Portal crane with orbital transfer function

Abstract

The invention discloses a portal crane with an orbital transfer function, and relates to the technical field of cranes, the portal crane with the orbital transfer function comprises a top frame, supporting stand columns are fixedly connected below the top frame in a rectangular array mode, and orbital wheel sets are fixedly connected below the supporting stand columns in a rectangular array mode; the ends, away from the top frame, of the supporting stand columns are movably connected with auxiliary lifting frames, and the other ends of the auxiliary lifting frames are movably connected with rail transfer auxiliary wheels. The auxiliary lifting frame comprises an extension support arranged in a U shape. According to the portal crane, due to the fact that the extension support is integrally arranged in a U shape, and the hydraulic cylinder is located on the inner side of the extension support, when the connecting position of the extension support and the hydraulic cylinder crosses the dead point position, the portal crane can be stably lifted, and the structure can be stored under the condition that rails are not changed; therefore, normal movement of the two sides of the portal crane is not affected.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of cranes, in particular to a gantry crane with a track changing function. Background Art

[0002] A gantry crane, also known as a portal crane or gantry crane, is a variation of a bridge crane. It boasts high site utilization, a large operating range, wide adaptability, and strong versatility. It can be customized to suit various work environments and cargo lifting requirements. Through the operation of the trolley mechanism and the lifting trolley, as well as the lifting and lowering of the hoisting mechanism, the crane can lift cargo within a rectangular space. The driver operates the controller in the cab, controlling the motors of the various mechanisms to achieve the lifting, lowering, lateral, and longitudinal movement of the cargo.

[0003] However, in practice, in some large work sites, such as large ports, freight yards or factory workshops, cargo is widely distributed in different areas. Since the gantry crane relies on the bottom track to move, the working range of the crane will be limited by the distance of the track, and it is impossible to lift and transport cargo in different areas, which leads to limited cargo transportation. In addition, the crane needs to be towed when changing tracks, and the inertia generated by the towing makes it difficult to stop, and it is impossible to stop quickly. It is easy to collide with the track, causing damage. Summary of the Invention

[0004] The present invention aims to provide a gantry crane with a track-changing function. A lifting mechanism is installed on both sides of the gantry crane. A hydraulic lever pushes the wheel mechanisms at the ends toward the ground, lifting the entire gantry crane. This, combined with the wheel mechanisms at the bottom, facilitates the movement of the gantry crane onto another track. This solves the technical problems identified in the background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A gantry crane with a track-changing function comprises a top frame, support columns are fixedly connected to the bottom of the top frame in a rectangular array, track wheel sets are fixedly connected to the bottom of the support columns in a rectangular array, and an auxiliary lifting frame is movably connected to one end of the support column away from the top frame, and the other end of the auxiliary lifting frame is movably connected to a track-changing auxiliary wheel; Among them, the auxiliary lifting frame includes a U-shaped extension bracket, one end of the extension bracket is movably connected to a triangular axis bracket, and the triangular axis bracket is fixedly connected to the side of the supporting column, and a hydraulic lifting rod is placed on the inner side of the extension bracket.

[0006] As a further technical solution of the present invention, the hydraulic lifting rod includes a hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected to a pin shaft seat, the side of the triangular axis frame away from the extension bracket is fixedly connected to a staggered axis rod, and the staggered axis rod passes through the pin shaft seat and is movably connected to the staggered axis rod.

[0007] As a further technical solution of the present invention, a movable pull plate fixedly connected to the end of the hydraulic cylinder is provided between the end of the hydraulic cylinder away from the pin shaft seat and the movable shaft seat, and a rectangular array of movable connection limiting movable rods are arranged in the movable pull plate, and an auxiliary compression spring is sleeved on the outside of each of the limiting movable rods.

[0008] As a further technical solution of the present invention, one end of the limiting movable rod is fixedly connected to the movable shaft seat, and the other end passes through the movable pull plate and is threadedly connected to a locking bolt. The auxiliary compression spring is located between the movable shaft seat and the movable pull plate, and a compression main spring is also fixedly connected between the movable shaft seat and the movable pull plate.

