CN115818471A

CN115818471A - Counter weight mounting structure and engineering machinery

Info

Publication number: CN115818471A
Application number: CN202211478184.3A
Authority: CN
Inventors: 范斌; 杨春; 黎波
Original assignee: Hunan Sany Medium Lifting Machinery Co Ltd
Current assignee: Hunan Sany Medium Lifting Machinery Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-21
Also published as: WO2024109681A1

Abstract

The application provides a counterweight mounting structure and engineering machinery, wherein the counterweight mounting structure comprises a mounting main body, and a counterweight is detachably mounted on the mounting main body; wherein, one of the mounting main body and the balance weight is provided with at least two lugs, the other one is provided with matching holes respectively corresponding to the lugs, and the lugs are arranged to be inserted into the corresponding matching holes and protrude out of the matching holes; the counterweight mounting structure further comprises a driving mechanism and a locking mechanism, the locking mechanism comprises at least two movable locking blocks, the locking blocks correspond to the lugs one to one, the driving mechanism comprises an operation portion connected with the locking mechanism, and the operation portion acts to drive the at least two locking blocks to move, so that each locking block is matched with the corresponding lug to lock the lug inserted into the matching hole. According to the technical scheme, the counterweight is convenient and quick to install, the assembly efficiency can be effectively improved, and the risk of manual work in high-altitude operation is greatly reduced.

Description

Counter weight mounting structure and engineering machinery

Technical Field

The application relates to the field of engineering machinery, in particular to a counterweight mounting structure and engineering machinery.

Background

In an engineering machine, some equipment needs to be provided with a counterweight during operation so as to improve the stability of the equipment, for example, a crane, and the counterweight is frequently disassembled and assembled during the operation of the crane, so how to quickly and efficiently install the counterweight becomes a key factor for improving the efficiency of the hoisting operation.

At present, the counterweight is usually installed by adopting bolt connection, so that the installation is very inconvenient and the operation efficiency is influenced.

Disclosure of Invention

In view of this, the present application provides a counterweight mounting structure and an engineering machine, which are used to solve the problem that the installation of a counterweight on the existing engineering machine is inconvenient and the operation efficiency is affected.

According to an aspect of the present application, there is provided a counterweight mounting structure including a mounting body on which a counterweight is provided to be detachably mounted;

at least two lugs are arranged on one of the mounting main body and the balance weight, matching holes corresponding to the lugs are arranged on the other one of the mounting main body and the balance weight, and the lugs can be inserted into the corresponding matching holes and protrude out of the matching holes;

the counterweight mounting structure further comprises a driving mechanism and a locking mechanism, wherein the locking mechanism comprises at least two movable locking blocks, the locking blocks correspond to the convex blocks in a one-to-one mode, the driving mechanism comprises an operating part connected with the locking mechanism, and the operating part can drive the at least two locking blocks to move in an action mode, so that each locking block is matched with the corresponding convex block and is inserted into the convex block locking of the matching hole.

In a possible embodiment, the locking mechanism comprises a moving member, and the at least two locking blocks comprise a first locking block and a second locking block arranged on the moving member;

when the operation part is operated, the moving component is driven to move, so that the first locking block locks the corresponding first lug and the second locking block locks the corresponding second lug.

In a possible embodiment, the first and second projections respectively comprise a projection main body and a transverse portion, the transverse portion projecting from both sides of the projection main body in a first direction of extension to form a projection;

openings are respectively formed in the first locking block and the second locking block, the openings comprise a first opening and a second opening which are communicated, and the length of the first opening in the first extending direction is set to be that two ends of the first opening respectively exceed the second opening;

wherein the length of the first opening in the first direction of extension is greater than the length of the transverse portion so that the transverse portion can enter or exit the first opening, and the length of the second opening in the first direction of extension is greater than the length of the tab body and less than the length of the transverse portion; when the operation portion drives the moving member to move, the bump main body can be made to enter the second opening from the first opening, so that edge portions at both ends of the second opening are respectively supported below the protruding portions at the bump main body side.

