CN216892578U - Rock breaking device and construction machinery - Google Patents

Abstract

The utility model provides a rock breaking device and construction machinery, and belongs to the field of engineering machinery. The rock breaking device comprises a small arm, a first connecting piece, a second connecting piece and a breaking assembly; the crushing assembly is hinged with the small arm; the first connecting piece comprises a second hinge part, a first hinge part and a counterweight structure, and the second hinge part and the first hinge part are connected with the counterweight structure. The first connecting piece is hinged with the crushing assembly through a second hinge part and is hinged with the second connecting piece through a first hinge part; the second connecting piece is also hinged with the small arm. The width of the counterweight structure is greater than the width of the second hinge; or/and the distance from the second hinge part to one end of the counterweight structure far away from the second hinge part is larger than the distance between the first hinge part and the second hinge part. Under the limited circumstances of the horizontal width of broken subassembly and actuating cylinder link, can make the width of counter weight structure increase as far as possible to maximize the weight of counter weight structure. The greater the weight of the counterweight structure, the greater the downforce it produces from the crushing assembly; thereby improving the working efficiency.

Description

Rock breaking device and construction machinery

Technical Field

The utility model relates to the field of engineering machinery, in particular to a rock breaking device and construction machinery.

Background

An excavator carries a crushing assembly (such as a crushing hammer or a scarifier) to crush rocks, and the excavator generally comprises a big arm and a small arm; one end of the big arm is connected with the upper body of the excavator, and the other end of the big arm is connected with the small arm. The crushing assembly is carried on the small arm, one end of the bucket rod oil cylinder is hinged with the large arm, and the other end of the bucket rod oil cylinder is hinged with the small arm. The crushing assembly is hinged with a driving oil cylinder hinged with the small arm through a first connecting piece and a second connecting rod; the driving oil cylinder is stretched to control the rotation angle of the crushing assembly.

In the operation process, the larger the contact pressure between the crushing assembly and the rock is, the more the operation efficiency is improved; the contact pressure of the crushing component and the rock of the existing rock breaking device is still to be improved, so that the operation efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rock breaking device which can effectively improve the contact pressure between a breaking hammer and rocks so as to improve the working efficiency.

Another object of the present invention is to provide a construction machine, which employs the above rock breaking device, thereby improving construction efficiency.

The utility model is realized by the following steps:

a rock breaking device comprises a small arm, a first connecting piece, a second connecting piece and a breaking assembly; the first connector comprises a first hinge and a second hinge; the crushing assembly is hinged with the small arm, and the first connecting piece is hinged with the crushing assembly through the first hinge part and hinged with the second connecting piece through the second hinge part; the second connecting piece is also hinged with the small arm; the small arm, the first connecting piece, the second connecting piece and the crushing assembly form a four-bar linkage; the first or second connector includes a counterweight structure.

By providing a counterweight structure on the second attachment member, it is also possible to increase the downforce of the crushing assembly.

Further, the counterweight structure has a width greater than a width of the first hinge; or/and the distance from the first hinge to one end of the counterweight structure far away from the first hinge is larger than the distance between the first hinge and the second hinge, so that an extension part far away from the first hinge is formed.

The beneficial effect of above-mentioned design lies in, under the limited circumstances of the horizontal width of broken subassembly and actuating cylinder link, can make the width or the length of counter weight structure strengthen as far as possible to maximize the weight of counter weight structure. The greater the weight of the counterweight structure on the first attachment member, the greater the downforce it produces from the demolition hammer.

In addition, in the above-mentioned design, through set up first counter weight structure on first connecting piece, the weight of first counter weight structure can transmit to crushing unit on rigidly, is favorable to promoting crushing effect. Moreover, compared with the arrangement of the balance weight on the crushing assembly, the crushing assembly has better flexibility in the design. If the crushing unit downward pressure is provided by increasing the weight of the big arm or the small arm, the weight of the big arm and the small arm is difficult to be rigidly transferred to the crushing unit during the striking process of the crushing unit due to the compressibility of the hydraulic oil, and the larger impact force of the crushing unit is easy to damage the hydraulic element.

Further, the weight of the first link is greater than the weight of the small arm, for example greater than 50% of the weight of the small arm.

If the weight of the first connecting piece is too small, it may not significantly increase the downward pressure of the breaking hammer; therefore, the design can ensure that the lower pressure of the breaking hammer has larger lifting.

Further, the counterweight structure is a hollow structure, and fillers can be arranged in the counterweight structure. The beneficial effect of above-mentioned design lies in, on the one hand can reduce the manufacturing cost of first connecting piece, and on the other hand can be through the weight of adjusting the volume of filler to control first connecting piece.

Further, the crushing assembly is a crushing hammer; the counterweight structure is a first counterweight structure, and the width of the first counterweight structure is greater than that of the breaking hammer.

The design has the advantages that under the condition that the width of the breaking hammer is limited, the first counterweight structure can obtain relatively large width; and then can improve the holding down force of quartering hammer through the weight that improves first counter weight structure.

Further, the rock breaking device comprises two second connecting pieces, and the distance between the outer side faces of the two second connecting pieces is smaller than the width of the first counterweight structure.

The beneficial effect of above-mentioned design lies in, under the limited circumstances of forearm transverse width, first connecting piece can obtain the great transverse width relatively, and then can improve the overdraft of quartering hammer through the weight that improves first counter weight structure.

Furthermore, one surface of the counterweight structure, which faces the small arm, is a rear surface, and one surface of the counterweight structure, which faces away from the small arm, is a front surface; a line between the second hinge and the first hinge is a greater distance to the front than to the back.

Furthermore, one surface of the counterweight structure facing the small arm is a rear surface, and the other surface of the counterweight structure facing away from the small arm is a front surface; a line between the second hinge and the first hinge is a greater distance to the front than to the back.

The beneficial effect of above-mentioned design lies in guaranteeing that first connecting piece is difficult to take place under the circumstances of interfering with the forearm, can make the thickness (the preceding distance to the back that is) of first connecting piece increase to under the limited circumstances of whole installation space, increase the weight of first connecting piece.

Furthermore, the breaking hammer is hinged with the small arm through a first mounting part and is hinged with the first connecting piece through a second mounting part; the distance between the second hinge part and the first hinge part is larger than the distance between the first installation part and the second installation part.

The beneficial effect of the above design is that the first connecting piece can have a relatively large length in case the breaking hammer needs a relatively large swing angle. The reason for this is that: under the condition that the telescopic strokes of the oil cylinders are the same, the smaller the distance from the first installation part to the second installation part is, the larger the rotation angle of the breaking hammer is.

Furthermore, one surface of the first connecting piece facing the small arm is a rear surface, and the other surface of the first connecting piece facing away from the small arm is a front surface; an inclined plane is arranged at one end, close to the first hinge portion, of the counterweight, and the inclined plane and the front face of the first hinge portion are arranged in an obtuse angle mode.

The beneficial effect of above-mentioned design lies in, at the quartering hammer rotation in-process, guaranteeing to have under the reasonable turned angle condition, first connecting piece is difficult to take place to interfere with the relevant part of quartering hammer.

Further, the total weight of the first connecting piece and the second connecting piece is larger than the weight of the small arm.

Further, the crushing assembly is a ripper.

The first connecting piece is mechanically connected with the scarifier, the rigidity transmission capacity of the first connecting piece is relatively good in the process of transmitting gravity to the scarifier, energy loss of mechanical transmission is lower than that of hydraulic transmission in energy transmission, compared with the method that the scarifier cylinder is used for transmitting the gravity of the small arm in a large proportion to the scarifier, energy loss is less, the first connecting piece is more easily close to the front of the small arm, and more weight is more easily transmitted to the scarifier according to decomposition of the force.

