Luffing jib tower crane with alarm mechanism and method for installing the same

Abstract

The present application discloses a boom tower crane with an alarm mechanism, in which an alarm device is added to a traditional boom tower crane. When the operator stops the crane, the tilt angle of the boom is automatically measured and the tilt angle is compared with the tilt angle range allowed by the boom. If the tilt angle does not fall within the above range, an audible and visual alarm is issued to the operator, prompting the operator to start the crane and adjust the boom to a safe tilt angle range, thereby fundamentally solving the safety hazard of shutdown. The alarm device is implemented without changing the mechanical structure of the boom tower crane itself, and only needs to be coaxially installed at the end of the boom shaft. The input shaft of the existing angle sensor can only output accurate data by bearing the rotational force, which requires the input shaft and the shaft to be coaxially installed. The connecting piece provided by the present application can realize the rapid alignment connection of the shaft and the input shaft, ensuring the accuracy of the monitoring data of the angle sensor while significantly extending the service life of the angle sensor.

Description

Technical Field

[0001] The present application belongs to the technical field of lifting machinery, and in particular relates to a jib tower crane with an alarm mechanism and a method for installing the alarm mechanism. Background Art

[0002] At present, domestic tower cranes are widely used in various fields. With the construction of cities, the available space around construction sites is getting smaller and smaller. Under such conditions, the application of luffing jib tower cranes has increased year by year. Luffing jib tower cranes can be used for construction in small spaces in cities, solving the problem of collision between the tower crane's balance arm and boom and surrounding buildings. However, when stopping the crane, the operator may not follow the manufacturer's instructions and move the boom to the allowed range before stopping. Failure to stop the crane at the allowed angle will bring risks to the luffing jib tower crane.

[0003] This application prompts the operator to perform corresponding operations by checking the angle of the crane arm when shutting down, thereby fundamentally eliminating the risks caused by shutting down at an unsafe angle. Summary of the Invention

[0004] One of the purposes of this application is to provide a jib tower crane with an alarm mechanism. An alarm device is installed on an existing jib tower crane to automatically detect whether the tilt angle of the jib is within the allowable angle range for shutdown when the operator stops the crane. If it is not within the allowable angle range, an alarm will be issued to the operator, thereby fundamentally eliminating safety hazards.

[0005] In order to solve the technical problem of irregular shutdown of a boom tower crane in the prior art, the present application provides a boom tower crane with an alarm mechanism, which includes a base, a tower column, a boom, a gimbal, a cab and an alarm device; the base is arranged at a construction site, the tower column is erected on the base, the gimbal is built on the top of the tower column, the boom is mounted on the gimbal via a hinge support, and the cab is mounted on the gimbal; the hinge support includes a rotating shaft and an axle seat, the axle seat is mounted on the gimbal, both ends of the rotating shaft are inserted into the axle seat, and the boom is fixed to the rotating shaft; the alarm device includes an angle sensor, a client, a control unit and an audible and visual alarm;

[0006] The angle sensor is installed on the hinge support and is used to collect the tilt angle data of the boom and transmit it back to the control unit.

[0007] The client is used to set the boom tilt angle data threshold and display the boom tilt angle data;

[0008] The control unit is used to receive the boom tilt angle data and compare it with the threshold value, and when the boom tilt angle data exceeds the threshold value, instruct the sound and light alarm to sound an alarm.

[0009] Furthermore, the present application provides a boom tower crane with an alarm mechanism, wherein the alarm device also includes a sensor quick-assembly, the sensor quick-assembly includes a sensor mounting bracket and a connecting piece, the sensor mounting bracket includes an annular plate and a bracket, the angle sensor is installed on the outer end face of the annular plate, the input shaft of the angle sensor passes through the annular plate, one end of the bracket is installed on the axle seat, and the other end is connected to the inner end face of the annular plate, and the input shaft is connected to the rotating shaft through the connecting piece.