In one possible embodiment, the at least two locking blocks further comprise a third locking block, and the at least two projections further comprise a third projection having a pin hole;

and when the operation part acts, the third locking block can be driven to be inserted into the pin hole of the third convex block, so that the third convex block is locked through the third locking block.

In a possible embodiment, the operating portion is configured to be rotatably connected to the mounting body through a rotating shaft, the operating portion can drive the first locking portion and the second locking portion to move to the convex portion corresponding to each locking when rotating to the locking position in a first direction, and the operating portion can drive the first locking portion and the second locking portion to move to the convex portion corresponding to each unlocking when rotating to the unlocking position in a second direction opposite to the first direction.

In a possible embodiment, a first guide groove is arranged on the operating part, and the first guide groove is an elongated groove extending away from the rotating shaft;

the driving mechanism further comprises a guide bracket fixed relative to the mounting main body, a second guide groove is formed in the guide bracket, and the second guide groove is an arc-shaped groove extending around the rotating shaft;

the moving component is provided with a sliding rod which is inserted into the first guide groove and the second guide groove, and the sliding rod is driven to move along the first guide groove and the second guide groove when the operating part rotates.

the third locking block is arranged on a movable moving frame, the driving mechanism further comprises a rope, one end of the rope is connected to the moving frame, the other end of the rope is connected to the operating portion, and the rope is pulled when the operating portion rotates towards the first direction so as to pull the moving frame, so that the third locking block is inserted into the pin hole of the third convex block to lock the third convex block.

In a possible embodiment, a return spring is arranged on the movable frame, and when the rope pulls the movable frame to move and lock the third lug, the return spring is in an accumulated state; when the operating portion rotates in a second direction to release the rope, the moving frame moves in a reverse direction under the action of the return spring so that the third locking block is disengaged from the pin hole.

In a possible embodiment, a fixed bracket is arranged on the mounting body, the moving frame comprises a guide rod movably threaded on the fixed bracket, and the return spring is sleeved on the guide rod and is connected with the mounting body at one end and connected with the guide rod at the other end.

In a possible embodiment, the counterweight mounting structure further includes a guide sleeve, one end of the guide sleeve is connected to the mounting body, and the rope is connected to the moving frame and passes through the guide sleeve to be connected to the operating portion.

In one possible embodiment, the counterweight mounting structure further includes a holding mechanism provided to be able to hold the operating portion in the locked position when the operating portion is rotated to the locked position.

In one possible embodiment, the counterweight mounting structure further comprises a retaining mechanism comprising a safety latch;

the operating part is provided with a first pin hole, the guide bracket is provided with a second pin hole, and when the operating part moves to the locking position, the safety bolt is inserted into the first pin hole and the second pin hole to lock the operating part on the guide bracket.

According to another aspect of the present application, there is also provided a construction machine including a machine body and the counterweight mounting structure as described above provided on the machine body.

In a possible embodiment, the machine body further includes a lifting mechanism configured to lift a counterweight, and when the lifting mechanism lifts the counterweight to fit the counterweight to the mounting body, the protrusion is inserted into the corresponding fitting hole.

According to the technical scheme, the counterweight is convenient and quick to install, the assembly efficiency can be effectively improved, and the risk of manual work in high-altitude operation is greatly reduced.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 is a schematic structural view of a counterweight mounting structure according to an embodiment of the present application;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic structural view of the movable frame;

fig. 5 is a schematic structural view of the counterweight mounting structure shown in fig. 1, viewed from the other side;

FIG. 6 is an enlarged view at C of FIG. 5;

FIG. 7 is a schematic structural view of a mounting body according to an embodiment of the present application;

FIG. 8 is a schematic view of a counterweight according to an embodiment of the present application;

FIG. 9 is a schematic structural view of a moving member according to an embodiment of the present application;

FIG. 10 is a schematic view of an exemplary mounting arrangement of an operating member and a guide bracket according to an embodiment of the application;

fig. 11 is a schematic structural view of the operating member in fig. 10.

