Tamping air cylinder structure for tamping device

Abstract

The utility model relates to the technical field of tamping machines, in particular to a tamping air cylinder structure for a tamping device, which comprises an air cylinder pipe, a gasket sealing kit, an air cylinder cover and a piston connecting rod, the air cylinder pipe forms a main body supporting structure of the tamping air cylinder, and the air cylinder cover is fixedly connected to one end of the air cylinder pipe. The air cylinder cover and the air cylinder pipe are matched to form a closed air cylinder cavity, the sealing kit is fixedly connected to the connecting portion of the air cylinder cover and the air cylinder pipe and the end of the air cylinder pipe, the sealing kit comprises a guide sleeve, a step seal and a dustproof ring which are coaxially arranged in a sleeved mode, and one end of a piston connecting rod is connected into the air cylinder pipe in a sliding mode. The other end of the gasket extends to the outside of the air cylinder pipe, and the gasket is fixedly connected between the air cylinder cover and the air cylinder pipe. The sealing kit comprising the multiple layers of sealing structures is adopted to replace a traditional single-layer O-shaped ring, the sealing performance of the connecting portion of the air cylinder cover and the air cylinder pipe and the sealing performance of the end of the air cylinder pipe are enhanced, dust and pulverized coal are prevented from invading, and sealing aging is delayed.

Description

Technical Field

[0001] This utility model relates to the field of tamping machine technology, and more specifically, to a tamping cylinder structure for a tamping device. Background Technology

[0002] Tamping is one of the main tasks in the maintenance of ballast railway tracks, effectively improving track stability and ensuring safe train operation. The tamping device is the core component of the tamping operation, a device with combined vibration and clamping functions. The tamping pick transmits the vibration force generated by the vibration to the ballast, causing it to vibrate and move, increasing the density of the track bed. Simultaneously, under the clamping force, the tamping pick compresses the ballast in the sleeper gaps towards the bottom of the sleepers, making the ballast at the bottom of the sleepers more compact, improving track stability, and ensuring safe train operation.

[0003] For example, CN222008500U discloses a tamping device and tamping vehicle for tamping railway sleepers. The tamping device includes a fixed support and rotary actuators respectively disposed at both ends of the fixed support. Each rotary actuator has a tamping component connected to its output end, and the tamping components connected to the two rotary actuators perform tamping operations from both sides of the sleeper. However, the tamping cylinders used in existing tamping devices only use a single-layer O-ring seal at the connection between the cylinder head and the cylinder tube, and a single-lip dustproof ring at the piston rod outlet. Under long-term dust intrusion and pressure impact, the seal will age and gas will leak, resulting in a decrease in cylinder thrust. Utility Model Content

[0004] Based on the aforementioned technical problem that traditional tamping cylinders use only a single-layer O-ring seal at the connection between the cylinder head and cylinder tube, and a single-lip dustproof ring at the piston rod outlet, the seals will age and leak under long-term dust intrusion and pressure impact, leading to a decrease in cylinder thrust. Therefore, this invention proposes a tamping cylinder structure for a tamping device.

[0005] The present invention proposes a tamping cylinder structure for a tamping device, comprising a cylinder tube, a gasket sealing kit, a cylinder head, and a piston connecting rod;

[0006] The cylinder tube constitutes the main support structure of the tamping cylinder;

[0007] The cylinder head is fixedly connected to one end of the cylinder tube, and together with the cylinder tube, they form a closed cylinder chamber;

[0008] The sealing kit is fixedly connected to the connection between the cylinder head and the cylinder tube and the end of the cylinder tube. The sealing kit includes a guide sleeve, a step seal, and a dust ring that are coaxially sleeved.

[0009] One end of the piston connecting rod is slidably connected to the inside of the cylinder tube, and the other end extends to the outside of the cylinder tube;

[0010] The gasket is fixedly connected between the cylinder head and the cylinder tube.

[0011] Preferably, the tamping cylinder further includes a reverse pin, which is fixedly connected to the positioning hole in the cylinder tube.

[0012] Preferably, the tamping cylinder further includes a castle nut, which is threadedly connected to the end threaded section of the piston connecting rod.

[0013] Preferably, the tamping cylinder further includes a rubber damping block, which is fixedly connected to the end of the cylinder tube.

[0014] Preferably, the tamping cylinder further includes a first sliding bearing and two second sliding bearings, wherein: the first sliding bearing is slidably sleeved on the mating section between the piston connecting rod and the cylinder head; and the second sliding bearing is slidably sleeved on the end connecting section of the piston connecting rod.

