Tread cleaning device for train

Abstract

The present disclosure discloses a tread cleaning device for a train, comprising: a driving member having a rotatable driving portion; the lead screw assembly comprises a lead screw part and a moving part in driving connection with the lead screw part, and the moving part is connected with the driving part; the grinding block assembly is fixedly connected with the moving part; and the guide assembly comprises a guide rod and a guide cylinder, the guide rod is fixedly connected with the moving part, and the guide rod and the guide cylinder are relatively limited in the telescopic direction. According to the embodiment of the invention, the lead screw assembly connected with the driving piece is arranged, so that the moving part of the lead screw assembly drives the grinding block assembly to move along the straight line, and the grinding block assembly is guided in an auxiliary manner by the guide assembly, so that stable, efficient and high-precision linear driving can be provided for the grinding block assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of train maintenance. More particularly, the present disclosure relates to a tread cleaning device for a train. BACKGROUND

[0002] Nowadays, rail transit vehicles have become the main means of transportation, and their operation safety has always been a major concern. As an important walking component of the bogie, the wheel tread directly affects the operation safety of the train when the wheel tread appears out-of-round, scuffing and low adhesion, etc. The tread cleaning device can improve the wheel tread condition, increase the wheel-rail adhesion, and inhibit the wheel tread out-of-round phenomenon, so the tread cleaning device is an indispensable part of the bogie. The traditional pneumatic type tread cleaning system needs to be equipped with a large number of pipelines and power sources, which is heavy, low in efficiency, high in energy consumption, and requires that all pipelines cannot have leakage. Not only is the structure complex, but also the system response is slow and the control precision is low. The electric drive type tread cleaning device has not been maturely used yet, and there are technical problems such as unstable motor movement and weak piston vibration resistance in the technical route, which leads to the inability to effectively grind the wheel tread.

[0003] Therefore, there is an urgent need to provide a tread cleaning device for a train to provide high-efficiency and high-precision linear driving for the grinding block assembly. SUMMARY

[0004] In order to at least solve one or more technical problems as mentioned above, the present disclosure provides a tread cleaning device for a train.

[0005] The present disclosure provides a tread cleaning device for a train, comprising: a driving member having a rotatable driving part; a lead screw assembly comprising a lead screw part and a moving part drivingly connected with the lead screw part, the moving part being connected with the driving part; a grinding block assembly fixedly connected with the moving part; and a guide assembly comprising a guide rod and a guide cylinder, the guide rod being fixedly connected with the moving part, and the guide rod and the guide cylinder being limited in the extension and retraction direction.

[0006] In some embodiments, a housing fixedly connected with the main body of the driving member is further included, the driving member is an electric motor, the moving part comprises a lead screw nut matched with the lead screw part, and a driving cylinder sleeved on the radial outer side of the lead screw part, the driving cylinder being fixedly connected with the grinding block assembly.

[0007] In some embodiments, the housing and the guide cylinder are integrally formed.

[0008] In some embodiments, two connector sockets facing away from each other are provided on the driving member, one connector socket being used for connecting the power supply and signal input on the train, and the other connector socket being used for connecting other tread cleaning devices.

[0009] In some embodiments, the screw rod part is provided with a limiting part at one end away from the driving part, the limiting part protrudes towards the radial outside of the screw rod part, and forms a limit with the moving part.

[0010] In some embodiments, a hexagonal quick plug is further included, one end of the hexagonal quick plug is connected with the driving part, and the other end is connected with the screw rod part.

[0011] In some embodiments, a shell fixedly connected with the main body of the driving part is further included, and a pressure sensor is arranged between the moving part and the shell.

[0012] In some embodiments, the guide assembly further includes a reset spring, and a reset block is further arranged on the guide rod away from one side of the grinding block assembly, the reset spring is arranged on the outside of the guide rod, and the two sides of the reset spring abut against the guide cylinder and the reset block, respectively.

[0013] In some embodiments, the grinding block assembly includes a brake shoe holder and a grinding block detachably mounted on the brake shoe holder.

[0014] In some embodiments, the brake shoe holder is provided with a clamping device, and the grinding block is clamped in the clamping device.

