阅读说明：本技术 一种塔吊作业中塔机回转限位器 (Tower crane rotation limiter in tower crane operation ) 是由 阮仁祥 汪晴容 易永梅 李欣蓉 杨晓成 毕义成 于 2021-01-27 设计创作，主要内容包括：本发明公开了一种塔吊作业中塔机回转限位器,包括上下分布设置的转动座和底座,底座顶部通过外齿回转支撑转动连接转动座底部,外齿回转支撑的外圈上啮合连接驱动齿轮,驱动齿轮通过驱动轴竖向转动安装在限位器安装架内,驱动轴上下端安装有两个限位装置,限位装置包括内圈与驱动轴外壁固定连接的轴承,轴承外圈上可转动连接一个齿圈,齿圈内壁均匀分布多个方向一致的卡齿,轴承内圈的内壁上连接多个限位棘齿结构,限位棘齿结构向齿圈内壁延伸、并与卡齿配合；上下两个限位装置上的卡齿方向相反。本发明中上下两个限位装置上的卡齿方向相反,因此当上下不同位置的限位装置上的齿圈转动时,能够带动驱动轴以不同方向转动。(The invention discloses a tower crane rotation limiter in tower crane operation, which comprises a rotation seat and a base which are distributed up and down, wherein the top of the base is rotationally connected with the bottom of the rotation seat through an external tooth rotation support; the latch directions on the upper and lower limiting devices are opposite. The directions of the clamping teeth on the upper limiting device and the lower limiting device are opposite, so that when gear rings on the upper limiting device and the lower limiting device at different positions rotate, the driving shaft can be driven to rotate in different directions.)

1. The utility model provides a tower crane gyration stopper in tower crane operation, includes rotation seat (102) and base (101) that distribute the setting from top to bottom, rotates one side fixed connection mounting bracket (103) of seat (102), its characterized in that: the top of the base (101) is rotatably connected with the bottom of the rotating seat (102) through an external tooth rotating support (2), the outer ring of the external tooth rotating support (2) is meshed with a driving gear (3), the driving gear (3) is vertically and rotatably installed in a stopper installation frame (104) through a driving shaft (301), and the stopper installation frame (104) is fixedly connected with the other side of the base (101);

two limiting devices (4) are mounted at the upper end and the lower end of the driving shaft (301), each limiting device (4) comprises a bearing (42) with an inner ring fixedly connected with the outer wall of the driving shaft (301), an outer ring of the bearing (42) is rotatably connected with a gear ring (41), a plurality of clamping teeth (4101) with the same direction are uniformly distributed on the inner wall of the gear ring (41), a plurality of limiting ratchet structures (43) are connected on the inner wall of the inner ring of the bearing (42), and the limiting ratchet structures (43) extend towards the inner wall of the gear ring (41) and are matched with the clamping teeth (4101);

the direction of the latch (4101) on the upper and lower limiting devices (4) is opposite;

install drive assembly (5) in stopper mounting bracket (104) in stop device (4) outside, drive assembly (5) include horizontal installation first pneumatic cylinder (52) in stopper mounting bracket (104), the drive end rigid coupling of first pneumatic cylinder (52) has adjustable shelf (51), have carriage (53) along its length direction slidable mounting in adjustable shelf (51), parallel mounting has drive link joint (54) in carriage (53), ring gear (41) swing joint on drive link joint (54) and stop device (4), and carriage (53) one side is through second pneumatic cylinder (55) and adjustable shelf (51) tip rigid coupling.

2. The tower crane rotation limiter in tower crane operation of claim 1, wherein: the inner ring of the external tooth rotary support (2) is fixedly connected with the top of the base (101), and the outer ring of the external tooth rotary support (2) is fixedly connected with the bottom of the rotating seat (102).

3. The tower crane rotation limiter in tower crane operation of claim 1, wherein: stopper mounting bracket (104) are hollow cavity structure, through bolt fixed mounting on base (101), installation bearing (302) of drive shaft (301) middle part rigid coupling, installation bearing (302) and stopper mounting bracket (104) inner wall rigid coupling.

4. The tower crane rotation limiter in tower crane operation of claim 1, wherein: the outer wall of the driving shaft (301) is fixedly connected with a plurality of connecting pieces (303) extending outwards, and the outer ends of the connecting pieces (303) are fixedly connected with the inner ring of the bearing (42).

