WO2013026199A1

WO2013026199A1 - Coupling device for hydraulic elements and hydraulic element set and engineering machinery

Info

Publication number: WO2013026199A1
Application number: PCT/CN2011/078839
Authority: WO
Inventors: 裴杰
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-08-24
Filing date: 2011-08-24
Publication date: 2013-02-28

Abstract

Disclosed is a coupling device (30) for hydraulic elements, which coupling device (30) is used for connecting a first hydraulic element (10) having a first oil port (11) with a second hydraulic element (20) having a second oil port (21), wherein the coupling device (30) comprises at least three valve blocks communicated between the first oil port (11) and the second oil port (21), two of the at least three valve blocks abutting the first oil port (11) and the second oil port (12) respectively, and among the abutting surfaces between any two adjacent valve blocks of the at least three valve blocks, the abutting surfaces between the at least three valve blocks and the first oil port (11) and the abutting surfaces between the at least three valve blocks and the second oil port (21), three surfaces being perpendicular to each other. The coupling device can ensure a tight abutment between each of the valve blocks of the coupling device, so as to prevent oil leakage. Also disclosed are a hydraulic element set and engineering machinery.

Description

Connecting device and hydraulic component group of hydraulic component and engineering machinery

The present invention relates to the field of hydraulics, and in particular to a connecting device for a hydraulic component and a hydraulic component group including the connecting device, and the present invention also relates to a construction machine including the hydraulic component group. Background technique

In the hydraulic field, it is often the case that two hydraulic components are connected. The hydraulic component may be a cylinder or a valve block or the like.

Shown in Fig. 1 is a flexible connection hydraulic component group commonly used in the prior art, the hydraulic component group including a first hydraulic component 10 of a first port 11, and a second hydraulic component having a second port 21. 20, and a hose 50 that connects the first port 11 and the second port 21. The hose 50 has a good sealing property. However, the hose 50 has a large size and cannot be used in a space where the installation space is limited.

In order to keep the hydraulic component group from being limited by the installation space, it is also possible to connect adjacent hydraulic components to each other by means of a valve block. However, this type of connection requires that the surfaces of the first port 11 and the second port 21 of the adjacent two hydraulic components have a high precision (e.g., coplanarity). If the corresponding accuracy requirements are not met, it is easy to leak oil.

Therefore, how to provide a hydraulic component that is neither restricted by the installation space nor has a good sealing performance constitutes a technical problem to be solved in the art. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a connecting device for connecting hydraulic components that is not limited by the installation space and that has better sealing properties. The present invention also provides a hydraulic component group including the connecting device, and the present invention also relates to a construction machine including the hydraulic component group. In order to achieve the above object, as an aspect of the present invention, a connecting device for a hydraulic component is provided, the connecting device for connecting a first hydraulic component having a first port and a second hydraulic component having a second port, characterized in that The connecting device includes at least three valve blocks that communicate between the first port and the second port, two of the at least three valve blocks and the first port and The second oil port is attached to the surface, the surface of any of the at least three valve blocks that is adjacent to the two valve blocks, and the surface of the at least three valve blocks that are in contact with the first oil port And three of the surfaces of the at least three valve blocks that are in contact with the second port are perpendicular to each other.

Preferably, the at least three valve blocks include a first valve block in communication with the first port, a second valve block in communication with the second port, and the first valve block and the The third valve block of the second valve block.

Preferably, the third valve block is plural.

Preferably, the third valve block includes an intermediate valve block and an adjustment valve block, the intermediate valve block is in contact with the second valve block, the adjustment valve block is in communication with the first valve block and the Between the intermediate valve blocks, and two adjacent surfaces on the adjustment valve block are respectively engaged with the first valve block and the intermediate valve block.

Preferably, between the first valve block and the regulating valve block, and/or between the adjusting valve block and the intermediate valve block, and/or between the second valve block and the intermediate valve block It can move relative to each other in the fitted state.

