A tamping device and tamping vehicle

Abstract

This application provides a tamping device and a 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. It has the advantages of simple and compact structure, small size and lightweight, space saving, flexible use and convenient operation. It is applicable to the field of railway track maintenance technology.

Description

Technical Field

[0001] This application relates to the field of railway track maintenance technology, specifically to a tamping device and a tamping machine. 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 different track bed conditions, the tamping device is key to the efficiency of the tamping pick by outputting appropriate excitation frequency and amplitude through vibration.

[0004] Currently, there are many sources of vibration. The most common tamping device involves a motor driving an eccentric shaft to rotate, which in turn excites the tamping arm. Simultaneously, a clamping cylinder connected to the arm via a connecting rod extends its piston rod to clamp the arm when needed. However, this method, using a motor to drive an eccentric shaft, results in a long transmission chain, complex structure, and large footprint. Hydraulic vibration has also been proposed, but while it occupies less space, it is structurally complex with numerous parts, leading to higher costs for parts processing, assembly, and maintenance. Summary of the Invention

[0005] To address one of the aforementioned technical deficiencies, this application provides a tamping device and a tamping vehicle.

[0006] This application provides a tamping device for tamping railway sleepers. The tamping device includes a fixed support and two rotary actuators respectively disposed at both ends of the fixed support. Each rotary actuator is connected to a tamping component at its output end, and the tamping components connected to the two rotary actuators perform tamping operations from both sides of the sleeper.

[0007] Preferably, the tamping assembly includes a tamping pick mounting base, the lower end of which is provided with a first through hole, a first connecting rod is sleeved in the first through hole, and the two ends of the first connecting rod extend out of the first through hole and are hinged to the tamping pick assembly; the tamping pick mounting base is connected to the output end.

[0008] Preferably, the tamping pick mounting base and the tamping pick assembly are further connected by a vertically arranged hydraulic cylinder assembly.

[0009] Preferably, the top of the tamping pick mounting base on the side away from the rotary actuator is hinged to the cylinder end of the hydraulic cylinder assembly, and the telescopic rod end of the hydraulic cylinder assembly is hinged to the tamping pick assembly.

[0010] Preferably, the tamping pick assembly includes an inner tamping pick and an outer tamping pick; the hydraulic cylinder assembly includes a first hydraulic cylinder and a second hydraulic cylinder; the top of the inner tamping pick is provided with two second through holes, and the two second through holes are respectively sleeved on both ends of the first connecting rod; the inner tamping pick is hinged to the telescopic rod end of the first hydraulic cylinder; the top of the outer tamping pick is provided with two third through holes, and the two third through holes are respectively sleeved on both ends of the first connecting rod; the outer tamping pick is hinged to the telescopic rod end of the second hydraulic cylinder.

[0011] Preferably, the device comprises a servo valve, an actuator cylinder, and two actuator end caps located at both ends of the actuator cylinder; the actuator cylinder is provided with a first valve, a second valve, and a third valve; the inlet of the servo valve is connected to the first valve and the second valve respectively, and the outlet of the servo valve is connected to the first valve, the second valve, and the third valve respectively; a blade assembly is provided on the middle of the outer wall of the output end, and an axial gap is left between the blade assembly and the two actuator end caps; the two ends of the output end pass through the two actuator end caps respectively and are connected to the tamping assembly.

[0012] Preferably, the output end is rotatably connected to both actuator end caps via hydrostatic bearings.

[0013] Preferably, a first extension is provided on the side of the fixed bracket that is close to the rotary actuator, and the fixed bracket is connected to the outer wall of the actuator cylinder through the first extension.

[0014] Preferably, a displacement sensor is provided inside the rotating cavity.

[0015] The present invention also provides a tamping vehicle, including the tamping device described above.