[0015] Through the tread cleaning device for trains provided above, the embodiments of the present disclosure can provide stable, efficient and high-precision linear driving for the grinding block assembly by arranging the screw rod assembly connected with the driving part, driving the moving part of the screw rod assembly to move linearly, and assisting the grinding block assembly in guiding through the guide assembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings: Figure 1 An exemplary perspective view of a tread cleaning device for trains according to some embodiments of the present disclosure is shown; Figure 2 An exemplary front view of a tread cleaning device for trains according to some embodiments of the present disclosure is shown; Figure 3 An exemplary sectional view of a tread cleaning device for trains according to some embodiments of the present disclosure is shown; Figure 4 An exemplary sectional view of a tread cleaning device for trains according to some embodiments of the present disclosure is shown; Figure 5 An exemplary bottom view of a tread cleaning device for trains according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0018] It should be understood that the terms "comprising" and "including" used in the specification and claims of the present disclosure indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0019] It should also be understood that the terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. As used in the specification and claims of the present disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and claims of the present disclosure means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0020] As used in the specification and claims of the present disclosure, the term "if" can be interpreted as "when" or "upon" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted as meaning "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0021] The embodiments of the present disclosure provide a tread cleaning device for a train, which is capable of providing stable and high-precision linear driving for the grinding block assembly by setting a lead screw assembly connected with a driving member, driving the moving part of the lead screw assembly to move along a straight line, and assisting the grinding block assembly in guiding by a guide assembly.

[0022] The specific embodiments of the present disclosure will be described in detail below in combination with the drawings.

[0023] Referring to Figure 1 Fig. 4 shows an example perspective view of a tread cleaning device for a train according to some embodiments of the present disclosure, Figure 1 Fig. 5 shows an example front view of a tread cleaning device for a train according to some embodiments of the present disclosure, Figure 2 Fig. 5 shows an example front view of a tread cleaning device for a train according to some embodiments of the present disclosure, Figure 3An exemplary sectional view of a tread cleaning device for a train is shown, Figure 4 An exemplary sectional view of a tread cleaning device for a train is shown.

[0024] Some embodiments of the present disclosure provide a tread cleaning device for a train, which comprises a driving member 17, a screw rod assembly 20, a grinding block assembly 50 and a guide assembly 40. The driving member 17 has a rotatable driving part. The screw rod assembly 20 comprises a screw rod part 11 and a moving part 2 drivingly connected with the screw rod part 11, and the moving part 2 is connected with the driving part. The grinding block assembly 50 is fixedly connected with the moving part 2. The guide assembly 40 comprises a guide rod 3 and a guide cylinder 41, the guide rod 3 is fixedly connected with the moving part 2, and the guide rod 3 is limited in the extension and retraction direction relative to the guide cylinder 41.

[0025] Specifically, the driving member 17 can be a motor, a hydraulic motor, a rotary cylinder or the like driving mechanism capable of providing rotary driving. The driving part is the output end of the driving member 17, which is fixed to the screw rod end of the screw rod assembly 20 by means of bolt connection or the like, so as to transmit the driving. And through the thread cooperation between the screw rod part 11 and the moving part 2, the rotary motion of the driving part can be converted into the linear motion of the moving part 2. The grinding block assembly 50 is connected with the moving part 2 by means of bolt connection or the like, so that the linear motion of the moving part 2 can synchronously drive the grinding block assembly 50 to move towards or away from the tread. The guide rod 3 of the guide assembly 40 is arranged in parallel with the screw rod, one end of the guide rod 3 towards the grinding block assembly 50 is fixedly connected with the moving part 2, and the other end of the guide rod 3 is limited in the radial direction relative to the guide cylinder 41. The driving connection between the screw rod part 11 and the moving part 2 can realize the accurate conversion of driving force, and provide stable and high-precision linear driving for the grinding block assembly 50. And the radial limiting structure of the guide assembly 40 avoids the radial deviation or torsion of the moving part 2 during the movement, thereby improving the fitting precision of the grinding block 1 and the train tread, and improving the cleaning effect.