Preferably, the connecting device further includes a first fastener, and the first valve block and the adjusting valve block are formed with a first small hole, the adjusting valve block and the first valve The other of the blocks is formed with a first large hole coaxially and in one-to-one correspondence with the first small hole, the first large hole has an aperture smaller than an aperture of the first small hole and the first tight The diameter of the firmware is 0.5 to 2 mm in diameter, and the first fastener is tightly fitted to the first small hole through the first large hole to connect the first valve block and the adjustment valve block.

Preferably, the connecting device further includes a plurality of second fasteners, and the adjusting block and the intermediate block are formed with a plurality of second small holes, the intermediate valve block and the adjusting valve block Another in Forming a plurality of second large holes coaxially and in one-to-one correspondence with the plurality of second small holes, the second large holes having an aperture smaller than an aperture of the second small holes and the second tight The diameter of the fastener is 0.5 to 2 mm in diameter, and the second fastener is tightly fitted to the second orifice through the second large hole to connect the intermediate valve block to the adjustment valve block.

Preferably, the connecting device further includes a plurality of third fasteners, and a plurality of third small holes are formed in one of the second valve block and the intermediate valve block, the intermediate valve block and the intermediate valve block The other of the second valve blocks is formed with a plurality of third large holes coaxially and in one-to-one correspondence with the plurality of third small holes, the third large holes having an aperture smaller than that of the third small holes The aperture and the diameter of the third fastener are 0.5 to 2 mm, and the third fastener is closely fitted with the third aperture through the third large hole to connect the second valve block with The intermediate valve blocks are connected.

Preferably, a seal is arranged between the valve block and the first port, and/or between the valve block and the second port, and/or between two adjacent valve blocks ring.

Preferably, the connecting device further includes a shutoff valve in communication with one of the valve blocks to control the opening and closing of the oil passage in the connecting device.

As another aspect of the present invention, a hydraulic component group is provided, the hydraulic component group including a first hydraulic component having a first port, a second hydraulic component having a second port, and a communication component, wherein The communication component is the above-described communication component provided in the present invention, and two of the at least three valve blocks of the communication component respectively correspond to the first oil port and the second hydraulic component of the first hydraulic component The second port is attached and connected.

Preferably, the first hydraulic component and the second hydraulic component are both cylinders.

As still another aspect of the present invention, a construction machine is provided, wherein the construction machine includes the above-described hydraulic component group provided by the present invention.

The connecting device has three faces perpendicular to each other, so that the deflection of the surface of the at least three valve blocks that is in contact with the second hydraulic component can be converted into at least three valve blocks by the adjustment of the valve block and the first The surface of the hydraulic component that is fitted to the surface rotates around its normal line, thereby ensuring a close fit between the various valve blocks of the connecting device, and ensuring the valve block of the connecting device and the first hydraulic component and The second hydraulic component is in close contact to prevent oil leakage. Moreover, the connection between the connecting devices according to the present invention is a rigid connection, and the installation space has less restrictions on the connecting device.

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are in the It should be noted that although the first hydraulic component and the second hydraulic component are both in the form of a cylinder, it will be understood by those skilled in the art that the first hydraulic component and the second hydraulic component are not limited to being cylinders. It is also possible to use other various hydraulic components, for example, the first hydraulic component and the second hydraulic component may also be various valves. In the drawing:

Figure 1 is a schematic view of a hydraulic component group using a flexible connection in the prior art;

2 is a schematic view of a hydraulic component group to which connection devices are connected in accordance with an embodiment of the present invention;

Figure 3 is a schematic view of a hydraulic component group connected by a connecting device according to another embodiment of the present invention;

Figure 4 is a schematic view of the connecting device of Figure 3;

Figure 5 is a schematic view showing the realization of the close fitting of the adjusting device of the connecting device of Figure 4;

Figure 6 is a schematic view of a hydraulic component group connected by a connecting device in accordance with still another preferred embodiment of the present invention;