Description of the reference numerals:

1-mounting a main body; 11-a first mating hole; 12-a second mating hole; 13-a third mating hole; 14-a fixed support; 15-fixing the plate; 2-counterweight; 21-a first bump; 22-a second bump; 23-a third bump; 3-an operation section; 31-shaft hole; 32-a first guide groove; 33-a first pin hole; 4-a moving member; 41-a first locking block; 42-a second lock block; 43-a linker; 44-a slide bar; 411-first opening; 412-a second opening; 5-a rope; 51-a guide sleeve; 6, moving the frame; 61-a third locking block; 62-a guide rod; 63-an adapter plate; 64-connecting block; 7-a return spring; 8-a guide bracket; 81-a second guide groove; 82-a second pin hole; 9-a safety bolt; 10-lifting oil cylinder.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. In the present application, the embodiments and the features of the embodiments may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

The present application provides a counterweight mounting structure, as shown in fig. 1, which includes a mounting main body 1, a counterweight 2 configured to be detachably mounted on the mounting main body 1; wherein, one of the mounting main body 1 and the balance weight 2 is provided with at least two convex blocks, the other one is provided with matching holes respectively corresponding to the convex blocks, and the convex blocks are arranged to be inserted into the corresponding matching holes and protrude out of the matching holes;

the counterweight mounting structure further comprises a driving mechanism and a locking mechanism, wherein the locking mechanism comprises at least two movable locking blocks, the locking blocks correspond to the lugs one by one, the driving mechanism comprises an operation part 3 connected with the locking mechanism, and the operation part 3 acts to drive the at least two locking blocks to move, so that each locking block is matched with the corresponding lug to lock the lug inserted into the matching hole.

When the balance weight is installed, the convex block on the balance weight 2 is matched and plugged with the matching hole on the installation main body 1 (or the matching hole on the balance weight 2 is matched and plugged with the convex block on the installation main body), and the balance weight 2 can be moved through the lifting oil cylinders 10 (shown in figure 1) respectively arranged on two opposite sides of the installation main body 1, so that the balance weight 2 and the installation main body 1 are attached together to realize the plugging of the convex block and the matching hole. In order to allow the protrusion to be easily inserted into the fitting hole, an edge of the fitting hole facing one end of the protrusion may be formed in a circular arc shape, for example, so that the protrusion can be guided into the fitting hole.

Then, the operation part 3 is driven to act, and then the operation part 3 drives each locking block to move, so that each locking block moves to be matched with the corresponding convex block to lock the convex block, and the convex block cannot be separated from the matching hole, thereby realizing the installation of the balance weight 2 on the installation main body 1.

Compared with the mode of installing the counter weight in the prior art (usually adopting the bolt to connect the counter weight), the technical scheme provided by the application has the advantages that the counter weight is convenient and quick to install, the assembly efficiency can be effectively improved, and the risk of manual work at high altitude is greatly reduced.

In one embodiment, as shown in fig. 7 and 8, a first fitting hole 11, a second fitting hole 12, and a third fitting hole 13 are provided in the mounting body 1, and a first projection 21, a second projection 22, and a third projection 23 are provided in the counterweight 2. When the balance weight 2 approaches the mounting body 1, the first projection 21 is inserted into the first fitting hole 11, the second projection 22 is inserted into the second fitting hole 12, and the third projection 23 is inserted into the third fitting hole 13, with the tip ends of the respective projections protruding from the other ends of the respective fitting holes. The locking mechanism comprises three movable locking blocks for respectively locking the three convex blocks inserted into the matching holes.

Three lugs are arranged to be locked in the corresponding matching holes to realize the installation of the balance weight, and in other embodiments, two lugs or more lugs can be arranged to be locked in the corresponding matching holes to be installed under the condition of reasonable arrangement.

In this embodiment, the installation body 1 is a hoisting box of a crane, and each mating hole is formed in the bottom plate of the hoisting box for abutting against the counterweight 2. In other construction machines, the mounting body may have other structures.

In one embodiment, the locking mechanism comprises a moving member 4, and at least two of the locking blocks comprise a first locking block 41 and a second locking block 42 arranged on the moving member 4; wherein the first locking block 41 is used for locking the part of the first projection 21 extending out of the mating hole after the first projection 21 is inserted into the first mating hole 11, and the second locking block 42 is used for locking the part of the second projection 22 extending out of the mating hole after the second projection 22 is inserted into the second mating hole 12.

