For high-speed rail grinding trolley in urban rail transit

Abstract

The present invention discloses a high-speed rail grinding trolley for urban rail transit, which includes a grinding frame for installing and fixing various components for realizing the grinding function. A first lifting mechanism is respectively connected to the vehicle body and the grinding frame to realize the lifting and lowering of the grinding frame and provide a pressing force. In the present invention, a second lifting mechanism enables the grinding beam to be lifted and lowered quickly and reliably; a grinding angle adjustment mechanism realizes precise adjustment and wide coverage of the grinding position on the rail surface; a rotating mechanism realizes rapid rotation and replacement of the grinding stone group and locks it after rotation to ensure the stability of the working state of the grinding beam; symmetrically arranged fourth telescopic members are used to realize the lifting and lowering of the grinding frame, avoiding problems such as device failure and uncontrollable state caused by asynchronism during the lifting and lowering operations; through the cooperation of the suspension assembly and the suspension shaft, the lifted grinding frame is stably placed during high-speed driving, avoiding dangerous situations such as the grinding frame falling on the rail or other situations when the lifting device fails after lifting.

Description

Technical Field

[0001] The present invention relates to the technical field of railway rail grinding mechanisms, and in particular to a high-speed rail grinding trolley for urban rail transit rails. Background Art

[0002] Rail is an important component of urban rail transit, and the quality of its state directly affects the safety, smoothness of the operation of urban rail transit vehicles and the comfort of passengers. Factors such as the dynamic action of the vehicle, the influence of the external environment and the quality of the rail itself will affect the service performance of the rail. In addition to causing wear of the rail profile, various diseases such as fatigue cracks, spalling and corrugation wear will also occur on the rail surface. If the rail surface diseases are not treated in time, it will not only cause the deterioration of the wheel-rail relationship and lead to the damage of the train or track components, but also cause the acceleration of the development of the rail diseases themselves, the shortening of the rail service life, the increase of the operation and maintenance costs, etc. When the rail diseases develop to a certain extent, it will even affect the train operation safety.

[0003] In recent years, with the successive opening of new urban rail transit lines and the increasing annual passenger flow, various diseases of the rail gradually appear during the operation, and it also brings the increasingly serious problem of rail corrugation, which seriously affects the safety and comfort of urban rail transit operation. The main reasons are related to the operation conditions of urban rail transit, such as complex line conditions, many small-radius curves, various types of vibration-damping tracks, frequent acceleration and deceleration of vehicles, large traffic density, high safety requirements, poor maintenance conditions and a large proportion of tunnels. The wavelength of the rail corrugation in urban rail transit is mostly short-wave corrugation below 100 mm, and the vibration impact it brings is intense and the development rate is fast.

[0004] Rail grinding is the most important way of rail maintenance during the service of the rail, and it plays an important role in eliminating rail surface defects, reducing contact stress, controlling damage, improving guidance, reducing noise, improving riding comfort, etc. Rail grinding originated in the 1950s. After decades of development, it has become an effective rail maintenance method recognized by railways around the world. The concept of rail grinding has also developed from the initial only restorative grinding to the current preventive grinding, pre-grinding and other methods.

[0005] The high-speed rail grinding vehicle for urban rail transit is an efficient grinding equipment mainly for preventive grinding and pre-grinding of the rails on urban rail transit lines. When performing rapid rail grinding, the grinding stone is dragged on the rail without power at a certain attack angle for grinding. The high-speed rail grinding vehicle for urban rail transit can effectively remove rail corrugation, surface hardened layer and surface diseases, and its maximum operation speed can reach more than 60 km / h. Compared with the operation speed of less than 10 km / h of the traditional active rail grinding vehicle driven by an electric motor for the grinding stone, the high-speed rail grinding vehicle for urban rail transit has the ability of rapid operation and extremely high operation efficiency.

[0006] The high-speed rail grinding trolley for urban rail transit is a relatively advanced rail grinding device at present. By connecting a grinding frame to the general vehicle body of urban rail transit, it is used to install grinding equipment such as grinding stones. The existing grinding device has poor structural adjustability, low grinding efficiency, and high labor intensity, which is not conducive to the rapid and efficient maintenance of the rail.

[0007] On the one hand, a Chinese patent with the publication number CN110528344A discloses a grinding frame. It uses a multi-link mechanism composed of a working device, a suspension, a telescopic cylinder, and a main frame to achieve the attitude control of the grinding operation. Its disadvantages are as follows: First, it cannot realize the lifting of the grinding device, specifically the lifting of the grinding stone group. Since it does not disclose the function description of lifting, it is impossible to judge the specific control method of the grinding stone group in the working state and the non-working state. Second, the stability of the link mechanism is poor. The link mechanism is a three-degree-of-freedom mechanism. Therefore, in order to accurately control the attitude, higher requirements are needed for the specific setting of the link structure. And due to the error accumulation property of the link mechanism itself, after long-term use, the control effect of its attitude will become worse and worse. Third, the structure is complex. Just to achieve attitude control, three telescopic cylinders are required to participate. Therefore, the cost of the device is relatively high, and the subsequent maintenance and the establishment of the control system are also relatively complex.

[0008] On the other hand, when the grinding frame is connected to the vehicle body, the lifting oil cylinder of the grinding frame and the grinding trolley usually adopt a fixed connection method. This structure does not consider the lateral offset of the grinding trolley relative to the whole vehicle when the grinding trolley passes through a curved track. When passing through a curve, the hydraulic cylinder will bear a large lateral force, which may cause the grinding trolley to derail; this structure cannot accurately monitor and control the grinding pressure and stroke, resulting in a large gap between the actual grinding operation state and the preset state, and it is impossible to achieve a stable and reliable grinding effect. In addition, the lifting operation stability of the device during driving is poor; there is no limit hook device in the traditional grinding trolley lifting device. When the lifting device of the grinding trolley in the non-working lifting state fails during driving, the grinding frame has the risk of falling onto the rail, affecting the operation and line safety. Summary of the Invention

[0009] The purpose of the present invention is to provide a high-speed rail grinding trolley for urban rail transit to solve the following problems in the prior art:

[0010] 1. The operating state and non-operating state of the grinding stone cannot be effectively controlled; 2. The grinding frame cannot be lifted and lowered stably, safely and reliably during high-speed driving; 3. The grinding position of the rail cannot be accurately adjusted and widely covered; 4. The grinding stone group cannot be quickly and stably replaced during the operation; 5. The grinding beam cannot be quickly and synchronously lifted and lowered during the operation; 6. The lifted grinding frame cannot be stably placed during high-speed driving, and is prone to falling on the rail or other dangerous situations.

[0011] In order to achieve the above technical purposes, the technical solutions provided by the present invention include:

[0012] A high-speed rail grinding trolley for urban rail transit, including a grinding frame and a first lifting mechanism;

[0013] The first lifting mechanism is arranged to be respectively connected to the vehicle body and the grinding frame, and is used to realize the lifting and lowering of the grinding frame.