Figure 7 is a partial schematic view of the connecting device shown in Figure 3 with the cartridge valve installed; and Figure 8 is a schematic view of the connection of the first valve block to the regulating valve block in accordance with the present invention. detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

As shown in FIGS. 2 to 8, the present invention provides a connecting device 30 for a hydraulic component for connecting a first hydraulic component 10 having a first port 11 and a second port having a second port 21 a second hydraulic component 20, wherein the connecting device 30 includes at least three valve blocks that communicate between the first port 11 and the second port 21, two of the at least three valve blocks and the first port 11 respectively And a second oil port 21, a surface of any one of the at least three valve blocks that is adjacent to the two valve blocks, a surface of the at least three valve blocks that is in contact with the first oil port 11 and Three of the surfaces of the at least three valve blocks that are in contact with the second port 21 are perpendicular to each other.

It is well known that three mutually perpendicular surfaces may have six degrees of freedom, gp, the rotation of the three surfaces about their respective normals and the offset of the various surfaces of the faces. Therefore, when the plane in which the first port 11 or the second port 21 is located is shifted (that is, when the two planes are not perpendicular to each other or are not parallel to each other), the valve block that is in contact with the first port 11 is also Corresponding skew occurs. In three mutually perpendicular surfaces, when a surface is offset, the surface adjacent to the surface and the vertical surface is correspondingly offset, when the offset is transmitted to three mutually perpendicular surfaces. The third time has been converted to the rotation of the surface around its normal, so that the third surface still adheres to the second port 21 or the first port 11.

In particular, the at least three valve blocks may include a first valve block 31 in communication with the first port 11, a second valve block 32 in communication with the second port 21, and a first valve block 31 and The third valve block of the two valve block 32.

The third valve block may be one or more. When the third valve block is one, the surface of the first valve block 31 that is in contact with the first oil port 11, the surface of the first valve block 31 that is in contact with the third valve block, the second valve block 32 and the second oil The surface of the mouth-fitting surface and the surface of the second valve block 32 that is in contact with the third valve block have three surfaces perpendicular to each other. In an embodiment according to the present invention as shown in FIG. 2, in this embodiment, a third valve block is communicated between the first valve block 31 and the second valve block 32, and the first valve block 31 is The surface on which the first port 11 is fitted, the surface on which the first valve block 31 is attached to the third valve block, and the surface on which the second valve block 32 and the third valve block are attached are perpendicular to each other (just three are perpendicular to each other) Surface), when the surface of the second valve block 32 and the second port 21 are offset, whether it is offset front or rear or left and right, the transmission of the third valve block can always convert the offset into The rotation of the first valve block 31 about its normal line ensures a sealing seal between the third valve block and the first valve block 31.

When the third valve block is plural, the surface of the first valve block 31 that is in contact with the first oil port 11, the surface of the first valve block 31 that is in contact with the third valve block, the second valve block 32 and the second The surface to which the port is fitted, the surface to which the second valve block 32 is attached to the third valve block, and the surface to which any two adjacent third valve blocks are attached are three surfaces which are perpendicular to each other.

3 and 4 are other embodiments of the present invention. In this embodiment, the third valve block is plural (the third valve block shown in the figure is two, the intermediate valve block 33). And adjust the valve block 34).

As shown in the figure, the central axes of the first port 11 and the second port 21 are parallel to each other. As shown in the figure, the connecting device 30 further includes an intermediate valve block 33 for communicating the first valve block 31 and the second valve block 32, wherein the connecting device 30 further includes a regulating valve block 34, which is connected to the valve block 34. Between the first valve block 31 and the intermediate valve block 33, the adjacent two surfaces on the regulating valve block 34 are respectively fitted to the first valve block 31 and the intermediate valve block 33. In the connecting device 30, the surface of the first valve block 31 that is in contact with the first hydraulic component 10, the surface of the first valve block 31 that is in contact with the regulating valve block 34, and the second valve block 32 and the intermediate valve block 33 The conforming surfaces are perpendicular to each other.