Further, the weight of the first connecting piece is larger than that of the scarifier.

Such structure setting benefit lies in, and scarifier weight is less, is favorable to obtaining relatively less volume to be favorable to improving the flexibility of scarifier, first connecting piece weight is favorable to improving broken rock effect greatly.

Further, the first link has a weight greater than that of the large arm.

The rock breaking device is longitudinally closer to the scarifier under the condition that the total weight of the rock breaking device is limited, and the force decomposition analysis shows that a larger proportion of weight is rigidly transmitted to a rock stratum, so that the weight transmitted by the small arm oil cylinder is less, and the energy loss is reduced.

Furthermore, the counterweight structure is a second counterweight structure, the second counterweight structure includes a first counterweight block and a second counterweight block, and the first counterweight block and the second counterweight block are respectively located on two sides of the first hinge portion.

The structure has the advantages that in the operation process, the small arm rotates around the connecting point of the large arm and the small arm, the front part of the first connecting piece is easy to touch with an obstacle, for example, in slope operation, the front part is easy to touch with a slope in the rotation process of the small arm, if the front part of the first connecting piece is too large in size, the flexibility is not improved, and if the rear part of the first connecting piece is too large in size, the first connecting piece is easy to interfere with other parts (such as pipelines and the like) at the rear part; the spaces on the two sides are relatively difficult to interfere with other obstacles; the first connecting member has a relatively good flexibility in obtaining a relatively large volume and weight.

Further, a shortest distance a of the first hinge to the upper end of the counterweight structure is greater than a shortest distance B between the first hinge and the second hinge.

This arrangement has the advantage that the space below, forward and rearward of the first connecting member is limited and the space above is available, which facilitates a larger volume and thus a larger weight of the first connecting member.

Further, referring to fig. 19, the thickness D of the second counterweight structure is greater than the thickness E of the second hinge portion.

The structure arrangement has the advantages that the second hinge portion is hinged with the scarifier, the relatively small thickness of the second hinge portion is beneficial to cutting into a rock stratum, the large thickness of the counterweight structure is beneficial to the first connecting piece to obtain large weight, and therefore the scarifier has good downward cutting capacity when the first connecting piece obtains relatively large weight.

Further, when the ripper cylinder is completely retracted, the ripper cylinder is located between the first weight block and the second weight block at least over 30 percent in length in the lateral direction.

Such structure setting benefit lies in, makes counter weight structure and scarifier hydro-cylinder can be in horizontal sharing space on the first connecting piece, is favorable to reducing counter weight structure width on vertical in order to improve its flexibility, makes the scarifier hydro-cylinder be difficult to take place to touch with the barrier simultaneously.

Furthermore, the small arm is provided with a first limiting part, the first connecting piece is provided with a second limiting part, and the first limiting part can be in contact with or separated from the second limiting part; the first limiting part is matched with the second limiting part and used for limiting the position of the first connecting piece relative to the small arm.

Such structure setting benefit lies in, because first connecting piece has great weight, when the dismouting agitator, first connecting piece rotates around the third installation department easily and is difficult to control, takes place danger easily and be unfavorable for the dismouting, through the cooperation of first spacing portion and the spacing portion of second, can be with the rotation control of first connecting piece in the within range of settlement, and then be favorable to the dismouting of agitator.

Further, first spacing portion includes first spacing portion main part and rolling element, first spacing portion main part with rolling element rotatable coupling, the rolling element can with counterweight structure contact or separation.

Such structure sets up the benefit and lies in, when the relevant connection position of first connecting piece, agitator and forearm takes place wearing and tearing and lead to the clearance great, first balancing weight and second balancing weight take place the friction with the forearm easily, and then lead to the damage, and the setting of rolling element can make first balancing weight and second balancing weight and rolling element realize rolling contact, also carries on spacingly when reducing the damage.

Further, the counterweight structure is detachably connected with the first connecting piece.

The advantage of such a structural arrangement is that the weight and volume of the first connecting member can be adjusted to suit different operating requirements.

Furthermore, the first connecting piece comprises a counterweight structure and a first connecting piece body, and the counterweight structure is hinged with the first connecting piece body to form a first fulcrum of the counterweight structure; the small arm is provided with a roller which is rotatably connected with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part to form a second fulcrum of the counterweight structure; in the telescopic process of the driving oil cylinder, the counterweight structure moves relative to the small arm.

The structure has the advantages that compared with the counterweight structure and the first connecting piece body which are integrally arranged or connected by the bolt, under most states, the counterweight structure and the first connecting piece body can relatively rotate, so that the larger weight of the counterweight structure is not easily and rigidly transferred to the second mounting part, the tension on the second mounting part is smaller, and the pin shaft of the crushing assembly is favorably dismounted; the reason for this is that, when the counter weight structure and the first connecting member body are integrally provided or bolted, since the greater weight of the counter weight structure is easily and rigidly transmitted to the second mounting portion, the first mounting portion and the second mounting portion are easily tensioned, resulting in the crushing assembly not being easily disassembled.

Furthermore, the second connecting piece comprises a counterweight structure and a second connecting piece body, and the counterweight structure is rotatably connected with the second connecting piece body to form a fulcrum of the counterweight structure; the small arm is provided with a roller which is hinged with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part to form a fulcrum of the counterweight structure; in the telescopic process of the driving oil cylinder, the counterweight structure moves relative to the small arm.

The structure has the advantages that the counterweight structure and the second connecting piece body are integrally arranged or connected through the bolt, and under most states, the counterweight structure can relatively rotate due to the fact that the second connecting piece body and the counterweight structure can relatively rotate, so that the counterweight structure can obtain an ideal moving track, and the situation that the counterweight structure is easily touched with a front obstacle or a rear obstacle due to relatively large swing of the second connecting piece body is avoided.

A rock breaking device comprises a small arm, a counterweight structure and a breaking assembly; the crushing assembly is hinged with the small arm, one end of the driving oil cylinder is hinged with the small arm, and the other end of the driving oil cylinder is hinged with the crushing assembly; the crushing assembly is hinged with the counterweight structure to form a fulcrum of the counterweight structure; the small arm is provided with a roller which is hinged with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part to form a fulcrum of the counterweight structure; in the telescopic process of the driving oil cylinder, the counterweight structure moves relative to the small arm.

The structure has the advantages that the crushing assembly and the counterweight structure can rotate relatively in most states due to the fact that the crushing assembly and the counterweight structure can rotate relatively, ideal moving tracks of the counterweight structure can be obtained, and the crushing assembly is prevented from being easily touched with front or rear obstacles due to relatively large swing.

Further, the crushing component is a scarifier, and the weight of the counterweight structure is greater than that of the scarifier.

The weight of ripper for the counter weight structure is less for its volume is less, and is less can improve the flexibility of ripper, and the ripper of being convenient for goes into the rock. And the counterweight structure with larger weight is convenient for improving the undercut force of the scarifier.

A construction machine comprises a carrier and a rock breaking device, wherein the carrier is an excavator (the part of the excavator, which is used for removing a bucket and a small arm), and the carrier comprises a vehicle body, a large arm and a large arm oil cylinder; the rock breaking device further comprises a driving oil cylinder; one end of the driving oil cylinder is hinged with the small arm, and the other end of the driving oil cylinder is hinged with the first connecting piece or the second connecting piece; one end of the large arm is hinged to the vehicle body, the other end of the large arm is hinged to the small arm, one end of the large arm oil cylinder is hinged to the vehicle body, and the other end of the large arm oil cylinder is hinged to the large arm.

