Self-centering crane electric windproof securing system

Abstract

The invention provides a self-centering windproof mooring system for a crane. The self-centering windproof mooring system comprises an electric pull rod; an anchor socket; the electric control box comprises a controller electrically connected with the electric pull rod, the electric pull rod comprises a tubular rod body, a lug ring, a nut, a driving motor, a speed reducer and a hollow tubular composite lead screw, and the composite lead screw is arranged on an output shaft of the speed reducer in a sleeving manner in a circumferential fixing and axial sliding manner; the anchor seat comprises a base, a hollow circular-ring-shaped guide cover, a hollow tourbillon-shaped floating nut, a spring pressing seat and two belleville springs, the middle of the hollow tourbillon-shaped floating nut is large in diameter, the two ends of the hollow tourbillon-shaped floating nut are small in diameter, an inverted-cone-shaped guide hole is formed in the upper end face of the guide cover, and the two belleville springs are arranged at the upper end and the lower end of the floating nut in a sleeving mode respectively. According to the invention, when the stop position error of the cart occurs, the lead screw of the electric pull rod extends out and is automatically centered and screwed in with the nut of the base; moreover, the device has the advantages of simple structure, convenience in operation, high fastening efficiency, automation, safety, reliability and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting machinery used in ports, docks, storage yards and the like, and in particular relates to a self-centering electric windproof securing system for a crane. Background Art

[0002] Cranes are important equipment for port loading and unloading operations, and their safety is of vital importance. The windproof fastening system is mainly used to prevent the crane from being blown by strong winds such as typhoons or gusts when not in operation, causing safety accidents such as crane capsizing. Timely and reliable windproof fastening before the arrival of typhoons and gusts is an important guarantee for the safe operation of cranes. Traditional windproof fastening of cranes mostly uses manpower to connect windproof cables or windproof pull rods to the foundation anchor seat, and then tighten them manually.

[0003] In order to solve the shortcomings of the traditional windproof fastening system, there is an electric windproof fastening device driven by a motor. However, the electric windproof fastening device also has shortcomings: when the electric pull rod is fastened, the lead screw of the electric pull rod extends out and engages with the nut plate thread of the anchor seat. In order to ensure that the lead screw and the nut are smoothly screwed in and engaged, a high axis alignment accuracy of the lead screw and the nut is required. However, since the stopping position of the crane trolley is affected by the inertia of the crane's own weight, the friction resistance of the track and the wheel, and the accuracy of the trolley positioning system, even the crane trolley with the best parking accuracy currently has an error of more than 50mm in stopping position accuracy, which makes it difficult for the lead screw of the electric pull rod to extend and engage with the nut thread of the anchor seat smoothly. This requires manual control of the micro-motion trolley to ensure that the lead screw of the electric pull rod extends out and the nut thread of the anchor seat is aligned. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a self-centering electric windproof securing system for cranes.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a self-centering crane windproof securing system, which has the following characteristics: an electric pull rod, which is used to be suspended on a crane main engine; an anchor seat, which is used to be installed on a dock foundation; and an electric control box, which includes a controller electrically connected to the electric pull rod, wherein the electric pull rod includes a tubular rod body, earrings, nuts, a drive motor, a reducer, and a hollow tubular composite screw rod, the earrings and the nuts are respectively fixed to the upper end and the lower end of the rod body, the drive motor, the reducer, and the composite screw rod are sequentially installed in the rod body from top to bottom, and the composite screw rod is sleeved in a circumferentially fixed and axially slidable manner. The guide cover is fixedly arranged on the base, and a guide hole in the shape of an inverted cone that matches the composite lead screw is provided on the upper end face. The floating nut is movably installed in the guide cover and has an internal thread that matches the external thread of the composite lead screw. The spring seat is fixedly arranged on the lower end face of the guide cover, and the two butterfly springs are respectively sleeved on the upper and lower ends of the floating nut.

[0007] The self-centering crane windproof securing system provided by the present invention may also have the following features: wherein, the composite screw and the output shaft of the reducer are circumferentially fixed and axially slidable through the following structure: a guide key is provided on the outer surface of the output shaft, and the inner hole of the composite screw is provided with a keyway extending along the axial direction of the composite screw and matching the guide key.

[0008] The self-centering crane windproof securing system provided by the present invention may also have the following feature: wherein the guide key is a spline.

