WO2022156251A1

WO2022156251A1 - Counterweight displacement mechanism and operating machine

Info

Publication number: WO2022156251A1
Application number: PCT/CN2021/119334
Authority: WO
Inventors: 黎波; 侯中祥; 刘会敏
Original assignee: 三一汽车起重机械有限公司
Priority date: 2021-01-25
Filing date: 2021-09-18
Publication date: 2022-07-28
Also published as: CN112758845B; CN112758845A; EP4282808A1

Abstract

A counterweight displacement mechanism and an operating machine (100). The counterweight displacement mechanism comprises a machine frame (1), a rotary table (2), a counterweight mounting frame (3), a counterweight (4) and a jacking device (5), wherein the rotary table (2) has a head portion (21) and a tail portion (22), and the head portion (21) is connected to the machine frame (1); the counterweight mounting frame (3) is rotatably connected to the tail portion (22) along an axis in a vertical direction, the counterweight mounting frame (3) is provided with a connecting portion (31), and the connecting portion (31) is located on one side of a rotating axis of the counterweight mounting frame (3); the counterweight (4) is provided with a mating portion (41) detachably connected to the connecting portion (31); and the jacking device (5) is used for driving the mating portion (41) to move up and down relative to the connecting portion (31).

Description

Counterweight displacement mechanism and working machinery

technical field

The invention relates to the technical field of working machines, in particular to a counterweight displacement mechanism and a working machine.

Background technique

At present, work machines (such as cranes) are mostly fixed counterweights, especially small and medium tonnage work machines. There are also some working machines that use a mobile counterweight structure. Most of the mobile counterweight structures are equipped with a telescopic counterweight mounting frame with a drive device. The counterweight is installed on the telescopic counterweight mounting frame. To achieve the rearward shift of the center of gravity of the vehicle to increase the stability of the vehicle. However, the existing mobile counterweight structure has the problems of complex structure and large vertical space occupation. For large-tonnage operation machinery, especially super-large tonnage operation machinery, it may not be able to meet the longitudinal space requirements during telescopic translation.

SUMMARY OF THE INVENTION

The present invention provides a counterweight displacement mechanism and a working machine, which are used to solve the problems in the prior art that the movable counterweight structure has a complex structure and needs to occupy a large longitudinal space.

The present invention provides a counterweight displacement mechanism, comprising:

frame;

a turntable, having a head part and a tail part, the head part is connected to the frame, and the head part and the tail part are oppositely arranged in the length direction of the turntable;

The counterweight mounting frame is rotatably connected to the tail portion along the axis in the up-down direction, the counterweight mounting frame is provided with a connecting portion, and the connecting portion is located on one side of the rotation axis of the counterweight mounting frame;

a counterweight, provided with a matching portion detachably connected to the connecting portion; and,

The jacking device is used for driving the matching portion to move up and down relative to the connecting portion.

Optionally, there are two counterweight mounting racks, and the two counterweight mounting racks are located on both sides of the tail portion in the width direction of the turntable;

There are two matching portions corresponding to the two counterweight mounting brackets, and the two matching portions are respectively detachably connected to the two connecting portions.

Optionally, the connecting portion and the matching portion are detachably connected through a connecting pin;

The connecting portion is provided with a first pin hole through which the connection pin passes, and the matching portion is provided with a second pin hole through which the connection pin passes.

Optionally, the counterweight mounting frame or the matching portion is provided with a pin bracket, the connection pin has an opposite first end and a second end, and the first end of the connection pin is along the The extension direction of the first pin hole is movably connected to the pin shaft bracket;

When the matching portion is located at the first position and the connecting pin is located at the first pin position, the second end of the connecting pin passes through the first pin hole and the second pin a hole, the connecting part is connected with the matching part;

When the connecting pin is located at the second pin position, both the connecting portion and the matching portion are separated from the connecting pin, and the connecting portion and the matching portion are separable.

Optionally, the counterweight mounting bracket is provided with an abutting portion, and the abutting portion is located above the first pin hole;

When the engaging portion is located at the first position, the top end of the engaging portion abuts the abutting portion, and the first pin hole and the second pin hole are in the extending direction of the first pin hole relative;

When the engaging portion is located at the second position, the engaging portion is located below the abutting portion.