Further, the weight of the first connecting piece is larger than that of the large arm.

The beneficial effects of the technical scheme provided by the application at least comprise the following aspects:

the first connecting piece is relatively large in size, so that relatively large weight is obtained, and the weight of the first connecting piece is not required to be transmitted through an oil cylinder because the first connecting piece is hinged with a crushing assembly (such as a crushing hammer or a scarifier), so that the weight of a large arm and a small arm is increased; under the same condition of total weight of the large arm, the small arm, the first connecting piece and the crushing assembly, the weight with a larger proportion does not need to be transmitted through the oil cylinder, so that the rigid contact capacity of the crushing assembly and rock is improved, and the crushing assembly is favorably provided with relatively larger contact pressure when being struck. When the crushing assembly strikes rocks, the reaction force applied to the crushing assembly is transmitted to the oil cylinder through the first connecting piece and then transmitted to the hydraulic part, and the reaction force is unfavorable for the hydraulic part and the oil cylinder; for example, the sealing element of the oil cylinder is damaged early, and the larger the counterforce is, the larger the damage is. The first connecting piece with larger weight is beneficial to absorbing the reaction force, thereby being beneficial to reducing the reaction force transmitted to the oil cylinder; in addition, for increasing big arm and forearm weight, increase the weight of first connecting piece or second connecting piece and also be favorable to making gravity be closer to broken subassembly under different operation states to be favorable to increasing the contact pressure of broken subassembly and rock, improve the operating efficiency.

Compared with the increase of the weight of the crushing assembly, the crushing assembly has smaller volume and is beneficial to improving the flexibility of the crushing assembly; the reason is that compared with the first connecting piece and the second connecting piece, the crushing assembly is closer to the rock stratum, the counterweight structure is easier to interfere with the rock stratum, and the flexibility of the crushing assembly is reduced; in the operation process, sometimes the working face is leveled by the crushing assembly, and the flexibility is influenced by the overlarge size of the crushing assembly.

The counter weight structure of agitator is articulated with the agitator, makes the counter weight structure have more reasonable removal orbit, under the gravity rigidity that guarantees great proportion transmitted the rock stratum condition, the agitator has better flexibility.

Drawings

Fig. 1 is a schematic structural diagram of a rock breaking device provided in embodiment 1 of the present invention when a driving cylinder contracts;

FIG. 2 is a schematic structural view of another angle in FIG. 1 according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of the first connecting member in fig. 1 according to embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of a breaking hammer in example 1 of the present invention;

fig. 5 is a side view of a first connecting member provided in embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram of a driving cylinder of the rock breaking device in embodiment 1 provided by the utility model when extending;

FIG. 7 is a schematic structural diagram of a first connecting member according to another embodiment of the present invention;

FIG. 8 is a schematic view of another angle shown in FIG. 7 according to another embodiment of the present invention;

FIG. 9 is a schematic structural view of a first connecting member according to another embodiment of the present invention;

fig. 10 is a schematic structural view of a rock breaking device provided in embodiment 2 of the present invention;

fig. 11 is a schematic structural diagram of the first connecting member in fig. 1 according to embodiment 2 of the present invention;

fig. 12 is a schematic structural view of a breaking hammer in example 3 provided in example 2 of the present invention;

fig. 13 is a schematic structural diagram of a rock breaking device provided in embodiment 2 of the present invention when the driving cylinder is retracted;

FIG. 14 is a schematic view of another angle shown in FIG. 1 according to embodiment 4 of the present invention;

fig. 15 is a schematic structural diagram of another rock breaking device provided in embodiment 5 of the present invention, which is mounted on an excavator;

fig. 16 is a schematic structural view of fig. 15, in which the first connecting member is disassembled, according to embodiment 5 of the present invention;

fig. 17 is a schematic perspective view of a first connecting member according to embodiment 5 of the present invention;

fig. 18 is a side view of a first connecting member provided in embodiment 5 of the present invention;

fig. 19 is a front view of a first connecting member provided in embodiment 5 of the present invention;

fig. 20 is a schematic structural diagram of a rock breaking device provided in embodiment 5 of the present invention in a first state;

fig. 21 is a schematic structural diagram of a second state of the rock breaking device provided in embodiment 5 of the present invention;

fig. 22 is a schematic structural diagram of a third state of the rock breaking device provided in embodiment 5 of the present invention;

fig. 23 is a schematic structural diagram of a fourth state of the rock breaking device provided in embodiment 5 of the present invention;

fig. 24 is a schematic structural view of a fifth state of a rock breaking device provided in embodiment 6 of the present invention;

fig. 25 is a schematic structural diagram of a sixth state of the rock breaking device provided in embodiment 6 of the present invention;

fig. 26 is a schematic structural diagram of a rock breaking device provided in embodiment 6 of the present invention after the second connecting member is detached;

fig. 27 is a schematic structural view of a second connecting member provided in embodiment 5 of the present invention;

fig. 28 is a schematic structural diagram of a rock breaking device provided in embodiment 8 of the present invention;

fig. 29 is a schematic structural view of a first position-limiting portion in embodiment 8 of the present invention;

fig. 30 is a schematic view of a matching structure of the first position-limiting portion and the second position-limiting portion in embodiment 8 of the present invention.

FIG. 31 is an overall structural view of embodiment 9 of the present invention;

FIG. 32 is a partial exploded view of embodiment 9 of the present invention;

FIG. 33 is a structural view of a second joint member in embodiment 9 of the utility model;

FIG. 34 is an overall structural view of embodiment 10 of the present invention;

fig. 35 is a partial exploded view of example 10 of the present invention.

Icon: 3-forearm; 31-a support; 5-a first connecting member; 52-first connector body; 59-a first counterweight structure; 5141-a first weight; 5142-a second weight; 510-front; 511-back; 502-a second hinge; 501-a first hinge; 512-inclined plane; 513 — a reference plane; 6-a second connector; 61-a second counterweight structure; 62-a second connector body; 611-a guide; 4-a crushing assembly; 201-a first mounting portion; 202-a second mounting portion; 203-a third mounting portion; 204-a fourth mounting portion; 205-a fifth mount; 206-a sixth mounting portion; 7-driving the oil cylinder; 8-big arm; 9-a small arm oil cylinder; 10-lifting an oil cylinder; 14-a first stop; 141-a first stopper body; 142-rolling bodies; 15-a second limiting part; 16-roller.

Detailed Description

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

The width in the application refers to the axial direction of the hinged shaft of the driving oil cylinder and the first connecting piece. A hinge refers to a rotatable connection of two or more parts, which may for example comprise a pin and/or a connection hole, wherein one part can rotate around this position in relation to the other part. The distance between the two hinges is the distance between the centers of the two connection holes.

Referring to fig. 3, the second hinge portion 502 is located above the first hinge portion 501; in fig. 15, the direction from the front to the rear with reference to the driver is the longitudinal direction.

Example 1:

referring to fig. 1 and 2, the present embodiment provides a rock breaking device, which includes a small arm 3, a breaking assembly 4 (in the present embodiment, the breaking assembly is a breaking hammer), a first connecting member 5, a second connecting member 6 and a driving cylinder 7; wherein, interval is provided with first installation department 201 and second installation department 202 on broken subassembly 4, and the tip of forearm 3 is articulated with broken subassembly 4 through first installation department 201, and first connecting piece 5 is articulated with broken subassembly 4 through second installation department 202, and the one end of second connecting piece 6 is articulated with the middle part of forearm 3, the other end with first connecting piece 5 is articulated. One end of the driving oil cylinder 7 is hinged with the small arm 3, the other end of the driving oil cylinder is hinged with the first connecting piece 5, and when the driving oil cylinder 7 stretches, the driving oil cylinder 7 drives the first connecting piece 5 to move, so that the crushing assembly 4 is driven to swing.