[0026] In this embodiment, the housing 4 is further fixedly connected with the main body of the driving member 17, the driving member 17 is an electric motor, the moving part 2 comprises a screw nut 13 matched with the screw rod part 11, and a driving cylinder coaxially sleeved on the radial outer side of the screw rod and fixedly connected with the grinding block assembly 50. Specifically, the driving member 17 is an electric motor, the housing 4 is fixedly connected with the main body of the electric motor by bolt connection or other fixed connection, and the output shaft of the electric motor is fixed with the screw rod of the screw rod assembly 20. The moving part 2 comprises the screw nut 13 and the driving cylinder, the screw nut 13 is threadedly matched with the screw rod part 11 to form a driving cooperation, and the driving cylinder is coaxially sleeved on the radial outer side of the screw rod and fixed with the grinding block assembly 50 by welding, bolt connection or other connection. Thus, the housing 4 and the main body of the driving member 17 jointly enclose the screw rod assembly 20 and the connecting part of the driving part, so as to block the invasion of dust and other impurities in the train running process into the internal transmission structure. By setting the driving member 17 as an electric motor, the response of the tread cleaning device is sensitive and the power output is stable. Compared with the scheme of setting the cylinder as the driving member 17, the traditional pneumatic tread cleaning system needs to be equipped with a large number of pipelines and power sources, while the related wiring structure required by the electric motor as the power source is relatively simple. By the cooperation of the electric motor, the screw nut 13 and the screw rod part 11, the movement speed and stroke of the moving part 2 can be accurately adjusted, and the quality of the tread cleaning work is improved. Further, the driving cylinder is sleeved on the outer side of the screw rod and fixed with the grinding block assembly 50, which not only enhances the structural rigidity of the moving part 2, but also improves the sealing protection of the screw rod assembly 20.

[0027] In addition, the inner cavity of the housing 4 can be arranged to form a radial limit with the outer periphery of the driving cylinder, so that the axial movement of the driving cylinder is stably guided by the housing 4, reducing the probability of tilting or jamming of the driving cylinder during movement, and further making the cleaning action of the grinding block assembly 50 more smooth.

[0028] Further or optionally, the housing 4 and the guide cylinder 41 are integrally formed. Specifically, the housing 4 and the guide cylinder 41 can be integrally formed by casting, integral machining or other methods to form a complete rigid member. By integrally forming the housing 4 and the guide cylinder 41, the assembly error can be reduced, the guiding accuracy of the guide assembly 40 can be improved, and the accuracy of the cleaning action of the grinding block assembly 50 can be ensured. Compared with the structure of multiple components, the integrally formed structure has higher structural strength, avoids relative displacement or loosening of the guide cylinder 41 and the housing 4, and improves the stability and reliability of the device as a whole. In addition, the number of parts and the assembly process are also reduced, the production process is simplified, and the manufacturing cost and the risk of assembly error are reduced. At the same time, the sealing performance of the integrally formed structure is better, which can further enhance the sealing and protection effect of the internal components.

[0029] In this embodiment, two connector sockets 7 are arranged on the driving member 17, one of which is used to connect the power supply and signal input on the train, and the other is used to connect other tread cleaning devices. Among them, the two connector sockets 7 are fixedly installed on both sides of the housing 4 of the driving member 17, one of which can be connected with the power supply system and control system of the train through wires, and the other is connected with the corresponding interface of other tread cleaning devices through wires. The orientations of the two connector sockets 7 are opposite to each other to form a "one-in and one-out" arrangement. By arranging the two connector sockets 7 away from each other, a plurality of tread cleaning devices can be connected in series, which facilitates the quick installation, disassembly and maintenance of the device. In the case of connecting a plurality of tread cleaning devices in series, a plurality of tread cleaning devices can be connected in series by simply connecting the head and tail, thereby simplifying the wiring under the train and facilitating operation and maintenance. Further, the number of cleaning devices can be flexibly configured according to the number of train wheel pairs, enhancing the versatility of the tread cleaning device.

[0030] In this embodiment, the limit piece 10 is arranged at the end of the screw rod part 11 away from the driving member 17, and the limit piece 10 protrudes towards the radial outside of the screw rod part 11 and limits the movement of the moving part 2. Specifically, the limit piece 10 can be a limit plate or a limit block with a radial dimension greater than the diameter of the screw rod, which is fixedly installed on the end of the screw rod part 11 away from the driving member 17 by threaded connection, welding or clamping, etc. When the moving part 2 moves to the limit position along the screw rod part 11 away from the driving member 17, the protruding part of the limit piece 10 can abut against the inner end surface of the moving part 2, thereby limiting the further movement of the moving part 2. Thus, the limit piece 10 limits the maximum stroke of the moving part 2, prevents the moving part 2 from moving out of position, reduces the possibility of mechanical jamming, component falling off and other problems, and ensures the safety of the device operation. In addition, in some embodiments not shown, the limit piece 10 can be at least partially made of a material with elasticity, so that the contact between the limit piece 10 and the moving part 2 can buffer the impact force of the moving part 2, avoiding damage to the moving part 2 and the limit piece 10 caused by the collision between the moving part 2 and the limit piece 10.

