CN218643087U - Lifting mechanism of high-speed rail polishing trolley for urban rail transit - Google Patents

Abstract

The utility model discloses a lifting mechanism of a high-speed grinding trolley for urban rail transit steel rails, which comprises a fixed frame arranged above a grinding frame, wherein the grinding frame is provided with a suspension shaft; two sides of the polishing frame are connected with the fixed frame through lifting components, and the lifting components are arranged on two sides of the fixed frame; the lifting assembly comprises two fourth telescopic pieces, and a suspension assembly is arranged between the two fourth telescopic pieces. Lifting and lowering of the polishing trolley are realized through the fourth telescopic piece, so that the problems of device failure and the like caused by asynchronous operation in the high-speed running process are avoided; the polishing trolley is stably placed after being lifted through the matching of the suspension assembly and the suspension shaft, and the safety after being lifted is guaranteed; the fourth telescopic piece is locked when the pressure and the stroke meet the requirements through the first state monitoring sensor, and the stability of the polishing equipment in the operation process is ensured; the automatic monitoring of the running position of the suspension rod is realized through the second state monitoring sensor and the third state monitoring sensor, and the reliability of the working state of the suspension assembly is ensured.

Description

Be used for urban rail transit rail high speed dolly elevating system that polishes

Technical Field

The utility model relates to a rail grinding machanism technical field particularly, relates to a dolly elevating system polishes at a high speed for urban rail transit rail.

Background

The steel rail is an important component of urban rail transit, and the quality of the state of the steel rail directly influences the running safety and stability of an urban rail transit vehicle and the riding comfort of passengers. The service performance of the steel rail is affected by factors such as the dynamic action of vehicles, the influence of external environment, the quality of the steel rail and the like, and besides the generation of the profile abrasion of the steel rail, various diseases such as fatigue cracks, stripping and block falling, wave-shaped abrasion and the like can be generated on the surface of the steel rail. If the surface damage of the steel rail is not treated in time, not only can the wheel-rail relationship be deteriorated to cause the damage of a train or a track part, but also the problems of accelerated development of the steel rail damage, shortened service life of the steel rail, increased operation and maintenance cost and the like can be caused, and the steel rail damage can be developed to a certain degree and even can influence the driving safety.

In recent years, with the continuous opening of newly added urban rail transit lines and the annual increase of passenger flow, various diseases of steel rails are gradually presented in the operation process, the increasingly serious problem of rail corrugation is caused, and the safety and the comfort of urban rail transit operation are seriously influenced. The main reasons are related to the operation conditions of urban rail transit, such as complex line conditions, more small-radius curves, various vibration damping rails, frequent acceleration and deceleration of vehicles, high driving density, high safety requirements, poor maintenance conditions, high tunnel specific gravity and the like. The wave length of the urban rail transit rail corrugation is more than that of the short wave corrugation below 100mm, vibration impact caused by the wave length is severe, and the development rate is high.

The rail grinding is the most important rail maintenance mode in the service process of the rail, and has important functions of eliminating the surface defects of the rail, reducing the contact stress, controlling the damage, improving the guidance, reducing the noise, improving the riding comfort and the like. The rail grinding is originated in the fifties of the last century, and has become an effective rail maintenance method recognized by railways of various countries in the world after decades of development, and the rail grinding concept also develops from the initial only reparative grinding to the current preventive grinding, pre-grinding and other modes.

The urban rail transit high-speed steel rail grinding vehicle is high-efficiency grinding equipment which mainly aims at preventive grinding and pre-grinding of steel rails of urban rail transit lines. When the steel rail is quickly ground, the grinding stone is dragged on the steel rail without power with a certain attack angle for grinding. Compared with the traditional active rail grinding wagon with a grinding stone driven by a motor at the operating speed of less than 10km/h in urban rail transit, the urban rail transit high-speed rail grinding wagon has the capability of quick operation and extremely high operating efficiency.

