Cylinder valve integrated hydraulic cylinder and concrete pump truck

Abstract

The invention discloses a cylinder valve integrated hydraulic cylinder and a concrete pump truck. The cylinder valve integrated hydraulic cylinder comprises a cylinder barrel, a cylinder bottom, a piston rod and a piston. A guide sleeve is mounted on the axial surface of the other side of the cylinder barrel; the piston rod penetrates through the guide sleeve and then is inserted into the cylinder barrel, and the piston rod can axially and linearly move in the cylinder barrel; the piston sleeves the end, close to the cylinder bottom, of the piston rod; the piston rod is provided with a radially arranged valve hole at the part outside the cylinder barrel, the piston rod is provided with a rodless cavity oil way and a rod cavity oil way which are communicated with the valve hole and then extend inwards to the axial end face of the piston rod, the tail end of the rod cavity oil way is provided with an oil plug structure, and the tail end of the rodless cavity oil way is provided with a threaded hole; a radial oil hole communicated with a rod cavity oil way is formed in the position, close to the piston, of the piston rod, the piston rod at the radial oil hole is sleeved with a spacer bush, and an oil passing hole is formed in the spacer bush. Due to the fact that the built-in mode is adopted, the external space is saved, the possibility that the valve is collided by the external environment is avoided, welding is omitted, and the using safety and reliability of the oil cylinder are improved.

Description

Technical Field

[0001] The invention relates to a cylinder valve integrated hydraulic cylinder, belonging to the technical field of hydraulic cylinders for pump trucks. Background Art

[0002] The hydraulic cylinder of a pump truck is one of the common driving components of hydraulic equipment, which will affect the working quality of the main engine. In the conventional ball head flange structure, the oil pipe and valve lock accessories are exposed outside the oil cylinder, which is easy to be damaged and cause safety accidents. In addition, this structure requires the valve seat, oil pipe and oil cylinder to be welded together. Improper handling of the welding parts is also prone to oil leakage. The use of a cylinder valve integrated structure can avoid similar problems. Summary of the invention

[0003] The present invention provides a cylinder valve integrated hydraulic cylinder, which adopts a built-in manner, saves external space, avoids the possibility of external environment colliding with the valve, saves welding, and improves the safety and reliability of the cylinder.

[0004] The present invention is implemented according to the following technical solutions: In a first aspect, the present invention provides a cylinder valve integrated hydraulic cylinder, comprising: A cylinder barrel and a cylinder bottom, wherein the cylinder bottom is fixed on one side axial surface of the cylinder barrel, and a guide sleeve is installed on the other side axial surface of the cylinder barrel; A piston rod, which passes through the guide sleeve and is inserted into the cylinder, and the piston rod can perform axial linear repetitive motion in the cylinder; A piston, which is mounted on the end of the piston rod near the bottom of the cylinder and can move with the piston rod; The piston rod is provided with a radially arranged valve hole at a portion outside the cylinder barrel, the piston rod is provided with a rodless chamber oil circuit and a rod chamber oil circuit which are connected with the valve hole and extend inward to the axial end surface of the piston rod, an oil plugging structure is provided at the end of the rod chamber oil circuit, and a threaded hole is provided at the end of the rodless chamber oil circuit; The piston rod is provided with a radial oil hole communicated with the rod chamber oil path at a position close to the piston, and a spacer sleeve is sleeved on the piston rod at the radial oil hole, and the spacer sleeve is provided with an oil hole.

[0005] In some implementations, the oil plug structure is a threaded plug, the end of the rod chamber oil circuit is provided with an internal thread, the threaded plug is screwed into the internal thread and tightened, and the threaded plug is welded to the piston rod.

[0006] In some implementations, a space of 8 mm to 9 mm is left between the outer end face of the threaded plug and the end face of the piston rod, and the space is sealed by welding.

[0007] In some implementations, a threaded oil port is provided at the lower portion of the valve hole, and an inclined hole connected to the rodless chamber oil circuit is drilled in the threaded oil port.

[0008] In some implementations, two oil holes are symmetrically arranged on the spacer.

[0009] In some implementations, the spacer is provided with two oil holes that are symmetrically arranged at 180°.