[0031] Referring to Figure 5 , Figure 5An exemplary perspective view of the tread cleaning device for train according to some embodiments of the present disclosure is shown. In this embodiment, a hexagonal quick connector 16 is also included, which is connected to the driving part at one end and to the screw rod part 11 at the other end. The hexagonal quick connector 16 is provided with a hexagonal interface at both ends adapted to the driving part and the screw rod part 11, and correspondingly, the end of the driving part and the screw rod part 11 is also provided with a hexagonal protrusion or groove. The hexagonal quick connector 16 is coaxially connected to the driving part and the screw rod part 11 by interference fit, auxiliary fixing with a set screw, etc. By using the hexagonal quick connector 16 to connect the driving part and the screw rod part 11, relative slippage at the connection site can be avoided, and the synchronous response performance of the transmission can be improved. Compared with the technical solution of using a shaft coupling or other connecting components for connection, the quick connection structure of the hexagonal quick connector 16 simplifies the assembly process of the driving part and the screw rod part 11, eliminates the need for complex alignment and fixing procedures, improves assembly efficiency, and reduces labor costs. In addition, the torque transmission capacity of the hexagonal interface is relatively stronger, which can further reduce transmission loss. The connection structure using the hexagonal quick connector 16 is more convenient for maintenance and component replacement of the device, and improves the maintenance convenience.

[0032] In this embodiment, a housing 4 is also included which is fixedly connected to the main body of the driving member 17, and a pressure sensor 15 is arranged between the moving part 2 and the housing 4. The pressure sensor 15 is installed at a predetermined position between the moving part 2 and the housing 4 by means of threaded connection, adhesion or bracket fixation, etc. The detection end of the pressure sensor 15 abuts against the moving part 2 and the housing 4 along the extension direction of the screw rod, so as to be able to detect the pressure change of the moving part 2 along the extension direction of the screw rod in real time. The pressure sensor 15 can feedback the contact pressure between the grinding block assembly 50 and the train tread in real time, and by electrically connecting the pressure sensor 15 with the driving member 17 and / or the control system, the output power of the driving member 17 can be flexibly adjusted according to the pressure parameter, so that the contact pressure is always maintained within the optimal value range, avoiding excessive wear of the grinding block 1 and damage to the tread due to excessive pressure, or incomplete cleaning due to insufficient pressure. In addition, when the pressure value is abnormal, the pressure sensor 15 can send out a fault alarm signal in time, improving the timeliness and reliability of the device maintenance.

[0033] In this embodiment, the guide assembly 40 further comprises a reset spring 8, and a reset block 9 is arranged on the guide rod 3 away from the side of the grinding block assembly 50. The reset spring 8 is arranged outside the guide rod 3, and the two sides of the reset spring 8 abut against the guide cylinder 41 and the reset block 9, respectively. Specifically, the reset block 9 is fixed to the end of the guide rod 3 away from the grinding block assembly 50 by welding, threaded connection or the like. The reset spring 8 is sleeved outside the guide rod 3, and one end of the reset spring 8 abuts against the axial inner end face of the side wall of the guide cylinder 41 close to the grinding block assembly 50, and the other end of the reset spring 8 abuts against the axial inner end face of the reset block 9 facing the grinding block assembly 50. Thus, when the cleaning action is performed, the guide rod 3 moves with the moving part 2 towards the grinding block assembly 50, and the reset block 9 compresses the reset spring 8 in the axial direction. After the cleaning action is completed, the driving member 17 stops outputting, and the spring force accumulated by the reset spring 8 acts on the reset block 9 to push the guide rod 3 to move along the guide cylinder 41 away from the tread, thereby driving the moving part 2 and the grinding block assembly 50 to automatically reset. Without the need to additionally set a reset driving mechanism, the device structure is simplified, the energy consumption is reduced, and the safety of the product is mechanically guaranteed. Moreover, the elastic support of the reset spring 8 can buffer the impact force when the grinding block assembly 50 contacts the tread, reduce the component wear and vibration caused by rigid collision, and improve the stability of the device operation.

[0034] In this embodiment, the grinding block assembly 50 comprises a brake shoe 5 and a grinding block 1 detachably mounted on the brake shoe 5. Specifically, the brake shoe 5 is a structural member for mounting the grinding block 1, which can be provided with a grinding block 1 connecting portion matched with the shape of the grinding block 1. The brake shoe 5 can be fixedly connected with the moving part 2 by bolt connection, welding or the like. The grinding block 1 can be detachably assembled on the grinding block 1 connecting portion of the brake shoe 5 by clamping, bolt connection or the like. During the cleaning process, the grinding block 1 will be worn due to long-term wear during use, and the detachable design facilitates the individual replacement of the grinding block 1, thereby reducing the use cost and maintenance cost. The brake shoe 5 provides stable support for the grinding block 1, ensures uniform stress of the grinding block 1 during the cleaning process, avoids deformation or falling of the grinding block 1, and improves the stability of the cleaning process.