Optionally, the abutting portion is a positioning pin provided along the extending direction of the first pin hole;

The top end of the matching portion is provided with a V-shaped groove with the notch facing upward, and the V-shaped groove penetrates the matching portion in the extending direction of the second pin hole;

When the matching portion is located at the first position, at least a part of the positioning pin protrudes into the V-shaped groove, and the positioning pin abuts two opposite side walls of the V-shaped groove.

Optionally, the jacking device is disposed on the frame and below the counterweight mounting frame; or,

The jacking device is mounted on the counterweight and is dynamically coupled and connected with the matching portion.

Optionally, a locking structure is provided between the counterweight mounting frame and the tail portion to limit the rotation of the counterweight mounting frame when the counterweight mounting frame is rotated and adjusted to a preset installation position. .

Optionally, the locking structure includes:

a connecting plate, connected to the tail and disposed downward, the connecting plate is provided with a first limiting hole and a second limiting hole through; and,

A locking bolt is arranged along the rotation axis of the counterweight mounting frame, the locking bolt has a locking end facing the connecting plate and a connecting end facing away from the connecting plate, and the locking bolt has a locking end facing the connecting plate and a connecting end facing away from the connecting plate. The connecting end is connected with the counterweight mounting frame through an elastic piece;

When the counterweight mounting bracket is in the first installation position, the connecting portion is close to the head portion relative to the rotation axis of the counterweight mounting bracket, and the locking end of the locking bolt is connected to the The first limit hole is clamped;

When the counterweight mounting bracket is located at the second installation position, the connecting portion is away from the head portion relative to the rotation axis of the counterweight mounting bracket, and the locking end of the locking bolt is connected to the second mounting position. The limit hole is snapped.

The present invention also provides a working machine, comprising the counterweight displacement mechanism as described above.

The counterweight displacement mechanism and the working machine provided by the present invention can be realized by disassembling the counterweight and the counterweight mounting frame, rotating and adjusting the counterweight mounting frame, and then lifting the counterweight to the counterweight mounting frame by the jacking device for installation. The movement and adjustment of the counterweight takes up less vertical space, and because the counterweight mounting frame does not need to be provided with a driving device, the counterweight mounting frame is simple in structure, light in weight, and easier to rotate.

Description of drawings

In order to explain the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a work machine provided by the present invention, wherein the counterweight mounting frame is located at a first mounting position;

Fig. 2 is the enlarged schematic diagram of A place in Fig. 1;

Fig. 3 is the partial structure schematic diagram of the working machine in Fig. 1;

Fig. 4 is the enlarged schematic diagram at B in Fig. 3;

Fig. 5 is the partial structure schematic diagram of the structure in Fig. 3;

FIG. 6 is a schematic structural diagram of the work machine in FIG. 1 , wherein the counterweight mounting frame is located at a second mounting position;

Fig. 7 is the partial structure schematic diagram of the working machine in Fig. 6;

Reference number:

1: Rack; 2: Turntable; 21: Head; 22: Tail; 3: Counterweight mounting bracket; 31: Connecting part; 32: First pin hole; 33: Abutting part; 4: Counterweight; 41: Fitting part; 42: second pin hole; 43: V-shaped groove; 5: jacking device; 6: connecting pin; 7: pin bracket; 8: locking structure; 81: connecting plate; 82: first limit hole; 83: second limit hole; 84: locking pin; 100: working machine.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The following describes the counterweight displacement mechanism of the present invention with reference to FIGS. 1 to 7 . The counterweight displacement mechanism can be used for working machines such as cranes, concrete pump trucks or fire trucks. The working machine is a crane as an example for introduction.

Specifically, as shown in FIGS. 1 to 4 , the counterweight displacement mechanism includes a frame 1, a turntable 2, a counterweight mounting frame 3, a counterweight 4 and a jacking device 5. The turntable 2 has a head portion 21 and a tail portion 22. The head portion 21 is connected to the frame 1, the head part 21 and the tail part 22 are oppositely arranged in the length direction of the turntable 2, the counterweight mounting frame 3 is rotated and connected to the tail part 22 along the axis of the up-down direction, and the counterweight mounting frame 3 is provided with a connecting part 31, which is connected The counterweight 4 is provided with a matching portion 41 detachably connected to the connecting portion 31 ; the jacking device 5 is used to drive the matching portion 41 to move up and down relative to the connecting portion 31 .