Figure 5 is a schematic view showing the close fitting between the hydraulic components by the connecting means in Figures 3 and 4, wherein the two-dot chain line shows the first valve block 31, the second valve block 32, and the intermediate valve block. 33 and the position after the adjustment valve block 34 is rotated by the angle α. As shown in the figure, the kneading surface is the plane where the first port 11 is located, the A' surface is the surface of the first valve block 31 that is in contact with the A surface; the B surface is the plane where the second port 21 is located, B' The surface is the surface of the second valve block 32 that is in contact with the B surface; the C surface is the surface of the first valve block 31 that is in contact with the adjustment valve block 34, and the E surface is the surface of the adjustment valve block 34 that is attached to the C surface. The surface D is the surface of the adjustment valve block 34 which is in contact with the intermediate valve block 33, and the F surface is the surface of the intermediate valve block 33 which is in contact with the D surface; the H surface is the second valve block 32 and the intermediate valve block. The surface of the 33-contact surface, the F-face is the surface of the intermediate valve block 33 that is in contact with the H-face.

When the first hydraulic component 10 and the second hydraulic component 20 are connected, the first valve block 31 is first fixed, the A' surface is bonded to the A surface, and then the second valve block 32 is fixed to the B' face and the B side. fit. In order to prevent oil leakage between the connecting device 30 and the first hydraulic component 10 and the second hydraulic component 20, the above surfaces should be closely adhered. At this time, if the B surface and the A surface are not in the same plane, as shown in FIG. In the case shown, the B-face is inclined upward by an angle α with respect to the plane in which the A-plane is located, so that the B'-face of the second valve block 32 is also rotated upward by an angle a, thereby causing the kneading surface to be upward relative to the original state. The angle α is rotated, and accordingly, the F plane is also rotated upward by an angle α. When the angle is transmitted to the adjustment valve block 34, D faces the upper rotation angle α, but the face that is in contact with the first valve block 31 only rotates around the normal of the face, still in the vertical plane. . Therefore, the surface C of the first valve block 31 which is in contact with the regulating valve block 34 is not rotated or deflected, thereby ensuring the seal between the first valve block 31 and the first port 11.

It can be seen from the above description that when the connecting device of the present invention is installed, it is only necessary to ensure that the kneading surface where the first oil port 11 is located is in close contact with the surface of the first valve block 31, and the surface is flush with the surface. The surface is perpendicular to the central axis of the first hydraulic component 10 to ensure the sealing of the connecting device, and there is no strict requirement for the coplanarity of the face and the B face, the A' face and the B' face, and the B is also reduced. The accuracy of the face perpendicular to the central axis of the second hydraulic component 20 is required. Thereby, the requirement for the mounting accuracy between the connecting device 30 and the first hydraulic component 10 and the second hydraulic component 20 is reduced. Further, the connecting device 30 of the present invention is a rigid connecting device and is limited by the installation space of the hydraulic component.

It should be noted that when there are a plurality of third valve blocks, the surface of the first valve block 31 and the first valve port 11 and the surface of the first valve block 31 and the third valve block are ensured. The surface of the second valve block 32 that is in contact with the second port, the surface on which the second valve block 32 is attached to the third valve block, and the surface on which any two adjacent third valve blocks are attached have three surfaces. Vertically to each other, to multiple thirds There is no special requirement between the valve blocks and the mutual position of the first valve block 31 and the third valve block, the second valve block and the third valve block. For example, in the connecting device shown in FIG. 4, the regulating valve block 34 may also be located on the right side of the first valve block 31. Of course, the adjustment valve block 34 can also be engaged with the second valve block 32, and the second valve block 32 and the intermediate valve block 33 respectively abut the adjacent two faces of the adjustment valve block 34. The present invention is not particularly limited in terms of adjusting the position of the valve block as long as the sealing connection between the first hydraulic component 10 and the second hydraulic component 20 can be achieved.