[0016] The technical solution provided in this application uses two rotary actuators respectively located at both ends of a fixed bracket. These rotary actuators are connected to the tamping assembly and are directly used for the excitation and clamping functions of the tamping pick. The rotary actuators have advantages such as large output torque, high efficiency, and smooth operation. Furthermore, they eliminate the need for mechanical excitation cylinders or connecting rods found in traditional solutions, greatly simplifying the structure of the tamping device and facilitating reduction in size and weight. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a tamping device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a tamping component of a tamping device provided in an embodiment of this application;

[0020] Figure 3 A front view of a tamping component of a tamping device provided in an embodiment of this application;

[0021] Figure 4 A side view of a tamping component of a tamping device provided in an embodiment of this application;

[0022] Figure 5 A schematic diagram of part B of a tamping component of a tamping device provided in an embodiment of this application;

[0023] In the diagram, 10 is a sleeper, 20 is a fixed bracket, 30 is a rotary actuator, 40 is a tamping assembly, 301 is an output end, 302 is a servo valve, 303 is an actuator cylinder, 304 is an actuator end cap, 401 is a tamping pick mounting base, 402 is a first connecting rod, 403 is a tamping pick assembly, 404 is a hydraulic cylinder assembly, 4031 is an inner tamping pick, 4032 is an outer tamping pick, 4041 is a first hydraulic cylinder, and 4042 is a second hydraulic cylinder. Detailed Implementation

[0024] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0025] In the process of realizing this application, the inventors discovered that providing a tamping device with a simple structure, convenient use, and the ability to better achieve the dual functions of vibration and clamping is an effective measure to improve the maintenance effect of ballast railway track bed.

[0026] This embodiment provides a tamping device that can be applied to a tamping machine to tamp railway sleepers. The length direction of the tamping machine is the same as the track extension direction. In this embodiment, the length direction of the tamping machine is referred to as the longitudinal direction, the width direction of the tamping machine is referred to as the transverse direction, and the height direction of the tamping machine is referred to as the vertical direction.

[0027] Figure 1 This is a schematic diagram of the structure of a tamping device provided in an embodiment of this application, as shown below. Figure 1As shown, in order to address the above-mentioned problems, this application provides a tamping device in Embodiment 1 for tamping the sleeper 10. The tamping device includes a fixed support 20 and two rotary actuators 30 respectively disposed at both ends of the fixed support 20. The two rotary actuators 30 have the same structure.

[0028] The fixed bracket 20 can extend longitudinally, and two rotary actuators 30 are respectively disposed at both ends of the fixed bracket 20.

[0029] During the tamping operation, as the tamping machine moves forward, when the fixed support 20 is above the sleeper 10, the two rotary actuators 30 are symmetrically arranged on both sides of the sleeper 10, and the axes of the two rotary actuators 30 are parallel to the sleeper 10.

[0030] The axial end of the rotary actuator 30 serves as the output end 301, and each output end 301 is connected to a tamping component 40.

[0031] In one embodiment, both axial ends of the rotary actuator 30 serve as output ends 301, and are connected to tamping components 40. This means that two tamping components 40 connected to the same rotary actuator 30 are arranged laterally at intervals. The tamping component 40 connected to one axial end of the rotary actuator 30 is located on the outer side of the track, and the tamping component 40 connected to the other axial end of the rotary actuator 30 is located on the inner side of the track.

[0032] In the above scheme, there are a total of four tamping components 40. The two tamping components 40 located on the outer side of the track form a pair and are used to tamp the sleepers 10 on the outer side of the track; the two tamping components 40 located on the inner side of the track form a pair and are used to tamp the sleepers 10 on the inner side of the track.

[0033] The tamping device provided in this application has a simple and compact structure. Its small and lightweight design saves a lot of space, is flexible in use and easy to operate, and uses fewer parts, resulting in low assembly and maintenance costs. A rotary actuator is used to twist the tamping components, thereby achieving tamping of the sleepers.

[0034] Rotary actuators offer advantages such as high output torque, high efficiency, small size, and smooth operation. By controlling the rotation angle and frequency of the rotary actuators, the rotation angle and frequency of the tamping components can be controlled, generating a dual effect of excitation and clamping to adapt to the tamping requirements of different sleepers. Two rotary actuators are symmetrically arranged on both sides of the sleeper, with their axes parallel to the sleeper. This allows the tamping components connected to the two rotary actuators to tamp relative to each other, resulting in a larger tamping area and better tamping effect. The identical structure of the two rotary actuators ensures that the output angle and frequency at their output ends are consistent, leading to better tamping performance. By moving the fixed support, the entire tamping device can be moved to maintain the sleeper requiring tamping.

