Tamping device and tamping operation vehicle

Abstract

The invention provides a tamping device and a tamping operation vehicle. The tamping device comprises a bearing frame; a non-eccentric section of the eccentric shaft is rotatably mounted on the bearing frame; one end of each connecting rod is rotatably connected to different eccentric sections of the eccentric shaft; each swing plate is rotatably connected to the other end of the corresponding connecting rod; the outer tamping pick arm and the inner tamping pick arm are rotatably connected with the first hydraulic cylinder and the second hydraulic cylinder respectively, are rotatably connected to the bearing frame and comprise execution ends for executing tamping operation. According to the device, energy consumption of an existing tamping device is reduced, operation noise is reduced, the stress state of the clamping oil cylinder is improved, and the oil leakage risk of the oil cylinder is reduced.

Description

Technical Field

[0001] The present invention relates to the field of railway track ballast maintenance, and more particularly to a tamping device and a tamping vehicle for performing ballast compaction operations. Background Art

[0002] The tamping device is an important working device of the large-scale track maintenance machinery tamping operation vehicle, which is used to tamp the ballast at the bottom of the sleeper and improve the overall stability of the track bed. Most of the existing tamping devices are eccentric excitation structures, which drive the eccentric shaft to rotate through the hydraulic motor, drive the clamping cylinder to vibrate, and finally convert it into the swing vibration of the pick arm to compact the ballast.

[0003] The hydraulic motor has a slow impact speed and generally operates at a fixed frequency in each stage of the operation. The clamping cylinder includes a piston rod and a piston cylinder. When the clamping cylinder is subjected to radial vibration perpendicular to the moving direction of the piston rod, the piston rod may be strained and cause oil leakage in the cylinder. Summary of the invention

[0004] The purpose of this application is to solve or at least alleviate the problems existing in the prior art.

[0005] According to one aspect of the present invention, the present invention provides a tamping device, comprising: A carrier, the carrier comprising a main body, the main body comprising one or more guide grooves extending longitudinally therethrough to connect with the guide posts, thereby moving in the vertical direction; An eccentric shaft, a non-eccentric section of the eccentric shaft is rotatably mounted to the carrier, and the eccentric shaft rotates along a first axis under the action of a driving device; a plurality of connecting rods, one end of each of the plurality of connecting rods being rotatably connected to different eccentric sections of the eccentric shaft; A plurality of swing plates, each of which is rotatably connected to the other end of a corresponding connecting rod, each of which includes: a first position connected to the connecting rod, a second position rotatably connected to the carrier, and a third position and a fourth position rotatably connected to the first hydraulic cylinder and the second hydraulic cylinder, respectively; An outer tamping pick arm and an inner tamping pick arm are rotatably connected to the first hydraulic cylinder and the second hydraulic cylinder, respectively, and are rotatably connected to the carrier frame and include an execution end for executing a tamping operation.

[0006] Optionally, in an embodiment of the tamping device, the main body includes a first side and a second side relative to each other and a first end and a second end relative to each other, and the first side and the second side of the main body respectively include an eccentric shaft bracket for supporting the eccentric shaft, wherein the eccentric shaft is composed of a first eccentric shaft and a second eccentric shaft respectively located on the first side and the second side of the main body, and the first eccentric shaft and the second eccentric shaft are coaxially arranged.

[0007] Optionally, in an embodiment of the tamping device, the main body comprises opposite first and second sides and opposite first and second ends, and the first and second sides of the main body respectively comprise eccentric shaft supports for supporting the eccentric shaft.

[0008] Optionally, in an embodiment of the tamping device, the eccentric shaft consists of a first eccentric shaft and a second eccentric shaft located at a first side and a second side of the main body respectively.

[0009] Optionally, in an embodiment of the tamping device, the first eccentric shaft and the second eccentric shaft are coaxially rigidly connected at a through hole of the main body that passes from the first side to the second side through an inner and outer spline sleeve or a flywheel structure.

[0010] Optionally, in an embodiment of the tamping device, the inner hole of the external spline sleeve is connected to the eccentric shaft via a flat key, and the external spline is rigidly connected to a flywheel with internal splines or an internal spline sleeve.

[0011] Optionally, in an embodiment of the tamping device, each of the eccentric shaft supports comprises: a first half bearing housing at an opposing first or second side of the body; an outer bearing support spaced from an opposing first or second side of the body, the outer bearing supports each comprising a second bearing housing half; and A bridge member, the bridge member comprising a third half bearing seat, a fourth half bearing seat and a connecting rod connecting the third half bearing seat and the fourth half bearing seat; The first half bearing seat and the third half bearing seat are joined to form a first bearing seat for arranging a first bearing, and the second half bearing seat and the fourth half bearing seat are joined to form a second bearing seat for arranging a second bearing; Wherein, the first eccentric shaft and the second eccentric shaft are supported by corresponding first bearings and second bearings respectively.

[0012] Optionally, in an embodiment of the tamping device, the first eccentric shaft and the second eccentric shaft are coaxially connected in the main body, and the driving device is a single motor connected to the first eccentric shaft or the second eccentric shaft; or the driving device is a first motor and a second motor connected to the first eccentric shaft and the second eccentric shaft, and the output shafts of the first motor and the second motor are coaxially connected to the first eccentric shaft and the second eccentric shaft, respectively.

[0013] Optionally, in an embodiment of the tamping device, the first motor and the second motor are variable frequency motors or hydraulic motors.

[0014] Optionally, in an embodiment of the tamping device, the variable frequency motor or the hydraulic motor is a self-sealed independent motor and is connected to the supporting frame via a flange.

[0015] Optionally, in an embodiment of the tamping device, the carrier frame further comprises: two end plates connected to the first end and the second end of the body respectively; a swing plate bracket connected to the end plate and the outer bearing bracket; Wherein, the swing plate bracket includes: a first wall and a second wall parallel to each other and an intermediate wall connecting the first wall and the second wall, the first wall is connected to the middle parts of both sides of the end plate, the second wall is connected to the outer bearing bracket via an optional first connecting plate or directly, and the first wall and the second wall include pin holes in corresponding positions to arrange the rotating shaft for the swing plate.