[0014] The grinding frame is used to install and fix each component for realizing the grinding function, including an installation frame and a grinding beam;

[0015] The installation frame is arranged as a rectangular frame welded into a whole; the grinding beams are symmetrically and parallelly arranged in the installation frame; a suspension shaft is arranged on the installation frame, and the first lifting mechanism includes a lifting component and a suspension component; the lifting component is arranged on both sides of the installation frame and is connected to the vehicle body; the lifting component includes two fourth telescopic members; the suspension component is arranged between the two fourth telescopic members and corresponds to the position of the suspension shaft.

[0016] The grinding beam includes a welded box body, a grinding stone group, a second lifting mechanism and a grinding angle adjustment mechanism;

[0017] The grinding stone groups are symmetrically arranged on the upper and lower sides of the welded box body for grinding the rail; the second lifting mechanism is arranged at both ends of the welded box body for driving the lifting and lowering of the grinding beam and providing a pressing force when the grinding stone group is working; the grinding angle adjustment mechanism is arranged outside the second lifting mechanism and is connected to the installation frame for adjusting the working posture of the grinding beam, and further adjusting the grinding angle of the grinding stone group to the rail.

[0018] In some preferred embodiments, the second lifting mechanism includes two sets of first telescopic members, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod respectively arranged at both ends of the welded box body;

[0019] The first link, the second link, the third link and the fourth link are sequentially connected to form a four-bar linkage with the first link as the frame; the first link is connected to the mounting frame; the third link is connected to the welding box body; one end of the first telescopic member is connected to the middle of the second link, and the other end is connected to the middle of the third link. By the extension and shortening of the first telescopic member, the lifting and lowering of the grinding beam are driven, and a pressing force is provided for the operation of the grinding stone group.

[0020] In some preferred embodiments, the second lifting mechanism further includes a circular cross beam; the circular cross beam is respectively connected to the first link and the second link at both ends of the welding box body, so that the second lifting mechanisms at both ends move synchronously.

[0021] In some preferred embodiments, the grinding angle adjustment mechanism includes a slider and an arc-shaped guide rail; the first link is slidably connected to the mounting frame through the slider and the arc-shaped guide rail, and the arc-shaped opening of the arc-shaped guide rail faces the fourth link; the center position of the circle where the center line of the arc-shaped guide rail is located is lower than the lowest point of the grinding stone group.

[0022] In some preferred embodiments, the grinding angle adjustment mechanism further includes second telescopic members arranged at both ends of the grinding beam; one end of the second telescopic member is connected to the mounting frame, and the other end is connected to the first link. By the extension and shortening of the second telescopic member, the second lifting mechanism is driven to slide along the arc-shaped guide rail, so as to adjust the working posture of the grinding beam, and the grinding stone group grinds different positions of the rail surface.

[0023] In some preferred embodiments, the grinding beam further includes a rotating mechanism for realizing the rotation and locking of the welding box body, so that the grinding stone groups arranged at the upper and lower ends of the welding box body alternately operate;

[0024] The rotating mechanism includes a rotation driving member and a locking unit respectively arranged at both ends of the welding box body;

[0025] The output end of the rotation driving member is fixedly connected to the welding box body, providing power for the rotation of the welding box body;

[0026] The locking unit is fixedly connected to the welding box body, and locks the welding box body when the welding box body rotates in place.

[0027] In some preferred embodiments, the welding box body further includes a rotating shaft; the locking unit includes a frame body, and a third telescopic member, a locking member and a locking ring arranged in the frame body;

[0028] One end of the rotating shaft is fixedly connected to the welded box body, and the other end extends into the frame body; the frame body is fixedly connected to the third connecting rod; the inner surface of the locking ring is fixedly arranged on the outer surface of the rotating shaft, and a plurality of locking grooves are arranged on the outer surface of the locking ring; the locking member is provided with a bolt that cooperates with the locking groove, and the locking member is rotatably connected to the frame body; one end of the third telescopic member is connected to the frame body, and the other end is connected to the locking member. By extending and shortening the third telescopic member, the locking member is driven to move, so that the bolt can be inserted into or withdrawn from the locking groove.

[0029] In some preferred embodiments, the locking unit further includes a displacement sensor for monitoring the displacement of the locking member, and the cooperation state of the bolt and the locking groove is determined by monitoring the displacement of the locking member.

[0030] In some preferred embodiments, a spring is arranged inside the third telescopic member. After the third telescopic member is depressurized, the spring maintains the output end of the third telescopic member in the extended state.

[0031] In some preferred embodiments, the lifting assembly further includes a connecting block, the connecting block is fixedly connected to the installation frame, and a connecting groove is formed on the connecting block, and the fourth telescopic member is rotatably connected to the connecting groove.

[0032] In some preferred embodiments, the suspension assembly includes a fifth telescopic member and a suspension rod. One end of the fifth telescopic member and one end of the suspension rod are both rotatably connected to the vehicle body. The other end of the fifth telescopic member is rotatably connected to the other end of the suspension rod, and a hanging groove that cooperates with the suspension shaft is formed at the other end of the suspension rod.

[0033] In some preferred embodiments, a first state monitoring sensor for monitoring the operating state of the fourth telescopic member is arranged on the fourth telescopic member.

[0034] In some preferred embodiments, the high-speed rail grinding trolley for urban rail transit further includes a second state monitoring sensor and a third state monitoring sensor for monitoring the operating position of the suspension rod.

[0035] Beneficial effects

[0036] 1. The grinding beam can be lifted quickly and reliably through the second lifting mechanism, and a certain pressing force can be provided for the grinding stone group during the grinding process;

[0037] 2. The grinding position of the rail is adjusted and controlled through the grinding angle adjustment mechanism, realizing the precise adjustment and wide coverage of the rail grinding position;

[0038] 3. The rotation mechanism enables rapid rotation and replacement of the grinding stone set, and locks the welding box after rotation, effectively ensuring the working state stability of the grinding stone set installed on the welding box during operation, and reducing potential safety hazards and grinding errors caused by the locking failure of the welding box during operation.

[0039] 4. Through the symmetrically arranged fourth telescopic member, the grinding frame can be quickly lifted and lowered during high-speed driving, avoiding problems such as device failure and uncontrollable state caused by asynchronous lifting and lowering operations.

[0040] 5. Through the cooperation of the suspension assembly and the suspension shaft, the grinding frame can be stably placed after lifting during high-speed driving, avoiding the situation where the grinding frame falls on the rail or other dangerous situations when the lifting device fails after lifting, and ensuring the safety during the operation of the whole vehicle.

[0041] 6. Through the first state monitoring sensor set on the fourth telescopic member, locking can be achieved when the pressure and stroke meet the operation requirements, ensuring the stability of the grinding equipment during the grinding operation; through the second and third state monitoring sensors respectively set on the mounting frame and the mounting frame, automatic monitoring of the running position of the suspension rod can be realized, and the fourth and fifth telescopic members can be controlled according to the monitoring results to ensure the reliability of the working state of the suspension assembly.

