Grinding wheel automatic compensation device and track milling and grinding vehicle

Abstract

The present application relates to track maintenance equipment technical field, specifically disclose a kind of automatic compensation device of grinding wheel, it includes: fixed frame, first oil cylinder, control valve, adjusting cylinder and height sensing arm.First oil cylinder is arranged on fixed frame, and the first support piece below its one end is located in first oil cylinder and is provided with first piston, and the other end is provided with grinding wheel milling machine, and first piston divides first oil cylinder inside into first upper oil cavity and first lower oil cavity;Control valve is arranged on the side of first oil cylinder, and control valve is communicated with first upper oil cavity and first lower oil cavity by pipeline, and valve plate is slidably arranged in control valve to control the on-off of pipeline;Adjusting cylinder is equipped with the guide that cross-sectional area changes along axial direction and push-pull disc contacted with the side of guide in, and push-pull disc is linked with valve plate by push-pull rod.Height sensing arm is connected between guide and track upper end surface.The present application has the advantages that grinding wheel wear and track height variation can be compensated in real time and automatically.

Description

Technical Field

[0001] This invention relates to the field of track maintenance equipment technology, and in particular to an automatic grinding wheel compensation device and a track milling machine. Background Technology

[0002] Trains rely on tracks to move, which are generally composed of steel rails. The stable movement of a train depends on indicators such as the surface roughness and smoothness of the steel rails. However, when a train is running at high speed, the steel rails will experience wear and defects, requiring the use of a track milling machine for repair.

[0003] For rail milling, existing technology uses a rail milling machine, which mainly involves mounting a special grinding wheel on the machine. The machine travels along the rail, driving the grinding wheel to achieve milling. However, the grinding wheel wears down continuously during operation, causing a reduction in its outer diameter. If this wear is not compensated for in a timely manner, it will severely affect the milling effect and rail accuracy.

[0004] Existing automatic grinding wheel compensation devices have several shortcomings. Firstly, some devices are not well-coordinated and cannot adjust in real time, resulting in slow compensation responses and an inability to accurately compensate based on grinding wheel wear, leading to poor milling results. Secondly, while some existing technologies can achieve automatic grinding wheel compensation, their coordination is poor, and they rely on pressure sensors for detection and control, resulting in a high failure rate during operation, affecting the normal operation and lifespan of the equipment. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of the present invention is to provide an automatic grinding wheel compensation device and a track milling machine, which has the advantages of being able to compensate for grinding wheel wear and track height changes in real time and automatically.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: On one hand, the present invention provides an automatic grinding wheel compensation device, which includes: Fixture; The first oil cylinder is mounted on the fixed frame. A first support member is provided below the first oil cylinder. One end of the first support member is located inside the first oil cylinder and is provided with a first piston. A grinding wheel milling machine is provided at the other end of the first support member. The first piston divides the interior of the first oil cylinder into a first upper oil chamber and a first lower oil chamber. A control valve is provided on one side of the first oil cylinder. The control valve has a connecting channel. The two ends of the connecting channel are respectively connected to the first upper oil chamber and the first lower oil chamber through pipes. A valve plate is slidably provided inside the control valve. The valve plate is used to control the opening and closing of the connecting channel. An adjusting cylinder is provided with a guide and a push-pull plate inside. The cross-sectional area of ​​the guide varies along the axial direction of the guide. The inner side of the push-pull plate contacts the circumferential side of the guide. The outer side of the push-pull plate is connected to the valve plate through a push-pull rod. A height sensing arm, one end of which is connected to the guide member, and the other end of which is in contact with the upper surface of the track.

