CN214935570U

CN214935570U - Counterweight device and crane

Info

Publication number: CN214935570U
Application number: CN202121272051.1U
Authority: CN
Inventors: 邹一岚; 贾胜超; 徐明振
Original assignee: Sany America Inc
Current assignee: Zhejiang Sany Equipment Co Ltd; Sany America Inc
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-11-30
Anticipated expiration: 2031-06-08

Abstract

The utility model relates to an engineering machine tool technical field provides a counter weight device and hoist. The counterweight device comprises a counterweight tray, a connecting frame and a telescopic mechanism, wherein the connecting frame comprises a connecting rod; but telescopic machanism's stiff end and revolving stage rotatable coupling, just be the position setting from top to bottom between the first end of connecting rod and telescopic machanism's the stiff end, the first end and the revolving stage rotatable coupling of connecting rod, but the second end of connecting rod and telescopic machanism's flexible end rotatable coupling, the second end of connecting rod still is connected with the counter weight tray. The counter weight device can drive the connecting rod to rotate relative to the rotary table through the telescopic mechanism so as to drive the counter weight tray to be close to or far away from the rotary table, and the reduction or increase of the counter weight moment is realized. When the moment is insufficient, the movable tray is far away from the rotary table, the arm lifting capacity and the working condition loading capacity of the arm support are improved, and the stability and the safety of the whole vehicle are enhanced. The counterweight tray can be grounded to bear part of the weight of the counterweight by using the ground, so that the load of the rotary supporting structure is reduced.

Description

Counterweight device and crane

Technical Field

The utility model relates to an engineering machine tool technical field especially relates to a counter weight device and hoist.

Background

In the crane operation process, in order to improve the hoisting efficiency and be limited by the limitation of the size of a working site, a crane without a super-lift counterweight is generally adopted for hoisting. For example, hanging additional weights are used for hoisting. However, since the working load that the supporting structure of the turntable and the turntable can bear is limited, and the position of the hanging type additional counterweight tray is fixed, the arm lifting capacity and the hanging capacity of the crane are greatly limited under the condition of not changing the counterweight, and the capacity of the arm support cannot be fully exerted.

SUMMERY OF THE UTILITY MODEL

The utility model provides a counter weight device and hoist for the problem that the jib loading ability and the lifting capacity of the hoist of the additional counter weight of adoption articulate among the solution prior art receive great restriction.

The utility model provides a counterweight device, which is arranged on a turntable of a crane and comprises a counterweight tray, a connecting frame and a telescopic mechanism, wherein the connecting frame comprises a connecting rod;

but telescopic machanism's stiff end with revolving stage rotatable coupling, the first end of connecting rod with revolving stage rotatable coupling, just the first end of connecting rod with but telescopic machanism's stiff end is upper and lower position setting between, the second end of connecting rod with telescopic machanism's flexible end rotatable coupling, the second end of connecting rod still with the counter weight tray is connected.

According to the utility model provides a pair of counter weight device, the link still includes the mount, mount fixed mounting in the revolving stage, the first end of connecting rod with mount rotatable coupling.

According to the utility model provides a pair of counter weight device, the mount includes first support and second support, first support the second support with the revolving stage links to each other and forms triangular supports structure.

According to the utility model provides a pair of counterweight device, telescopic machanism's stiff end rotatable install in the mount.

According to the utility model provides a pair of counter weight device still includes the connecting piece, the one end of connecting piece with the second end of connecting rod is connected, the other end of connecting piece with the counter weight tray is connected.

According to the utility model provides a pair of counter weight device, the connecting piece includes the propeller strut, the upper end of propeller strut with the second end of connecting rod links to each other, the lower extreme of propeller strut with counter weight tray fixed connection.

According to the utility model provides a pair of counter weight device, the connecting piece is still including connecting the arm-tie, connect the first end of arm-tie with the second of connecting rod holds rotatable coupling, connect the second of arm-tie hold with the upper end rotatable coupling of propeller strut.

According to the counterweight device provided by the utility model, the connecting rods are multiple, and are arranged at the tail part of the rotary table along the horizontal direction;

the number of the telescopic mechanisms is multiple, and the plurality of telescopic mechanisms are connected with the plurality of connecting rods in a one-to-one correspondence manner;

or the telescopic mechanism further comprises a connecting rod, the connecting rods are connected with each other through the connecting rod, and the telescopic end of the telescopic mechanism is rotatably connected with the connecting rod.

The utility model also provides a crane, including revolving stage and any kind of above-mentioned counter weight device, the counter weight device install in the revolving stage.

According to the utility model provides a pair of hoist still includes distance sensor and controller, distance sensor install in the counter weight device is used for detecting the extension distance of telescopic machanism's flexible end, distance sensor with telescopic machanism respectively with controller signal connection.

