A structure of a pick arm of a ramming device

Abstract

The application discloses a tamping device pick arm structure and relates to the technical field of tamping devices, which comprises a vibrating frame, a vibrating machine, a hydraulic push rod, a vibrating pick arm, a vibrating rod, an oil injection assembly, a supporting assembly and a blocking assembly. The oil injection assembly is arranged near the shaft joint of the vibrating pick arm and the pin shaft and is communicated with the shaft joint hole. The supporting assembly is arranged inside the oil injection assembly. The blocking assembly is fixedly connected with the vibrating pick arm and is attached to the outer wall of the pin shaft. The inertia of the high-frequency vibration of the vibrating pick arm is utilized to drive the oil pushing block in the oil injection assembly to reciprocate in the circular-arc tube. The automatic continuous oil pumping is realized in combination with the one-way baffle. The pin shaft cooperation surface can be continuously supplied with lubricant without external power, and the abrasive particles can be discharged with the oil. The outer end of the pin shaft is synchronously scraped by the blocking assembly to prevent the oil and dust from forming accumulations. The oil pushing block is elastically limited by the supporting assembly, so that the oil injection is stable and reliable, thereby effectively solving the problems of lubrication failure and abrasive wear under the high-frequency vibration working condition and prolonging the service life of the pick arm.

Description

Technical Field

[0001] This invention relates to the field of tamping device technology, specifically a tamping device pick arm structure. Background Technology

[0002] The tamping device achieves compaction of railway ballast through the clamping vibration of paired tamping arms. At the connection between the tamping arm and the vibratory frame, a rotating pair consisting of a pin and a hinge hole is typically used to transmit the enormous clamping force and accommodate high-frequency reciprocating oscillations. This joint operates continuously under harsh conditions of heavy load, high-frequency micro-vibration, and strong impact; good lubrication is a fundamental prerequisite for ensuring its service life and operational reliability. Currently, maintenance of this joint in this field generally relies on manual, periodic application of grease or lubricating oil. A common practice is to install an oil nozzle or oil channel at the hinge hole of the tamping arm leading to the pin mating surface, and for operators to inject lubricant into the pin using a grease gun during tamping machine downtime maintenance. This periodic manual replenishment method has revealed multiple and mutually reinforcing drawbacks in practice.

[0003] First, the high-frequency vibration environment of tamping operations fundamentally undermines the lubricant's retention capacity. The working frequency of the tamping arm typically reaches tens of hertz. Under such intense and continuous mechanical vibration, newly injected grease or oil is quickly shaken out, thrown out, or precipitated from the mating clearances, failing to form a stable load-bearing oil film between the pin and the shaft hole. Actual working conditions show that after a sufficient grease replenishment, the effective lubrication condition often deteriorates rapidly within a very short time at the start of the operation, with the shaft joint actually in a state of boundary lubrication or even dry friction for most of the working time.

[0004] Even more problematic is that the lubricating oil that precipitates and accumulates on the outside of the shaft joint can uncontrollably mix with the large amount of hard particulate pollutants such as rock dust and ballast fragments that permeate the tamping operation environment. The adhesive effect of the oil firmly binds these dust particles, forming a paste-like abrasive mixture on the outer edge of the mating surface. With the slight oscillation of the pin, this mixture is continuously and repeatedly squeezed into the mating gap, acting as a high-hardness abrasive medium, thereby accelerating the wear on the pin and affecting its service life.

[0005] Therefore, a tamping device with a pick arm structure is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a tamping device pick arm structure to solve the problem that the existing lubrication method cannot effectively retain oil under vibration conditions, resulting in oil easily separating and mixing with dust to form abrasive particles and aggravating wear at the shaft joint.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tamping device arm structure, comprising a tamping frame, a vibrator, a hydraulic push rod, a tamping arm, a vibrating rod, an oil injection assembly, a support assembly, and a blocking assembly; the vibrator is installed in the middle of the tamping frame, the tamping arm is axially connected to the pins on both sides of the tamping frame, the hydraulic push rod is installed between the vibrator and the tamping arm, the vibrating rod is fixedly connected to the bottom end of the tamping arm, the oil injection assembly is located near the axial connection between the tamping arm and the pin, the oil injection assembly is connected to the axial connection hole where the tamping arm and the pin are hinged, the oil injection assembly is semi-circular in shape, and its center is the same as that of the pin, the support assembly is located inside the oil injection assembly, the blocking assembly is fixedly connected to the tamping arm, and the blocking assembly is fitted around the outer wall of the pin, during the tamping process, the blocking assembly swings with the tamping arm and rotates slightly with the pin.