[0009] As a further technical solution of the present invention, the hydraulic cylinder is located inside the extension bracket, and the movable shaft seat is movably connected to one end of the extension bracket away from the triangular shaft frame, and the triangular shaft frame is fixedly connected to the side of the supporting column.

[0010] As a further technical solution of the present invention, the track-changing auxiliary wheel includes a flip frame movably connected to the end of the extension bracket, the bottom of the flip frame is movably connected to the wheel frame through a pin shaft, and each of the wheel frames is movably connected to the rail wheels at both ends.

[0011] As a further technical solution of the present invention, a sliding frame is movably connected above the top frame, both ends of the sliding frame are transmission-matched with rack rods, and the bottom of the rack rods is fixedly connected to a workpiece lifting frame.

[0012] As a further technical solution of the present invention, a brake is further installed on the side of the auxiliary lifting frame, and the brake includes a brake disc arranged coaxially with the rail wheel, and the brake disc is fixedly connected to the end of the rail wheel; The brake also includes a fixing seat fixedly connected to the side of the wheel frame, and a brake seat is provided between the fixing seat and the brake disc, and a limit rod is symmetrically fixedly connected to one side of the brake seat close to the fixing seat.

[0013] As a further technical solution of the present invention, a deceleration spring is sleeved on the outer side of the limit rod, and the deceleration spring is located between the fixed seat and the brake seat, and the end of the limit rod away from the brake seat passes through the fixed seat.

[0014] As a further technical solution of the present invention, a mounting groove is also provided in the fixing seat, and a guide concave wheel is movably connected in the mounting groove. A steel wire rope is fixedly connected to the side of the brake seat, and the other end of the steel wire rope bypasses the guide concave wheel in the mounting groove and extends to a side away from the fixing seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the output rod of the hydraulic lifting rod to push the extension bracket to flip downward, so that the track-changing auxiliary wheels at the end of the extension bracket contact the ground. After mutual cooperation, the support column can be lifted up as a whole. The track-changing auxiliary wheels are used to change the track of the entire gantry crane, thereby increasing the range of movement of the gantry crane. In the present invention, since the extension bracket is arranged in a U-shape as a whole and the hydraulic cylinder is located on the inner side of the extension bracket, when the connection between the extension bracket and the hydraulic cylinder passes the dead point position, the gantry crane can be stably lifted. Moreover, this structure can be stored without changing the track, thereby not affecting the normal movement of both sides of the gantry crane. In the present invention, the output rod of the hydraulic cylinder can push the movable pull plate to slide outside the limiting movable rod, thereby compressing the compression main spring between the movable pull plate and the movable shaft seat, thereby improving the shock absorption effect during the movement. In addition, the cooperation between the movable pull plate and the limiting movable rod can help the connection between the hydraulic cylinder and the extension bracket to pass the dead point position. The present invention connects the end of the wire rope to a traction vehicle. When the traction vehicle tows the crane, the wire rope is pulled to move. After being guided by the guide cam, the wire rope pulls the brake seat to the side away from the brake disc, thereby enabling it to move normally. When the traction vehicle stops, the deceleration spring pushes the brake seat to fit the side of the brake disc. Since the brake disc is coaxially arranged with the rail wheel, the rail wheel can be quickly stopped by friction, preventing the inertia generated during traction from causing the crane to be unable to stop. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention in use state.

[0017] Figure 2 In the present invention Figure 1 A partial enlarged schematic diagram.

[0018] Figure 3 It is a schematic diagram of the position structure of the track-changing auxiliary wheel, the auxiliary lifting frame and the hydraulic lifting rod in the present invention.

[0019] Figure 4 In the present invention Figure 3 Another perspective of the picture.

[0020] Figure 5It is a schematic diagram of the three-dimensional structure of the hydraulic lifting rod in the present invention.

[0021] Figure 6 In the present invention Figure 5 A partial enlarged schematic diagram.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the brake in the present invention.

