Novel piston rod of hydraulic cylinder

Abstract

The novel piston rod of the hydraulic cylinder comprises a piston rod body matched with a cylinder body of the hydraulic cylinder, a hydraulic damper is fixedly arranged at the end, located outside the cylinder body, of the piston rod body, and a connecting lug ring is fixedly arranged on a telescopic rod of the hydraulic damper. A telescopic rod of the hydraulic damper and the end, located outside the cylinder body, of the piston rod body are jointly sleeved with a buffering sleeve, one end of the buffering sleeve is fixedly connected with the peripheral wall of the telescopic rod of the hydraulic damper, and the other end of the buffering sleeve is of an opening structure. And a buffer spring is arranged on the peripheral wall of the hydraulic damper in the buffer sleeve in a sleeving manner. A telescopic corrugated protective cover is arranged at the position, located between the cylinder body and the buffering sleeve, of the piston rod body in a sleeving mode. The hydraulic cylinder can prevent the piston rod from deforming instantly during working, and the service life of the piston rod and the service life of the whole hydraulic cylinder can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder accessories technology, and in particular to a novel piston rod for hydraulic cylinders. Background Technology

[0002] Hydraulic cylinders, as important power actuators, are widely used in engineering machinery, metallurgical equipment, aerospace, and other fields. A hydraulic cylinder mainly consists of a cylinder barrel, piston rod, piston, and end caps. The piston rod is the connecting component that supports the piston's work, and its performance directly affects the reliability, service life, and working efficiency of the hydraulic cylinder. Because hydraulic cylinders are frequently subjected to instantaneous forces, which are transmitted through the piston rod to the object driven by the cylinder, and currently the piston rod of a hydraulic cylinder is rigidly connected to the connected object, frequent high-intensity stress can cause extrusion deformation of the piston rod, affecting the service life of both the piston rod and the hydraulic cylinder. Therefore, a new type of piston rod for hydraulic cylinders needs to be developed. Utility Model Content

[0003] The purpose of this invention is to provide a novel piston rod for hydraulic cylinders, thereby solving the technical problems mentioned in the background section.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a novel piston rod for a hydraulic cylinder, comprising a piston rod body adapted to the cylinder body of the hydraulic cylinder. A hydraulic damper is fixedly mounted on one end of the piston rod body located outside the cylinder body, and a connecting lug is fixedly mounted on the telescopic rod of the hydraulic damper. A buffer sleeve is sleeved together on the telescopic rod of the hydraulic damper and the end of the piston rod body located outside the cylinder body. One end of the buffer sleeve is fixedly connected to the outer peripheral wall of the telescopic rod of the hydraulic damper, and the other end is an open structure. A buffer spring is sleeved inside the buffer sleeve on the outer peripheral wall of the hydraulic damper.

[0006] Furthermore, the piston rod is fitted with a retractable corrugated protective cover at the position between the cylinder and the buffer sleeve, and the two ends of the corrugated protective cover are fixedly connected to the cylinder and the buffer sleeve, respectively.

[0007] Furthermore, a first connecting flange is fixedly provided on the outer peripheral wall of the end of the cylinder body, a second connecting flange is fixedly provided on the outer peripheral wall of the buffer sleeve, and connecting discs are fixedly provided at both ends of the corrugated protective cover. The two connecting discs are respectively fixedly connected to the first connecting flange and the second connecting flange by a plurality of connecting bolts evenly arranged along their circumference.

[0008] Furthermore, an installation ring groove is provided on the inner peripheral wall of the connecting earring, a bearing is provided inside the installation ring groove, and a bushing is fixedly provided on the inner peripheral wall of the bearing.

[0009] Furthermore, a first support boss is fixedly provided on the outer peripheral wall of the piston rod at one end outside the cylinder body, and a second support boss is fixedly provided on the inner peripheral wall of the buffer sleeve, with the buffer spring disposed between the first support boss and the second support boss.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] In this invention, the piston rod and connecting lug are connected by a hydraulic damper, and the hydraulic damper and piston rod are buffered by a buffer sleeve and a buffer spring. When the hydraulic cylinder generates an instantaneous force, it acts on the driven object through the piston rod and connecting lug. The buffer spring inside the buffer sleeve deforms to absorb the impact force and vibration energy, reducing the instantaneous impact on the piston rod. The hydraulic damper further absorbs the vibration and impact energy, ensuring smooth movement of the entire piston rod. Therefore, this invention prevents the piston rod from undergoing instantaneous deformation during operation, thus improving the service life of the piston rod and the entire hydraulic cylinder. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the buffer sleeve connection of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-section of the connecting earring of this utility model;

[0016] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 2. Piston rod body; 3. Hydraulic damper; 4. Connecting lug; 5. Buffer sleeve; 6. Buffer spring; 7. First support boss; 8. Second support boss; 9. Corrugated protective cover; 10. First connecting flange; 11. Second connecting flange; 12. Connecting disc; 13. Connecting bolt; 14. Mounting ring groove; 15. Bearing; 16. Bushing. Detailed Implementation

[0017] like Figures 1-3As shown, a novel piston rod for a hydraulic cylinder includes a piston rod body 2 adapted to the cylinder body 1 of the hydraulic cylinder. A hydraulic damper 3 is fixedly installed at one end of the piston rod body 2 located outside the cylinder body 1. A connecting lug 4 is fixedly connected to the free end of the telescopic rod of the hydraulic damper 3.