[0007] Compared to existing technologies, this application provides stable support for the entire system by setting up a fixed frame; the first hydraulic cylinder, in conjunction with the first support component, the first piston, and the grinding wheel milling machine, utilizes hydraulic principles to provide basic power for adjusting the grinding wheel height; the design of the control valve, its connecting channel, and the valve plate allows for flexible control of the opening and closing of the first upper and lower oil chambers, achieving initial adjustment of the grinding wheel height; the guide component with an axially varying cross-sectional area inside the adjusting cylinder contacts the push-pull plate, converting minute positional changes caused by track height variations or grinding wheel wear into movement of the push-pull plate, which then drives the valve plate to move precisely via the push-pull rod; the height sensing arm senses changes in the height of the upper end face of the track in real time and transmits this information to the guide component, enabling the device to respond promptly to track height fluctuations. The coordinated action of the overall structure allows for precise, timely, and automatic compensation of the grinding wheel height, ensuring the stability and high quality of track milling operations.

[0008] As a preferred embodiment of the present invention, the valve plate is provided with a through hole, and when the valve plate is pushed to a specific position by the push-pull rod, the through hole is connected to the communicating channel.

[0009] Using the above scheme, the valve plate is provided with a through hole. When the push rod pushes the valve plate to a specific position, the through hole on the valve plate connects with the connecting channel, so that an oil passage is formed between the first upper oil chamber and the first lower oil chamber, thereby changing the position of the first piston and realizing the adjustment of the grinding wheel height. In this way, the connection control between the first upper oil chamber and the first lower oil chamber can be more flexible and precise.

[0010] As a preferred embodiment of the present invention, the adjusting cylinder is provided with a guide rod and a guide frame. The guide frame is connected to the inner wall of the adjusting cylinder, the guide rod is connected to the guide member, and the guide frame is provided with a guide through hole corresponding to the guide rod. The guide rod is slidably inserted through the guide through hole into the guide frame.

[0011] By adopting the above-mentioned scheme, the guide rod and guide frame can provide precise guidance for the movement of the guide component and the push-pull plate, ensure stable contact between the push-pull plate and the guide component, ensure that the guide component and the push-pull plate move in the predetermined direction, and improve the accuracy and reliability of the device movement.

[0012] In a preferred embodiment of the present invention, the adjusting cylinder is fitted with an adjusting ring, the position of which corresponds to the position of the push-pull plate. The adjusting ring has an adjusting cavity on the side near the adjusting cylinder. The adjusting cylinder is provided with a push-pull opening corresponding to the push-pull plate. The end of the push-pull plate away from the guide member passes through the push-pull opening and is placed in the adjusting cavity. The adjusting ring is provided with an adjusting hole corresponding to the push-pull plate. The end of the push-pull rod near the push-pull plate is connected to the push-pull plate through the adjusting hole. A reset pre-tightening member is fitted on the push-pull rod. One end of the reset pre-tightening member is in contact with the push-pull plate, and the other end is in contact with the adjusting ring.

[0013] By adopting the above scheme, the setting of the adjusting ring and the reset pre-tightening component can further precisely control the movement of the push-pull plate and enable the valve plate to quickly reset after movement, ensuring the stability and repeatability of the device.

[0014] As a preferred embodiment of the present invention, the guide member is a conical guide member or a frustum-shaped guide member, and the push-pull plate is a fan-shaped push-pull plate.

[0015] By adopting the above scheme, when the conical guide or frustum-shaped guide undergoes vertical displacement due to changes in track height, the axial change in its cross-sectional area alters the contact position with the fan-shaped push-pull plate, thereby pushing the push-pull plate to move horizontally. This, in turn, drives the valve plate to move via the push-pull rod. In this way, changes in track height can be more sensitively sensed and transmitted, effectively improving the response speed and adjustment accuracy of the device.

[0016] As a preferred embodiment of the present invention, the height sensing arm includes a first sensing arm, one end of which is connected to the guide member, and the other end is provided with a first sensing wheel that contacts and connects with the upper surface of the track.

[0017] By adopting the above scheme, through the setting of the first sensing arm and the first sensing wheel, when the track height changes, the first sensing wheel moves up and down accordingly, driving the first sensing arm and the guide to move, which can more directly and accurately sense the height change of the upper surface of the track.

[0018] As a preferred embodiment of the present invention, it further includes an overall height adjustment device, which is disposed on the fixed frame and connected to the upper end face of the track. The overall height adjustment device is used to adjust the height of the fixed frame according to the change in the height of the track.

