Electrically-driven double-pillow ramming device and ramming operation control method

Abstract

The application discloses an electric driving double-cushion tamping device and a tamping operation control method, and relates to the field of railway line maintenance, aiming to solve the problem that the double-cushion tamping device cannot quickly change the eccentric shaft rotating speed to adjust the vibration frequency. The lifting driving device is arranged on the top of the box body, the guide column is arranged through the box body along the height direction of the box body, so that the box body moves up and down along the guide column, the vibration driving mechanism comprises a first motor and a second motor which are symmetrically arranged on the two sides of the box body, the output end of the first motor is connected with a first eccentric shaft, the output end of the second motor is connected with a second eccentric shaft, the first eccentric shaft and the second eccentric shaft are both installed on the bearing seat of the box body through bearings, one end of the opening and closing driving device is connected with the first eccentric shaft and the second eccentric shaft through bearings, and the other end is connected with a pick arm through a pin shaft, the pick arm is hinged with the box body and is provided with a tamping pick at the bottom, and the lifting driving device, the vibration driving mechanism and the opening and closing driving device are all connected with a control device.

Description

Technical Field

[0001] This invention relates to the field of railway line maintenance technology, and more specifically, to an electrically driven double-sleeper tamping device and a tamping operation control method. Background Technology

[0002] Tamping is one of the main tasks in the maintenance of ballast railway tracks. It can effectively restore the geometric parameters of the track, improve the stability of the track bed, and ensure the safety of train operation. The existing double-sleeper tamping device uses a hydraulic motor to drive an eccentric shaft to tampe the inner and outer sides of the rails. The hydraulic system has a slow response speed and a large moment of inertia of the rotating parts, making it impossible to quickly change the speed of the eccentric shaft to adjust the vibration frequency and keep the vibration frequency constant during operation. The operation is also noisy. At the same time, the existing double-sleeper tamping device also has problems such as easy stripping of the lifting cylinder threads, excessive downward insertion angle of the pick arm, and unreasonable control of the clamping amount.

[0003] Therefore, how to solve the problem that the double-pillow tamping device cannot quickly change the eccentric shaft speed to adjust the vibration frequency is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an electrically driven double-pillow tamping device, which sets a first motor and a second motor to drive a first eccentric shaft and a second eccentric shaft respectively, so as to realize different speeds at different stages of the operation, thereby realizing the adjustment of the tamping operation frequency, which can both meet the operation requirements and reduce noise.

[0005] Another objective of this invention is to provide a tamping operation control method including the above-mentioned electric double-pillow tamping device. This method can control the first motor and the second motor to operate at the same speed. Based on the signal feedback from various sensors, the state of the electric double-pillow tamping device can be determined, thereby controlling the speed of the first motor and the second motor to adapt to different tamping operation states. The clamping amount and clamping force can be adjusted according to the track bed state and the amount of track lifted during operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electrically driven double-pillow tamping device includes:

[0008] Box;

[0009] Guide columns are installed through the box along its height direction to allow the box to move up and down along the guide columns.

[0010] The lifting drive device is mounted on the top of the housing via a pin.

[0011] A vibration drive mechanism is installed in the housing. The vibration drive mechanism includes a first motor and a second motor symmetrically arranged on both sides of the housing. The output end of the first motor is connected to a first eccentric shaft, and the output end of the second motor is connected to a second eccentric shaft. Both the first eccentric shaft and the second eccentric shaft are mounted on the bearing seats of the housing through bearings.

[0012] The tensioning and closing drive device has one end connected to the first eccentric shaft and the second eccentric shaft via a bearing, and the other end connected to the pick arm via a pin. A tamping pick is installed at the bottom of the pick arm, and the pick arm is hinged to the box body.

[0013] The lifting drive device, vibration drive mechanism, and opening and closing drive device are all connected to the control device.

[0014] Preferably, the first motor and the second motor are axial flux motors.

[0015] Preferably, the lifting drive device is fixed to the top of the housing by a pin.

[0016] Preferably, the opening and closing drive device is equipped with a pressure sensor and a linear displacement sensor connected to the control device, and the linear displacement sensor is either built-in or external.

[0017] Preferably, the opening and closing drive device includes:

[0018] Cylinder block;

[0019] The piston rod is located inside the cylinder, and the linear displacement sensor is located inside the cylinder, or the linear displacement sensor is located outside the cylinder.