[0035] Figure 2 This is a schematic diagram of the structure of a tamping component of a tamping device provided in an embodiment of this application. Figure 3 A front view of a tamping component of a tamping device provided in an embodiment of this application, as shown below. Figure 2 , Figure 3 As shown, the tamping assembly 40 further includes a tamping pick mounting base 401, the lower end of which is provided with a first through hole extending longitudinally. A first connecting rod 402 is fitted inside the first through hole, and the two ends of the first connecting rod 402 extend out of the first through hole and are hinged to the tamping pick assembly 403.

[0036] The tamping pick mounting base 401 is connected to the output end 301, for example, by means of bolts.

[0037] In this application, the output end is connected to the tamping pick mounting base. By controlling the tamping pick mounting base, the tamping pick assembly hinged to the first connecting rod is synchronously controlled, resulting in a stable connection structure. The high-frequency rotation generated by the rotary actuator rotates through the output end, driving the tamping pick mounting base and the tamping pick assembly along... Figure 3 The sleeper is tamped by high-frequency torsion in direction A as shown in the diagram.

[0038] Furthermore, the tamping pick mounting base 401 and the tamping pick assembly 403 are connected by a vertically arranged hydraulic cylinder assembly 404. The hydraulic cylinder assembly 404 is used to drive the tamping pick assembly 403 to swing in a plane perpendicular to the horizontal direction.

[0039] In one specific embodiment, the top of the side of the tamping pick mounting base 401 away from the rotary actuator 30 is hinged to the cylinder end of the hydraulic cylinder assembly 404, and the telescopic rod end of the hydraulic cylinder assembly 404 is hinged to the tamping pick assembly 403.

[0040] In this application, the tamping pick assembly can be adjusted in the direction perpendicular to the sleeper by adjusting the telescopic rod end of the hydraulic cylinder assembly, so as to adapt to the tamping requirements of different sleepers.

[0041] Furthermore, the tamping pick assembly 403 includes an inner tamping pick 4031 and an outer tamping pick 4032, which are arranged laterally at intervals. The top two sides of the inner tamping pick 4031 extend upwards to form two opposing connecting arms. Each connecting arm has a second through hole, through which it is respectively fitted onto both ends of the first connecting rod 402, achieving a hinged connection between the inner tamping pick 4031 and the first connecting rod 402. The top two sides of the outer tamping pick 4032 extend upwards to form two opposing connecting arms. Each connecting arm has a third through hole, through which it is respectively fitted onto both ends of the first connecting rod 402, achieving a hinged connection between the outer tamping pick 4032 and the first connecting rod 402.

[0042] The hydraulic cylinder assembly 404 includes a first hydraulic cylinder 4041 and a second hydraulic cylinder 4042. The first hydraulic cylinder 4041 extends vertically, with its top end hinged to the tamping pick mounting base 401, and the bottom end of its telescopic rod hinged to the inner tamping pick 4031. The second hydraulic cylinder 4042 extends vertically, with its top end hinged to the tamping pick mounting base 401, and the bottom end of its telescopic rod hinged to the outer tamping pick 4032. In this application, both the inner and outer tamping picks are hinged to the first connecting rod, with the inner tamping pick hinged to the telescopic rod end of the first hydraulic cylinder and the outer tamping pick hinged to the telescopic rod end of the second hydraulic cylinder. This allows the inner and outer tamping picks to be adjusted separately in a direction perpendicular to the sleeper, making it more convenient and effective to tampe the sleeper.

[0043] Furthermore, the middle part of the fixed bracket 20 is hollow, that is, the middle part of the fixed bracket 20 has a cavity, which can reduce the weight of the entire tamping device, making it lighter and more energy-saving.

[0044] Figure 4 This is a side view of the tamping component of a tamping device provided in an embodiment of this application. Figure 5 A schematic diagram of part B of a tamping component of a tamping device provided in an embodiment of this application is shown below. Figure 4 and Figure 5 As shown, the rotary actuator 30 can be a hydrostatically supported axial actuator. The rotary actuator 30 includes a servo valve 302, an actuator cylinder 303, and two actuator end caps 304 disposed at both ends of the actuator cylinder 303.

[0045] The actuator cylinder 303 is equipped with a first valve, a second valve, and a third valve; the inlet of the servo valve 302 is connected to the first valve and the second valve respectively, and the outlet of the servo valve is connected to the first valve, the second valve, and the third valve respectively.

