Anti-collision mechanism for tower crane

Abstract

The invention discloses an anti-collision mechanism for a tower crane, which belongs to the technical field of tower cranes and comprises two mounting frames symmetrically arranged on two sides of a jacking sleeve frame of the tower crane, the two mounting frames are positioned below a suspension arm, and the two mounting frames form a rectangular inner side wall which is attached to the outer side wall of the jacking sleeve frame; the mounting frames are in threaded connection with a plurality of mounting screws at equal intervals, and the two mounting frames are fixed to the jacking sleeve frame through the mounting screws; the rotary driving mechanism drives the two rotary frames to rotate on the rotary supporting mechanism so as to drive the collision object detection mechanism to rotate, and the rotating collision object detection mechanism can carry out obstacle detection on the working range of the tower crane in all directions; the mechanism is used for detecting the obstacles in the working range of the tower crane before the tower crane works, and has prejudgment, so that the problem that the tower crane cannot respond in time during operation is avoided, and the working safety of the tower crane is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tower cranes, and particularly relates to an anti-collision mechanism for a tower crane. Background Art

[0002] Tower cranes refer to large lifting machinery used for vertical and horizontal transportation of materials. They are widely used in construction, bridge engineering, port terminals and other fields.

[0003] With the rapid development of high-rise buildings in cities and the normalization of multi-machine collaborative operations on construction sites, collision accidents between tower cranes and between cranes and surrounding obstacles occur frequently, which not only causes significant economic losses but also seriously threatens the safety of construction workers. Therefore, it is of great significance to study and optimize the anti-collision mechanism of tower cranes.

[0004] Chinese patent application No. 202222684701.4 discloses a new anti-collision tower crane, including a tower crane. A laser protection radar is set on the working wall of the tower crane, and an alarm is also set. When the tower crane is operating, if the laser protection radar detects that the distance is too close, the alarm will sound.

[0005] The above technology has the following problems: the above-mentioned existing tower cranes are based on real-time detection of laser protection radar for collision prevention, which is not predictive. In some cases, the tower cranes in operation cannot respond in time when the alarm sounds, which reduces the working safety of the tower cranes.

[0006] In view of this, an anti-collision mechanism for a tower crane is designed to solve the above problems. Summary of the Invention

[0007] In order to solve the problems raised in the above background technology, the present invention provides an anti-collision mechanism for a tower crane, which has the characteristics of predictive ability, avoiding the problem of the tower crane being unable to respond in time during operation, and improving the working safety of the tower crane.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an anti-collision mechanism for a tower crane, comprising: two mounting brackets symmetrically arranged on both sides of a jacking sleeve of the tower crane, the two mounting brackets are located below the boom, the two mounting brackets are combined into a rectangular inner wall that fits the outer wall of the jacking sleeve, a plurality of mounting screws are threadedly connected at equal intervals on the mounting brackets, the two mounting brackets are fixed to the jacking sleeve by the plurality of mounting screws, two rotating brackets are symmetrically arranged on the outer sides of the two mounting brackets, the two rotating brackets are combined into a ring, the two rotating brackets and the two mounting brackets are equipped with a rotation drive mechanism and a rotation support mechanism, one of the rotating brackets is equipped with a collision object detection mechanism away from the side wall of the other rotating bracket, and the rotation drive mechanism and the collision object detection mechanism are electrically connected to the tower crane control system.

[0009] Furthermore, the rotation drive mechanism includes a mounting plate fixedly connected to the side wall of one mounting frame away from the other mounting frame and two internal gear plates fixedly connected to the bottom ends of the two rotating frames. A first motor is fixedly connected to the top of the mounting plate. The output end of the first motor extends through the mounting plate to the bottom and is fixedly sleeved with a first gear. The two internal gear plates form an internal gear ring. The first gear is meshed and connected with the two internal gear plates forming the internal gear ring. The first motor is electrically connected to the tower crane control system.

[0010] Furthermore, the rotating support mechanism includes a plurality of support rods fixedly connected to the outer wall of the mounting frame at equal intervals and sliding grooves opened on the inner walls of the two rotating frames. The support rods are fixedly connected with sliding balls away from the end walls of the mounting frame. The two sliding grooves are combined into a rotating groove, and the sliding balls are slidably connected in the two sliding grooves combined into the rotating groove.