When the operation unit 3 is operated, the moving member 4 is moved, and the first lock block 41 and the second lock block 42 lock the corresponding first projection 21 and the second projection 22.

Specifically, fig. 9 shows the moving member 4 in an embodiment, and the moving member 4 includes a first locking block 41, a second locking block 42, and a connecting portion 43 connecting the first locking block 41 and the second locking block 42, where the connecting portion 43 may be a connecting rod, or may be another connecting structure.

Fig. 1 shows a state where the first projection 21 is locked by the first locking piece 41 at one side of the mounting body 1 (enlarged view in fig. 2), and fig. 5 shows a state where the second projection 22 is locked by the second locking piece 42 at the other side of the mounting body 1 (enlarged view in fig. 6).

As shown in fig. 2 and 6, the first bump 21 and the second bump 22 respectively include a bump main body 211 and a lateral portion 212, the lateral portion 212 protrudes from both sides of the bump main body 211 in a first extending direction (a direction indicated by an arrow on the lateral portion 212 in fig. 2) to form a protruding portion, and the bump main body 211 and the lateral portion 212 are formed in a substantially T-shaped structure.

As shown in fig. 9 (in conjunction with fig. 2 and 6), the first locking block 41 and the second locking block 42 are respectively provided with openings, the openings include a first opening 411 and a second opening 412 which are communicated with each other, the length of the first opening 411 in the first extending direction is set to be larger than that of the second opening 412 at two ends respectively, namely, the first opening 411 and the second opening 412 form a T-shaped opening;

wherein, the length of the first opening 411 in the first extending direction is greater than the length of the transverse portion 212 so as to enable the transverse portion 212 to enter or exit the first opening 411, and the length of the second opening 412 in the first extending direction is greater than the length of the bump main body 211 and less than the length of the transverse portion 212; when the operation portion 3 moves the moving member 4, the bump main body 211 can be made to enter the second opening 412 from the first opening 411, so that edge portions at both ends of the second opening 412 are supported below the protruding portions at both sides of the bump main body 211, respectively.

More specifically, in the unlocked state, the protrusion main bodies 211 of the first protrusion 21 and the second protrusion 22 are located in the first opening 411, and after the operation portion 3 drives the moving member 4 to move, the first locking block 41 and the second locking block 42 move together, and the protrusion main bodies 211 enter the second opening 412 from the first opening 411, so that the edges at the two ends of the second opening 412 support the protruding portions at the two sides of the protrusion main body 211, as shown in fig. 2 and 6, which can prevent the first protrusion 21 and the second protrusion 22 from coming out of the corresponding mating holes. When the operation portion 3 drives the first locking block 41 and the second locking block 42 to move to the unlocked state, the protrusion main bodies 211 of the first protrusion 21 and the second protrusion 22 respectively move into the first opening 411, so that the first opening 411 can be disengaged, and unlocking is achieved.

It can be understood by those skilled in the art that the matching manner of the first locking block 41 and the second locking block 42 with the second protrusion 21 and the second protrusion 22 is not limited to the above, and for example, a positioning portion may be provided on the first locking block 41 (or the second locking block 42) to match with a positioning groove provided on the first protrusion 21 (the second protrusion 22) to realize locking, or a positioning groove may be provided on the first locking block 41 (or the second locking block 42) to match with a positioning portion provided on the first protrusion 21 (the second protrusion 22) to realize locking.

In one embodiment, the at least two locking blocks may further include a third locking block 61, as shown in fig. 3, the at least two protrusions further include a third protrusion 23 having a pin hole, and the third locking block 61 is configured as a locking pin capable of being inserted into the pin hole of the third protrusion 23. When the operation part 3 operates, the third locking block 61 can be driven to be inserted into the pin hole of the third projection 23, so that the third projection 23 is locked by the third locking block 61. When the operation part 3 acts, the third locking block 61 can be pulled by the pull rope to enter the corresponding pin hole, or the third locking block 61 is driven by other linkage structures to move to enter the corresponding pin hole.