[0020] Preferably, the first eccentric shaft includes:

[0021] The first eccentric section is connected to the opening and closing drive device via a bearing;

[0022] The first concentric section is located at both ends of the first eccentric section. The first concentric section is installed in the bearing housing in the middle of the housing and the bearing housing at the end of the housing via bearings.

[0023] Preferably, the second eccentric shaft includes:

[0024] The second eccentric section is connected to the tensioning and opening drive device via a bearing;

[0025] The second concentric section is located at both ends of the second eccentric section. The second concentric section is installed in the bearing housing in the middle of the housing and the bearing housing at the end of the housing via bearings.

[0026] Preferably, the opening and closing drive device includes:

[0027] The first outward opening and closing drive device has one end connected to the first eccentric section via a bearing, and the other end connected to the pick arm via a pin.

[0028] The first internal tensioning drive device has one end connected to the first eccentric section via a bearing, and the other end connected to the pick arm via a pin.

[0029] The second external opening and closing drive device has one end connected to the second eccentric section via a bearing, and the other end connected to the pick arm via a pin.

[0030] The second internal tensioning drive device has one end connected to the second eccentric section via a bearing, and the other end connected to the pick arm via a pin.

[0031] Preferably, the pickaxe arm includes:

[0032] The first outer pick arm, one end of which is connected to the first outer opening and closing drive device;

[0033] The first inner pick arm, one end of which is connected to the first inner opening and closing drive device;

[0034] The second outer pick arm, one end of which is connected to the second outer opening and closing drive device;

[0035] The second inner pick arm and one end of the second outer pick arm are connected to the second inner opening and closing drive device.

[0036] Preferably, the tamping pick includes:

[0037] The first outer pick is connected to the other end of the first outer pick arm;

[0038] The first inner pick is connected to the other end of the first inner pick arm;

[0039] The second outer pick is connected to the other end of the second outer pick arm;

[0040] The second inner pick is connected to the other end of the second inner pick arm.

[0041] Preferably, both the housing and the pick arm are equipped with angle sensors to measure the rotation angle of the pick arm. The angle sensors include:

[0042] An external angle sensor is located between the housing and the first external pick arm, and between the housing and the second external pick arm;

[0043] An internal angle sensor is located between the housing and the first internal pick arm, and between the housing and the second internal pick arm.

[0044] Preferably, there are at least two guide columns, and the at least two guide columns are symmetrically arranged in the box body.

[0045] A tamping machine includes two sets of electrically driven double-pillow tamping devices as described in any one of the above.

[0046] Preferably, a pull-wire sensor is installed between the tamping machine and the electric double-pillow tamping device, or a linear displacement sensor is installed on the lifting drive device.

[0047] A tamping operation control method is provided for controlling the electrically driven double-pillow tamping device provided in any of the above-mentioned methods. The tamping operation control method includes:

[0048] The height position of the electric double-pillow tamping device is obtained by a linear displacement sensor to determine the status of the electric double-pillow tamping device.

[0049] Control the electric double-pillow tamping device to operate at a low speed so that the electric double-pillow tamping device is in a ready-to-work state.

[0050] Control the electric double-pillow tamping device to accelerate to a high speed so that the electric double-pillow tamping device is in the lowered insertion state.

[0051] Control the electric double-pillow tamping device to reduce to the optimal clamping speed so that the electric double-pillow tamping device is in the clamping state.

[0052] By acquiring data from sensors, the clamping amount and clamping force of the electric double-pillow tamping device are calculated, and the clamping amount and clamping force are adjusted and controlled according to the track bed condition and the amount of track lifted during operation.

[0053] Preferably, the tamping operation control method further includes: controlling the first motor and the second motor to operate at the same speed, and controlling the rotation phase of the first motor and the second motor so that the positions of the eccentric sections of the eccentric shaft are 180° apart during the rotation.