[0008] Preferably, the oil injection assembly includes an oil tank, an oil injection channel, a fixing frame, an arc tube, an oil pusher block, an oil channel, a baffle, and a torsion spring; the oil tank is arranged around the middle of the vibratory frame, the oil injection channel is opened inside the vibratory hammer arm and is perpendicular to the pin shaft, the fixing frame is fixedly connected to the vibratory hammer arm, the arc tube is fixedly connected to the fixing frame, the arc of the arc tube is consistent with the arc of a circle and the center of the circle is at the same center as the pin shaft, one end of the arc tube near the oil tank is connected to the oil tank through a connecting pipe and the other end is connected to the oil injection channel through a connecting pipe, the oil pusher block is slidably connected to the inside of the arc tube and has the same arc, the oil channel is opened at the center of the oil pusher block, the baffle is hinged to the end of the oil pusher block away from the oil tank, the torsion spring is arranged on the outer ring of the hinge shaft between the baffle and the oil pusher block, one end of the torsion spring is fixedly connected to the baffle and the other end is fixedly connected to the oil pusher block, the baffle is circular and the center of the circle is at the same center as the cross-section of the oil pusher block.

[0009] Preferably, the side of the baffle that contacts the oil-pushing block is rounded, and the outer cross section of the oil-pushing block is also provided with a groove that matches the rounded corner of the baffle.

[0010] Preferably, the end of the oil pusher block closest to the oil tank is obliquely cut.

[0011] Preferably, both the arc tube and the oil-pushing block are made of metal.

[0012] Preferably, the support assembly includes a fixed ring, an arc-shaped slide rail, and a pull spring; the fixed ring is fixedly connected to the inner wall of the arc-shaped tube, the arc-shaped slide rail is fixedly connected between the fixed ring and the side of the arc-shaped tube near the oil tank, two sets of arc-shaped slide rails are provided and symmetrically arranged around the center of the oil pusher block, the oil pusher block is slidably connected to the arc-shaped slide rail, the arc of the arc-shaped slide rail is consistent with the arc-shaped tube and the oil pusher block, the pull spring is sleeved on the outer side of the arc-shaped slide rail, and the pull spring is fixedly connected between the fixed ring and the oil pusher block, and between the inclined end of the oil pusher block and the side of the arc-shaped tube near the oil tank.

[0013] Preferably, the connection between the arc-shaped pipe and the oil injection channel is located between the fixing ring and the end of the arc-shaped pipe furthest from the oil tank.

[0014] Preferably, the blocking assembly includes a ring frame and a blocking plate; the ring frame is connected to the vibratory tamping arm by bolts, the blocking plate is arranged in multiple ring arrays inside the ring frame, the blocking plate is fixedly connected to the ring frame, the end of the blocking plate near the pin is slidably disposed with the outer peripheral wall of the pin, and the inner side of the blocking plate abuts against the vibratory tamping arm.

[0015] Preferably, the distance between any two sets of the blocking plates is less than or equal to the swing amplitude between the vibratory arm and the pin during the vibratory operation.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by configuring the oil injection assembly as a structure driven by the vibration inertia of the vibratory hammer arm itself, enables the oil pusher block to reciprocate within the arc tube and, combined with a one-way baffle, achieves automatic oil pumping. This achieves continuous, dynamic lubrication of the pin mating surfaces without external power or manual intervention. This not only solves the problem of lubricant not being able to remain and easily forming dry friction under high-frequency vibration conditions, but also allows continuously injected fresh oil to constantly precipitate from the mating gap, flushing away and carrying away intruding hard particulate contaminants. This effectively prevents the accumulation and wear of abrasive particles between the pin and the hammer arm. Simultaneously, the flow of oil can carry away the frictional heat generated by high-frequency vibration, significantly extending the service life of the pin and the vibratory hammer arm.

