End cover assembly, air pressure driving device, wheel tread cleaning device and railway vehicle

Abstract

The application provides a cover assembly, a gas pressure driving device, a wheel tread cleaning device and a railway vehicle. The end cover assembly comprises: a cylinder cover having an inner side end face arranged towards a cylinder and an outer side end face arranged away from the cylinder; a first externally threaded column body extending outwardly is arranged on the inner side end face of the cylinder cover and is used for cooperating with the cylinder for installation; a second externally threaded column body extending outwardly is arranged on the outer side end face of the cylinder cover; the cylinder cover has a through mounting hole extending through the first externally threaded column body and the second externally threaded column body and used for arranging a gas core and an elastic pull rod; and a gland cover having an inner side end face arranged towards the cylinder cover and an outer side end face arranged away from the cylinder cover; a threaded hole cooperating with the second externally threaded column body is arranged on the inner side end face of the gland cover; a throttling vent hole is arranged between the threaded hole and the outer side end face of the gland cover; wherein a first mounting groove is further arranged between the inner side end face of the gland cover and the threaded hole; in an assembled state, the inner side end face of the gland cover abuts against the outer side end face of the cylinder cover and provides sealing through a sealing ring arranged in the first mounting groove.

Description

Technical Field

[0001] The present application relates to the technical field of wheel tread cleaning devices for rail vehicles, and in particular to an end cover assembly, a pneumatic drive device, a wheel tread cleaning device, and a rail vehicle. Background Art

[0002] Rail vehicles have become a major form of transportation, and their operational safety has long been a focus of public attention. Wheels, as crucial contouring components within bogies, are directly impacted by tread out-of-round, scratches, and low adhesion, among other issues. As a standard feature of rail vehicle bogies, tread cleaning devices clean the tread, enhancing wheel-rail adhesion and performing wheel shaping. This effectively improves the tread condition, suppresses out-of-roundness, and prevents wheel slippage and idling, effectively enhancing the braking and comfort performance of rail vehicles. This has been proven in actual use.

[0003] The wheel tread cleaning device mainly performs wheel cleaning by driving the grinder close to the wheel tread, and drives the grinder away from the wheel tread after completing the cleaning work to prevent affecting its operation. At present, pneumatic devices are usually used to achieve the movement and positioning of the driven grinder. The end of such a pneumatic device needs to be provided with an end cover assembly to provide gas inlet and outlet functions. At present, the tail air intake structure of the tread cleaning device is simple, and it adopts an end face sealing method. The degree of sealing depends entirely on the degree of compression between the parts, and the sealing effect is relatively poor. This will directly affect the contact pressure between the two when the pneumatic drive grinder is against the wheel tread, thereby affecting the cleaning effect; furthermore, this type of structure has a large gap between the spring guide rail and the air core, so when installing the spring guide rod, it is impossible to confirm whether it is installed in place, which may lead to wrong installation and other phenomena, directly causing the product to be unusable. Summary of the Invention

[0004] In view of this, the present application provides an end cover assembly, a pneumatic drive device, a wheel tread cleaning device and a rail vehicle, thereby effectively solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] According to one aspect of the present application, an end cover assembly is provided for sealing the air intake end of a cylinder of a wheel tread cleaning device, comprising: a cylinder cover having an inner end surface arranged toward the cylinder and an outer end surface arranged away from the cylinder; a first externally threaded cylinder extending and protruding from the inner end surface of the cylinder cover, which is mounted in cooperation with the cylinder; and a second externally threaded cylinder extending and protruding from the outer end surface of the cylinder cover; the cylinder cover having a through mounting hole, the mounting hole extending through the first externally threaded cylinder and the second externally threaded cylinder, It is used to arrange the air core and the elastic pull rod; and a pressure cover, which has an inner end face arranged toward the cylinder head and an outer end face arranged away from the cylinder head; a threaded hole cooperating with the second external threaded column is arranged on the inner end face of the pressure cover; and a throttling air hole is arranged between the threaded hole and the outer end face of the pressure cover; wherein a first mounting groove is also arranged between the inner end face of the pressure cover and the threaded hole; in the assembled state, the inner end face of the pressure cover abuts against the outer end face of the cylinder head, and is sealed via a sealing ring arranged in the first mounting groove.

