CN213017045U

CN213017045U - Swing hydraulic cylinder with built-in oil way

Info

Publication number: CN213017045U
Application number: CN202021406261.0U
Authority: CN
Inventors: 许清; 施光林; 赵华; 张静; 周临震; 孟春明; 冯启阳; 王小娟; 许向华
Original assignee: Jiangsu Juwei Machinery Co ltd
Current assignee: Jiangsu Juwei Machinery Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-04-20
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a swing hydraulic cylinder with a built-in oil circuit, which comprises a cylinder body and a piston fixedly arranged on a piston rod, wherein the piston is arranged in a cylinder cavity of the cylinder body in a sliding manner, the cylinder body is provided with a plurality of cylinder oil holes, the cylinder oil holes are parallel to the cylinder cavity of the cylinder body and are arranged around the cylinder cavity of the cylinder body, and the lower end of each cylinder oil hole is communicated with the cylinder cavity of the cylinder body; and a cylinder body swing supporting structure is arranged on the outer side of the cylinder body. The cylinder body swing supporting structure comprises a cylinder body swing shaft and a swing frame pin shaft, the cylinder body is movably supported on a swing frame through the cylinder body swing shaft, and the swing frame is movably supported on a cylinder body swing seat through the swing frame pin shaft. The cylinder body pendulum shaft and the pendulum frame pin shaft are perpendicular to each other. The hydraulic cylinder is compact in structure and resistant to impact vibration, and can effectively compensate and eliminate radial motion component force between the pistons of the cylinder body, so that eccentric wear of the hydraulic cylinder is avoided.

Description

Swing hydraulic cylinder with built-in oil way

Technical Field

The utility model relates to a hydraulic pile hammer especially relates to hydraulic cylinder of hydraulic pile hammer.

Background

The hydraulic pile hammer has the characteristics of high pile driving efficiency, low noise, small vibration and no oil smoke pollution; the hammer core of the hydraulic pile hammer can reach dozens of tons, even nearly hundreds of tons; the striking energy is from hundreds of kilojoules to thousands of kilojoules, so the hydraulic pile hammer can realize the construction requirements of higher striking energy and higher striking frequency and can meet the construction requirements of large foundation piles. The hydraulic cylinder is a core component of the hydraulic pile hammer, and the performance of the hydraulic pile hammer directly determines the hitting energy and hitting frequency of the hydraulic pile hammer, and the reliability and stability of the working performance of the pile hammer.

With the development of large-scale construction engineering, the hydraulic pile hammer needs to have higher striking energy and frequency, and the hydraulic cylinder of the hydraulic pile hammer can bear more severe impact vibration and higher hydraulic oil flow and pressure. The existing hydraulic cylinder of the pile hammer is easy to leak under the condition of severe impact vibration because of more assembly parts and various external hydraulic oil inlet and return pipelines, and has the defects of poor structural rigidity, insufficient overall strength, large pressure loss and the like, so that the working stability and reliability of the hydraulic cylinder are difficult to ensure, and the striking speed and the striking energy of the pile hammer are difficult to improve; meanwhile, due to the fact that the number of the external oil-way pipelines is too large, winding and impact of an oil pipe can easily occur in frequent reciprocating striking of the pile hammer, and the striking operation failure rate is increased.

The violent impact vibration of the pile hammer can also cause serious adverse effects on the stable reciprocating motion of the hydraulic cylinder, in the vibration impact process, the pile hammer generates strong lateral (radial) destructive force on the piston and the piston rod, particularly, the lateral (radial) component force of the pile hammer is inevitable when the pile hammer performs inclined pile construction operation, the piston rod deflects to one side of the center of the cylinder body due to the lateral component force generated on the piston and the piston rod by the impact vibration of the pile hammer or the inclined pile operation, so that the piston of the hydraulic cylinder generates deflection abrasion on the cylinder barrel cavity, the piston rod and the cylinder body and a sealing element, and the deflection abrasion also can be increased sharply along with the improvement of the striking energy and the increase of the striking frequency of the pile hammer; long-time construction operation also can make pile hammer's operation precision decline, the movement clearance grow, these adverse factors inevitably lead to the appearance of pneumatic cylinder deviation wearing and tearing, and the eccentric wear phenomenon not only can arouse the continuous increase in piston and cylinder hole chamber clearance, makes piston both sides hydraulic pressure chamber pressure difference reduce, and the pile efficiency of hydraulic pile hammer drops, can arouse the damage of piston rod sealing member or even inefficacy moreover, causes hydraulic oil to leak outward for the frequency of beating of pile hammer seriously descends, even unable normal work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a built-in oil circuit pendulum props up pneumatic cylinder is provided, compact structure not only, and shock-resistant vibration can effectively compensate and eliminate the radial motion component between the cylinder body piston moreover, avoids the pneumatic cylinder eccentric wear.

