Impact resistant trunnion telescoping ram

Abstract

This utility model discloses an impact-resistant trunnion telescopic cylinder, including a cylinder barrel, a piston rod, and a buffer assembly. The piston rod is slidably mounted on one side of the cylinder barrel, and an eccentric sleeve is rotatably mounted on one side of the piston rod via a bearing. A connecting rod is fixed to one side of the eccentric sleeve. Trunnion assemblies are mounted on both the end of the connecting rod and one side of the tail of the cylinder barrel. A buffer assembly is installed between the connecting rod and the trunnion assembly. The buffer assembly includes an outer ring plate, an inner ring plate, and a buffer spring. By incorporating the buffer assembly, this utility model can quickly absorb pressure when the piston rod is subjected to a momentary impact, thus improving the impact resistance reliability of the cylinder.

Description

Technical Field

[0001] This utility model relates to the field of telescopic cylinder technology, specifically to an impact-resistant trunnion telescopic cylinder. Background Technology

[0002] Telescopic cylinders rely on hydraulic pressure to drive the load to achieve linear motion. They are the simplest and most widely used hydraulic actuators. Trunnion telescopic cylinders are telescopic cylinders with trunnions. Trunnions are usually installed at both ends of the hydraulic cylinder to fix the hydraulic cylinder. Trunnion telescopic cylinders are widely used in engineering machinery.

[0003] Patent 202220883645.4 discloses a tailgate hydraulic cylinder with good sealing and dust prevention effect. Cylinders similar to the above patent still have the following shortcomings: Although their sealing and dust prevention effect is better, the impact resistance of the cylinder when used in engineering machinery is a pain point in the industry. Ordinary cylinders have poor impact resistance and are easily damaged when subjected to high-frequency impact loads. Especially in harsh working conditions such as mining machinery and port equipment, cylinder failure often leads to the shutdown of the entire machine.

[0004] In view of this, we have studied and improved the existing structure and its shortcomings, and proposed an impact-resistant trunnion telescopic cylinder. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an impact-resistant trunnion telescopic cylinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an impact-resistant trunnion telescopic cylinder, comprising a cylinder barrel, a piston rod, and a buffer assembly. A piston rod is slidably disposed on one side of the cylinder barrel, and an eccentric sleeve is rotatably mounted on one side of the piston rod via a bearing. A connecting rod is fixed on one side of the eccentric sleeve. Trunnion assemblies are installed at the end of the connecting rod and on one side of the tail of the cylinder barrel. A buffer assembly is installed between the connecting rod and the trunnion assembly. The buffer assembly comprises an outer ring plate, an inner ring plate, and buffer springs. The outer ring plate and the inner ring plate are respectively located on both sides of the buffer assembly. Buffer springs are evenly distributed in an array on the side of the outer ring plate closest to the inner ring plate.

[0007] Furthermore, a sealing cap that fits tightly against the piston rod is inserted into one side of the cylinder barrel, and a rubber sealing ring that matches the piston rod is provided inside the sealing cap.

[0008] Furthermore, the trunnion assembly includes a bearing seat, reinforcing blocks, and a support ring. Reinforcing blocks are fixed on both sides of the bearing seat, and a support ring is fixed in the inner groove in the middle of the bearing seat.

[0009] Furthermore, the trunnion assembly also includes a rubber buffer ring and a wear-resistant layer. The inner side of the support ring is provided with a rubber buffer ring, and the inner side of the rubber buffer ring is fixed with a wear-resistant layer.

[0010] Furthermore, the buffer assembly also includes a damping rod, both the outer ring plate and the inner ring plate are ring-shaped structures, and the damping rod is provided inside the buffer spring.

[0011] Furthermore, the buffer assembly also includes a rubber airbag, with the other side of the buffer spring fixed to the rubber airbag, and the other side of the rubber airbag being fixedly connected to the inner ring plate.

[0012] Furthermore, two stress relief grooves are provided on the outer side of the tail of the cylinder barrel, and a flexible rubber ring is provided inside the stress relief groove. The thickness of the stress relief groove is 1 / 5 of the thickness of the cylinder barrel wall.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Equipped with a buffer assembly, the connecting rod is connected to the piston rod. The buffer spring between the outer ring plate and the inner ring plate on the outer side of the connecting rod can absorb vibration and play a role in buffering and depressurizing. The damping rod can play a role in damping vibration. The rubber air bladder on the other side of the buffer spring can quickly absorb vibration through the compressibility of the gas inside it, while suppressing the rebound of the buffer spring. Thus, the buffer assembly can quickly absorb pressure when the piston rod is subjected to instantaneous impact, improving the impact resistance reliability.

