A mobile gantry crane

Abstract

This utility model belongs to the field of lifting technology, specifically relating to a mobile gantry crane. A mobile gantry crane with added support rods forms a triangular support, making it more stable. The mobile gantry crane includes two opposing gantry frames, with a main beam between the tops of the frames, and a hoist hook suspended from the main beam; the gantry frames include two vertical rods, with a horizontal rod connecting the tops of the vertical rods; casters are installed on the bottom surfaces of the vertical rods; support rods are installed on the bottom two sides of the vertical rods; the tops of the support rods are hinged to the sides of the vertical rods via pins; a first connecting piece is provided on the inner side of the support rod, and a first pin is inserted between the first connecting piece and the vertical rod for connection and fixation; the two support rods together form a triangle.

Description

Technical Field

[0001] This utility model belongs to the field of lifting technology, specifically relating to a mobile gantry crane. Background Technology

[0002] The structure of a gantry crane resembles a portal frame, with the main beam and legs forming the portal structure. The main beam enables the lifting of goods, while the legs allow movement on the ground; it is used for loading, unloading, and transporting goods indoors or outdoors.

[0003] Casters are installed at the bottom of the outriggers for movement; these casters may be equipped with braking functions. The weight of the load being lifted onto the main beam rests on the casters. Currently, the outriggers are individually supported; if the load sways during movement, the support will shift, resulting in poor support effectiveness and instability. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned background technology, the purpose of this utility model is to provide a mobile gantry crane with added support rods to form triangular support, which is more stable.

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0006] A mobile gantry crane includes two opposing gantry frames, with a main beam between the tops of the gantry frames and a hoist hook suspended from the main beam;

[0007] The gantry includes two vertical rods, with a horizontal rod connecting the top of the vertical rods; casters are installed on the bottom surface of the vertical rods; support rods are installed on the bottom two sides of the vertical rods; the top of the support rods is hinged to the side of the vertical rods by a pin; a first connecting piece is provided on the inner side of the support rod, and a first pin is inserted between the first connecting piece and the vertical rod for connection and fixation; the two support rods together form a triangle.

[0008] Based on the above scheme and as a preferred embodiment: the two ends of the crossbar are welded and fixed to the top of the vertical bar respectively; a first sliding sleeve is fitted on the crossbar; the first sliding sleeve is U-shaped in general, and four first through holes are opened on the two side walls of the first sliding sleeve respectively; a small rotating shaft spans the first through holes and the two ends of the small rotating shaft are screwed into the first sliding sleeve through bolts for connection and fixation; a bearing is fitted on the small rotating shaft and the bearing is inserted into the first through hole and contacts the crossbar.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the top wall of the first sliding sleeve has two second through holes; the two sides of the second through holes are provided with first fixing plates, a long rotating shaft is passed between the two first fixing plates, a first roller is sleeved on the long rotating shaft, and the first roller is inserted into the second through hole and contacts the crossbar.

[0010] Based on the above scheme and as a preferred embodiment: the crossbar has first elongated holes facing each other on both sides; the top wall of the crossbar has several third through holes; long bolts are inserted into the side walls of the first sliding sleeve, pass through the first elongated holes, and are secured with nuts; a cross bracket is welded to the top of the first sliding sleeve, and a U-shaped tube is welded to the top of the cross bracket, with the two openings of the U-shaped tube facing downwards; it also includes a tower-shaped pendant block; a pull rope is connected to the tail end of the pendant block, the pendant block passes through the first sliding sleeve and is inserted into the third through hole, and the pull rope passes through the U-shaped tube for pulling.

[0011] Based on the above scheme and as a preferred embodiment: the main beam includes a steel profile; a first groove is provided inside the bottom end of the profile; a sliding plate is inserted into the groove, and a pair of pulleys are inserted into the top of the sliding plate; a first hook groove is provided at the bottom of the sliding plate, through which a lifting rod passes, and the lifting rod is used to hook the hoist hook; a first connecting plate is welded to both ends of the steel profile, and countersunk bolts pass through the side wall of the sliding sleeve and the first connecting plate and are screwed on with nuts for fixation, and the profile is mounted on the two sliding sleeves.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the caster includes a housing, the top and bottom surfaces of which are welded with a first connecting post, and the bottom surface of the first connecting post is threadedly connected with a stud lifting foot.