[0019] By adopting the above scheme, when the track height changes, the overall height adjustment device senses the change and adjusts the height of the fixed frame accordingly, thereby driving the overall height of the grinding wheel milling machine to change, realizing the adjustment of the grinding wheel height, further enhancing the device's adaptability to changes in track height, and improving the stability of milling operations.

[0020] As a preferred embodiment of the present invention, the overall height adjustment device includes: A housing, wherein the bottom wall of the housing has an opening; The second oil cylinder is located inside the housing and connected to the housing. A second support member is provided below the second oil cylinder. One end of the second support member is located inside the second oil cylinder and is provided with a second piston. The other end is connected to the fixed frame. The second piston divides the internal space of the second oil cylinder into a second upper oil chamber and a second lower oil chamber. The third oil cylinder is located inside the housing and connected to the housing. A second sensing arm is provided below the third oil cylinder. One end of the second sensing arm is located inside the third oil cylinder and is provided with a third piston. The other end is provided with a second sensing wheel that is in contact with and connected to the upper end surface of the track. The third piston divides the internal space of the third oil cylinder into a third upper oil chamber and a third lower oil chamber. The second upper oil chamber is connected to the third lower oil chamber via a pipe, and the second lower oil chamber is connected to the third upper oil chamber via a pipe.

[0021] By employing the above-mentioned scheme, the height of the fixed frame is precisely adjusted using the hydraulic principle through the cooperation of the second and third hydraulic cylinders, the second sensing arm, and the second sensing wheel, thereby enabling timely adjustment of the height of the grinding wheel.

[0022] In a preferred embodiment of the present invention, the grinding wheel mill is located between the height sensing arm and the second sensing arm.

[0023] With the above-mentioned scheme, the grinding wheel milling machine is positioned between the height sensing arm and the second sensing arm. This layout allows the device to more comprehensively and accurately perceive height changes at different positions on the track. The height sensing arm can sense the height changes of the milled track behind the grinding wheel, ensuring real-time and automatic height compensation of the grinding wheel. The second sensing arm can sense the height changes of the unmilled track in front of the grinding wheel, thus enabling timely and automatic adjustment of the grinding wheel height based on the height changes of the unmilled track. Through the synergistic effect of the two, more comprehensive information is provided for grinding wheel height compensation, allowing the grinding wheel milling machine to make more precise height adjustments based on the actual track conditions, thereby improving the accuracy and comprehensiveness of grinding wheel height compensation.

[0024] On the other hand, the present invention provides a track milling vehicle, including a vehicle body, wherein the vehicle body is provided with the above-mentioned automatic grinding wheel compensation device.

[0025] Compared with existing technologies, this application improves the automation level and quality of track milling by installing an automatic grinding wheel compensation device on the track milling machine. During the track milling operation, the automatic grinding wheel compensation device automatically adjusts the grinding wheel height according to the changes in track height and the wear of the grinding wheel itself, effectively improving the automation level and quality of the track milling machine, reducing manual intervention, and increasing work efficiency.