In a traditional grinding trolley lifting device, a lifting oil cylinder and a grinding trolley are usually fixedly connected, the structure does not consider the transverse deviation of the grinding trolley relative to the whole grinding trolley when the grinding trolley passes through a curve track, and a hydraulic cylinder can bear large transverse force when the grinding trolley passes through a curve, so that the grinding trolley has the risk of derailment; the structure cannot accurately monitor and control the polishing pressure and the polishing stroke, so that a large difference exists between the actual polishing operation state and the preset state, and a stable and reliable polishing effect cannot be realized; the limiting hook device is not arranged in the traditional grinding trolley lifting device, and when the grinding trolley lifting device in a non-working lifting state fails in the driving process, the grinding trolley has the risk of falling to a steel rail, so that the operation and the line safety are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a purpose provides a dolly elevating system that polishes at a high speed for urban rail transit rail, it has solved the following problem that exists among the prior art:

1. the whole lifting of the polishing frame cannot be quickly realized in the high-speed driving process, and the problems of device failure, uncontrollable state and the like are easily caused by asynchronism in the lifting operation;

2. the lifted polishing frame cannot be stably placed, when the lifting device fails, the polishing frame can fall on a steel rail or other dangerous conditions, and the safety of the lifted polishing trolley cannot be guaranteed;

in order to achieve the above technical object, the technical solution provided by the present application includes:

the utility model provides a lifting mechanism of a high-speed grinding trolley for urban rail transit steel rails, which comprises a grinding frame and a fixed frame, wherein the fixed frame is arranged above the grinding frame, and a suspension shaft is arranged on the grinding frame; the polishing frame is connected with the fixed frame through a lifting assembly; the lifting assembly comprises two fourth telescopic pieces, a suspension assembly is arranged between the two fourth telescopic pieces, and the suspension shaft and the suspension assembly are correspondingly arranged.

In some embodiments of the disclosure, the lifting assembly further comprises a connecting block, the connecting block is fixedly connected with the polishing frame, a connecting groove is formed in the connecting block, and the fourth telescopic piece is rotatably connected with the connecting groove.

In some embodiments of the present disclosure, the suspension assembly includes a fifth expansion piece and a suspension rod, one end of the fifth expansion piece and one end of the suspension rod are both rotatably connected to the fixed frame, the other end of the fifth expansion piece is rotatably connected to the other end of the suspension rod, and the other end of the suspension rod is provided with a suspension groove matched with the suspension shaft.

In some embodiments of the present disclosure, a first condition monitoring sensor is disposed on each of the fourth and fifth telescoping members.

In some embodiments of the present disclosure, a second condition monitoring sensor is disposed on the sanding frame, and a third condition monitoring sensor is disposed on the fixed frame.

In some embodiments of the present disclosure, a chain block is further disposed between the sanding frame and the fixing frame.

Advantageous effects

1. The fourth telescopic pieces which are symmetrically arranged can quickly realize the integral lifting of the polishing frame in the high-speed driving process, and the problems of device failure, uncontrollable state and the like caused by asynchronism in the lifting operation are avoided;

2. through the matching of the suspension assembly and the suspension shaft, the polishing frame can be stably placed after being lifted in the high-speed running process, the polishing frame is prevented from falling on a steel rail or other dangerous conditions when the lifting device fails after being lifted, and the safety of the polishing trolley after being lifted is guaranteed;

3. the first state monitoring sensor arranged on the fourth telescopic piece can realize locking when the pressure and the stroke meet the operation requirements, and the stability of the polishing equipment in the polishing operation process is ensured; the automatic monitoring of the running position of the suspension rod can be realized through the second state monitoring sensor and the third state monitoring sensor which are respectively arranged on the polishing frame and the fixed frame, and the fourth telescopic piece and the fifth telescopic piece are controlled by matching with the monitoring result, so that the reliability of the working state of the suspension assembly is ensured;

4. through the setting of chain block, can be when the emergency of operation in-process dolly derailment or elevating gear inefficacy of polishing, the accessible chain block will polish the dolly and hoist, need not extra auxiliary assembly and can realize quick autonomic rescue, from not influencing the circuit operation.

Drawings

Fig. 1 is one of the schematic structural diagrams of the present invention;

fig. 2 is a second schematic structural diagram of the present invention;

fig. 3 is a third schematic view of the present invention.

Icon: 1-grinding the frame; 2-a suspension shaft; 3-a lifting assembly; 301-a fourth telescoping member; 302-connecting block; 303-connecting grooves; 4-a suspension assembly; 401-a fifth telescoping piece; 402-a hanger bar; 403-hanging groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the present invention is further described below with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1-3, the utility model provides a lifting mechanism of a high-speed rail grinding trolley for urban rail transit, which comprises a grinding frame 1 and a fixed frame, wherein the fixed frame is arranged above the grinding frame 1, and a suspension shaft 2 is arranged on the grinding frame 1; two sides of the grinding frame 1 are connected with the fixed frame through a lifting assembly 3; the lifting assembly 3 comprises two fourth telescopic pieces 301, a suspension assembly 4 is arranged between the two fourth telescopic pieces 301, and the suspension shaft 2 is arranged corresponding to the suspension assembly 4.