Specifically, when the adjustment counterweight 4 needs to be moved, the connecting part 31 and the matching part 41 are first disassembled, and the counterweight 4 is lowered through the jacking device 5; The counterweight 4 is moved in translation by the lifting device, etc., so that the matching part 41 and the connecting part 31 are opposite up and down;

In the counterweight displacement mechanism provided by the present invention, the counterweight 4 is disassembled from the counterweight installation frame 3, and after the counterweight installation frame 3 is rotated and adjusted, the counterweight 4 is lifted by the jacking device 5 to the counterweight installation frame 3 for installation. The movement and adjustment of the counterweight 4 can be realized. This kind of movement and adjustment of the counterweight 4 takes up less vertical space, and because the counterweight mounting frame 3 does not need to be provided with a driving device, the counterweight mounting frame 3 has a simple structure and a relatively low weight. Light and easier to turn.

The jacking device 5 can drive the matching portion 41 to move up and down relative to the connecting portion 31 in various ways. It is a telescopic cylinder, the cylinder rod of the telescopic cylinder is connected to the matching part 41, and the cylinder body of the telescopic cylinder is fixedly connected to the main body of the counterweight 4. When the counterweight 4 is located under the counterweight mounting frame 3, the cylinder rod of the telescopic cylinder is first driven to extend. , so that the matching part 41 moves to the connecting part 31 of the counterweight mounting frame 3, and after the matching part 41 is fixedly connected with the connecting part 31, and then drives the cylinder rod of the telescopic cylinder to shrink, the main body of the counterweight 4 can be lifted upwards; 5 and 7, in this embodiment, the jacking device 5 is arranged on the frame 1 and is located below the counterweight mounting frame 3, and the jacking device 5 lifts and lifts the counterweight 4 as a whole. Down, so that the matching part 41 moves up and down relative to the connecting part 31, wherein the jacking device 5 can be an oil cylinder, and the oil cylinder is a rodless cavity for oil intake, and the oil cylinder is conducive to realizing lightweight design and low cost.

As shown in FIG. 4 and FIG. 5 , in this embodiment, there are two counterweight mounting brackets 3 , and the two counterweight mounting brackets 3 are respectively arranged on both sides of the tail portion 22 in the width direction of the turntable 2 ; the matching portion 41 There are two counterweight mounting brackets 3 corresponding to the two, and the two matching parts 41 are respectively detachably connected to the two connecting parts 31 . In this way, the force of the counterweight 4 will be more balanced.

There are many ways to realize the detachable connection between the connecting part 31 and the matching part 41. The connecting part 31 and the matching part 41 can be fixedly connected by screw joints; In the embodiment, the connecting portion 31 and the matching portion 41 are detachably connected through the connecting pin 6; The second pin hole 42 through which the pin shaft 6 passes. The detachable connection between the connecting part 31 and the matching part 41 is realized by the connecting pin 6 , so that the disassembly and assembly of the counterweight 4 is more convenient.

Further, as shown in FIG. 2 , in this embodiment, the counterweight mounting frame 3 or the matching portion 41 is provided with a pin bracket 7 , the connection pin 6 has opposite first and second ends, and the connection pin 6 The first end of the pin is movably connected to the pin bracket 7 along the extension direction of the first pin hole 32; when the matching portion 41 is at the first position and the connecting pin 6 is at the first pin position, the The second end passes through the first pin hole 32 and the second pin hole 42, and the connecting portion 31 is connected to the matching portion 41; when the connecting pin 6 is located at the second pin position, the connecting portion 31 and the matching portion 41 are both connected to the matching portion 41. The connecting pin 6 is separated, and the connecting portion 31 and the matching portion 41 can be separated. As shown in Figure 2, the pin bracket 7 is fixedly installed on the counterweight mounting frame 3, and the connection pin 6 is connected with the pin bracket 7, so that the connection pin 6 is not easily lost.

As shown in FIGS. 4 and 5 , in this embodiment, the counterweight mounting bracket 3 is provided with an abutting portion 33 , and the abutting portion 33 is located above the first pin hole 32 ; in the case where the matching portion 41 is located at the first position down, the top end of the matching portion 41 abuts the abutting portion 33, and the first pin hole 32 and the second pin hole 42 are opposite in the extending direction of the first pin hole 32; when the matching portion 41 is located at the second position, the matching The portion 41 is located below the abutting portion 33 . In the process of lifting the counterweight 4 by the lifting device 5 , the abutting portion 33 can realize the positioning of the counterweight 4 , thereby facilitating the smooth insertion of the connecting pin 6 to fix the counterweight 4 .