[0013] Based on the above scheme and as a preferred embodiment: a U-shaped connecting block is fixed to the side of the vertical rod; a pin passes through the top two ends of the support rod and is riveted to the two side walls of the U-shaped connecting block; a magnet is also included, and bolts pass through the two ends of the magnet and are connected to the side of the vertical rod for fixing, and the magnet is used to attract the support rod.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: an L-shaped connecting plate is fixed on the inner side plate of the strut; a bolt passes through the L-shaped connecting plate and the first connecting piece and is screwed on with a nut to achieve hinge; a first insert plate is fixed on the surface of the vertical rod, and a first pin is inserted into the first insert plate and the first connecting piece for connection and fixation.

[0015] Based on the above scheme and as a preferred option, a rubber pad is attached to the bottom surface of the support rod.

[0016] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0017] Compared with existing technologies, this utility model of a mobile gantry crane includes two opposing vertical rods with casters installed at the bottom for movement. A support rod is added to the bottom side of the vertical rod, hinged to it via a pin, allowing the support rod to rotate and contact the ground. The support rod is connected to the vertical rod via a first connecting piece, with the first pin passing through the first connecting piece for a detachable connection. The two support rods and the vertical rod form a triangle, achieving a stable triangular support effect, resulting in better support and stability.

[0018] A first sliding sleeve is fitted on the crossbar. The first sliding sleeve adopts a rolling movement structure on the crossbar. The main beam is installed between the two first sliding sleeves to realize the longitudinal movement of the main beam.

[0019] The main beam is equipped with a first sliding groove, and the sliding plate rolls with a pulley between itself and the first sliding groove, so that the hoist hook can move laterally. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the gantry structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the exploded structure of the main beam of this utility model.

[0024] Figure 5 This is a schematic diagram of the caster structure of this utility model.

[0025] Figure 6 This is a side view of the gantry structure of this utility model.

[0026] Figure 7 This is a schematic diagram of the first sliding sleeve structure of this utility model.

[0027] Figure 8 This is a schematic diagram of the first sliding sleeve structure of this utility model.

[0028] Reference numerals: gantry 01; vertical rod 010; U-shaped connecting block 0100; magnet 0101; first insert plate 0102; horizontal bar 011; first elongated hole 0110; third through hole 0111; main beam 02; first sliding groove 020; sliding plate 021; pulley 0210; first hook groove 0211; hanging rod 0212; first connecting plate 022; hoist hook 03; caster 04; outer casing 040; first connecting column 0 400; Stud lifting foot 0401; Support rod 05; First connecting piece 050; First pin 051; L-shaped connecting plate 052; Rubber pad 053; First sliding sleeve 06; First through hole 060; Small rotating shaft 061; Bearing 062; Second through hole 063; First fixing plate 064; Long rotating shaft 065; First roller 066; Cross bracket 067; U-shaped tube 0670; Pendant block 068; Pull rope 0680. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments;

[0030] This embodiment provides a mobile gantry crane, including two opposing gantry frames 01, with a main beam 02 positioned between the tops of the gantry frames 01. A hoist hook 03 is suspended from the main beam 02. The two gantry frames 01 and the main beam 02 together form a frame-shaped main structure. The hoist hook 03 is suspended from the main beam 02 and used as a lifting hook. The hoist hook 03 can be manual or electric. The gantry frames 01 and the main beam 02 are assembled from metal parts.

[0031] The gantry 01 includes two vertical bars 010, with a horizontal bar 011 connecting the top of the vertical bars 010. The vertical bars 010 and the horizontal bar 011 are made of metal square tubing. The two vertical bars 010 are arranged opposite each other, forming a gantry frame with the horizontal bar 011. Casters 04 are installed on the bottom surface of the vertical bars 010. The casters 04 are installed at the bottom of the vertical bars 010, allowing the gantry 01 to be moved and pushed to the desired position. Bolts pass through the outer shell 040 of the casters 04 and are connected and fixed to the bottom of the vertical bars 010, or the casters 04 are welded and fixed to the vertical bars 010.