5. The tower crane rotation limiter in tower crane operation of claim 1, wherein: the gear ring (41) is positioned on one side close to the inner ring of the bearing (42), a plurality of connecting sliders (4201) extend towards the gear ring (41) on the outer ring of the bearing (42), and the connecting sliders (4201) are clamped in an annular sliding groove (4102) formed in the end face of the gear ring (41) in a sliding mode.

6. The tower crane rotation limiter in tower crane operation of claim 1, wherein: the limiting ratchet structure (43) comprises a mounting shaft (432) fixedly mounted on an inner ring of a bearing (42), the mounting shaft (432) is rotatably connected with a ratchet (431), the ratchet (431) is matched with a clamping tooth (4101) on the inner wall of a gear ring (41), a torsion spring (433) is wound on the mounting shaft (432), one end of the torsion spring (433) is connected with the ratchet (431), the other end of the torsion spring is connected with the mounting shaft (432), and the ratchet (431) is attached to the clamping tooth (4101) under the action of the torsion spring (433).

7. The tower crane rotation limiter in tower crane operation of claim 1, wherein: be equipped with in stopper mounting bracket (104) and be used for the gliding spacing chamber of adjustable shelf (51), stopper mounting bracket (104) is at spacing intracavity horizontal slip, the dovetail has been seted up towards one side of ring gear (41) on adjustable shelf (51), carriage (53) bottom install with dovetail complex dovetail block, carriage (53) slide along its length direction on adjustable shelf (51).

Technical Field

The invention relates to the technical field of tower crane equipment, in particular to a tower crane rotation limiter in tower crane operation.

Background

The tower crane is a hoisting device which is widely applied in building construction, and a crane arm rotates in a horizontal plane by a slewing mechanism, so that a lifting hook can cover a working surface. The crane boom of the tower crane is long, and the wind resistance of the crane boom side of the tower crane is far greater than that of the balance boom side, so that the tower crane can be easily blown to rotate by trapped wind during installation, construction, jacking operation and dismantling. Under increasingly complex construction conditions, the situation that a crane boom interferes with surrounding obstacles often occurs, and even more serious safety accidents are caused.

The slewing motion is generated by respectively installing an upper support and a lower support in the foreign countries of the slewing bearing through a slewing motor to drive a pinion, wherein the pinion is in wedging fit with a gear wheel of the slewing bearing to drive a slewing upper support to perform slewing motion relative to the lower support. Therefore, the tower crane rotation limiter in tower crane operation is provided for solving the problems.

Disclosure of Invention

The invention aims to provide a tower crane rotation limiter in tower crane operation, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a tower crane rotation limiter in tower crane operation comprises a rotation seat and a base which are distributed vertically, wherein one side of the rotation seat is fixedly connected with a mounting frame, the top of the base is rotatably connected with the bottom of the rotation seat through an external tooth rotation support, the outer ring of the external tooth rotation support is meshed with a driving gear, the driving gear is vertically rotatably mounted in the limiter mounting frame through a driving shaft, and the limiter mounting frame is fixedly connected with the other side of the base;

the upper end and the lower end of the driving shaft are provided with two limiting devices, each limiting device comprises a bearing, an inner ring of which is fixedly connected with the outer wall of the driving shaft, a gear ring is rotatably connected to the outer ring of the bearing, a plurality of clamping teeth with the same direction are uniformly distributed on the inner wall of the gear ring, a plurality of limiting ratchet structures are connected to the inner wall of the inner ring of the bearing, and the limiting ratchet structures extend towards the inner wall of the gear ring and are matched with the clamping teeth;

the directions of the clamping teeth on the upper limiting device and the lower limiting device are opposite;

install drive assembly in the stopper mounting bracket in the stop device outside, drive assembly includes the first pneumatic cylinder of horizontal installation in the stopper mounting bracket, the drive end rigid coupling of first pneumatic cylinder has the adjustable shelf, there is the carriage along its length direction slidable mounting in the adjustable shelf, parallel mounting has the drive link joint in the carriage, the ring gear swing joint on drive link joint and the stop device, and carriage one side is through second pneumatic cylinder and adjustable shelf end rigid coupling.

Preferably, the inner ring of the external tooth rotary support is fixedly connected with the top of the base, and the outer ring of the external tooth rotary support is fixedly connected with the bottom of the rotating seat.