The utility model provides a counter weight device and hoist through setting up telescopic machanism and having the link's link to rotate through the relative revolving stage of telescopic machanism drive connecting rod, be close to or keep away from the revolving stage at the certain limit for drive counter weight tray, realize reducing or increasing of counter weight moment. When the moment is insufficient, the movable tray is far away from the rotary table, so that the arm lifting capacity and the working condition loading capacity of the arm support are improved, and the stability and the safety of the whole vehicle are enhanced. The connecting rod with proper length can be designed according to the height of the rotary table relative to the ground, so that the connecting rod can rotate relative to the rotary table until the counterweight tray lands on the ground, partial weight of the counterweight can be born by the ground, and the load of the rotary supporting structure is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a counterweight device according to an embodiment of the present invention;

fig. 2 is a schematic view of a counterweight device according to a second embodiment of the present invention in a first state;

fig. 3 is a schematic view of a second state of the counterweight device according to the second embodiment of the present invention;

reference numerals:

1. a turntable; 21. A counterweight tray; 22. A connecting frame;

221. a connecting rod; 222. A fixed mount; 23. A retractable mechanism;

24. a connecting member; 241. Connecting a pulling plate; 242. A herringbone frame;

3. and (4) the ground.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for clearly indicating the numbering of the product parts and do not represent any substantial difference unless explicitly stated or limited otherwise. The directions of "up" and "down" are all based on the directions shown in the drawings. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The counterweight device of the present invention will be described with reference to fig. 1 to 3.

Fig. 1 is a schematic structural diagram of a counterweight device according to an embodiment of the present invention. The utility model provides a counter weight device installs in revolving stage 1 of hoist, and this counter weight device includes counter weight tray 21, link 22 and telescopic machanism 23. The link frame 22 includes a link rod 221. The fixed end of the telescopic mechanism 23 is rotatably connected with the turntable 1, and the first end of the connecting rod 221 is rotatably connected with the turntable 1. The first end of the link 221 and the fixed end of the retractable mechanism 23 are vertically disposed. The second end of the connecting rod 221 is rotatably connected with the telescopic end of the telescopic mechanism 23, and the second end of the connecting rod 221 is further connected with the counterweight tray 21. Wherein, the retractable mechanism 23 can be a retractable oil cylinder or an air cylinder.

Specifically, as shown in fig. 1, the link 221 has a first end rotatably connected to the turntable 1 and a second end remote from the turntable, and the telescopic mechanism 23 has a fixed end rotatably connected to the turntable 1 and a telescopic end remote from the turntable 1. The second end of the link 221 is hinged to the telescopic end of the telescopic mechanism 23. It should be noted that the telescopic mechanism 23 may be installed in the reverse way, that is, its telescopic end is rotatably connected to the turntable 1, and its fixed end is hinged to the connecting rod 221.

The connection point between the first end of the link 221 and the turntable 1 is a first connection point, and the connection point between the fixed end of the telescopic mechanism 23 and the turntable 1 is a second connection point. The first and second connection points are arranged in a vertical orientation on the turntable 1, i.e. the first connection point is located above the second connection point or the second connection point is located above the first connection point. Optionally, a connection line between the first connection point and the second connection point is arranged in a vertical direction, that is, the first connection point is located right above the second connection point or the second connection point is located right above the first connection point.

The first end of the link 221 and the fixed end of the retractable mechanism 23 are vertically disposed. The first end including the link 221 is located above the fixed end of the telescopic mechanism 23, or the fixed end of the telescopic mechanism 23 is located above the first end of the link 221. As shown in fig. 1, the retractable mechanism 23, the link 221 and the turntable 1 are connected to form a variable triangular structure, and the second end of the link 221 is pushed to rotate around the first end thereof by the retractable movement of the retractable mechanism 23. The motion locus of the second end of the connecting rod 221 is an arc with the first end as the center of a circle and the length of the connecting rod 221 as the radius. The counterweight tray 21 is connected to the second end of the connecting rod 221, so that the counterweight tray 21 can move in the vertical direction and back and forth relative to the turntable 1 under the driving of the connecting rod 221. Specifically, as the second end of the link 221 rotates from a position horizontal to the first end thereof to the lowermost limit position, the weight tray 21 gets closer to the turntable 1 and gradually decreases in height. When the counterweight needs to be placed on the ground 3, the connecting rod 221 can be driven to rotate downwards through the telescopic mechanism 23. When the distance between the counterweight and the turntable 1 needs to be increased, the connecting rod 221 can be driven to move upwards through the telescopic mechanism 23.