[0016] Optionally, in an embodiment of the tamping device, the carrier frame also includes tamping pick arm brackets respectively located outside both sides of the main body and arranged approximately in parallel, the tamping pick arm bracket including: a tamping pick arm bracket main body located below the first eccentric shaft or the second eccentric shaft and a first hanging arm and a second hanging arm extending upward from both ends of the tamping pick arm bracket main body and respectively connected to the middle walls of the swing plate brackets correspondingly arranged on both sides, the first hanging arm and the second hanging arm or the first hanging arm and the second hanging arm each having an outer tamping pick arm mounting hole at the connection with the main body, the tamping pick arm bracket main body having a pair of adjacent inner tamping pick arm mounting holes, and the tamping pick arm bracket main body is also connected to the lower side of the end plate.

[0017] Optionally, in an embodiment of the tamping device, the outer tamping pick arm and the inner tamping pick arm each include: a first end and a second end relative to each other and a rotating fulcrum between the first end and the second end rotatably connected to the supporting frame, the first ends of the outer tamping pick arm and the inner tamping pick arm are respectively rotatably connected to the first hydraulic cylinder and the second hydraulic cylinder, and the second ends of the outer tamping pick arm and the inner tamping pick arm constitute execution ends for performing tamping operations.

[0018] Optionally, in an embodiment of the tamping device, the eccentric shaft consists of a first eccentric shaft and a second eccentric shaft, the connecting rod includes a double-ear connecting rod and a single-ear connecting rod, and the first eccentric shaft and the second eccentric shaft are both connected to a combination of a double-ear connecting rod and a single-ear connecting rod, wherein the angle between the double-ear connecting rod and the single-ear connecting rod is not less than 90 degrees.

[0019] Optionally, in an embodiment of the tamping device, one end of the double-ear connecting rod includes two spaced-apart separation bearing seats, the other end of the double-ear connecting rod is a first double-ear connecting structure, one end of the single-ear connecting rod includes a combined bearing seat that can accommodate two bearings, and the other end of the single-ear connecting rod is a second double-ear connecting structure, and when the double-ear connecting rod and the single-ear connecting rod are connected to the first eccentric shaft and the second eccentric shaft through corresponding bearings and bearing seats, the combined bearing seat is located between the separation bearing seats.

[0020] Optionally, in an embodiment of the tamping device, the first double-ear connecting structure and the second double-ear connecting structure are respectively connected to a swing plate, each swing plate is connected to a first hydraulic cylinder and a second hydraulic cylinder, each first hydraulic cylinder is connected to an outer tamping pick arm, and each second hydraulic cylinder is connected to an inner tamping pick arm, and the tamping device includes a total of four connecting rods, four swing plates, four first hydraulic cylinders and four second hydraulic cylinders, and four outer tamping pick arms and four inner tamping pick arms, wherein each outer tamping pick arm and inner tamping pick arm includes two execution ends.

[0021] Optionally, in an embodiment of the tamping device, the angle between the double-ear connecting rod and the single-ear connecting rod is an obtuse angle, which can reduce the force on the eccentric shaft during operation.

[0022] Optionally, in an embodiment of the tamping device, the angle between the first hydraulic cylinder and the second hydraulic cylinder and the horizontal axis is between -10 and 10 degrees, and the angle between the outer tamping pick arm and the inner tamping pick arm and the vertical axis is between -15 and 15 degrees.

[0023] Optionally, in an embodiment of the tamping device, during the operation of the tamping device, the first hydraulic cylinder and the second hydraulic cylinder are basically kept horizontal, and the outer tamping pick arm and the inner tamping pick arm are basically kept vertical.

[0024] Optionally, in an embodiment of the tamping device, the first hydraulic cylinder and the second hydraulic cylinder are equipped with displacement sensors and pressure sensors, thereby accurately controlling the clamping pressure and stroke of the hydraulic cylinders.

[0025] Optionally, in an embodiment of the tamping device, the driving device is a variable frequency motor, and the tamping device includes a downward insertion mode and a tamping clamping mode. In the downward insertion mode, the variable frequency motor operates at a first frequency, the hydraulic lifting device drives the tamping device to descend, and the first hydraulic cylinder and the second hydraulic cylinder do not work. In the tamping clamping mode, the motor operates at the first frequency or a second frequency lower than the first frequency, the hydraulic lifting device does not work, and the first hydraulic cylinder and the second hydraulic cylinder extend.

[0026] Optionally, in an embodiment of the tamping device, the first hydraulic cylinder and the second hydraulic cylinder include a piston rod and a piston cylinder, one of the piston rod and the piston cylinder is connected to the swing plate, and the other of the piston rod and the piston cylinder is connected to the outer tamping pick arm or the inner tamping pick arm.

[0027] Optionally, in an embodiment of the tamping device, the first frequency is between 30 and 45 Hz, and the second frequency is between 25 and 40 Hz, or the first frequency is between 35 and 50 Hz, and the second frequency is between 25 and 40 Hz.

[0028] Optionally, in an embodiment of the tamping device, the first position, the second position, the third position and the fourth position of the swing plate are respectively provided with a first opening, a second opening, a third opening and a fourth opening.

[0029] Optionally, in an embodiment of the tamping device, the swing plate includes a first part, a second part and a contracted neck between the first part and the second part, the second opening and the fourth opening are located in the first part, and the first opening and the third opening are located in the second part.

[0030] Optionally, the first opening and the third opening are located above the second opening and the angle α between the line connecting the center B of the third opening and the center A of the second opening and the vertical axis V is in the range of -40 to 40 degrees, and the angle β between the line connecting the center C of the first opening and the center A of the second opening and the vertical axis V is in the range of 0 to 60 degrees.

[0031] Optionally, the first opening and the third opening are both located on the side of the eccentric axis of the line connecting the second opening and the fourth opening and away from the line, wherein the distance from the first opening to the second opening is greater than the distance from the third opening to the second opening.

[0032] Optionally, the distance between the first opening and the third opening is greater than the distance between the centers D of the second opening and the fourth opening.

[0033] Optionally, when the first opening and the third opening of the swing plate are arranged to be away from the vertical axis V and closer to the eccentric shaft within the above range, the overall up and down height and left and right width dimensions can be compressed. This structural design can make the tamping device have a more compact structure.

[0034] Optionally, in an embodiment of the tamping device, the fourth opening is below the second opening and an angle γ between a line connecting a center D of the fourth opening and a center A of the second opening and a vertical axis V is in the range of -30 to 30 degrees.

[0035] Optionally, in an embodiment of the tamping device, the swing plate swings slightly around the rotating shaft connected to the second opening, which can greatly reduce the vibration of the tail of the cylinder connected thereto and simplify the connecting rod structure connected to the first opening of the swing plate.

[0036] Optionally, in an embodiment of the tamping device, the driving device is a variable frequency motor or a hydraulic motor.