[0006] Optionally, a first column extending and protruding is provided on the inner end face of the first externally threaded column facing the cylinder, and the diameter of the first column is smaller than that of the first externally threaded column; wherein the first externally threaded column cooperates with the supporting cylinder sleeve of the cylinder, and the first column cooperates with the cylinder barrel of the cylinder.

[0007] Optionally, a second mounting groove is provided between the first externally threaded cylinder and the inner end surface of the cylinder cover. In the assembled state, the supporting cylinder sleeve of the cylinder and the first externally threaded cylinder are sealed via a sealing ring arranged in the second mounting groove.

[0008] Optionally, a third mounting groove is provided on the side wall of the first column. In the assembled state, the cylinder barrel of the cylinder and the first column are sealed via a sealing ring arranged in the third mounting groove.

[0009] Optionally, a limiting step and a limiting groove for installing the air core are provided on the mounting hole in the second externally threaded cylinder.

[0010] According to another aspect of the present application, a pneumatic drive device is also provided, which includes: a supporting cylinder sleeve, a cylinder barrel, an air core, an elastic pull rod and the end cover assembly as described above; wherein, the end cover assembly is assembled to the end of the supporting cylinder sleeve through a first external threaded column on the cylinder cover; the air core is inserted into the mounting hole of the cylinder cover; and one end of the elastic pull rod is arranged in the mounting hole close to the air core.

[0011] Optionally, the air core is configured as a stepped air core, and a limiting step and a limiting groove are set on the mounting hole in the second externally threaded column, and also includes a limiting block plate with a through hole; wherein, the stepped end of the stepped air core is limited by the limiting step, and the other end of the stepped air core is limited by a limiting block plate clamped in the limiting groove.

[0012] Optionally, the through hole of the limit blocking piece and the through hole of the stepped air core are staggered.

[0013] According to another aspect of the present application, a wheel tread cleaning device is also provided, which includes: the end cover assembly as described above; or the pneumatic drive device as described above.

[0014] According to another aspect of the present application, a rail vehicle is provided, which includes: the end cover assembly as described above; or the pneumatic drive device as described above; or the wheel tread cleaning device as described above.

[0015] The principles, characteristics, features, and advantages of the various technical solutions of this application will be clearly understood from the following detailed description in conjunction with the accompanying drawings. For example, compared with the prior art, the technical solution of this application, through the use of a split structure and a sealing ring, not only provides a simple assembly process, improves assembly efficiency, and reduces assembly costs; but also provides good sealing performance, which stabilizes the output pressure of the device and is more conducive to the product performing its function. In addition, the arrangement position of the sealing ring does not conflict with the threaded connection between the split mechanism, taking into account the reliability of both installation and sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an embodiment of the assembled wheel tread cleaning device of the present application, in which the end cover assembly part is cut away.

[0017] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the end cover assembly in the wheel tread cleaning device of the present application. DETAILED DESCRIPTION

[0018] First of all, it should be noted that the following will illustrate the composition, working principle, characteristics and advantages of the end cover assembly, wheel tread cleaning device and rail vehicle according to the present invention in an illustrative manner, but it should be understood that all descriptions are given for illustration only and should not be understood as forming any limitation on the present invention.

[0019] In addition, for any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature shown or implied in the drawings, the present invention still allows for continued arbitrary combination or deletion between these technical features (or their equivalents) without any technical obstacles, thereby obtaining more other embodiments of the present invention that may not be directly mentioned in this document.

[0020] exist Figure 1 The general structure of an embodiment of the wheel tread cleaning device assembled according to the present application is only shown in a schematic manner, and Figure 2 The structural structure of the end cover assembly is shown in detail in the figure, and the technical solution of the present invention will be described in detail below in conjunction with the above drawings.