[0009] The self-centering crane windproof securing system provided by the present invention may also have the following features: an upper position sensor and a lower position sensor for detecting the position of the composite screw rod and electrically connected to the controller respectively are provided on the rod body.

[0010] The self-centering crane windproof securing system provided by the present invention may also have the following feature: wherein the rod body and the nut are coaxially arranged.

[0011] The self-centering crane windproof securing system provided by the present invention may also have the following features: wherein the guide cover, floating nut, butterfly spring and spring pressure seat are coaxially arranged.

[0012] The self-centering crane windproof securing system provided by the present invention may also have the following features: wherein the base is composed of an upper plate, a pipe seat body and a bottom plate.

[0013] The self-centering crane windproof securing system provided by the present invention may also have the following feature: wherein, the bottom plate is provided with mounting screw holes for connecting with the anchor bolts pre-buried in the dock foundation.

[0014] The self-centering crane windproof securing system provided by the present invention may also have the following feature: a spherical bearing is installed in the inner hole of the earring.

[0015] The self-centering crane windproof securing system provided by the present invention may also have the following features: a manual device is provided at a position on the rod body corresponding to the upper end of the driving motor.

[0016] The manual device is connected to the rotating shaft of the driving motor.

[0017] Compared with the prior art, the advantages of the self-centering crane electric windproof securing system of the present invention are:

[0018] (1) When the crane trolley stops at an error position, the lead screw of the electric pull rod can be extended and automatically centered with the nut of the base, without the need for manual intervention in trolley parking, thus truly realizing unmanned parking of the crane trolley.

[0019] (2) Simple structure, easy operation, fully automated, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 2 is a schematic diagram of the three-dimensional structure of the self-centering crane electric windproof securing system in the secured state according to the embodiment of the present invention;

[0021] Figure 2 is a schematic cross-sectional structural diagram of a self-centering crane electric windproof securing system in a non-secured state in an embodiment of the present invention;

[0022] Figure 3 2 is a schematic cross-sectional structural diagram of a self-centering crane electric windproof securing system in a securing state according to an embodiment of the present invention;

[0023] Figure 4 is a schematic cross-sectional structure diagram of an electric pull rod in an embodiment of the present invention; and

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the anchor seat in an embodiment of the present invention.

[0025] In the figure: 100 is an electric pull rod, 101 is an earring, 102 is a manual device, 103 is a driving motor, 104 is a rod body, 105 is a reducer, 106 is a composite screw rod, 107 is a nut, 108 is a lower position sensor, 109 is an upper position sensor, 110 is a junction box, 200 is an anchor seat, 201 is a guide cover, 202 is a spring, 203 is a base, 204 is a spring pressure seat, 205 is a floating nut, and 300 is an electric control box. DETAILED DESCRIPTION

[0026] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0027] <Example>

[0028] Figure 1 2 is a schematic diagram of the three-dimensional structure of the self-centering crane electric windproof securing system in the secured state according to the embodiment of the present invention; Figure 2 is a schematic cross-sectional structural diagram of a self-centering crane electric windproof securing system in a non-secured state in an embodiment of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the self-centering crane electric windproof securing system in the secured state in an embodiment of the present invention.

[0029] like Figures 1 to 3 As shown, in this embodiment, the self-centering crane windproof securing system includes an electric pull rod 100 , an anchor seat 200 and an electric control box 300 .

[0030] Figure 4 Schematic diagram of the cross-sectional structure of the electric pull rod in the embodiment of the present invention.

[0031] like Figures 1 to 4 As shown, the electric pull rod 100 is suspended on the crane host, and includes a rod body 104, an earring 101, a nut 107, a drive motor 103, a reducer 105, a composite screw rod 106, a manual device 102, an upper position sensor 109, a lower position sensor 108 and a junction box 110.

[0032] The rod body 104 is tubular and is formed by assembling steel pipes of a certain thickness.

[0033] The earring 101 is fixedly arranged at the upper end of the rod body 104 for connecting with the crane mainframe. In this embodiment, a spherical bearing is installed in the inner hole of the earring 10, so that the electric pull rod 100 can be tilted and rotated relative to the crane mainframe.

[0034] The nut 107 is coaxially fixedly disposed on the lower end of the rod body 104 .