[0042] 7. The overall structure of the device is reasonably designed, with low cost and convenient later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an axonometric structure schematic diagram of a high-speed rail grinding trolley for urban rail transit in a preferred embodiment of the present invention;

[0044] Figure 2 It is a top view structure schematic diagram of a high-speed rail grinding trolley for urban rail transit in a preferred embodiment of the present invention;

[0045] Figure 3 It is a front view structure schematic diagram of a high-speed rail grinding trolley for urban rail transit in a preferred embodiment of the present invention;

[0046] Figure 4 It is a front view structure schematic diagram of a grinding beam in a preferred embodiment of the present invention;

[0047] Figure 5 It is an axonometric structure schematic diagram of a grinding beam in a preferred embodiment of the present invention;

[0048] Figure 6 It is an exploded structure schematic diagram of a grinding beam in a preferred embodiment of the present invention;

[0049] Figure 7 Schematic diagram of the lowering structure in a preferred embodiment of the present invention when it is lowered;

[0050] Figure 8 Schematic diagram of the lifting structure in a preferred embodiment of the present invention when it is lifted;

[0051] Figure 9 Schematic diagram of the grinding angle adjustment mechanism in a preferred embodiment of the present invention;

[0052] Figure 10 Schematic diagram of the grinding angle adjustment mechanism in a preferred embodiment of the present invention when it runs to one extreme position;

[0053] Figure 11 Schematic diagram of the grinding angle adjustment mechanism in a preferred embodiment of the present invention when it runs to the other extreme position;

[0054] Figure 12 Schematic diagram for determining the coordinates of the center position of the circle where the center line of the arc-shaped guide rail 242 is located in a preferred embodiment of the present invention;

[0055] Figure 13 Schematic diagram of the locking unit structure in a preferred embodiment of the present invention;

[0056] Figure 14 Schematic diagram of the lifting assembly and the suspension assembly in a preferred embodiment of the present invention;

[0057] Figure 15 Schematic diagram of the lifting assembly in a preferred embodiment of the present invention;

[0058] Figure 16 Schematic diagram of the suspension assembly in a preferred embodiment of the present invention;

[0059] In the figure, 1, mounting frame; 2, grinding beam; 21, welded box body; 211, rotating shaft; 22, grinding stone group; 23, second lifting mechanism; 231, first connecting rod; 232, second connecting rod; 233, third connecting rod; 234, fourth connecting rod; 235, first telescopic member; 236, circular cross beam; 24, grinding angle adjustment mechanism; 241, slider; 242, arc-shaped guide rail; 243, second telescopic member; 3, rotating drive member; 4, locking unit; 41, frame body; 42, third telescopic member; 43, locking member; 431, bolt; 44, locking ring; 441, locking groove; 45, displacement sensor; 5, suspension shaft; 6, lifting assembly; 61, fourth telescopic member; 62, connecting block; 63, connecting groove; 7, suspension assembly; 71, fifth telescopic member; 72, suspension rod; 73, hanging groove; Detailed implementation manners

[0060] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0061] Embodiment 1

[0062] As Figures 1-3 shown, this embodiment discloses a high-speed rail grinding trolley for urban rail transit, including a grinding frame and a first lifting mechanism; the grinding frame is used to install and fix various components for realizing the grinding function, including an installation frame 1 and a grinding beam 2; the installation frame 1 is set as a rectangular frame welded into a whole; the installation frame 1 is set as a rectangular frame welded into a whole; the installation frame 1 is the force-bearing structure for supporting the whole device, and at the same time is the installation structure for connecting the whole device with the vehicle body. Welding it into a rectangular integral frame is to increase the structural stiffness of the installation frame 1. On the other hand, other structural units can also be added to it. Since this part of the content is not the focus of the present invention, the present invention will not describe it in detail, and it can be set by those skilled in the art according to the actual needs on site. Among them, the vehicle body is the basic carrier of the high-speed rail grinding trolley for urban rail transit described in the present invention, provides power for the operation of the grinding trolley, and provides an installation position and force-bearing support for the grinding trolley. Its specific form can be determined by those skilled in the art according to needs, and can be an existing rail transit tool in the prior art, or an independently operating vehicle body designed specifically for the high-speed rail grinding trolley for urban rail transit described in the present invention. The present invention does not make further limitations. And, at least one high-speed rail grinding trolley for urban rail transit can be connected to the same vehicle body. The specific connection quantity and arrangement mode are not the focus of the present invention, so no further discussion will be made. Those skilled in the art should know that the "high speed" is the highest speed that the grinding trolley can be driven to under the technical conditions in the art, which is jointly determined by the working conditions and the driving form. The working speed of the grinding trolley is between the lowest speed and the highest speed.

[0063] The grinding beams 2 are symmetrically and parallelly arranged in the installation frame 1; the grinding beams 2 are the basic units for grinding operations and also the key structures to ensure the operation effect. Symmetrically arranging the grinding beams 2 in the installation frame 1 is beneficial to the force balance during the operation and reduces the risk of derailment of the grinding trolley. On the other hand, by reasonably setting the spacing between the grinding beams 2 according to the gauge of the rail, grinding operations on two rails can be carried out simultaneously, reducing the operation intensity, so that the grinding trolley can complete the grinding of the entire section of the rail in one pass.

[0064] The grinding beam 2 includes a welded box body 21, a grinding stone group 22, a second lifting mechanism 23, and a grinding angle adjustment mechanism 24;

[0065] The grinding stone groups 22 are symmetrically arranged on the upper and lower sides of the welded box body 21 for grinding the rail; the grinding stone groups 22 are the components that come into contact with the rail to achieve the grinding operation. There are many existing technologies in the field regarding the specific arrangement forms of the grinding stones, so the present invention will not elaborate on them here. Obviously, in order to achieve horizontal force balance during the operation of the grinding beam 2, the end and middle grinding stones of the grinding stone group 22 are preferably symmetrically distributed.

[0066] The second lifting mechanism 23 is arranged at both ends of the welded box body 21, used to drive the lifting and lowering of the grinding beam 2 and provide a pressing force when the grinding stone group 22 is working; the second lifting mechanism 23 is used to realize the lifting and lowering of the entire grinding beam 2. When grinding operations are required, lower the grinding beam 2 so that the grinding stone group 22 contacts the rail surface and maintains a certain pressing force. When in a non-operation state, lift the grinding beam 2 so that the grinding stone group 22 keeps a certain distance from the rail.

[0067] The grinding angle adjustment mechanism 24 is arranged outside the second lifting mechanism 23 and is connected to the installation frame 1, used to adjust the operation posture of the grinding beam 2, and thus adjust the grinding angle of the grinding stone group 22 on the rail.

[0068] It should be understood that in the common technologies in the field, there is no spare for the consumable part of grinding: the grinding stone. Therefore, when any group of grinding stones is exhausted, it is necessary to stop the vehicle to replace the grinding stone group 22 before continuing the operation. In this embodiment, the symmetrically arranged grinding stone groups 22 have one as a spare. When one group of grinding stones is used up, the spare grinding stones can be used by rotating the grinding beam 2. After both groups of grinding stones are used up, then stop the vehicle to replace the grinding stones. During the grinding operation, the symmetric arrangement of the grinding stone groups is more likely to meet the requirements of the subway clearance compared to the cross shape. It should be understood that four groups of grinding stone groups 22 can also be set, and their working principles are the same as those in this embodiment. This reduces the time-consuming for stopping the vehicle to replace the grinding stones, improves the operation efficiency, and saves the operation time.

[0069] The first lifting mechanism is configured to be connected to the vehicle body and the grinding frame respectively, and is used to lift and lower the grinding frame.

