Movable gantry crane with safety protection device

Abstract

The utility model relates to the technical field of gantry cranes, in particular to a movable gantry crane with a safety protection device, which comprises a cross beam, a hoisting mechanism is arranged in the middle of the cross beam, support frames are fixedly connected to two ends of the hoisting mechanism, and a bottom plate is fixedly connected to the lower ends of the support frames. The two sides of the lower end face of the bottom plate are rotationally connected with self-locking universal wheels. A safety positioning assembly and an adjusting assembly are arranged in the middle of the bottom plate, and the adjusting assembly is used for adjusting the distance between the safety positioning assembly and the ground. The safety positioning assembly comprises a main friction plate and an auxiliary friction plate. According to the gantry crane, the safety positioning assembly and the adjusting assembly are arranged, and the safety positioning assembly can be driven by the adjusting assembly to be in contact with the ground, so that the contact surface with the ground is increased, the friction force is improved, the effects of preventing displacement and shaking of the gantry crane are achieved, the positioning stability of the gantry crane is enhanced, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane technology, and specifically to a mobile gantry crane with a safety protection device. Background Technology

[0002] Small mobile gantry cranes play a vital role in many fields, including modern industrial production and logistics. They can move easily within a specific area to lift heavy objects, significantly improving work efficiency and reducing labor costs.

[0003] Most current small mobile gantry cranes move using self-locking casters at the bottom. Positioning is achieved by locking these casters. However, the stability provided by locked casters is poor, and the gantry crane is prone to swaying or even displacement in the event of accidental collisions or strong winds, posing a safety hazard. Therefore, those skilled in the art have provided a mobile gantry crane with a safety protection device to solve the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this utility model is to provide a mobile gantry crane with a safety protection device to solve the above-mentioned technical problems.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A mobile gantry crane with a safety protection device includes a crossbeam, a hoisting mechanism is provided in the middle of the crossbeam, a support frame is fixedly connected to both ends of the hoisting mechanism, a base plate is fixedly connected to the lower end of the support frame, and self-locking casters are rotatably connected to both sides of the lower end face of the base plate.

[0007] A safety positioning component and an adjustment component are respectively provided in the middle of the base plate. The adjustment component is used to adjust the distance between the safety positioning component and the ground.

[0008] The safety positioning component includes a main friction plate and a secondary friction plate. The main friction plate is rotatably connected to the secondary friction plate via a hinge. The main friction plate is located below the base plate, and the secondary friction plate is located outside the main friction plate.

[0009] Furthermore, the adjustment assembly includes a housing fixedly connected to the base plate, and a worm gear and a worm are rotatably connected inside the housing. A lead screw is sleeved on the inner side of the worm gear, the lower end of the lead screw is fixedly connected to the main friction plate, and a handwheel is fixed to the outer end of the worm.

[0010] Furthermore, a guide rod is fixedly connected to the side of the main friction plate away from the connection with the lead screw, and the guide rod is slidably sleeved with the base plate;

[0011] Furthermore, a double-hole socket is fixed on the upper end face of the main friction plate. The double-hole socket is L-shaped and has two insertion holes, one vertical and one horizontal. A single-hole socket is fixed on the upper end face of the secondary friction plate. The hole of the single-hole socket is aligned with the vertical hole of the double-hole socket and a positioning pin is inserted therein.

[0012] Furthermore, after the secondary friction plate is rotated 90°, the hole position of the single-hole connector is aligned with the horizontal hole position of the double-hole connector;

[0013] Furthermore, both the main friction plate and the secondary friction plate include a fixing plate, and the lower end face of the fixing plate is fixedly connected to a contact pad by multiple bolts;

[0014] Furthermore, the lower end surface of the contact pad is provided with anti-slip texture;

[0015] The beneficial effects of this utility model are:

[0016] This utility model proposes a mobile gantry crane with a safety protection device, which is equipped with a safety positioning component and an adjustment component. When the gantry crane needs to be stopped or positioned, the adjustment component can drive the safety positioning component to contact the ground, thereby increasing the contact area with the ground, improving friction, preventing displacement and shaking of the gantry crane, enhancing the stability of the gantry crane during positioning, and improving safety. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is an overall structural diagram of a mobile gantry crane with a safety protection device proposed in this utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a cross-sectional view of the adjusting component in a mobile gantry crane with a safety protection device proposed in this utility model;

[0021] Figure 4 This is a structural diagram of the main friction plate and the auxiliary friction plate in a mobile gantry crane with a safety protection device proposed in this utility model;

[0022] Figure 5 This is a structural diagram of the folded auxiliary friction plate of a mobile gantry crane with a safety protection device proposed in this utility model.