[0037] According to another aspect of the present invention, there is further provided a tamping operation vehicle, comprising: at least one tamping device as described in each embodiment.

[0038] Optionally, in an embodiment of the tamping operation vehicle, the tamping operation vehicle comprises: A mobile mode, wherein the tamping device rises along the guide column to a predetermined height, the tamping vehicle travels on the rail, and the drive device is a variable frequency motor, which can be turned off or operated at a lower frequency; A downward insertion mode, wherein the tamping vehicle is in a stopped or low-speed running state, the driving device is a variable frequency motor, and the variable frequency motor operates at a first frequency to vibrate the outer tamping pick arm and the inner tamping pick arm, and the hydraulic lifting device drives the tamping device to descend along the guide column so that the second ends of the outer tamping pick arm and the inner tamping pick arm are inserted into the ballast; and Tamping clamping mode, wherein the tamping vehicle is in a stopped or low-speed traveling state, after the tamping device is driven down to a preset position, the hydraulic lifting device stops working, the variable frequency motor operates at a first frequency or a second frequency lower than the first frequency to cause the outer tamping pick arm and the inner tamping pick arm to vibrate, the hydraulic lifting device stops, and the first hydraulic cylinder and the second hydraulic cylinder work to drive the second ends of the outer tamping pick arm and the inner tamping pick arm to compact the ballast.

[0039] In some embodiments, the first frequency is between 30 and 45 Hz and the second frequency is between 25 and 40 Hz or the first frequency is between 35 and 50 Hz and the second frequency is between 25 and 40 Hz.

[0040] According to the device of the present invention, a transmission component composed of a swing plate and a multi-link is added between the eccentric shaft and the first and second hydraulic cylinders, which not only enables the first and second hydraulic cylinders to be arranged almost horizontally, but also is no longer directly connected to the eccentric shaft, thereby improving the stress state of the clamping cylinder, greatly reducing the risk of oil leakage in the cylinder, and is conducive to extending the service life of the hydraulic cylinder used for clamping, and effectively reducing maintenance costs. At the same time, the device of the present invention can provide more design space for comprehensively considering the motion trajectory and stress conditions of the hydraulic cylinder by introducing different angle combinations composed of the swing plate and the multi-link, making the overall layout more reasonable, the stress more uniform, and convenient for the maintenance and maintenance of each component. And further, according to the optimized design of the swing plate, the relative positions between the inner and outer tamping arms on both sides of the swing plate and the first and second hydraulic cylinders can be conveniently adjusted, thereby obtaining a more compact structure.

[0041] In addition, the device according to the present invention changes the operating speed in different modes by controlling the frequency of the variable frequency motor, thereby reducing the energy consumption of the whole operation process of the tamping device and reducing the operation noise. On the one hand, the motor itself is sealed, and no additional sealing treatment is required between the motor and the tamping device, and the structure is simple; on the other hand, when one motor is installed on each side of the tamping device, the symmetrical arrangement is not biased. The device according to the present invention can carry 16 tamping pick execution ends and can be used to tamp two sleepers at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which: Figure 1 A perspective view showing a tamping device according to an embodiment of the present invention when operating on a rail; Figure 2 shows a front view of a tamping device according to an embodiment of the present invention; Figure 3 shows a side view of a tamping device according to an embodiment of the present invention; Figure 4 A perspective view of a carrier frame of a tamping device according to an embodiment of the present invention is shown; Figure 5 and Figure 6 Exploded views of different angles of a carrier frame of a tamping device according to an embodiment of the present invention are shown; Figure 7 shows a cross-sectional view of a tamping device according to an embodiment of the present invention; Figure 8 An exploded view of a first motor and a flange of a tamping device according to an embodiment of the present invention is shown; Fig. 9 A perspective view showing a swing plate of a tamping device according to an embodiment of the present invention; and Fig.10 and 11 A perspective view showing two connecting rods of a tamping device according to an embodiment of the present invention DETAILED DESCRIPTION

[0043] refer to Figures 1 to 8 The tamping device according to an embodiment of the present invention is introduced. The tamping device mainly includes: Figures 4 to 6 The carrier frame 1 shown and the components mounted on the carrier frame 1 to be movable relative to the carrier frame 1. The carrier frame 1 is connected to the guide column 93 to move in the vertical direction under the drive of the hydraulic lifting device. For example, the carrier frame 1 includes a main body 11, and the main body 11 includes one or more guide grooves 110 that penetrate the main body 11 in the vertical direction for engaging with the guide column 93. For example, in some embodiments, as shown in the figure, the main body 11 includes a pair of guide columns 93, and a connecting groove for connecting the lifting cylinder is between the pair of guide columns 93, thereby driving the entire tamping device to move in the vertical direction through the lifting cylinder to approach and insert or leave the ballast. The eccentric shaft includes an eccentric section and a non-eccentric section. The eccentric shaft is rotatably mounted to the carrier frame through the non-eccentric section. The eccentric shaft rotates along the first axis under the action of the driving device. Please refer to the following. Figure 7In the XX direction shown, the first axis is, for example, substantially horizontal. The rotation of the eccentric shaft is converted into the vibration of the tamping pick arm through a number of transmission components, thereby facilitating the insertion of the second end of the tamping pick arm into the ballast. The number of transmission components includes a plurality of connecting rods 41, 42, a plurality of swing plates 5, and a first hydraulic cylinder 61 and a second hydraulic cylinder 62. One end of the plurality of connecting rods 41, 42 is rotatably connected to different eccentric sections of the eccentric shaft, and the other end of the plurality of connecting rods 41, 42 is rotatably connected to the corresponding swing plates 5, each swing plate 5 includes: a first position 51 connected to the connecting rods 41, 42 and a second position 52 rotatably connected to the carrier, a third position 53 rotatably connected to the first hydraulic cylinder 61 and a fourth position 54 of the second hydraulic cylinder 62, so that the swing plate reciprocates along the second position 52 as the rotation center under the action of the connecting rod, and the swing of the swing plate 5 is transmitted to the first hydraulic cylinder 61 and the second hydraulic cylinder 62. Each first hydraulic cylinder 61 is connected to the outer tamping pick arm 71 and each second hydraulic cylinder 62 is connected to the inner tamping pick arm 72. The outer tamping pick arm 71 and the inner tamping pick arm 72 are rotatably connected to the carrier and include an execution end for performing a tamping operation, such as a tamping pick. In some embodiments, the outer tamping pick arm 71 and the inner tamping pick arm 72 each include: a first end 712, 722 and a second end 713, 723 opposite to each other and a rotation fulcrum 711, 721 rotatably connected to the carrier between the first end and the second end, the first end 712, 722 of the outer tamping pick arm 71 and the inner tamping pick arm 72 are rotatably connected to the first hydraulic cylinder 61 or the second hydraulic cylinder 62, respectively, and the second end 713, 723 of the outer tamping pick arm 71 and the inner tamping pick arm 72 are the execution ends for performing a tamping operation. In some embodiments, the first hydraulic cylinder 61 and the second hydraulic cylinder 62 are equipped with a displacement sensor and a pressure sensor, thereby accurately controlling the clamping pressure and stroke of the hydraulic cylinder.

