Variable amplitude positioning device for gantry crane

Abstract

The utility model discloses a variable-amplitude positioning device for a gantry crane, which belongs to the technical field of harbor machinery and is characterized in that a rotating mechanism comprises an outer gear ring, a gear and a motor, the outer gear ring is fixedly sleeved on the outer wall of a fixed ring, an upper rotating ring is in running fit with the outer wall of the upper end of the fixed ring, and a lower rotating ring is sleeved on the gear. The lower rotating ring is rotationally matched with the lower end outer wall of the fixed ring; the upper rotating ring is connected with the inner end of the upper connecting plate, the lower rotating ring is connected with the inner end of the lower connecting plate, the outer end of the upper connecting plate and the outer end of the lower connecting plate are connected with the induction magnets through the rotary reset mechanisms respectively, the positions from the two induction magnets to the circle center of the fixing ring are the same, and the heights of the two induction magnets are the same. And the magnetic induction limit switch is connected with a rotary column of the gantry crane through a connecting frame and is placed above the induction magnet. Compared with the prior art, the material grabbing and discharging device has the characteristic of improving the material grabbing and discharging precision.

Description

Technical Field

[0001] The utility model relates to the technical field of port machinery, in particular to a luffing positioning device for a portal crane. Background Art

[0002] At present, gantry cranes have become the main force in port production operations with their excellent lifting capacity and efficient working performance. The main way for gantry cranes to unload ships is to grab the cargo from each cabin of the ship one by one through the grab bucket they are equipped with, and then place it on the yard in front of the berth. Afterwards, the loader shovels the cargo into the dump truck, and finally transports it to the yard for storage. However, although this traditional unloading method meets production needs to a certain extent, it has many shortcomings that cannot be ignored.

[0003] First, this unloading method involves multiple transshipments, which significantly increases the cost of transshipment, which not only affects the economic benefits of the enterprise, but also increases the complexity and uncertainty of the production process. Secondly, the noise and dust pollution generated by frequent loading and unloading operations have a serious impact on the surrounding environment, which is contrary to the environmental protection concept of modern society. In addition, since it involves high-altitude operations and heavy machinery operations, the safety risks are relatively high. Once an accident occurs, the consequences will be disastrous.

[0004] In order to change this situation, ports began to try to use hopper unloading. This new unloading method reduces the transshipment link by optimizing the operation process, thereby reducing the transshipment cost. At the same time, due to the reduction in the number of loading and unloading times, the environmental pollution problem has also been effectively alleviated. However, as the utilization rate of hoppers continues to increase, some safety issues have gradually been exposed.

[0005] During the hopper operation, the operator needs to strictly control the spreading range of the gantry crane to ensure that the goods can fall accurately into the hopper. A slight deviation may cause the goods to be scattered outside the hopper, which will not only waste resources but also cause safety hazards. Especially during night operations, due to poor visibility and lack of concentration of operators, this risk is magnified. Utility Model Content

[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and to provide a luffing positioning device for a portal crane, so as to improve the accuracy of material grabbing and material discharging.

[0007] The utility model provides a variable amplitude positioning device for a portal crane, which is characterized in that it includes a fixed ring, a rotating mechanism, an upper rotating ring, a lower rotating ring, a magnetic induction limit switch and an induction magnet. The rotating mechanism includes an outer gear ring, a gear and an electric motor. The outer wall of the fixed ring is fixedly sleeved with an outer gear ring. The upper rotating ring is rotatably matched with the upper end outer wall of the fixed ring, and the lower rotating ring is rotatably matched with the lower end outer wall of the fixed ring. The upper rotating ring is connected to the inner end of the upper connecting plate, the lower rotating ring is connected to the inner end of the lower connecting plate, and the outer ends of the upper connecting plate and the lower connecting plate are respectively connected to the induction magnet through a rotating reset mechanism. The two induction magnets are at the same position from the center of the fixed ring, and the two induction magnets are at the same height; the upper connecting plate and the lower connecting plate are respectively provided with through holes, the upper end face of the upper connecting plate is provided with a motor, the shaft of the motor passes through the through hole of the upper connecting plate and is fixedly connected to the upper gear, the lower end face of the lower connecting plate is provided with a motor, the shaft of the motor passes through the through hole of the lower connecting plate and is fixedly connected to the lower gear, the upper gear and the lower gear are respectively meshed with the outer gear ring, and the upper gear is installed above the lower gear; the magnetic induction limit switch is connected to the rotating column of the portal crane through a connecting frame, and the magnetic induction limit switch is placed above the induction magnet.