[0070] The grinding trolley further includes a traveling mechanism for performing the traveling function. The traveling mechanism is connected to the grinding frame, and its specific form can be set with reference to the prior art, which will not be elaborated in this application.

[0071] Embodiment 2

[0072] This embodiment is developed on the basis of the above Embodiment 1. As Figures 4-6 shown, this embodiment gives a specific structural example of the grinding beam 2.

[0073] The second lifting mechanism 23 includes two sets of first telescopic members 235, first connecting rods 231, second connecting rods 232, third connecting rods 233 and fourth connecting rods 234 respectively arranged at both ends of the welding box body 21;

[0074] The first connecting rod 231, the second connecting rod 232, the third connecting rod 233 and the fourth connecting rod 234 are sequentially connected to form a four-bar linkage mechanism with the first connecting rod 231 as the frame; the first connecting rod 231 is connected to the mounting frame 1; the third connecting rod 233 is connected to the welding box body 21; one end of the first telescopic member 235 is connected to the middle of the second connecting rod 232, and one end is connected to the middle of the third connecting rod 233. By the elongation and shortening of the first telescopic member 235, the lifting and lowering of the grinding beam 2 are driven, and a pressing force is provided when the grinding stone group 22 works. It should be understood that the lengths of the respective connecting rods and the specific connection positions of the first telescopic member 235 and the connecting rod structure jointly determine the motion state of the entire connecting rod structure. Therefore, those skilled in the art need to design and calculate according to the actual situation on site. This part of the content does not fall within the scope of protection of the present invention, so it will not be elaborated further. It should be noted that all the telescopic members in the present invention, including but not limited to any one of hydraulic cylinders, oil cylinders, air cylinders, and gear racks, as long as they can achieve the telescopic function under control, meet the requirements of the present invention. Therefore, no further limitation is made. Preferably, in order to simplify the energy supply system of the entire device, the forms of the telescopic members are preferably unified. For example, if hydraulic energy supply is adopted, the telescopic member is preferably a hydraulic cylinder. The motion state of the entire connecting rod structure will be specifically described below:

[0075] As Figure 7As shown, when the first telescopic member 235 extends, the angle between the second link 232 and the third link 233 increases, and the position of the movable end of the fourth link 234 moves downward. At this time, the whole formed by the second, third, and fourth links can be regarded as making a clockwise movement around the upper rotating pair of the first link 231. Therefore, the welded box body 21 connected to the third link 233 descends accordingly, so that the grinding stone set 22 descends and contacts the rail surface. At this time, the link mechanism should also maintain a certain tendency to continue moving to provide a certain pressing force for the grinding stone set 22 during operation.

[0076] As Figure 8 shown, when the first telescopic member 235 shortens, the angle between the second link 232 and the third link 233 decreases, and the position of the movable end of the fourth link 234 moves upward. At this time, the whole formed by the second, third, and fourth links can be regarded as making a counterclockwise movement around the upper rotating pair of the first link 231. Therefore, the welded box body 21 connected to the third link 233 rises accordingly, so that the grinding stone set 22 moves away from the rail. It should be understood that no matter how the link mechanism is arranged and moves, the grinding stone set 22 makes a vertical up-and-down movement relative to the top of the rail, avoiding deflection to prevent dislocation.

[0077] Embodiment 3

[0078] This embodiment is developed on the basis of the above Embodiment 2. As Figure 9 shown, this embodiment gives another specific structural example of the grinding beam 2.

[0079] The grinding angle adjustment mechanism 24 includes a slider 241 and an arc-shaped guide rail 242; the first link 231 is slidably connected to the mounting frame 1 through the slider 241 and the arc-shaped guide rail 242, and the arc-shaped opening of the arc-shaped guide rail 242 faces the fourth link 234. In some other preferred embodiments, the slider 241 is fixedly arranged outside the first link 231, and the arc-shaped guide rail 242 is arranged at a position corresponding to the slider 241 inside the mounting frame 1. As Figures 10-11 shown, the slider 241 slides in the arc-shaped guide rail 242, thereby driving the grinding beam 2 to perform an arc-shaped movement, and further changing the working posture of the grinding stone set 22 (mainly referring to the contact position between the grinding stone set 22 and the end of the rail). It should be understood that in the prior art, when adjusting the angle of the grinding device for grinding the rail surface, a link mechanism is mostly used. Those skilled in the art can know that due to the limitations of its own characteristics, the link mechanism has limited adjustment range and accuracy when adjusting the angle, and there is a sudden change in the adjustment speed during the angle adjustment process. However, the combination of the slider and the guide rail adopted in this application can achieve precise adjustment and wide coverage of the grinding position of the rail surface, and the adjustment speed is smooth and controllable.

[0080] In some other preferred embodiments, a specific solution for driving the movement of the slider 241 is also provided. The grinding angle adjustment mechanism 24 further includes second telescopic members 243 disposed at both ends of the grinding beam 2. One end of each second telescopic member 243 is connected to the mounting frame 1, and the other end is connected to the first connecting rod 231. By extending and shortening the second telescopic members 243, the second lifting mechanism 23 is driven to slide along the arc-shaped guide rail 242, so as to adjust the working posture of the grinding beam 2, enabling the grinding stone group 22 to grind different positions of the rail surface. It should be understood that the trajectory and direction of the arc-shaped guide rail 242, the installation position of the slider 241, and the connection position between the second telescopic member 243 and the first connecting rod 231 jointly determine the specific working posture of the grinding beam 2 and the angle when the grinding stone group 22 grinds the rail. Therefore, those skilled in the art need to design and calculate according to the actual situation on site, and this part of the content does not fall within the scope of protection of the present invention, so it will not be elaborated further.

[0081] In some preferred embodiments, the center position of the circle where the center line of the arc-shaped guide rail 242 is located is lower than the lowest point of the grinding stone group 22. It should be understood that the lowest point of the grinding stone is the contact point when it contacts the rail surface. The trajectory of the arc-shaped guide rail 242 (i.e., the circle where the center line of the arc-shaped guide rail 242 is located) is the key to determining the relative position between the grinding stone group and the rail during grinding. The following is the existing analysis:

[0082] The relationship between the trajectory center and the rail surface mainly includes the following three types:

[0083] 1. The trajectory center is above the rail surface; at this time, the contact point position between the grinding stone group and the rail surface is located on the extension line of the connection line between the grinding stone group and the slider. At this time, the movement direction of the grinding stone group is opposite to the movement direction of the slider in the arc-shaped guide rail. It is easy to have problems such as too large a grinding angle adjustment range, difficult speed control, and inability to simulate the rail surface profile. Moreover, the angle deflection direction of the grinding stone group is opposite to the angle change direction of the rail profile curve in the movement direction of the grinding stone group, resulting in the working surface of the grinding stone group being unable to contact the rail profile well after movement.

[0084] 2. The trajectory center is exactly on the rail surface; at this time, no matter how the grinding beam deflects, theoretically, its grinding position on the rail surface will not change, only the contact angle between the grinding stone group and the rail surface changes. Such an effect obviously does not meet the requirements of the present invention.