[0044] In some embodiments, Figure 6As clearly shown in the figure, the main body 11 may be roughly sheet-shaped and include opposite first and second sides 111 and 112 around the guide groove 110 and opposite first and second ends 113 and 114. The first side 111 and the second side 112 of the main body 11 may also be referred to as main planes, which have the largest surface area, and the main components of the tamping device are roughly symmetrically arranged on the first side 111 and the second side 112 of the main body 11. For example, the first side 111 and the second side 112 of the main body 11 include an eccentric shaft bracket for supporting the eccentric shaft. In some embodiments, the eccentric shaft is composed of a first eccentric shaft 31 and a second eccentric shaft 32 respectively located on the first side 111 and the second side 112 of the main body 11. The first eccentric shaft 31 and the second eccentric shaft 32 are coaxially arranged and coaxially connected in the main body 11. For example, the main body 11 may include a through hole 116 extending from the first side 111 to the second side 112. The through hole 116 may be located in the middle of the main body 11. The first eccentric shaft 31 and the second eccentric shaft 32 are coaxially fixedly connected through the through hole 116. For example, the first eccentric shaft 31 and the second eccentric shaft 32 are coaxially rigidly connected through internal and external spline sleeves or a flywheel structure, and the flywheel is arranged on the outer circumference of the internal spline sleeve, which is conducive to obtaining a more compact axial size. In some embodiments, the inner holes of the two external spline sleeves 82 and 83 are respectively connected to the first eccentric shaft 31 and the second eccentric shaft 32 through flat keys, and the external splines of the two external spline sleeves 82 and 83 are rigidly connected to the flywheel 81 or the internal spline sleeve with internal splines. Alternatively, a single eccentric shaft passing through the through hole 116 may be used, or the first eccentric shaft 31 and the second eccentric shaft 32 may also be connected in other suitable ways.

[0045] In some embodiments, each eccentric shaft support includes: a first half bearing seat 115 on the opposite first side 111 or second side 112 of the main body 11; an outer bearing support 14 spaced apart from the opposite first side 111 or second side 112 of the main body 11, each outer bearing support 14 including a second half bearing seat 141; and a bridge member 15, the bridge member 15 including a third half bearing seat 151, a fourth half bearing seat 152 and a connecting rod 153 connecting the third half bearing seat 151 and the fourth half bearing seat 152; wherein the first half bearing seat 115 and the third half bearing seat 151 are joined to form a first bearing seat for arranging the first bearing 34, the second half bearing seat 141 and the fourth half bearing seat 152 are joined to form a second bearing seat for arranging the second bearing 35, and the first eccentric shaft 31 and the second eccentric shaft 32 are supported by the corresponding first bearing 34 and the second bearing 35, respectively (see Figure 7). In some embodiments, the outer bearing bracket 14 is roughly in an inverted Y shape, with a second half bearing seat 141 on the upper part, and a stopper 142 extending axially from the ends of the two legs below, which is connected to the tamping pick arm bracket through the stopper 142. The first bearing 34, the second bearing 35 and the eccentric shaft 31 can be easily assembled by the combined bridge 15. The three can be pre-assembled and placed on the bearing bracket before assembling the bridge 15. In addition, this structure is also convenient for the maintenance of the eccentric shaft or bearing, and the eccentric shaft or bearing can be easily disassembled and replaced when a failure occurs.

[0046] In some embodiments, the first eccentric shaft and the second eccentric shaft are coaxially connected in the body, and the driving device can be a single motor connected to the eccentric shaft, for example, a single motor can be connected to the first eccentric shaft or the second eccentric shaft. Figure 7 As shown, the driving device may be a first motor 21 and a second motor 22 connected to a first eccentric shaft 31 and a second eccentric shaft 32, and the output shafts of the first motor 21 and the second motor 22 are coaxially connected to the first eccentric shaft 31 and the second eccentric shaft 32, respectively. Alternatively, the first eccentric shaft 31 and the second eccentric shaft 32 may only be coaxially arranged without being connected, and both are driven by independent motors, respectively.

[0047] In addition, if Figure 8 As shown, the flange 20 can be connected to the outer bearing support 14 and the bridge 15 by bolts passing through the bolt holes 201 on the flange 20, and the housings of the first motor 21 and the second motor 22 can be connected to the flange 20 by bolts, or a set of bolts can be provided to directly connect the motor and the flange together to the outer bearing support 14 and the bridge 15. In some embodiments, the first motor 21 and the second motor 22 can be variable frequency motors, that is, they can operate at multiple frequencies. The first motor 21 and the second motor 22 can be independent components and sealed by themselves. In addition, the first motor 21 and the second motor 22 can be easily disassembled for maintenance or replacement. Alternatively, the first motor 21 and the second motor 22 can also be hydraulic motors.

[0048] In some embodiments, the carrier 1 further comprises: an end plate 12 connected to the first end 113 and the second end 114 of the main body 11, and a swing plate bracket 17 connected to the end plate 12 and the outer bearing bracket 14. In some embodiments, the swing plate bracket 17 may be U-shaped, with an opening facing inward and arranged horizontally, and comprises: a first wall 171 and a second wall 172 parallel to each other and an intermediate wall 173 connecting the first wall 171 and the second wall 172, the first wall 171 being connected to the end plate 12, and the second wall 172 being connected to the outer bearing bracket 14 via an optional first connecting plate 18. Alternatively, the first connecting plate 18 may be formed integrally with the outer bearing bracket 14. The first wall 171 and the second wall 172 include pin holes 170 corresponding in position to arrange a rotating shaft for the swing plate 5. In some embodiments, a second connecting plate 19 may also be provided, which is connected between the main body 11 and the first connecting plate 18 or the outer bearing bracket 14 to strengthen the support of the outer bearing bracket 14 and the stability of the entire structure. In some embodiments, the support frame 1 also includes a pair of guide plates 191 connected to the opposite first side 111 and the second side 112 of the main body 11. The guide plate 191 is constructed with a vertical slope, one end of which is connected to the side of the main body 11 avoiding the first bearing seat 115, and the other end is connected to the inner side of the main body of the tamping arm bracket 16, which is beneficial to improving the structural strength of the support frame 1.