[0008] Furthermore, the fixing ring is formed by correspondingly splicing two halves of the fixing ring, the two halves of the fixing ring are connected by a first connecting plate, the upper and lower ends of the connecting position of the two halves of the fixing ring are respectively provided with grooves corresponding to the first connecting plate, the first connecting plate is placed in the grooves of the two halves of the fixing ring, the first connecting plate is provided with a connecting hole, the two halves of the fixing ring are provided with corresponding threaded blind holes, the bolts pass through the connecting holes on the first connecting plate and respectively cooperate with the threaded blind holes on the two halves of the fixing ring, so that the two halves of the fixing ring are spliced ​​into a complete fixing ring.

[0009] Furthermore, the upper rotating ring and the lower rotating ring are respectively formed by splicing two half connecting rings, and the two half connecting rings are connected by a second connecting plate. A groove is provided on the outer end wall of the two half connecting rings, and the second connecting plate is installed in the groove of the half connecting ring. A connecting hole is provided on the second connecting plate, and corresponding threaded blind holes are provided on the two half connecting rings. Bolts pass through the connecting holes on the second connecting plate and respectively cooperate with the threaded blind holes on the half connecting rings to splice the two half connecting rings into a complete connecting ring.

[0010] Furthermore, the outer gear ring is formed by correspondingly splicing two half gear rings, and the two half gear rings are connected by a third connecting plate. The upper and lower ends of the connection position of the two half gear rings are respectively provided with grooves corresponding to the third connecting plate. The third connecting plate is placed in the grooves of the two half gear rings. The third connecting plate is provided with a connecting hole, and the two half gear rings are provided with corresponding threaded blind holes. Bolts pass through the connecting holes on the third connecting plate and respectively cooperate with the threaded blind holes on the two half gear rings to splice the two half gear rings into a complete outer gear ring.

[0011] Furthermore, the rotary reset mechanism includes a rotating shaft, a bending spring and an arc-shaped slider, one end of the upper connecting plate and the lower connecting plate are respectively provided with an arc-shaped slide groove, a mounting through hole is provided at the center of the arc-shaped slide groove, the lower end of the rotating shaft is rotatably connected to the mounting through hole through a bearing, a shaft ring is provided on the rotating shaft, an arc-shaped slider is fixedly installed on the lower end surface of the shaft ring, the arc-shaped slider is placed in the arc-shaped slide groove, and slides with the arc-shaped slide groove; two bending springs are symmetrically installed in the arc-shaped slide groove, one end of the bending spring is connected to the end wall of the arc-shaped slide groove, and the other end is against one end of the arc-shaped slider; the upper connecting plate is connected to the inner end of the support plate through the rotating shaft, the outer end of the support plate is connected to the induction magnet, the lower connecting plate is connected to the outer end of the support plate through the rotating shaft, and the inner end of the support plate is connected to the induction magnet.

[0012] Compared with the prior art, the utility model has the following outstanding beneficial effects:

[0013] 1. In the utility model, one of the induction magnets is adjusted to the material grabbing position, and the other induction magnet is adjusted to the funnel position. When the magnetic induction limit switch moves to the induction magnet position, the alarm sounds an alarm to remind the operator that the portal crane has rotated to the material grabbing or material discharging position, thereby improving the accuracy of material grabbing and material discharging;

[0014] 2. The upper connecting plate and the lower connecting plate of the utility model are respectively connected to the induction magnet through a rotary reset mechanism. When one support plate in the rotary reset mechanism rotates around the fixed ring and hits the other support plate, the two support plates squeeze each other and rotate, thereby avoiding mutual interference between the two support plates and hindering movement. During the self-rotation process, the support plate drives the rotating shaft connected to it to rotate and compresses the bending spring. When the two support plates lose contact, the bending spring resets, driving the support plate to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 It is a top view of the utility model;

[0018] Figure 4 yes Figure 2 Cross-sectional view of the AA section;

[0019] Figure 5 yes Figure 4 A magnified view of part B;

[0020] Figure 6 It is a structural schematic diagram of the outer gear ring part of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figures 1 to 3 As shown, the utility model comprises a fixed ring 1, a rotating mechanism 2, an upper rotating ring 3, a lower rotating ring 5, a magnetic induction limit switch and an induction magnet.