That is, the counterweight may be locked by the first locking block 41, the second locking block 42, and the third locking block 61 to the first projection 21, the second projection 22, and the third projection 23, respectively, i.e., three points of the counterweight may be attached to the mounting body 1. The three-point connection mode is stable, and the inclination condition is not easy to occur.

In one embodiment, as shown in fig. 1 and 2, the operation portion 3 is rotatably connected to the mounting body 1 through a rotating shaft 34, and as shown in fig. 10 and 11, the operation portion 3 is provided with a shaft hole 31 for the rotating shaft 34 to pass through. When the operation portion 3 is driven to rotate towards the first direction, the first locking portion 41 and the second locking portion 42 can be driven to move to lock the convex portions corresponding to the first locking portion and the second locking portion 42 can be driven to reversely move to unlock the convex portions corresponding to the second locking portion when the operation portion 3 rotates towards the second direction.

The operation portion 3 may be a pull rod structure for facilitating hand-held operation, or may be another structure for facilitating operation, which is not limited herein.

Further, as shown in fig. 10 and 11, the operation portion 3 is provided with a first guide groove 32, and the first guide groove 32 is an elongated groove (the elongated groove may be a linear groove or a groove having a curvature) extending away from the rotation shaft 34; the driving mechanism further comprises a guide bracket 8 fixed relative to the mounting body 1, wherein a second guide groove 81 is formed in the guide bracket 8, and the second guide groove 81 is an arc-shaped groove extending around the rotating shaft 34.

Referring to fig. 2, the moving member 4 is provided with a sliding rod 44, in this embodiment, the sliding rod 44 may be specifically disposed at a position close to the first locking portion 41, the sliding rod 44 is inserted into the first guide slot 32 and the second guide slot 81, and when the driving operation portion 3 rotates, the sliding rod 44 is driven to move along the first guide slot 32 and the second guide slot 81, so that the sliding rod 44 drives the moving member 4 as a whole to move, the first locking portion 41 and the second locking portion 43 respectively move to cooperate with respective protrusions to achieve locking, fig. 2 shows a state where the first locking portion 41 locks the first protrusion 21, and fig. 6 shows a state where the second locking portion 43 locks the second protrusion 22.

Optionally, in this embodiment, the at least two locking blocks further include a third locking block 61, and the at least two protrusions further include a third protrusion 23 having a pin hole;

as shown in fig. 3 and 4, the driving mechanism further includes a rope 5, one end of the rope 5 is connected to the moving frame 6, the other end of the rope 5 is connected to the operating portion 3, and when the operating portion 3 rotates in the first direction, the moving member 4 is pulled to move and the rope 5 is pulled at the same time, so that the rope 5 pulls the moving frame 6, and the third locking block 61 is inserted into the pin hole of the third protrusion 23 to lock the third protrusion 23.

Optionally, a return spring 7 is arranged on the moving frame 6, and when the rope 5 pulls the moving frame 6 to move and lock the third lug 23, the return spring 7 is in an accumulated state; when the operating portion 3 rotates the release rope 5 in the second direction, the moving frame 6 moves in the reverse direction by the return spring 7 so that the third locking piece 61 can be disengaged from the pin hole.

Alternatively, as shown in fig. 3, the fixing bracket 14 is disposed on the mounting body 1, the moving frame 6 includes a guide rod 62 movably penetrating the fixing bracket 14, and the return spring 7 is sleeved on the guide rod 62 and has one end connected to the mounting body 1 and the other end connected to the guide rod 62.