Further, as shown in FIGS. 4 and 5 , in this embodiment, the abutting portion 33 is a positioning pin provided along the extending direction of the first pin hole 32 ; The V-shaped groove 43 penetrates the matching portion 41 in the extending direction of the second pin hole 42; when the matching portion 41 is in the first position, at least part of the positioning pin extends into the V-shaped groove 43, and the positioning pin It abuts against the opposite side walls of the V-shaped groove 43 . Through the limited cooperation between the positioning pin and the V-shaped groove 43, the counterweight 4 can be prevented from shaking during the operation.

As shown in FIG. 2 and FIG. 5 , in this embodiment, a locking structure 8 is provided between the counterweight mounting frame 3 and the tail portion 22 , which is used when the counterweight mounting frame 3 is rotated and adjusted to a preset installation position The rotation of the counterweight mounting bracket 3 is restricted. After the counterweight mounting frame 3 is adjusted, the locking structure 8 can prevent the counterweight mounting frame 3 from shaking.

Specifically, as shown in FIG. 2 and FIG. 5 , in this embodiment, the locking structure 8 includes a connecting plate 81 and a locking pin 84 , the connecting plate 81 is connected to the tail portion 22 and is disposed downward, and the connecting plate 81 is provided with The first limit hole 82 and the second limit hole 83; the locking pin 84 is arranged along the rotation axis of the counterweight mounting frame 3, and the locking pin 84 has a locking end facing the connecting plate 81 and a connection facing away from the connecting plate 81 The connecting end of the locking bolt 84 is connected with the counterweight mounting frame 3 through an elastic member; when the counterweight mounting frame 3 is in the first installation position, the connecting portion 31 is close to the head portion relative to the rotation axis of the counterweight mounting frame 3 21. The locking end of the locking bolt 84 is engaged with the first limiting hole 82; when the counterweight mounting frame 3 is in the second installation position, the connecting portion 31 is away from the head relative to the rotation axis of the counterweight mounting frame 3 21. The locking end of the locking bolt 84 is snap-connected with the second limiting hole 83 . As shown in FIG. 1 and FIG. 6 , the longitudinal direction of the rack 1 is taken as the front-rear direction, so that two counterweight installation positions, one in front and one behind, are formed on the rack 1 . Wherein, jacking devices 5 are installed on the rack 1 corresponding to two counterweight installation positions, and a plurality of jacking devices are installed at intervals along the width direction of the rack 1 corresponding to each counterweight installation position on the rack 1 5. For example, as shown in FIG. 7 , two jacking devices 5 are installed at intervals along the width direction of the rack 1 corresponding to each counterweight installation position on the rack 1 .

The present invention also provides a work machine 100, which may be a crane, a concrete pump truck, or a fire truck, etc. As shown in FIGS. 1 to 7 , the work machine 100 includes the above-mentioned counterweight displacement mechanism.

In the work machine 100 provided by the present invention, the counterweight 4 and the counterweight mounting frame 3 are disassembled, and after the counterweight mounting frame 3 is rotated and adjusted, the counterweight 4 is lifted by the jacking device 5 to the counterweight mounting frame 3 for installation. The movement adjustment of the counterweight 4 is realized. This kind of movement adjustment method of the counterweight 4 takes up less longitudinal space, and since the counterweight mounting frame 3 does not need to be provided with a driving device, the counterweight mounting frame 3 has a simple structure and light weight, Turning is easier.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A counterweight displacement mechanism, comprising:

rack(1);

A turntable (2) has a head (21) and a tail (22), the head (21) is connected to the frame (1), and the head (21) and the tail (22) are in the turntable (2) ) are relatively set in the length direction;

The counterweight mounting frame (3) is rotatably connected to the tail portion (22) along the axis in the up-down direction, the counterweight mounting frame (3) is provided with a connecting portion (31), and the connecting portion (31) is located at the one side of the rotation axis of the counterweight mounting frame (3);

a counterweight (4), provided with a matching portion (41) detachably connected to the connecting portion (31); and,