[0023] Figure 8 In the present invention Figure 7 Another perspective of the picture.

[0024] In the picture: Top frame-1, sliding frame-2, workpiece lifting frame-3, rack pull rod-4, supporting column-5, track wheel set-6, track change auxiliary wheel-7, turning frame-71, wheel frame-72, track wheel-73, auxiliary lifting frame-8, triangular shaft frame-81, extension bracket-82, offset shaft rod-83, hydraulic lifting rod-9, hydraulic cylinder-91, pin shaft seat-92, movable shaft seat-93, movable pull plate-94, limiting movable rod-95, auxiliary compression spring-96, compression main spring-97, brake-10, brake disc-101, fixed seat-102, brake seat-103, limiting rod-104, deceleration spring-105, guide cam-106. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] See also Figure 1-8 An embodiment of the present invention provides a gantry crane with a track change function, comprising a top frame 1, a support column 5 fixedly connected to the bottom of the top frame 1 in a rectangular array, a track wheel set 6 fixedly connected to the bottom of the support column 5 in a rectangular array, and an auxiliary lifting frame 8 movably connected to the end of the support column 5 away from the top frame 1, and a track change auxiliary wheel 7 movably connected to the other end of the auxiliary lifting frame 8; Among them, the auxiliary lifting frame 8 includes an extension bracket 82 with a U-shaped arrangement, one end of the extension bracket 82 is movably connected to a triangular axis frame 81, and the triangular axis frame 81 is fixedly connected to the side of the support column 5, and a hydraulic lifting rod 9 is also placed on the inner side of the extension bracket 82.

[0027] By adopting the above technical solution, the extension bracket 82 is pushed to flip downward by the output rod of the hydraulic lifting rod 9, so that the track-changing auxiliary wheel 7 at the end of the extension bracket 82 contacts the ground. After mutual cooperation, the supporting column 5 can be lifted up as a whole, and the track-changing auxiliary wheel 7 is used to change the track of the gantry crane as a whole, thereby increasing the range of movement of the gantry crane.

[0028] Furthermore, the hydraulic lifting rod 9 includes a hydraulic cylinder 91, one end of the hydraulic cylinder 91 is fixedly connected to a pin shaft seat 92, and the side of the triangular shaft frame 81 away from the extension bracket 82 is fixedly connected to a staggered shaft rod 83, and the staggered shaft rod 83 passes through the pin shaft seat 92 and is movably connected to the staggered shaft rod 83.

[0029] To be more specific, a movable pull plate 94 fixedly connected to the end of the hydraulic cylinder 91 is provided between the end of the hydraulic cylinder 91 away from the pin shaft seat 92 and the movable shaft seat 93, and a rectangular array of movable connection limiting movable rods 95 are provided in the movable pull plate 94, and an auxiliary compression spring 96 is sleeved on the outside of each of the limiting movable rods 95.

[0030] Furthermore, one end of the limiting movable rod 95 is fixedly connected to the movable shaft seat 93, and the other end passes through the movable pull plate 94 and is threadedly connected to a locking bolt. The auxiliary compression spring 96 is located between the movable shaft seat 93 and the movable pull plate 94, and a compression main spring 97 is also fixedly connected between the movable shaft seat 93 and the movable pull plate 94.

[0031] Furthermore, the hydraulic cylinder 91 is located inside the extension bracket 82 , and the movable shaft seat 93 is movably connected to one end of the extension bracket 82 away from the triangular shaft bracket 81 , and the triangular shaft bracket 81 is fixedly connected to the side of the support column 5 .

[0032] By adopting the above technical solution, since the extension bracket 82 is arranged in a U-shape as a whole and the hydraulic cylinder 91 is located on the inner side of the extension bracket 82, when the connection between the extension bracket 82 and the hydraulic cylinder 91 passes the dead point position, the gantry crane can be stably lifted, and the structure can be stored without changing the track, thereby not affecting the normal movement of the two sides of the gantry crane.