In order to solve the technical problem, the swing hydraulic cylinder with the built-in oil circuit comprises a cylinder body and a piston fixedly arranged on a piston rod, wherein the piston is arranged in a cylinder cavity of the cylinder body in a sliding manner, the cylinder body is provided with a plurality of cylinder body oil holes, the cylinder body oil holes are parallel to the cylinder cavity of the cylinder body and are arranged around the cylinder cavity of the cylinder body, and the lower end of each cylinder body oil hole is communicated with the cylinder cavity of the cylinder body; and a cylinder body swing supporting structure is arranged on the outer side of the cylinder body.

In the structure, because the plurality of parallel cylinder body oil holes are arranged around the cylinder body cylinder cavity, and the lower ends of the cylinder body oil holes are communicated with the cylinder body cylinder cavity, the structure not only reduces the external pressure oil conveying pipelines of the hydraulic cylinder, avoids the impact and winding of an external oil pipe, but also greatly reduces the oil circuit connection points, and improves the working stability and reliability of the hydraulic cylinder; the cylinder body cavity and the cylinder body oil hole are arranged on the cylinder body, so that the hydraulic cylinder is more compact in structure, the overall rigidity and structural strength of the hydraulic cylinder are enhanced, and the hydraulic cylinder is more suitable for reliable operation in an impact vibration environment. The outer side of the cylinder body is provided with the cylinder body swing supporting structure, a follow-up hydraulic cylinder structure is formed, and good offset angle compensation capacity is formed, even if the movement direction of the pile hammer deviates from the central line of the hydraulic cylinder due to severe vibration, insufficient movement precision and the like, radial component force cannot be generated on the piston rod, so that the reciprocating movement direction of the piston rod and the movement direction of the pile hammer are always kept consistent, eccentric wear between the piston of the hydraulic cylinder and a cylinder cavity and between the piston rod and a cylinder body sealing piece is effectively avoided, normal operation of the hydraulic cylinder is guaranteed, pile driving efficiency of the hydraulic pile hammer is stabilized, operation faults of the hydraulic pile hammer are greatly reduced, and the service life of the hydraulic pile hammer is effectively prolonged.

This has and novel further embodiment, cylinder body swing supporting structure includes cylinder body balance staff and pendulum frame round pin axle, the cylinder body passes through cylinder body balance staff movable support on the swing frame, and this swing frame is then through pendulum frame round pin axle movable support on the cylinder body pendulum seat. The cylinder body pendulum shaft and the pendulum frame pin shaft are perpendicular to each other. A flexible cylinder body follow-up structure is formed, and eccentric wear between the cylinder body and the piston can be effectively compensated and eliminated.

The utility model discloses a preferred embodiment, cylinder body swing supporting structure is ball-type hinge structure or cross axle type universal joint. The angle compensation device has the advantages of compact and reasonable structure, reliable operation and strong angle compensation capability.

The utility model discloses a further embodiment, the piston rod both ends are respectively through the both ends that lower uide bushing and last uide bushing stretch out the cylinder body. The upper guide sleeve is installed at one end of the cylinder body through the upper end cover of the cylinder body, and the lower guide sleeve is installed at the other end of the cylinder body through the lower end cover of the cylinder body. The structure forms a double-rod hydraulic cylinder, and is more beneficial to realizing large-flow and high-frequency work of the pile hammer.

The utility model discloses preferred embodiment, be provided with the oilhole that accesss to cylinder body section of thick bamboo chamber and/or cylinder body oilhole on the cylinder body upper end cover. Further reducing the pressure oil pipeline outside the cylinder body.