[0010] Furthermore, the present application provides a boom tower crane with an alarm mechanism, wherein the connecting part includes a sleeve, a claw and a retraction structure; the sleeve is provided with an external threaded section, the claw is arranged in an open state on the sleeve and is located at the outer end of the external threaded section, the retraction structure includes a pull ring, a pull rod and a nut, the nut is screwed on the external threaded section, the pull ring is arranged on the sleeve and is located at the inner end of the external threaded section, one end of the pull rod is hinged to the claw, and the other end is hinged to the outer ring surface of the pull ring; the input shaft is inserted into the sleeve.

[0011] Furthermore, the present application provides a jib tower crane with an alarm mechanism, wherein the clamping claw includes a connecting block and a plurality of sub-claws distributed along the circumference of the sleeve, the connecting block is fixed to the sleeve, and one end of the plurality of sub-claws is connected to the connecting block and the other end is bent radially inward along the sleeve to form a clamping head.

[0012] Furthermore, the present application provides a jib tower crane with an alarm mechanism, which further includes a spirit level, wherein the spirit level is embedded in the outer wall of the sleeve and is arranged along the axial direction of the sleeve.

[0013] Furthermore, the present application provides a jib tower crane with an alarm mechanism, which further includes a tightening head installed at one end of the sleeve close to the rotating shaft.

[0014] Furthermore, the present application provides a jib tower crane with an alarm mechanism, wherein the sleeve is provided with an end external thread, the tightening head is provided with an internal thread, and the tightening head is connected to the end external thread through the internal thread.

[0015] A second object of the present application is to provide a method for installing an alarm mechanism, which relates to the above-mentioned jib tower crane with a working status alarm mechanism, and comprises the following steps:

[0016] Step 1: Hold the sleeve and press its inner end against the end of the shaft. Tighten the nut until the claws touch the side of the shaft. Release the nut and wait for the sleeve to move freely under the force of the claws.

[0017] Step 2: Hold the sleeve again and press its inner end against the end of the shaft. Tighten the nut to ensure that the claws tightly clamp the side of the shaft.

[0018] The present application discloses a boom tower crane with an alarm mechanism, which has the following advantages over the prior art: on the one hand, an alarm device is added to the traditional boom tower crane, and the operator automatically measures the tilt angle of the boom when the crane stops, and compares the tilt angle with the tilt angle range allowed by the boom. If the tilt angle does not fall within the above range, an audible and visual alarm is issued to the operator, prompting the operator to start the crane and adjust the boom to a safe tilt angle range, thereby fundamentally solving the safety hazard of shutdown; on the other hand, the alarm device provided by the present application is implemented without changing the mechanical structure of the boom tower crane itself, and only needs to be coaxially installed at the end of the boom shaft. The input shaft of the existing angle sensor can only output accurate data by bearing the rotational force, which requires the input shaft and the shaft to be coaxially installed. The connecting piece provided by the present application can realize the rapid alignment connection of the shaft and the input shaft, ensure the coaxial operation of the input shaft and the shaft, ensure the accuracy of the monitoring data of the angle sensor, and significantly extend the service life of the angle sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a jib tower crane with an alarm mechanism for this application;

[0020] Figure 2 This is a schematic structural diagram of an alarm device in a boom tower crane with an alarm mechanism according to the present application;

[0021] Figure 3 This is a schematic diagram of the assembly structure of an alarm device in a jib tower crane with an alarm mechanism according to the present application;

[0022] Figure 4 This is a schematic structural diagram of an alarm device in a jib tower crane with an alarm mechanism according to the present application;

[0023] Figure 5 for Figure 4 Schematic diagram of the transformation position structure;

[0024] Figure 6 This is a structural diagram of the first step of installing an alarm device in a boom tower crane with an alarm mechanism according to the present application;

[0025] Figure 7 This is a structural schematic diagram of the second step of installing an alarm device in a jib tower crane with an alarm mechanism according to the present application.