[0033] Furthermore, the track-changing auxiliary wheel 7 includes a flip frame 71 movably connected to the end of the extension bracket 82, the bottom of the flip frame 71 is movably connected to the wheel frame 72 through a pin, and each of the wheel frames 72 is movably connected to a rail wheel 73 at both ends.

[0034] Furthermore, a sliding frame 2 is movably connected to the top of the top frame 1, and both ends of the sliding frame 2 are transmission-matched with rack rods 4, and the bottom of the rack rod 4 is fixedly connected to a workpiece lifting frame 3.

[0035] By adopting the above-mentioned technical solution, the output rod of the hydraulic cylinder 91 can push the movable pull plate 94 to slide on the outside of the limiting movable rod 95, thereby compressing the compression main spring 97 between the movable pull plate 94 and the movable shaft seat 93, thereby improving the shock absorption effect during the movement process. Moreover, through the mutual cooperation between the movable pull plate 94 and the limiting movable rod 95, the connection between the hydraulic cylinder 91 and the extension bracket 82 can be helped to pass the dead point position.

[0036] A brake 10 is also installed on the side of the auxiliary lifting frame 8. The brake 10 includes a brake disc 101 coaxially arranged with the rail wheel 73, and the brake disc 101 is fixedly connected to the end of the rail wheel 73; The brake 10 further includes a fixing seat 102 fixedly connected to the side of the wheel frame 72 , and a brake seat 103 is provided between the fixing seat 102 and the brake disc 101 , and a limit rod 104 is symmetrically fixedly connected to one side of the brake seat 103 close to the fixing seat 102 .

[0037] The outer side of the limiting rod 104 is sleeved with a deceleration spring 105 , and the deceleration spring 105 is located between the fixing seat 102 and the brake seat 103 , and the end of the limiting rod 104 away from the brake seat 103 passes through the fixing seat 102 .

[0038] The fixing seat 102 is also provided with a mounting groove, and a guide concave wheel 106 is movably connected in the mounting groove. The side of the brake seat 103 is fixedly connected with a steel wire rope, and the other end of the steel wire rope passes around the guide concave wheel 106 in the mounting groove and extends to a side away from the fixing seat 102.

[0039] During daily use, it is necessary to strengthen the inspection, maintenance and care of various components, especially the springs. When the springs undergo elastic fatigue or elastic deformation and are insufficient to achieve the locking function, they need to be replaced in time.

[0040] The working principle of the present invention is as follows: when in use, first the output rod of the hydraulic cylinder 91 pushes the extension bracket 82 to flip outward with the triangular axis frame 81 as the axis. When the connection between the hydraulic cylinder 91 and the extension bracket 82 passes the dead point position, the output rod of the hydraulic cylinder 91 contracts inward. At this time, the end of the extension bracket 82 will continue to move downward, so that the bottom of the track-changing auxiliary wheel 7 will contact the ground, and then the auxiliary lifting frame 8 and the hydraulic lifting rod 9 will cooperate with each other to lift the top frame 1 and the supporting column 5 from the track. Then, the traction rope is used to connect the tractor to the crane, and the end of the wire rope is connected to the tractor. When the traction vehicle pulls the crane, The steel wire rope is pulled to move, and after being guided by the guide cam 106, the steel wire rope pulls the brake seat 103 to the side away from the brake disc 101, so that it can move normally. When the traction vehicle stops, the deceleration spring 105 will push the brake seat 103 to fit the side of the brake disc 101. Since the brake disc 101 is coaxially arranged with the rail wheel 73, the friction force is used to stop the crane quickly to prevent the inertia generated during traction from causing a collision. The gantry crane is moved as a whole until it moves above another track. Finally, the extension bracket 82 is stored through the hydraulic lifting rod 9. It has a simple structure, is very convenient to operate, and effectively reduces the labor intensity.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A gantry crane with track changing function, characterized by: The invention comprises a top frame (1), a support column (5) is fixedly connected to the bottom of the top frame (1) in a rectangular array, a track wheel set (6) is fixedly connected to the bottom of the support column (5) in a rectangular array, and an auxiliary lifting frame (8) is movably connected to the end of the support column (5) away from the top frame (1), and the other end of the auxiliary lifting frame (8) is movably connected to the track-changing auxiliary wheel (7); The auxiliary lifting frame (8) includes a U-shaped extension bracket (82), one end of the extension bracket (82) is movably connected to a triangular axis bracket (81), and the triangular axis bracket (81) is fixedly connected to the side of the supporting column (5), and a hydraulic lifting rod (9) is also placed on the inner side of the extension bracket (82).