[0049] In some embodiments, the carrier frame 1 further includes a tamping pick arm bracket 16 respectively located outside the two sides of the main body and arranged roughly in parallel, and the tamping pick arm bracket 16 includes: a tamping pick arm bracket main body 160 arranged below the first eccentric shaft 31 and the second eccentric shaft 32, and a first hanging arm 161 and a second hanging arm 162 extending upward from both ends of the tamping pick arm bracket main body (160) and respectively connected to the swing plate bracket 17 correspondingly arranged on both sides, such as the intermediate wall 173 thereof. The tamping pick arm bracket 16 is also U-shaped as a whole, and its opening is arranged upward. The first hanging arm 161 and the second hanging arm 162 each have an outer tamping pick arm mounting hole 163, or the mounting hole 163 can also be arranged at the connection between the first hanging arm 161 and the second hanging arm 162 and the main body 160, and the middle part of the tamping pick arm bracket main body 160 has a pair of adjacent inner tamping pick arm mounting holes 164. The rotation fulcrum 711 of the outer tamping pick arm 71 is rotatably connected to the outer tamping pick arm mounting hole 163, and the rotation fulcrum 721 of the inner tamping pick arm 72 is rotatably connected to the inner tamping pick arm mounting hole 164, wherein Figure 3 As shown, the inner ramming pick arms 72 are staggered in the axial direction to avoid mutual interference. Figure 5 As shown, the end plate 12 may be roughly fish-shaped, and the middle part 121 of both sides thereof may have grooves to connect to the swing plate bracket 17, and the main body of the tamping pick arm bracket 16 is connected to one side of the lower part 122 of the end plate 12. According to the above-mentioned carrier 1, by utilizing the connection between the swing plate bracket 17 and the hanging arms at both ends of the end plate 12 and the tamping pick arm bracket 16, a stable installation support is provided for the swing plate, which has good structural strength and compactness.

[0050] The above-mentioned carrier 1 is composed of a plurality of components, and each component can be connected, for example, by welding or other connection methods that are easy to disassemble. In some embodiments, some components of the carrier 1 can be integrally formed instead of being separately formed as shown in the figure.

[0051] Continue to refer Fig. 9 The specific structure of the swing plate according to the embodiment is introduced. In some embodiments, the first position 51, the second position 52, the third position 53 and the fourth position 54 of the swing plate 5 are respectively provided with the first opening 501, the second opening 502, the third opening 503 and the fourth opening 504, so the swing plate 5 can also be called a four-hole plate. In an alternative embodiment, the first position 51, the second position 52, the third position 53 and the fourth position 54 may have a rotating shaft. In some embodiments, the swing plate 5 includes a first part 55, a second part 56 and a contracted neck 57 between the first part 55 and the second part 56, the second opening 502 and the fourth opening 504 are located in the first part 55, and the first opening 501 and the third opening 503 are located in the second part 56.

[0052] In some embodiments, the swing plate 5 is designed according to the following structure: the first opening 501 and the third opening 503 are located above the second opening 502, and the angle α between the line connecting the center B of the third opening 503 and the center A of the second opening 502 and the vertical axis V is in the range of -40 to 40 degrees, and the angle β between the line connecting the center C of the first opening 501 and the center A of the second opening 502 and the vertical axis V is in the range of 0 to 60 degrees. In some embodiments, the fourth opening 504 is located below the second opening 502, and the angle γ between the line connecting the center D of the fourth opening 504 and the center A of the second opening 502 and the vertical axis V is in the range of -30 to 30 degrees. Fig. 9For example, the angles α, β, and γ marked relative to the vertical axis V are positive directions. In a specific embodiment, α, β, and γ can be 0 at the same time, or α and β are not 0 and γ is 0. In this case, for example, the fourth opening 504 is directly below the second opening 502. In some embodiments, the first opening 501 and the third opening 503 are both located on the side of the eccentric axis of the line connecting the second opening 502 and the fourth opening 504 and away from the line, and α is in the range of 0 to 40 degrees. In some embodiments, the first opening and the third opening of the swing plate 5 are arranged to be away from the vertical axis V and closer to the eccentric axis within the above range, which can compress the overall upper and lower height and left and right width dimensions. This structural design can make the tamping device obtain a more compact structure. In some embodiments, the spacing between the first opening 501 and the third opening 503 is greater than the spacing between the second opening 502 and the fourth opening 504. The swing plate 5 according to the above construction has a compact structure and a small size and can ensure that the third opening 503 and the fourth opening 504 are sufficiently spaced apart and allow the first hydraulic cylinder 61 and the second hydraulic cylinder 62 to remain basically horizontal and make the first hydraulic cylinder 61 and the second hydraulic cylinder 62 basically axial during the swinging process to reduce the radial force.

[0053] In some embodiments, the angle between the first hydraulic cylinder 61 and the second hydraulic cylinder 62 and the horizontal axis is between -10 and 10 degrees, and the angle between the outer tamping pick arm 71 and the inner tamping pick arm 72 and the vertical axis is between -15 and 15 degrees. In some embodiments, during the operation of the tamping device, the first hydraulic cylinder 61 and the second hydraulic cylinder 62 remain substantially horizontal, and the outer tamping pick arm 71 and the inner tamping pick arm 72 remain substantially vertical.

[0054] Continue to refer Fig.10 and Fig.11 In some embodiments, the connecting rods 41, 42 include a double-ear connecting rod 41 and a single-ear connecting rod 42, the eccentric shaft is composed of a first eccentric shaft 31 and a second eccentric shaft 32, the first eccentric shaft 31 and the second eccentric shaft 32 are connected in the same manner with a combination consisting of a double-ear connecting rod 41 and a single-ear connecting rod 42 with an opening upward at a V-shaped angle, and the angle is not less than 90 degrees, preferably in the range of 120 to 175 degrees. In some embodiments, one end of the double-ear connecting rod 41 includes two spaced-apart separation bearing seats 411 and the other end of the double-ear connecting rod 41 is a first double-ear connecting structure 412, specifically a pin connecting hole, one end of the single-ear connecting rod 42 includes a combined bearing seat 421 that can accommodate two bearings and the other end of the single-ear connecting rod 42 is a second double-ear connecting structure 422, specifically a pin connecting hole, the double-ear connecting rod 41 and the single-ear connecting rod 42 are connected to the first eccentric shaft and the second eccentric shaft through corresponding bearings and bearing seats at an angle of not less than 90 degrees, so that the two extend from both sides of the eccentric shaft, and the combined bearing seat 421 is located between the separation bearing seats 411.

