Crawler energy storage hydraulic tensioning device and paver

Abstract

The invention relates to a track energy storage hydraulic tensioning device and a paver. The tensioning device comprises a hydraulic cylinder body and an oil cylinder piston rod, a transition body with a central through hole is arranged in the middle of the hydraulic cylinder body, an inner cavity of the hydraulic cylinder body is divided into two cavities, one cavity is located on the cylinder cover side of the hydraulic cylinder body, and the other cavity is located on the opening side of the hydraulic cylinder body and used for allowing a piston rod of the oil cylinder to stretch out and draw back. An isolation piston is embedded in the cylinder cover cavity in a sliding mode, and the cylinder cover cavity is divided into an air cavity and an oil cavity. An inflation valve and a hydraulic joint are arranged on the hydraulic cylinder body and are respectively connected with the air chamber and the oil chamber; the spreading machine is provided with the tensioning device. The device is simple in structure, high in reliability, easy to maintain and low in cost, and the stability, reliability and safety of the crawler walking system are improved.

Description

Technical Field

[0001] The invention relates to a crawler energy storage hydraulic tensioning device and a paver, belonging to the technical field of paver equipment. Background Art

[0002] The paver is a key equipment for road construction. It is mainly composed of a travel system, a material conveying system, a material distribution system, and a compaction system. The crawler travel system is a common travel method used by the paver. Due to its construction characteristics, the paver requires its travel device to have good stability and good tensioning performance. Therefore, the tensioning device plays a vital role. It is responsible for the tensioning of the entire crawler of the paver, avoiding derailment, and maintaining the left and right consistency of tension, thereby ensuring the smooth operation of the paver. It has a direct impact on the construction quality of the paver.

[0003] At present, the crawler track tensioning device in the industry generally adopts spring tensioning, which has poor manufacturing and assembly consistency and low reliability. Another method uses a hydraulic cylinder, an external accumulator, and a hose connection in the middle. This method is costly, and the hose connection has safety hazards and high maintenance costs.

[0004] Therefore, there is an urgent need for a crawler energy storage hydraulic tensioner and a paver with simple structure, high reliability, simple maintenance and low cost. Summary of the invention

[0005] The object of the present invention is to overcome the above-mentioned shortcomings and provide a crawler energy storage hydraulic tensioning device and a paver with simple structure, high reliability, simple maintenance and low cost.

[0006] The object of the present invention is achieved in that: A crawler track energy storage hydraulic tensioning device comprises a hydraulic cylinder body and a cylinder piston rod slidably embedded in the hydraulic cylinder body; A transition body with a central through hole is arranged in the middle of the hydraulic cylinder body, dividing the inner cavity of the hydraulic cylinder body into two cavities, one is a cylinder head cavity located on the cylinder head side of the hydraulic cylinder body, and the other is an open cavity located on the opening side of the hydraulic cylinder body for the extension and retraction of the oil cylinder piston rod; An isolating piston is slidably embedded in the cylinder head cavity to isolate the cylinder head cavity into two parts, one part is located in the sealed cavity on the cylinder head side to form an air chamber, and the other part is connected to the open cavity through the central through hole of the transition body to form an oil chamber; An air charging valve and a hydraulic joint are arranged on the hydraulic cylinder body and are connected with the air chamber and the oil chamber respectively.

[0007] Furthermore, the cylinder barrel of the hydraulic cylinder body is divided into two parts, a left cylinder body and a right cylinder body, the transition body is arranged between the left cylinder body and the right cylinder body, and the cylinder cover is arranged at the left end of the left cylinder body.

[0008] Furthermore, the cylinder head, the left cylinder body, the transition body and the right cylinder body are installed and connected by welding.

[0009] Furthermore, the inflation valve is arranged on the cylinder head and connected to the air chamber through a through hole arranged in the cylinder head.

[0010] Furthermore, the hydraulic connector is arranged on the transition body and is connected to the oil chamber through a central through hole inside the transition body.