[0011] Furthermore, the collision object detection mechanism includes a support frame fixedly connected to a side wall of a rotating frame away from another rotating frame, a mounting opening is opened at the bottom of the support frame, and a fixed frame is fixedly connected to the mounting opening, a plurality of movable frames are arranged at equal intervals from top to bottom inside the support frame and above the fixed frame, a movable supporting mechanism is respectively installed between the lowest movable frame and the fixed frame and between two adjacent movable frames, a movable driving mechanism is installed between the fixed frame, the movable frame and the support frame, a plurality of laser ranging sensors are fixedly embedded at equal intervals on the movable frame, and when the fixed frame and the plurality of movable frames are unfolded, they are the same length as the boom, and the detection range of the plurality of laser ranging sensors is fully covered, and the movable driving mechanism and the laser ranging sensor are electrically connected to the tower crane control system.

[0012] Furthermore, the movable support mechanism includes two movable rods symmetrically fixed to the bottom end of the movable frame and two movable grooves symmetrically opened on the fixed frame, the bottom and the top of the middle movable frame. The two movable rods are located away from the movable side, and the fixed rod is fixed inside the movable groove. The movable rod is movably connected to the fixed rod through an open hole socket.

[0013] Furthermore, the mobile driving mechanism includes a second motor fixedly connected to the bottom end of the support frame, a first driving shaft arranged inside the support frame, and several racks fixed to one side wall of the fixed frame and the movable frame. The first driving shaft is located on one side of the fixed frame and the movable frame, the bottom end of the first driving shaft is connected to the output end of the second motor through a coupling, and the top end is connected to the top wall of the support frame through a bearing, and the first driving shaft is fixedly sleeved with a second gear at the position corresponding to the fixed frame and the movable frame inside the support frame. In the initial state, the top second gear is meshed with the rack of the top movable frame, and the other second gears are not meshed with the rack. As the top movable frame moves to the extreme position, the second gear at the next lower level is meshed with the rack of the next lower movable frame, and so on. The second motor is electrically connected to the tower crane control system.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention drives two rotating frames to rotate on a rotating support mechanism through a rotating drive mechanism, thereby driving a collision object detection mechanism to rotate. The rotating collision object detection mechanism can perform obstacle detection in all directions within the working range of the tower crane. The mechanism detects obstacles within the working range of the tower crane before the tower crane starts working, has predictive ability, avoids the problem of the tower crane being unable to respond in time during operation, and improves the working safety of the tower crane.

[0016] 2. The obstacle detection mechanism of the present invention is composed of several movable frames that move from top to bottom and a fixed frame. The lowest movable frame and the fixed frame, as well as the two adjacent movable frames, are driven to move by a movable drive mechanism, which can realize the functions of extending in working state and folding in non-working state, thereby preventing the mechanism from interfering with the operation of the tower crane when it is not working. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the present invention;

[0018] Figure 2 This is a diagram of the collision object detection mechanism of the present invention;

[0019] Figure 3 For the present invention Figure 2 Partial vertical section;

[0020] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a state diagram of the local structure after the present invention is moved;

[0022] In the picture: 1. Mounting bracket; 2. Mounting screws; 3. Rotating bracket;

[0023] 101. Mounting plate; 102. First motor; 103. First gear; 104. Internal gear plate;

[0024] 201, support rod; 202, sliding ball; 203, sliding groove;

[0025] 301, support frame; 302, movable frame; 303, laser ranging sensor; 304, fixed frame;

[0026] 401, movable rod; 402, movable slot; 403, fixed rod;

[0027] 501, second motor; 502, second gear; 503, drive shaft; 504, rack. DETAILED DESCRIPTION

[0028] 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.

[0029] The present invention provides the following technical solution: an anti-collision mechanism for a tower crane, comprising: two mounting frames 1 symmetrically arranged on both sides of a jacking sleeve of the tower crane, the two mounting frames 1 are located below the boom, the two mounting frames 1 are combined into a rectangular inner wall that fits the outer wall of the jacking sleeve, a plurality of mounting screws 2 are threadedly connected at equal intervals on the mounting frames 1, the two mounting frames 1 are fixed to the jacking sleeve by the plurality of mounting screws 2, two rotating frames 3 are symmetrically arranged on the outside of the two mounting frames 1, the two rotating frames 3 are combined into a ring, the two rotating frames 3 and the two mounting frames 1 are equipped with a rotation drive mechanism and a rotation support mechanism, a collision object detection mechanism is equipped on the side wall of one rotating frame 3 away from the other rotating frame 3, and the rotation drive mechanism and the collision object detection mechanism are electrically connected to the tower crane control system.