Specifically, referring to fig. 2 and 3, the first connecting member 5 includes a first hinge portion 501, a second hinge portion 502 and a first counterweight structure 59 which are integrally formed. The first counterweight structure 59 is a massive structure; a first hinge 501 is provided at the lower end of the first counterweight structure 59 and a second hinge 502 is provided at the upper end of the first counterweight structure 59 (see fig. 1). The first hinge portion 501 is a connecting block disposed at the middle of the lower end of the first counterweight structure 59, and a through hole for mounting a hinge shaft is disposed on the connecting block. The second hinge portion 502 comprises two parallel and spaced-apart strip-shaped connecting plates, each of which is vertically disposed (with reference to the use state) and is provided with a through hole for mounting a hinge shaft.

The width of the first counterweight structure 59 is greater than the width of the first hinge 501; in particular, the first counterweight structure 59 comprises two external lateral surfaces, the distance of which is greater than the distance between the two external lateral surfaces of the connection block on the first articulation 501. The two side surfaces can be planes or arc surfaces. In case the lateral width of the connecting end of the crushing module 4 and the drive cylinder 7 is limited, the larger the width of the first counterweight structure 59, the larger its weight and the flexibility of the crushing module 4 will not be affected.

As shown in fig. 2 and 4, the breaking hammer comprises a body and two side plates, when the first connecting piece 5 is assembled with the breaking assembly 4, the first hinge part 501 is located between the two side plates, and the hinge shaft passes through the first hinge part 501 and through holes on the two side plates; at this time, both side surfaces of the first hinge portion 501 are respectively engaged with inner side surfaces of both side plates.

In other embodiments, the structure of the first hinge portion 501 is not limited to the above structure, and for example, two sets of connecting plates may be provided, each set including two adjacent connecting plates disposed at intervals; and the side plates at two sides of the shell of the crushing assembly 4 are respectively arranged between two adjacent connecting plates and are respectively hinged with the two groups of connecting plates.

In this embodiment, the width of the first counterweight structure is greater than the width of the breaking hammer; the width of the breaking hammer refers to the distance between the outer sides of the two side plates.

Further, in this embodiment, the weight of the first connecting member 5 is more than 50% of the weight of the small arm 3, which facilitates that more weight is mechanically transferred to the crushing assembly 4.

In particular, in this embodiment, the connecting rods are cast and weigh 2.5 tons, the large arm 3 weighs 3 tons, the small arm 3 weighs 3.5 tons, and the crushing assembly 4 weighs 3.2 tons. In addition, the distance between the two sides of the first counterweight structure 59 is 700 mm, and the distance between the two sides of the first hinge 501 is 300 mm; the distance between the two connecting plates on second hinge 502 is 140 mm. The distance between the inner sides of the two side plates of the crushing assembly 4 is 305 mm and the distance between the outer sides of the two side plates is 380 mm.

Further, referring to fig. 1 and 5, the distance between the second hinge part 502 and the first hinge part 501 of the first connecting member 5 is greater than the distance between the first mounting part 201 and the second mounting part 202 of the crushing assembly 4. This arrangement has the advantage that a greater length of the first connecting member 5 is obtained while ensuring a greater angle of rotation of the crushing assembly 4; the reason for this is that the smaller the distance from the first mounting portion 201 to the second mounting portion 202 is, the larger the rotation angle of the crushing unit 4 is, under the same telescopic stroke of the cylinder.

Referring to fig. 6, in order to further increase the weight of the first connecting member 5, the downward pressure of the crushing assembly 4 is increased; the distance D from the line between the first hinge 501 and the second hinge 502 to the front 510 of the first link 5 is greater than the distance C from the line to the rear 511 of the first link 5. The front face 510 of the first link 5 refers to the surface of the first link 5 facing away from the small arm 3, and the rear face 511 refers to the surface facing the small arm 3. For example, D may be 380 mm and C may be 80 mm.

The above design makes the thickness of the first connecting member 5 (i.e., the distance from the front surface 510 to the rear surface 511) large while ensuring that the first connecting member 5 does not easily interfere with the small arm 3, thereby increasing the weight of the first connecting member 5 in the case where the entire installation space is limited.

In addition, referring to fig. 7 and 8, in order to prevent the first counterweight structure 59 of the first connecting member 5 from interfering with the components on the crushing unit 4 during operation, the lower end of the first counterweight structure 59 is provided with an inclined surface 512, and the inclined surface 512 is arranged at an obtuse angle with the first hinge portion 501. Specifically, the first hinge 501 is provided with a reference surface 513, the reference surface 513 being substantially parallel to the rear surface 511 of the first counterweight structure 59 and intersecting the inclined surface 512. In a side view of the first connection portion, the inclined surface 512 is disposed at an obtuse angle to the reference surface 513.

With continued reference to fig. 5, normally the horizontal distance a from the centre of gravity of the first link 5 to the drill rod tip of the breaker assembly 4 will be smaller than the horizontal distance B from the centre of gravity of the small arm 3 to the drill rod tip of the breaker assembly 4, while the horizontal distance from the centre of gravity of the large arm to the drill rod tip of the breaker assembly 4 will be further; therefore, the increase of the weight of the first connecting member 5 relative to the increase of the weight of the boom 3 is also beneficial to make the gravity closer to the crushing assembly 4 under different operation conditions, thereby being beneficial to increase of the contact pressure of the crushing assembly 4 and the rock and improving the operation efficiency.

In addition, in other embodiments, the first connecting member 5 may also adopt the structure in fig. 9.

Example 2:

referring to fig. 10 to 13, the present embodiment provides another rock breaking device, which is substantially the same as that in embodiment 1, except that the distance from the first hinge portion 501 to the end of the first counterweight structure 59 away from the first hinge portion 501 is greater than the distance between the second hinge portion 502 and the first hinge portion 501; and the first connecting member 5 is a weldment.

Specifically, the first counterweight structure 59 includes an end distal from the first hinge 501 and an end proximal to the first hinge 501; for convenience of description, a distance from the first hinge portion 501 to an end of the first counterweight structure 59 away from the first hinge portion 501 is defined as L, and a distance from the second hinge portion 502 to a component of the first hinge portion 501 is defined as H, where L is greater than H in this embodiment; regarding the length of H, the second hinge 502 is more shaped, so the maximum distance between the first hinge and the second hinge is defined as the maximum distance; that is, the upper end of the first counterweight structure 59 extends away from the first hinge portion 501 to form an extended portion.

The above-described design facilitates a relatively large length of the first counterweight structure 59, and thus a large volume in a limited width, for a large weight.

Further, in this embodiment, the first connecting member 5 is a hollow welding member, and the first connecting member 5 is provided with a charging opening for charging filler.

Compared with embodiment 1, the present embodiment has a lower manufacturing cost, and is beneficial to reducing the width of the first counterweight structure 59 and further beneficial to increasing the flexibility of the first connecting member 5 in the transverse direction under the condition that the distances between the second hinge portion 502 and the first hinge portion 501 are the same. Moreover, when the driving cylinder 7 is contracted to the shortest, the first connecting piece 5 can only form an angle of 180 degrees with the driving cylinder 7 at most, so that the first counterweight structure 59 of the first connecting piece 5 extends in the direction away from the first hinge portion 501, and interference between the first counterweight structure 59 and the driving cylinder 7 is not caused.

