A frame shifting mechanism for a paver

Abstract

A kind of rack displacement mechanism for paver, it is related to engineering mechanical equipment technical field, including rack and track assembly, the rack and track assembly are connected by side support shaft and front fork arm, the rear part of the frame body of track assembly is equipped with a hinged hole, support shaft is transversely arranged in the hinged hole, the support shaft is connected with the side of rack by bolt and uses pressing plate as guide when lifting up and down, the support shaft is pushed by hydraulic cylinder fixed on rack, the rack displacement mechanism for paver, which uses hydraulic cylinder to assist lifting rack, cooperates with large-diameter oil cylinder and is equipped with hydraulic lock, manually locks bolt, can lift rack with lower pressure, lower pressure means higher safety factor, simple and reliable structure, it can meet the different needs of ordinary thickness paving and large thickness paving, the setting of hydraulic lock can effectively prevent displacement when hydraulic cylinder appears internal leakage and pipeline failure, further improves the safety and reliability of mechanism.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery and equipment technology, and in particular to a frame displacement mechanism for a paver. Background Technology

[0002] Asphalt concrete pavers are key equipment used in the construction of highways, airports and other projects for paving asphalt surface layers, water-stabilized base layers and graded crushed stone subbase layers.

[0003] However, the fixed or limited adjustable frame height of traditional pavers presents significant shortcomings when paving thick layers: the height of the auger spreader, the lifting height of the screed, and the height of the scraper outlet cannot be adapted to thick material layers, resulting in low paving efficiency and difficulty in guaranteeing quality. To address this issue, various OEMs have successively developed frame height adjustment mechanisms, but existing technologies have significant drawbacks:

[0004] The domestic solution uses a bolted connection between the frame and track frame, with manual adjustment of the hole positions. This requires the assistance of hydraulic jacks, which is not only labor-intensive and inefficient, but also poses safety hazards during manual alignment.

[0005] The overseas solution uses a hydraulic push rod and eccentric shaft structure to achieve frame lifting. Although this achieves automated adjustment, the structure is complex and relies entirely on the force of the hydraulic cylinder to maintain the adjusted height. If problems such as internal leakage in the cylinder or pipeline failure occur, the frame is at risk of displacement, resulting in insufficient safety. Utility Model Content

[0006] The technical problem this utility model aims to solve is to overcome the existing defects and provide a paver frame displacement mechanism. This mechanism uses a hydraulic cylinder to assist in lifting the frame, in conjunction with a large-diameter oil cylinder and equipped with a hydraulic lock. Manual bolt tightening is then performed. This allows for the frame to be lifted with relatively low pressure, which translates to a higher safety factor. The structure is simple and reliable, meeting the different needs of both ordinary and thick-thickness paving. The hydraulic lock effectively prevents displacement in case of internal leakage in the hydraulic cylinder or pipeline failure, further improving the safety and reliability of the mechanism and effectively solving the problems in the background art.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A paver frame displacement mechanism includes a frame and a track assembly. The frame and track assembly are connected by a side support shaft and a front fork arm. The rear of the track assembly frame is provided with a hinge hole, through which a support shaft passes. The support shaft is bolted to the side of the frame and uses a pressure plate as a guide rail for vertical lifting. The support shaft is pushed by a hydraulic cylinder fixed on the frame.

[0009] Furthermore, the side of the frame is provided with several holes for fixing the support shaft at different height positions.

[0010] Furthermore, the hydraulic cylinder is equipped with a hydraulic lock.

[0011] Furthermore, the pressure plate guides the support shaft when the frame moves up and down.

[0012] Furthermore, the mounting end of the hydraulic cylinder is rotatably connected to the frame, and the telescopic end of the hydraulic cylinder is rotatably connected to the end of the support shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The frame displacement mechanism for this paver has the following advantages:

[0014] 1. It adopts a hydraulic cylinder-assisted lifting frame, with a large-diameter oil cylinder and equipped with a hydraulic lock. The bolts are then tightened manually, which can push the frame up with lower pressure. Lower pressure means a higher safety factor, and the structure is simple and reliable.

[0015] 2. By arranging several holes on the side of the frame, the support shaft can be fixed at different heights, so that the frame can be stably stopped at different heights, meeting the different needs of ordinary thickness paving and thick thickness paving.

[0016] 3. The mounting end of the hydraulic cylinder is rotatably connected to the frame, and the telescopic end of the hydraulic cylinder is rotatably connected to the end of the support shaft. This allows the hydraulic cylinder to better adapt to the angle changes during the lifting and lowering of the frame when it pushes the support shaft, reducing stress concentration and improving the service life of the mechanism.

[0017] 4. The hydraulic lock effectively prevents displacement in case of internal leakage of the hydraulic cylinder or pipeline failure, further improving the safety and reliability of the mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the high-level frame structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the high-position front structure of the frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the low-level frame structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the low-profile front structure of the frame of this utility model.