[0021] like Figure 1 and Figure 2 As shown, the end cover assembly has been assembled on the pneumatic drive device 200 of the wheel tread cleaning device 300, and has completed the sealing of the air intake end of the pneumatic drive device 200 (shown as a cylinder) of the wheel tread cleaning device 300. The end cover assembly 100 will be first explained in detail below. The end cover assembly 100 includes a cylinder head 110 and a pressure cover 120 in a split structure. The cylinder head has an inner end face 110a facing the cylinder and an outer end face 110b facing away from the cylinder. A first externally threaded cylinder 111 is provided on the inner end face 110a of the cylinder head 110 for mating with the cylinder. A second externally threaded cylinder 112 is provided on the outer end face of the cylinder head 110 for mating with the pressure cover 120. The cylinder head 110 also has a through-hole 113 extending through the first externally threaded cylinder 111 and the second externally threaded cylinder 112 for arranging the gas core 230 and the elastic pull rod 240. The gland 120 has an inner end face 120a facing the cylinder head 110 and an outer end face 120b facing away from the cylinder head 110. A threaded hole 121 is provided on the inner end face 120a of the gland 120 to mate with the second externally threaded cylinder 112, and a throttle air hole 122 is provided between the threaded hole 121 and the outer end face 120b of the gland 120 to regulate the airflow. During assembly, the cylinder head 110 can be first assembled onto the end of the cylinder, and then the gland 120 can be assembled onto the cylinder head 110. During this process, to achieve a seal between the two, a first mounting groove 123 is further provided between the inner end surface of the gland 120 and the threaded hole 121. When the inner end surface of the gland 120 is screwed against the outer end surface of the cylinder head 110, a seal is provided via the sealing ring 130 disposed in the first mounting groove 123.

[0022] Under this arrangement, the present application uses a split structure in combination with a sealing ring, which on the one hand provides a simple assembly process, improves assembly efficiency, and reduces assembly costs; on the other hand, it provides better sealing performance than end face sealing, so that the output pressure of the device is stable, which is more conducive to the product performing its function; in addition, the installation position of the sealing ring avoids the threaded part used to achieve the connection between the split mechanisms, so that the two will not conflict, and the reliability of installation and sealing is taken into account.

[0023] On the basis of the aforementioned embodiments, several modifications may be made to the various components of the end cover assembly or their connection position relationships in order to obtain other technical effects, which will be exemplified below.

[0024] For example, the inner end surface of the first externally threaded cylinder 111, which faces the cylinder, also includes a first cylinder 114 extending and protruding therefrom. The diameter of the first cylinder 114 is smaller than that of the first externally threaded cylinder 111. In this case, the first externally threaded cylinder 111 and the first cylinder 114 are assembled with different parts. For example, the first externally threaded cylinder 111 mates with the cylinder's support sleeve 210, while the first cylinder 114 mates with the cylinder's barrel 220. This arrangement is primarily designed to accommodate the structure of the pneumatic drive device. Considering the weight of the entire device and the required driving force, a relatively thick and high-strength support sleeve 210 is required to provide support and structure. At the same time, considering the smooth flow of gas within the cylinder, the barrel 220 should also have an inner wall with higher machining precision. Therefore, the design of the aforementioned drive device takes into account both cost and functionality, and the corresponding end cap assembly is also designed to accommodate the pneumatic drive device.

[0025] For another example, when the end cap assembly has the aforementioned segments to connect different parts, it is necessary to ensure the sealing performance of the joints between the segments. In this case, the end cap assembly can also be designed as follows. For example, a second mounting groove 115 can be provided between the first externally threaded cylinder 111 and the inner end surface of the cylinder head 110. In this case, in the assembled state, the cylinder support sleeve 210 and the first externally threaded cylinder 111 are sealed via the sealing ring 140 disposed in the second mounting groove 115. Alternatively, a third mounting groove 116 can be provided on the side wall of the first cylinder 114. In this case, in the assembled state, the cylinder barrel 220 and the first cylinder 114 are sealed via the sealing ring 150 disposed in the third mounting groove 116. This type of sealing ring not only provides better sealing performance than end-face sealing, but also avoids conflict between the mounting groove and the inherent threaded portion of the product, ensuring both installation and sealing reliability.

[0026] For example, in order to improve the reliability of the air core assembly, a limiting step 117 and a limiting groove 118 for installing the air core 230 can be set on the mounting hole 113 in the second external threaded cylinder 112, so as to achieve the limitation of the air core 230 at both ends of the axial direction and ensure its stable and reliable installation.