[0032] Support rods 05 are installed on both sides of the bottom of the vertical rod 010. The support rods 05 are metal tubes, which have better strength. The top of the support rod 05 is hinged to the side of the vertical rod 010 by a pin. The hinged connection between the top of the support rod 05 and the side of the vertical rod 010 allows the support rod 05 to rotate up and down for easy folding or use. A first connecting piece 050 is provided on the inner side of the support rod 05. A first pin 051 is inserted between the first connecting piece 050 and the vertical rod 010 for connection and fixation. The first connecting piece 050 connects the support rod 05 and the vertical rod 010 to prevent them from separating. The first pin 051 can be removed when not in use. The two support rods 05 form a triangle, which has good stability.

[0033] As described above, a support rod 05 is installed on each of the two sides of the vertical rod 010. After the gantry 01 is moved to the required position, the two support rods 05 are lowered to contact the ground to form support, and together with the vertical rod 010, they form a stable triangular support structure.

[0034] Furthermore, the two ends of the horizontal bar 011 are welded and fixed to the top of the vertical bar 010 respectively; the vertical bar 010 and the horizontal bar 011 are welded together to ensure their firmness and prevent deformation and damage; a first sliding sleeve 06 is fitted on the horizontal bar 011; the first sliding sleeve 06 is U-shaped in general and is made of three pieces of metal welded together, and is fitted on the horizontal bar 011. The size of the first sliding sleeve 06 is determined according to the design requirements; four first through holes 060 are opened on the two side walls of the first sliding sleeve 06 respectively, and a small rotating shaft 061 spans the first through holes 060 and the two ends of the small rotating shaft 061 are respectively screwed into the first sliding sleeve 06 for connection and fixation through bolts; a bearing 062 is fitted on the small rotating shaft 061, and the bearing 062 is inserted into the first through hole 060 and contacts the horizontal bar 011.

[0035] As described above, a U-shaped first sliding sleeve 06 is fitted onto the crossbar 011, and bearings 062 are installed on both sides of the first sliding sleeve 06. The bearings 062 contact the crossbar 011 for support and rolling, achieving rolling contact, reducing friction during movement, and making the movement smoother.

[0036] Furthermore, the top wall of the first sliding sleeve 06 has two second through holes 063; the two sides of the second through holes 063 are provided with first fixing plates 064 protruding out, and a long rotating shaft 065 is passed between the two first fixing plates 064. A first roller 066 is sleeved on the long rotating shaft 065, and the first roller 066 is inserted into the second through hole 063 and contacts the crossbar 011.

[0037] As described above, the top wall of the first sliding sleeve 06 also uses a rolling mechanism with the crossbar 011 to reduce friction, facilitate movement, and realize the longitudinal movement of the main beam 02 on the gantry 01;

[0038] Furthermore, the crossbar 011 has first elongated holes 0110 facing each other on both side walls; the crossbar 011 has several third through holes 0111 on its top wall; the first elongated holes 0110 are arranged along the length of the crossbar 011. The several third through holes 0111 are arranged at uniform or non-uniform intervals.

[0039] Long bolts are inserted into the two side walls of the first sliding sleeve 06, passing through the first elongated hole 0110, and screwed on with nuts to fix it; the long bolts limit the first sliding sleeve 06 within the range of the first elongated hole 0110, preventing the first sliding sleeve 06 from rolling out of the crossbar 011;

[0040] The top of the first replacement sleeve is welded with a cross bracket 067, and the top of the cross bracket 067 is welded with a U-shaped tube 0670, with the two openings of the U-shaped tube 0670 facing downwards; the cross bracket 067 supports the U-shaped tube 0670, and the U-shaped tube 0670 is used as a channel;

[0041] It also includes a tower-shaped pendant block 068; the pendant block 068 is made of metal, is heavy, and not easily broken. The tower-shaped pendant block 068 has a protruding center that acts as a stop; the tail end of the pendant block 068 is connected to a pull rope 0680. The pendant block 068 passes through the first sliding sleeve 06 and is inserted into the third through hole 0111. The pull rope 0680 passes through the U-shaped tube 0670 for pulling. The pull rope 0680 can be a metal rope welded to the pendant block 068.