[0055] In some embodiments, the double-ear connecting rod 41 and the single-ear connecting rod 42 on the same eccentric shaft extend to both sides and are respectively connected to a swing plate 5 through a double-ear connecting structure, each swing plate 5 is connected to a first hydraulic cylinder 61 and a second hydraulic cylinder 62, each first hydraulic cylinder 61 is connected to an outer tamping pick arm 71, and each second hydraulic cylinder 62 is connected to an inner tamping pick arm 72. The tamping device includes four connecting rods 41, 42, i.e., two single-ear connecting rods and two double-ear connecting rods, four swing plates 5, four first hydraulic cylinders 61 and four second hydraulic cylinders 62, and four outer tamping pick arms 71 and four inner tamping pick arms 72. Two tamping pick actuating ends are installed under each tamping pick arm, i.e., a total of 16 tamping pick actuating ends. Figure 1 As shown, the main body is roughly located above the rail 92, 8 tamping pick arm execution ends are located on one side of the rail 92 and the other 8 tamping pick arm execution ends are located on the other side of the rail 92. For the multiple sleepers 912, 913, 914, 915, 16 tamping pick execution ends are responsible for two adjacent sleepers 913, 914, that is, 8 tamping pick execution ends are used to clamp the ballast on both sides of the sleeper 913, and the other 8 tamping pick execution ends are used to clamp the ballast on both sides of the sleeper 914.

[0056] Although not shown, the tamping vehicle may include at least one tamping device according to an embodiment, for example, comprising two Figure 1The tamping device shown is used to perform tamping operations on the rails on both sides at the same time. In some embodiments, the tamping operation vehicle includes: a mobile mode, in which the hydraulic lifting device drives the tamping device to rise to a predetermined height along the guide column 93, for example, the lower end of each tamping pick is higher than the sleeper, and the tamping operation vehicle walks on the rails. The driving device, that is, the variable frequency motor, can be turned off or operated at a lower frequency, which can reduce the energy consumption and noise of the entire tamping device. When the predetermined operating position is reached, the tamping operation vehicle can execute the lowering mode. In the lowering mode, the tamping operation vehicle stops or travels at a low speed, and the driving device is a variable frequency motor, which works at a first frequency to vibrate the outer tamping pick arm 71 and the inner tamping pick arm 72, and the hydraulic lifting device drives the tamping device to descend along the guide column 93, so that the tamping picks of the outer tamping pick arm 71 and the inner tamping pick arm 72 are inserted into the ballast. When the insertion reaches a predetermined depth, the tamping vehicle can execute a tamping clamping mode, in which the tamping vehicle stops or travels at a low speed, the driving device, i.e., the variable frequency motor, operates at a first frequency or a second frequency to vibrate the outer tamping pick arm 71 and the inner tamping pick arm 72, the hydraulic lifting device stops, and the first hydraulic cylinder 61 and the second hydraulic cylinder 62 work, i.e., the first hydraulic cylinder 61 and the second hydraulic cylinder 62 are extended by hydraulic oil to drive the outer tamping pick arm 71 and the inner tamping pick arm 72 to compact the ballast. In some embodiments, the first frequency is higher than the second frequency. Properly reducing the vibration frequency in the tamping clamping mode can better maintain the stability of the ballast and improve the construction quality. In some embodiments, the first frequency is between 30 and 45 Hz, the second frequency is between 25 and 40 Hz, or the first frequency is between 35 and 50 Hz, and the second frequency is between 25 and 40 Hz. In some embodiments, the first frequency is between 30 and 45 Hz, the second frequency is between 25 and 34 Hz ​​or between 36 and 40 Hz, or the first frequency is between 35 and 50 Hz, and the second frequency is between 25 and 34 Hz ​​or between 36 and 40 Hz. In some embodiments, the first hydraulic cylinder 61 and the second hydraulic cylinder 62 may be oil cylinders, which include a piston rod and a piston cylinder, one of which is connected to the swing plate 5, and the other of which is connected to the outer tamping pick arm 71 or the inner tamping pick arm 72.

[0057] According to the device of the embodiment of the present invention, a transmission component composed of a swing plate and a multi-link is used between the eccentric shaft and the first and second hydraulic cylinders. The first and second hydraulic cylinders can be arranged almost horizontally and are no longer directly connected to the eccentric shaft, which improves the stress state of the cylinders, greatly reduces the risk of oil leakage, and is conducive to extending the service life of the hydraulic cylinders and reducing maintenance costs. At the same time, the device of the embodiment of the present invention can provide more design space for comprehensively considering the motion trajectory and stress conditions of the hydraulic cylinders by introducing different angle combinations composed of swing plates and multi-links. The overall layout of the machine is more reasonable, the stress is more uniform, and the maintenance and maintenance of each component are convenient. And further, according to the optimized design of the swing plate, the relative positions between the inner and outer tamping arms on both sides of the swing plate and the first and second hydraulic cylinders can be conveniently adjusted, thereby obtaining a more compact structure.

[0058] In addition, the device according to the embodiment of the present invention changes the operating speed in different modes by controlling the frequency of the variable frequency motor, thereby reducing the energy consumption of the entire operation process of the tamping device and reducing the operating noise. The device according to the embodiment of the present invention provides a nearly horizontally arranged oil cylinder, which is no longer directly connected to the eccentric shaft, improves the stress state of the clamping oil cylinder, and reduces the risk of oil leakage from the oil cylinder. On the one hand, the motor itself is sealed, and no additional sealing treatment is required between the motor and the tamping device, and the structure is simple; on the other hand, when one motor is installed on each side of the tamping device, the symmetrical arrangement is not biased. The device according to the embodiment of the present invention can carry 16 tamping pick execution ends, has a compact structure and a reasonable layout, and can be used to tamp two sleepers at the same time. The device according to the embodiment of the present invention is also easy to maintain and service, and it comprehensively considers the motion trajectory and stress conditions of the hydraulic cylinder to avoid damage to the hydraulic cylinder, and any component replacement and maintenance can be easily carried out.