[0085] 3. The center of the locus is below the rail surface; at this time, the contact point between the grinding stone group and the rail surface is located on the connection line between the grinding stone group and the slider. At this time, the adjustment amount of the grinding angle is linearly related to the sliding amount of the slider in the arc-shaped guide rail, so that the precise control of the grinding angle can be realized, and the arc-shaped locus has a high similarity with the rail surface profile, and the profiling effect is good. Therefore, a higher positioning accuracy of the grinding position can be achieved.

[0086] Preferably, the center position of the circle where the center line of the arc-shaped guide rail 242 is located is lower than the lowest point of the grinding stone group 22 and is located on the track center line.

[0087] Furthermore, as Figure 12 shown, in some preferred embodiments, a specific method for determining the center position of the circle where the center line of the arc-shaped guide rail 242 is located is also given:

[0088] Establish a two-dimensional coordinate system with the x-axis parallel to the bottom surface of the rail;

[0089] Extend each grinding angle line and intersect the grinding angle lines with the same absolute value respectively; when the root mean square value of the difference between the center position coordinates and all the intersection point coordinate values is the smallest, it is the optimized center position coordinate, and it is used as the center position coordinate of the circle where the center line of the arc-shaped guide rail 242 is located.

[0090] Obviously, when the second telescopic members 243 at both ends move synchronously, the movement of the entire second lifting mechanism 23 will also be synchronous, thus avoiding torsion and uneven stress. In some preferred embodiments, in order to enhance the synchronization of the movement of the second lifting mechanisms 23 at the left and right ends and eliminate the movement errors that may be brought by the control program, the second lifting mechanism 23 further includes a circular cross beam 236; the circular cross beam 236 is respectively connected to the first connecting rod 231 and the second connecting rod 232 at both ends of the welding box body 21 to make the second lifting mechanisms 23 at both ends move synchronously. Preferably, the circular cross beam 236 is fixedly connected to the second connecting rod 232 and rotatably connected to the first connecting rod 231. Specifically, the connection positions of the circular cross beam 236 with the first connecting rod 231 and the second connecting rod 232 are located at the positions of the rotating pairs.

[0091] Embodiment 4

[0092] This embodiment is developed on the basis of the above Embodiment 1. As Figure 4 shown, this embodiment gives a structural example of a rotating and locking mounting frame 1 so that the grinding stone groups 22 operate alternately.

[0093] The grinding beam 2 further includes a rotating mechanism for realizing the rotation and locking of the welding box body 21 so that the grinding stone groups 22 arranged at the upper and lower ends of the welding box body 21 operate alternately;

[0094] The rotation mechanism includes a rotation driving member 3 and a locking unit 4 respectively arranged at both ends of the welding box body 21;

[0095] The output end of the rotation driving member 3 is fixedly connected to the welding box body 21 to provide power for the rotation of the welding box body 21; It should be understood that the rotation driving member 3 further includes a housing for installation and fixation, and the housing is fixedly connected to the third connecting rod 233. The rotation driving member 3 can be any one of a hydraulic motor, an electric motor or a pneumatic motor. Preferably, in order to reduce the power source required in the present invention, a motor matching the energy supply mode of the telescopic member is selected. For example, when the telescopic member is a hydraulic cylinder, the rotation driving member 3 can be a hydraulic motor. In order to further simplify the structure and reduce the size, the rotation driving member 3 can have a built-in braking function, starting to brake when the rotation stops and stopping braking when the rotation starts.

[0096] The locking unit 4 is fixedly connected to the welding box body 21, and locks the welding box body 21 after the welding box body 21 rotates in place. Those skilled in the art should know that the common methods for locking the rotation of rotating parts in the art mainly include the following: 1. Using a motor with a brake to lock the rotating part. 2. The way of meshing a fixed gear disk with a moving gear disk. 3. Achieving a locking mechanism through self-locking of the friction angle.

[0097] The above conventional methods have the following disadvantages: 1. In the first and third solutions, the locking is achieved by friction. When applied in an environment with a large amount of vibration, the locking mechanism may shift slightly, resulting in locking failure. In the second solution, the rotating part is locked by gear meshing. At this time, the gear teeth are subjected to shear force. In an environment with a large amount of vibration, the meshing gears will be squeezed and even cracked, resulting in an increase in the clearance between the gears and locking failure. 2. The redundancy is not high. Once the locking method fails, the overall locking effect will fail. The space of the mechanism is limited, the number of locking mechanisms arranged is small, and it will also increase the complexity of the overall mechanism, making daily maintenance inconvenient and correspondingly increasing the use cost. 3. The locked state is not clear. None of the above methods can directly feedback the locked state and the information feedback on whether the locking effect is incorrect. It is necessary to confirm manually before proceeding to the next step.

[0098] In order to solve the problems existing in the above prior art, in a preferred embodiment of the present invention, a preferred structure of the locking unit 4 is provided.

[0099] As Figure 13 shown, the welding box body 21 further includes a rotating shaft 211; the locking unit 4 includes a frame body 41, and a third telescopic member 42, a locking member 43 and a locking ring 44 arranged in the frame body 41;

[0100] One end of the rotating shaft 211 is fixedly connected to the welded box body 21, and the other end extends into the frame body 41; the frame body 41 is fixedly connected to the third connecting rod 233; the inner surface of the locking ring 44 is fixedly arranged on the outer surface of the rotating shaft 211, and a plurality of locking grooves 441 are arranged on the outer surface of the locking ring 44; the locking member 43 is provided with a latch 431 that cooperates with the locking groove 441, and the locking member 43 is rotatably connected to the frame body 41; one end of the third telescopic member 42 is connected to the frame body 41, and the other end is connected to the locking member 43. By extending and shortening the third telescopic member 42, the locking member 43 is driven to move, so that the latch 431 can be inserted into or withdrawn from the locking groove 441. The working principle is as follows:

[0101] The position of the locking groove 441 on the outer surface of the locking ring 44 corresponds to the grinding stone group 22. In the present invention, since the two groups of grinding stones are symmetrically arranged, the locking grooves 441 are also symmetrically arranged. When the rotating shaft 211 rotates in place, it means that the grinding stone group 22 also rotates and replaces in place at this time. At this time, the output end of the third telescopic member 42 is pushed to extend, driving the locking member 43 to move in the direction of the transmission shaft. At this time, the latch 431 is inserted into the locking groove 441, and the output end of the third telescopic member 42 stops extending, completing the locking of the welded box body 21. When it is necessary to release the lock, the output end of the third telescopic member 42 retracts, driving the locking member 43 to rotate in the direction away from the transmission shaft. At this time, the latch 431 withdraws from the locking groove 441, and the output end of the third telescopic member 42 stops retracting. At this time, the rotating shaft 211 can rotate. The locking structure in this embodiment can adapt to the working environment with long-term vibration, and solve the working interference of vibration on the locking mechanism and the influence on the locking effect.

[0102] In some preferred embodiments, in order to cope with the emergency situation when the third telescopic member 42 fails and solve the problem of insufficient redundancy, a variety of ways are provided to cooperate to prevent the locking from failing. A spring is arranged in the third telescopic member 42. When the third telescopic member 42 is depressurized, the spring maintains the output end of the third telescopic member 42 in the extended state, so that the latch 431 remains inserted into the locking groove 441 to achieve the locking effect.