[0023] Figure label:

[0024] 1. Base plate; 2. Support frame; 3. Crossbeam; 4. Lifting mechanism; 5. Adjustment assembly; 51. Housing; 52. Lead screw; 53. Handwheel; 54. Worm gear; 55. Worm; 6. Safety positioning assembly; 61. Main friction plate; 611. Fixing plate; 612. Contact pad; 613. Bolt; 62. Secondary friction plate; 63. Guide rod; 64. Double-hole connector; 65. Positioning pin; 66. Single-hole connector; 67. Hinge; 7. Self-locking caster wheel. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1 to 5 As shown, a mobile gantry crane with a safety protection device in this embodiment of the present invention includes a crossbeam 3, a hoisting mechanism 4 is provided in the middle of the crossbeam 3, a support frame 2 is fixedly connected to both ends of the hoisting mechanism 4, a base plate 1 is fixedly connected to the lower end of the support frame 2, and self-locking casters 7 are rotatably connected to both sides of the lower end face of the base plate 1. The hoisting mechanism 4 adopts the structure of the prior art, which will not be described in detail here. The self-locking casters 7 are provided to facilitate the flexible movement of the gantry crane and its self-locking position.

[0027] The base plate 1 is equipped with a safety positioning component 6 and an adjustment component 5 in the middle. The adjustment component 5 is used to adjust the distance between the safety positioning component 6 and the ground. When the gantry crane needs to stop or be positioned, the adjustment component 5 can be used to drive the safety positioning component 6 to contact the ground, thereby increasing the contact area with the ground, increasing friction, preventing the gantry crane from shifting and shaking, enhancing the stability of the gantry crane during positioning, and improving safety.

[0028] Specifically, the safety positioning component 6 includes a main friction plate 61 and a secondary friction plate 62. The main friction plate 61 is rotatably connected to the secondary friction plate 62 via a hinge 67. The main friction plate 61 is located below the base plate 1, and the secondary friction plate 62 is located outside the main friction plate 61. When positioning the gantry crane, the main friction plate 61 and the secondary friction plate 62 can contact the ground, thereby increasing friction and enhancing stability.

[0029] The secondary friction plate 62 can be folded up to reduce extra space occupation and make it flexible and convenient to use.

[0030] Specifically, a double-hole socket 64 is fixed to the upper end face of the main friction plate 61. The double-hole socket 64 is L-shaped and has two socket holes, one vertical and one horizontal. A single-hole socket 66 is fixed to the upper end face of the auxiliary friction plate 62. The hole of the single-hole socket 66 is aligned with the vertical hole of the double-hole socket 64, and a positioning pin 65 is inserted therein. The positioning pin 65 limits the auxiliary friction plate 62 to ensure that it can stably play a positioning role. When the positioning pin 65 is pulled out, the limitation on the auxiliary friction plate 62 can be released, allowing the auxiliary friction plate 62 to flip up.

[0031] Please see Figure 5 As shown, after the secondary friction plate 62 is rotated 90°, the hole position of the single-hole plug 66 is aligned with the horizontal hole position of the double-hole plug 64. After alignment, the positioning pin 65 can be inserted to complete the positioning of the secondary friction plate 62.

[0032] Please see Figure 2 and Figure 3 As shown, in one embodiment of this utility model, the adjusting component 5 includes a housing 51 fixedly connected to the base plate 1. Inside the housing 51, a worm gear 54 and a worm 55 are rotatably connected and meshed with each other. A lead screw 52 is sleeved on the inner side of the worm gear 54. The lower end of the lead screw 52 is fixedly connected to the main friction plate 61. A handwheel 53 is fixed to the outer end of the worm 55. When the adjusting component 5 is in use, rotating the handwheel 53 drives the worm 55 to rotate, which in turn drives the worm gear 54 to rotate, causing the lead screw 52 to rise and fall. When the lead screw 52 falls, it drives the main friction plate 61 to press down and contact the ground and tighten. The transmission structure of the worm gear 54 and the worm 55 has a self-locking function, which can meet the locking requirements after adjustment.