Specifically, the mounting body 1 includes a fixing plate 15, the fixing bracket 14 is fixed on the fixing plate 15, the fixing bracket 14 is substantially U-shaped, and two side arms of the U-shaped are fixed on the fixing plate 15. The movable frame 6 includes an adapter plate 63 located inside the fixed plate 15, and the guide rod 62 and the third locking block 61 are fixedly connected to the adapter plate 63 so as to be integrally movable by pulling the rope 5. The guiding rod 62 extends from the adapter plate 63 through the fixing plate 15 to the outside and movably penetrates the fixing bracket 14, and the third locking block 61 extends from the adapter plate 63 through the fixing plate 15 to the outside and corresponds to the locking hole of the third bump 23. The return spring 7 is arranged outside the fixed plate 15 and sleeved on the guide rod 62, and one end of the return spring close to the adapter plate 63 is connected to the fixed plate 15, and the other end of the return spring is connected to the guide rod 62. When the rope 5 pulls the moving frame 6 such that the third locking piece 61 is inserted into the locking hole, the return spring 7 is elongated and charged, and when the rope 5 is released, the return spring 7 is retracted and pushes the moving frame 6 to move reversely. Wherein, a connecting block 64 protruding in the radial direction is provided on the guiding rod 62, one end of the return spring 7 can be connected to the connecting block 64 and connected to the guiding rod 62, and the rope 5 can be connected to the connecting block 64, and of course, can be connected to other positions of the moving frame 6 as long as the moving frame 6 can be pulled to move.

In another embodiment, a return spring 7 may be provided inside the fixed plate 15, the return spring 7 being compressed to be charged when the rope 5 pulls the moving frame 6 such that the third locking block 61 is inserted into the locking hole, and the return spring 7 being extended and pushing the moving frame 6 to move reversely when the rope 5 is released.

Optionally, the counterweight mounting structure further includes a guiding sleeve 51, one end of the guiding sleeve 51 is connected to the mounting body 1, and particularly can be connected to the fixing bracket 14 on the mounting body 1, and the rope 5 is connected to the moving frame 6 and passes through the guiding sleeve 51 to be connected to the operating part 3. The guide sleeve 51 can guide the rope 5 so that the rope 5 can bypass structures avoiding direct contact wear.

In addition, the counterweight mounting structure further includes a holding mechanism configured to hold the operation portion 3 at the locked position when the operation portion 3 is rotated to the locked position, so as to avoid the situation where the counterweight is dropped due to the operation portion 3 being rotated to the unlocked position by mistake.

Alternatively, referring to fig. 10 and 11, the holding mechanism includes the safety latch 9, the operating part 3 is provided with a first pin hole 33, the guide bracket 8 is provided with a second pin hole 82, and when the operating part 3 moves to the locking position, the safety latch 9 is inserted into the first pin hole 33 and the second pin hole 82 to lock the operating part 3 to the guide bracket 8. When the unlocking is needed, the safety bolt 9 is pulled out, so that the operation part 3 can rotate to the unlocking position to realize the unlocking of the counterweight.

It is to be understood that the holding mechanism for holding the operation unit 3 at the lock position is not limited to the above-described configuration, and may be another configuration, for example, the holding mechanism may be a mechanism capable of locking the operation unit 3.

It should be noted that, while the counterweight is connected to the mounting body 1 by three-point connection, the counterweight may also be connected by two-point connection, for example, the first projection 21 and the second projection 22 may be respectively locked by only the first locking block 41 and the second locking block 42 (specifically, the size and the position of the projections may be adjusted to ensure the balance of the counterweight), or the operation portion 3 may be provided to drive only the first locking block 41 to lock the first projection 21, and the third locking block 61 to lock the third projection 23 (under the condition that the positions of the first projection 21 and the third projection 23 are reasonably arranged). In addition, the counterweight 2 can be connected by more points, for example, in addition to the above-mentioned three locking blocks to lock the respective lugs, another rope can be provided to pull another third locking block to lock the fourth lug.

In addition, the manner of driving each locking block to move is not limited to the manner of driving each locking block to lock each convex portion by rotating the operation portion 3, and the driving operation portion 3 may also be a linear movement, so that the operation portion drives each locking block to move to lock each convex portion.

According to another aspect of the application, a construction machine is also provided, which comprises a machine body and the counterweight mounting structure arranged on the machine body.

In one embodiment, the machine body further includes a lifting mechanism, which may be an oil cylinder, the lifting mechanism is configured to lift the counterweight 2 in the counterweight mounting structure, when the lifting mechanism lifts the counterweight 2 to fit the counterweight to the mounting body, each protrusion is inserted into the corresponding matching hole, and then the operation portion 3 acts to lock the counterweight 2 to the mounting body 1.

In one embodiment, the construction machine is a crane and the mounting body 1 is a hoisting box of the crane. The counterweight 2 is detachably mounted on the hoisting box. The engineering machine can also be other equipment needing to be provided with the counterweight.