[0030] In this embodiment, see the attached Figure 1 Before the mechanism works, place the two mounting brackets 1 on both sides of the jacking frame under the boom of the tower crane and move them together so that the inner walls of the two mounting brackets 1 fit the outer walls of the jacking frame of the tower crane. Then, use several mounting screws 2 to fix the two mounting brackets 1 on the jacking frame of the tower crane.

[0031] When the mechanism is working, the collision object detection mechanism is controlled to extend by the tower crane control system until it stops at the limit. At this time, the length of the collision object detection mechanism is the same as the length of the boom. The rotation drive mechanism is controlled to start by the tower crane control system. The rotation drive mechanism drives the two rotating frames 3 to rotate under the support of the rotation support mechanism. The two rotating frames 3 drive the collision object detection mechanism to rotate. During the rotation process, the collision object detection mechanism detects the surrounding collision objects. If no collision objects are detected in the surrounding area, it will not take action. If a collision object is detected in the surrounding area, it will be transmitted to the tower crane control system for early warning to achieve collision prevention.

[0032] Specifically, the rotary drive mechanism includes a mounting plate 101 fixedly connected to the side wall of one mounting frame 1 away from the other mounting frame 1 and two internal tooth plates 104 fixedly connected to the bottom ends of the two rotating frames 3. A first motor 102 is fixedly connected to the top of the mounting plate 101. The output end of the first motor 102 extends through the mounting plate 101 to the bottom and is fixedly sleeved with a first gear 103. The two internal tooth plates 104 form an inner gear ring. The first gear 103 is meshed and connected with the two internal tooth plates 104 forming the inner gear ring. The first motor 102 is electrically connected to the tower crane control system.

[0033] In this embodiment, see the attached Figure 1 The rotation drive mechanism is controlled by the tower crane control system to start the first motor 102, and the first motor 102 drives the output end to rotate, driving the first gear 103 to rotate. During the rotation of the first gear 103, it drives the two meshing internal gear plates 104 to rotate, and the two internal gear plates 104 drive the two rotating frames 3 to rotate to achieve rotation drive.

[0034] Specifically, the rotating support mechanism includes a plurality of support rods 201 fixedly connected to the outer wall of the mounting frame 1 at equal intervals and a sliding groove 203 opened on the inner wall of the two rotating frames 3. The support rods 201 are fixedly connected with a sliding ball 202 away from the end wall of the mounting frame 1. The two sliding grooves 203 are combined into a rotating groove, and the sliding ball 202 is slidably connected in the two sliding grooves 203 that form the rotating groove.

[0035] In this embodiment, see the attached Figure 1 The rotation support mechanism is composed of a plurality of sliding balls 202 extending into two sliding grooves 203 to achieve rotation support.

[0036] Specifically, the collision object detection mechanism includes a support frame 301 fixedly connected to the side wall of a rotating frame 3 away from the other rotating frame 3, a mounting port is opened at the bottom of the support frame 301, and a fixed frame 304 is fixedly connected to the mounting port, and a plurality of movable frames 302 are arranged at equal intervals from top to bottom inside the support frame 301 and above the fixed frame 304, and a movable supporting mechanism is respectively installed between the lowest movable frame 302 and the fixed frame 304 and between two adjacent movable frames 302, and a mobile driving mechanism is installed between the fixed frame 304 and the movable frame 302 and the support frame 301, and a plurality of laser ranging sensors 303 are fixedly embedded at equal intervals on the movable frame 302. When the fixed frame 304 and the plurality of movable frames 302 are unfolded, they are the same length as the boom, and the detection range of the plurality of laser ranging sensors 303 is fully covered, and the mobile driving mechanism and the laser ranging sensors 303 are electrically connected to the tower crane control system.