Example 3:

the basic structure of the rock breaking device provided by the present embodiment is the same as that of embodiment 2, except that the width of the first counterweight structure 59 is smaller than that of the first hinge 501.

In particular, the connecting rods are cast and weigh 2.5 tonnes, the large arm 3 tonnes, the small arm 3 3.5 tonnes and the crushing assembly 4 3.2 tonnes.

The width of the first weight structure 59 (i.e., the distance between the two sides) is 270 mm, and in other embodiments, the width of the first weight structure 59 is the maximum distance between the two sides when the sides of the first weight structure 59 are other shapes. The width of the first hinge 501 (i.e., the distance between the two sides) is 320 mm and the width of the second hinge 502 (i.e., the distance between the two sides) is 280 mm. The distance L from the first hinge 501 to the end of the first weight structure 59 remote from the first hinge 501 is 1600 mm, and the distance H between the second hinge 502 and the first hinge 501 is 1000 mm. The distance D from the line connecting the first hinge 501 and the second hinge 502 to the outermost end of the front face 510 is 840 mm and the distance C from the line to the outermost end of the rear face 511 is 80 mm.

In this embodiment, the width of the first counterweight structure 59 is less than the width of the first hinge 501; although the width of the first counterweight structure 59 is relatively small, it is equally possible to obtain a relatively large weight due to the large length and thickness of the first counterweight structure 59, which in turn results in a relatively large downforce on the crushing assembly 4.

Example 4:

referring to fig. 14, the present embodiment provides another rock breaking device, which includes two second connecting members 6, wherein the two second connecting members 6 are respectively located at two sides of the small arm 3. The second connecting piece 6 is provided with a counterweight structure, and the single weight of the counterweight structure is 1.05 tons; the first connecting piece 5 is cast and weighs 0.5 ton, the big arm weighs 3 ton, the small arm 3 weighs 1.5 ton, and the crushing assembly 4 weighs 3.2 ton.

In the embodiment, the weight of the small arm 3 is relatively light, and the weight of the second connecting piece 6 is larger than that of the first connecting piece 5; the total weight of the first connecting piece 5 and the second connecting piece 6 can be larger, and when the weight of the small arm 3 is relatively light, the second connecting piece 6 can decompose the gravity onto the small arm 3 and the first connecting piece 5 through the hinged parts at the two ends of the second connecting piece. Since the second connecting member 6 is hinged with the small arm 3 and the first connecting member 5, and the first connecting member 5 is hinged with the crushing assembly 4, the rigid transmission capacity is better than the hydraulic transmission of the oil cylinder. Therefore, under the same gravity, the effect is better than that of a rock breaking device with the heavy weight of the small arm 3 and the smaller total weight of the first connecting piece 5 and the second connecting piece 6.

It should be noted that the above embodiments can be arbitrarily combined without conflict; for example, while the width of the first counterweight structure 59 is greater than that of the first hinge portion 501, the distance from the first hinge portion 501 to the end of the first counterweight structure 59 away from the first hinge portion 501 may be greater than the distance between the second hinge portion 502 and the first hinge portion 501. Additionally, in other embodiments, the first counterweight structure, the second hinge portion, and the first hinge portion may also be welded or bolted.

Example 5:

referring to fig. 15 and 16, the present embodiment provides another rock breaking device, which is different from embodiment 1 in that a ripper is used as the breaking assembly 4, and the first connecting member 5 has a different structure. The lower end of the small arm 3 is hinged with a first mounting part 201 on the scarifier, the lower end of the first connecting piece 5 is hinged with a second mounting part 202 on the scarifier, one end of the second connecting piece 6 is hinged with the small arm 3, and the other end of the second connecting piece is hinged with a second hinge part 502 on the first connecting piece 5.

Specifically, referring to fig. 17, the first connecting member 5 includes a body and a first weight structure 59; the first counterweight structure 59 comprises a first counterweight block 5141 and a second counterweight block 5142 symmetrically arranged on two sides of the body, and the two ends of the body are respectively provided with a second hinge portion 502 and a first hinge portion 501; the second hinge 502 is hinged to the driving cylinder 7 (in this example, a ripper cylinder), and the first hinge 501 is hinged to the ripper.

The advantage that set up counter weight structure on first connecting piece 5 is that first connecting piece 5 and the agitator belong to mechanical connection, and first connecting piece 5 is in the in-process of transmitting gravity to the agitator, and its rigidity transmission ability is better relatively. In the energy transmission, the energy loss of mechanical transmission is lower than that of hydraulic transmission, and the energy loss is less compared with the method that the gravity of the small arm 3 with a larger proportion is transmitted to the scarifier by the scarifier oil cylinder. Therefore, under the condition that the total weight of the rock breaking device is limited, the smaller the weight of the small arm 3 is, the smaller the energy loss of the oil cylinder of the scarifier is, and the larger the weight of the first connecting piece 5 is, the more the rigid contact capacity of the scarifier and a rock stratum is favorably improved, the more the rock breaking effect is favorably improved, and the scarifier has better flexibility.

In addition, the counterweight structure is provided as a first counterweight block 5141 and a second counterweight block 5142 which are symmetrical, and the two parts are respectively positioned at two sides of the body of the first connecting piece 5; the structure has the advantage that the small arm 3 rotates around the hinge part on the large arm 8 during operation, and the front part of the first connecting piece 5 is easy to touch with an obstacle. For example, in slope operation, the front part is more likely to touch the slope in the rotation process of the small arm 3, and if the front volume of the first connecting piece 5 is too large, the flexibility is not improved; if the rear of the first connecting member 5 is too bulky, it is liable to interfere with other parts (such as piping, etc.) at the rear. The spaces on both sides are relatively less prone to interference with other obstacles. The above-described design allows a relatively good flexibility of the first connecting piece 5 in obtaining a relatively large volume and weight. In other embodiments, the counterweight structure can be positioned in front, and the scarifier can also obtain better undercutting capability.

Referring to fig. 18, the shortest distance a from the second hinge portion 502 to the upper end of the counterweight structure is greater than the shortest distance B from the second hinge portion 502 to the first hinge portion 501; i.e. the counterweight structure extends in a direction towards the upper end of the small arm 3. In this embodiment, the shortest distance a from the second hinge portion 502 to the upper end of the counterweight structure is 1300 mm, and the shortest distance B from the first hinge portion 501 to the second hinge portion 502 is 800 mm.

This arrangement has the advantage that the space in front of and behind the first connecting part 5 is limited and that the space above is available, which is advantageous for a larger volume and thus a larger weight of the first connecting part 5.

Further, the first link 5 weighs more than the large arm 8. The structure has the advantages that under the condition that the total weight of the rock breaking device is limited, the gravity center of the rock breaking device is closer to the scarifier, and the force decomposition analysis shows that the weight with a larger proportion is rigidly transmitted to a rock stratum, so that the weight transmitted by the small arm 3 cylinder and the scarifier cylinder is less, and the energy loss is reduced.

Referring to fig. 19, the thickness D of the counterweight structure is greater than the thickness E of the first hinge portion 501; the thickness of the counterweight structure refers to the distance between two outer side surfaces of the hinge shaft in the axial direction; the thickness of the first hinge portion 501 refers to the distance between the two outer side surfaces thereof in the axial direction of the hinge shaft. In this embodiment, the thickness D of the counterweight structure is 1400 mm, and the thickness E of the first hinge portion 501 is 480 mm.

Such a structure has the advantage that the first hinge portion 501 is hinged to the ripper, and the thickness of the first hinge portion 501 is small, so that the ripper connected with the first hinge portion can be thin, and cutting into a rock formation can be facilitated with a relatively small thickness. The counterweight structure is thicker, so that the first connecting piece 5 can obtain larger weight, and the scarifier has better undercutting capability when the first connecting piece 5 obtains relatively larger weight.