[0027] Continue to see Figure 1 and Figure 2 , which also shows an embodiment of a pneumatic drive device 200. The pneumatic drive device 200 includes: a supporting cylinder sleeve 210, a cylinder barrel 220, an air core 230, an elastic pull rod 240, and an end cover assembly 100 in any of the aforementioned embodiments or any combination thereof. At this time, the end cover assembly 100 can be first assembled to the end of the supporting cylinder sleeve 210 through the first externally threaded cylinder 111 on the cylinder head 110, and then the elastic pull rod 240 is adjusted at the other end of the cylinder to form an assembly relationship that allows relative movement with the cylinder head 110, and the air core 230 is inserted into the mounting hole 113 of the cylinder head 110 so that one end of the elastic pull rod 240 is close to the air core 230 arranged in place in the mounting hole 113. Finally, the pressure cover 120 is assembled on the cylinder head to complete the assembly and sealing. Among them, as a common pull rod structure in the cylinder, a radially protruding protrusion can be provided on the pull rod, and a corresponding slide groove can be provided on the cylinder head 110. By rotating the pull rod, the protrusion is embedded in the slide groove on the cylinder head 110, thereby realizing the assembly between the two, and the pull rod can also realize reciprocating motion along the slide groove under the action of elastic elements such as springs.

[0028] Under this arrangement, the present application provides a simple assembly process by using a split structure in conjunction with a sealing ring, which improves assembly efficiency and reduces assembly costs. On the other hand, it provides better sealing performance than end-face sealing, which stabilizes the output pressure of the device and is more conducive to the product performing its function. In addition, the installation position of the sealing ring avoids the threaded portion used to achieve the connection between the split mechanisms, so that the two will not conflict, and the reliability of installation and sealing are taken into account. In addition, since one end of the elastic pull rod 240 in the present application is arranged in the mounting hole 113 close to the air core 230, if its protrusion fails to fit into the slide groove on the cylinder head 110 during the assembly process, it will extend forward in the downward direction in the figure, thereby causing the air core to be unable to be installed in place. Therefore, this arrangement also allows the misassembly of the elastic pull rod to be identified and corrected, effectively eliminating the problem of misinstallation of the elastic guide rod.

[0029] On the basis of the aforementioned embodiments, several modifications may be made to the various components of the pneumatic drive device or their connection position relationships in order to obtain other technical effects, which will be exemplified below.

[0030] For example, in order to provide better positioning of the air core 230, it can be configured as a stepped air core 230. Correspondingly, a limiting step 117 and a limiting groove 118 are provided on the mounting hole 113 in the second externally threaded cylinder 112 of the cylinder head 110 of the end cover assembly 100. The driving device may also include a limiting block 250 having a through hole 250a to assist in positioning the air core 230. Specifically, when the stepped air core 230 is assembled into the cylinder head 110, its stepped end will first be limited by the limiting step 117 in the mounting hole 113. At this time, it can be known that the stepped end of the stepped air core 230 has been installed in place; then, the elastic limiting block 250 is pressed into the limiting groove 118 clamped in the mounting hole 113, thereby limiting the other end of the stepped air core 230. This arrangement provides a simple and effective way to fix the air core, thereby making it more stable and reliable when the air core and the elastic pull rod jointly regulate the intake and exhaust air flows in the cylinder.

[0031] For another example, in order to provide a further airflow adjustment effect, the through holes 250 ah on the limiting baffle 250 and the through holes 230 a on the stepped air core 230 may be staggered.

[0032] In addition, if Figure 1 and Figure 2 As shown, the present application also provides a wheel tread cleaning device 300, on which any embodiment or combination of the aforementioned end cover assembly 100 can be set according to application requirements, or any embodiment or combination of the aforementioned pneumatic drive device 200 can be set, thereby also having the technical effects brought by the aforementioned technical solutions.

[0033] In addition, although not shown in the figures, the present application also provides a rail vehicle, on which any embodiment or combination of the aforementioned end cover assembly 100, or any embodiment or combination of the aforementioned pneumatic drive device 200, or any embodiment or combination of the aforementioned wheel tread cleaning device 300 can be installed according to application needs, thereby also having the technical effects brought by the aforementioned technical solutions. It should be noted that the above-mentioned rail vehicles can include, but are not limited to, many types such as subway locomotives, high-speed rail locomotives, motor vehicles, urban light rail trains, etc.