[0017] 2. This invention utilizes a blocking assembly consisting of a ring frame and a ring array of blocking plates, fixedly connected to the vibratory tamping arm. When the vibratory tamping arm oscillates slightly relative to the pin, the blocking plates scrape against the outer circumferential wall of the pin across its entire range. This effectively disperses and peels away the dust-oil mixture that has been separated from the oil and carried to the outside of the shaft end. This completely solves the problem in existing technologies where oil and dust mix to form a paste-like abrasive ring, which is then repeatedly squeezed into the mating gap, exacerbating wear. This ensures the continuous unobstructed flow of oil through the drainage channel and the self-cleaning capability of the lubrication system. 3. The present invention uses the arc-shaped slide rail of the support component and the symmetrically arranged pull springs to elastically limit and precisely guide the oil pusher block, strictly constraining the reciprocating motion of the oil pusher block within the specified stroke range, avoiding the failure of the baffle to open normally or the blockage of the oil passage caused by the collision of the end of the oil pusher block, and ensuring the consistency of the oil injection volume and the reliability of the pumping function each time. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall appearance of the present invention; Figure 2 This is a top view of the overall appearance of the present invention; Figure 3 This is a schematic diagram showing the location of the support components of the present invention; Figure 4 This is an enlarged structural diagram of the arc-shaped tube of the present invention; Figure 5 This is a schematic diagram of the oil injection assembly and support assembly of the present invention; Figure 6 This is a schematic diagram of the baffle in the open state of the present invention; Figure 7 This is a schematic diagram of the oblique cross-section structure of the oil-pushing block of the present invention; Figure 8 This is a schematic diagram of the blocking component structure of the present invention.

[0019] In the diagram: 1. Vibrating frame; 2. Vibrator; 21. Hydraulic push rod; 3. Vibrating pick arm; 4. Vibrating rod; 5. Oil injection assembly; 51. Oil tank; 52. Oil injection channel; 53. Fixing frame; 54. Arc tube; 55. Oil pusher block; 551. Groove; 56. Oil channel; 57. Baffle; 58. Torsion spring; 6. Support assembly; 61. Fixing ring; 62. Arc slide rail; 63. Pull spring; 7. Blocking assembly; 71. Ring frame; 72. Blocking plate. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 8 The present invention provides a tamping device pick arm structure, the technical solution of which is as follows: Reference Figures 1 to 3A tamping device arm structure includes a tamping frame 1, a vibrator 2, a hydraulic push rod 21, a tamping arm 3, a vibrating rod 4, an oil injection assembly 5, a support assembly 6, and a blocking assembly 7. The vibrator 2 is installed in the middle of the tamping frame 1. The tamping arm 3 is axially connected to pins on both sides of the tamping frame 1. The hydraulic push rod 21 is installed between the vibrator 2 and the tamping arm 3. The vibrating rod 4 is fixedly connected to the bottom end of the tamping arm 3. The oil injection assembly 5 is located near the axial connection between the tamping arm 3 and the pins. The oil injection assembly 5 is connected to the tamping arm... The 3-pin hinge is connected to the shaft connection hole. The oil injection component 5 is semi-circular, and its center is the same as that of the pin. The support component 6 is located inside the oil injection component 5. The blocking component 7 is fixedly connected to the vibratory hammer arm 3, and the blocking component 7 is set to fit around the outer wall of the pin. During vibration, the blocking component 7 swings with the vibratory hammer arm 3 and rotates slightly with the pin. During operation, the hydraulic push rod 21 can drive the vibratory hammer arm 3 to open and close along the pin. When it is necessary to tamp the ballast, the vibrator... 2. The vibratory pick arm 3 is driven by the hydraulic push rod 21 to vibrate (the vibration direction is a left-right swing along the pin shaft). Then, the entire device is lowered so that the paired vibratory rods 4 are inserted into the ballast of the railway track bed. During the descent, the hydraulic push rod 21 drives the vibratory pick arm 3 to move closer together and retract, thereby allowing the vibratory rods 4 to vibrate and compact the ballast. At the same time, during the vibration of the vibratory pick arm 3, the oil injection component 5 continuously and slowly injects oil into the pin shaft where the vibratory pick arm 3 is connected to the vibratory frame 1, so that the pin shaft is covered with a layer of oil film to enhance the lubrication effect. During vibration, the oil will continuously precipitate along the pin shaft, thereby carrying out the oil-mixed particulate matter mixture at the outer end of the pin shaft. This prevents friction between the vibratory hammer arm 3 and the pin shaft due to the particles, effectively extending the service life of both the vibratory hammer arm 3 and the pin shaft. At the same time, the support component 6 ensures that the oil injection component 5 can always maintain a normal oil injection state. The blocking component 7 can disturb the outer ring shaft wall at the outer end of the pin shaft during oil injection, preventing particles from mixing with the oil and adhering to the outer end of the pin shaft to form a continuous adhesion state, which would affect the discharge of the oil injected by the oil injection component 5.