[0042] As described above, in practical use, first pull the suspension rope to lift the pendant block 068 up, away from the third through hole 0111; after the first sliding sleeve 06 moves to the desired position, release the suspension rope, and the pendant block 068 falls due to its own weight, with its head inserting into the third through hole 0111 and remaining stationary. The gantry 01 is on a slope, preventing the third sliding sleeve from moving, thus enhancing safety.

[0043] In another embodiment, the pendant block 068 is a spring pin, with a spring fitted on the top of the pin. The top surface of the pin is welded to the pull rope 0680, which passes through the spring. The spring is secured to the bottom of the cross bracket 067. When the pull rope 0680 is pulled down, the spring is compressed, pulling out the pin. After the pull rope 0680 is released, the potential energy of the spring extends and pushes the pin into the third through hole 0111 for fixation.

[0044] Furthermore, the main beam 02 includes a steel profile; a first groove 020 is provided inside the bottom end of the profile; a sliding plate 021 is inserted into the groove, and a pair of pulleys 0210 are inserted into the top of the sliding plate 021; the wheel axle passes through the sliding plate 021, and the two ends of the wheel axle are respectively embedded in the pulleys 0210. The pulleys 0210 slide into the end face of the first groove 020 to achieve rolling connection, and can roll to the desired position within the first groove 020.

[0045] The bottom of the slide plate 021 is provided with a first hook groove 0211, through which a rod 0212 passes. The rod 0212 is used to hook the hoist hook 03. The rod 0212 is embedded in the first hook groove 0211 for fixation. The rod 0212 can also be welded to the first hook groove 0211.

[0046] The two ends of the steel profile are welded with first connecting plates 022 respectively. Countersunk bolts pass through the side wall of the sliding sleeve and the first connecting plate 022 and are screwed on with nuts to fix them. The profile is mounted on the two sliding sleeves.

[0047] As described above, the steel section is connected to the first sliding sleeve 06 by passing through the first connecting plate 022 as an intermediate part and countersunk bolts. The steel section can be removed later by disassembling the countersunk bolts.

[0048] Furthermore, the caster 04 includes a housing 040, on the top and bottom surfaces of the housing 040, a first connecting post 0400 is welded, and a stud lifting foot 0401 is threadedly connected to the bottom surface of the first connecting post 0400.

[0049] As described above, by adding a rotatable and adjustable stud lifting foot 0401 to the caster 04, the caster 04 can be moved when not under load. Once the desired position is reached, the stud lifting foot 0401 can be rotated down to contact the ground, thus transforming it into a fixed support. This reduces the stress on the caster 04 and makes the support more stable.

[0050] Furthermore, a U-shaped connecting block 0100 is fixed to the side of the vertical rod 010; a pin passes through the top two ends of the support rod 05 and is riveted to the side walls of the U-shaped connecting block 0100; a bolt passes through the U-shaped connecting block 0100 and is connected and fixed to the vertical rod 010, or the U-shaped connecting block 0100 is welded to the vertical rod 010. The support rod 05 is hinged to the U-shaped connecting block 0100, enabling it to be flipped.

[0051] It also includes a magnet 0101, with bolts passing through both ends of the magnet 0101 and connecting and fixing it to the side of the vertical rod 010. The magnet 0101 is used to attract the support rod 05.

[0052] As described above, magnet 0101 is fixed to vertical rod 010. When the support rod 05 is not in use, it flips upward and attracts the ferromagnetic magnet, making it easy to fold up and move.

[0053] In another embodiment, the magnet 0101 is directly attached to the vertical rod 010, and can be removed directly when not in use, making it convenient to replace.

[0054] Furthermore, an L-shaped connecting plate 052 is fixed to the inner side plate of the strut 05; the L-shaped connecting plate 052 and the strut 05 can be fixed by bolts or by welding; the bolts pass through the L-shaped connecting plate 052 and the first connecting piece 050 and are screwed on with nuts to achieve hinge connection;

[0055] A first insert plate 0102 is fixed to the surface of the vertical rod 010. A first pin is inserted into the first insert plate 0102 and the first connecting piece 050 for connection and fixation. The first insert plate 0102 and the vertical rod 010 can be fixed by bolts or by welding.

[0056] As described above, when the support rod 05 is lowered to support the ground, the first connecting piece 050 and the first insert plate 0102 are joined together, and the first pin passes through both to achieve connection. This prevents the support rod 05 from moving and makes the support more stable.