[0023] The rotating mechanism 2 includes an outer gear ring 23, a gear 21 and a motor 22. The outer gear ring 23 is fixedly sleeved on the outer wall of the fixed ring 1. The upper rotating ring 3 rotates with the upper outer wall of the fixed ring 1, and the lower rotating ring 5 rotates with the lower outer wall of the fixed ring 1.

[0024] In the optimized solution, a threaded blind hole is provided at the lower end of the fixing ring 1.

[0025] The upper rotating ring 3 is connected to the inner end of the upper connecting plate 4, and the outer end of the upper connecting plate 4 is connected to the induction magnet through a rotating reset mechanism 7. The lower rotating ring 5 is connected to the inner end of the lower connecting plate 6, and the outer end of the lower connecting plate 6 is connected to the induction magnet through a rotating reset mechanism 7. The two induction magnets are at the same position from the center of the fixed ring 1, and the two induction magnets are at the same height.

[0026] The upper connecting plate 4 and the lower connecting plate 6 are respectively provided with through holes, and the upper end surface of the upper connecting plate 4 is mounted with a motor 22, and the shaft of the motor 22 passes through the through hole of the upper connecting plate 4 and is fixedly connected to the upper gear 21, and the lower end surface of the lower connecting plate 6 is mounted with a motor 22, and the shaft of the motor 22 passes through the through hole of the lower connecting plate 6 and is fixedly connected to the lower gear 21, and the upper gear 21 and the lower gear 21 are respectively meshed with the outer gear ring 23, and the upper gear 21 is mounted above the lower gear 21, and the two gears 21 can rotate around the outer gear ring 23 without interfering with each other.

[0027] In the optimization scheme, the fixed ring 1, the outer gear ring 23, the upper rotating ring 3 and the lower rotating ring 5 are respectively formed by splicing two half-ring structures, and the fixed ring 1 is formed by correspondingly splicing two half fixed rings 11, and the two half fixed rings 11 are connected by a first connecting plate 12, and the upper and lower ends of the connection positions of the two half fixed rings 11 are respectively provided with grooves corresponding to the first connecting plate 12, and the first connecting plate 12 is placed in the grooves of the two half fixed rings 11, and the first connecting plate 12 is provided with connecting holes, and the two half fixed rings 11 are provided with corresponding threaded blind holes, and the bolts pass through the connecting holes on the first connecting plate 12 and respectively cooperate with the threaded blind holes on the two half fixed rings 11 to splice the two half fixed rings 11 into a complete fixed ring 1.

[0028] The upper rotating ring 3 and the lower rotating ring 5 are respectively formed by splicing two half connecting rings, and the two half connecting rings are connected by a second connecting plate. A groove is provided on the outer end wall of the two half connecting rings, and the second connecting plate is installed in the groove of the half connecting ring. A connecting hole is provided on the second connecting plate, and corresponding threaded blind holes are provided on the two half connecting rings. Bolts pass through the connecting holes on the second connecting plate and respectively cooperate with the threaded blind holes on the half connecting rings to splice the two half connecting rings into a complete connecting ring.

[0029] like Figure 6 As shown, the outer gear ring 23 is formed by correspondingly splicing two half gear rings 231, and the two half gear rings 231 are connected by a third connecting plate 232. The upper and lower ends of the connection position of the two half gear rings 231 are respectively provided with grooves corresponding to the third connecting plate 232. The third connecting plate 232 is placed in the grooves of the two half gear rings 231. The third connecting plate 232 is provided with connecting holes, and the two half gear rings 231 are provided with corresponding threaded blind holes. Bolts pass through the connecting holes on the third connecting plate 232 and are respectively threadedly matched with the threaded blind holes on the two half gear rings 231 to splice the two half gear rings 231 into a complete outer gear ring 23.