[0022] Reference Figures 4 to 6The oil injection assembly 5 includes an oil tank 51, an oil injection channel 52, a fixing frame 53, an arc-shaped tube 54, an oil pusher 55, an oil channel 56, a baffle 57, and a torsion spring 58. The oil tank 51 is arranged around the middle of the vibrating frame 1. The oil injection channel 52 is opened inside the vibrating hammer arm 3 and is perpendicular to the pin shaft. The fixing frame 53 is fixedly connected to the vibrating hammer arm 3. The arc-shaped tube 54 is fixedly connected to the fixing frame 53. The arc of the arc-shaped tube 54 is consistent with the arc of a circle, and its center is at the same center as the pin shaft. The end of the arc-shaped tube 54 near the oil tank 51 is connected to the oil tank 51 through a connecting pipe. The other end is connected to the oil injection channel 52 via a connecting pipe. The oil pusher block 55 is slidably connected to the arc tube 54 with the same curvature. The oil channel 56 is opened at the center of the oil pusher block 55. The baffle 57 is hinged to the end of the oil pusher block 55 away from the oil tank 51. The torsion spring 58 is set on the outer ring of the hinge shaft between the baffle 57 and the oil pusher block 55. One end of the torsion spring 58 is fixedly connected to the baffle 57 and the other end is fixedly connected to the oil pusher block 55. The baffle 57 is circular and its center is at the same center as the cross-section of the oil pusher block 55. During the reciprocating vibration of the vibrating hammer arm 3 along the pin shaft connected to the vibrating frame 1, the inertia... The action of the vibration will cause the pusher block 55 to move back and forth within the arc tube 54. During vibration, when the bottoms of the vibrating hammer arms 3 approach each other, the pusher block 55 will move towards the oil tank 51 within the arc tube 54. At this time, the oil in the arc tube 54 will push the baffle 57 through the oil channel 56 to open against the force of the torsion spring 58. At this time, the oil on the flat side of the pusher block 55 within the arc tube 54 will increase. When the bottoms of the vibrating hammer arms 3 move away from each other, the pusher block 55 will move away from the oil tank 51 within the arc tube 54. At this time, the baffle 57 will be in a closed state with the oil channel 56, and the baffle 57 will follow the pusher block 55. 5. Under the action of inertial movement, the oil on one side of the oil-pushing block 55 flows into the oil injection channel 52, and then the oil enters the pin. With the high-speed vibration of the vibrating hammer arm 3 and the continuous reciprocating movement of the oil-pushing block 55, the oil can be continuously injected into the pin to form an oil film during the tamping process, which effectively improves lubrication. During the tamping process, the oil will continuously precipitate and carry away the particles from the pin, preventing the particles from causing wear between the pin and the vibrating hammer arm 3. In addition, the continuous and slow injection and outflow of lubricating oil can carry away the heat generated by the vibration of the vibrating hammer arm 3 and the pin, further extending the service life.

[0023] Reference Figure 6The side of the baffle 57 that contacts the oil pusher block 55 is rounded, and the outer cross section of the oil pusher block 55 is also provided with a groove 551 that matches the rounded corner of the baffle 57. Thus, when the baffle 57 and the oil pusher block 55 are closed, the rounded corner of the baffle 57 is evenly embedded in the groove 551, producing an effect similar to a "wedge-shaped sealing ring", which can effectively block the path of lubricating oil leakage outward along the contact surface, and maintain a stable seal even under high-frequency reciprocating motion or pressure fluctuation conditions.

[0024] Reference Figure 7 The end of the oil pusher 55 near the oil tank 51 is obliquely cut. When the obliquely cut end of the oil pusher 55 slides toward the oil tank 51, the oil can enter the oil channel 56 more smoothly along the oblique surface, increasing the amount of oil entering the oil channel 56, and thus making it easier for the oil to push open the baffle 57 and enter the side where the baffle 57 is located.