Therefore, when the adjustment adjusting device 30 obtains the seal, there are six degrees of freedom of adjustment, so that the plane in which the first port 11 of the first hydraulic member 10 is located and the second port 21 of the second hydraulic member 20 are located. The relationship between the normals of the plane (for example, parallel or vertical) can achieve a seal between the connecting devices 30 by adjusting the above three faces. For example, as shown in FIG. 6, the normal of the plane of the first port 11 of the first hydraulic component 10 is perpendicular to the plane of the second port 21 of the second hydraulic component 20, and can also pass through the connecting device 30. A hydraulically sealed connection between the first element 10 and the second hydraulic element 20 is achieved.

a surface of the first valve block 31 that is in contact with the first oil port 11, a surface on which the first valve block 31 is in contact with the third valve block, a surface in contact with the third valve block, and a second valve block 32. The surface that is in contact with the third valve block can be referred to as an adjustment surface. It can be known from the above two embodiments that in the present invention, only three mutually perpendicular adjustment surfaces need to be ensured, preferably, as far as possible Reduce the number of adjustment surfaces.

Preferably, between the first valve block 31 and the adjustment valve block 34, and/or between the adjustment valve block 34 and the intermediate valve block 33, and/or between the second valve block 32 and the intermediate valve block 33 In the state of being able to move relative to each other. As used herein, "relative movement" refers to relative rotation, or relative translation. After the connecting device 30 is thus disposed, the connecting device 30 and the first hydraulic component 10 and the second hydraulic component 20 can be assembled first, and then the first valve block 31 and the regulating valve block 34 are adjusted, and/or the valve block is adjusted. The relative movement between the 34 and the intermediate valve block 33, and/or between the second valve block 32 and the intermediate valve block 33 can achieve a seal between the connecting device 30 and the first hydraulic element 10 and the second hydraulic element 20. The relative movement between the first valve block 31 and the adjustment valve block 34 in the state of maintaining the fit can be obtained as follows: As shown in FIG. 8, the connection device 30 further includes a plurality of first fasteners 30a, first A plurality of first small holes l la are formed on one of the valve block 31 and the regulating valve block 34, and the other one of the adjusting valve block 34 and the first valve block 31 is formed with the plurality of first small holes The hole 11a is coaxial and one-to-one corresponding to the first large hole 31a. The diameter of the first large hole 31a is larger than the diameter of the first small hole 11a and the diameter of the fastener 30a by 0.5 to 2 mm, and the first fastener 30a is worn. The first large hole 31a is closely fitted with the first small hole 11a to connect the first valve block 31 and the adjustment valve block 34. The first fastener 30a is movable in the first large hole 31a, so that the relative movement between the first valve block 31 and the adjustment valve block 34 in the state of maintaining the fit can be achieved.

The first fastener 30a may be a bolt or a screw, and accordingly, the first small hole 11a may be a light hole or a threaded hole. The first fastener 30a can also be a pin that can form a tight fit with the first aperture 11a to bring the first valve block 31 into close contact with the adjustment valve block 34.

Similarly, the relative movement between the adjustment valve block 34 and the intermediate valve block 33 in the state of maintaining the fit can be obtained as follows: The connecting device 30 further includes a plurality of second fasteners, the adjustment block 34 and the intermediate block 33. a plurality of second small holes are formed in one of the intermediate valve block 33 and the adjustment valve block 34, and a plurality of second ones are coaxially and one-to-one corresponding to the plurality of second small holes a large hole having an aperture smaller than a diameter of the second small hole and a diameter of the second fastener by 0.5 to 2 mm, wherein the second fastener passes through the second large hole The second aperture is mated to connect the intermediate valve block 33 to the adjustment valve block 34. Movement of the second fastener in the second large hole causes relative movement between the adjustment valve block 34 and the intermediate valve block 33 in a state of maintaining fit.