[0015] 2. It is equipped with trunnion assemblies. The two trunnion assemblies on both sides facilitate the installation of the connecting rod and the cylinder barrel. The bearing seat helps to strengthen its structural strength. The support ring in the inner groove of the bearing seat can bear radial force. The inner rubber buffer ring can absorb axial impact, making it suitable for strong vibration environments such as mining machinery and port equipment. The flexible rubber ring inside the stress relief groove can deform and absorb energy when the tail of the cylinder barrel is impacted, thus playing a certain impact resistance role. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation of the buffer assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the exploded structure of the flexible rubber ring of this utility model.

[0020] In the diagram: 1. Cylinder barrel; 2. Piston rod; 3. Sealing cover; 4. Bearing; 5. Eccentric sleeve; 6. Connecting rod; 7. Trunnion assembly; 701. Shaft seat; 702. Support ring; 703. Rubber buffer ring; 704. Wear-resistant layer; 705. Reinforcing block; 8. Buffer assembly; 801. Outer ring plate; 802. Inner ring plate; 803. Buffer spring; 804. Damping rod; 805. Rubber airbag; 9. Stress relief groove; 10. Flexible rubber ring. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] like Figure 1 , Figure 3 and Figure 4 As shown, this embodiment of an impact-resistant trunnion telescopic cylinder includes a cylinder barrel 1, a piston rod 2, and a buffer assembly 8. The piston rod 2 is slidably mounted on one side of the cylinder barrel 1. A sealing cover 3, which fits tightly against the piston rod 2, is inserted into one side of the cylinder barrel 1, and a rubber sealing ring matching the piston rod 2 is provided inside the sealing cover 3. An eccentric sleeve 5 is rotatably mounted on one side of the piston rod 2 via a bearing 4, and a connecting rod 6 is fixed to one side of the eccentric sleeve 5. Two stress relief grooves 9 are formed on the outer side of the tail of the cylinder barrel 1, and a flexible rubber ring 10 is provided inside the stress relief grooves 9. The thickness of the cylinder barrel 1 is 1 / 5 of the wall thickness; a connecting rod 6 is rotatably mounted on one side of the piston rod 2 via a bearing 4 and an eccentric sleeve 5. The eccentric sleeve 5 facilitates dynamic compensation of the trunnion assembly 7 at the end of the connecting rod 6, reduces the equipment assembly accuracy requirements, reduces stress concentration caused by installation deviation, and thus enhances reliability; the flexible rubber ring 10 inside the stress relief groove 9 can deform and absorb energy when the tail of the cylinder barrel 1 is impacted, thereby playing a certain impact resistance role. The thickness of the stress relief groove 9 is 1 / 5 of the wall thickness of the cylinder barrel 1. This design makes the cylinder barrel 1 less prone to damage or cracking.

[0023] like Figure 1 and Figure 4As shown, trunnion assemblies 7 are installed at the end of the connecting rod 6 and on one side of the tail of the cylinder 1. The trunnion assembly 7 includes a bearing seat 701, a reinforcing block 705, and a support ring 702. The reinforcing blocks 705 are fixed on both sides of the bearing seat 701, and the support ring 702 is fixed in the inner groove of the middle part of the bearing seat 701. The trunnion assembly 7 also includes a rubber buffer ring 703 and a wear-resistant layer 704. The rubber buffer ring 703 is provided on the inner side of the support ring 702, and the wear-resistant layer 704 is fixed on the inner side of the rubber buffer ring 703. The two trunnion assemblies 7 on both sides facilitate the installation of the connecting rod 6 and the cylinder 1, respectively. The design of the bearing seat 701 facilitates the strengthening of the structural strength of the trunnion assembly. The support ring 702 in the inner groove of the bearing seat 701 can bear radial force, and the inner rubber buffer ring 703 can absorb axial impact, making it suitable for strong vibration environments such as mining machinery and port equipment.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, a buffer assembly 8 is installed between the connecting rod 6 and the trunnion assembly 7. The buffer assembly 8 includes an outer ring plate 801, an inner ring plate 802, a buffer spring 803, and a damping rod 804. Both the outer ring plate 801 and the inner ring plate 802 are annular structures, located on opposite sides of the buffer assembly 8. Buffer springs 803 are evenly distributed in an array on the side of the outer ring plate 801 closest to the inner ring plate 802, and damping rods 804 are installed inside the buffer springs 803. The buffer assembly 8 also includes a rubber airbag 805, with a rubber airbag fixed to the other side of the buffer spring 803. The rubber airbag 805 is fixedly connected to the inner ring plate 802 on the other side; the connecting rod 6 is connected to the piston rod 2; the buffer spring 803 between the outer ring plate 801 and the inner ring plate 802 on the outer side of the connecting rod 6 can absorb vibration and play a role in buffering and depressurizing; the damping rod 804 can play a role in damping vibration; and the rubber airbag 805 on the other side of the buffer spring 803 can quickly absorb vibration through the compressibility of the gas inside it, while suppressing the counter-vibration of the buffer spring 803, so that the buffer assembly 8 can quickly absorb pressure when the piston rod 2 is subjected to instantaneous impact, thereby improving the impact resistance reliability.