[0010] In some implementations, the radial oil hole is perpendicular to the rod chamber oil circuit, a threaded oil port is provided at the upper end of the radial oil hole, and a countersunk surface is provided at the upper end of the threaded oil port.

[0011] In some implementations, the rodless chamber oil passage and the rod chamber oil passage are arranged in parallel to the center line of the piston rod.

[0012] In some implementations, the cylinder barrel and the guide sleeve are fixed by a threaded connection, and the piston and the piston rod are fixed by a threaded connection.

[0013] In a second aspect, the present invention provides a concrete pump truck equipped with the above-mentioned cylinder valve integrated hydraulic cylinder.

[0014] Beneficial effects of the present invention: 1. The oil circuit and valve of this structure are built-in, which saves external space.

[0015] 2. It avoids the possibility of collision between valves and pipelines caused by external environment, thus improving safety.

[0016] 3. It saves the pipe welding and avoids the problem of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0018] In the attached picture: Figure 1 It is an overall cross-sectional view of the cylinder valve integrated hydraulic cylinder of the present invention; Figure 2 It is a schematic diagram of the oil plug structure of the present invention.

[0019] Illustrations: cylinder bottom 1, piston 2, spacer sleeve 3, cylinder barrel 4, piston rod 5, guide sleeve 6, oil hole 31, inclined hole 51, rodless chamber oil circuit 52, rod chamber oil circuit 53, valve hole 54, oil plug structure 55, threaded hole 56, threaded oil port 57, radial oil hole 58, threaded oil port 59, countersunk surface 510, internal thread 551, threaded plug 552, welding space 553.

[0020] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 As shown, a cylinder valve integrated hydraulic cylinder comprises a cylinder bottom 1, a piston 2, a spacer sleeve 3, a cylinder barrel 4, a piston rod 5, and a guide sleeve 6; the cylinder bottom 1 is fixed on one side axial surface of the cylinder barrel 4, and a guide sleeve 6 is installed on the other side axial surface of the cylinder barrel 4; the piston rod 5 passes through the guide sleeve 6 and is inserted into the cylinder barrel 4, and the piston rod 5 can perform axial linear repetitive motion in the cylinder barrel 4; the piston 2 is sleeved on the end of the piston rod 5 close to the cylinder bottom 1 and can move with the piston rod 5; the piston rod 5 is located outside the cylinder barrel 4. A radially arranged valve hole 54 is provided at the position, the piston rod 5 is provided with a rodless chamber oil circuit 52 and a rod chamber oil circuit 53 which are connected with the valve hole 54 and extend inward to the axial end face of the piston rod 5, an oil plugging structure 55 is provided at the end of the rod chamber oil circuit 53, and a threaded hole 56 is provided at the end of the rodless chamber oil circuit 52; the piston rod 5 is provided with a radial oil hole 58 connected with the rod chamber oil circuit 53 at a position close to the piston 2, a spacer sleeve 3 is mounted on the piston rod 5 at the radial oil hole 58, and an oil through hole 31 is provided on the spacer sleeve 3.

[0025] The above-mentioned oil plug structure is further described below.

[0026] like Figure 2As shown, the oil plug structure 55 is a threaded plug 552 , and an internal thread 551 is provided at the end of the rod chamber oil passage 53 . The threaded plug 552 is screwed into the internal thread 551 and tightened, and the threaded plug 552 is welded to the piston rod 5 .

[0027] For further solutions, please refer to Figure 2 As shown, a welding space 553 of 8 mm to 9 mm is reserved between the outer end face of the threaded plug 552 and the end face of the piston rod 5, and welding is performed in the welding space 553 to ensure its sealing.

[0028] For further solutions, please refer to Figure 1 As shown, a threaded oil port 57 is provided at the lower portion of the valve hole 54 , and an inclined hole 51 connected to the rodless chamber oil circuit 52 is drilled in the threaded oil port 57 .

[0029] For further solutions, please refer to Figure 1 As shown, two oil holes 31 are symmetrically arranged on the spacer 3, and the two oil holes 31 are symmetrically arranged at 180 degrees.

[0030] For further solutions, please refer to Figure 1 As shown, the radial oil hole 58 is perpendicular to the rod chamber oil circuit 53 , a threaded oil port 59 is provided at the upper end of the radial oil hole 58 , and a countersunk surface 510 is provided at the upper end of the threaded oil port 59 .

