mobile trolley 5, and a plurality of guide pulleys 62 that can be adjusted up and down are installed on the guide seat 61. The guide seat 61 adjusts and installs the guide pulley 62, and the guide pulley 62 realizes the guiding cooperation with the wire rope 8.

[0031] like Figure 5As shown, a guide slot 611 is provided in the middle portion of the guide seat 61 facing the wire rope 8 for slidingly clamping and guiding the slider 622, and a clearance opening 612 is provided on the left side of the guide seat 61 for making way for the locking screw 621 when following the movement of the slider 622.

[0032] like Figure 6 As shown, a slider 622 is fixed to one end of the central axis of the guide pulley 62, and the guide pulley 62 is mounted on the guide seat 61 by sliding up and down through the slider 622, and a locking screw 621 is installed on the left side of the slider 622 through the clearance opening 612, and the locking screw 621 is used to lock and fix the adjusted slider 622.

[0033] In this embodiment, when the guide pulleys 62 at the front and rear ends of the mobile trolley 5 are hung on the wire rope 8, the two screw rods 22 are driven to rotate by the motor 25, and the two rotating screw rods 22 drive the front and rear support plates 4 to move relative or oppositely, thereby adjusting the distance between the front and rear wire ropes 8 so that the wire ropes 8 are aligned with the guide pulley 62 and can be hung. The mobile trolley 5 uses the guide pulley 62 to hang on the wire rope 8 to guide and support the mobile trolley 5, and multiple wire ropes 8 form a fence to provide safety protection for the mobile trolley 5.

[0034] The above is a preferred embodiment of the present invention. Technicians in the field of the present invention can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment. Any obvious improvements, replacements or modifications made by technicians in this field on the basis of the present invention are within the scope of protection of the present invention.

Claims

1. A crane safety protection limit device, comprising two front and rear cross beams (1), wherein a movable trolley (5) capable of moving left and right is installed on the upper side of the front and rear cross beams (1), characterized in that: The two front and rear cross beams (1) are fixedly connected near the left and right ends by longitudinal beams (3), and the opposite sides of the left and right longitudinal beams (3) are fixed with adjustment components (2). The left and right ends of the two front and rear cross beams (1) are provided with support plates (4), and the two corresponding left and right support plates (4) are fixedly connected by a plurality of steel wire ropes (8) evenly arranged from top to bottom. The left end of the steel wire rope (8) is fixedly connected to the left support plate (4), and the right end of the steel wire rope (8) is fixed with a bolt (7), and the right end of the bolt (7) passes through the right support plate (4) and is fixed with a nut. The front and rear ends of the movable trolley (5) are fixed with left and right guide components (6) hung on the steel wire rope (8). The two front and rear support plates (4) are slidably mounted on the adjustment component (2) on the same side, and the adjustment component (2) can adjust the movement of the front and rear support plates (4) in relative or opposite directions.

2. A crane safety protection limit device according to claim 1, characterized in that: The adjustment assembly (2) includes a guide rail (23) fixed on the longitudinal beam (3), and a fixing plate (21) is fixed to the front and rear ends of the guide rail (23), and a screw rod (22) with a thread passing through the support plate (4) is rotatably installed on the opposite sides of the two fixing plates (21). The front and rear screw rods (22) are fixedly connected by a connecting rod (24), and the threads of the front and rear screw rods (22) are rotated in opposite directions. A motor (25) for driving the screw rod (22) to rotate is fixed on one side of the fixing plate (21) on one side.

3. A crane safety protection limit device according to claim 2, characterized in that: A slot (41) for being clamped on the guide rail (23) is provided on one side of the support plate (4) near the lower end thereof, and a longitudinal threaded through hole is provided on the support plate (4) above the slot (41).

4. A crane safety protection limit device according to claim 3, characterized in that: The guide assembly (6) comprises a guide seat (61) vertically fixed on the mobile trolley (5), and a plurality of guide pulleys (62) capable of being adjusted up and down are mounted on the guide seat (61).

5. A crane safety protection limit device according to claim 4, characterized in that: A guide slot (611) is provided in the middle portion of the guide seat (61) on the side facing the steel wire rope (8), and a clearance opening (612) is provided on the left side of the guide seat (61).

6. A crane safety protection limit device according to claim 5, characterized in that: A slider (622) is fixed to one end of the central axis of the guide pulley (62), and a locking screw (621) passing through the clearance opening (612) is threadedly installed on the left side of the slider (622).

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