[0030] like Figure 4 and 5 As shown, the rotary reset mechanism 7 includes a rotating shaft 72, a bending spring 73 and an arc-shaped slider 74. An arc-shaped slide groove is provided at one end of the upper connecting plate 4 and the lower connecting plate 6 respectively. A mounting through hole is provided at the center of the arc-shaped slide groove. The lower end of the rotating shaft 72 is rotatably connected to the mounting through hole through a bearing. A shaft ring is provided on the rotating shaft 72. An arc-shaped slider 74 is fixedly installed on the lower end surface of the shaft ring. The arc-shaped slider 74 is placed in the arc-shaped slide groove and slidably cooperates with the arc-shaped slide groove.

[0031] Two bending springs 73 are symmetrically installed in the arc-shaped slide groove, one end of the bending spring 73 is connected to the end wall of the arc-shaped slide groove, and the other end is pressed against one end of the arc-shaped slider 74. When the rotating shaft 72 rotates, it can drive the arc-shaped slider 74 to rotate, thereby compressing the bending spring 73.

[0032] The upper connecting plate 4 is connected to the inner end of the support plate 71 through the rotating shaft 72, and the outer end of the support plate 71 is connected to the induction magnet. The lower connecting plate 6 is connected to the outer end of the support plate 71 through the rotating shaft 72, and the inner end of the support plate 71 is connected to the induction magnet. When one of the support plates 71 rotates around the fixed ring 1 and hits the other support plate 71, the two support plates 71 squeeze each other and rotate, thereby avoiding the two support plates 71 from interfering with each other and hindering movement. During the self-rotation process, the support plate 71 drives the rotating shaft 72 connected to it to rotate, compressing the bending spring 73.

[0033] The magnetic induction limit switch is connected to the rotating column of the portal crane through a connecting frame, and the magnetic induction limit switch is placed above the induction magnet.

[0034] The magnetic induction limit switch is connected to the alarm through a circuit, and the alarm is placed in the portal crane room. The circuit is a prior art, and its specific structure is not repeated. When the magnetic induction limit switch moves to the induction magnet position, the alarm sounds an alarm to remind the operator that the portal crane has rotated to a specified position.

[0035] The operation process is as follows: when using the utility model, the fixing ring 1 is sleeved on the outside of the cylindrical gantry of the gantry crane, and the fixing ring 1 is fixed to the upper end of the flange of the cylindrical gantry with bolts, and the motor 22 is started. The motor 22 drives the gear 21 to rotate, and the gear 21 rotates around the outer ring gear 23, thereby rotating the induction magnet to the specified position. When the magnetic induction limit switch moves to the position of the induction magnet, the alarm sounds an alarm to remind the operator that the gantry crane has rotated to the specified position.

[0036] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A luffing positioning device for a portal crane, characterized in that: The invention comprises a fixed ring (1), a rotating mechanism (2), an upper rotating ring (3), a lower rotating ring (5), a magnetic induction limit switch and an induction magnet. The rotating mechanism (2) comprises an outer gear ring (23), a gear (21) and an electric motor (22). The outer wall of the fixed ring (1) is fixedly sleeved with an outer gear ring (23). The upper rotating ring (3) is rotatably matched with the upper outer wall of the fixed ring (1), and the lower rotating ring (5) is rotatably matched with the lower outer wall of the fixed ring (1). The upper rotating ring (3) is connected to the inner end of an upper connecting plate (4), and the lower rotating ring (5) is connected to the inner end of a lower connecting plate (6). The outer ends of the upper connecting plate (4) and the lower connecting plate (6) are respectively connected to the induction magnet via a rotating reset mechanism (7). The two induction magnets are connected to the circular ring of the fixed ring (1). The center positions are the same, and the two induction magnets are at the same height; the upper connecting plate (4) and the lower connecting plate (6) are respectively provided with through holes, the upper end surface of the upper connecting plate (4) is provided with a motor (22), the shaft of the motor (22) passes through the through hole of the upper connecting plate (4) and is fixedly connected to the upper gear (21), the lower end surface of the lower connecting plate (6) is provided with a motor (22), the shaft of the motor (22) passes through the through hole of the lower connecting plate (6) and is fixedly connected to the lower gear (21), the upper gear (21) and the lower gear (21) are respectively meshed with the outer gear ring (23), and the upper gear (21) is installed above the lower gear (21); the magnetic induction limit switch is connected to the rotating column of the portal crane through a connecting frame, and the magnetic induction limit switch is placed above the induction magnet.