[0035] The driving motor 103, the reducer 105 and the composite screw rod 106 are coaxially connected and installed in the rod body 104 in sequence from top to bottom.

[0036] The composite screw 106 is a hollow tubular shaft, which is sleeved on the output shaft of the reducer 105 in a circumferentially fixed and axially slidable manner, and is movably installed in the nut 107 , and its outer surface has an external thread matching the internal thread of the nut 107 .

[0037] In this embodiment, the composite screw 107 and the output shaft of the reducer 105 are circumferentially fixed and axially slidable through the following structure: a guide key is provided on the outer surface of the output shaft of the reducer 105, and the guide key is preferably a spline; the inner hole of the composite screw 106 is provided with a keyway extending along its axial direction and matching the guide key.

[0038] In this embodiment, when the composite screw rod 106 retracts to the innermost part of the rod body 104, the external thread of the composite screw rod 106 and the internal thread of the nut 107 do not disengage; when the composite screw rod 106 extends out of the rod body 104 to the longest, the keyway in the inner hole of the composite screw rod 106 and the guide key on the output shaft of the reducer 105 do not disengage.

[0039] The upper position sensor 109 and the lower position sensor 108 are used to detect the position of the composite screw rod 106, and are respectively fixed on the rod body 104, and correspond to the position where the composite screw rod 106 retracts to the innermost part of the rod body 104 and the position where the composite screw rod 106 extends the longest from the rod body 104.

[0040] The manual device 102 is arranged at a position on the rod body 104 corresponding to the upper end of the drive motor 103, and is connected to the rotating shaft of the drive motor 103. It is used to manually rotate the rotating shaft of the drive motor 103 when the power is off or other drive motors cannot be started, thereby achieving the fastening of the electric pull rod 100 and the anchor seat 200 and the release of the anchor.

[0041] The junction box 110 is fixedly disposed on the rod body 104 .

[0042] Figure 5 It is a schematic diagram of the cross-sectional structure of the anchor seat in an embodiment of the present invention.

[0043] like Figures 1 to 3 as well as Figure 5 As shown, the anchor seat 200 is used to be installed on the dock foundation, and includes a base 203 , a guide cover 201 , a floating nut 205 , a spring pressure seat 204 and two butterfly springs 202 .

[0044] The base 203 is used to be installed on the dock foundation, and is composed of an upper plate, a pipe seat body and a bottom plate. In this embodiment, the bottom plate is provided with mounting screw holes for connecting with anchor bolts pre-buried in the dock foundation.

[0045] The guide cover 201 is in the shape of a hollow ring and is fixedly mounted on the upper plate of the base 203 . A guide hole matching the composite screw rod 106 is disposed on its upper end surface. The guide hole is in the shape of an inverted cone with a relatively large chamfer.

[0046] The floating nut 205 is movably installed in the guide cover 201 and is in the shape of a hollow tourbillon with a large diameter in the middle and small diameters at both ends. The inner hole of the floating nut 205 has an internal thread that matches the external thread of the composite screw rod 106 .

[0047] The spring pressure seat 204 is fixedly disposed on the lower end surface of the guide cover 201 .

[0048] Two butterfly springs 202 are located in the guide cover 201 and are respectively sleeved on the upper end and the lower end of the floating nut 205. The inner hole of the butterfly spring 202 matches the small diameter shaft stoppers at both ends of the floating nut 205.

[0049] In this embodiment, the guide cover 201 , the floating nut 205 , the butterfly spring 202 and the spring pressure seat 204 are coaxially arranged.

[0050] like Figures 1 to 3 As shown, the electric control box 300 is suspended on the main crane, and includes a PLC controller and an operation panel, etc. The PLC controller is electrically connected to the upper position sensor 109, the lower position sensor 108, and the drive motor 103, respectively, and is used to receive the operation instructions input from the operation panel and the position signals sent by the upper position sensor 109 and the lower position sensor 108, and control the drive motor 103 to operate, thereby realizing the automatic fastening of the electric pull rod 100 and the anchor seat 200 and the release of the anchor.