[0026] The above-mentioned automatic grinding wheel compensation device and track milling machine have the following beneficial effects: The height sensing arm accurately senses changes in track height in real time and quickly transmits the signal, linking the internal structure of the regulating cylinder. Utilizing the cooperation of guide components and a push-pull plate, the valve plate's movement is precisely controlled, enabling flexible flow of hydraulic oil in the upper and lower chambers of the first cylinder. This allows for rapid and precise automatic adjustment of the grinding wheel height, thus enabling real-time monitoring of grinding wheel diameter changes. This ensures the stability and uniformity of track milling operations, achieving consistent height on the track's upper surface after milling and significantly improving track milling quality. Furthermore, the overall height adjustment device can promptly adjust the overall height of the grinding wheel milling machine and the mounting frame based on the height of the unmilled track, further improving milling efficiency and precision. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of the automatic compensation device for grinding wheels according to the present invention; Figure 2 This is a schematic diagram of the structure of the first support member in an automatic compensation device for grinding wheels according to the present invention; Figure 3 This is a schematic diagram of the control valve in an automatic compensation device for grinding wheels according to the present invention; Figure 4 This is a schematic diagram of the valve plate in an automatic compensation device for grinding wheels according to the present invention; Figure 5 This is a schematic diagram of the internal structure of the adjusting cylinder in an automatic compensation device for grinding wheels according to the present invention; Figure 6 for Figure 5 A magnified view of a portion of point A in the middle; Figure 7 This is a schematic diagram of the structure of a second embodiment of an automatic grinding wheel compensation device according to the present invention; Figure 8 This is a top view of Embodiment 2 of the automatic compensation device for grinding wheels according to the present invention; Figure 9 This is a schematic diagram of the internal structure of an embodiment two of the automatic compensation device for grinding wheels according to the present invention; In the diagram: 1. Fixed frame; 2. First hydraulic cylinder; 21. First piston; 22. First upper oil chamber; 23. First lower oil chamber; 3. First support component; 4. Grinding wheel milling machine; 5. Control valve; 51. Connecting channel; 52. Valve plate; 53. Through hole; 6. Adjusting cylinder; 61. Guide component; 62. Push-pull plate; 63. Guide rod; 64. Guide frame; 65. Guide through hole; 66. Adjusting ring; 67. Adjusting cavity; 68. Push-pull port; 69. Adjusting hole 7. Height sensing arm; 71. First sensing arm; 72. First sensing wheel; 8. Reset pre-tightening component; 9. Overall height adjustment device; 901. Housing; 902. Second hydraulic cylinder; 903. Second support component; 904. Second upper hydraulic chamber; 905. Second lower hydraulic chamber; 906. Third hydraulic cylinder; 907. Second sensing arm; 908. Second sensing wheel; 909. Third upper hydraulic chamber; 910. Third lower hydraulic chamber; 10. Track; 11. Push-pull rod.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and easier to understand, the present invention will be described in detail below with reference to the accompanying drawings and several embodiments.

[0033] Example 1 Reference Figures 1 to 6 In one aspect, this invention provides an automatic grinding wheel compensation device for automatically compensating for the height of the grinding wheel during track milling operations. This adapts to changes in track height and grinding wheel diameter due to wear, ensuring milling quality. The device includes a fixed frame 1, a first hydraulic cylinder 2, a control valve 5, an adjusting cylinder 6, and a height sensing arm 7. The first hydraulic cylinder 2 is bolted to the fixed frame 1. A first support member 3 is located below the first hydraulic cylinder 2. In this embodiment, the first support member 3 is a support rod. One end of the first support member 3 extends into the first hydraulic cylinder 2 and is fitted with a first piston 21 by screws. The first piston 21 divides the interior of the first hydraulic cylinder 2 into a first upper oil chamber 22 and a first lower oil chamber 23. A grinding wheel milling machine 4 is bolted to the other end of the first support member 3. The grinding wheel milling machine 4 is used for milling the upper surface of the track 10. The grinding wheel milling machine 4 includes a milling motor and a grinding wheel. The milling motor is bolted to the first support member 3. The grinding wheel is driven by the drive shaft of the milling motor. It is worth noting that the drive shaft of the milling motor and the grinding wheel are connected using a conventional transmission connection method in the art to achieve the driving of the grinding wheel by the milling motor. Specifically, a key connection, a flexible coupling, or other similar connection methods can be used to achieve power transmission between the two. These connection methods are well known to those skilled in the art and can stably and reliably transmit the rotational power of the milling motor to the grinding wheel, meeting the basic requirements of this device for driving the grinding wheel. It is important to emphasize that the specific transmission connection method is not within the scope of protection of this application. Those skilled in the art can easily implement and debug this connection method based on existing technology, and can flexibly select other suitable conventional connection methods according to actual needs.