The utility model provides a counter weight device is through setting up telescopic machanism 23 and having the link 22 of connecting rod 221 to rotate through the relative revolving stage of telescopic machanism 23 drive connecting rod 221, be close to or keep away from the revolving stage at certain limit for drive counter weight tray 21, realize reducing or increasing of counter weight moment. When the moment is insufficient, the movable tray is far away from the rotary table, so that the arm lifting capacity and the working condition loading capacity of the arm support can be improved, and the stability and the safety of the whole vehicle are enhanced. The link 221 of a suitable length may be designed according to the height of the turntable 1 with respect to the ground 3 so that the link 221 can be rotated with respect to the turntable 1 until the counterweight tray 21 lands to bear a part of the weight of the counterweight by the ground 3, reducing the load of the slewing support structure.

In the embodiment of the present invention, the number of the connecting rods 221 may be one or more. A plurality of links 221 are arranged in the horizontal direction at the rear of the turntable 1.

In one embodiment, the number of the retractable mechanisms 23 is also multiple, the number of the retractable mechanisms 23 is the same as the number of the connecting rods 221, and the plurality of retractable mechanisms 23 are connected to the plurality of connecting rods 221 in a one-to-one correspondence manner. The specific number of the links 221 may be determined according to the length of the weight tray 21 in the arrangement direction of the links 221 and the weight of the weight.

In another embodiment, the counterweight device further comprises a connecting rod (not shown), and the plurality of connecting rods 221 are connected with each other through the connecting rod. The telescopic end of the telescopic mechanism 23 is rotatably connected with the connecting rod. The number of the retractable mechanism 23 may be plural or plural. For example, the second ends of the two links 221 are fixedly connected to a connecting rod, and the telescopic end of the telescopic mechanism 23 is located between the two links 221, so that the two links 221 are driven to rotate simultaneously by driving the connecting rod. The number of the links 221 and the telescopic mechanisms 23 may be configured according to actual needs.

In the embodiment of the present invention, as shown in fig. 2, the second state diagram of the counterweight device according to the second embodiment of the present invention is shown, as shown in fig. 3, the second state diagram of the counterweight device according to the second embodiment of the present invention is shown. In the embodiment of the present invention, the connection frame 22 further includes a fixing frame 222, the fixing frame 222 is fixedly installed on the rotary table 1, and the first end of the connecting rod 221 is rotatably connected to the fixing frame 222. That is, the connecting rod 221, the telescopic mechanism 23 and the fixing frame 222 are connected to form a variable triangle structure, and the second end of the connecting rod 221 is pushed to rotate around the first end thereof by the telescopic movement of the telescopic mechanism 23.

Specifically, as shown in fig. 2, the telescopic end of the telescopic mechanism is contracted to make the link 221 reach a horizontal state, and as shown in fig. 3, the telescopic end of the telescopic mechanism 23 is extended to drive the link 221 to reach a vertical state. The fixing bracket 222 includes a first end fixedly coupled to the turntable 1 and a second end rotatably coupled to a first end of the link 221. The second end of the holder 222 is remote from the turntable 1 with respect to the first end thereof. By providing the fixing bracket 222, the distance between the first end of the link 221 and the turntable 1 is longer than the distance between the fixed end of the telescopic mechanism 23 and the turntable 1.

In this manner, the telescopic mechanism 23 can drive the link 221 to rotate between the vertical state shown in fig. 2 and the horizontal state shown in fig. 3, and even the link 221 can rotate from the vertical state shown in fig. 2 to a direction closer to the turntable 1. So that a larger displacement in the horizontal direction can be achieved by the shorter link 221. Compared to the structure of the counterweight device shown in fig. 1, the structure of the counterweight device in this embodiment can obtain a larger distance of displacement in the horizontal direction under the condition that the length of the connecting rod 221 is the same and the counterweight on the counterweight tray 21 is ensured not to collide with the turntable 1.

As shown in fig. 2 and 3, in the embodiment of the present invention, the fixing frame 222 includes a first bracket and a second bracket, and the first bracket, the second bracket and the turntable 1 are connected to form a triangular supporting structure. The first end of the connecting rod 221 is hinged with the end of the triangular bracket. The second end of the link 221 is hinged to the telescopic mechanism 23. Or the triangular support further comprises a third support, the first support, the second support and the third support are connected in an end-to-end mode, and one of the first support, the second support and the third support is fixedly connected with the rotary table 1.

The telescopic mechanism 23 and the fixing frame 222 may be respectively connected to the turntable 1, that is, the fixing frame 222 is fixedly connected to the turntable 1, and a fixed end of the telescopic mechanism 23 is hinged to the turntable 1. The telescopic mechanism 23 may also be connected to the turntable 1 via a fixing bracket 222.