[0057] Furthermore, a rubber pad 053 is attached to the bottom surface of the strut 05.

[0058] As mentioned above, the rubber pad 053 acts as a buffer and shock absorber, and during the lifting and lowering of heavy objects, the support rod 05 will not make direct hard contact with the ground, thus reducing damage.

[0059] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this utility model, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-on," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection.

[0061] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A mobile gantry crane, characterized in that: It includes two opposing portal frames, with a main beam between the tops of the portal frames, and a hoist hook suspended from the main beam; The gantry includes two vertical rods, with a horizontal rod connecting the top of the vertical rods; casters are installed on the bottom surface of the vertical rods; support rods are installed on the bottom two sides of the vertical rods; the top of the support rods is hinged to the side of the vertical rods by a pin; a first connecting piece is provided on the inner side of the support rod, and a first pin is inserted between the first connecting piece and the vertical rod for connection and fixation; the two support rods together form a triangle.

2. The mobile gantry crane according to claim 1, characterized in that: The two ends of the crossbar are welded and fixed to the top of the vertical bar respectively; a first sliding sleeve is fitted on the crossbar; the first sliding sleeve is U-shaped in general, and four first through holes are opened on the two side walls of the first sliding sleeve respectively. The small rotating shaft spans the first through holes and the two ends of the small rotating shaft are screwed into the first sliding sleeve through bolts for connection and fixation. A bearing is fitted on the small rotating shaft and the bearing is inserted into the first through hole and contacts the crossbar.

3. The mobile gantry crane according to claim 2, characterized in that: The top wall of the first sliding sleeve has two second through holes; a first fixing plate is provided on both sides of the second through hole, and a long rotating shaft is passed between the two first fixing plates. A first roller is sleeved on the long rotating shaft, and the first roller is inserted into the second through hole and contacts the crossbar.

4. The mobile gantry crane according to claim 2 or 3, characterized in that: The crossbar has first elongated holes facing each other on both sides; the crossbar has several third through holes on its top wall. Long bolts are inserted into the two side walls of the first sliding sleeve, passing through the first elongated hole, and then screwed on with nuts to secure them. The top of the first replacement sleeve is welded with a cross bracket, and the top of the cross bracket is welded with a U-shaped tube with the two openings of the U-shaped tube facing downwards. It also includes a tower-shaped pendant block; the tail end of the pendant block is connected to a pull rope, the pendant block passes through the first sliding sleeve and is inserted into the third through hole, and the pull rope passes through the U-shaped tube for pulling.

5. The mobile gantry crane according to claim 1, characterized in that: The main beam includes steel profiles; a first groove is provided inside the bottom end of the profile; a sliding plate is inserted into the groove, and a pair of pulleys are inserted into the top of the sliding plate; a first hook groove is provided at the bottom of the sliding plate, and a lifting rod passes through the first hook groove, which is used for the hoist hook to hook. The two ends of the steel profile are welded with first connecting plates. Countersunk bolts pass through the side wall of the sliding sleeve and the first connecting plate and are screwed on with nuts to fix them. The profile is mounted on the two sliding sleeves.

6. The mobile gantry crane according to claim 1, characterized in that: The caster includes a housing, with a first connecting post welded to the top and bottom surfaces of the housing, and a stud lifting foot threadedly connected to the bottom surface of the first connecting post.

7. The mobile gantry crane according to claim 1, characterized in that: A U-shaped connecting block is fixed to the side of the vertical rod; the pin passes through the top two ends of the support rod and is riveted to the two side walls of the U-shaped connecting block; It also includes magnets, with bolts passing through both ends of the magnets and connecting them to the sides of the vertical rod for fixation. The magnets are used to attract the support rods.

8. The mobile gantry crane according to claim 7, characterized in that: An L-shaped connecting plate is fixed to the inner side plate of the strut; bolts pass through the L-shaped connecting plate and the first connecting piece and are screwed on with nuts to achieve hinge; A first insert plate is fixed to the surface of the vertical rod, and a first pin is inserted into the first insert plate and the first connecting piece for connection and fixation.

9. The mobile gantry crane according to claim 7, characterized in that: Rubber pads are attached to the bottom of the strut.

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