Referring to fig. 20, when the ripper cylinder (i.e., the driving cylinder 7) is completely retracted, the length of the ripper cylinder is 2275 mm, and in a side view, the ripper cylinder is located between the first weight block 5141 and the second weight block 5142 by a minimum length of 1800 mm.

In some embodiments, since the shortest distance a from the upper end of the counterweight structure to the second hinge 502 is smaller, in this case, the thickness D of the counterweight structure is generally larger, so that the portion of the ripper cylinder between the first weight block 5141 and the second weight block 5142 is also smaller; however, in the present embodiment, it is preferable that the length of the ripper cylinder be thirty percent or more of the length of the ripper cylinder when completely retracted.

Such structure setting benefit lies in, makes counter weight structure and the agitator cylinder on the first connecting piece 5 can be in horizontal sharing space, is favorable to reducing the width of counter weight structure on vertical in order to improve its flexibility, makes the agitator cylinder be difficult to take place to touch with the barrier simultaneously.

The first balancing weight 5141 and the second balancing weight 5142 are provided with cavities, and fillers are arranged in the cavities; this arrangement has the advantage that the second connecting element 6 is less expensive to manufacture with a greater weight.

In addition, the first weight block 5141 and the second weight block 5142 are provided with mounting through holes, which are coaxial with the through holes of the second hinge portion 502.

Such a configuration provides the benefit of facilitating the removal and installation of the pin of second articulating portion 502 with a minimal impact on the bulk of the counterweight structure.

Analysis of beneficial effects:

in order to help understand that the counterweight structures are arranged on the first connecting piece 5, the second connecting piece 6 and the scarifier, and the difference of the rock breaking device in the operation flexibility is analyzed according to the change size of the rotation angle of the rock breaking device in different states, the larger the change of the rotation angle is, the easier the rock breaking device is to interfere with the obstacle in the longitudinal direction, and the poorer the flexibility is.

The same rock breaking device is used for example; in the following analysis, the horizontal line is used as a reference for the angle change.

The first link 5 is provided with a counterweight structure, and fig. 20 shows state 1, fig. 21 shows state 2, fig. 22 shows state 3, and fig. 23 shows state 4.

Referring to fig. 24, 25 and 26, the second link 6 is provided with a counterweight structure, fig. 24 being state 5, fig. 25 being state 6.

An included angle formed by a connecting line of the first installation part 201 and the second installation part 202 on the ripper and a horizontal line is a first included angle F, an included angle formed by a connecting line of the hinged parts at two ends of the second connecting piece 6 and the horizontal line is a second included angle J, and an included angle formed by a connecting line of the second hinged part 502 and the first hinged part 501 and the horizontal line is a third included angle H.

In the state 1 of fig. 20, the 1 st angle F is 60 °, the 2 nd angle J is 76.4 °, and the 3 rd angle H is 131 °;

in state 2 of fig. 21, the 1 st angle F is 16 °, the 2 nd angle J is 28.6 °, and the 3 rd angle H is 119 °;

in state 3 of fig. 22, the 1 st angle F is 5.92 ° below the horizontal, the 2 nd angle J is 7.2 °, and the 3 rd angle H is 114 °;

in state 4 of fig. 24, angle 1F is 55 ° below the horizontal, angle 2J is 43 ° below the horizontal, and angle 3H is 42 °;

in state 5 of fig. 25, the 1 st angle F is 60 °, the 2 nd angle J is 76.4 °, and the 3 rd angle H is 131 °;

in state 6 of fig. 26, angle 1, F, is 5.92 below horizontal, angle 2, J, is 7.2, and angle 3, H, is 114.

The angle changes of the 1 st included angle F, the 2 nd included angle J and the 3 rd included angle H in the above different states can be obtained, and the 3 rd included angle H has the minimum change in operation, and can also be understood as the angle change of the first connecting piece 5 is the minimum relative to the small arm 3.

In the state 1 and the state 5, the rock breaking device is in the same state; the difference is that in state 1 the first connecting member 5 is provided with a counter weight structure, and in state 5 the second connecting member 6 is provided with a counter weight structure.

In the states 3 and 6, the rock breaking device is in the same state; the difference is that in state 3 the first connecting member 5 is provided with a counter weight structure, and in state 6 the second connecting member 6 is provided with a counter weight structure.

The counterweight structures in the state 1 and the state 3 are the same, and the counterweight structures in the state 5 and the state 6 are the same;

in the state 1 and the state 5, the states of the counterweight structures are close; in the states 3 and 6, the state difference of the counterweight structure is large; in state 3, the counter weight structure top is closer to the rear, and in state 6, the counter weight structure top is closer to the place ahead, and the easier it interferes with the barrier in place ahead, and then influences the flexibility.

In state 4, the counterweight structure is most likely to contact with the rock formation during operation, and in state 6, the counterweight structure is most likely to contact with a front obstacle such as a slope.

The angle change and the graph analysis of different states can be combined to obtain that the change of the third included angle H relative to the 1 st included angle F and the 2 nd included angle J in the operation process is relatively minimum, so that the counterweight structure is arranged on the first connecting piece 5, and better flexibility can be obtained.

In addition, as the first connecting piece 5 is mechanically connected with the scarifier, when the weight of the first connecting piece 5 is relatively large, particularly when the weight of the first connecting piece 5 is larger than that of the small arm 3 or larger than that of the large arm 8, the weight transmission capacity of the rock breaking device is better than that of the large arm 8 or the weight of the small arm 3 is larger than that of the first connecting piece 5 under the condition that the total weight of the rock breaking device is the same.

Example 6:

referring to fig. 24-27, the present embodiment provides another rock breaking device, which has the same structure as that of embodiment 5, except that the second connecting member 6 includes a counterweight structure, and for convenience of description, the counterweight structure on the second connecting member 6 is referred to as a second counterweight structure 61.

Specifically, the second connecting member 6 includes two connecting portions and a second weight structure 61, which are integrally formed, and the second connecting member 6 is hinged to the small arm 3 and the second connecting member 6 through the two connecting portions, respectively. In other embodiments, the second weight structure 61 may also be welded or detachably connected to both connecting portions.

The second connecting piece 6 is provided with a counterweight structure, and the arrangement of the structure has the advantages that the second connecting piece 6 is mechanically connected with the scarifier through the first connecting piece 5, the second connecting piece 6 transmits part of gravity to the scarifier through force decomposition, the rigidity transmission capacity is relatively good, and the energy loss of mechanical transmission is lower than that of hydraulic transmission in the energy transmission. Energy losses are less relative to utilizing a ripper cylinder to transfer a greater proportion of gravity to the ripper. Therefore, under the limited circumstances of broken rock device total weight, the weight is less, and scarifier hydro-cylinder energy loss is less, and 6 weights of second connecting piece are bigger, are favorable to improving the rigid contact ability of scarifier and stratum more, are favorable to improving broken rock effect more. Because the both sides space that second connecting piece 6 can utilize to be located the ripper top, its relatively great volume is less to the flexibility influence of ripper, consequently, sets up counter weight portion for at the ripper, and the ripper has better flexibility.

Further, the second connecting piece 6 is heavier than the ripper. Such structure setting benefit lies in, and scarifier weight is less, is favorable to obtaining relatively less volume to be favorable to improving the flexibility of scarifier, 6 heavy improvement rock breaking effects that are favorable to of second connecting piece.