In the embodiment of the present invention, the fixed end of the retractable mechanism 23 is rotatably mounted on the fixing frame 222. Thus, the structure of the counterweight device provided by the embodiment has integrity. When the counterweight device is installed on the rotary table 1, the telescopic mechanism 23 does not need to be installed independently, and only the fixing frame 222 is directly fixed with the rotary table 1, so that the counterweight device is convenient to install.

As shown in fig. 1, the counterweight device provided by the embodiment of the present invention further includes a connecting member 24. One end of the connecting member 24 is connected to the second end of the connecting rod 221, and the other end of the connecting member 24 is connected to the weight tray 21.

Wherein the connector 24 comprises a first connector, which may be a herringbone frame 242 or a connector comprising a plurality of steel cords. When the first connecting member is the herringbone 242, the upper end of the herringbone 242 is connected to the second end of the connecting rod 221, and the lower end of the herringbone 242 is fixedly connected to the counterweight tray 21. For example, as shown in fig. 2 and 3, the second end of the link 221, the upper end of the propeller strut 242, and the telescopic end of the telescopic mechanism 23 are hinged by the same hinge point.

Further, the connection member 24 further includes a second connection member, and the herringbone 242 is connected to the connection rod 221 through the second connection member. The second link may be a rope or a hard link plate 241. When the second connecting member is a rope, both ends of the rope may be connected to the upper end of the propeller strut 242 and the second end of the connecting rod 221 through hooks, respectively. When the second connecting member is the connecting pulling plate 241, as shown in fig. 1, the first end of the connecting pulling plate 241 is rotatably connected with the second end of the connecting rod 221, and the second end of the connecting pulling plate 241 is rotatably connected with the propeller strut 242.

The utility model also provides a hoist, this hoist include revolving stage 1 and any kind of counter weight device of the aforesaid, the counter weight device install in revolving stage 1.

Specifically, the crane further comprises a chassis, and the rotary table 1 is rotatably mounted on the chassis. The first end of the connecting rod 221 of the counterweight device is rotatably connected with the turntable 1, the fixed end of the telescopic mechanism 23 is rotatably connected with the turntable 1, and the telescopic end of the telescopic mechanism 23 is rotatably connected with the second end of the connecting rod 221. Further, the crane also comprises a distance sensor and a controller. The distance sensor is mounted on the counterweight device and used for detecting the extending distance of the telescopic end of the telescopic mechanism 23. The distance sensor and the telescopic mechanism 23 are respectively connected with the controller through signals. The controller is used for controlling the telescopic mechanism 23 to perform telescopic motion according to the detection signal of the distance sensor.

Specifically, the controller calculates the distance between the counterweight and the turntable 1 according to the required load condition. The length of the extendable and retractable mechanism 23 to be extended or retracted is calculated from the distance and the geometric relationship of the components in the weighing apparatus, and the length corresponds to the detection target value of the distance sensor. When the distance data fed back by the distance sensor reaches a target value in the process that the telescopic mechanism 23 drives the connecting rod 221 to rotate, the controller controls the telescopic mechanism 23 to stop driving, and therefore accurate control of the horizontal displacement of the counterweight is achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A counterweight device is arranged on a rotary table of a crane and is characterized by comprising a counterweight tray, a connecting frame and a telescopic mechanism, wherein the connecting frame comprises a connecting rod;

2. The counterweight device of claim 1 wherein said connecting frame further comprises a fixed frame, said fixed frame is fixedly mounted to said turntable, and said first end of said connecting rod is rotatably connected to said fixed frame.

3. The counterweight device of claim 2 wherein said fixed frame includes a first support and a second support, said first support, said second support and said turntable being connected to form a triangular support structure.

4. The counterweight device of claim 3 wherein said fixed end of said telescoping mechanism is rotatably mounted to said fixed frame.

5. The counterweight device of claim 1 further comprising a connector, one end of said connector being connected to said second end of said link, the other end of said connector being connected to said counterweight tray.

6. The counterweight device of claim 5 wherein said connecting member includes a chevron having an upper end connected to said second end of said connecting rod and a lower end fixedly connected to said counterweight tray.

7. The counterweight device of claim 6 wherein said connecting member further comprises a connecting tie plate, a first end of said connecting tie plate being rotatably connected to a second end of said connecting rod, a second end of said connecting tie plate being rotatably connected to an upper end of said propeller strut.

8. The counterweight device according to claim 1 wherein said connecting rods are plural in number, and are arranged in a horizontal direction at a rear portion of said turn table;

9. A crane comprising a turntable and a counterweight according to any one of claims 1 to 8, said counterweight being mounted to said turntable.

10. The crane according to claim 9, further comprising a distance sensor and a controller, wherein the distance sensor is mounted on the counterweight device and used for detecting the extending distance of the telescopic end of the telescopic mechanism, and the distance sensor and the telescopic mechanism are respectively in signal connection with the controller.