[0026] Among them: 1. Base; 2. Tower; 3. Boom; 4. Gimbal; 5. Cab; 6. Rotating shaft; 7. Axle seat; 8. Angle sensor; 9. Client; 10. Control unit; 11. Sound and light alarm; 12. Ring plate; 13. Sensor mounting bracket; 14. Input shaft; 15. Sleeve; 16. Claw; 17. External thread section; 18. Pull ring; 19. Pull rod; 20. Nut; 21. Connecting block; 22. Sub-claw; 23. Clamping head; 24. Level; 25. Clamping head; 26. External end thread; 27. Internal thread. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. 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 work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] like Figure 1 and Figure 2As shown, this embodiment provides a boom 3 tower crane with a non-working state alarm mechanism, which includes a base 1, a tower column 2, a boom 3, a gimbal 4, a cab 5 and an alarm device; the base 1 is arranged at a construction site, the tower column 2 is erected on the base 1, the gimbal 4 is built on the top of the tower column 2, the boom 3 is mounted on the gimbal 4 through a hinge support, and the cab 5 is mounted on the gimbal 4; the hinge support includes a rotating shaft 6 and an axle seat 7, the axle seat 7 is mounted on the gimbal 4, both ends of the rotating shaft 6 are inserted into the axle seat 7, and the boom 3 is fixed to the rotating shaft 6; the alarm device includes an angle sensor 8, a client 9, a control unit 10 and an audible and visual alarm 11;

[0029] The angle sensor 8 is installed on the hinge support and is used to collect the tilt angle data of the boom 3 and transmit it back to the control unit 10.

[0030] The client 9 is used to set the boom 3 tilt angle data threshold and display the boom 3 tilt angle data;

[0031] The control unit 10 is used to receive the tilt angle data of the boom 3 and compare it with the threshold value, and when the tilt angle data of the boom 3 exceeds the threshold value, instruct the sound and light alarm 11 to sound an alarm.

[0032] Among them, Figures 3 to 6 As shown, the alarm device includes a sensor quick-install part, and the sensor quick-install part includes a sensor mounting bracket 13 and a connecting part. The sensor mounting bracket 13 includes an annular plate 12 and a bracket 13. The angle sensor 8 is installed on the outer end surface of the annular plate 12. The input shaft 14 of the angle sensor 8 passes through the annular plate 12. One end of the bracket 13 is installed on the shaft seat 7 and the other end is connected to the inner end surface of the annular plate 12. The input shaft 14 is connected to the rotating shaft 6 through the connecting part; the connecting part includes a sleeve 15, a claw 16 and a contraction structure; the sleeve 15 is provided with an external thread section 17, and the claw 16 is sleeved on the sleeve 15 in an open shape and is located at the At the outer end of the external threaded section 17, the contraction structure includes a pull ring 18, a pull rod 19 and a nut 20, the nut 20 is screwed on the external threaded section 17, the pull ring 18 is sleeved on the sleeve 15 and is located at the inner end of the external threaded section 17, one end of the pull rod 19 is hinged to the claw 16, and the other end is hinged to the outer ring surface of the pull ring 18; the input shaft 14 is inserted into the sleeve 15; the claw 16 includes a connecting block 21 and a number of sub-claws 22 distributed along the circumference of the sleeve 15, the connecting block 21 is fixed to the sleeve 15, and one end of the sub-claws 22 is connected to the connecting block 21, and the other end is bent radially inward along the sleeve 15 to form a clamping head 23.

[0033] As a further preferred embodiment, this embodiment further provides a spirit level 24 and a tightening head 25. The spirit level 24 is embedded in the outer wall of the sleeve 15. The spirit level 24 is arranged along the axial direction of the sleeve 15. The spirit level 24 can be used for a quick check later on whether the rotating shaft 6 and the sleeve 15 are coaxial. If the spirit level 24 shows that it is not in a horizontal state, the entire alarm device installation structure needs to be adjusted; the tightening head 25 is installed at one end of the sleeve 15 close to the rotating shaft 6; the sleeve 15 opens an end external thread 26, and the tightening head 25 opens an internal thread 27. The tightening head 25 is connected to the end external thread 26 through the internal thread 27.