Preferably, the stopper mounting bracket is of a hollow cavity structure and is fixedly mounted on the base through bolts, the middle of the driving shaft is fixedly connected with a mounting bearing, and the mounting bearing is fixedly connected with the inner wall of the stopper mounting bracket.

Preferably, the outer wall of the driving shaft is fixedly connected with a plurality of connecting pieces extending outwards, and the outer ends of the connecting pieces are fixedly connected with the inner ring of the bearing.

Preferably, the gear ring is located at one side close to the inner ring of the bearing, a plurality of connecting sliding blocks extend towards the gear ring on the outer ring of the bearing, and the connecting sliding blocks are slidably clamped in annular sliding grooves formed in the end face of the gear ring.

Preferably, the limit ratchet structure comprises an installation shaft fixedly installed on the bearing inner ring, the installation shaft is rotatably connected with a ratchet, the ratchet is matched with a clamping tooth on the inner wall of the gear ring, a torsion spring is wound on the installation shaft, one end of the torsion spring is connected with the ratchet, the other end of the torsion spring is connected with the installation shaft, and the ratchet is attached to the clamping tooth under the action of the torsion spring.

Preferably, be equipped with in the stopper mounting bracket and be used for the gliding spacing chamber of adjustable shelf, the stopper mounting bracket is at spacing intracavity horizontal slip, the dovetail has been seted up towards one side of ring gear on the adjustable shelf, the carriage bottom install with dovetail complex dovetail block, the carriage slides along its length direction on the adjustable shelf.

Compared with the prior art, the invention has the beneficial effects that:

when the driving chain plate is meshed with the gear ring, the rotation of the gear ring is limited by the driving chain plate, the second hydraulic cylinder drives the driving chain plate to reciprocate on the movable frame, so that the gear ring rotates forwards and backwards repeatedly, and when the rotation direction of the gear ring is limited by the limiting ratchet structure, the bearing inner ring is driven to rotate, so that the driving shaft rotates, the number of rotating circles of the driving shaft is controlled, and the tower crane accident caused by the fact that the rotating angle of the external tooth rotary support is too large is prevented.

When the driving chain plate is not meshed with the gear ring, the limiting device can rotate freely without limitation;

the latch directions on the upper limiting device and the lower limiting device are opposite, so that when gear rings on the limiting devices at the upper position and the lower position rotate, the driving shaft can be driven to rotate in different directions.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation of the position limiting device of the present invention;

FIG. 3 is a schematic view of a structure of a position limiting device according to the present invention;

FIG. 4 is a schematic view of the internal structure of the position limiting device according to the present invention;

FIG. 5 is a schematic view of an explosion structure of the position limiting device according to the present invention;

FIG. 6 is a schematic view of a limiting ratchet according to the present invention;

in the figure: 101, 102, 103, 104, 2, 3, 301, 302, a driving shaft, 303 and a connecting piece;

4, a limiting device: 41 gear ring, 4101 latch, 4102 annular sliding groove, 42 bearing, 4201 connecting slide block, 43 limit ratchet structure: 431 ratchet, 432 mounting shaft, 433 torsion spring;

5, a driving component: the movable frame 51, the first hydraulic cylinder 52, the sliding frame 53, the sliding frame 54 drive the chain plate, and the second hydraulic cylinder 55.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a tower crane gyration stopper in tower crane operation, includes rotation seat 102 and the base 101 that distributes from top to bottom and set up, rotates one side fixed connection mounting bracket 103 of seat 102, and base 101 top is supported 2 rotations through the outer tooth gyration and is connected rotation seat 102 bottom, and the outer tooth gyration is supported 2 inner circle fixed connection base 101 top, and the outer lane and the rotation seat 102 bottom fixed connection of outer tooth gyration support 2. The rotating seat 102 and the base 101 are connected through an external tooth rotating support 2 in the prior art, which belongs to the conventional technology in the field and ensures the stability of the connection between the rotating seat 102 and the base 101.

Meshing connection drive gear 3 on the outer lane of external tooth gyration support 2, drive gear 3 passes through drive shaft 301 vertical rotation and installs in stopper mounting bracket 104, stopper mounting bracket 104 and base 101's opposite side rigid coupling, wherein, stopper mounting bracket 104 is hollow cavity structure, through bolt fixed mounting on base 101, installation bearing 302 of drive shaft 301 middle part rigid coupling, installation bearing 302 and stopper mounting bracket 104 inner wall rigid coupling. The limiter mount 104 is used to mount a limiting device.