The utility model discloses a preferred embodiment, the lower extreme fixed mounting of piston rod has the hinge bulb. The lower end of the cylinder body oil hole is communicated with the cylinder body cylinder cavity through the corresponding cylinder body radial oil hole. 4-16 cylinder body oil holes (4) are wound on the periphery of the cylinder cavity of the cylinder body. The eccentric wear can be further eliminated, and an external oil pipeline is avoided.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a perspective view of one embodiment of the swing support hydraulic cylinder with built-in oil passages of the present invention;

FIG. 2 is a schematic structural view of a cross section A-A of the embodiment shown in FIG. 1;

FIG. 3 is a schematic structural view of a cross section B-B of the embodiment shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of the cylinder block of the hydraulic cylinder of the embodiment of FIG. 1;

fig. 5 is a schematic top view of the structure of fig. 4.

In the figure, 1-piston rod, 2-lower guide sleeve, 3-cylinder body, 4-cylinder body oil hole, 5-cylinder body barrel cavity, 6-swinging frame, 7-swinging frame pin shaft, 8-cylinder body swinging seat, 9-cylinder body upper end cover, 10-upper guide sleeve, 11-piston, 12-cylinder body radial oil hole, 13-cylinder body lower end cover, 14-hinged ball head, 15-cylinder body swinging shaft, 16-cylinder body swinging seat, 17-swinging shaft hole and 18-cylinder cover connecting hole.

Detailed Description

The swing hydraulic cylinder with the built-in oil circuit shown in fig. 1 comprises a cylinder body 3 and a piston rod 1 which penetrates through the cylinder body 3 and extends out of two ends of the cylinder body 3, wherein the upper end and the lower end of the cylinder body 3 are respectively and fixedly connected with a cylinder body upper end cover 9 and a cylinder body lower end cover 13, the cylinder body upper end cover 9 adopts a valve block type structure, and an oil hole which is communicated with a cylinder body cylindrical cavity 5 and/or a cylinder body oil hole 4 and used for conveying hydraulic oil is arranged in a valve body of the cylinder body upper end cover. A hinged ball head 14 is fixedly arranged at the lower extending end of the piston rod 1, and the piston rod 1 is hinged with the pile hammer through the hinged ball head 14. A cylinder swing support structure including a swing frame 6 and a cylinder swing base 8 is provided outside the waist portion of the cylinder 3, and the cylinder 3 is supported by the cylinder swing base 8 through the swing support structure.

As shown in fig. 2 and 3, the cylinder 3 is cylindrical, a cylinder bore 5 is formed at a center line of the cylinder 3 to extend through the cylinder in the longitudinal direction, and the cylinder 3 is further provided with cylinder oil holes 4, the cylinder oil holes 4 being parallel to the cylinder bore 5. A piston 11 is arranged in the cylinder cavity 5 in a sliding mode, the piston 11 is fixedly arranged on the piston rod 1, and the piston 11 and the piston rod 1 can be of an integral structure. The upper end of the cylinder body 3 is fixedly connected with a cylinder body upper end cover 9 through a connecting bolt, and an upper guide sleeve 10 is fixedly arranged on the cylinder body upper end cover 9 of the valve block type structure; the lower end of the cylinder body 3 is fixedly provided with a lower guide sleeve 2 through a cylinder body lower end cover 13, and the upper guide sleeve 10 and the lower guide sleeve 2 play roles of sliding guide and sealing of the piston rod 1. Two ends of the piston rod 1 respectively penetrate through the upper guide sleeve 10 and the lower guide sleeve 2 and extend out of the upper end and the lower end of the cylinder body 3, and a hinged ball head 14 is fixedly mounted at the end part of the lower extending end of the piston rod 1.

The outer side of the waist of the cylinder body 3 is provided with a cylinder body swing supporting structure, the cylinder body swing supporting structure comprises a cylinder body swing shaft 15 and a swing frame pin shaft 7, the cylinder body swing shaft 15 is two short shafts symmetrically positioned at two sides of the cylinder body 3, the swing frame pin shaft 7 is also two short shafts symmetrically positioned at two sides of the cylinder body 3, and the cylinder body swing shaft 15 and the swing frame pin shaft 7 are positioned on two planes which are perpendicular to each other. The cylinder body 3 is movably supported on the swinging frame 6 through a cylinder body swinging shaft 15, one end of the cylinder body swinging shaft 15 is inserted in a swinging shaft hole 17 on the cylinder body 3, and the other end is inserted on the swinging frame 6, so that the cylinder body 3 can swing around the cylinder body swinging shaft 15. The swing frame 6 is movably supported on the cylinder body swing seat 8 through a swing frame pin shaft 7, one end of the swing frame pin shaft 7 is inserted on the swing frame 6, and the other end of the swing frame pin shaft 7 is supported on the cylinder body swing seat 8, so that the swing frame 6 can swing around the swing frame pin shaft 7.