[0054] The electrically driven double-pillow tamping device provided by this invention includes a housing, guide columns, a lifting drive device, a vibration drive mechanism, and a tensioning drive device. Specifically, the lifting drive device is located at the top of the housing, and the guide columns penetrate the housing along its height. The lifting drive device drives the housing to move up and down along the guide columns. The vibration drive mechanism is located within the housing and is connected to a control device. The control device controls the operation of the vibration drive mechanism. The vibration drive mechanism includes a first motor and a second motor symmetrically arranged on both sides of the housing. The output end of the first motor is connected to a first eccentric shaft, and the output end of the second motor is connected to a second eccentric shaft. Both the first and second eccentric shafts are mounted on the bearing seats of the housing via bearings. One end of the tensioning and closing drive device is connected to the first and second eccentric shafts via bearings. The first motor drives the first eccentric shaft to rotate, and the second motor drives the second eccentric shaft to rotate, thereby driving the tensioning and closing drive device. The other end of the tensioning and closing drive device is connected to the pick arm via a pin. The pick arm is hinged to the housing. The operation of the tensioning and closing drive device drives the pick arm to rotate around the housing, so that the tamping pick forms a clamping action. The lifting drive device, the vibration drive mechanism, and the tensioning and closing drive device are all connected to the control device, which controls the operating status of the three.

[0055] The electric double-pillow tamping device configured in the above manner uses a first motor and a second motor to drive the first eccentric shaft and the second eccentric shaft respectively, so as to realize different speeds at different stages of the operation, thereby adjusting the tamping operation frequency, which can both meet the operation requirements and reduce noise. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0057] Figure 1 A schematic diagram of the structure of the electrically driven double-pillow tamping device provided by the present invention;

[0058] Figure 2 This is a side view of the electrically driven double-pillow tamping device provided by the present invention;

[0059] Figure 3 This is a cross-sectional view of the lifting drive device provided by the present invention;

[0060] Figure 4 This is a schematic diagram of the lifting drive device provided by the present invention;

[0061] Figure 5This is a cross-sectional view of the linear displacement sensor provided by the present invention;

[0062] Figure 6 This is a cross-sectional view of the vibration drive mechanism provided by the present invention;

[0063] Figure 7 This is a flowchart illustrating the steps of the tamping operation control method provided by the present invention;

[0064] Figure 8 This is a schematic diagram of the tamping machine provided by the present invention.

[0065] Figures 1-8 In the accompanying drawings, the reference numerals include:

[0066] 1-Box body, 11-Middle bearing seat of box body, 12-End bearing seat of box body;

[0067] 2-Guide post;

[0068] 3- Lifting drive device;

[0069] 4-Vibration drive mechanism, 41-First motor, 42-Second motor, 43-First eccentric shaft, 431-First eccentric segment, 432-First concentric segment, 44-Second eccentric shaft, 441-Second eccentric segment, 442-Second concentric segment;

[0070] 5-Opening and closing drive device, 51-Cylinder body, 52-Piston rod, 53-First external opening and closing drive device, 54-First internal opening and closing drive device, 55-Second external opening and closing drive device, 56-Second internal opening and closing drive device;

[0071] 6- Pickaxe arm, 61- First outer pickaxe arm, 62- First inner pickaxe arm, 63- Second outer pickaxe arm, 64- Second inner pickaxe arm;

[0072] 7-Pounding pick, 71-First outer pounding pick, 72-First inner pounding pick, 73-Second outer pounding pick, 74-Second inner pounding pick;

[0073] 8-Linear displacement sensor;

[0074] 9 - Angle sensing device, 91 - External angle sensor, 92 - Internal angle sensor. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] The core of this invention is to provide an electrically driven double-pillow tamping device. By setting a first motor 41 and a second motor 42 to drive a first eccentric shaft 43 and a second eccentric shaft 44 respectively, different speeds can be used at different stages of the operation, thereby adjusting the tamping operation frequency, which can both meet the operation requirements and reduce noise.

[0077] Another core aspect of this invention is to provide a tamping operation control method including the above-mentioned electric double-pillow tamping device. This method can control the first motor 41 and the second motor 42 to operate at the same speed. Based on the signal feedback from various sensors, the state of the electric double-pillow tamping device can be determined, thereby controlling the speed of the first motor 41 and the second motor 42 to adapt to different tamping operation states. The clamping amount and clamping force can also be adjusted according to the track bed state and the amount of track lifted during operation.

[0078] Please refer to Figure 1 and Figure 2 An electrically driven double-pillow tamping device includes a housing 1, a guide column 2, a lifting drive device 3, a vibration drive mechanism 4, and a tensioning drive device 5.