[0046] Specifically, the servo valve can be either a pneumatic servo valve or a hydraulic servo valve.

[0047] A blade assembly is provided on the middle part of the outer wall of the output end 301. The blade assembly includes at least four blades evenly distributed on the outer wall of the output end. There is an axial gap between the blade assembly and the two actuator end covers 304, so that the blades and actuator end covers do not contact each other during operation, and will not cause wear on the blades and actuator end covers, resulting in a long service life.

[0048] Specifically, the blade assembly is positioned within a sealed environment formed between the actuator cylinder, the actuator end cover, and the output end, enabling the servo valve to better control the rotation of the blades.

[0049] The two ends of the output end 301 pass through the two actuator end caps 304 and are connected to the tamping assembly 40. The output end 301 and the two actuator end caps 304 are rotatably connected by hydrostatic bearings. A circulating surface oil film fills the space between the output end and the actuator end cap, so that the output end and the actuator end cap do not make direct contact. Even when completely stationary, a bearing oil film can be established, thereby avoiding friction loss and surface damage, and ensuring high-precision rotational control of the output end.

[0050] The rotary actuator controls the first, second, and third valves via a servo valve, enabling it to control the forward or reverse rotation of the blades. This, in turn, controls the rotation angle of the output end, causing the tamping device to rotate in both directions to tamp the sleepers. Through the high-frequency, small-amplitude alternating forward and reverse operation of the blades, the tamping assembly achieves high-frequency torsion, which in turn excites the ballast, causing it to vibrate and move to the bottom of the sleepers, increasing the density of the track bed. When clamping is required, the alternating frequency of the blades decreases while the amplitude increases, causing the tamping assembly to press the ballast in the sleepers towards the bottom.

[0051] Furthermore, a first extension is provided on the side of the fixed bracket 20 that is close to the rotary actuator 30. The fixed bracket 20 is connected to the outer wall of the actuator cylinder 303 through the first extension. The connection structure is stable, thereby making the output of the output end more stable and ensuring a good tamping effect.

[0052] Furthermore, a displacement sensor is installed inside the rotating cavity 305 to facilitate the control of the rotation angle of the tamping component.

[0053] Specifically, the tamping device also includes a control component, which is electrically connected to the servo valve 302, the first hydraulic cylinder 4041, the second hydraulic cylinder 4042, the first valve, the second valve, and the third valve, respectively.

[0054] The control components control the servo valve, which in turn controls the first valve, the second valve, and the third valve, thereby controlling the rotation angle of the blades and the output end.

[0055] Working principle:

[0056] During the tamping machine's movement, when it moves close to the sleeper via the tamping assembly, the control assembly sends a tamping command to the two rotary actuators (the two rotary actuators include a first rotary actuator and a second rotary actuator). Upon receiving the command, the servo valve on the first rotary actuator connects its outlet to the first and third valves, and its inlet to the second valve. Similarly, upon receiving the command, the control assembly connects the servo valve outlet on the second rotary actuator to the second and third valves, and its inlet to the first valve. This controls the blades of the first rotary actuator to rotate clockwise, thereby causing its output end to rotate clockwise. Conversely, the control assembly controls the blades of the second rotary actuator to rotate counter-clockwise, causing its output end to rotate counter-clockwise. The counter-rotating outputs of the two rotary actuators further drive the tamping assemblies connected to them to twist in opposite directions.

[0057] When the control component sends opposing tamping commands to the two rotary actuators, after receiving the opposing tamping command, the servo valve on the first rotary actuator connects its outlet to the second and third valves, and its inlet to the first valve (the same applies to the second rotary actuator; after receiving the opposing tamping command, the control component connects its outlet to the first and third valves, and its inlet to the second valve). This reverses the rotation of the blades of the first rotary actuator, causing its output to reverse as well (and the blades of the second rotary actuator rotate clockwise, causing its output to rotate clockwise). The opposing rotation of the outputs of the two rotary actuators further causes the tamping components connected to them to twist in opposite directions.