It should be noted that, in the conventional lifting device for the polishing trolley, the lifting cylinder and the polishing trolley are usually fixedly connected, the structure does not consider the lateral deviation of the polishing trolley relative to the whole grinding trolley when the polishing trolley passes through a curve track, and when the polishing trolley passes through a curve, the hydraulic cylinder can bear a large lateral force, so that the polishing trolley has a derailment risk; the structure cannot accurately monitor and control the polishing pressure and the polishing stroke, so that a large difference exists between the actual polishing operation state and the preset state, and a stable and reliable polishing effect cannot be realized; on the other hand, when elevating gear became invalid, the dolly of polishing had the risk that drops to the rail, influences operation and line safety. The grinding frame is provided with a grinding frame 1 and a fixed frame, the number of the suspension shafts 2 is preferably 4, the 4 suspension shafts 2 are in a group in pairs, the two groups of suspension shafts are respectively arranged on two parallel side surfaces of the grinding frame 1, two sides of the grinding frame 1 are connected with the fixed frame through lifting assemblies 3, each lifting assembly 3 comprises two fourth telescopic parts 301, namely the top end of each fourth telescopic part 301 is connected with the fixed frame, the two suspension assemblies 4 are arranged between the fourth telescopic parts 301, the suspension assemblies 4 are preferably arranged into 4 groups, the 4 groups of suspension assemblies 4 are respectively arranged corresponding to the 4 suspension shafts 2, namely one suspension shaft 2 corresponds to one suspension assembly 4, when the lifting assembly 3 lifts the grinding frame, the suspension shafts 2 are connected with the suspension assemblies 4, so that a lifted trolley can be stably placed on the suspension assemblies, the stability of the whole grinding frame after lifting 1 is kept, and the dangerous situation that the trolley is inclined or collapsed or even dropped in the high-speed driving process is avoided.

In detail, the working mode of the application is as follows: when the rail needs to be polished, the fourth telescopic part 301 is shortened to lift the polishing frame 1 to the highest point, the suspension shaft 2 is separated from the suspension assembly 4, the suspension assembly 4 changes the angle and is separated from the polishing frame 1, the fourth telescopic part 301 is extended to lower the polishing frame 1, and when the polishing frame 1 reaches a preset position (in some preferred embodiments, the preset position comprises the condition that the polishing frame 1 is in contact with the rail or the polishing frame 1 is in contact with the rail and keeps a certain pressing force), the fourth telescopic part is locked; when the grinding of the steel rail needs to be finished, the fourth telescopic piece 301 is shortened to lift the highest point of the grinding frame 1, the angle of the suspension assembly 4 is changed to be close to the grinding frame 1, the fourth telescopic piece 301 is extended to enable the grinding frame 1 to descend, and when the suspension shaft 2 is connected with the suspension assembly 4, the fourth telescopic piece is locked; according to the polishing trolley, the fourth telescopic pieces are symmetrically arranged, so that the integral lifting of the polishing trolley can be quickly realized in the high-speed driving process, and the problems of device failure, uncontrollable state and the like caused by asynchronism in lifting operation are avoided; through the cooperation of suspension assembly and suspension shaft, can realize playing to rise the firm of back dolly of polishing and place at high-speed the in-process of traveling, when having avoided playing to rise back elevating gear inefficacy, the dolly of polishing appears dropping on the rail or other dangerous condition, has ensured the security that plays to rise the back dolly of polishing.

It should be noted that, all the telescopic members of the present invention, including but not limited to any one of a hydraulic cylinder, an oil cylinder, an air cylinder, and a rack and pinion, meet the requirements of the present invention as long as they can perform a telescopic function under control, and therefore, are not further limited, and preferably, in order to simplify the energy supply system of the whole device, the form of the telescopic members is as uniform as possible, for example, all the telescopic members are supplied with hydraulic energy, and the telescopic members are preferably hydraulic cylinders.