[0079] Specifically, the lifting drive device 3 is located at the top of the housing 1, and the guide column 2 is installed through the housing 1 along its height direction. The lifting drive device 3 drives the housing 1 to move up and down along the guide column 2. The vibration drive mechanism 4 is located in the housing 1, and its operation is controlled by a control device. The vibration drive mechanism 4 includes a first motor 41 and a second motor 42 symmetrically arranged on both sides of the housing 1. The output end of the first motor 41 is connected to the first eccentric shaft 43, and the output end of the second motor 42 is connected to the second eccentric shaft 44. Both the first eccentric shaft 43 and the second eccentric shaft 44 are mounted on the bearing seats of the housing 1 via bearings. One end of the tension-opening drive device 5 is connected to the first eccentric shaft 43 and the second eccentric shaft 44 via bearings. The first motor 41 drives the first eccentric shaft 43 to rotate, and the second motor 42 drives the second eccentric shaft 44 to rotate, thereby driving the tension-opening drive device 5 to operate. The other end of the tension-opening drive device 5 is connected to the pick arm 6 via a pin. The pick arm 6 is hinged to the housing 1. The operation of the tension-opening drive device 5 drives the pick arm 6 to rotate around the housing 1, so that the tamping pick 7 forms a clamping action. The lifting drive device 3, the vibration drive mechanism 4, and the tension-opening drive device 5 are all connected to the control device, which controls the operating status of the three.

[0080] It should be noted that in this embodiment, using two motors reduces the power, size, and weight of a single motor, thereby improving the reliability of motor installation and extending the service life of the motor.

[0081] The electric double-pillow tamping device configured in the above manner uses a first motor 41 and a second motor 42 to drive a first eccentric shaft 43 and a second eccentric shaft 44 respectively, so as to achieve different speeds at different stages of the operation, thereby adjusting the tamping operation frequency, which can both meet the operation requirements and reduce noise.

[0082] In the above embodiments, the first motor 41 and the second motor 42 are axial flux motors.

[0083] It should be noted that the first motor 41 and the second motor 42 are axial flux motors, which ensures that the vertical impact force when the tamping device is inserted will not affect the air gap of the first motor 41 and the second motor 42, thus avoiding damage to the first motor 41 and the second motor 42.

[0084] Please refer to Figure 3 and Figure 4 The lifting drive device 3 is fixed to the top of the housing 1 by a pin.

[0085] Understandably, the top of the housing 1 has an interface for connecting the lifting drive device 3. This invention employs a pin connection method, with a single lug on the lifting drive device 3 and a U-shaped structure on the housing 1, connecting the two via a pin. The single lug is equipped with a spherical bearing to accommodate non-parallelism during lifting and lowering caused by manufacturing or installation differences. Compared to existing structures using threaded ball bearings, this invention's structure is simpler and more reliable, requiring no clearance adjustment, eliminating the risk of thread stripping due to the absence of threaded connections.

[0086] Please refer to Figure 5 The opening and closing drive device 5 is equipped with a pressure sensor and a linear displacement sensor 8 connected to the control device. The linear displacement sensor 8 can be built-in or external.

[0087] It should be noted that the tensioning drive device 5 is equipped with a pressure sensor and a linear displacement sensor 8. The pressure sensor measures the clamping pressure of the tamping pick 7, and the linear displacement sensor 8 measures the clamping stroke.

[0088] There are no restrictions on the way the opening and closing drive device 5 obtains the clamping stroke. The clamping stroke can also be obtained by setting an ultrasonic sensor or a laser sensor on the opening and closing drive device 5.

[0089] In the above embodiments, the opening and closing drive device 5 includes a cylinder 51 and a piston rod 52. The piston rod 52 is disposed inside the cylinder 51, and the linear displacement sensor 8 is disposed inside the cylinder 51, or the linear displacement sensor 8 is disposed outside the cylinder 51.

[0090] It should be noted that the linear displacement sensor 8 can be installed inside or outside the tensioning and opening drive device 5. When the tensioning and opening drive device 5 generates telescopic movement, the linear displacement sensor 8 can measure the telescopic movement of the tensioning and opening drive device 5, thereby calculating the displacement of the lower end of the tamping pick 7.

[0091] In practical applications, there are no restrictions on the installation location and type of the linear displacement sensor 8, as long as the aforementioned technical effects can be achieved.

[0092] In the above situation, the first eccentric shaft 43 includes a first eccentric section 431 and a first concentric section 432. The first eccentric section 431 is connected to the opening and closing drive device 5 through bearings. The first concentric section 432 is disposed at both ends of the first eccentric section 431. The first concentric section 432 is installed in the bearing seat 11 in the middle of the housing and the bearing seat 12 at the end of the housing through bearings.