[0011] Furthermore, a piston sealing assembly is provided on the isolation piston for sealing between the isolation piston and the hydraulic cylinder body.

[0012] Furthermore, a cylinder rod sealing assembly is provided on the hydraulic cylinder body for sealing between the hydraulic cylinder body and the cylinder piston rod.

[0013] Furthermore, the isolation piston and the oil cylinder piston rod are both provided with inner concave holes to increase the volume of the oil chamber.

[0014] A paver, whose traveling system is equipped with any one of the above crawler energy storage hydraulic tensioning devices to tighten the crawler.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The crawler track energy storage hydraulic tensioner of the present invention integrates gas energy storage and hydraulic tensioning oil cylinder, improves the compactness and reliability of the overall structure of the tensioner, realizes the gas energy storage chamber and hydraulic tensioning through a single cylinder body, and the pressure of the hydraulic oil can pass through the isolation piston to store energy in the gas chamber, thereby improving the walking stability and reliability of the crawler track of the engineering equipment; The paver of the present invention improves the walking stability of the paver and the reliability of the track tensioning by installing the crawler energy storage hydraulic tensioning device, and significantly improves the working efficiency of the paver, improves the construction quality, and has good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a track energy storage hydraulic tensioning device.

[0017] in: Inflating valve 1, hydraulic cylinder body 2, isolation piston 3, piston sealing assembly 4, hydraulic joint 5, cylinder rod sealing assembly 6, cylinder piston rod 7; Cylinder head 21, left cylinder 22, transition body 23, right cylinder 24. DETAILED DESCRIPTION Example

[0018] See also Figure 1The present invention relates to a track energy storage hydraulic tensioning device, comprising a hydraulic cylinder body 2, a cylinder piston rod 7 slidably embedded in the hydraulic cylinder body 2, the cylinder barrel of the hydraulic cylinder body 2 is divided into a left cylinder body 22 and a right cylinder body 24, and a cylinder cover 21 is installed at the left end of the left cylinder body 22; A transition body 23 with a central through hole is provided between the left cylinder body 22 and the right cylinder body 24 in the middle of the hydraulic cylinder body 2, dividing the inner cavity of the hydraulic cylinder body 2 into two cavities, one of which is a cylinder head cavity located on the cylinder head 21 side of the hydraulic cylinder body 2, and the other is an open cavity located on the open side of the hydraulic cylinder body 2 for the oil cylinder piston rod 7 to telescope; the cylinder head 21, the left cylinder body 22, the transition body 23 and the right cylinder body 24 are installed and connected by welding; An isolation piston 3 is slidably embedded in the cylinder head cavity to isolate the cylinder head cavity into two parts, one part is a sealed cavity located on the side of the cylinder head 21 to form an air chamber, and the other part is connected to the open cavity through the central through hole of the transition body 23 to form an oil chamber. The isolation piston 3 and the cylinder piston rod 7 are both provided with inner concave holes to increase the volume of the oil chamber; a piston sealing assembly 4 is provided on the isolation piston 3 to seal between the isolation piston 3 and the hydraulic cylinder body 2; a cylinder rod sealing assembly 6 is provided on the hydraulic cylinder body 2 to seal between the hydraulic cylinder body 2 and the cylinder piston rod 7; The hydraulic cylinder body 2 is provided with an air charging valve 1 and a hydraulic joint 5, which are connected to the air chamber and the oil chamber respectively. The air charging valve 1 is provided on the cylinder head 21, and is connected to the air chamber through a through hole provided in the cylinder head 21; the hydraulic joint 5 is provided on the transition body 23, and is connected to the oil chamber through a central through hole in the transition body 23; A certain amount of inert gas is charged into the air chamber through the charging valve 1. When the track is tightened, hydraulic oil is injected into the oil chamber through the hydraulic joint 5. The oil cylinder piston rod 7 extends under the action of the hydraulic pressure, and the oil cylinder piston rod 7 pushes the track to tighten it. At the same time, the isolation piston 3 compresses the gas in the air chamber under the reaction force of the hydraulic oil, so that it maintains a certain pressure potential energy and plays an energy storage role. When the crawler walking system of the engineering equipment is working and suddenly encounters abnormal resistance, its energy storage can keep the crawler walking system running smoothly.