Two limiting devices 4 are installed at the upper end and the lower end of the driving shaft 301, each limiting device 4 comprises a bearing 42 fixedly connected with the outer wall of the driving shaft 301 through an inner ring, a gear ring 41 is rotatably connected to the outer ring of the bearing 42, a plurality of clamping teeth 4101 with the same direction are uniformly distributed on the inner wall of the gear ring 41, a plurality of limiting ratchet structures 43 are connected to the inner wall of the inner ring of the bearing 42, and the limiting ratchet structures 43 extend towards the inner wall of the gear ring 41 and are matched with the clamping teeth 4101.

The limiting ratchet structure 43 comprises a mounting shaft 432 fixedly mounted on an inner ring of the bearing 42, a ratchet 431 is rotatably connected to the mounting shaft 432, the ratchet 431 is matched with a latch 4101 on the inner wall of the gear ring 41, a torsion spring 433 is wound on the mounting shaft 432, one end of the torsion spring 433 is connected with the ratchet 431, the other end of the torsion spring is connected with the mounting shaft 432, and the ratchet 431 is attached to the latch 4101 under the action of the torsion spring 433.

Further, in order to ensure the stability of the connection between the inner ring of the bearing 42 and the driving shaft 301, a plurality of connecting members 303 extending outwards are fixedly connected to the outer wall of the driving shaft 301, and the outer ends of the connecting members 303 are fixedly connected with the inner ring of the bearing 42.

Further, in order to ensure the connection between the outer ring of the bearing 42 and the ring gear 41 and not affect the free rotation of the ring gear 41, a plurality of connecting sliders 4201 extend from the outer ring of the bearing 42 toward the ring gear 41, and the connecting sliders 4201 are slidably engaged with the annular slide groove 4102 formed in the end surface of the ring gear 41.

More importantly: the direction of the latch 4101 on the upper and lower position-limiting devices 4 is opposite, so that when the gear ring 41 on the position-limiting devices 4 at different positions rotates, the driving shaft 301 can be driven to rotate in different directions.

Install drive assembly 5 in the stopper mounting bracket 104 in the stop device 4 outside, drive assembly 5 includes the first pneumatic cylinder 52 of horizontal installation in stopper mounting bracket 104, the drive end rigid coupling of first pneumatic cylinder 52 has adjustable shelf 51, there is carriage 53 along its length direction slidable mounting in the adjustable shelf 51, parallel mounting has drive link joint 54 in carriage 53, drive link joint 54 and the ring gear 41 swing joint on the stop device 4, and carriage 53 one side is through second pneumatic cylinder 55 and adjustable shelf 51 tip rigid coupling.

Be equipped with in the stopper mounting bracket 104 and be used for the gliding spacing chamber of adjustable shelf 51, stopper mounting bracket 104 horizontal slip in spacing intracavity, one side towards ring gear 41 has seted up the dovetail on adjustable shelf 51, carriage 53 bottom install with dovetail complex forked tail piece, carriage 53 slides along its length direction on adjustable shelf 51.

According to the invention, two driving assemblies 5 are arranged, the upper limiting device 4 and the lower limiting device 4 are respectively driven, the first hydraulic cylinder 52 controls whether the driving chain plate 54 is meshed with the gear ring 41, and when the driving chain plate 54 is not meshed with the gear ring 41, the limiting devices 4 can freely rotate without limitation;

when the driving chain plate 54 is meshed with the gear ring 41, the rotation of the gear ring 41 is limited by the driving chain plate 54, the second hydraulic cylinder 55 drives the driving chain plate 54 to reciprocate on the movable frame 51, so that the gear ring 41 rotates forwards and backwards repeatedly, when the rotation direction of the gear ring 41 is limited by the limiting ratchet structure 43, the inner ring of the bearing 42 is driven to rotate, so that the driving shaft 301 rotates, the number of rotating circles of the driving shaft 301 is controlled, the driving shaft 301 is prevented from rotating too many circles, and the rotation angle of the external tooth rotary support 3 is too large, so that a tower crane accident occurs.

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