2. The gantry crane with track change function according to claim 1, characterized in that: The hydraulic lifting rod (9) includes a hydraulic cylinder (91), one end of the hydraulic cylinder (91) is fixedly connected to a pin shaft seat (92), and the side of the triangular shaft frame (81) away from the extension bracket (82) is fixedly connected to a staggered shaft rod (83), and the staggered shaft rod (83) passes through the pin shaft seat (92) and is movably connected to the staggered shaft rod (83).

3. The gantry crane with track change function according to claim 2, characterized in that: A movable pull plate (94) fixedly connected to the end of the hydraulic cylinder (91) is provided between the end of the hydraulic cylinder (91) away from the pin seat (92) and the movable shaft seat (93), and a rectangular array of movable limit rods (95) are movably connected in the movable pull plate (94), and an auxiliary compression spring (96) is sleeved on the outer side of each of the movable limit rods (95).

4. The gantry crane with track change function according to claim 3, characterized in that: One end of the limiting movable rod (95) is fixedly connected to the movable shaft seat (93), and the other end passes through the movable pull plate (94) and is threadedly connected to a locking bolt. The auxiliary compression spring (96) is located between the movable shaft seat (93) and the movable pull plate (94), and a compression main spring (97) is also fixedly connected between the movable shaft seat (93) and the movable pull plate (94).

5. The gantry crane with track change function according to claim 4, characterized in that: The hydraulic cylinder (91) is located inside the extension bracket (82), and the movable shaft seat (93) is movably connected to one end of the extension bracket (82) away from the triangular shaft bracket (81), and the triangular shaft bracket (81) is fixedly connected to the side of the support column (5).

6. The gantry crane with track-changing function according to claim 5, characterized in that: The track-changing auxiliary wheel (7) comprises a turning frame (71) movably connected to the end of the extension bracket (82); the bottom of the turning frame (71) is movably connected to the wheel frame (72) via a pin shaft, and each of the wheel frames (72) is movably connected to a rail wheel (73) at both ends.

7. The gantry crane with track change function according to claim 6, characterized in that: The top of the top frame (1) is movably connected to a sliding frame (2), both ends of the sliding frame (2) are transmission-matched with rack pull rods (4), and the bottom of the rack pull rod (4) is fixedly connected to a workpiece lifting frame (3).

8. The gantry crane with track-changing function according to claim 7, characterized in that: A brake (10) is also installed on the side of the auxiliary lifting frame (8), and the brake (10) includes a brake disc (101) arranged coaxially with the rail wheel (73), and the brake disc (101) is fixedly connected to the end of the rail wheel (73); The brake (10) further comprises a fixing seat (102) fixedly connected to the side of the wheel frame (72), and a brake seat (103) is provided between the fixing seat (102) and the brake disc (101), and a limiting rod (104) is symmetrically fixedly connected to one side of the brake seat (103) close to the fixing seat (102).

9. The gantry crane with track-changing function according to claim 8, characterized in that: The outer side of the limiting rod (104) is sleeved with a deceleration spring (105), and the deceleration spring (105) is located between the fixing seat (102) and the brake seat (103), and the end of the limiting rod (104) away from the brake seat (103) passes through the fixing seat (102).

10. The gantry crane with track-changing function according to claim 9, characterized in that: The fixing seat (102) is also provided with a mounting groove, and a guide concave wheel (106) is movably connected in the mounting groove. A steel wire rope is fixedly connected to the side of the brake seat (103), and the other end of the steel wire rope passes around the guide concave wheel (106) in the mounting groove and extends to a side away from the fixing seat (102).

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