[0059] The specific embodiments described above in this application are only for more clearly describing the principles of this application, wherein each component is clearly shown or described to make the principles of the present invention easier to understand. Without departing from the scope of this application, those skilled in the art can easily make various modifications or changes to this application. Therefore, it should be understood that these modifications or changes should be included in the scope of patent protection of this application.

Claims

1. A tamping device comprising: A carrier (1), the carrier (1) comprising a main body (11), the main body (11) comprising one or more guide grooves (110) extending longitudinally to connect with a guide column (93), thereby moving in a vertical direction; An eccentric shaft, a non-eccentric section of the eccentric shaft being rotatably mounted to the carrier (1), and the eccentric shaft being rotated along a first axis under the action of a driving device; A plurality of connecting rods (41, 42), one end of each of the connecting rods (41, 42) being rotatably connected to different eccentric sections of the eccentric shaft; A plurality of swing plates (5), each of the swing plates (5) being rotatably connected to the other end of a corresponding connecting rod (41, 42), each of the swing plates (5) comprising: a first position (51) connected to the connecting rod (41, 42), a second position (52) rotatably connected to the carrier (1), and a third position (53) and a fourth position (54) rotatably connected to a first hydraulic cylinder (61) and a second hydraulic cylinder (62), respectively; An outer tamping pick arm (71) and an inner tamping pick arm (72) are rotatably connected to the first hydraulic cylinder (61) and the second hydraulic cylinder (62), respectively; the outer tamping pick arm (71) and the inner tamping pick arm (72) are rotatably connected to the carrier frame (1) and include an execution end for performing a tamping operation.

2. The tamping device according to claim 1, characterized in that The main body (11) comprises a first side (111) and a second side (112) opposite to each other and a first end (113) and a second end (114) opposite to each other, and the first side and the second side of the main body (11) respectively comprise an eccentric shaft bracket for supporting the eccentric shaft, wherein the eccentric shaft comprises a first eccentric shaft (31) and a second eccentric shaft (32) respectively located on the first side and the second side of the main body (11), and the first eccentric shaft (31) and the second eccentric shaft (32) are coaxially arranged.

3. The tamping device according to claim 2, characterized in that The first eccentric shaft (31) and the second eccentric shaft (32) are coaxially rigidly connected via internal and external spline sleeves or a flywheel structure at a through hole (116) of the main body (11) that passes from the first side (111) to the second side (112), wherein the inner hole of the external spline sleeve (82, 83) is connected to the first eccentric shaft (31) and the second eccentric shaft (32) via a flat key, and the external spline of the external spline sleeve (82, 83) is rigidly connected to a flywheel (81) or an internal spline sleeve with an internal spline.

4. The tamping device according to claim 2, characterized in that Each of the eccentric shaft supports comprises: a first half bearing seat (115) at an opposite first side (111) or a second side (112) of the main body (11); an outer bearing support (14) spaced apart from the first side (111) or the second side (112) opposite to the main body (11), the outer bearing support (14) each comprising a second half bearing seat (141); and A bridge member (15), the bridge member (15) comprising a third half bearing seat (151), a fourth half bearing seat (152), and a connecting rod (153) connecting the third half bearing seat (151) and the fourth half bearing seat (152); The first half bearing seat (115) and the third half bearing seat (151) are joined to form a first bearing seat for arranging a first bearing (34), and the second half bearing seat (141) and the fourth half bearing seat (152) are joined to form a second bearing seat for arranging a second bearing (35); The first eccentric shaft (31) and the second eccentric shaft (32) are supported by corresponding first bearings (34) and second bearings (35), respectively.

5. The tamping device according to claim 4, characterized in that The first eccentric shaft (31) and the second eccentric shaft (32) are coaxially connected in the main body (11), and the driving device is a single motor connected to the first eccentric shaft (31) or the second eccentric shaft (32); or the driving device is a first motor (21) and a second motor (22) connected to the first eccentric shaft (31) and the second eccentric shaft (32), and the output shafts of the first motor (21) and the second motor (22) are coaxially connected to the first eccentric shaft (31) and the second eccentric shaft (32), respectively.

6. The tamping device according to claim 1, characterized in that The driving device is a variable frequency motor or a hydraulic motor.

7. The tamping device according to claim 6, characterized in that The variable frequency motor or hydraulic motor is a self-sealed independent motor and is connected to the carrier frame (1) via a flange (20).

8. The tamping device according to claim 4, characterized in that The carrier (1) further comprises: two end plates (12) connected to a first end (113) and a second end (114) of the body (11), respectively; A plurality of swing plate brackets (17) connected to the two end plates (12) and the outer bearing bracket (14); The swing plate bracket (17) comprises: a first wall (171) and a second wall (172) which are parallel to each other, and an intermediate wall (173) connecting the first wall (171) and the second wall (172), wherein the first wall (171) is connected to the middle of both sides of the end plate (12), and the second wall (172) is connected to the outer bearing bracket (14) via a first connecting plate (18) or directly, and the first wall (171) and the second wall (172) comprise pin holes (170) at corresponding positions to arrange a rotating shaft for the swing plate (5).

9. The tamping device according to claim 8, characterized in that The support frame (1) also includes tamping pick arm brackets (16) respectively located outside the two sides of the main body and arranged roughly in parallel, the tamping pick arm bracket (16) including: a tamping pick arm bracket main body (160) located below the first eccentric shaft (31) or the second eccentric shaft (32) and a first hanging arm (161) and a second hanging arm (162) respectively extending upward from both ends of the tamping pick arm bracket main body (160) and respectively connected to the middle wall (173) of the swing plate bracket (17) correspondingly arranged on both sides, the first hanging arm (161) and the second hanging arm (162) or the connection between the first hanging arm (161) and the second hanging arm (162) and the main body (160) each have an outer tamping pick arm mounting hole (163), the tamping pick arm bracket main body (160) has a pair of adjacent inner tamping pick arm mounting holes (164), and the tamping pick arm bracket main body (160) is connected to the lower side of the end plate (12).

10. The tamping device according to claim 9, characterized in that The outer tamping pick arm (71) and the inner tamping pick arm (72) each include: an opposite first end (712, 722) and a second end (713, 723) and a rotation fulcrum (711, 721) rotatably connected to the carrier frame (1) between the first end (712, 722) and the second end (713, 723); the first ends (712, 722) of the outer tamping pick arm (71) and the inner tamping pick arm (72) are rotatably connected to the first hydraulic cylinder (61) and the second hydraulic cylinder (62) respectively; the second ends (713, 723) of the outer tamping pick arm (71) and the inner tamping pick arm (72) constitute execution ends for performing tamping operations.