[0034] A control valve 5 is located on one side of the first hydraulic cylinder 2. The control valve 5 has a connecting channel 51, with its two ends connected to the first upper oil chamber 22 and the first lower oil chamber 23 respectively via copper pipes. A valve plate 52 is slidably mounted inside the control valve 5, and a through hole 53 is formed on the valve plate 52. The sliding of the valve plate 52 controls the opening and closing of the connecting channel 51, thereby controlling the flow of hydraulic oil between the first upper oil chamber 22 and the first lower oil chamber 23. Specifically, the valve body of the control valve 5 has a guide groove machined inside to fit the valve plate 52. This guide groove extends along the sliding direction of the valve plate 52, and its dimensional accuracy and surface roughness are strictly controlled to ensure that the valve plate 52 can slide smoothly within it. The edge of the valve plate 52 fits tightly against the side wall of the guide groove, ensuring sliding stability while effectively preventing media leakage. In addition, optionally, to reduce the frictional resistance during the sliding process of the valve plate 52, an appropriate amount of grease is applied to the guide groove, which further improves the flexibility and reliability of the sliding of the valve plate 52.

[0035] The adjusting cylinder 6 is bolted to the fixing frame 1. A guide member 61 and a push-pull plate 62 are disposed inside the adjusting cylinder 6. The cross-sectional area of ​​the guide member 61 gradually changes along its axial direction, for example, it is conical or frustum-shaped. In this embodiment, the guide member 61 is frustum-shaped. The push-pull plate 62 is placed on one side of the guide member 61. In this embodiment, the push-pull plate 62 is fan-shaped, and its inner surface contacts the circumferential side of the guide member 61. A push-pull opening 68 is provided on the adjusting cylinder 6 at the position corresponding to the push-pull plate 62. An adjusting ring 66 is fitted on the adjusting cylinder 6 at the position corresponding to the push-pull plate 62, forming an adjusting cavity 67 between the adjusting ring 66 and the adjusting cylinder 6. The end of the push-pull plate 62 away from the guide member 61 passes through the push-pull opening 68 and is placed in the adjusting cavity 67. It is worth noting that the size of the push-pull opening 68 should be larger than the push-pull plate 62 to ensure... The push-pull plate 62 can move smoothly in the horizontal direction under the action of the guide member 61. In order to achieve the balance of the guide member 61, two push-pull plates 62 are designed. The two push-pull plates 62 are on the same straight line to ensure the balance of the guide member 61 during movement. At the same time, the height of the push-pull port 68 should correspond to the height of the push-pull plate 62 to avoid the end of the push-pull plate 62 that contacts the guide member 61 moving upward when the guide member 61 moves upward, thus preventing the push-pull plate 62 from being unable to move horizontally and thus unable to change the position of the valve plate 52. The adjusting ring 66 has an adjusting hole 69 corresponding to the position of the push-pull plate 62. The outer side of the push-pull plate 62 is connected to the valve plate 52 through the push-pull rod 11. Inside the adjusting cylinder 6, there is also a guide rod 63 and a guide frame 64. The guide frame 64 is installed on the inner wall of the adjusting cylinder 6 by screws. The guide rod 63 is welded to the top wall of the guide member 61. A guide through hole 65 is opened on the guide frame 64 corresponding to the position of the guide rod 63. The end of the guide rod 63 away from the guide member 61 is slidably inserted through the guide through hole 65 into the guide frame 64. A reset pre-tightening member 8 is sleeved on the push-pull rod 11. The reset pre-tightening member 8 is located between the push-pull plate 62 and the adjusting ring 66. In this embodiment, the reset pre-tightening member 8 is a pressure spring. One end of the reset pre-tightening member 8 abuts against the outer side of the push-pull plate 62, and the other end abuts against the adjusting ring 66.

[0036] The height sensing arm 7 includes a first sensing arm 71 and a first sensing wheel 72. One end of the first sensing arm 71 is connected to the guide member 61 by bolts, and the other end is fitted with the first sensing wheel 72 by bolts. The first sensing wheel 72 is in contact with the upper surface of the track 10 and is used to sense the height change of the upper surface of the track 10 in real time.