[0025] Reference Figure 5 Both the arc tube 54 and the oil pusher block 55 are made of metal. The arc tube 54 made of metal can provide higher strength, and the oil pusher block 55 made of metal can make itself heavier, bringing greater inertia, and can smoothly push the oil into the pin.

[0026] Reference Figure 5 The support assembly 6 includes a fixing ring 61, an arc-shaped slide rail 62, and a pull spring 63. The fixing ring 61 is fixedly connected to the inner wall of the arc tube 54. The arc-shaped slide rail 62 is fixedly connected between the fixing ring 61 and the side of the arc tube 54 near the oil tank 51. The arc-shaped slide rail 62 has two sets and is symmetrically arranged around the center of the oil pusher block 55. The oil pusher block 55 is slidably connected to the arc-shaped slide rail 62. The arc of the arc-shaped slide rail 62 is consistent with that of the arc tube 54 and the oil pusher block 55. The pull spring 63 is sleeved on the outside of the arc-shaped slide rail 62 and is fixedly connected between the fixing ring 61 and the oil pusher block 55, as well as between the inclined end of the oil pusher block 55 and the arc tube. Between the side of oil tank 51 and 54; during the movement of the pusher block 55 within the arc tube 54, it will move along the arc slide rail 62. At the same time, when stationary, pulling the spring 63 will apply the same pulling force to both ends of the pusher block 55, so that the pusher block 55 is in the middle position between the fixed ring 61 and the right end of the arc tube 54. Even during the vibration of the vibrating pick arm 3, the pusher block 55 is restricted by the pulling spring 63 to only move back and forth within this range. This can prevent the end of the pusher block 55 baffle 57 from contacting the fixed ring 61, which would affect the opening of the push plate and thus affect the oil injection effect. This ensures that neither the left nor right ends of the pusher block 55 will contact the object, thus ensuring that the amount of oil injected each time is equal.

[0027] Reference Figure 5The connection between the arc pipe 54 and the oil injection channel 52 is located between the fixing ring 61 and the end of the arc pipe 54 away from the oil tank 51. Thus, under the action of the fixing ring 61, the oil pusher 55 can be effectively prevented from moving to the left end of the arc pipe 54, causing blockage at the connection between the arc pipe 54 and the oil injection channel 52, thus affecting the oil injection effect.

[0028] Reference Figure 8 The blocking component 7 includes an annular frame 71 and a blocking plate 72. The annular frame 71 is connected to the vibratory tamping arm 3 by bolts. The blocking plate 72 is arranged in multiple annular arrays inside the annular frame 71. The blocking plate 72 is fixedly connected to the annular frame 71. The end of the blocking plate 72 near the pin shaft is slidably disposed with the outer peripheral wall of the pin shaft, and the inner side of the blocking plate 72 abuts against the vibratory tamping arm 3. During the vibratory tamping arm 3's swinging motion along the pin shaft, the vibratory tamping arm 3 will drive the annular frame 71 and the blocking plate 72 to rotate along the outer peripheral walls at both ends of the pin shaft, causing the contact end of the blocking plate 72 with the pin shaft to continuously scrape, preventing the mixing of particulate matter and oil precipitated at the pin shaft, forming a continuous solid mixture at both ends of the pin shaft, thereby affecting the precipitation of oil injected by the oil injection component 5, ensuring that it will not block and prevent affecting the continuity of the oil pushing block 55 to the oil injection channel 52, and preventing the accumulation of particulate matter and oil mixture, which may enter between the pin shaft and the vibratory tamping arm 3 and cause wear.

[0029] Reference Figure 8 The distance between any two sets of blocking plates 72 is less than or equal to the swing amplitude between the vibrating arm 3 and the pin during the vibrating operation. As a result, during the swing of the vibrating arm 3, the scraping range of the blocking plate 72 can cover the entire range of the outer peripheral wall at both ends of the pin, thereby improving the scraping effect on the mixture of particulate matter and oil.