[0093] It is understandable that the first eccentric section 431 is directly connected to the tensioning drive device 5 through a bearing, and the power output by the first motor 41 is transmitted to the tensioning drive device 5 through the first eccentric section 431 to control the operating state of the tensioning drive device 5.

[0094] Furthermore, the second eccentric shaft 44 includes a second eccentric section 441 and a second concentric section 442. The second eccentric section 441 is connected to the opening and closing drive device 5 through bearings. The second concentric section 442 is disposed at both ends of the second eccentric section 441. The second concentric section 442 is mounted on the bearing seat 11 in the middle of the housing and the bearing seat 12 at the end of the housing through bearings.

[0095] It should be noted that the second eccentric section 441 is directly connected to the tensioning drive device 5 through a bearing. The power output by the second motor 42 is transmitted to the tensioning drive device 5 through the second eccentric section 441 to control the operating state of the tensioning drive device 5.

[0096] In the above embodiment, the opening and closing drive device 5 includes a first outer opening and closing drive device 53, a second outer opening and closing drive device 55, a first inner opening and closing drive device 54, and a second inner opening and closing drive device 56. One end of the first outer opening and closing drive device 53 is connected to the first eccentric section 431 via a bearing, and the other end of the first outer opening and closing drive device 53 is connected to the pick arm 6 via a pin. One end of the first inner opening and closing drive device 54 is connected to the first eccentric section 431 via a bearing, and the other end of the first inner opening and closing drive device 54 is connected to the pick arm 6 via a pin. One end of the second outer opening and closing drive device 55 is connected to the second eccentric section 441 via a bearing, and the other end of the second outer opening and closing drive device 55 is connected to the pick arm 6 via a pin. One end of the second inner opening and closing drive device 56 is connected to the second eccentric section 441 via a bearing, and the other end of the second inner opening and closing drive device 56 is connected to the pick arm 6 via a pin.

[0097] Understandably, the first outer opening and closing drive device 53, the second outer opening and closing drive device 55, the first inner opening and closing drive device 54, and the second inner opening and closing drive device 56 work together to move the pick arm 6. Each of the first outer opening and closing drive device 53, the second outer opening and closing drive device 55, the first inner opening and closing drive device 54, and the second inner opening and closing drive device 56 is equipped with a linear displacement sensor 8. The linear displacement sensor 8 can measure the extension and retraction of the first outer opening and closing drive device 53, the second outer opening and closing drive device 55, the first inner opening and closing drive device 54, and the second inner opening and closing drive device 56, thereby calculating the displacement of the lower end of the tamping pick 7, i.e., the clamping amount of the tamping operation.

[0098] Based on the above embodiment, the pick arm 6 includes a first outer pick arm 61, a second outer pick arm 63, a first inner pick arm 62, and a second inner pick arm 64. One end of the first outer pick arm 61 is connected to the first outer opening and closing drive device 53, one end of the first inner pick arm 62 is connected to the first inner opening and closing drive device 54, one end of the second outer pick arm 63 is connected to the second outer opening and closing drive device 55, and one end of the second outer pick arm 63 is connected to the second inner opening and closing drive device 56.

[0099] It should be noted that the first outer pick arm 61, the second outer pick arm 63, the first inner pick arm 62, and the second inner pick arm 64 are provided with hinge points in the middle and are hinged to the box body 1. They can rotate around the box body 1 so that the tamping picks 7 can form a clamping action relative to each other. In the existing structure, the initial angle of the first outer pick arm 61 and the first inner pick arm 62, the second outer pick arm 63, and the second inner pick arm 64 after installation is about 8°-9°. In this embodiment, it is adjusted to 0°-3° so that when the tamping pick 7 is inserted, the angle between the axis of the tamping pick 7 and the vertical direction is smaller, so as to reduce the impact resistance and stress on the tamping when the tamping pick 7 is inserted.

[0100] In the above embodiment, the tamping pick 7 includes a first outer tamping pick 71, a second outer tamping pick 73, a first inner tamping pick 72, and a second inner tamping pick 74. The first outer tamping pick 71 is connected to the other end of the first outer pick arm 61, the first inner tamping pick 72 is connected to the other end of the first inner pick arm 62, the second outer tamping pick 73 is connected to the other end of the second outer pick arm 63, and the second inner tamping pick 74 is connected to the other end of the second inner pick arm 64.