[0037] In this embodiment, see the attached Figure 1-5 The collision object detection mechanism is controlled by the tower crane control system to start the mobile driving mechanism, and the mobile driving mechanism drives the uppermost movable frame 302 to extend through the movable movement of the movable support mechanism. When the uppermost movable frame 302 extends to the limit position, it drives the second lower movable frame 302 to move to the movable movable extension position, and the second lower movable frame 302 extends through the movable movement of the movable support mechanism, and so on, until all the movable frames 302 extend to the limit position and stop. At this time, the length is the same as the boom. The tower crane control system controls several laser ranging sensors 303 to start, and several laser ranging sensors 303 emit laser signals, measure the time from the laser signal being emitted to being reflected back to the sensor, and calculate the distance between the target object and the sensor to detect whether there is an obstacle. If there is no collision object, no action is taken. If there is a collision object, the information is transmitted to the tower crane control system for early warning to achieve obstacle detection.

[0038] Specifically, the movable support mechanism includes two movable rods 401 symmetrically fixed to the bottom end of the movable frame 302 and two movable grooves 402 symmetrically opened on the fixed frame 304, the bottom and the top of the middle movable frame 302. The two movable rods 401 are located away from the movable side, and a fixed rod 403 is fixed inside the movable groove 402. The movable rod 401 is movably connected to the fixed rod 403 through an open hole socket connection.

[0039] In this embodiment, see the attached Figure 3 and 4 The movable support mechanism is composed of two movable rods 401 sliding on two fixed rods 403 to realize the supporting and movable function of the movable frame 302.

[0040] Specifically, the mobile driving mechanism includes a second motor 501 fixed to the bottom end of the support frame 301, a first driving shaft 503 arranged inside the support frame 301, and a plurality of racks 504 fixed to the side wall of the fixed frame 304 and the movable frame 302. The first driving shaft 503 is located on one side of the fixed frame 304 and the movable frame 302. The bottom end of the first driving shaft 503 is connected to the output end of the second motor 501 through a coupling, and the top end is connected to the top wall of the support frame 301 through a bearing. The first driving shaft 503 is located on the support frame. The second gears 502 are fixedly connected to the corresponding positions of the fixed frame 304 and the movable frame 302 inside 301. In the initial state, the top second gear 502 is meshed and connected with the rack 504 of the top movable frame 302, and the other second gears 502 are not meshed and connected with the rack 504. As the top movable frame 302 moves to the extreme position, the second gear 502 at the bottom is meshed and connected with the rack 504 of the second movable frame 302 at the bottom. And so on. The second motor 501 is electrically connected to the tower crane control system.

[0041] In this embodiment, see the attached Figure 3-5 The mobile driving mechanism is controlled by the tower crane control system to start the second motor 501, and the second motor 501 drives the output end to rotate, driving the connected first driving shaft 503 to rotate, and the connected first driving shaft 503 drives the connected several second gears 502 to rotate. During the rotation of the several second gears 502, the uppermost second gear 502 drives the meshed uppermost rack 504 to move, and the uppermost rack 504 drives the connected uppermost movable frame 302 to move until the uppermost movable frame 302 moves to the extreme position. At this time, the rack 504 of the second lower movable frame 302 is meshed and connected with the second lower second gear 502, and the second lower second gear 502 drives the meshed next lower rack 504 to move, and the next lower rack 504 drives the connected next lower movable frame 302 to move until the next lower movable frame 302 moves to the extreme position, and the rack 504 of the next lower movable frame 302 is meshed and connected with the next lower second gear 502, and so on, until all movable frames 302 move to the extreme position, so as to realize the mobile drive of the movable frame 302.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-collision mechanism for a tower crane, characterized in that , comprising: two mounting frames (1) symmetrically arranged on both sides of a tower crane lifting sleeve, the two mounting frames (1) are located below the boom, the two mounting frames (1) are arranged in a rectangular shape with the inner wall thereof fitting the outer wall of the lifting sleeve, a plurality of mounting screws (2) are threadedly connected at equal intervals on the mounting frames (1), the two mounting frames (1) are fixed to the lifting sleeve by the plurality of mounting screws (2), two rotating frames (3) are symmetrically arranged on the outer sides of the two mounting frames (1), the two rotating frames (3) are arranged in a ring shape, the two rotating frames (3) and the two mounting frames (1) are equipped with a rotation drive mechanism and a rotation support mechanism, a side wall of one rotating frame (3) away from the other rotating frame (3) is equipped with a collision object detection mechanism, and the rotation drive mechanism and the collision object detection mechanism are electrically connected to the tower crane control system.