[0018] A buffer sleeve 5 is fitted around the telescopic rod of the hydraulic damper 3 and the piston rod 2 located outside the cylinder body. One end of the buffer sleeve 5 is fixedly connected to the outer peripheral wall of the telescopic rod of the hydraulic damper 3, and the other end is open. A buffer spring 6 is fitted inside the buffer sleeve 5 onto the outer peripheral wall of the hydraulic damper 3. In this embodiment, a first support boss 7 is fixedly provided at the outer peripheral wall of the piston rod 2 located outside the cylinder body 1, and a second support boss 8 is fixedly provided on the inner peripheral wall of the buffer sleeve 5. The buffer spring 6 is located between the first support boss 7 and the second support boss 8.

[0019] In this invention, the piston rod and connecting lug are connected by a hydraulic damper, and the hydraulic damper and piston rod are buffered by a buffer sleeve and a buffer spring. When the hydraulic cylinder generates an instantaneous force, it acts on the driven object through the piston rod and connecting lug. The buffer spring inside the buffer sleeve deforms to absorb the impact force and vibration energy, reducing the instantaneous impact on the piston rod. The hydraulic damper further absorbs the vibration and impact energy, ensuring smooth movement of the entire piston rod. Therefore, this invention prevents the piston rod from undergoing instantaneous deformation during operation, thus improving the service life of the piston rod and the entire hydraulic cylinder.

[0020] A retractable corrugated protective cover 9 is fitted onto the piston rod 2 at the portion located between the cylinder body 1 and the buffer sleeve 5. The two ends of the corrugated protective cover 9 are fixedly connected to the cylinder body 1 and the buffer sleeve 5, respectively. Specifically, a first connecting flange 10 is fixedly provided on the outer peripheral wall of the end of the cylinder body 1, and a second connecting flange 11 is fixedly provided on the outer peripheral wall of the buffer sleeve 5. Connecting discs 12 are fixedly provided at both ends of the corrugated protective cover 9. The two connecting discs 12 are fixedly connected to the first connecting flange 10 and the second connecting flange 11 by multiple connecting bolts 13 evenly arranged along their circumference. This invention, by fitting a retractable corrugated protective cover onto the outside of the piston rod, can prevent the accumulation of external dust at the exposed part of the piston rod, thereby ensuring the performance of the hydraulic cylinder.

[0021] In addition, in this embodiment, a mounting groove 14 is formed on the inner peripheral wall of the connecting earring 4, and a bearing 15 is installed inside the mounting groove 14. A bushing 16 is fixedly provided on the inner peripheral wall of the bearing 15. By installing the bearing and bushing inside the connecting earring, friction and stress concentration between it and the connected object can be reduced.

[0022] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A new type of piston rod for hydraulic cylinders, characterized in that: The device includes a piston rod adapted to the cylinder body of a hydraulic cylinder. A hydraulic damper is fixedly mounted on one end of the piston rod outside the cylinder body, and a connecting lug is fixedly mounted on the telescopic rod of the hydraulic damper. A buffer sleeve is fitted together on the telescopic rod of the hydraulic damper and the end of the piston rod outside the cylinder body. One end of the buffer sleeve is fixedly connected to the outer peripheral wall of the telescopic rod of the hydraulic damper, and the other end is open. A buffer spring is fitted inside the buffer sleeve on the outer peripheral wall of the hydraulic damper.

2. The new style of hydraulic cylinder piston rod of claim 1, wherein: The piston rod is fitted with a retractable corrugated protective cover at the position between the cylinder and the buffer sleeve, and the two ends of the corrugated protective cover are fixedly connected to the cylinder and the buffer sleeve, respectively.

3. The new style piston rod for hydraulic cylinders of claim 2, wherein: A first connecting flange is fixedly provided on the outer peripheral wall of the end of the cylinder body, and a second connecting flange is fixedly provided on the outer peripheral wall of the buffer sleeve. Connecting discs are fixedly provided at both ends of the corrugated protective cover. The two connecting discs are fixedly connected to the first connecting flange and the second connecting flange by a plurality of connecting bolts evenly arranged along their circumference.

4. The new style hydraulic cylinder piston rod of claim 1, wherein: The inner peripheral wall of the connecting earring is provided with a mounting ring groove, the inside of the mounting ring groove is provided with a bearing, and a bushing is fixedly provided on the inner peripheral wall of the bearing.

5. The new style hydraulic cylinder piston rod of claim 1, wherein: A first support boss is fixedly provided on the outer peripheral wall of the piston rod at one end outside the cylinder body, and a second support boss is fixedly provided on the inner peripheral wall of the buffer sleeve. The buffer spring is disposed between the first support boss and the second support boss.

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