[0037] In this embodiment, the fixing frame 1 can be bolted to a working device such as a track milling machine. In other embodiments, the fixing frame 1 can also be fixed to the working device by welding, as long as the fixing frame 1 can be stably installed on the working device. The specific connection method between the fixing frame 1 and the working device is not limited here. The first hydraulic cylinder 2 can also be installed to the fixing frame 1 by welding, as long as the first hydraulic cylinder 2 is stably installed on the fixing frame 1. Similarly, the connection method between the components can be flexibly selected according to actual needs, such as snap-fit, riveting, etc., as long as a stable connection between the components and the function can be achieved.

[0038] The working principle of this embodiment is as follows: When the height of the track 10 changes, the first sensing wheel 72 of the height sensing arm 7 moves up and down with the change in the height of the track 10, driving the first sensing arm 71 and the guide member 61 to move. Since the guide member 61 is a conical or frustum-shaped guide member, its cross-sectional area changes along the axial direction. The movement of the guide member 61 causes the push-pull plate 62 to slide horizontally in the adjustment cavity 67. The push-pull plate 62 drives the valve plate 52 to slide in the control valve 5 through the push-pull rod 11. When the valve plate 52 slides to connect the through hole 53 with the connecting channel 51, the hydraulic oil between the first upper oil chamber 22 and the first lower oil chamber 23 can flow. The first piston 21 moves under the action of hydraulic oil pressure, driving the grinding wheel milling machine 4 to move up and down through the first support member 3, realizing automatic compensation for the height of the grinding wheel to adapt to the change in the diameter of the grinding wheel caused by wear, and ensuring the stability and quality of the track milling operation.

[0039] Example 2 Reference Figures 7 to 9 Based on Embodiment 1, this embodiment adds an overall height adjustment device 9, which is used to pre-adjust the height of the track 10 before the automatic compensation device of the grinding wheel is working, thereby further improving the efficiency and accuracy of the milling operation.

[0040] The overall height adjustment device 9 includes a housing 901, a fixing frame 1 located inside the housing 901 and connected to the housing 901 by bolts, and an opening at the bottom of the housing 901. The grinding wheel milling machine 4 and the first induction wheel 72 contact the upper end face of the track 10 through the opening at the bottom of the housing 901. A second hydraulic cylinder 902 is provided inside the housing 901 and is connected to the housing 901 by bolts. A second support member 903 is provided below the second hydraulic cylinder 902. One end of the second support member 903 extends into the second hydraulic cylinder 902 and a second piston (not shown) is installed thereon by screws. The other end is connected to the fixing frame 1 by bolts. The second piston (not shown) divides the interior of the second hydraulic cylinder 902 into a second upper oil chamber 904 and a second lower oil chamber 905.

[0041] A third hydraulic cylinder 906 is also installed inside the housing 901. The third hydraulic cylinder 906 is connected to the housing 901 by bolts, and its structure is similar to that of the second hydraulic cylinder 902. A second sensing arm 907 is connected below the third hydraulic cylinder 906. A third piston (not shown) is installed at one end of the second sensing arm 907 by screws, and a second sensing wheel 908 is installed at the other end of the second sensing arm 907 by bolts. The second sensing wheel 908 is in contact with the upper end face of the track 10. The interior of the third hydraulic cylinder 906 is divided into a third upper oil chamber 909 and a third lower oil chamber 910 by the third piston (not shown). The second upper oil chamber 904 is connected to the third lower oil chamber 910 by a copper pipe, and the second lower oil chamber 905 is connected to the third upper oil chamber 909 by a copper pipe. The grinding wheel milling machine 4 is located between the height sensing arm 7 and the second sensing arm 907.

[0042] In this embodiment, the housing 901 can be bolted to a working device such as a track milling machine. In other embodiments, the housing 901 can also be fixed to the working device by welding, as long as the housing 901 can be stably installed on the working device. The specific connection method between the fixing frame 1 and the working device is not limited here. The fixing frame 1 and the housing 901 can also be installed by welding, as long as the overall height adjustment device 9 is stably installed on the fixing frame 1. The second hydraulic cylinder 902 and the third hydraulic cylinder 906 can also be installed to the housing 901 by welding or other methods. The specific connection method can be selected according to the actual situation.