[0034] It should be noted that the end cap assembly, pneumatic drive device, wheel tread cleaning device, and other components of the rail vehicle provided in accordance with this application may be designed, manufactured, and sold separately, or they may be assembled and sold as a whole. Whether as individual components before assembly or as a whole after assembly, they all fall within the scope of protection of this application.

[0035] The above examples are merely illustrative of the end cap assembly, pneumatic drive device, wheel tread cleaning device, and rail vehicle according to the present application. These examples are intended only to illustrate the principles and implementation methods of the present application and are not intended to limit the present application. Persons skilled in the art may make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions are intended to fall within the scope of the present application and are defined by the claims of the present application.

Claims

1. An end cap assembly for sealing the air inlet end of a cylinder of a wheel tread cleaning device, characterized in that: include: A cylinder head having an inner end surface facing the cylinder and an outer end surface facing away from the cylinder; a first externally threaded cylinder extending and protruding from the inner end surface of the cylinder head is provided, which cooperates with the cylinder for installation; and a second externally threaded cylinder extending and protruding from the outer end surface of the cylinder head; the cylinder head having a through mounting hole extending through the first externally threaded cylinder and the second externally threaded cylinder, and for arranging the gas core and the elastic pull rod; and a gland having an inner end surface facing the cylinder head and an outer end surface facing away from the cylinder head; a threaded hole cooperating with the second externally threaded cylinder is provided on the inner end surface of the gland; and a throttle air hole is provided between the threaded hole and the outer end surface of the gland; Wherein, a first mounting groove is further provided between the inner end surface of the gland and the threaded hole; in the assembled state, the gland is assembled to the cylinder head through the cooperation between the threaded hole and the second externally threaded cylinder, and the gland surrounds the second externally threaded cylinder, and the inner end surface of the gland abuts against the outer end surface of the cylinder head, and is sealed via the sealing ring arranged in the first mounting groove; and A first cylindrical body extending and protruding is provided on the inner end surface of the first externally threaded cylindrical body facing the cylinder. The diameter of the first cylindrical body is smaller than that of the first externally threaded cylindrical body. The first externally threaded cylindrical body cooperates with the supporting cylinder sleeve of the cylinder, and the first cylindrical body cooperates with the cylinder barrel of the cylinder. Wherein: a second mounting groove is provided between the first externally threaded cylinder and the inner end surface of the cylinder cover, and in the assembled state, the supporting cylinder sleeve of the cylinder and the first externally threaded cylinder are sealed via a sealing ring arranged in the second mounting groove; and / or a third mounting groove is provided on the side wall of the first cylinder, and in the assembled state, the cylinder barrel of the cylinder and the first cylinder are sealed via a sealing ring arranged in the third mounting groove.

2. The end cap assembly according to claim 1, wherein: A limiting step and a limiting groove for installing the air core are provided on the mounting hole in the second externally threaded cylinder.

3. A pneumatic drive device, characterized in that: include: A supporting cylinder liner, a cylinder barrel, an air core, an elastic pull rod and an end cover assembly as described in any one of claims 1 to 2; wherein the end cover assembly is assembled to the end of the supporting cylinder liner through a first externally threaded column on the cylinder cover; the air core is inserted into the mounting hole of the cylinder cover; and one end of the elastic pull rod is arranged in the mounting hole close to the air core.

4. The pneumatic drive device according to claim 3, characterized in that: The air core is configured as a stepped air core, and a limiting step and a limiting groove are set on the mounting hole in the second externally threaded column, and also includes a limiting block piece with a through hole; wherein, the stepped end of the stepped air core is limited by the limiting step, and the other end of the stepped air core is limited by a limiting block piece clamped in the limiting groove.

5. The pneumatic drive device according to claim 4, characterized in that: The through hole of the position-limiting baffle is staggered with the through hole of the stepped air core.

6. A wheel tread cleaning device, characterized in that: include: The end cover assembly according to any one of claims 1 to 2; or the pneumatic drive device according to any one of claims 3 to 5.

7. A rail vehicle, characterized in that: include: The end cap assembly according to any one of claims 1 to 2; or a pneumatic drive device as claimed in any one of claims 3 to 5; Or the wheel tread cleaning device as claimed in claim 6.

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