[0019] The track energy storage hydraulic tensioner of this embodiment integrates the gas energy storage and the hydraulic tensioning cylinder, realizes the gas energy storage chamber and the hydraulic tensioning through a single cylinder body, and the pressure of the hydraulic oil can pass through the isolation piston to store energy in the gas chamber, thereby improving the compactness and reliability of the overall structure of the tensioner, simple maintenance, low cost, and improving the stability and reliability of the track of the engineering equipment. Example

[0020] The present invention relates to a paver, whose walking system is equipped with a track energy storage hydraulic tensioning device of the above-mentioned embodiment to tighten the track, thereby improving the compactness, economy, safety and reliability of the track tensioning system device, improving the walking stability of the paver, the reliability of the track tensioning, and significantly improving the working efficiency of the paver, improving the construction quality, and having good economic and social benefits.

[0021] In addition to the paver of this embodiment, the crawler energy storage hydraulic tensioning device of the present invention can also be applied to other engineering equipment equipped with a crawler travel system, and has good promotion value.

[0022] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A crawler track energy storage hydraulic tensioner, comprising a hydraulic cylinder body (2), and a cylinder piston rod (7) slidably embedded in the hydraulic cylinder body (2), characterized in that: A transition body (23) with a central through hole is provided in the middle of the hydraulic cylinder body (2) to divide the inner cavity of the hydraulic cylinder body (2) into two cavities, one of which is a cylinder head cavity located on the cylinder head (21) side of the hydraulic cylinder body (2), and the other is an open cavity located on the opening side of the hydraulic cylinder body (2) for the oil cylinder piston rod (7) to telescope. An isolating piston (3) is slidably embedded in the cylinder head cavity to isolate the cylinder head cavity into two parts, one part being a sealed cavity located on the cylinder head (21) side to form an air chamber, and the other part being connected to the open cavity via a central through hole of the transition body (23) to form an oil chamber; An air charging valve (1) and a hydraulic joint (5) are provided on the hydraulic cylinder body (2) and are connected to the air chamber and the oil chamber respectively.

2. The track energy storage hydraulic tensioner according to claim 1, characterized in that: The cylinder barrel of the hydraulic cylinder body (2) is divided into two parts, a left cylinder body (22) and a right cylinder body (24); the transition body (23) is arranged between the left cylinder body (22) and the right cylinder body (24); and the cylinder head (21) is arranged at the left end of the left cylinder body (22).

3. The track energy storage hydraulic tensioner according to claim 2, characterized in that: The cylinder head (21), the left cylinder (22), the transition body (23) and the right cylinder (24) are installed and connected by welding.

4. The track energy storage hydraulic tensioner according to claim 1, characterized in that: The inflation valve (1) is arranged on the cylinder head (21) and is connected to the air chamber via a through hole arranged in the cylinder head (21).

5. The track energy storage hydraulic tensioner according to claim 1, characterized in that: The hydraulic joint (5) is arranged on the transition body (23) and is connected to the oil chamber via a central through hole inside the transition body (23).

6. The track energy storage hydraulic tensioner according to claim 1, characterized in that: A piston sealing assembly (4) is provided on the isolation piston (3) and is used for sealing between the isolation piston (3) and the hydraulic cylinder body (2).

7. The track energy storage hydraulic tensioner according to claim 1, characterized in that: The hydraulic cylinder body (2) is provided with a cylinder rod sealing assembly (6) for sealing between the hydraulic cylinder body (2) and the oil cylinder piston rod (7).

8. The track energy storage hydraulic tensioner according to claim 1, characterized in that: The isolation piston (3) and the oil cylinder piston rod (7) are both provided with inner concave holes to increase the volume of the oil chamber.

9. A paver, characterized in that: Its traveling system is equipped with any one of the track energy storage hydraulic tensioning devices in claims 1 to 8 to tighten the track.

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