[0101] Understandably, the installation angles of the first outer pick arm 61 and the first inner pick arm 62, the second outer pick arm 63 and the second inner pick arm 64 have been adjusted compared to the existing structure. This results in a smaller angle between the axis of the first outer pick 71, the second outer pick 73, the first inner pick 72 and the second inner pick 74 when they are inserted, thereby reducing the impact resistance and stress on the first outer pick 71, the second outer pick 73, the first inner pick 72 and the second inner pick 74 when they are inserted.

[0102] In a preferred embodiment, both the housing 1 and the pick arm 6 are provided with angle sensing devices 9 to measure the rotation angle of the pick arm 6. The angle sensing device 9 includes an outer angle sensor 91 and an inner angle sensor 92. The outer angle sensor 91 is disposed between the housing 1 and the first outer pick arm 61, and between the housing 1 and the second outer pick arm 63. The inner angle sensor 92 is disposed between the housing 1 and the first inner pick arm 62, and between the housing 1 and the second inner pick arm 64.

[0103] It should be noted that when the first outer pick arm 61, the first inner pick arm 62, the second outer pick arm 63, and the second inner pick arm 64 rotate relative to the housing 1, the rotation angle can be measured by the inner angle sensor 92 and the outer angle sensor 91, thereby calculating the displacement of the lower ends of the first outer pick 71, the second outer pick 73, the first inner pick 72, and the second inner pick 74. Thus, the relative displacement of the first outer pick 71, the second outer pick 73, the first inner pick 72, and the second inner pick 74 can be calculated, i.e., the clamping amount of the tamping operation.

[0104] Please refer to Figure 1 , Figure 4 and Figure 5 At least two guide pillars 2 are provided, and at least two guide pillars 2 are symmetrically arranged on the box body 1.

[0105] It is understandable that the guide column 2 passes through the box 1 in a vertical direction, so that the tamping device as a whole can move up and down along the guide column 2.

[0106] Based on the above embodiments, a pull-wire sensor is provided between the tamping machine and the electric double-pillow tamping device, or a linear displacement sensor 8 is provided on the lifting drive device.

[0107] It should be noted that a wire sensor is also installed between the tamping vehicle and the box 1, or a linear displacement sensor 8 is installed in the lifting drive device 3 to obtain the height position of the tamping pick 7, so as to determine whether the device is in the work preparation state, the insertion state, or the clamping state, and thus control the operation state of the device through the control device.

[0108] A tamping operation control method is provided for controlling the electrically driven double-pillow tamping device provided in any of the above-mentioned methods. The tamping operation control method includes:

[0109] Step S1: Obtain the height position of the electric double-pillow tamping device through the linear displacement sensor 8 to determine the status of the electric double-pillow tamping device.

[0110] Step S2: Control the electric double-pillow tamping device to operate at a low speed so that the electric double-pillow tamping device is in the work preparation state.

[0111] Step S3: Control the electric double-pillow tamping device to accelerate to a high speed so that the electric double-pillow tamping device is in the lowered insertion state.

[0112] Step S4: Control the electric double-pillow tamping device to reduce to the optimal clamping speed so that the electric double-pillow tamping device is in the clamping state.

[0113] Step S5: By acquiring data from the sensors, calculate the clamping amount and clamping force of the electric double-pillow tamping device for tamping operations, and adjust the controlled clamping amount and clamping force according to the track bed condition and the amount of track lifted during operation.

[0114] Specifically, the height position of the electric double-pillow tamping device is obtained through the linear displacement sensor 8 to determine its status. The control device controls the first motor 41 and the second motor 42 to operate at the same speed. The electric double-pillow tamping device operates at a low speed during preparation, accelerates to a high speed during insertion, and then reduces to the optimal clamping speed during clamping after insertion into the ballast. During lifting, the speed further decreases to the low speed state of preparation. The preparation speed is lower than the optimal clamping speed, which is lower than the insertion speed. The lower preparation speed aims to reduce noise from the electric double-pillow tamping device; the lower the speed, the lower the vibration frequency, and the less noise generated. The optimal clamping speed is the speed most conducive to ballast flow and compaction. The higher insertion speed facilitates insertion; the higher the speed, the higher the vibration frequency of the tamping pick 7, which is more conducive to penetrating the ballast. The optimal clamping speed is typically around 2100 r / min. By acquiring data from sensors, the clamping amount and clamping force of the tamping operation are calculated. The clamping amount and clamping force are adjusted according to the condition of the track bed and the amount of track lifted during the operation, so that the track is compacted and the compaction is uniform after tamping.