[0103] Furthermore, in order to achieve precise control of the locked state and solve the problem of unclear locked state, in some other preferred embodiments, the locking unit 4 further includes a displacement sensor 45 for monitoring the displacement of the locking member 43, and determines the mating state of the bolt 431 and the locking groove 441 at this time by monitoring the displacement of the locking member 43. Those skilled in the art can set a displacement threshold. When the distance between the locking member 43 and the displacement sensor 45 is within this displacement threshold, it is considered that the bolt 431 is inserted into the locking groove 441 at this time, and the welding box 21 is locked; when the distance between the locking member 43 and the displacement sensor 45 is outside this displacement threshold, it is considered that the bolt 431 exits the locking groove 441 at this time, and the welding box 21 can rotate.

[0104] It should be understood that the specific form of the displacement sensor 45 can be set on-site by those skilled in the art according to the design of the control scheme, and it can be a proximity switch, an infrared distance sensor, a pressure sensor or any other sensor that can detect the displacement of the locking member 43. Further, the present invention does not intend to specifically limit the setting of its specific position, and a train of thought for setting the position of the displacement sensor 45 can be provided here.

[0105] In the figure, displacement sensors 45 located at the end and root of the locking member 43 together constitute a detection system for the mating state of the bolt 431 and the locking groove 441. Two sensors are provided to verify whether the signals of the sensors are accurate.

[0106] Embodiment 5

[0107] As Figure 14 shown, this embodiment is developed on the basis of the above Embodiment 1, and this embodiment gives a specific structural example of a first lifting mechanism that can achieve stable, safe and reliable lifting of the grinding frame during high-speed driving.

[0108] A suspension shaft 5 is provided on the mounting frame 1, and the first lifting mechanism includes a lifting assembly 6 and a suspension assembly 7; the lifting assembly 6 is arranged on both sides of the mounting frame 1 and is connected to the vehicle body; the lifting assembly 6 includes two fourth telescopic members 61; the suspension assembly 7 is arranged between the two fourth telescopic members 61 and corresponds to the position of the suspension shaft 5.

[0109] It should be noted that in the traditional grinding frame lifting device, the lifting oil cylinder and the grinding frame are usually fixedly connected. This structure does not consider the lateral offset of the grinding frame relative to the whole vehicle when the grinding trolley passes through the curved track. When passing through the curve, the hydraulic cylinder will bear a large lateral force, which may cause the grinding frame to derail; this structure cannot accurately monitor and control the grinding pressure and stroke, resulting in a large gap between the actual grinding operation state and the preset state, and it is impossible to achieve a stable and reliable grinding effect; on the other hand, when the lifting device fails, the grinding frame has the risk of falling onto the rail, affecting the operation and line safety. In this application, a suspension shaft 5 is provided on the mounting frame 1. Specifically, the number of suspension shafts 5 is preferably 4. These 4 suspension shafts 5 are divided into two groups in pairs. These two groups of suspension shafts 5 are respectively located on two mutually parallel side surfaces of the mounting frame 1. The two sides of the mounting frame 1 are connected to the vehicle body through the lifting assembly 63. The lifting assembly 6 includes two fourth telescopic members 61, that is, the top of the fourth telescopic member 61 is connected to the vehicle body. A suspension assembly 7 is provided between the two fourth telescopic members 61. The suspension assembly 7 is preferably provided with 4 groups. The 4 groups of suspension assemblies 7 are respectively arranged corresponding to the 4 suspension shafts 5, that is, one suspension shaft 5 corresponds to one suspension assembly 7. When the lifting assembly 6 lifts the grinding frame, by connecting the suspension shaft 5 with the suspension assembly 7, the lifted grinding frame can be stably placed on the suspension assembly 7, so as to maintain the stability of the lifted grinding frame and avoid the dangerous situations of tilting, collapsing or even falling during high-speed driving.

[0110] Specifically, the working mode of this application is as follows: When it is necessary to start grinding the track, the fourth telescopic member 61 shortens to lift the grinding frame to the highest point, separating the suspension shaft 5 from the suspension assembly 7, and the suspension assembly 7 changes the angle and separates from the mounting frame 1. The fourth telescopic member 61 extends to lower the grinding frame. When the grinding frame reaches the predetermined position (in some preferred embodiments, the predetermined position includes the grinding frame contacting the track or the grinding frame contacting the track and maintaining a certain pressing force), the fourth telescopic member 61 is locked; when it is necessary to end the grinding of the rail, the fourth telescopic member 61 shortens to lift the grinding frame to the highest point, the suspension assembly 7 changes the angle and approaches the mounting frame 1, the fourth telescopic member 61 extends to lower the grinding frame. When the suspension shaft 5 is connected to the suspension assembly 7, the fourth telescopic member 61 is locked; through the symmetrically arranged fourth telescopic members 61 in this application, the lifting and lowering of the grinding frame can be quickly realized during high-speed driving, avoiding problems such as device failure and uncontrollable state caused by asynchronous lifting and lowering operations; through the cooperation of the suspension assembly 7 and the suspension shaft 5, the stable placement of the lifted grinding frame can be realized during high-speed driving, avoiding the situation that the grinding frame falls on the rail or other dangerous situations when the lifting device fails after lifting, and ensuring the safety during the operation of the whole vehicle.

[0111] Embodiment 6

[0112] Such asFigure 15 As shown, this embodiment is developed on the basis of the above-mentioned Embodiment 5, and this embodiment provides a specific structural example of the lifting assembly 6.

[0113] The lifting assembly 6 further includes a connecting block 62. The connecting block 62 is fixedly connected to the mounting frame 1, and a connecting groove 63 is formed in the connecting block 62. The fourth telescopic member 61 is rotatably connected to the connecting groove 63. It should be noted that in this application, the connecting block 62, the connecting groove 63, and the fourth telescopic member 61 are provided. Connecting blocks 62 are fixedly connected to both ends of both sides of the mounting frame 1, that is, four connecting blocks 62 are provided on one mounting frame 1. The fourth telescopic member 61 is connected to the connecting block 62 through the connecting groove 63. Preferably, the fourth telescopic member 61 and the connecting groove 63 are connected through a spherical bearing, so that the fourth telescopic member 61 and the connecting groove 63 can rotate, and the movement trajectory of the fourth telescopic member 61 is a curve. This free passage through the curve technology can enable the fourth telescopic member 61 to achieve a certain free offset in the horizontal and vertical directions to adapt to the horizontal offset of the grinding frame relative to the whole vehicle when passing through the curve, thereby greatly increasing the curve passing ability of the grinding trolley.

[0114] Embodiment 7

[0115] As Figure 16 shown, this embodiment is developed on the basis of the above-mentioned Embodiment 6, and the embodiment provides a specific structural example of the suspension assembly 7.

[0116] The suspension assembly 7 includes a fifth telescopic member 71 and a suspension rod 72. One end of the fifth telescopic member 71 and one end of the suspension rod 72 are both rotatably connected to the vehicle body. The other end of the fifth telescopic member 71 is rotatably connected to the other end of the suspension rod 72, and a hanging groove 73 matching the suspension shaft 5 is formed in the other end of the suspension rod 72.