[0043] The working principle of this embodiment is as follows: The second sensing wheel 908 senses the height of the upper end face of the unmilled track 10 in real time. When there is a difference between the height of the unmilled track 10 and the height of the track where the grinding wheel milling machine 4 is currently located, for example, when the height of the unmilled track 10 is higher than the height of the track where the grinding wheel milling machine 4 is currently located, the second sensing wheel 908 of the second sensing arm 907 will move upward as the height of the track 10 changes, driving the third piston (not shown) to move upward. The hydraulic oil in the third upper oil chamber 909 is transported to the second lower oil chamber 905 by compression, thereby realizing the upward movement of the second support member 903, achieving the effect of raising and adjusting the fixed frame 1, and thus achieving the purpose of raising and adjusting the grinding wheel.

[0044] Example 3 In another aspect, the present invention provides a track milling vehicle, including a vehicle body on which the automatic grinding wheel compensation device described in Embodiment 1 or Embodiment 2 is installed.

[0045] The working principle of this invention is as follows: This automatic grinding wheel compensation device can simultaneously compensate for the height of the grinding wheel in two ways during operation. Firstly, when there is a change in height on the unmilled track 10 in front of the grinding wheel, for example, when the height of the unmilled track 10 surface increases, the second sensing arm 907, connected to the second sensing wheel 908, moves vertically upwards, causing the third piston in the third cylinder 906 to move upwards. The hydraulic oil in the upper third oil chamber 909 is then compressed and transported to the lower second oil chamber 905. The second support member 903 moves upward, achieving the effect of raising and adjusting the fixed frame 1, thereby achieving the purpose of raising and adjusting the grinding wheel; conversely, when the height of the unmilled track 10 surface in front of the grinding wheel decreases, the vertical downward movement of the second sensing arm 907 causes the third piston in the third oil cylinder 906 to move downward, and the hydraulic oil in the third lower oil chamber 910 is squeezed and transported to the second upper oil chamber 904, thereby achieving the effect of lowering and adjusting the fixed frame 1, thereby achieving the purpose of lowering and adjusting the grinding wheel.

[0046] Secondly, regarding the adjustment of the grinding wheel diameter after milling operations have been performed for a period of time, an adjusting cylinder 6 is specifically installed on the fixed frame 1. The adjusting cylinder 6 contains a frustum-shaped guide 61 and a fan-shaped push-pull plate 62. The lower end of the frustum-shaped guide 61 is connected to a first sensing arm 71, which is connected to a first sensing wheel 72. By monitoring the contact between the first sensing wheel 72 and the upper surface of the track 10, the change in the grinding wheel diameter can be monitored in real time. The principle is that when the grinding wheel diameter decreases, the contact position between the first sensing wheel 72 and the track 10 changes. Specifically, the milling depth on the track 10 becomes shallower, leading to the... The position of the induction wheel 72 is raised, and the grinding wheel is almost suspended due to the smaller diameter. Due to gravity, the first lower oil chamber 23 in the first oil cylinder 2 is subjected to the squeezing force from the first piston 21. The first induction wheel 72 lifts the frustum-shaped guide 61 through the first support member 3. The rise of the frustum-shaped guide 61 will push the fan-shaped push-pull plate 62 towards the adjustment chamber 67, and drive the valve plate 52 to move through the push-pull rod 11. After the through hole 53 and the connecting channel 51 on the valve plate 52 coincide or partially coincide, the first upper oil chamber 22 and the first lower oil chamber 23 are connected. At this time, due to gravity, the first piston 21 moves down, realizing the lowering compensation operation of the grinding wheel.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An automatic compensation device for grinding wheels, characterized in that, include: Fixture; The first oil cylinder is mounted on the fixed frame. A first support member is provided below the first oil cylinder. One end of the first support member is located inside the first oil cylinder and is provided with a first piston. A grinding wheel milling machine is provided at the other end of the first support member. The first piston divides the interior of the first oil cylinder into a first upper oil chamber and a first lower oil chamber. A control valve is provided on one side of the first oil cylinder. The control valve has a connecting channel. The two ends of the connecting channel are respectively connected to the first upper oil chamber and the first lower oil chamber through pipes. A valve plate is slidably provided inside the control valve. The valve plate is used to control the opening and closing of the connecting channel. An adjusting cylinder is provided with a guide and a push-pull plate inside. The cross-sectional area of ​​the guide varies along the axial direction of the guide. The inner side of the push-pull plate contacts the circumferential side of the guide. The outer side of the push-pull plate is connected to the valve plate through a push-pull rod. A height sensing arm, one end of which is connected to the guide member, and the other end of which is in contact with the upper surface of the track.