The second fastener may also be a bolt or a screw, and accordingly, the second aperture may be a light aperture or a threaded aperture. The second fastener may also be a pin that is capable of forming a tight fit with the second aperture such that the intermediate valve block 33 and the adjustment valve block 34 fit snugly.

Similarly, the relative movement of the second valve block 32 and the intermediate valve block 33 in the held-fit state can be obtained as follows: The connecting device 30 further includes a plurality of third fasteners, the second valve block 32 A plurality of third small holes are formed in one of the intermediate valve blocks 33, and the other one of the intermediate valve block 33 and the second valve block 32 is formed coaxially and in one-to-one correspondence with the third small holes a plurality of third largest holes, the plurality of third large holes having an aperture larger than a diameter of the third small holes and a diameter of the third fastener by 0.5 to 2 mm, the third fastener passing through The third large hole cooperates with the third small hole to connect the second valve block 32 with the intermediate valve block 33. The relative movement between the second valve block 32 and the intermediate valve block 33 in the state of maintaining the fit is achieved by the movement of the third fastener in the third large hole.

The third fastener may also be a bolt or a screw, and accordingly, the third aperture may be a light aperture or a threaded aperture. The third fastener may also be a pin that is capable of forming a tight fit with the third aperture such that the intermediate valve block 33 and the second valve block 32 fit snugly.

The aperture of the first large hole 31a and the aperture of the first small hole 11a, the aperture of the second large hole and the second small hole, and the apertures of the third large hole and the third small hole may be according to the first of the first hydraulic component 10 The degree of non-coplanarity between the plane in which the port 11 is located and the plane in which the second port of the second hydraulic component 20 is located is determined.

For convenience of description, the first fastener, the first large hole, and the first small hole are referred to herein as a first fastening combination, and the second fastener, the second large hole, and the second small hole are referred to as a second Fastening the combination, and forming the third fastener, the third large hole, and the third small hole into a third fastening combination, the first fastening combination, the second fastening combination, and the third fastening combination are It is not limited to the citation relationship recited in the claims, but may be provided in combination two or two or that the first fastening combination, the second fastening combination and the third fastening combination are simultaneously provided, in particular according to the first hydraulic component 10 The degree of non-coplanarity between the plane in which the first port 11 is located and the plane in which the second port of the second hydraulic component 20 is located is determined.

The plurality described above is at least two as long as the first valve block 31 and the regulating valve block 34 can be adjusted, between the regulating valve block 34 and the intermediate valve block 33, the second valve block 32 and the intermediate valve block 33. The fit between them can be.

Moreover, when the third valve block is one (shown in FIG. 2), the above manner can also be utilized (example For example, a first large hole is opened in the first valve block, a first small hole is opened in the third valve block, and the first large hole and the first small hole are connected by a fastener, and the first valve block is opened on the second valve block. Two large holes, a second small hole is formed in the third valve block, and the second large hole and the second small hole are connected by a fastener) the first valve block 31 and the third valve block, the third valve block and the first valve block The relative rotation between the two valve blocks 32 can be achieved while maintaining mutual adhesion.

In order to further enhance the sealing effect, preferably between the first valve block 31 and the first port 11, and/or between the second valve block 32 and the second port 21, and/or the first valve block 31 and A seal ring 60 may be disposed between the three valve blocks, and/or between the second valve block 32 and the third valve block, and/or between the plurality of third valve blocks to prevent oil from the oil passages in the respective valve blocks. The junction is leaking out. The seal ring 60 may be a general type 0 seal made of a rubber material as long as the joint of the oil passages in the respective valve blocks can be sealed.

Preferably, as shown in Fig. 7, the connecting device 30 of the present invention may further include a shutoff valve 40 that communicates with the third valve block to control the opening and closing of the oil passage in the connecting device 30.

The shutoff valve 40 is not limited to being in communication with the third valve block, and the first valve block 31 may be in communication with or communicate with the second valve block 32 as long as the opening and closing of the oil passage in the control connecting device 30 can be realized.