A detailed procedure of mounting and dismounting a counterweight on and from the mounting body 1 of the construction machine in one embodiment will be described below.

Installing a counterweight:

referring to fig. 1 to 6, the lift cylinder 10 raises the balance weight 2 such that the upper surface of the balance weight 2 is fitted to the bottom surface of the mounting body 1, and the first projection 21, the second projection 22, and the third projection 23 of the balance weight 2 are inserted into the first fitting hole 11, the second fitting hole 12, and the third fitting hole 13 of the mounting body 1, respectively.

The operation part 3 is pulled, the operation part 3 rotates towards the first direction, when the operation part 3 rotates to the locking position, the first locking part 41 and the second locking part 42 respectively lock the first lug 21 and the second lug 22, meanwhile, the operation part 3 pulls the rope 5, the rope 5 pulls the moving frame 6, the third locking block 61 on the moving frame 6 is inserted into the pin hole formed in the third lug 23, and therefore the installation of the counterweight 2 on the installation body 1 is achieved.

Then, the safety plug 9 is inserted into the first pin hole 33 provided in the operation portion 3 and the second pin hole 82 provided in the guide bracket 8, and the operation portion 3 is locked to the guide bracket 8, thereby preventing the counterweight 2 from dropping due to the reverse movement of the operation portion 3.

And (3) disassembling the balance weight:

the lift cylinder 10 lifts the counterweight 2 slightly upwards so that the components are released from the compacted state and the safety latch 9 is pulled out.

Pushing the operation part 3 to rotate towards the second direction, and driving the first locking part 41 and the second locking part 42 to move in opposite directions, so that the first locking part 41 is unlocked from the first bump 21, and the second locking part 42 is unlocked from the second bump 22; meanwhile, the movable frame 6 moves reversely under the action of the return spring 7, so that the third locking block 61 is unlocked from the third bump 23;

after completion of the unlocking, the counterweight 2 can be detached from the mounting body 1.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A counterweight mounting structure, characterized in that it comprises a mounting main body (1), a counterweight (2) being arranged to be detachably mounted on said mounting main body (1);

wherein, one of the mounting main body (1) and the balance weight (2) is provided with at least two convex blocks, the other one is provided with matching holes respectively corresponding to the convex blocks, and the convex blocks are arranged to be inserted into the corresponding matching holes and protrude out of the matching holes;

the counterweight mounting structure further comprises a driving mechanism and a locking mechanism, wherein the locking mechanism comprises at least two movable locking blocks, the locking blocks correspond to the convex blocks in a one-to-one mode, the driving mechanism comprises an operating part (3) connected with the locking mechanism, and the operating part (3) acts to drive the at least two locking blocks to move, so that each locking block is matched with the corresponding convex block and is inserted into the convex block locking hole.

2. The counterweight mounting structure according to claim 1, wherein the lock mechanism includes a moving member (4), and the at least two lock blocks include a first lock block (41) and a second lock block (42) provided on the moving member (4);

when the operation part (3) acts, the moving component (4) is driven to move, so that the first locking block (41) locks the corresponding first lug (21) and the second locking block (42) locks the corresponding second lug (22).

3. The counterweight mounting structure according to claim 2, wherein the first lug (21) and the second lug (22) respectively include a lug main body (211) and a lateral portion (212), the lateral portion (212) projecting from both sides of the lug main body (211) in a first extending direction to form a projecting portion;

openings are respectively formed in the first locking block (41) and the second locking block (42), the openings comprise a first opening (411) and a second opening (412) which are communicated, and the length of the first opening (411) in the first extending direction is set to be larger than the second opening (412) at two ends respectively;

wherein the length of the first opening (411) in the first extension direction is greater than the length of the transverse portion (212) so that the transverse portion (212) can enter or exit the first opening (411), and the length of the second opening (412) in the first extension direction is greater than the length of the tab body (211) and less than the length of the transverse portion (212); when the operation part (3) drives the moving component (4) to move, the bump main body (211) can enter the second opening (412) from the first opening (411), and therefore edge parts of two ends of the second opening (412) are respectively supported below extending parts of two sides of the bump main body (211).