[0034] A method for installing an alarm mechanism, relating to the above-mentioned boom tower crane with a working status alarm mechanism, comprises the following steps:

[0035] Step 1: Hold the sleeve 15 and press the clamping head 25 against the end of the shaft 6, screw the nut 20 until all the sub-claws 22 touch the side of the shaft 6, and then release the sleeve 15 to allow it to move freely under the force of the claws 16. This step is a key step for the clamping head 25 to find the center point of the shaft 6, and it is also a key step to ensure that the shaft 6 and the input shaft 14 of the angle sensor 8 run coaxially, because when the sleeve 15 is pressed against the end of the shaft 6, it is impossible to accurately press against the center point of the shaft 6 at one time. Figure 4 As shown, only when the clamping heads 23 of the sub-claws 22 all abut against the rotating shaft 6, then the sub-claws 22 can drive the sleeve 15 installed at the center thereof to the center point;

[0036] Step 2: Hold the sleeve 15 again and press its inner end against the end of the rotating shaft 6, screw the nut 20 to ensure that the claws 16 tightly clamp the side of the rotating shaft 6, so that the coaxial installation of the rotating shaft 6 and the input shaft 14 of the angle sensor 8 can be ensured.

[0037] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified and replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A jib tower crane with an alarm mechanism, characterized in that: It includes a base, a tower, a boom, a gimbal, a cab and an alarm device; the base is arranged at a construction site, the tower is erected on the base, the gimbal is built on the top of the tower, the boom is installed on the gimbal through a hinge support, and the cab is installed on the gimbal; the hinge support includes a rotating shaft and an axle seat, the axle seat is installed on the gimbal, both ends of the rotating shaft are inserted into the axle seat, and the boom is fixed to the rotating shaft; the alarm device includes an angle sensor, a client, a control unit and an audible and visual alarm; The angle sensor is installed on the hinge support and is used to collect the tilt angle data of the boom and transmit it back to the control unit. The client is used to set the boom tilt angle data threshold and display the boom tilt angle data; The control unit is used to receive the boom tilt angle data and compare it with the threshold value, and when the boom tilt angle data exceeds the threshold value, instruct the sound and light alarm to sound an alarm; The alarm device also includes a sensor quick-assembly, which includes a sensor mounting bracket and a connecting piece. The sensor mounting bracket includes an annular plate and a bracket. The angle sensor is installed on the outer end face of the annular plate. The input shaft of the angle sensor passes through the annular plate. One end of the bracket is installed on the shaft seat and the other end is connected to the inner end face of the annular plate. The input shaft is connected to the rotating shaft through the connecting piece; the connecting piece includes a sleeve, a claw and a shrinkage structure; the sleeve is provided with an external threaded section, the claw is arranged in an open shape on the sleeve and is located at the outer end of the external threaded section, the shrinkage structure includes a pull ring, a pull rod and a nut, the nut is screwed on the external threaded section, the pull ring is arranged on the sleeve and is located at the inner end of the external threaded section, one end of the pull rod is hinged to the claw and the other end is hinged to the outer ring surface of the pull ring; the input shaft is inserted into the sleeve.

2. The luffing jib tower crane with an alarm mechanism according to claim 1, wherein: The clamping claw includes a connecting block and several sub-claws distributed along the circumference of the sleeve. The connecting block is fixed to the sleeve. One end of several sub-claws is connected to the connecting block and the other end is bent radially inward along the sleeve to form a clamping head.

3. The luffing jib tower crane with an alarm mechanism according to claim 2, characterized in that: It also includes a spirit level, which is embedded in the outer wall of the sleeve and is arranged along the axial direction of the sleeve.

4. The luffing jib tower crane with an alarm mechanism according to any one of claims 1 to 3, characterized in that: It also includes a tightening head, which is installed on one end of the sleeve close to the rotating shaft.

5. The luffing jib tower crane with an alarm mechanism according to claim 4, characterized in that: The sleeve is provided with an external thread at the end, and the tightening head is provided with an internal thread. The tightening head is connected to the external thread at the end through the internal thread.

6. A method for installing an alarm mechanism, characterized in that: The luffing jib tower crane with an alarm mechanism according to any one of claims 1 to 5 comprises the following steps: Step 1: Hold the sleeve and press its inner end against the end of the shaft. Tighten the nut until the claws touch the side of the shaft. Release the nut and wait for the sleeve to move freely under the force of the claws. Step 2: Hold the sleeve again and press its inner end against the end of the shaft. Tighten the nut to ensure that the claws tightly clamp the side of the shaft.

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