[0051] like Figures 1 to 5 As shown, the process of anchoring and unanchoring of the self-centering crane windproof anchoring system in this embodiment is as follows:

[0052] When fastening, the electric control box 300 is powered on, and the drive motor 103 is decelerated and torque is increased by the reducer 105. The output shaft of the reducer 105 drives the composite screw 106 to rotate. Since the nut 107 of the electric pull rod 100 is fixed to the rod body 104, the composite screw 106 extends out from the rod body 104 after rotation. When there is an error in the stop position of the crane trolley, the lower end of the composite screw 106 will be screwed in along the inverted cone-shaped guide hole of the guide cover 201. Since the earring 101 is provided with a spherical bearing, the electric pull rod 100 is tilted to a certain extent, and the lower end of the composite screw 106 is spun against the end face of the floating nut 205, so that the butterfly spring 202 is unilaterally compressed, and the external thread of the composite screw 106 is coupled with the internal thread of the floating nut 205 to achieve screwing. When the design required position is reached, the lower position sensor 108 sends a stop command to the PLC controller of the electric control box 300, and the drive motor 103 stops moving, thereby achieving the fastening of the electric pull rod 100 and the anchor seat 200.

[0053] When the anchor is released, the drive motor 103 is energized in reverse, the composite screw rod 106 rotates in the opposite direction to screw out the floating nut 205, and the composite screw rod 106 retracts into the rod body 104 of the electric pull rod 100 to reach the designed position. The upper position sensor 109 sends a stop command to the PLC controller of the electrical control box 300, and the drive motor 103 stops moving, thereby realizing the release of the fastening between the electric pull rod 100 and the anchor seat 200.

[0054] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A self-centering crane windproof securing system, characterized in that: include: Electric drawbar, used to hang on the crane host; Anchor base, for installation on the dock foundation; as well as an electric control box, comprising a controller electrically connected to the electric pull rod, The electric pull rod comprises a tubular rod body, earrings, nuts, a driving motor, a reducer and a hollow tubular composite screw. The earring and the nut are respectively fixed to the upper end and the lower end of the rod body. The driving motor, the speed reducer and the composite screw are sequentially installed in the rod body from top to bottom. The composite screw rod is sleeved on the output shaft of the reducer in a circumferentially fixed and axially slidable manner, and the outer surface thereof has an external thread matching the internal thread of the nut. The anchor seat comprises a base, a guide cover in the shape of a hollow ring, a floating nut in the shape of a hollow tourbillon with a large diameter in the middle and small diameters at both ends, a spring pressure seat and two butterfly springs. The guide cover is fixedly arranged on the base, and an upper end surface is provided with a guide hole matching the composite screw rod and in an inverted cone shape. The floating nut is movably mounted in the guide cover and has an internal thread matching the external thread of the composite screw rod. The spring pressure seat is fixedly arranged on the lower end surface of the guide cover. The two butterfly springs are respectively sleeved on the upper end and the lower end of the floating nut.

2. The self-centering crane windproof securing system according to claim 1, characterized in that: in, The composite screw and the output shaft of the reducer are circumferentially fixed and axially slidable through the following structure: A guide key is provided on the outer surface of the output shaft. The inner hole of the composite screw rod is provided with a keyway which extends along the axial direction of the composite screw rod and matches the guide key.

3. The self-centering crane windproof securing system according to claim 2, characterized in that: in, The guide key is a spline.

4. The self-centering crane windproof securing system according to claim 1, characterized in that: in, The rod body is provided with an upper position sensor and a lower position sensor for detecting the position of the composite screw rod and electrically connected to the controller respectively.

5. The self-centering crane windproof securing system according to claim 1, characterized in that: in, The rod body and the nut are coaxially arranged.

6. The self-centering crane windproof securing system according to claim 1, characterized in that: in, The guide cover, the floating nut, the butterfly spring and the spring pressure seat are coaxially arranged.

7. The self-centering crane windproof securing system according to claim 1, characterized in that: in, The base is composed of an upper plate, a tube seat body and a bottom plate.

8. The self-centering crane windproof securing system according to claim 7, characterized in that: in, The bottom plate is provided with mounting screw holes for connecting with pre-buried anchor bolts of the dock foundation.

9. The self-centering crane windproof securing system according to claim 1, characterized in that: in, A spherical bearing is installed in the inner hole of the earring.

10. The self-centering crane windproof securing system according to claim 1, characterized in that: Also includes: A manual device is arranged at a position on the rod body corresponding to the upper end of the driving motor, Wherein, the manual device is connected to the rotating shaft of the driving motor.

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