[0115] Furthermore, the tamping operation control method also includes controlling the first motor 41 and the second motor 42 to operate at the same speed, and controlling the rotation phase of the first motor 41 and the second motor 42 so that the positions of the eccentric sections of the eccentric shaft are 180° apart during the rotation process.

[0116] It should be noted that the rotational speed and phase of the first motor 41 and the second motor 42 are obtained in real time by the sensors built into the first motor 41 and the second motor 42. The control device controls the first motor 41 and the second motor 42 to operate at the same speed, so that the vibration frequency of the electric drive double pillow tamping device is uniform. Furthermore, the rotational phase of the first motor 41 and the second motor 42 is controlled so that the eccentric section of the eccentric shaft is 180° to each other during the rotation, thereby reducing the vibration of the housing 1.

[0117] In summary, the electric double-pillow tamping device provided by the present invention obtains the height position of the tamping device through a sensor. The sensor can be a wire sensor, with one end fixed to the tamping vehicle and the other end fixed to the housing 1 of the tamping device; or a linear displacement sensor 8 can be installed in the lifting drive device 3 to measure the extension distance of the lifting drive device 3. The height position of the tamping device is used to determine whether the tamping device is in the work preparation state, the insertion state, or the clamping state, thereby controlling the motor to run at different speeds through the control device.

[0118] In addition to the electrically driven double-pillow tamping devices disclosed in the above embodiments, the present invention also provides a tamping vehicle including the above-described electrically driven double-pillow tamping device, such as... Figure 8 As shown, each tamping machine is equipped with two sets of electrically driven double-sleeper tamping devices. One set tamps the track bed on both sides of the left rail, and the other set tamps the track bed on both sides of the right rail. The speed of the first motor 41 and the second motor 42 is controlled by a control device under different operating conditions to unify the vibration frequency and reduce the noise generated by the tamping machine during tamping operations. The structure of other parts of the tamping machine can be found in existing technology and will not be described in detail here.

[0119] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0120] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0121] The foregoing has provided a detailed description of the tamping machine and the electrically driven double-pillow tamping device provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electrically driven double-pillow tamping device, characterized in that, include: Box (1); A guide column (2) is provided through the box (1) along the height direction of the box (1) so that the box (1) can move up and down along the guide column (2); A lifting drive device (3) is located on the top of the housing (1); A vibration drive mechanism (4) is provided in the housing (1). The vibration drive mechanism (4) includes a first motor (41) and a second motor (42) provided on both sides of the housing (1). The output end of the first motor (41) is connected to the first eccentric shaft (43), and the output end of the second motor (42) is connected to the second eccentric shaft (44). The first eccentric shaft (43) and the second eccentric shaft (44) are both mounted on the bearing seat of the housing (1) by bearings. Tensioning and closing drive device (5), one end of the tensioning and closing drive device (5) is connected to the first eccentric shaft (43) and the second eccentric shaft (44) through the bearing, the other end of the tensioning and closing drive device (5) is connected to the pick arm (6) through the pin, the bottom of the pick arm (6) is equipped with a tamping pick (7), and the pick arm (6) is hinged to the box body (1). The lifting drive device (3), the vibration drive mechanism (4), and the opening and closing drive device (5) are all connected to the control device; The first eccentric shaft (43) includes: The first eccentric section (431) is connected to the opening and closing drive device (5) via the bearing; The first concentric section (432) is located at both ends of the first eccentric section (431). The first concentric section (432) is installed in the bearing seat (11) in the middle of the housing and the bearing seat (12) at the end of the housing through the bearing. The second eccentric shaft (44) includes: The second eccentric section (441) is connected to the opening and closing drive device (5) via the bearing; The second concentric section (442) is located at both ends of the second eccentric section (441). The second concentric section (442) is installed in the middle bearing seat (11) of the housing and the end bearing seat (12) of the housing through the bearing.

2. The electrically driven double-pillow tamping device according to claim 1, characterized in that, The first motor (41) and the second motor (42) are axial flux motors.

3. The electrically driven double-pillow tamping device according to claim 2, characterized in that, The lifting drive device (3) is fixed to the top of the housing (1) by a pin.

