Height-adjustable gantry crane with electric hoist

Abstract

The utility model relates to the technical field of portal cranes, and particularly discloses a height-adjustable electric hoist portal crane which comprises a ground track, a running mechanism, a track beam and an electric hoist, the adjusting base comprises a cylindrical box fixedly connected to the top face of the running mechanism, a shaft rod with the two ends rotationally arranged in the middles of the top ends of the front wall and the rear wall of the cylindrical box in a sleeving mode, gears fixedly arranged at the two ends of the shaft rod in a sleeving mode, and a lifting motor with a power output shaft fixedly connected with the front end of the shaft rod in a butt joint mode. The lifting seat is slidably sleeved in the cylindrical box body, the middle of the cylindrical box body is provided with a middle vertical groove which is slidably clamped with the shaft rod along the vertical direction, the middle parts of the front and rear walls of the lifting seat, corresponding to the gear, are respectively provided with a side groove along the vertical direction, and one side wall of each side groove is fixedly provided with a rack meshed with the gear; the bottom ends of the side frames are fixedly connected to the top of the lifting seat; the end seats are fixed to the tops of the side frames. The two ends of the track beam are fixed to the tops of the end seats correspondingly. Therefore, the working height of the gantry crane with the electric hoist can be flexibly adjusted.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane technology, specifically a height-adjustable electric hoist gantry crane. Background Technology

[0002] Gantry cranes are lifting equipment widely used in industrial fields. They generally consist of a bridge frame supported by two outriggers on both sides, moving on ground rails. Structurally, they are composed of a gantry frame, a traveling mechanism, a lifting trolley, and ground rails. The lifting trolley often uses an electric hoist.

[0003] Currently, the height of the gantry crane in commonly used electric hoist gantry cranes is generally fixed, which makes it difficult to adjust the working height of the crane, resulting in poor adaptability and inability to meet the working height requirements of gantry cranes at different work locations. Utility Model Content

[0004] The purpose of this utility model is to provide a height-adjustable electric hoist gantry crane to solve the problem that the working height of current electric hoist gantry cranes is difficult to adjust flexibly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable electric hoist gantry crane, comprising a pair of ground rails, a running mechanism traveling along the ground rails, a rail beam, and an electric hoist traveling along the rail beam. The adjusting base includes a cylindrical box fixedly connected at its bottom end to the middle of the top surface of the running mechanism, a shaft rotatably fitted at both ends to the middle of the top ends of the front and rear walls of the cylindrical box, gears fixedly fitted near the ends of the shafts, and a lifting motor fixedly fitted to the front wall of the cylindrical box with its power output shaft fixedly connected to the front end of the shaft. The lifting seat is slidably fitted into the cylindrical box. The middle of the cylindrical box is provided with a central vertical groove that slides vertically with the shaft. The middle of the front and rear walls of the lifting seat is provided with side grooves vertically corresponding to the positions of the gears. A rack meshing with the gear is fixed to one side wall of each side groove. The bottom end of the side frame is fixedly connected to the top of the lifting seat. The end seat is fixed to the top of the side frame, and both ends of the rail beam are fixed to the top of the end seat.

[0006] Preferably, the inner cavity of the cylindrical box is equipped with limiting components at the top center of the front and rear walls, which can lock the rack.

[0007] Preferably, the limiting component includes an L-shaped plate fixed to the middle of the top of the front and rear walls of the cylindrical box cavity, a locking tooth disposed on the outside of the vertical plate of the L-shaped plate and corresponding to the rack, a limiting bolt rotatably fitted on the inner side wall of the locking tooth and threadedly connected to the vertical plate of the L-shaped plate, and a guide rod fixed on the inner side wall of the locking tooth and slidably connected to the L-shaped plate.

[0008] Preferably, the middle sections of the two side walls of the cylindrical box cavity are respectively fixed with guide rails along the vertical direction, and the two side walls of the lifting seat are respectively provided with slots that slide and engage with the guide rails along the vertical direction.