[0058] The opposing tamping commands and the back-to-back tamping commands are executed alternately to tamp the sleepers. When the alternation frequency of the opposing and back-to-back commands is increased and the amplitude is small, the excitation effect of the tamping pick assembly can be achieved simultaneously; when the duration of the opposing command is long and the duration of the back-to-back command is short and the amplitude is large, the clamping effect of the tamping pick assembly can be achieved, resulting in a better tamping effect on the sleepers.

[0059] The above-mentioned scheme provided in this application can be used for tamping a single sleeper, i.e., single-sleeper tamping operation. In addition, the above scheme can be improved to tamp two or three sleepers simultaneously, i.e., double-sleeper tamping operation or triple-sleeper tamping operation.

[0060] For example, a tamping assembly connected to one rotary actuator is connected to another tamping assembly via a connecting rod, transmitting high-frequency vibrations through the connecting rod; a tamping assembly connected to another rotary actuator is also connected to yet another tamping assembly via a connecting rod. The two tamping assemblies, extended and connected by the connecting rod, tampe from both sides of another sleeper, achieving double-sleeper tamping operation.

[0061] This embodiment also provides a tamping machine that employs any of the tamping devices described above. The tamping device provided in this embodiment has the same technical effects as the tamping devices described above.

[0062] Specifically, tamping devices can be symmetrically installed on both sides of the tamping machine to tamp both tracks simultaneously, thereby improving the efficiency of the tamping operation.

[0063] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0067] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A tamping device for tamping railway sleepers (10), characterized in that, The tamping device includes a fixed support (20) and rotary actuators (30) respectively disposed at both ends of the fixed support (20). Each of the rotary actuators (30) is connected to a tamping assembly (40) at its output end (301). The tamping assemblies (40) connected to the two rotary actuators (30) perform tamping operations from both sides of the sleeper (10). The rotary actuator (30) includes a servo valve (302), an actuator cylinder (303), and two actuator end caps (304) disposed at both ends of the actuator cylinder (303). The actuator cylinder (303) is provided with a first valve, a second valve and a third valve; the inlet of the servo valve (302) is connected to the first valve and the second valve respectively, and the outlet of the servo valve is connected to the first valve, the second valve and the third valve respectively; A blade assembly is provided on the middle part of the outer wall of the output end (301), and there is an axial gap between the blade assembly and the two actuator end caps (304). The two ends of the output end (301) pass through the two actuator end caps (304) and are connected to the tamping assembly (40).

2. The tamping device according to claim 1, characterized in that, The tamping assembly (40) includes a tamping pick mounting base (401), the lower end of which is provided with a first through hole, a first connecting rod (402) is sleeved in the first through hole, and the two ends of the first connecting rod (402) extend out of the first through hole and are hinged to the tamping pick assembly (403). The tamping pick mounting base (401) is connected to the output end (301).

3. The tamping device according to claim 2, characterized in that, The tamping pick mounting base (401) and the tamping pick assembly (403) are also connected by a vertically arranged hydraulic cylinder assembly (404).

4. The tamping device according to claim 3, characterized in that, The top of the tamping pick mounting base (401) on the side away from the rotary actuator (30) is hinged to the cylinder end of the cylinder assembly (404), and the telescopic rod end of the cylinder assembly (404) is hinged to the tamping pick assembly (403).

5. The tamping device according to claim 3, characterized in that, The tamping assembly (403) includes an inner tamping pick (4031) and an outer tamping pick (4032). The cylinder assembly (404) includes a first cylinder (4041) and a second cylinder (4042); The top of the inner tamping pick (4031) is provided with two second through holes, which are respectively sleeved on both ends of the first connecting rod (402); the inner tamping pick (4031) is hinged to the telescopic rod end of the first oil cylinder (4041); The top of the external tamping pick (4032) is provided with two third through holes, which are respectively sleeved on both ends of the first connecting rod (402); the external tamping pick (4032) is hinged to the telescopic rod end of the second oil cylinder (4042).

6. The tamping device according to claim 1, characterized in that, The output end (301) is rotatably connected to the two actuator end caps (304) via hydrostatic bearings.

7. The tamping device according to claim 1, characterized in that, A first extension is provided on the side of the fixed bracket (20) that is close to the rotary actuator (30), and the fixed bracket (20) is connected to the outer wall of the actuator cylinder (303) through the first extension.

8. A tamping machine, characterized in that, include: The tamping device according to any one of claims 1 to 7.

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