As shown in fig. 4 and 5, the cylinder body 3 is an integral forged piece, an end cover connecting flange is arranged at the upper end of the cylinder body, a plurality of cylinder cover connecting holes 18 are arranged on the connecting flange, a swing shaft hole convex ring is arranged at the outer side of the waist of the cylinder body 3, and two swing shaft holes 17 symmetrically positioned at two sides of the cylinder body are arranged on the swing shaft hole convex ring. A cylinder body cylindrical cavity 5 which is vertically communicated is arranged at the central line position of the cylinder body 3, 8 cylinder body oil holes 4 are also arranged on the cylinder body 3, and the circle of the cylinder body oil holes 4 is concentric with the cylinder body cylindrical cavity 5. The cylinder body oil hole 4 is parallel to the cylinder body cylinder cavity 5, the upper end opening of the cylinder body oil hole 4 is an opening end, the lower end of the cylinder body oil hole 4 is communicated with the cylinder body cylinder cavity 5 through the corresponding cylinder body radial oil hole 12, and hydraulic oil can enter the lower cylinder cavity of the cylinder body cylinder cavity 5 through the cylinder body oil hole 4 and the cylinder body radial oil hole 12 during operation.

The above mentioned is a preferred embodiment of the present invention, but the present invention is not limited to this, and the present invention has many improvements and changes, such as the above mentioned cylinder swing support structure can also adopt a ball hinge structure, or a cross axle type universal joint structure, and other commonly used movable hinge support structures; the hydraulic cylinder structure can be a double-rod hydraulic cylinder or a single-rod hydraulic cylinder; the number of the cylinder oil holes 4 on the cylinder 3 is not limited to 8, and the number thereof can be selected according to the actual working condition, but is preferably 4-16. And so on. These variations and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a built-in oil circuit pendulum props up pneumatic cylinder, includes cylinder body (3) to and fixed piston (11) that set up on piston rod (1), this piston (11) slide set up in cylinder body section of thick bamboo chamber (5) of cylinder body (3), its characterized in that: the cylinder body (3) is provided with a plurality of cylinder body oil holes (4), the cylinder body oil holes (4) are parallel to the cylinder body cylindrical cavity (5) and are arranged around the cylinder body cylindrical cavity (5), and the lower end of each cylinder body oil hole (4) is communicated with the cylinder body cylindrical cavity (5); and a cylinder body swinging supporting structure is arranged on the outer side of the cylinder body (3).

2. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: the cylinder body swing supporting structure comprises a cylinder body swing shaft (15) and a swing frame pin shaft (7), the cylinder body (3) is movably supported on a swing frame (6) through the cylinder body swing shaft (15), and the swing frame (6) is movably supported on a cylinder body swing seat (8) through the swing frame pin shaft (7).

3. The swing hydraulic cylinder with built-in oil passage according to claim 2, characterized in that: the cylinder body swing shaft (15) and the swing frame pin shaft (7) are perpendicular to each other.

4. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: the cylinder body swing supporting structure is a spherical hinge structure or a cross axle type universal joint.

5. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: two ends of the piston rod (1) respectively extend out of two ends of the cylinder body (3) through the lower guide sleeve (2) and the upper guide sleeve (10).

6. The swing hydraulic cylinder with built-in oil passage according to claim 5, characterized in that: the upper guide sleeve (10) is installed at one end of the cylinder body (3) through the upper end cover (9) of the cylinder body, and the lower guide sleeve (2) is installed at the other end of the cylinder body (3) through the lower end cover (13) of the cylinder body.

7. The swing hydraulic cylinder with built-in oil passage according to claim 6, characterized in that: and an oil hole leading to the cylinder cavity (5) of the cylinder body and/or the oil hole (4) of the cylinder body is formed in the upper end cover (9) of the cylinder body.

8. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: the lower end of the piston rod (1) is fixedly provided with a hinged ball head (14).

9. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: the lower end of the cylinder oil hole (4) is communicated with the cylinder cavity (5) of the cylinder body through a corresponding cylinder radial oil hole (12).

10. The swing hydraulic cylinder with built-in oil passage according to claim 1, characterized in that: 4-16 cylinder body oil holes (4) are wound on the periphery of the cylinder body cylinder cavity (5).