[0033] In addition, to ensure the stability of the main friction plate 61 during adjustment, a guide rod 63 is fixedly connected to the side of the main friction plate 61 away from the connection with the lead screw 52. The guide rod 63 is slidably sleeved with the base plate 1. The guide rod 63 can constrain the main friction plate 61 to prevent it from tilting during adjustment, thereby ensuring full contact with the ground.

[0034] Please see Figure 4 As shown, in one embodiment of this utility model, both the main friction plate 61 and the secondary friction plate 62 include a fixing plate 611. The lower end face of the fixing plate 611 is fixedly connected to a contact pad 612 by a plurality of bolts 613. The main friction plate 61 and the secondary friction plate 62 have the same structure and are both provided with a detachable contact pad 612. The pad can be replaced by removing the bolts 613, resulting in low replacement cost after wear.

[0035] In order to improve friction and enhance anti-slip effect, anti-slip texture is provided on the lower end surface of the contact pad 612.

[0036] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A mobile gantry crane with safety protection device, comprising a crossbeam (3), a hoisting mechanism (4) is arranged at the middle part of the crossbeam (3), characterized in that: Both ends of the hoisting mechanism (4) are fixedly connected with support frames (2), the lower ends of the support frames (2) are fixedly connected with bottom plates (1), and the lower end faces of the bottom plates (1) are rotatably connected with self-locking universal wheels (7). The middle parts of the bottom plates (1) are respectively provided with safety positioning assemblies (6) and adjusting assemblies (5), and the adjusting assemblies (5) are used for adjusting the distance between the safety positioning assemblies (6) and the ground. The safety positioning assembly (6) comprises a main friction plate (61) and a secondary friction plate (62), the main friction plate (61) is rotatably connected with the secondary friction plate (62) through a hinge (67), the main friction plate (61) is arranged below the bottom plate (1), and the secondary friction plate (62) is arranged outside the main friction plate (61).

2. The mobile gantry crane with safety guard of claim 1, wherein: The adjusting assembly (5) comprises an outer shell (51) fixedly connected with the bottom plate (1), the inner side of the outer shell (51) is rotatably connected with a worm wheel (54) and a worm (55) in mesh with each other, the inner side of the worm wheel (54) is sleeved with a lead screw (52), the lower end of the lead screw (52) is fixedly connected with the main friction plate (61), and the outer end of the worm (55) is fixedly connected with a hand wheel (53).

3. The mobile gantry crane with safety guard of claim 2, wherein: The side, away from the connecting position of the lead screw (52), of the main friction plate (61) is fixedly connected with a guide rod (63), and the guide rod (63) is slidably sleeved with the bottom plate (1).

4. The mobile gantry crane with safety guard of claim 1, wherein: The upper end face of the main friction plate (61) is fixedly connected with a double-hole plug-in seat (64), the double-hole plug-in seat (64) is L-shaped and has two plug-in holes in the vertical and horizontal directions, the upper end face of the secondary friction plate (62) is fixedly connected with a single-hole plug-in seat (66), the hole position of the single-hole plug-in seat (66) is aligned with the vertical hole position of the double-hole plug-in seat (64) and is plugged with a positioning pin (65).

5. The mobile gantry crane with safety guard of claim 4, wherein: After the secondary friction plate (62) is turned over by 90°, the hole position of the single-hole plug-in seat (66) is aligned with the horizontal hole position of the double-hole plug-in seat (64).

6. The mobile gantry crane with safety guard of claim 1, wherein: Both the main friction plate (61) and the secondary friction plate (62) comprise a fixed plate (611), and the lower end face of the fixed plate (611) is fixedly connected with a contact pad (612) through a plurality of bolts (613).

7. The mobile gantry crane with safety guard of claim 6, wherein: The lower end face of the contact pad (612) is provided with anti-skid lines.

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