2. The luffing positioning device for a portal crane according to claim 1, characterized in that: The fixing ring (1) is formed by correspondingly splicing two halves of the fixing ring (11). The two halves of the fixing ring (11) are connected by a first connecting plate (12). The upper and lower ends of the connection position of the two halves of the fixing ring (11) are respectively provided with grooves corresponding to the first connecting plate (12). The first connecting plate (12) is placed in the grooves of the two halves of the fixing ring (11). The first connecting plate (12) is provided with a connecting hole. The two halves of the fixing ring (11) are provided with corresponding threaded blind holes. Bolts pass through the connecting holes on the first connecting plate (12) and are respectively threadedly matched with the threaded blind holes on the two halves of the fixing ring (11), so that the two halves of the fixing ring (11) are spliced ​​into a complete fixing ring (1).

3. The luffing positioning device for a portal crane according to claim 1, characterized in that: The upper rotating ring (3) and the lower rotating ring (5) are respectively formed by splicing two half connecting rings, the two half connecting rings are connected by a second connecting plate, the outer end walls of the two half connecting rings are provided with a groove, the second connecting plate is installed in the groove of the half connecting ring, the second connecting plate is provided with a connecting hole, the two half connecting rings are provided with corresponding threaded blind holes, the bolts pass through the connecting holes on the second connecting plate and are respectively threadedly matched with the threaded blind holes on the half connecting rings, so that the two half connecting rings are spliced ​​into a complete connecting ring.

4. The luffing positioning device for a portal crane according to claim 1, characterized in that: The outer gear ring (23) is formed by correspondingly splicing two half gear rings (231), the two half gear rings (231) are connected by a third connecting plate (232), the upper and lower ends of the connection position of the two half gear rings (231) are respectively provided with grooves corresponding to the third connecting plate (232), the third connecting plate (232) is placed in the grooves of the two half gear rings (231), the third connecting plate (232) is provided with a connecting hole, the two half gear rings (231) are provided with corresponding threaded blind holes, bolts pass through the connecting holes on the third connecting plate (232) and are respectively threadedly matched with the threaded blind holes on the two half gear rings (231), so that the two half gear rings (231) are spliced ​​into a complete outer gear ring (23).

5. The luffing positioning device for a portal crane according to claim 1, characterized in that: The rotary reset mechanism (7) comprises a rotating shaft (72), a bending spring (73) and an arc-shaped slide block (74); one end of the upper connecting plate (4) and the lower connecting plate (6) are respectively provided with an arc-shaped slide groove; a mounting through hole is provided at the center of the arc-shaped slide groove; the lower end of the rotating shaft (72) is rotatably connected to the mounting through hole via a bearing; a shaft ring is provided on the rotating shaft (72); an arc-shaped slide block (74) is fixedly mounted on the lower end surface of the shaft ring; the arc-shaped slide block (74) is placed in the arc-shaped slide groove and slides with the arc-shaped slide groove Matching; two bending springs (73) are symmetrically installed in the arc-shaped slide groove, one end of the bending spring (73) is connected to the end wall of the arc-shaped slide groove, and the other end is pressed against one end of the arc-shaped slider (74); the upper connecting plate (4) is connected to the inner end of the support plate (71) through the rotating shaft (72), and the outer end of the support plate (71) is connected to the induction magnet; the lower connecting plate (6) is connected to the outer end of the support plate (71) through the rotating shaft (72), and the inner end of the support plate (71) is connected to the induction magnet.

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