Dismounting method for coupling cover plate of motor train unit

Abstract

The invention discloses a motor train unit coupling cover plate dismounting method which comprises a dismounting device with a handle, a pull ring is movably installed in the handle through a connecting rod, a base is fixedly installed on the handle, at least three steel bars are fixedly connected to the base, clamping jaws are arranged at the tops of the steel bars, and the at least three steel bars are evenly distributed in the circumferential direction of the base. A sleeve is fixedly connected to the connecting rod, at least three steel bars are connected in the sleeve in a penetrating mode and are in a horn shape, and a spring is arranged between the sleeve and the base. The dismounting device is arranged, when the dismounting device is used for dismounting the cover plate, due to the fact that external force applied to the handle is distributed to the cover plate through the at least three steel bars, the cover plate is evenly stressed, and therefore the deformation condition of the cover plate can be effectively avoided; the combined structure of the at least three steel bars can be changed in diameter according to the size of the center hole of the cover plate so as to enter and exit the center hole; in addition, the disassembling method can achieve one-hand operation, and is convenient to use and efficient in operation.

Description

[0001] This application is a divisional application with the application date of "2022.08.19", application number "202210997789.7", and application name "A device for disassembling the coupling cover of an EMU and its use method". Technical Field

[0002] The invention belongs to the technical field of rail transportation, and in particular relates to a method for disassembling a coupling cover plate of an EMU. Background Art

[0003] The coupling is a key component of the transmission system of the railway train bogie, and the quality requirements for the manufacturing and repair of the coupling products are relatively high. The internal state of the coupling needs to be confirmed before assembly, so the coupling cover needs to be disassembled. According to the structural characteristics of the coupling, the cover and the coupling body are clamped by a sealing ring, and the center of the cover is opened, and it can be pulled out by applying force through the center hole. At present, if the cover is pulled out by human force alone, the strength of the fingers cannot overcome the clamping force of the cover; using general tools such as crowbars, screwdrivers, etc., although the cover can be pried open, the fulcrum position of the prying is prone to damage. In addition, the diameter of the center hole of the cover is small, and the diameter of the hole of different types of couplings is generally between 17mm and 21mm, so non-standard tooling tools are difficult to adapt.

[0004] At present, the method generally adopted in the industry is to use columnar tools or crutches for prying. At the contact point between the tool and the cover, the force transmission will cause a certain degree of damage to the cover. Usually, insulating tape or rubber tube is wrapped around the surface of the prying tool to reduce the hardness of the contact point to protect the coupling from contact damage. In addition, when prying in this way, if the prying force is too large, the cover will also deform. Since the center hole of the cover is small, the design requirements for the expansion and contraction mechanism that can achieve uniform force are high, and conventional expansion and contraction mechanisms cannot be effectively applied.

[0005] How to disassemble the coupling cover to achieve high-quality and efficient operations and ensure the quality of train body assembly is the fundamental thing people are pursuing now. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for disassembling a coupling cover plate of a motor vehicle group in an efficient and non-destructive manner.

[0007] A method for disassembling a coupling cover plate of a motor vehicle according to an embodiment of the present invention comprises a disassembly device, wherein the disassembly device comprises a handle, a pull ring is movably installed in the handle through a connecting rod, a base is fixedly installed on the handle, at least three steel bars are fixedly connected to the base and claws are arranged on the top of the steel bars, at least three of the steel bars are evenly distributed along the circumference of the base, a sleeve is fixedly connected to the top of the connecting rod, at least three of the steel bars are respectively inserted into the sleeve and are trumpet-shaped, a spring is arranged between the sleeve and the base, the sleeve is configured so that when the spring is in a compressed position, the steel bars are opened to each other and when the spring is in a reset position, the steel bars are contracted to each other; the disassembly method comprises the following steps: passing all the steel bars through the center hole of the cover plate; pulling the pull ring so that the steel bars are free from the constraint of the sleeve and open to a hooking state; adjusting the claws to a state of being close to the bottom of the cover plate; applying external force to the handle to disassemble the cover plate.

[0008] The present invention has at least the following beneficial effects: by providing a disassembly device, when the disassembly device disassembles the cover plate, the external force applied to the handle is distributed to the cover plate by at least three steel bars, and the cover plate is evenly stressed, thereby effectively preventing the cover plate from being deformed; and the combined structure of at least three steel bars can change the diameter according to the size of the center hole of the cover plate so as to achieve entry and exit from the center hole; and the disassembly method of this embodiment can be operated with one hand, which is easy to use and efficient to operate.

[0009] According to some embodiments of the present invention, after the step of applying external force to the handle to remove the cover plate, the step further includes: loosening the pull ring to allow the steel bar sleeve to shrink and detach from the cover plate.

[0010] According to some embodiments of the present invention, a pin is passed through the sleeve, and the spring is installed between the pin and the base.

[0011] According to some embodiments of the present invention, two pins are provided, and the two pins are arranged in a cross shape.

[0012] According to some embodiments of the present invention, the base includes a fixing seat located at a lower portion for fixing the steel bars and a supporting seat located at an upper portion, and the supporting seat is provided with a plurality of grooves for positioning at least three of the steel bars respectively.

[0013] According to some embodiments of the present invention, the steel bar is a spring steel bar.

[0014] According to some embodiments of the present invention, there are two connecting rods, and the two connecting rods are respectively fixed on two sides of the sleeve.

[0015] According to some embodiments of the present invention, the connecting rod is movably connected to the handle.