[0030] Working principle: First, during the tamping operation, the hydraulic push rod 21 drives the vibratory tamping arm 3 to reciprocate around the pin shaft at a high frequency, thereby driving the vibratory rod 4 to clamp and vibrate the ballast for compaction. During this process, the arc-shaped tube 54 fixed on the vibratory tamping arm 3 swings synchronously around the pin shaft, and the metal pusher block 55 slidably disposed inside it generates a relative reciprocating motion in the arc-shaped tube 54 under the action of inertia, which is opposite to the swing direction of the vibratory tamping arm 3. When the bottoms of the vibratory tamping arms 3 approach each other, the oil pusher 55 slides towards the oil tank 51. At this time, its front inclined surface facilitates the oil convergence. The oil enters the oil channel 56 in the center of the oil pusher 55 from the arc tube 54 and pushes open the baffle 57 with the torsion spring 58, allowing the oil to flow into the arc tube 54 chamber on the side where the baffle 57 of the oil pusher 55 is located. Immediately afterwards, when the bottoms of the vibratory tamping arms 3 move away from each other, the oil pusher 55 retracts away from the oil tank 51 under the action of inertia. At this time, the baffle 57 closes tightly under the action of the torsion spring 58 and the oil pressure difference. Its rounded corner surface is embedded in the groove 551 of the oil pusher 55 to form a wedge seal, preventing the oil from flowing back. Thus, the lubricating oil that has been sucked into this side chamber is continuously pushed towards the oil injection channel 52 and finally injected into the shaft joint mating surface between the vibratory tamping arm 3 and the pin. Due to the high-frequency vibration of the vibratory hammer arm 3, this oil suction and discharge process is continuously and automatically cyclical, realizing dynamic continuous lubrication without manual intervention. While the newly injected oil forms an oil film on the pin surface, it continuously precipitates or washes away frictional heat and abrasive particles mixed into the mating gap.

[0031] Then, to ensure the stability and reliability of the oil injection process under vibration conditions, the support component 6 plays a limiting and resetting role: the fixing ring 61 and the arc-shaped slide rail 62 fixed to the inner wall of the arc tube 54 provide precise arc-shaped guidance for the reciprocating sliding of the oil pusher 55, while the pull spring 63 symmetrically connected between the two ends of the oil pusher 55 and the end wall of the arc tube 54 and the fixing ring 61 always applies a balanced pulling force to the two ends of the oil pusher 55 in the static or vibrating state, limiting its range of motion to between the fixing ring 61 and the end of the arc tube 54 near the oil tank 51. This prevents the oil pusher 55 from hitting the fixing ring 61 and causing the baffle 57 to fail to open normally, and also prevents the oil pusher 55 from moving to the connection between the arc tube 54 and the oil injection channel 52, thereby ensuring the consistency of the oil discharge volume each time.

[0032] Finally, the abrasive contaminants formed by the mixture of oil and dust that seeps from the joint gap to the outer periphery of both ends of the pin are cleaned simultaneously by the blocking component 7, which is fixedly connected to the vibratory arm 3: the blocking plates 72 arranged in a ring array on the inner side of the ring frame 71 slide against the outer peripheral wall of the pin, and the distance between adjacent blocking plates 72 is less than or equal to the swing amplitude of the vibratory arm 3; when the vibratory arm 3 drives the blocking component 7 to rotate and swing slightly relative to the pin, the contact end of the blocking plate 72 scrapes the entire outer peripheral wall of the pin, continuously breaking up and peeling off the oil-sludge mixture that is about to form, preventing it from forming a continuously accumulated abrasive ring at the end of the pin, thereby ensuring the smooth flow of oil seepage channels at the joint and preventing hard particles from being squeezed into the mating surface in the opposite direction and causing wear.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tamping device pick arm structure, characterized in that: The system includes a vibratory frame (1), a vibrator (2), a hydraulic push rod (21), a vibratory pick arm (3), a vibratory rod (4), an oil injection assembly (5), a support assembly (6), and a blocking assembly (7). The vibrator (2) is installed in the middle of the vibratory frame (1), the vibratory pick arm (3) is axially connected to the two sides of the vibratory frame (1) by pins, the hydraulic push rod (21) is installed between the vibrator (2) and the vibratory pick arm (3), the vibratory rod (4) is fixedly connected to the bottom end of the vibratory pick arm (3), and the oil injection assembly (5) is installed in the vibratory frame. Near the shaft joint of the pick arm (3) and the pin, the oil injection component (5) is connected to the shaft joint hole of the vibratory pick arm (3) and the pin. The oil injection component (5) is set in a semi-circular arc shape, and its center is the same as that of the pin. The support component (6) is located inside the oil injection component (5). The blocking component (7) is fixedly connected to the vibratory pick arm (3), and the blocking component (7) is set to fit around the outer wall of the pin. During the vibration process, the blocking component (7) swings with the vibratory pick arm (3) and rotates slightly with the pin.