In addition, the second link 6 weighs more than the large arm 8. The advantage of such a structural arrangement is that, because the second connecting piece 6 is located closer to the ripper than the large arm 8, under the condition that the total weight of the rock breaking device is limited, the gravity center of the rock breaking device is longitudinally closer to the ripper, and through force decomposition analysis, a larger proportion of weight can be rigidly transferred to the rock stratum, so that the weight transferred by the small arm 3 oil cylinder is less, and the energy loss is reduced.

By combining embodiment 1 and embodiment 2, embodiment 1 has better flexibility than embodiment 2, and because the first connecting piece 5 is located closer to the front than the second connecting piece 6, under the condition that the total weight of the rock breaking device is the same, the weight transmitted to the ripper is more facilitated through the resolution of force. Embodiment 2 is more flexible than a ripper provided with a weight.

Example 7:

referring to fig. 20, the present embodiment provides an engineering construction machine, which includes a carrier and the rock breaking device according to any one of embodiments 1 to 7; the vehicle is an excavator and comprises a vehicle body, a traveling device and a large arm 8. The vehicle body comprises an upper vehicle body and a lower vehicle body, the upper vehicle body is rotatably connected to the lower vehicle body, one end of a large arm 8 is hinged with the upper vehicle body, and the other end of the large arm 8 is hinged with the small arm 3 through a fifth mounting part 205; one end of a lifting oil cylinder 10 is hinged with the upper vehicle body, the other end of the lifting oil cylinder 10 is hinged with the large arm 8, and one end of a small arm oil cylinder 9 is hinged with the large arm 8; the other end of the small arm oil cylinder 9 is hinged with the small arm 3, the small arm 3 is hinged with the crushing assembly 4 through a first mounting part 201, and one end of the driving oil cylinder 7 is hinged with the small arm 3; the other end of the driving oil cylinder 7 is hinged with the first connecting piece 5 through a third mounting part 203, and the other end of the first connecting piece 5 is hinged with the crushing assembly 4 through a second mounting part 202. One end of the second connecting piece 6 is hinged with the small arm 3 through the fourth mounting part 204, and the other end is hinged with the first connecting piece 5. The crushing assembly 4 may be a ripper or a breaking hammer.

Example 8:

referring to fig. 28 and 30, the small arm 3 is provided with a first position-limiting portion 14, the first position-limiting portion 14 includes a first position-limiting portion main body 141, and the first position-limiting portion main body 141 is a columnar structure, but the first position-limiting portion main body 141 may have other shapes. The first stopper portion 141 is welded to the arm 3 (other connection means may be used). The end far away from the small arm is provided with a rolling body 142; the first and second balancing weights 5141 and 5142 are provided with a second limiting portion 15. In this embodiment, the rolling element is a roller (in other embodiments, it may be a round ball or a cylinder), the second limiting portion 15 is a groove-shaped structure, and one end of the first limiting portion 14 away from the small arm 3 is located in the groove-shaped structure. During normal operation, the first limiting portion 14 does not contact with the groove-shaped structure, and during assembly and disassembly of the ripper, the first limiting portion 14 contacts with the groove-shaped structure to limit the positions of the first balancing weight 5141 and the second balancing weight 5142 relative to the small arm 3.

In other embodiments, the second position-limiting portion 15 may also be a curved strip-shaped structure, and in this case, the end of the first position-limiting portion 14 is a fork-shaped structure, which may also achieve the position-limiting engagement.

Such structure sets up the benefit and lies in, because first connecting piece 5 has great weight, when the dismouting agitator, first connecting piece 5 rotates around third installation department 203 easily and is difficult to control, takes place danger easily and be unfavorable for the dismouting, through the cooperation of first spacing portion 14 and the spacing portion 15 of second, can be in the within range of settlement with the rotation control of first connecting piece 5, and then be favorable to the dismouting of agitator.

In addition, when the relative connection parts of the first connecting piece 5, the scarifier and the forearm 3 are worn and the gap is large, the first balancing weight 5141 and the second balancing weight 5142 are easy to rub against the forearm 3, and further damage is caused, and the rolling bodies 142 are arranged, so that the first balancing weight 5141, the second balancing weight 5142 and the rolling bodies 142 are in rolling contact, and the limit is also carried out while the damage is reduced.

Further, the counterweight structure is detachably connected with the first connecting piece 5; this arrangement has the advantage that the weight and volume of the first connecting member 5 can be adjusted to suit different operating requirements.

Example 9:

referring to fig. 31, 32 and 33, the second connector 6 includes a second connector body 62 and a second weight structure 61; the second connector body 62 is provided with a third mounting part 203, a fourth mounting part 204 and a sixth mounting part 206; the second weight structure 61 and the second connector body 62 are hinged to the sixth mounting portion 206. The third mounting portion 203 is hinged to the first connector body 52. The fourth mounting portion 204 is hinged to the small arm 3. One end of the driving oil cylinder 7 is hinged with the small arm 3, and the other end of the driving oil cylinder 7 is hinged with the first connecting piece 5. The small arm 3 is provided with a support 31, the support 31 is rotatably provided with a roller 16, the roller 16 and the second counterweight structure 61 are provided with a guide part 611, and the roller 16 is matched with the guide part 611 to form a fulcrum of the counterweight structure; in the telescopic process of the driving oil cylinder 7, the counterweight structure moves up and down relative to the small arm 3, and the up-down direction is the length direction of the small arm 3.

The structure arrangement has the advantages that the second connector body 62 and the second counterweight structure can rotate relatively in most states, so that the second counterweight structure can obtain an ideal moving track, and the second connector body 62 is prevented from being easily touched with a front obstacle or a rear obstacle due to relatively large swing amplitude.

Example 10:

referring to fig. 34 and 35, the first link 5 includes a first weight structure 59 and a first link body 52. The first weight structure 59 and the first connecting member 5 are hinged to the third mounting portion 203. One end of the driving oil cylinder 7 is hinged with the small arm 3, and the other end of the driving oil cylinder 7 is hinged with the first connecting piece 5. The small arm 3 is provided with a roller 16, and the roller 16 is hinged with the small arm 3. The first weight structure 59 includes a first weight block 5141 and a second weight block 5142, and the inner side surfaces of the first weight block 5141 and the second weight block 5142 are respectively provided with a guide portion 611. The guide portion 611 has a groove-shaped structure, and the outer rock of the roller 16 is in rolling contact with the groove edge, and the groove edge limits the front and rear positions of the roller 16. The roller 16 is engaged with the guide portion 611, and the guide portion 611 has a function similar to that of the second limiting portion 15 in embodiment 8; which forms the fulcrum of the first counterweight structure 59. During the extension and contraction of the driving oil cylinder 7, the first counterweight structure 59 moves up and down relative to the small arm 3, and the up-down direction is the length direction of the small arm 3.

Such a structural arrangement is advantageous in that, compared to the first counterweight structure 59 integrally disposed with the first connecting member body 52 or bolted thereto, in most cases, since the first connecting member body 52 and the first counterweight structure 59 can rotate relatively, the larger weight of the first counterweight structure is not easily rigidly transferred to the second mounting portion 202, so that the tension applied to the second mounting portion 202 is smaller, which is advantageous for dismounting the pin shaft of the crushing assembly 4, because the larger weight of the first counterweight structure is easily rigidly transferred to the second mounting portion 202 when the first counterweight structure and the first connecting member 5 are integrally disposed or bolted thereto, the first mounting portion 201 and the second mounting portion 202 are easily tensioned, so that the crushing assembly 4 is not easily dismounted.