4. The counterweight mounting structure according to claim 2, wherein the at least two locking blocks further include a third locking block (61), the at least two projections further include a third projection (23) having a pin hole;

when the operation part (3) acts, the third locking block (61) can be driven to be inserted into the pin hole of the third convex block (23), so that the third convex block (23) is locked through the third locking block (61).

5. The counterweight mounting structure according to claim 2, wherein the operating portion (3) is rotatably connected to the mounting body (1) via a rotating shaft (34), the operating portion (3) is configured to move the first locking portion (41) and the second locking portion (42) to lock the respective corresponding convex portions when rotated in a first direction to a locking position, and the operating portion (3) is configured to move the first locking portion (41) and the second locking portion (42) to unlock the respective corresponding convex portions when rotated in a second direction opposite to the first direction to an unlocking position.

6. The counterweight mounting structure according to claim 5, wherein a first guide groove (32) is provided on the operating portion (3), the first guide groove (32) being an elongated groove extending along a direction away from the rotating shaft (34);

the driving mechanism further comprises a guide bracket (8) fixed relative to the mounting main body (1), a second guide groove (81) is formed in the guide bracket (8), and the second guide groove (81) is an arc-shaped groove extending around the rotating shaft (34);

the moving component (4) is provided with a sliding rod (44), the sliding rod (44) is inserted into the first guide groove (32) and the second guide groove (81), and the sliding rod (44) is driven to move along the first guide groove (32) and the second guide groove (81) when the operating part (3) rotates.

7. The counterweight mounting structure according to claim 5, wherein the at least two locking blocks further include a third locking block (61), the at least two projections further include a third projection (23) having a pin hole;

the third locking block (61) is arranged on a movable moving frame (6), the driving mechanism further comprises a rope (5), one end of the rope (5) is connected to the moving frame (6), the other end of the rope is connected to the operating portion (3), and when the operating portion (3) rotates towards the first direction, the rope (5) is pulled, so that the moving frame (6) is pulled, and the third locking block (61) is inserted into the pin hole of the third convex block (23) to lock the third convex block (23).

8. The counterweight mounting structure according to claim 7, characterized in that a return spring (7) is provided on the movable frame (6), and when the rope (5) pulls the movable frame (6) to move and lock the third lug (23), the return spring (7) is in an accumulated state; when the operating part (3) rotates towards a second direction to release the rope (5), the moving frame (6) moves reversely under the action of the return spring (7) so that the third locking block (61) is separated from the pin hole.

9. The counterweight mounting structure according to claim 8, wherein a fixed bracket (14) is provided on the mounting body, the moving frame (6) includes a guide rod (62) movably threaded on the fixed bracket (14), and the return spring (7) is fitted over the guide rod (62) and has one end connected to the mounting body (1) and the other end connected to the guide rod (62).

10. The counterweight mounting structure according to claim 7, further comprising a guide sleeve (51), wherein one end of the guide sleeve (51) is connected to the mounting body (1), and wherein the rope (5) is connected to the moving frame (6) and connected to the operating portion (3) after passing through the guide sleeve (51).

11. The counterweight mounting structure according to any one of claims 5 to 10, further comprising a holding mechanism provided so as to be able to hold the operating portion (3) in the locked position when the operating portion (3) is rotated to the locked position.

12. The counterweight mounting structure of claim 6 further comprising a retaining mechanism including a safety latch (9);

the operating part (3) is provided with a first pin hole (33), the guide bracket (8) is provided with a second pin hole (82), and when the operating part (3) moves to the locking position, the safety bolt (9) is inserted into the first pin hole (33) and the second pin hole (82) to lock the operating part (3) on the guide bracket (8).

13. A working machine characterized by comprising a machine body and the counterweight mounting structure according to any one of claims 1-12 provided on the machine body.

14. The working machine according to claim 13, wherein the machine body further comprises a lifting mechanism configured to lift a counterweight (2), wherein the protrusion is inserted into the corresponding engagement hole when the lifting mechanism lifts the counterweight (2) to fit the counterweight to the mounting body.