4. The electrically driven double-pillow tamping device according to claim 3, characterized in that, The opening and closing drive device (5) is equipped with a pressure sensor and a linear displacement sensor (8) connected to the control device. The linear displacement sensor (8) is either built-in or external.

5. The electrically driven double-pillow tamping device according to claim 4, characterized in that, The opening and closing drive device (5) includes: Cylinder block (51); The piston rod (52) is located inside the cylinder (51), and the linear displacement sensor (8) is located inside the cylinder (51), or the linear displacement sensor (8) is located outside the cylinder (51).

6. The electrically driven double-pillow tamping device according to claim 1, characterized in that, The opening and closing drive device (5) includes: The first external opening and closing drive device (53) has one end connected to the first eccentric section (431) via the bearing, and the other end connected to the pick arm (6) via the pin. The first internal tensioning drive device (54) has one end connected to the first eccentric section (431) via the bearing, and the other end connected to the pick arm (6) via the pin. The second external opening and closing drive device (55) has one end connected to the second eccentric section (441) via the bearing, and the other end connected to the pick arm (6) via the pin. The second internal tensioning drive device (56) has one end connected to the second eccentric section (441) via the bearing, and the other end connected to the pick arm (6) via the pin.

7. The electrically driven double-pillow tamping device according to claim 6, characterized in that, The pick arm (6) includes: The first outer pick arm (61) has one end connected to the first outer opening and closing drive device (53); The first inner pick arm (62) has one end connected to the first inner opening and closing drive device (54); The second outer pick arm (63) has one end connected to the second outer opening and closing drive device (55); The second inner pick arm (64) has one end connected to the second inner opening and closing drive device (56).

8. The electrically driven double-pillow tamping device according to claim 7, characterized in that, The tamping pick (7) includes: The first outer pick (71) is connected to the other end of the first outer pick arm (61); The first inner tamping pick (72) is connected to the other end of the first inner pick arm (62); The second outer pick (73) is connected to the other end of the second outer pick arm (63); The second inner tamping pick (74) is connected to the other end of the second inner pick arm (64).

9. The electrically driven double-pillow tamping device according to claim 8, characterized in that, Both the housing (1) and the pick arm (6) are equipped with angle sensing devices (9) to measure the rotation angle of the pick arm (6). The angle sensing device (9) includes: An external angle sensor (91) is disposed between the housing (1) and the first external pick arm (61), and between the housing (1) and the second external pick arm (63); An inner angle sensor (92) is disposed between the housing (1) and the first inner pick arm (62), and between the housing (1) and the second inner pick arm (64).

10. The electrically driven double-pillow tamping device according to claim 9, characterized in that, At least two guide posts (2) are provided, and at least two guide posts (2) are symmetrically arranged on the box body (1).

11. A tamping machine, characterized in that, It includes two sets of electrically driven double-pillow tamping devices as described in any one of claims 1-10.

12. The tamping machine according to claim 11, characterized in that, A pull-wire sensor is provided between the tamping vehicle and the electric double-pillow tamping device, or a linear displacement sensor (8) is provided on the lifting drive device (3).

13. A tamping operation control method for controlling the electrically driven double-pillow tamping device provided in any one of claims 1-10, characterized in that, The tamping operation control method includes: The height position of the electric double-pillow tamping device is obtained by the linear displacement sensor (8) to determine the state of the electric double-pillow tamping device. The electric-driven double-pillow tamping device is controlled to operate at a low speed so that the electric-driven double-pillow tamping device is in a ready-to-work state. Control the electric-driven double-pillow tamping device to accelerate to a high speed so that the electric-driven double-pillow tamping device is in the lowered insertion state; Control the electric-driven double-pillow tamping device to reduce to the optimal clamping operating speed so that the electric-driven double-pillow tamping device is in the clamping state; By acquiring data from the sensors, the clamping amount and clamping force of the electric double-pillow tamping device for tamping operations are calculated, and the clamping amount and clamping force are adjusted and controlled according to the track bed condition and the amount of track lifted during operation.

14. The tamping operation control method according to claim 13, characterized in that, The tamping operation control method further includes: controlling the first motor (41) and the second motor (42) to operate at the same speed, and controlling the rotation phase of the first motor (41) and the second motor (42) so that the positions of the eccentric sections of the eccentric shaft are 180° apart during the rotation process.

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