Example 2

On the basis of embodiment 1, a lifting mechanism of a high-speed grinding trolley for urban rail transit steel rails is provided, which specifically comprises the following components: lifting unit 3 still includes connecting block 302, connecting block 302 with frame 1 fixed connection polishes, just connecting groove 303 has been seted up on the connecting block 302, fourth extensible member 301 with connecting groove 303 rotates and is connected. It should be noted that, this application sets up connecting block 302, connecting groove 303, fourth extensible member 301, the equal fixedly connected with connecting block 302 in both ends of frame 1 both sides of polishing, be provided with four connecting blocks 302 on frame 1 of polishing promptly, fourth extensible member 301 passes through connecting groove 303 and is connected with connecting block 302, preferably, be connected through joint bearing between fourth extensible member 301 and the connecting groove 303, then can let rotate between fourth extensible member 301 and the connecting groove 303, make the movable track of fourth extensible member 301 be the curve, this freedom is through curve technique, can let fourth extensible member 301 realize horizontal and fore-and-aft certain free offset, with the lateral deviation of the relative whole car of dolly of polishing when the adaptation passes through the curve, and then make the car of polishing pass through ability greatly increased.

Example 3

On the basis of embodiment 2, provide a dolly elevating system that polishes at a high speed for urban rail transit rail, specifically do: the suspension assembly 4 comprises a fifth telescopic piece 401 and a suspension rod 402, one end of the fifth telescopic piece 401 and one end of the suspension rod 402 are rotatably connected with the fixed frame, the other end of the fifth telescopic piece 401 is rotatably connected with the other end of the suspension rod 402, and the other end of the suspension rod 402 is provided with a suspension groove 403 matched with the suspension shaft 2. It should be noted that, in the present application, a fifth expansion element 401, a suspension rod 402, and a hanging groove 403 are provided, and in detail, one end of the fifth expansion element 401 and one end of the suspension rod 402 are both rotationally connected to the fixed frame, that is, the positions of the top ends of the fifth expansion element 401 and the suspension rod 402 are fixed and unchanged, and the other end of the fifth expansion element 401 and the other end of the suspension rod 402 rotate, so that a V-shaped structure with a variable angle is formed between the fifth expansion element 401 and the suspension rod 402, and in actual operation, because the positions of the top ends of the fifth expansion element 401 and the suspension rod 402 are fixed and unchanged, the fifth expansion element 401 is controlled to extend and retract to change the angle of the suspension rod 402 and to approach or leave the polishing frame 1. Specifically, one of the working modes of the suspension assembly 4 is that the fifth expansion element 401 extends to be longer, and drives the suspension rod 402 to move towards the direction close to the grinding frame 1; the second mode of operation of the suspension assembly 4 is that the fifth telescopic element 401 retracts and shortens, and drives the suspension rod 402 to move in a direction away from the grinding frame 1. It is worth explaining that, according to the polishing trolley lifting device, through the cooperation of the fifth telescopic piece 401 and the fourth telescopic piece 301, the suspension shaft 2 of the lifted polishing trolley falls into the limiting suspension groove 403, the polishing trolley is further prevented from falling onto a steel rail or other dangerous situations when the lifting device fails, and the operation safety of rail transit is guaranteed.

Example 4

On the basis of embodiment 3, provide a dolly elevating system that polishes at a high speed for urban rail transit rail, specifically do: the fourth telescoping piece 301 is provided with a first condition monitoring sensor. It should be noted that, the first state monitoring sensor is used for sensing and controlling the telescopic length of the fourth extensible member 301 and the fifth extensible member 401, so that the fourth extensible member 301 and the fifth extensible member 401 can be extended to a specified length, the telescopic work is stopped and locked, the lifting and the descending of the polishing frame can be efficiently and quickly completed, and the stability of the polishing device in the polishing process can be indirectly ensured. It should be noted that the first condition monitoring sensor may be a pressure sensor and/or a displacement sensor. In other preferred embodiments, in order to automatically monitor the operating position of the suspension rod and ensure the reliability of the operating state of the suspension assembly, it is considered that a second state monitoring sensor is provided on the grinding frame 1 and a third state monitoring sensor is provided on the fixed frame. The following is a detailed description of the working process: a first approaching threshold value is arranged in the second state monitoring sensor, when the suspension rod 402 approaches the polishing frame 1 and enters the first approaching threshold value, the suspension rod 402 is judged to be in place, the polishing trolley can be lowered to enable the suspension shaft 2 to fall into the suspension groove 403, and the lifted polishing trolley is stably placed; a second approach threshold value is arranged in the third state monitoring sensor, when the suspension rod 402 is far away from the grinding frame 1 and enters the second approach threshold value, the suspension rod 402 is judged to be in place, and the grinding trolley can be lowered so that when the grinding frame 1 reaches a preset position (in some preferred embodiments, the preset position comprises that the grinding frame 1 is in contact with a rail or the grinding frame 1 is in contact with the rail and keeps a certain pressing force), the grinding equipment can grind the steel rail; this embodiment has realized the automatic monitoring to hanging rod running position, and the cooperation monitoring result is controlled the fourth extensible member, ensures to hang the reliability of subassembly operating condition. It should be understood that the second and third condition monitoring sensors may be any one of a displacement sensor and a proximity switch.