[0031] For further solutions, please refer to Figure 1 As shown, the rodless chamber oil passage 52 and the rod chamber oil passage 53 are arranged in parallel to the center line of the piston rod 5 .

[0032] For further solutions, please refer to Figure 1 As shown, the cylinder 4 and the guide sleeve 6 are fixed by threaded connection, and the piston 2 and the piston rod 5 are fixed by threaded connection.

[0033] In summary, the purpose of the present invention is to provide a cylinder valve integrated hydraulic cylinder, in which a plug-in valve hole structure is provided at the earring end of the piston rod, and two parallel elongated oil passages are provided inside the rod body to connect the inside of the oil cylinder with the valve hole. One oil passage leads to the rod chamber of the oil cylinder, and the other leads to the rodless chamber of the oil cylinder. The oil circuit and valve of this structure are built-in, which saves external space, avoids the possibility of collision of the valve by the external environment, saves welding, and improves the safety and reliability of the use of the oil cylinder.

[0034] The concrete pump truck provided by the present invention is described below. The concrete pump truck described below and the cylinder valve integrated hydraulic cylinder described above can be referred to each other.

[0035] A concrete pump truck provided by the present invention may include a cylinder valve integrated hydraulic cylinder as described in any one of the above embodiments.

[0036] The beneficial effects achieved by the concrete pump truck provided by the present invention are consistent with the beneficial effects achieved by the cylinder valve integrated hydraulic cylinder provided by the present invention, and will not be described in detail here.

[0037] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0038] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0039] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A cylinder valve integrated hydraulic cylinder, characterized in that: include: A cylinder barrel and a cylinder bottom, wherein the cylinder bottom is fixed on one side axial surface of the cylinder barrel, and a guide sleeve is installed on the other side axial surface of the cylinder barrel; A piston rod, which passes through the guide sleeve and is inserted into the cylinder, and the piston rod can perform axial linear repetitive motion in the cylinder; A piston, which is mounted on the end of the piston rod near the bottom of the cylinder and can move with the piston rod; The piston rod is provided with a radially arranged valve hole at a portion outside the cylinder barrel, the piston rod is provided with a rodless chamber oil circuit and a rod chamber oil circuit which are connected with the valve hole and extend inward to the axial end surface of the piston rod, an oil plugging structure is provided at the end of the rod chamber oil circuit, and a threaded hole is provided at the end of the rodless chamber oil circuit; The piston rod is provided with a radial oil hole communicated with the rod chamber oil path at a position close to the piston, and a spacer sleeve is sleeved on the piston rod at the radial oil hole, and the spacer sleeve is provided with an oil hole.

2. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: The oil plug structure is a threaded plug, and the end of the rod chamber oil circuit is provided with an internal thread. The threaded plug is screwed into the internal thread and tightened, and the threaded plug is welded to the piston rod.

3. The cylinder valve integrated hydraulic cylinder according to claim 2, characterized in that: There is a space of 8mm to 9mm between the outer end face of the threaded plug and the end face of the piston rod, and the space is sealed by welding.

4. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: A threaded oil port is provided at the lower part of the valve hole, and an inclined hole connected with the rodless chamber oil circuit is drilled in the threaded oil port.

5. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: Two oil holes are symmetrically arranged on the spacer.

6. The cylinder valve integrated hydraulic cylinder according to claim 5, characterized in that: The spacer is provided with two oil holes which are symmetrically arranged at 180 degrees.

7. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: The radial oil hole is perpendicular to the rod chamber oil circuit, a threaded oil port is arranged at the upper end of the radial oil hole, and a countersunk surface is arranged at the upper end of the threaded oil port.

8. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: The rodless chamber oil circuit and the rod chamber oil circuit are arranged in parallel to the center line of the piston rod.

9. The cylinder valve integrated hydraulic cylinder according to claim 1, characterized in that: The cylinder barrel and the guide sleeve are fixed by threaded connection, and the piston and the piston rod are fixed by threaded connection.

10. A concrete pump truck, characterized in that: A cylinder valve integrated hydraulic cylinder is installed with the cylinder valve according to any one of claims 1 to 9.

Images