2. The anti-collision mechanism for a tower crane according to claim 1, characterized in that: The rotary drive mechanism comprises a mounting plate (101) fixedly connected to a side wall of one mounting frame (1) away from the other mounting frame (1) and two inner tooth plates (104) fixedly connected to the bottom ends of the two rotating frames (3); a first motor (102) is fixedly connected to the top end of the mounting plate (101); an output end of the first motor (102) passes through the mounting plate (101) and extends to the bottom and is fixedly sleeved with a first gear (103); the two inner tooth plates (104) form an inner gear ring; the first gear (103) is meshedly connected to the two inner tooth plates (104) forming the inner gear ring; and the first motor (102) is electrically connected to a tower crane control system.

3. The anti-collision mechanism for a tower crane according to claim 2, characterized in that: The rotary support mechanism comprises a plurality of support rods (201) fixedly connected to the outer wall of the mounting frame (1) at equal intervals and a sliding groove (203) provided on the inner wall of the two rotating frames (3); the support rods (201) are fixedly connected to a sliding ball (202) away from the end wall of the mounting frame (1); the two sliding grooves (203) are combined into a rotating groove; and the sliding ball (202) is slidably connected in the two sliding grooves (203) combined into the rotating groove.

4. The anti-collision mechanism for a tower crane according to claim 3, characterized in that: The collision object detection mechanism comprises a support frame (301) fixedly connected to a side wall of a rotating frame (3) away from another rotating frame (3), a mounting opening is provided at the bottom end of the support frame (301), and a fixed frame (304) is fixedly connected to the mounting opening, a plurality of movable frames (302) are arranged at equal intervals from top to bottom inside the support frame (301) and above the fixed frame (304), the bottom movable frame (302) and the fixed frame (304) are connected, and the space between two adjacent movable frames (302) is respectively The invention is equipped with a movable supporting mechanism, a mobile driving mechanism is installed between the fixed frame (304) and the movable frame (302) and the supporting frame (301), a plurality of laser ranging sensors (303) are fixedly embedded at equal intervals on the movable frame (302), and after the fixed frame (304) and the plurality of movable frames (302) are unfolded, the length is the same as the boom, and the detection range of the plurality of laser ranging sensors (303) is fully covered, and the mobile driving mechanism and the laser ranging sensors (303) are electrically connected to the tower crane control system.

5. The anti-collision mechanism for a tower crane according to claim 4, characterized in that: The movable support mechanism comprises two movable rods (401) symmetrically fixed to the bottom end of the movable frame (302) and two movable grooves (402) symmetrically opened on the fixed frame (304), the bottom and the top of the middle movable frame (302), the two movable rods (401) are located away from the movable side, the movable groove (402) is fixed with a fixed rod (403) inside, and the movable rod (401) is movably connected to the fixed rod (403) by means of an open hole sleeve connection.

6. The anti-collision mechanism for a tower crane according to claim 5, characterized in that: The mobile driving mechanism comprises a second motor (501) fixed to the bottom end of the support frame (301), a first driving shaft (503) arranged inside the support frame (301), and a plurality of racks (504) fixed to a side wall of the fixed frame (304) and the movable frame (302), wherein the first driving shaft (503) is located on one side of the fixed frame (304) and the movable frame (302), the bottom end of the first driving shaft (503) is connected to the output end of the second motor (501) through a coupling, and the top end is connected to the top wall of the support frame (301) through a bearing, and the first driving shaft (503) is located on the support frame. The second gears (502) are fixedly sleeved at the corresponding positions of the fixed frame (304) and the movable frame (302) inside (301). In the initial state, the uppermost second gear (502) is meshed and connected with the rack (504) of the uppermost movable frame (302), and the other second gears (502) are not meshed and connected with the rack (504). As the uppermost movable frame (302) moves to the extreme position, the second gear (502) at the lowermost level is meshed and connected with the rack (504) of the lowermost movable frame (302). Similarly, the second motor (501) is electrically connected to the tower crane control system.

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