11. The tamping device according to any one of claims 1 to 10, characterized in that The connecting rods (41, 42) include a double-ear connecting rod (41) and a single-ear connecting rod (42); the eccentric shaft is composed of a first eccentric shaft (31) and a second eccentric shaft (32); the first eccentric shaft (31) and the second eccentric shaft (32) are both connected to a combination consisting of a double-ear connecting rod (41) and a single-ear connecting rod (42); wherein the angle between the double-ear connecting rod (41) and the single-ear connecting rod (42) is not less than 90 degrees; Wherein, one end of the double-ear connecting rod (41) includes two spaced-apart separation bearing seats (411), and the other end of the double-ear connecting rod (41) is a first double-ear connecting structure (412); one end of the single-ear connecting rod (42) includes a combined bearing seat (421) capable of accommodating two bearings, and the other end of the single-ear connecting rod (42) is a second double-ear connecting structure (422); the double-ear connecting rod (41) and the single-ear connecting rod (42) are connected to the eccentric sections of the first eccentric shaft and the second eccentric shaft through corresponding bearings and bearing seats, and the combined bearing seat (421) is located between the separation bearing seats (411); The first double-ear connection structure (412) and the second double-ear connection structure (422) are respectively connected to a swing plate (5), each swing plate (5) is connected to a first hydraulic cylinder (61) and a second hydraulic cylinder (62), each first hydraulic cylinder (61) is connected to an outer tamping pick arm (71), each second hydraulic cylinder (62) is connected to an inner tamping pick arm (72), and the tamping device comprises four connecting rods, four swing plates, four first hydraulic cylinders (61) and four second hydraulic cylinders (62), four outer tamping pick arms (71) and four inner tamping pick arms (72).

12. The tamping device according to any one of claims 1 to 10, characterized in that The angles between the first hydraulic cylinder (61) and the second hydraulic cylinder (62) and the horizontal axis are within the range of -10 to 10 degrees, and the angles between the outer tamping pick arm (71) and the inner tamping pick arm (72) and the vertical axis are within the range of -15 to 15 degrees.

13. The tamping device according to any one of claims 1 to 10, characterized in that The first hydraulic cylinder (61) and the second hydraulic cylinder (62) are equipped with displacement sensors and pressure sensors, thereby accurately controlling the clamping pressure and stroke of the hydraulic cylinders.

14. The tamping device according to any one of claims 1 to 10, characterized in that The driving device is a variable frequency motor, and the tamping device includes a lowering mode and a tamping clamping mode. In the lowering mode, the variable frequency motor operates at a first frequency, the hydraulic lifting device drives the tamping device to descend, and the first hydraulic cylinder (61) and the second hydraulic cylinder (62) do not operate. In the tamping clamping mode, the motor operates at the first frequency or a second frequency lower than the first frequency, the hydraulic lifting device does not operate, and the first hydraulic cylinder (61) and the second hydraulic cylinder (62) extend. wherein the first hydraulic cylinder (61) and the second hydraulic cylinder (62) comprise a piston rod and a piston cylinder, one of the piston rod and the piston cylinder is connected to the swing plate (5), and the other of the piston rod and the piston cylinder is connected to the outer tamping pick arm (71) or the inner tamping pick arm (72); The first frequency is between 30 and 45 Hz, and the second frequency is between 25 and 40 Hz, or the first frequency is between 35 and 50 Hz, and the second frequency is between 25 and 40 Hz.

15. The tamping device according to claim 1, characterized in that The first position (51), the second position (52), the third position (53) and the fourth position (54) of the swing plate (5) are respectively provided with a first opening (501), a second opening (502), a third opening (503) and a fourth opening (504); The swing plate (5) comprises a first portion (55), a second portion (56) and a contracted neck portion (57) between the first portion (55) and the second portion (56); the second opening (502) and the fourth opening (504) are located in the first portion (55); and the first opening (501) and the third opening (503) are located in the second portion (56); The first opening (501) and the third opening (503) are located above the second opening (502), and an angle α between a line connecting a center B of the third opening (503) and a center A of the second opening (502) and a vertical axis V is in a range of -40 to 40 degrees, and an angle β between a line connecting a center C of the first opening (501) and a center A of the second opening (502) and the vertical axis V is in a range of 0 to 60 degrees; The fourth opening (504) is located below the second opening (502) and an angle γ between a line connecting a center D of the fourth opening (504) and a center A of the second opening (502) and a vertical axis V is in the range of -30 to 30 degrees.

16. The tamping device according to claim 15, characterized in that The first opening (501) and the third opening (503) are both located on the side of the eccentric axis of the line connecting the second opening (502) and the fourth opening (504) and away from the line, wherein the distance from the first opening (501) to the second opening (502) is greater than the distance from the third opening (503) to the second opening (502).

17. The tamping device according to claim 15, characterized in that The distance between the first opening (501) and the third opening (503) is greater than the distance between the second opening (502) and the fourth opening (504).

18. A tamping vehicle, characterized in that: include: At least one tamping device as claimed in any one of claims 1 to 17.

19. The tamping vehicle according to claim 18, characterized in that: The tamping operation vehicle comprises: A mobile mode, wherein the tamping device rises to a predetermined height along the guide column (93), the tamping vehicle travels on the rail, and the drive device is a variable frequency motor, which can be turned off or operated at a lower frequency; A downward insertion mode, wherein the tamping vehicle is in a stopped or low-speed running state, the driving device is a variable frequency motor, and the variable frequency motor operates at a first frequency to vibrate the outer tamping pick arm (71) and the inner tamping pick arm (72), and the hydraulic lifting device drives the tamping device to descend along the guide column (93), so that the second ends (713, 723) of the outer tamping pick arm and the inner tamping pick arm are inserted into the ballast; and A tamping clamping mode, wherein the tamping vehicle is in a stopped or low-speed running state, after the tamping device is driven down to a preset position, the hydraulic lifting device stops working, the variable frequency motor works at a first frequency or a second frequency lower than the first frequency to vibrate the outer tamping pick arm (71) and the inner tamping pick arm (72), and the first hydraulic cylinder (61) and the second hydraulic cylinder (62) work to drive the second ends (713, 723) of the outer tamping pick arm (71) and the inner tamping pick arm (72) to compact the ballast; The first frequency is between 30 and 45 Hz, and the second frequency is between 25 and 40 Hz, or the first frequency is between 35 and 50 Hz, and the second frequency is between 25 and 40 Hz.

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