As another aspect of the present invention, there is provided a hydraulic component group including a first hydraulic component 10 having a first port 11, a second hydraulic component 20 having a second port 21, and a communication assembly 30. The communication component 30 is the communication component 30 provided in the present invention, and the first valve block 31 of the communication component 30 communicates with the first oil port 10 of the first hydraulic component 10, and the second component of the communication component 30 The valve block 32 is in communication with the second port of the second hydraulic component 20.

With the communication assembly 30 of the present invention, a rigidly sealed connection between the first hydraulic component 10 and the second hydraulic component 20 can be formed. The first hydraulic component 10 may be a hydraulic component such as a valve block or a cylinder, and the second hydraulic component 20 may be a hydraulic component such as a valve block or a cylinder.

Generally, the first hydraulic component 10 and the second hydraulic component 20 are both cylinders. When the first hydraulic component 10 and the second hydraulic component 20 are both cylinders, the cylinder group can be used in a construction machine with a telescopic mechanism for controlling and driving the extension and retraction of the telescopic mechanism, such as a concrete pump truck, Car The legs of engineering vehicles such as cranes and all-terrain cranes.

Since the concrete bodies such as concrete pump trucks, truck-mounted cranes and all-terrain cranes are subjected to large loads and the tipping moment is large, the work stability must be guaranteed. Therefore, the function of the legs is to stably support the whole vehicle on the ground and directly bear the load torque and weight of the whole vehicle. Construction vehicles with outriggers must first open the outriggers during operation so that the vehicle body can be stably supported on a flat surface before starting work to ensure the stability of the vehicle and avoid tilting of the vehicle body.

The unfolding and retracting of the legs is generally controlled and driven by the common cylinder, so the length of the common cylinder will be larger and the installation distance will be longer, but the telescopic stroke is shorter, which is not suitable for the installation of the legs with a large span. The structure of the legs is complicated and the structure is not compact. The hydraulic component group of the present invention makes the leg structure of the construction machine more compact by replacing two cylinders in series to replace the longer common cylinder. Moreover, the use of the connecting device 30 of the present invention ensures the sealing performance of the two cylinders when connected, and no oil leakage occurs during operation.

In one aspect of the invention, there is also provided a construction machine comprising the above-described hydraulic component group provided by the present invention.

For example, the construction machine can be a concrete pump truck. The hydraulic component group is a pumping cylinder group connected by a connecting device 30. The pumping cylinder group is used to drive the concrete piston to reciprocate, so as to push the concrete or suck the concrete into the concrete cylinder, and combine the action of the distribution valve to complete the concrete transportation.

The connecting device has three faces perpendicular to each other, so that the deflection of the surface of the at least three valve blocks that is in contact with the second hydraulic component can be converted into at least three valve blocks by the adjustment of the valve block and the first The surface of the hydraulic component that is fitted to the surface rotates around its normal line, thereby ensuring a close fit between the various valve blocks of the connecting device, and ensuring the tightness of the valve block of the connecting device with the first hydraulic component and the second hydraulic component. Fit to prevent oil leakage. Moreover, the connection between the connecting devices according to the present invention is a rigid connection, and the installation space has less restrictions on the connecting device. The hydraulic component groups connected by the connecting device according to the invention have a reliable hydraulic rigid connection, and oil leakage does not occur during operation. It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request

A connecting device (30) for a hydraulic component, the connecting device (30) for connecting a first hydraulic component (10) having a first port (11) and a second having a second port (21) a hydraulic component (20), characterized in that said connecting means (30) comprises at least three valve blocks communicating between said first port (11) and said second port (21), said at least Two of the three valve blocks are respectively engaged with the first oil port (11) and the second oil port (12), and any two adjacent valve blocks of the at least three valve blocks are attached a combined surface, the at least three valve blocks and the first port

(11) The surface to be fitted and the surface of the at least three valve blocks which are in contact with the second port (21) have three surfaces which are perpendicular to each other.