In other embodiments, the guiding portion 611 may also be a bump, and when the guiding portion 611 is a bump, the rollers 16 may be disposed in 2 numbers, respectively located at two sides of the bump.

Example 11:

in this embodiment, another rock breaking device (not shown in the drawings) is provided, and the first connecting piece 5 and the second connecting piece 6 are removed; the rock breaking device comprises a small arm 3, a counterweight structure and a breaking assembly 4; the crushing assembly 4 is hinged with the small arm 3, one end of the driving oil cylinder 7 is hinged with the small arm 3, and the other end of the driving oil cylinder 7 is hinged with the crushing assembly 4.

The crushing assembly 4 is provided with a counterweight structure; the crushing component 4 is hinged with the counterweight structure to form a fulcrum of the counterweight structure; the small arm 3 is provided with a roller 16, the roller 16 is hinged with the small arm 3, the counterweight structure is provided with a guide part 611, the structure of the guide part 611 and the matching mode of the guide part 611 and the roller 16 are the same as those of the embodiment 10, and the roller 16 is matched with the guide part 611 to form a fulcrum of the counterweight structure; in the process of stretching and retracting the driving oil cylinder 7, the counterweight structure moves relative to the length direction of the small arm 3, the length direction of the small arm 3 is the ideal moving direction of the counterweight structure, and the counterweight structure is not easy to touch with obstacles in the front-back direction.

Such structure setting benefit lies in, for the integrative setting of counter weight structure and broken subassembly or with bolted connection, under most state, because broken subassembly and counter weight structure can rotate relatively, be favorable to making the counter weight structure obtain more ideal removal orbit, avoided broken subassembly because relatively great swing amplitude leads to counter weight structure to take place to touch with place ahead or rear obstacle easily.

Further, crushing unit is the agitator, and the weight of counter weight structure is greater than the weight of agitator. The weight of the scarifier relative to the counterweight structure is smaller, so that the size of the scarifier is smaller, the flexibility of the scarifier can be improved due to the smaller weight, and the scarifier can enter rocks conveniently; and the counterweight structure with larger weight is convenient for improving the undercut force of the scarifier. The above description is only a preferred embodiment of the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (25)

1. A rock breaking device comprises a small arm, a first connecting piece, a second connecting piece and a breaking assembly; the first connector comprises a first hinge and a second hinge;

the crushing assembly is hinged with the small arm, and the first connecting piece is hinged with the crushing assembly through the first hinge part and hinged with the second connecting piece through the second hinge part; the second connecting piece is also hinged with the small arm; one end of the driving oil cylinder is hinged with the small arm, and the other end of the driving oil cylinder is hinged with the first connecting piece; the small arm, the first connecting piece, the second connecting piece and the crushing assembly form a four-bar linkage;

characterized in that the first or second connecting member comprises a counterweight structure.

2. A rock breaking device according to claim 1, wherein the counterweight structure has a width greater than a width of the first hinge;

or/and the distance from the first hinge to one end of the counterweight structure far away from the first hinge is larger than the distance between the first hinge and the second hinge, so that an extension part far away from the first hinge is formed.

3. A rock breaking device according to claim 1, wherein the weight of the first link is greater than the weight of the forearm.

4. A rock breaking device according to claim 1, wherein the counterweight structure is a hollow structure and a filler is disposed within the counterweight structure.

5. A rock breaking device according to any one of claims 1 to 4, wherein the breaking assembly is a breaking hammer.

6. A rock breaking device according to claim 5, wherein the counterweight structure is a first counterweight structure having a width greater than a width of the breaking hammer.

7. A breaking device according to claim 6, characterized in that the breaking device comprises two of the second connecting pieces, the distance between the outer sides of which is smaller than the width of the first counterweight structure.

8. A rock breaking device according to claim 6, wherein the side of the first counterweight structure facing the forearm is the rear and the side facing away from the forearm is the front; a line between the second hinge and the first hinge is a greater distance from the front than the line from the back.

9. A rock breaking device according to claim 6, wherein the side of the first connection member facing the arm is rearward and the side facing away from the arm is forward;

an inclined plane is arranged at one end, close to the first hinge portion, of the first counterweight structure, and the inclined plane and the first hinge portion are arranged in an obtuse angle mode.

10. A rock breaking device according to claim 5, wherein the breaking hammer is hinged to the forearm by a first mounting portion and to the first connection by a second mounting portion;

the distance between the first hinge part and the second hinge part is larger than the distance between the first installation part and the second installation part.

11. A rock breaking apparatus according to any one of claims 1 to 4, wherein the breaking assembly is a ripper.

12. The rock breaking device of claim 11, wherein the first link has a weight greater than a weight of the ripper.

13. A rock breaking device according to claim 11, wherein the counterweight structure is a second counterweight structure including a first counterweight block and a second counterweight block, the first and second counterweight blocks being located on either side of the first hinge.

14. The rock breaking device of claim 13, wherein the first counterweight block and the second counterweight block are each provided with a mounting through hole; the mounting through hole is coaxially arranged with the hinge hole on the first hinge part.

15. A rock breaking apparatus according to claim 13, wherein when the drive cylinder is fully retracted, at least 30% of the length of the drive cylinder is between the first and second weights.

16. A rock breaking device according to claim 13, wherein the first hinge is at a greater distance to the upper end of the second counterweight structure than the first hinge and the second hinge.

17. A rock breaking device according to claim 11, wherein the forearm is provided with a first stop portion and the first connection member is provided with a second stop portion, the first stop portion being able to contact or separate from the second stop portion; the first limiting part is matched with the second limiting part and used for limiting the position of the first connecting piece relative to the small arm.

18. The rock breaking device of claim 17, wherein the first limiting portion comprises a first limiting portion body and a rolling body, the first limiting portion body is rotatably connected with the rolling body, and the rolling body can be in contact with or separated from the counterweight structure.

19. A rock breaking device according to claim 11, wherein the counterweight structure is detachably connected to the first connection member.

20. A rock breaking device according to claim 1, wherein the first connector includes a counterweight structure and a first connector body, the counterweight structure being hingedly connected to the first connector body;

the small arm is provided with a roller which is rotatably connected with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part; and in the process of stretching and retracting the driving oil cylinder, the counterweight structure moves relative to the small arm.

21. The rock breaking device of claim 1, wherein the second connector comprises a counterweight structure and a second connector body, the counterweight structure being hinged to the second connector body; the small arm is provided with a roller which is rotatably connected with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part; in the telescopic process of the driving oil cylinder, the counterweight structure can move relative to the small arm.

22. A rock breaking device is characterized by comprising a small arm, a breaking assembly and a counterweight structure; the crushing assembly is hinged with the small arm, one end of the driving oil cylinder is hinged with the small arm, and the other end of the driving oil cylinder is hinged with the crushing assembly;

the counterweight structure is hinged with the crushing assembly to form a fulcrum of the counterweight structure; the small arm is provided with a roller which is hinged with the small arm, the counterweight structure is provided with a guide part, and the roller is matched with the guide part; in the telescopic process of the driving oil cylinder, the counterweight structure can move relative to the small arm.

23. The rock breaking device of claim 22, wherein the breaking assembly is a ripper and the weight of the counterweight structure is greater than the weight of the ripper.

24. A construction machine, characterized in that the construction machine comprises a carrier and a rock breaking device according to any one of claims 1-23; the carrier is an excavator and comprises an upper vehicle body, a lower vehicle body and a large arm; the upper vehicle body is rotatably connected with the lower vehicle body; one end of the big arm is hinged with the upper vehicle body, and the other end of the big arm is hinged with the small arm.

25. The work machine of claim 24, wherein the weight of said first link is greater than the weight of the large arm.

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