[0016] According to some embodiments of the present invention, the connecting rod is fixedly connected to the sleeve by bolts.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural state diagram of the present invention; Figure 2 It is a schematic diagram of the use state of the present invention; Figure 3 It is a schematic diagram of the installation of the base of the present invention; Figure 4 It is a schematic diagram of the internal structure of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the 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 therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1A coupling cover disassembly device for a motor vehicle comprises a handle 1, a pull ring 2 is movably installed in the handle 1 through a connecting rod 21, the connecting rod 21 is movably connected to the handle 1, a base 3 is fixedly installed on the handle 1, two or more steel bars 4 are fixedly connected to the base 3, a claw 41 is arranged on the top of the steel bar 4, there are two connecting rods 21, which are distributed and fixed on both sides of the sleeve 5, and the connecting rod 21 is fixedly connected to the sleeve 5 by bolts. The steel bar 4 is inserted in the sleeve 5 and arranged in a trumpet shape, and a spring 6 is arranged between the sleeve 5 and the base 3.

[0024] Reference Figure 4 In order to remove the constraint on the steel bar 4 when the product is not in use and to increase the service life of the steel bar 4, a pin 51 is inserted into the sleeve 5, and the spring 6 is installed between the pin 51 and the base 3. When the product is not in use, the pin 51 can be removed from the sleeve 5. In addition, there are two pins 51, which are arranged in a cross shape, so as to provide uniform support for the spring 6.

[0025] The steel bars 4 used in this product are spring steel bars, and there are four of them, which are evenly distributed along the base 3. Of course, they can also be made into 3 or 5 bars as needed.

[0026] Reference Figure 3 The base 3 of this product is an I-shaped structure, with the lower part serving as a steel bar fixing seat 31 and the upper part serving as a support seat 32. The support seat 32 is provided with a groove 321 for positioning the steel bar 4. This design enables the steel bar 4 to be inserted into the sleeve 5 in a trumpet shape, thereby enabling the steel bar 4 to have a variable diameter and enter and exit the center hole of the cover plate 7.

[0027] Reference Figure 1 , Figure 2 , a method for using a motor vehicle coupling cover plate disassembly device, the method comprising the following steps: 1) First, pass the steel bar 4 through the center hole of the cover plate 7; 2) Pull the pull ring 2, the pull ring 2 drives the sleeve 5 to compress the spring 6, and at the same time the steel bar 4 is freed from the constraint of the sleeve 5, forming an open hook state, and the claw 41 at the top of the steel bar 4 is close to the bottom of the cover plate 7. At this time, applying force to the handle 1 can complete the removal of the cover plate 7; 3) Release the pull ring 2 , and the sleeve 5 returns to its initial state under the action of the spring 6 , and the steel bar 4 contracts under the constraint of the sleeve 5 , so that the cover plate 7 is separated from the steel bar 4 .

[0028] When the device is used to dismantle the cover plate 7, the steel bar 5 applies force evenly to the cover plate 7, thereby effectively preventing the cover plate from being deformed. In addition, the device acts on the cover plate 7, and can change the diameter of the cover plate 7 according to the size of the center hole of the cover plate to achieve entry and exit from the center hole of the cover plate 7. Moreover, the overall structure of the device is simple, and all control requirements can be achieved by single-handed operation, thereby accurately and efficiently completing the disassembly of the coupling cover plate in the coupling production process.

[0029] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A method for disassembling a coupling cover plate of an EMU, characterized in that: The disassembly device comprises a handle, a pull ring is movably installed in the handle through a connecting rod, a base is fixedly installed on the handle, at least three steel bars are fixedly connected to the base and claws are arranged on the top of the steel bars, at least three steel bars are evenly distributed along the circumference of the base, a sleeve is fixedly connected to the top of the connecting rod, at least three steel bars are respectively inserted into the sleeve and are trumpet-shaped, a spring is arranged between the sleeve and the base, and the sleeve is configured so that when the spring is in a compressed position, the steel bars are mutually expanded and when the spring is in a reset position, the steel bars are mutually contracted; The disassembly method comprises the following steps: Pass all the steel bars through the center hole of the cover plate; Pull the pull ring to make the steel bar free from the constraint of the sleeve and open it into a hook-and-pull state; Adjust the claws to fit snugly against the bottom of the cover; Apply force to the handle to remove the cover.

2. The method for disassembling a coupling cover plate of a motor vehicle unit according to claim 1, characterized in that: After the step of applying external force to the handle to remove the cover plate, the method further comprises: Loosen the pull ring to allow the steel bar sleeve to shrink and detach from the cover.

3. The method for disassembling a coupling cover plate of a motor vehicle unit according to claim 1, characterized in that: A pin is passed through the sleeve, and the spring is installed between the pin and the base.

4. A method for disassembling a coupling cover plate of a motor vehicle unit according to claim 3, characterized in that: There are two pins, and the two pins are arranged in a cross shape.

5. The method for disassembling a coupling cover plate of a motor vehicle unit according to claim 1, characterized in that: The base includes a fixing seat located at the lower part for fixing the steel bars and a supporting seat located at the upper part, and the supporting seat is provided with a plurality of grooves for positioning at least three of the steel bars respectively.

6. The method for disassembling a coupling cover plate of a motor vehicle unit according to claim 1, characterized in that: The steel bar is a spring steel bar.

7. The method for disassembling a coupling cover plate of a motor vehicle unit according to claim 1, characterized in that: There are two connecting rods, and the two connecting rods are respectively fixed on two sides of the sleeve.

8. A method for disassembling a coupling cover plate of a motor vehicle unit according to claim 7, characterized in that: The connecting rod is movably connected to the handle.

9. A method for disassembling a coupling cover plate of a motor vehicle unit according to claim 7, characterized in that: The connecting rod is fixedly connected to the sleeve by bolts.

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