[0009] Preferably, the top surface of the operating mechanism is provided with a rectangular groove that is directly opposite to the bottom end of the inner cavity of the cylindrical box and is slidably fitted to the bottom of the lifting seat.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model relates to a height-adjustable electric hoist gantry crane, which can flexibly adjust the vertical movement distance of the lifting seat relative to the adjusting base through a gear and rack meshing transmission mechanism, thereby effectively solving the problem of the difficulty in flexibly adjusting the working height of the electric hoist gantry crane. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0013] Figure 2 This is a three-dimensional structural diagram of the walking mechanism of this utility model;

[0014] Figure 3 This is a three-dimensional structural diagram of the adjusting base of this utility model;

[0015] Figure 4 This is a three-dimensional structural diagram of the limiting component of this utility model;

[0016] Figure 5 This is a three-dimensional structural diagram of the lifting seat of this utility model;

[0017] Figure 6 This is a three-dimensional structural diagram of the side frame of this utility model;

[0018] Figure 7 This is a three-dimensional structural diagram of the end seat of this utility model.

[0019] In the diagram: 1 - Ground track;

[0020] 2-Running mechanism; 2.1-Rectangular groove;

[0021] 3-Rail beam;

[0022] 4-Electric hoist;

[0023] 5-Adjustable base; 5.1-Cylindrical housing; 5.2-Shaft; 5.3-Gear; 5.4-Lifting motor; 5.5-Guide rail; 5.6-Limiting component; 5.6.1-L-shaped plate; 5.6.2-Clamping teeth; 5.6.3-Limiting bolt; 5.6.4-Guide rod;

[0024] 6-Lifting seat; 6.1-Side groove; 6.2-Rack; 6.3-Central vertical groove; 6.4-Slot;

[0025] 7-Side frame;

[0026] 8-End seat. Detailed Implementation

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-7 This utility model provides a technical solution: a height-adjustable electric hoist gantry crane, including a pair of ground rails 1, a running mechanism 2 that travels along the ground rails 1, a rail beam 3, and an electric hoist 4 that travels along the rail beam 3. The ground rails 1 are I-shaped rails fixed on the ground. The running mechanism 2 includes a housing, traveling wheels that are installed inside the housing and roll along the ground rails 1, and a power device that drives the traveling wheels to rotate. In addition, a rectangular groove 2.1 is provided in the middle of the top surface of the housing of the running mechanism 2.

[0029] The adjusting base 5 includes a cylindrical housing 5.1 with its bottom fixedly connected to the center of the top surface of the running mechanism 2 and directly opposite the rectangular groove 2.1; shafts 5.2 rotatably mounted at both ends on the center of the top of the front and rear walls of the cylindrical housing 5.1; gears 5.3 fixedly mounted on the shafts 5.2 near both ends; and a lifting motor 5.4 fixed to the front wall of the cylindrical housing 5.1 with its power output shaft fixedly connected to the front end of the shaft 5.2. The bottom of the cylindrical housing 5.1 is fixedly connected to the top surface of the traveling mechanism 2 using bolts. Both lifting motors 5.4 are servo motors, employing a dual-motor master-slave control + encoder feedback control method to ensure high-precision synchronous operation of the two motors.

[0030] The lifting seat 6 is slidably fitted inside the cylindrical housing 5.1. The cylindrical housing 5.1 has a central vertical groove 6.3 in the middle, which slides and engages with the shaft 5.2 vertically. The front and rear walls of the lifting seat 6 have side grooves 6.1 in the middle, corresponding to the position of the gear 5.3, respectively. A rack 6.2 that meshes with the gear 5.3 is fixed to one side wall of the side groove 6.1. The bottom end of the lifting seat 6 is slidably fitted into the rectangular groove 2.1.

[0031] The bottom end of the side frame 7 is bolted to the top of the lifting seat 6. The end seat 8 is fixed to the top of the side frame 7, and both ends of the rail beam 3 are fixed to the top of the end seat 8.

[0032] In summary, when the overall working height of the gantry crane needs to be adjusted, the lifting motors 5.4 on both sides should be started simultaneously. The lifting motors 5.4 drive the gears 5.3 to rotate through the shafts 5.2. The gears 5.3 mesh with the corresponding racks 6.2, thereby driving the lifting seats 6 on both sides to move up and down within the cylindrical housing 5.1, thus achieving flexible adjustment of the working height of the gantry crane.