2. The automatic grinding wheel compensation device according to claim 1, characterized in that, The valve plate is provided with a through hole. When the valve plate is pushed to a specific position by the push-pull rod, the through hole is connected to the connecting channel.

3. The automatic grinding wheel compensation device according to claim 1, characterized in that: The adjusting cylinder is provided with a guide rod and a guide frame. The guide frame is connected to the inner wall of the adjusting cylinder, and the guide rod is connected to the guide member. The guide frame has a guide through hole corresponding to the guide rod, and the guide rod is slidably inserted through the guide through hole into the guide frame.

4. The automatic grinding wheel compensation device according to claim 1, characterized in that: The adjusting cylinder is fitted with an adjusting ring, the position of which corresponds to the position of the push-pull plate. The adjusting ring has an adjusting cavity on the side near the adjusting cylinder. The adjusting cylinder is provided with a push-pull opening corresponding to the push-pull plate. The end of the push-pull plate away from the guide member passes through the push-pull opening and is placed in the adjusting cavity. The adjusting ring is provided with an adjusting hole corresponding to the push-pull plate. The end of the push-pull rod near the push-pull plate is connected to the push-pull plate through the adjusting hole. A reset pre-tightening member is fitted on the push-pull rod. One end of the reset pre-tightening member is in contact with the push-pull plate, and the other end is in contact with the adjusting ring.

5. The automatic grinding wheel compensation device according to claim 1, characterized in that: The guide is a conical guide or a frustum-shaped guide, and the push-pull plate is a fan-shaped push-pull plate.

6. The automatic grinding wheel compensation device according to claim 1, characterized in that: The height sensing arm includes a first sensing arm, one end of which is connected to the guide member, and the other end is provided with a first sensing wheel that contacts and connects with the upper surface of the track.

7. The automatic grinding wheel compensation device according to claim 1, characterized in that: It also includes an overall height adjustment device, which is mounted on the fixed frame and connected to the upper end face of the track. The overall height adjustment device is used to adjust the height of the fixed frame according to the change in the height of the track.

8. The automatic grinding wheel compensation device according to claim 7, characterized in that, The overall height adjustment device includes: A housing, wherein the bottom wall of the housing has an opening; The second oil cylinder is located inside the housing and connected to the housing. A second support member is provided below the second oil cylinder. One end of the second support member is located inside the second oil cylinder and is provided with a second piston. The other end is connected to the fixed frame. The second piston divides the internal space of the second oil cylinder into a second upper oil chamber and a second lower oil chamber. The third oil cylinder is located inside the housing and connected to the housing. A second sensing arm is provided below the third oil cylinder. One end of the second sensing arm is located inside the third oil cylinder and is provided with a third piston. The other end is provided with a second sensing wheel that is in contact with and connected to the upper end surface of the track. The third piston divides the internal space of the third oil cylinder into a third upper oil chamber and a third lower oil chamber. The second upper oil chamber is connected to the third lower oil chamber via a pipe, and the second lower oil chamber is connected to the third upper oil chamber via a pipe.

9. The automatic grinding wheel compensation device according to claim 8, characterized in that: The grinding wheel milling machine is located between the height sensing arm and the second sensing arm.

10. A track milling vehicle, comprising a vehicle body, characterized in that: The vehicle body is equipped with an automatic grinding wheel compensation device as described in any one of claims 1-9.

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