[0117] It should be noted that the present application is provided with a fifth telescopic member 71, a suspension rod 72, and a hanging groove 73. Specifically, one end of the fifth telescopic member 71 and one end of the suspension rod 72 are both rotatably connected to the vehicle body, that is, the top positions of the fifth telescopic member 71 and the suspension rod 72 are fixed. The other end of the fifth telescopic member 71 is rotatably connected to the other end of the suspension rod 72, so that a V-shaped structure with a variable angle is formed between the fifth telescopic member 71 and the suspension rod 72. During actual operation, since the top positions of the fifth telescopic member 71 and the suspension rod 72 are fixed, the angle of the suspension rod 72 is changed by controlling the extension and retraction of the fifth telescopic member 71 to move closer to or away from the mounting frame 1. Specifically, one working mode of the suspension assembly 7 is that the fifth telescopic member 71 extends and becomes longer, driving the suspension rod 72 to move towards the mounting frame 1; the second working mode of the suspension assembly 7 is that the fifth telescopic member 71 retracts and becomes shorter, driving the suspension rod 72 to move away from the mounting frame 1. It is worth noting that through the cooperation of the fifth telescopic member 71 and the fourth telescopic member 61, the suspension shaft 5 of the lifted mounting frame 1 is placed in the limit hanging groove 73, further preventing the grinding frame from falling on the rail or other dangerous situations when the lifting device fails, and ensuring the running safety.

[0118] Embodiment 8

[0119] This embodiment is developed on the basis of the above-mentioned Embodiment 5. The fourth telescopic member 61 is provided with a first state monitoring sensor. It should be noted that the first state monitoring sensor is used to sense and control the telescopic length of the fourth telescopic member 61, so that the fourth telescopic member 61 stops telescoping and locks when it extends or retracts to a specified length, ensuring that the lifting and lowering of the grinding frame can be completed efficiently and quickly, and indirectly ensuring the stability of the grinding equipment during the grinding operation. It should be noted that the first state monitoring sensor can be a pressure sensor and / or a displacement sensor 45. In some other preferred embodiments, in order to realize the automatic monitoring of the running position of the suspension rod 72 and ensure the reliability of the working state of the suspension assembly 7, the high-speed rail grinding trolley for urban rail transit further includes a second state monitoring sensor and a third state monitoring sensor for monitoring the running position of the suspension rod 72. Its specific installation position can be determined by those skilled in the art according to the actual situation and needs on site. The following is a detailed description of its working process: The second state monitoring sensor is provided with a first proximity threshold. When the suspension rod 72 approaches the mounting frame 1 and enters the first proximity threshold, it is determined that the suspension rod 72 has reached the running position, and the grinding frame can be lowered so that the suspension shaft 5 falls into the hanging groove 73 to complete the stable placement of the lifted grinding frame; The third state monitoring sensor is provided with a second proximity threshold. When the suspension rod 72 moves away from the mounting frame 1 and enters the second proximity threshold, it is determined that the suspension rod 72 has reached the running position, and the grinding frame can be lowered so that the grinding frame descends to a predetermined position, enabling the grinding equipment to grind the rail; This embodiment realizes the automatic monitoring of the running position of the suspension rod 72 and controls the fifth telescopic member 71 in accordance with the monitoring results to ensure the reliability of the working state of the suspension assembly 7. It should be understood that the second and third state monitoring sensors can be any one of a displacement sensor 45 and a proximity switch.

[0120] In some preferred embodiments, a chain block is further provided between the mounting frame 1 and the vehicle body. It should be noted that this structure is provided with a chain block device. Through this autonomous rapid rescue technology, in the event of an emergency where the grinding trolley derails and the power supply system fails during the grinding operation, the grinding trolley can be lifted by manually cranking the chain block, and rapid autonomous rescue can be achieved without additional auxiliary equipment, thus not affecting the safe operation of the line. Preferably, the chain block can be arranged at the position of the fourth corner at the top of the mounting frame 1.

[0121] One of the working modes of this embodiment is as follows: when it is necessary to start grinding the track, the fourth telescopic member 61 shortens to lift the grinding frame to the highest point, separating the suspension shaft 5 from the hanging groove 73. The fifth telescopic member 71 shortens to change the angle of the suspension rod 72 and move away from the mounting frame 1. When the suspension rod 72 enters the second proximity threshold built in the third state monitoring sensor, it is determined that the suspension rod 72 has reached the operating position, and the grinding frame can be lowered. The fifth telescopic member 71 is locked, and the fourth telescopic member 61 is controlled to extend to lower the grinding frame. When the grinding frame reaches the predetermined position, the fourth telescopic member 61 is locked; when it is necessary to end the grinding of the rail, the fourth telescopic member 61 shortens to lift the grinding frame to the highest point, and the fifth telescopic member 71 extends to change the angle of the suspension rod 72 to approach the mounting frame 1. When the suspension rod 72 enters the first proximity threshold built in the second state monitoring sensor, it is determined that the suspension rod 72 has reached the operating position, and the grinding frame can be lowered so that the suspension shaft 5 falls into the hanging groove 73. The fifth telescopic member 71 is locked, and the fourth telescopic member 61 is controlled to extend to lower the mounting frame 1. When the suspension shaft 5 falls into the hanging groove 73, the fourth telescopic member 61 is locked to complete the stable placement of the lifted grinding frame.

[0122] In summary, the present invention solves the technical problems existing in the prior art and achieves the following technical effects:

[0123] 1. The grinding beam can be lifted and lowered quickly and reliably through the second lifting mechanism, and can provide a certain pressing force for the grinding stone group during the grinding process; 2. The grinding position of the rail is adjusted and controlled through the grinding angle adjustment mechanism, realizing the precise adjustment and wide coverage of the grinding position of the rail; 3. The grinding stone group can be rotated and replaced quickly through the rotating mechanism, and the welding box body is locked after the rotation is completed, effectively ensuring the working state stability of the grinding stone group installed on the welding box body during the operation, and reducing the potential safety hazards and grinding errors caused by the locking failure of the welding box body during the operation; 4. Through the symmetrically arranged fourth telescopic members, the grinding frame can be quickly lifted and lowered during the high-speed driving process, avoiding problems such as device failure and uncontrollable state caused by the asynchrony during the lifting and lowering operations; 5. Through the cooperation of the suspension assembly and the suspension shaft, the stable placement of the lifted grinding frame can be realized during the high-speed driving process, avoiding the situation that the grinding frame falls on the rail or other dangerous situations when the lifting device fails after lifting, and ensuring the safety during the operation of the whole vehicle; 6. Through the first state monitoring sensor set on the fourth telescopic member, locking can be realized when the pressure and stroke meet the operation requirements, ensuring the stability of the grinding equipment during the grinding operation; through the second and third state monitoring sensors respectively set on the mounting frame and the mounting frame, the automatic monitoring of the running position of the suspension rod can be realized, and the fourth and fifth telescopic members are controlled in accordance with the monitoring results to ensure the reliability of the working state of the suspension assembly; 7. The structure of the present invention is reasonably designed, the cost is low, and the later maintenance is relatively convenient.