[0025] Working principle: First, bearing seats 701 are installed on one side of the cylinder barrel 1 and piston rod 2 respectively. During use, the side bearing seats 701 can enhance the structural strength, while the support ring 702 in the inner groove of the bearing seat 701 can bear the radial force, and the inner rubber buffer ring 703 can absorb the axial impact, making it suitable for strong vibration environments such as mining machinery and port equipment; the connecting rod 6 is rotatably installed on one side of the piston rod 2 through the bearing 4 and the eccentric sleeve 5. The setting of the eccentric sleeve 5 can dynamically compensate the trunnion assembly 7 at the end of the connecting rod 6, reduce the equipment assembly accuracy requirements, reduce stress concentration caused by installation deviation, and thus enhance reliability.

[0026] During use, the buffer spring 803 between the outer ring plate 801 and the inner ring plate 802 on the outer side of the connecting rod 6 can absorb vibration and play a role in buffering and relieving pressure. The damping rod 804 can play a role in damping vibration. Furthermore, the rubber air bladder 805 on the other side of the buffer spring 803 can quickly absorb vibration through the compressibility of the gas inside it, while suppressing the back vibration of the buffer spring 803. This allows the buffer assembly 8 to quickly absorb pressure when the piston rod 2 is subjected to instantaneous impact, thus improving its impact resistance reliability. At the same time, the flexible rubber ring 10 inside the stress relief groove 9 can deform and absorb energy when the tail of the cylinder 1 is subjected to impact, thereby playing a certain impact resistance role. This completes the use process of the impact-resistant trunnion telescopic cylinder.

[0027] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An impact-resistant trunnion telescopic cylinder, comprising a cylinder barrel (1), a piston rod (2), and a buffer assembly (8), characterized in that, A piston rod (2) is slidably provided on one side of the cylinder (1). An eccentric sleeve (5) is rotatably installed on one side of the piston rod (2) via a bearing (4), and a connecting rod (6) is fixed on one side of the eccentric sleeve (5). A trunnion assembly (7) is installed on the end of the connecting rod (6) and on one side of the tail of the cylinder (1). A buffer assembly (8) is installed between the connecting rod (6) and the trunnion assembly (7). The buffer assembly (8) includes an outer ring plate (801), an inner ring plate (802), and a buffer spring (803). The outer ring plate (801) and the inner ring plate (802) are located on both sides of the buffer assembly (8). The buffer springs (803) are evenly distributed in an array on the side of the outer ring plate (801) near the inner ring plate (802).

2. The impact-resistant trunnion telescopic cylinder according to claim 1, characterized in that, A sealing cover (3) that fits tightly against the piston rod (2) is inserted into one side of the cylinder (1), and a rubber sealing ring that matches the piston rod (2) is provided inside the sealing cover (3).

3. The impact-resistant trunnion telescopic cylinder according to claim 1, characterized in that, The trunnion assembly (7) includes a bearing seat (701), a reinforcing block (705) and a support ring (702). The reinforcing blocks (705) are fixed on both sides of the bearing seat (701), and the support ring (702) is fixed in the inner groove in the middle of the bearing seat (701).

4. The impact-resistant trunnion telescopic cylinder according to claim 3, characterized in that, The trunnion assembly (7) also includes a rubber buffer ring (703) and a wear-resistant layer (704). The inner side of the support ring (702) is provided with a rubber buffer ring (703), and the inner side of the rubber buffer ring (703) is fixed with a wear-resistant layer (704).

5. The impact-resistant trunnion telescopic cylinder according to claim 1, characterized in that, The buffer assembly (8) further includes a damping rod (804), the outer ring plate (801) and the inner ring plate (802) are both ring-shaped structures, and the buffer spring (803) is provided with a damping rod (804) inside.

6. The impact-resistant trunnion telescopic cylinder according to claim 5, characterized in that, The buffer assembly (8) also includes a rubber airbag (805), which is fixed to the other side of the buffer spring (803), and the other side of the rubber airbag (805) is fixedly connected to the inner ring plate (802).

7. The impact-resistant trunnion telescopic cylinder according to claim 1, characterized in that, Two stress relief grooves (9) are provided on the outer side of the tail of the cylinder (1), and a flexible rubber ring (10) is provided inside the stress relief groove (9), and the thickness of the stress relief groove (9) is 1 / 5 of the wall thickness of the cylinder (1).

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