2. The connecting device (30) according to claim 1, wherein said at least three valve blocks comprise a first valve block (31) in communication with said first port (11), Second port

(21) a second valve block (32) that is in communication, and a third valve block that communicates with the first valve block (31) and the second valve block (32).

The connecting device (30) according to claim 2, wherein the third valve block is plural.

4. The connecting device (30) according to claim 3, wherein the third valve block comprises an intermediate valve block (33) and an adjustment valve block (34), the intermediate valve block (33) and the The second valve block (32) is in conformity, the adjustment valve block (34) is in communication between the first valve block (31) and the intermediate valve block (33), and the adjustment valve block ( 34) The upper two adjacent surfaces are respectively fitted to the first valve block (31) and the intermediate valve block (33).

The connecting device (30) according to claim 4, wherein the first valve Between block (31) and trim valve block (34), and/or between said trim valve block (34) and said intermediate valve block (33), and/or said second valve block (32) The intermediate valve blocks (33) are relatively movable between them in a state of being brought into close contact.

The connecting device (30) according to claim 5, characterized in that the connecting device (30) further comprises a first fastener (30a), the first valve block (31) and the adjustment a first small hole (lla) is formed in one of the valve blocks (34), and the adjustment valve block (34) and the other one of the first valve blocks (31) are formed with the first a small hole (11a) coaxially and one-to-one corresponding first large hole (31a), an aperture of the first large hole (31a) being smaller than an aperture of the first small hole (11a) and the first fastening The diameter of the piece (30a) is 0.5 to 2 mm, and the first fastener (30a) is closely fitted with the first small hole (11a) through the first large hole (31a) to A valve block (31) is coupled to the adjustment valve block (34).

The connecting device (30) according to claim 5, characterized in that the connecting device (30) further comprises a plurality of second fasteners, the adjusting block (34) and the intermediate block (33) Forming a plurality of second small holes on one of the intermediate valve blocks (33) and the other of the adjustment valve blocks (34) coaxial with the plurality of second small holes And a plurality of second large holes corresponding to the ones, wherein the second large holes have an aperture larger than the diameter of the second small holes and the diameter of the second fastener by 0.5 to 2 mm, the second fastener The second orifice is mated with the second orifice to connect the intermediate valve block (33) to the adjustment valve block (34).

8. The connecting device (30) according to claim 5, wherein the connecting device (30) further comprises a plurality of third fasteners, the second valve block (22) and the intermediate valve block a plurality of third small holes are formed in one of (33), and the other of the intermediate valve block (33) and the second valve block (32) are formed with the plurality of third a plurality of third large holes coaxially and one-to-one corresponding to the holes, the aperture of the third large holes being smaller than the diameter of the third small holes and the diameter of the third fastener Larger 0.5 to 2 mm, the third fastener is tightly fitted with the third small hole through the third large hole to connect the second valve block (32) with the intermediate valve block (33) Connected.

9. The connecting device (30) according to claim 1, wherein the valve block is between the first port (11), and/or the valve block and the second port A seal ring (60) is disposed between (21) and/or adjacent two of the valve blocks.

10. The connecting device (30) according to claim 1, wherein the connecting device (30) further comprises a shutoff valve (40), the shutoff valve (40) being in communication with one of the valve blocks, To control the on and off of the oil passage in the connecting device (30).

11. A hydraulic component set comprising a first hydraulic component (10) having a first port (11), a second hydraulic component (20) having a second port (21), and a communication component (30), characterized in that the communication component (30) is the communication component (30) according to any one of claims 1 to 10, in the at least three valve blocks of the communication component (30) Two valve blocks are respectively in communication with the first port (10) of the first hydraulic component (10) and the second port (21) of the second hydraulic component (20).

12. The hydraulic component set according to claim 11, wherein:

The component (10) and the second hydraulic component (20) are both cylinders.

13. A construction machine, characterized in that the construction machine comprises the hydraulic component group according to claim 11 or 12.