[0022] In the diagram: 1-frame, 2-track assembly, 3-hydraulic cylinder. Detailed Implementation

[0023] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0024] Please see Figure 1-4 This embodiment provides a technical solution: a paver frame displacement mechanism, including a frame 1 and a track assembly 2. The frame 1 and the track assembly 2 are connected by a side support shaft and a front fork arm. The rear of the track assembly 2 is provided with a hinge hole, through which a support shaft passes to form a rear support. The support shaft is bolted to the side of the frame 1 and a pressure plate is used as a guide rail for vertical lifting, thereby ensuring the smoothness of the support shaft movement. The support shaft is pushed by a hydraulic cylinder 3 fixed on the frame 1. Since the hydraulic cylinder 3 uses a large-diameter oil cylinder, it can push the frame 1 to lift under lower pressure, which has a high safety factor.

[0025] The side of the frame 1 has several holes for fixing the support shaft at different heights. The hydraulic cylinder 3 is equipped with a hydraulic lock. The pressure plate guides the support shaft when the frame 1 moves up and down. The mounting end of the hydraulic cylinder 3 is rotatably connected to the frame 1, and the telescopic end of the hydraulic cylinder 3 is rotatably connected to the end of the support shaft. When a large thickness of paving is required, the hydraulic cylinder 3 fixed on the frame 1 is extended. Since the telescopic end of the hydraulic cylinder 3 is rotatably connected to the end of the support shaft, and the mounting end of the hydraulic cylinder 3 is also rotatably connected to the frame 1, the hydraulic cylinder 3 can smoothly push the support shaft upward along the pressure plate guide rail, thereby lifting the frame 1. After the frame 1 is raised to the appropriate height, the support shaft is fixed to the corresponding hole on the side of the frame 1 with bolts. At the same time, the hydraulic lock on the hydraulic cylinder 3 is locked to prevent internal leakage of the hydraulic cylinder 3 from causing the frame 1 to shift. When paving with normal thickness, the bolts fixing the support shaft are loosened, the hydraulic cylinder 3 is controlled to retract, and the support shaft is driven to move downward along the pressure plate guide rail, so that the frame 1 returns to the normal position. The support shaft is then fixed to the corresponding hole on the side of the frame 1 with bolts, and the hydraulic lock remains locked to ensure the stability of the position of the frame 1.

[0026] The mechanism is simple and reliable, easy to operate, and highly safe, and can well meet the needs of the paver for frame displacement when paving with different thicknesses.

[0027] The working principle of the paver frame displacement mechanism provided by this utility model is as follows: For ordinary thickness paving operations: At this time, the hydraulic cylinder 3 is in the retracted state, and the support shaft is fixed to the hole on the side of the frame 1 corresponding to the normal position by bolts. The frame 1 is at its normal working height, which can meet the operational requirements of ordinary thickness paving. The hydraulic lock is in the locked state, ensuring that the hydraulic cylinder 3 will not accidentally extend or retract, thus ensuring the stability of the frame 1.

[0028] Thick-thickness paving operation: When thick-thickness paving is required, first operate the hydraulic system to unlock the hydraulic lock, then control the extension of hydraulic cylinder 3. Hydraulic cylinder 3 pushes the support shaft upward along the pressure plate guide rail, lifting the frame 1. When the frame 1 is raised to the height required for thick-thickness paving, control the hydraulic cylinder 3 to stop moving and relock the hydraulic lock to prevent internal leakage. Subsequently, bolts are manually passed through the corresponding holes on the side of the frame 1 to securely connect the support shaft to the frame 1, completing the repositioning of the frame 1. Throughout the process, due to the use of large-diameter hydraulic cylinders, the frame 1 can be lifted under relatively low pressure, resulting in a high safety factor.

[0029] It is worth noting that the components disclosed in the above embodiments are all general standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. For example, a rotary connection can refer to a rotary connection through bearings or pins.

[0031] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A frame repositioning mechanism for a paver, comprising a frame (1) and a track assembly (2), characterized in that: The frame (1) and track assembly (2) are connected by a side support shaft and a front fork arm. The rear of the track assembly (2) has a hinge hole, through which a support shaft passes. The support shaft is bolted to the side of the frame (1) and uses a pressure plate as a guide rail for lifting up and down. The support shaft is pushed by a hydraulic cylinder (3) fixed on the frame (1).

2. The paver frame repositioning mechanism according to claim 1, characterized in that: The side of the frame (1) has several holes for fixing the support shaft at different height positions.

3. The paver frame repositioning mechanism according to claim 1, characterized in that: The hydraulic cylinder (3) is equipped with a hydraulic lock.

4. The paver frame repositioning mechanism according to claim 1, characterized in that: The pressure plate guides the support shaft when the frame (1) moves up and down.

5. The paver frame repositioning mechanism according to claim 1, characterized in that: The mounting end of the hydraulic cylinder (3) is rotatably connected to the frame (1), and the telescopic end of the hydraulic cylinder (3) is rotatably connected to the end of the support shaft.

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