[0033] To prevent relative slippage between the lifting seat 6 and the adjusting base 5 after the working height is adjusted, limiting components 5.6 are installed at the top center of the front and rear walls of the cylindrical housing 5.1 to lock the rack 6.2. The limiting component 5.6 includes an L-shaped plate 5.6.1 fixed to the top center of the front and rear walls of the cylindrical housing 5.1, a locking tooth 5.6.2 located on the outside of the vertical plate of the L-shaped plate 5.6.1 and corresponding to the rack 6.2, a limiting bolt 5.6.3 rotatably fitted onto the inner wall of the locking tooth 5.6.2 and threadedly connected to the vertical plate of the L-shaped plate 5.6.1, and a guide rod 5.6.4 fixed to the inner wall of the locking tooth 5.6.2 and slidably fitted onto the L-shaped plate 5.6.1. That is, after the working height is adjusted, rotating the limiting bolt 5.6.3 causes the locking tooth 5.6.2 to lock onto the corresponding tooth surface of the rack 6.2, thus limiting and preventing slippage.

[0034] To ensure smoother vertical movement of the lifting seat 6 within the cylindrical housing 5.1, guide rails 5.5 are vertically fixed to the middle sections of both sides of the inner cavity of the cylindrical housing 5.1. The lifting seat 6 also has slots 6.4 on both sides that slide vertically into the guide rails 5.5. That is, when the lifting seat 6 moves vertically within the cylindrical housing 5.1, the guide rails 5.5 and slots 6.4 slide relative to each other, providing guidance.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable electric hoist gantry crane, comprising paired ground rails (1), a running mechanism (2) traveling along the ground rails (1), a rail beam (3), and an electric hoist (4) traveling along the rail beam (3), characterized in that, Also includes: Adjustment base (5), the adjustment base (5) includes a cylindrical box (5.1) whose bottom end is fixedly connected to the middle of the top surface of the running mechanism (2), a shaft (5.2) whose two ends are rotatably fitted on the middle of the top end of the front and rear walls of the cylindrical box (5.1), a gear (5.3) fixedly fitted on the shaft (5.2) near both ends, and a lifting motor (5.4) fixed to the front wall of the cylindrical box (5.1) and whose power output shaft is fixedly connected to the front end of the shaft (5.2); The lifting seat (6) is slidably fitted inside the cylindrical box (5.1). The cylindrical box (5.1) has a central vertical groove (6.3) in the middle that slides and engages with the shaft (5.2) in the vertical direction. The lifting seat (6) has side grooves (6.1) in the middle of the front and rear walls corresponding to the position of the gear (5.3) in the vertical direction. A rack (6.2) that meshes with the gear (5.3) is fixed on one side wall of the side groove (6.1). Side frame (7), the bottom end of which is fixedly connected to the top of the lifting seat (6); End seat (8), the end seat (8) is fixed to the top of the side frame (7), and both ends of the rail beam (3) are respectively fixed to the top of the end seat (8).

2. The height-adjustable electric hoist gantry crane according to claim 1, characterized in that: The cylindrical box (5.1) has limiting members (5.6) installed at the top center of the front and rear walls of the inner cavity, which can lock the rack (6.2).

3. The height-adjustable electric hoist gantry crane according to claim 2, characterized in that: The limiting component (5.6) includes an L-shaped plate (5.6.1) fixed to the middle of the top of the front and rear walls of the inner cavity of the cylindrical box (5.1), a locking tooth (5.6.2) disposed on the outside of the vertical plate of the L-shaped plate (5.6.1) and corresponding to the rack (6.2), a limiting bolt (5.6.3) rotatably fitted on the inner side wall of the locking tooth (5.6.2) and threadedly connected to the vertical plate of the L-shaped plate (5.6.1), and a guide rod (5.6.4) fixed on the inner side wall of the locking tooth (5.6.2) and slidably connected to the L-shaped plate (5.6.1).

4. The height-adjustable electric hoist gantry crane according to claim 1, characterized in that: The inner walls of the cylindrical box (5.1) are respectively fixed with guide rails (5.5) in the middle of the two sides. The lifting seat (6) is provided with slots (6.4) on both sides that slide and engage with the guide rails (5.5) in the vertical direction.

5. A height-adjustable electric hoist gantry crane according to claim 1, characterized in that: The operating mechanism (2) has a rectangular groove (2.1) in the middle of its top surface that is directly opposite to the bottom of the inner cavity of the cylindrical box (5.1) and is slidably fitted to the bottom of the lifting seat (6).

Images