[0015] Preferably, the tamping cylinder further includes a spring washer, which is fitted onto the threaded portion of the internal hexagonal bolt.

[0016] Preferably, the cylinder tube and the cylinder head are fixedly connected by a plurality of internal hex bolts, and the bolts are evenly distributed along the circumference of the cylinder head.

[0017] Preferably, the end of the piston connecting rod is provided with a hinge seat, and the hinge seat is rotatably connected to a tamping arm via a pin.

[0018] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0019] 1. A sealing kit with a multi-layer sealing structure is adopted to replace the traditional single-layer O-ring, which enhances the sealing performance of the connection between the cylinder head and the cylinder tube, as well as the end of the cylinder tube, preventing dust and coal dust from entering and delaying seal aging. The gasket helps to improve the sealing and buffering of the connection between the cylinder head and the cylinder tube, reducing the impact of pressure shock on the seal. This solves the defects of traditional tamping cylinder seals, avoids gas leakage and premature wear of seals, ensures stable thrust of the tamping cylinder, and improves the reliability and service life of the tamping cylinder under dust and pressure shock conditions.

[0020] 2. Washers enhance the sealing and cushioning of the cylinder head and cylinder tube connection; reverse pins position the cylinder tube, ensuring precise installation of the overall structure; castle nuts lock the piston connecting rod end connection, preventing loosening.

[0021] 3. The first and second sliding bearings provide guidance and support for the movement of the piston and connecting rod, reducing friction. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0023] In the diagram: 1. Rubber damping block; 2. Cylinder tube; 3. Reverse pin; 4. Castle nut; 5. Nameplate; 6. Washer; 7. Sealing kit; 8. Cylinder head; 9. Piston connecting rod; 10. First sliding bearing; 11. Spring washer; 12. Socket head bolt; 13. Second sliding bearing. Detailed Implementation

[0024] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In this utility model, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, "fixed connection" can mean fixed installation, detachable connection, or integral; it can mean mechanical connection or electrical connection; it can mean direct connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1 As shown, a tamping cylinder structure for a tamping device includes a cylinder tube 2, a gasket 6, a sealing kit 7, a cylinder head 8, and a piston connecting rod 9; the cylinder tube 2 constitutes the main support structure of the tamping cylinder.

[0026] The cylinder head 8 is fixedly connected to one end of the cylinder tube 2, and together with the cylinder tube 2, forms a closed cylinder chamber;

[0027] The sealing kit 7 is fixedly connected to the connection between the cylinder head 8 and the cylinder tube 2, as well as the end of the cylinder tube 2. The sealing kit 7 includes a guide sleeve, a step seal, and a dust seal that are coaxially sleeved. The sealing kit 7 is press-fitted into the mounting groove at the end of the cylinder tube 2. The guide sleeve is close to the inner side of the cylinder head 8 and provides radial support for the piston connecting rod 9. The step seal is located on the outer side of the guide sleeve 71 and is a stepped polyurethane sealing ring with the main lip facing the high-pressure side inside the cylinder. The dust seal is located on the outermost side and is a double-lip structure made of rubber. The outer lip blocks dust, and the inner lip scrapes off impurities attached to the piston rod.

[0028] One end of the piston connecting rod 9 is slidably connected to the cylinder tube 2, and the other end extends to the outside of the cylinder tube 2; the gasket 6 is fixedly connected between the cylinder head 8 and the cylinder tube 2. The sealing kit 7 seals the connection between the cylinder head 8 and the cylinder tube 2 and the end of the cylinder tube 2 through the sealing structure, preventing gas leakage in the cylinder and preventing external dust from entering the cylinder chamber.

[0029] Gasket 6 enhances the sealing and cushioning of the connection between cylinder head 8 and cylinder tube 2. Cylinder tube 2 and cylinder head 8 form a working chamber. The multi-layer sealing structure of sealing kit 7, compared with traditional single-layer O-ring seals, can improve sealing performance, resist long-term dust intrusion and pressure shock, delay seal aging, reduce gas leakage, and avoid cylinder thrust reduction due to sealing problems. Gasket 6 also optimizes the sealing and cushioning of the connection between cylinder head and cylinder tube, solves the defects of traditional cylinder seals, and ensures stable cylinder thrust output.