[0035] Further or alternatively, the shoe plate 5 is provided with a clamping device, and the grinding block 1 is clamped on the clamping device. The connecting portion of the grinding block 1 is provided with a clamping structure such as a clamping protrusion, a clamping hole, etc. that is adapted to the grinding block 1, so that the grinding block 1 can be embedded in the clamping device by manual pressing, sliding, etc. and disassembled without additional tools. Compared with other ways such as bolt connection, the disassembly and assembly of the grinding block 1 and the shoe plate 5 combined by clamping connection is faster and more convenient, which can further improve the efficiency of replacing the grinding block 1 and reduce the difficulty of maintenance, and is especially suitable for installation environments with limited space and difficult installation tools. In the case of using an elastic clamping structure, the elastic clamping force of the clamping device can ensure the tightness of the connection between the grinding block 1 and the shoe plate 5, avoid loosening or falling of the grinding block 1 due to vibration, impact, etc. during cleaning, and ensure the safety and stability of the cleaning process.

[0036] The tread cleaning device according to some embodiments of the present disclosure drives the moving part of the lead screw assembly to drive the grinding block assembly to move linearly, and uses the guide assembly to assist in guiding the grinding block assembly, which can provide stable and high-precision linear driving for the grinding block assembly.

[0037] Although the embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that many modifications, changes and substitutions can be made to the embodiments without departing from the idea and spirit of the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein can be employed in practicing the present disclosure. The appended claims are intended to define the scope of protection of the present disclosure and thus cover equivalents or alternatives within the scope of the claims.

Claims

1. A tread cleaning device for trains, characterized in that, include: The driving component (17) has a rotatable driving part; A lead screw assembly (20) includes a lead screw portion (11) and a movable portion (2) drivenly connected to the lead screw portion (11), the movable portion (2) being connected to the drive portion; A grinding block assembly (50), which is fixedly connected to the moving part (2); and The guide assembly (40) includes a guide rod (3) and a guide cylinder (41), the guide rod (3) being fixedly connected to the moving part (2), and the guide rod (3) and the guide cylinder (41) being relatively limited in the telescopic direction.

2. The tread cleaning device according to claim 1, characterized in that, It also includes a housing (4) fixedly connected to the main body of the drive member (17), the drive member (17) being a motor, the moving part (2) including a lead screw nut (13) cooperating with the lead screw part (11), and a drive cylinder sleeved on the radially outer side of the lead screw part (11), the drive cylinder being fixedly connected to the grinding block assembly (50).

3. The tread cleaning device according to claim 2, characterized in that, The housing (4) and the guide cylinder (41) are integrally formed.

4. The tread cleaning device according to claim 2, characterized in that, The drive unit (17) is provided with two mutually opposite connector sockets (7). One connector socket (7) is used to connect the vehicle power supply and signal input, and the other connector socket (7) is used to connect other tread cleaning devices.

5. The tread cleaning device according to claim 1, characterized in that, A limiting member (10) is provided at one end of the lead screw (11) away from the drive member (17). The limiting member (10) protrudes radially outward toward the lead screw (11) and forms a limiting with the moving part (2).

6. The tread cleaning device according to claim 1, characterized in that, It also includes a hexagonal quick connector (16), one end of which is connected to the drive unit and the other end is connected to the lead screw unit (11).

7. The tread cleaning device according to claim 1, characterized in that, It also includes a housing (4) that is fixedly connected to the main body of the drive (17), and a pressure sensor (15) is provided between the moving part (2) and the housing (4).

8. The tread cleaning device according to claim 1, characterized in that, The guide assembly (40) also includes a reset spring (8), and the guide rod (3) is also provided with a reset stop (9) on the side away from the grinding block assembly (50). The reset spring (8) is located on the outside of the guide rod (3), and the two sides of the reset spring (8) abut against the guide cylinder (41) and the reset stop (9) respectively.

9. The tread cleaning device according to any one of claims 1 to 8, characterized in that, The grinding block assembly (50) includes a brake shoe holder (5) and a grinding block (1) detachably mounted on the brake shoe holder (5).

10. The tread cleaning device according to claim 9, characterized in that, The brake shoe holder (5) is provided with a locking device, and the grinding block (1) is locked in the locking device.

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