2. The tamping device pick arm structure according to claim 1, characterized in that: The oil injection assembly (5) includes an oil tank (51), an oil injection channel (52), a fixing frame (53), an arc tube (54), an oil pusher (55), an oil channel (56), a baffle (57), and a torsion spring (58). The oil tank (51) is arranged around the middle of the vibrating frame (1). The oil injection channel (52) is opened inside the vibrating pick arm (3) and is perpendicular to the pin. The fixing frame (53) is fixedly connected to the vibrating pick arm (3). The arc tube (54) is fixedly connected to the fixing frame (53). The arc of the arc tube (54) is consistent with the arc of a circle and its center is at the same center as the pin. The arc tube (54) is close to the oil tank. One end of (51) is connected to the oil tank (51) through a connecting pipe, and the other end is connected to the oil injection channel (52) through a connecting pipe. The pusher block (55) is slidably connected to the inside of the arc tube (54) and the arc is consistent. The oil channel (56) is opened at the center of the pusher block (55). The baffle (57) is hinged to the end of the pusher block (55) away from the oil tank (51). The torsion spring (58) is set on the outer ring of the hinge shaft between the baffle (57) and the pusher block (55). One end of the torsion spring (58) is fixedly connected to the baffle (57) and the other end is fixedly connected to the pusher block (55). The baffle (57) is circular and the center of the circle is at the same center as the cross section of the pusher block (55).

3. The tamping device pick arm structure according to claim 2, characterized in that: The side of the baffle (57) that contacts the oil pusher (55) is rounded, and the outer cross section of the oil pusher (55) is also provided with a groove (551) that matches the rounded corner of the baffle (57).

4. The tamping device pick arm structure according to claim 3, characterized in that: The end of the oil pusher (55) near the oil tank (51) is obliquely cut.

5. The tamping device pick arm structure according to claim 4, characterized in that: Both the arc tube (54) and the oil pusher (55) are made of metal.

6. The tamping device pick arm structure according to claim 5, characterized in that: The support assembly (6) includes a fixed ring (61), an arc-shaped slide rail (62), and a pull spring (63). The fixed ring (61) is fixedly connected to the inner wall of the arc tube (54). The arc-shaped slide rail (62) is fixedly connected between the fixed ring (61) and the side of the arc tube (54) near the oil tank (51). The arc-shaped slide rail (62) is provided in two sets and is symmetrically arranged around the center of the oil pusher block (55). The oil pusher block (55) is slidably connected to the arc-shaped slide rail (62). The arc of the arc-shaped slide rail (62) is consistent with that of the arc tube (54) and the oil pusher block (55). The pull spring (63) is sleeved on the outside of the arc-shaped slide rail (62) and is fixedly connected between the fixed ring (61) and the oil pusher block (55), and between the inclined end of the oil pusher block (55) and the side of the arc tube (54) near the oil tank (51).

7. The tamping device pick arm structure according to claim 6, characterized in that: The connection between the arc pipe (54) and the oil injection channel (52) is located between the fixing ring (61) and the end of the arc pipe (54) away from the oil tank (51).

8. The tamping device pick arm structure according to claim 7, characterized in that: The blocking assembly (7) includes a ring frame (71) and a blocking plate (72); the ring frame (71) is connected to the vibratory tamping arm (3) by bolts, and the blocking plate (72) is arranged in multiple ring arrays inside the ring frame (71). The blocking plate (72) is fixedly connected to the ring frame (71), and the end of the blocking plate (72) near the pin is slidably disposed with the outer peripheral wall of the pin, and the inner side of the blocking plate (72) abuts against the vibratory tamping arm (3).

9. The tamping device pick arm structure according to claim 8, characterized in that: The distance between each pair of blocking plates (72) is less than or equal to the swing amplitude between the vibrating arm (3) and the pin during the vibrating operation.

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