[0124] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A high-speed rail grinding trolley for urban rail transit, characterized in that: It includes a grinding frame and a first lifting mechanism; The first lifting mechanism is configured to be respectively connected to the vehicle body and the grinding frame for lifting and lowering the grinding frame; the grinding frame is used for installing and fixing various components for realizing the grinding function, including an installation frame (1) and a grinding beam (2); the installation frame (1) is configured as a rectangular frame welded integrally; the grinding beams (2) are symmetrically and parallelly arranged in the installation frame (1); a suspension shaft (5) is arranged on the installation frame (1), and the first lifting mechanism includes a lifting component (6) and a suspension component (7); the lifting component (6) is arranged on both sides of the installation frame (1) and connected to the vehicle body; the lifting component (6) includes two fourth telescopic members (61); the suspension component (7) is arranged between the two fourth telescopic members (61) and corresponds to the position of the suspension shaft (5); The grinding beam (2) includes a welded box body (21), a grinding stone group (22), a second lifting mechanism (23) and a grinding angle adjustment mechanism (24); The grinding stone groups (22) are symmetrically arranged on the upper and lower sides of the welded box body (21) for grinding the rail; the second lifting mechanism (23) is arranged at both ends of the welded box body (21) for driving the lifting and lowering of the grinding beam (2) and providing a pressing force when the grinding stone groups (22) are working; the grinding angle adjustment mechanism (24) is arranged outside the second lifting mechanism (23) and connected to the installation frame (1) for adjusting the working posture of the grinding beam (2), and further adjusting the grinding angle of the grinding stone groups (22) to the rail; The second lifting mechanism (23) includes two sets of first telescopic members (235), a first connecting rod (231), a second connecting rod (232), a third connecting rod (233) and a fourth connecting rod (234) respectively arranged at both ends of the welded box body (21); The first connecting rod (231), the second connecting rod (232), the third connecting rod (233) and the fourth connecting rod (234) are sequentially connected to form a four-bar mechanism with the first connecting rod (231) as the frame; the first connecting rod (231) is connected to the installation frame (1); the third connecting rod (233) is connected to the welded box body (21); one end of the first telescopic member (235) is connected to the middle of the second connecting rod (232), and the other end is connected to the middle of the third connecting rod (233). By the elongation and shortening of the first telescopic member (235), the lifting and lowering of the grinding beam (2) are driven, and a pressing force is provided for the work of the grinding stone groups (22).

2. The high-speed rail grinding trolley for urban rail transit according to claim 1, characterized in that: The second lifting mechanism (23) further includes a circular cross beam (236); the circular cross beam (236) is respectively connected to the first connecting rod (231) and the second connecting rod (232) at both ends of the welded box body (21) to enable the second lifting mechanisms (23) at both ends to move synchronously.

3. The high-speed rail grinding trolley for urban rail transit according to claim 1, characterized in that: The grinding angle adjustment mechanism (24) includes a slider (241) and an arc-shaped guide rail (242); the first connecting rod (231) is slidably connected to the mounting frame (1) through the slider (241) and the arc-shaped guide rail (242), and the arc-shaped opening of the arc-shaped guide rail (242) faces the fourth connecting rod (234); the center position of the circle where the center line of the arc-shaped guide rail (242) is located is lower than the lowest point of the grinding stone set (22).

4. The high-speed rail grinding trolley for urban rail transit according to claim 3, characterized in that: The grinding angle adjustment mechanism (24) further includes second telescopic members (243) provided at both ends of the grinding beam (2); one end of each second telescopic member (243) is connected to the mounting frame (1), and the other end is connected to the first connecting rod (231). By the extension and shortening of the second telescopic members (243), the second lifting mechanism (23) is driven to slide along the arc-shaped guide rail (242), so as to adjust the working posture of the grinding beam (2), and the grinding stone set (22) can grind different positions of the rail surface of the rail.

5. The high-speed rail grinding trolley for urban rail transit according to claim 1, wherein: The grinding beam (2) further includes a rotating mechanism for realizing the rotation and locking of the welding box body (21), so that the grinding stone sets (22) provided at the upper and lower ends of the welding box body (21) can alternately perform operations. The rotating mechanism includes a rotating driving member (3) and a locking unit (4) respectively provided at both ends of the welding box body (21); the output end of the rotating driving member (3) is fixedly connected to the welding box body (21) to provide power for the rotation of the welding box body (21). The locking unit (4) is fixedly connected to the welding box body (21), and when the welding box body (21) rotates in place, the welding box body (21) is locked.

6. The high-speed rail grinding trolley for urban rail transit according to claim 5, wherein: The welding box body (21) further includes a rotating shaft (211); the locking unit (4) includes a frame body (41), and a third telescopic member (42), a locking member (43) and a locking ring (44) provided in the frame body (41). One end of the rotating shaft (211) is fixedly connected to the welding box body (21), and the other end extends into the frame body (41); the frame body (41) is fixedly connected to the third connecting rod (233); the inner surface of the locking ring (44) is fixedly arranged on the outer surface of the rotating shaft (211), and a plurality of locking grooves (441) are provided on the outer surface of the locking ring (44); the locking member (43) is provided with a bolt (431) that cooperates with the locking grooves (441), and the locking member (43) is rotatably connected to the frame body (41); one end of the third telescopic member (42) is connected to the frame body (41), and the other end is connected to the locking member (43). By the extension and shortening of the third telescopic member (42), the locking member (43) is driven to move, so that the bolt (431) can be inserted into or withdrawn from the locking grooves (441).

7. The high-speed rail grinding trolley for urban rail transit according to claim 6, characterized in that: The locking unit (4) further includes a displacement sensor (45) for monitoring the displacement of the locking member (43), and the cooperation state of the bolt (431) and the locking grooves (441) is determined by monitoring the displacement of the locking member (43).

8. The high-speed rail grinding trolley for urban rail transit according to claim 6, wherein: A spring is arranged inside the third telescopic member (42). After the third telescopic member (42) is depressurized, the spring maintains the output end of the third telescopic member (42) in the extended state.

9. The high-speed rail grinding trolley for urban rail transit according to claim 1, wherein: The lifting assembly (6) further includes a connecting block (62). The connecting block (62) is fixedly connected to the mounting frame (1), and a connecting groove (63) is formed in the connecting block (62). The fourth telescopic member (61) is rotatably connected to the connecting groove (63).

10. The high-speed rail grinding trolley for urban rail transit according to claim 9, characterized in that: The suspension assembly (7) includes a fifth telescopic member (71) and a suspension rod (72). One end of the fifth telescopic member (71) and one end of the suspension rod (72) are both rotatably connected to the vehicle body. The other end of the fifth telescopic member (71) is rotatably connected to the other end of the suspension rod (72), and a hanging groove (73) matching with the suspension shaft (5) is formed in the other end of the suspension rod (72).

11. The high-speed rail grinding trolley for urban rail transit according to claim 9, characterized in that: A first state monitoring sensor for monitoring the operating state of the fourth telescopic member (61) is arranged on the fourth telescopic member (61).

12. The high-speed rail grinding trolley for urban rail transit according to claim 9, wherein: The high-speed rail grinding trolley for urban rail transit further includes a second state monitoring sensor and a third state monitoring sensor for monitoring the operating position of the suspension rod (72).

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