A jacking device (5) is used for driving the matching portion (41) to move up and down relative to the connecting portion (31).
The counterweight displacement mechanism according to claim 1, characterized in that, there are two counterweight mounting brackets (3), and the two counterweight mounting brackets (3) are respectively provided on the tail portion (22) on both sides in the width direction of the turntable (2);

Two of the matching portions (41) are provided corresponding to the two counterweight mounting brackets (3), and the two matching portions (41) are respectively detachably connected to the two connecting portions (31).
The counterweight displacement mechanism according to claim 1, wherein the connecting portion (31) and the matching portion (41) are detachably connected through a connecting pin (6);

The connecting portion (31) is provided with a first pin hole (32) through which the connecting pin (6) passes, and the matching portion (41) is provided with the connecting pin (6) passing through. ) through the second pin hole (42).
The counterweight displacement mechanism according to claim 3, wherein the counterweight mounting bracket (3) or the matching portion (41) is provided with a pin shaft bracket (7), and the connecting pin shaft (6) ) has opposite first and second ends, the first end of the connecting pin (6) is movably connected to the pin bracket (7) along the extending direction of the first pin hole (32) superior;

When the matching portion (41) is located at the first position and the connecting pin (6) is located at the first pin position, the second end of the connecting pin (6) passes through the first a pin hole (32) and the second pin hole (42), the connecting part (31) is connected with the matching part (41);

When the connecting pin (6) is located at the second pin position, both the connecting portion (31) and the matching portion (41) are separated from the connecting pin (6), and the connecting portion (31) is separable from the matching portion (41).
The counterweight displacement mechanism according to claim 3, wherein the counterweight mounting bracket (3) is provided with an abutting portion (33), and the abutting portion (33) is located in the first pin hole (32) above;

When the fitting portion (41) is located at the first position, the top end of the fitting portion (41) abuts the abutting portion (33), and the first pin hole (32) is connected to the second The pin holes (42) are opposite in the extending direction of the first pin holes (32);

When the engaging portion (41) is located at the second position, the engaging portion (41) is located below the abutting portion (33).
The counterweight displacement mechanism according to claim 5, wherein the abutting portion (33) is a positioning pin provided along the extending direction of the first pin hole (32);

The top end of the matching portion (41) is provided with a V-shaped groove (43) with the notch facing upward, and the V-shaped groove (43) penetrates the matching portion in the extending direction of the second pin hole (42). (41);

When the matching portion (41) is located at the first position, at least part of the positioning pin protrudes into the V-shaped groove (43), and the positioning pin abuts against the V-shaped groove (43). ) on the opposite side walls.
The counterweight displacement mechanism according to claim 1, wherein the jacking device (5) is arranged on the frame (1) and is located below the counterweight mounting frame (3); or ,

The jacking device (5) is mounted on the counterweight (4) and is dynamically coupled to the matching portion (41).
The counterweight displacement mechanism according to claim 1, characterized in that, a locking structure (8) is provided between the counterweight mounting bracket (3) and the tail portion (22), for the When the weight mounting bracket (3) is rotated and adjusted to a preset installation position, the rotation of the counterweight mounting bracket (3) is restricted.
The counterweight displacement mechanism according to claim 8, wherein the locking structure (8) comprises:

A connecting plate (81) is connected to the tail portion (22) and is disposed downward, and the connecting plate (81) is provided with a first limiting hole (82) and a second limiting hole (83) therethrough; and,

A locking bolt (84), arranged along the axis of rotation of the counterweight mounting bracket (3), the locking bolt (84) has a locking end facing the connecting plate (81) and facing away from the connecting plate The connecting end of (81), the connecting end of the locking bolt (84) is connected to the counterweight mounting bracket (3) through an elastic member;

When the counterweight mounting bracket (3) is in the first installation position, the connecting portion (31) is close to the head portion (21) with respect to the rotation axis of the counterweight mounting bracket (3), and the The locking end of the locking bolt (84) is engaged with the first limiting hole (82);

When the counterweight mounting bracket (3) is in the second installation position, the connecting portion (31) is away from the head portion (21) relative to the rotation axis of the counterweight mounting bracket (3), and the The locking end of the locking bolt (84) is engaged with the second limiting hole (83).
A work machine (100), characterized by comprising the counterweight displacement mechanism according to any one of claims 1 to 9.