And a chain block is arranged between the grinding frame 1 and the fixed frame. It should be noted that this structure has set up the chain block device, through this independently quick rescue technique, takes place the dolly derail and when the emergency that hydraulic control system became invalid in the operation process of polishing, accessible hand chain block will polish the dolly and hang up, need not extra auxiliary assembly and can realize quick independently rescue, from the safe operation that does not influence the circuit. Preferably, a hoist may be provided at the fourth corner of the top of the sanding frame 1.

One of the working modes of this embodiment is as follows: when the track needs to be polished, the fourth telescopic piece 301 is shortened to lift the polishing frame 1 to the highest point, so that the suspension shaft 2 is separated from the suspension groove 403, the fifth telescopic piece is shortened to change the angle of the suspension rod 402 so as to be far away from the polishing frame 1, when the suspension rod 402 enters a second approach threshold value built in the third state monitoring sensor, the suspension rod 402 is judged to be in place to run, the polishing frame 1 can be lowered, the fifth telescopic piece is locked, the fourth telescopic piece 301 is controlled to extend to enable the polishing frame 1 to be lowered, and when the polishing frame 1 reaches a preset position, the fourth telescopic piece is locked; when the grinding of the steel rail needs to be finished, the fourth telescopic piece 301 is shortened to lift the highest point of the grinding frame 1, the fifth telescopic piece extends to change the angle of the suspension rod 402 so as to be close to the grinding frame 1, when the suspension rod 402 enters a first approach threshold value built in the second state monitoring sensor, the suspension rod 402 is judged to run in place, the grinding frame 1 can be lowered to enable the suspension shaft 2 to fall into the suspension groove 403, the fifth telescopic piece is locked, the fourth telescopic piece 301 is controlled to extend to enable the grinding frame 1 to fall, when the suspension shaft 2 falls into the suspension groove 403, the fourth telescopic piece is locked, and the stable placement of the lifted grinding trolley is completed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a be used for urban rail transit rail high speed dolly elevating system that polishes which characterized in that includes: the polishing machine comprises a polishing frame (1) and a fixed frame, wherein the fixed frame is arranged above the polishing frame (1), and a suspension shaft (2) is arranged on the polishing frame (1);

the grinding frame (1) is connected with the fixed frame through a lifting assembly (3);

the lifting assembly (3) comprises two fourth telescopic pieces (301), a suspension assembly (4) is arranged between the two fourth telescopic pieces (301), and the suspension shaft (2) and the suspension assembly (4) are correspondingly arranged.

2. The lifting mechanism of the high-speed rail grinding trolley for urban rail transit according to claim 1, wherein the lifting assembly (3) further comprises a connecting block (302), the connecting block (302) is fixedly connected with the grinding frame (1), a connecting groove (303) is formed in the connecting block (302), and the fourth telescopic member (301) is rotatably connected with the connecting groove (303).

3. The lifting mechanism of the urban rail transit steel rail high-speed grinding trolley for the urban rail transit steel rail according to claim 1, wherein the suspension assembly (4) comprises a fifth telescopic piece (401) and a suspension rod (402), one end of the fifth telescopic piece (401) and one end of the suspension rod (402) are both rotatably connected with the fixed frame, the other end of the fifth telescopic piece (401) is rotatably connected with the other end of the suspension rod (402), and the other end of the suspension rod (402) is provided with a suspension groove (403) matched with the suspension shaft (2).

4. The lifting mechanism of the urban rail transit steel rail high-speed grinding trolley according to claim 1, wherein a first state monitoring sensor is arranged on the fourth telescopic member (301).

5. The lifting mechanism of the high-speed grinding trolley for the urban rail transit steel rails as claimed in claim 3, wherein a second state monitoring sensor is arranged on the grinding frame (1), and a third state monitoring sensor is arranged on the fixed frame.

6. The lifting mechanism of the high-speed grinding trolley for the urban rail transit steel rails as claimed in claim 1, wherein a chain block is further arranged between the grinding frame (1) and the fixed frame.

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