[0030] The tamping cylinder also includes a reverse pin 3, which is fixedly connected to the positioning hole of the cylinder tube 2. The reverse pin 3 serves to position the cylinder tube 2. The reverse pin 3 provides positioning for the cylinder tube assembly, preventing installation deviations from affecting the cylinder's operating accuracy and ensuring smooth reciprocating motion of the piston connecting rod 9.

[0031] The tamping cylinder also includes a nameplate 5, which is fixedly installed on the outer wall of the cylinder tube 2 and located between the rubber damping block 1 and the reverse pin 3.

[0032] The tamping cylinder also includes a castle nut 4, which is threaded to the end threaded section of the piston rod 9. The castle nut 4 locks the end connection of the piston rod 9 to prevent loosening.

[0033] The tamping cylinder also includes a rubber damping block 1, which is fixedly connected to the end of the cylinder tube 2. The rubber damping block 1 absorbs the vibration and impact force transmitted from the piston movement and the external environment.

[0034] The tamping cylinder also includes a first sliding bearing 10 and two second sliding bearings 13, wherein: the first sliding bearing 10 is slidably sleeved on the mating section between the piston connecting rod 9 and the cylinder head 8; and the second sliding bearings 13 are slidably sleeved on the end connecting section of the piston connecting rod 9.

[0035] The first sliding bearing 10 and the second sliding bearing 13 provide guidance and support for the movement of the piston connecting rod 9, thereby reducing friction.

[0036] The tamping cylinder also includes a spring washer 11, which is fitted onto the threaded portion of the socket head cap screw 12. The spring washer 11, in conjunction with the socket head cap screw 12, prevents the screw from loosening and improves connection stability.

[0037] The cylinder tube 2 and the cylinder head 8 are fixedly connected by multiple hexagon socket head cap bolts 12, which are evenly distributed around the circumference of the cylinder head 8. The fixing of the cylinder tube 2 and the cylinder head 8 by multiple evenly distributed hexagon socket head cap bolts 12 ensures that the connection is subjected to uniform force, enhances the sealing performance and structural strength of the connection between the cylinder head and the cylinder tube, and can better resist pressure impacts compared to non-uniformly distributed connections.

[0038] The piston connecting rod 9 has a hinged seat at its end, and the hinged seat is rotatably connected to the tamping arm via a pin. The hinged seat at the end of the piston connecting rod 9 is connected to the tamping arm via a pin, forming a rotatable hinged structure for tamping the sleepers.

[0039] During operation, an external air source supplies air to the closed cylinder chamber formed by the cylinder tube 2 and the cylinder head 8. The gas pushes the piston connecting rod 9 to make reciprocating linear motion in the cylinder tube 2. The tamping arm, connected by the hinge seat and pin at the end of the piston connecting rod 9, is used to tamp the sleepers.

[0040] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A tamping cylinder structure for a tamping device, characterized in that... include: Cylinder pipe (2); The cylinder head (8) is fixedly connected to one end of the cylinder tube (2) and cooperates with the cylinder tube (2) to form a closed cylinder chamber; A sealing kit (7) is fixedly connected to the connection between the cylinder head (8) and the cylinder tube (2) and the end of the cylinder tube (2). The sealing kit (7) includes a guide sleeve, a step seal and a dust ring that are coaxially sleeved. The piston connecting rod (9) has one end slidably connected to the cylinder tube (2) and the other end extends to the outside of the cylinder tube (2); Washer (6) is fixedly connected between the cylinder head (8) and the cylinder tube (2).

2. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: It also includes a reverse pin (3), which is fixedly connected to the positioning hole of the cylinder tube (2).

3. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: It also includes a castle nut (4), which is threaded to the end threaded section of the piston rod (9).

4. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: It also includes a rubber damping block (1), which is fixedly connected to the end of the cylinder tube (2).

5. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: It also includes a first sliding bearing (10) and two second sliding bearings (13), wherein: The first sliding bearing (10) is slidably sleeved on the mating section between the piston connecting rod (9) and the cylinder head (8); The second sliding bearing (13) is slidably sleeved on the end connecting section of the piston connecting rod (9).

6. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: It also includes a spring washer (11), which is fitted onto the threaded portion of the internal hex bolt (12).

7. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: The cylinder tube (2) and the cylinder head (8) are fixedly connected by a plurality of internal hex bolts (12).

8. The tamping cylinder structure for the tamping device according to claim 1, characterized in that: The piston connecting rod (9) is provided with a hinge seat at its end, and the hinge seat is rotatably connected to a tamping arm via a pin.

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