Multifunctional dismounting wrench for train coupler MR connector of motor train unit

Abstract

The utility model discloses a multifunctional disassembling and assembling wrench for a train coupler MR connector of a motor train unit. The multifunctional disassembling and assembling wrench comprises an outer shell, a sliding sleeve and a wrench head. The outer shell is provided with a first outer cylinder and a second outer cylinder with the diameter smaller than that of the first outer cylinder, and the sliding sleeve is arranged on the second outer cylinder in a sleeving mode and slides on the second outer cylinder in the axial direction. The front end face of the sliding sleeve is provided with a pair of square teeth, and the square teeth are symmetrically arranged on the sliding sleeve at equal intervals. The wrench head is detachably mounted at the front end of the second outer cylinder; a handle is further arranged at the position, close to the rear end, of the first outer cylinder, and the handle is perpendicular to the axial direction of the first outer cylinder and extends towards the two sides of the first outer cylinder. When the MR connector needs to be disassembled and assembled, the sliding sleeve slides towards the front end of the second outer cylinder; when the bolt needs to be dismantled, the sliding sleeve slides towards the rear end of the second outer cylinder. The motor train unit maintenance tool has multiple disassembly and assembly modes, can be suitable for different scenes in the motor train unit maintenance process, is small in size and convenient to carry, and saves the time and cost of motor train unit maintenance.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of EMU maintenance technology, and more specifically, relate to a multi-functional disassembly and assembly wrench for EMU coupler MR connectors. Background Technology

[0002] In modern high-speed train operation systems, MR connectors are key components for multiple-unit operation, and their reliability and stability directly affect the safe and efficient operation of the train. During the long-term high-speed operation of the train, MR connectors are inevitably affected by various complex operating conditions, such as vibration, impact, high temperature, and corrosion from various contaminants, making the inspection and maintenance of MR connectors particularly important.

[0003] Currently, the maintenance of MR connectors on high-speed trains mainly involves checking the connector surface for damage, cracks, burning, corrosion, and other problems. Once damaged components, such as contacts and seals, are found, they must be replaced according to the prescribed procedures. However, in actual maintenance work, many difficulties exist. Due to the long-term high-speed operation of high-speed trains, a large amount of stubborn dirt accumulates on the surface of the MR connector, and it needs to be disassembled by rotation, with two positioning grooves on the surface. However, there are currently no standard tools specifically for MR connectors. When disassembling, operators are often forced to use pointed pliers or small hammers to pry the grooves to achieve rotation, which is not only extremely inefficient but also makes it difficult to ensure a quick and safe disassembly.

[0004] Furthermore, during maintenance, there are numerous points requiring the disassembly and assembly of bolts of different models. Existing tools cannot meet the needs for universal disassembly and assembly of products within the same series, necessitating the transport of a large number of different tools to the site. This not only increases maintenance costs but also extends maintenance time, impacting the normal operation and turnover of high-speed trains. Therefore, a multi-functional disassembly and assembly wrench for the MR connectors of high-speed train couplers is needed for the rapid and safe disassembly and assembly of MR connectors, improving high-speed train maintenance efficiency, reducing maintenance costs, and ensuring the safe and stable operation of high-speed trains. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a multi-functional disassembly and assembly wrench for the MR connector of a high-speed train coupler. When disassembling or assembling the MR connector, the sliding sleeve is slid towards the front end of the second outer cylinder, allowing the square teeth to extend from the end face of the second outer cylinder. The square teeth are then engaged in the notch on the end face of the MR connector for rotation. When removing bolts at other maintenance points, the sliding sleeve is slid towards the rear end of the second outer cylinder, exposing the wrench head, which is then used to disassemble or assemble the bolts. This multi-functional disassembly and assembly wrench offers multiple disassembly and assembly modes, making it suitable for various scenarios during high-speed train maintenance. Its small size and portability also save time and costs associated with high-speed train maintenance.

[0006] To achieve the above objectives, this utility model provides a multi-functional disassembly and assembly wrench for the MR connector of a train coupler, comprising a housing, a sliding sleeve, and a wrench head.

[0007] The outer shell is provided with a first outer cylinder and a second outer cylinder with a diameter smaller than the first outer cylinder. The sliding sleeve is fitted on the second outer cylinder and slides axially on the second outer cylinder.

[0008] The front end face of the sliding sleeve is provided with a pair of square teeth, which are symmetrically and equidistantly arranged on the sliding sleeve.

[0009] The wrench head is detachably mounted on the front end of the second outer cylinder;

[0010] The first outer cylinder is also provided with a handle near the rear end. The handle is arranged perpendicular to the axis of the first outer cylinder and extends to both sides of the first outer cylinder.

[0011] Furthermore, the second outer cylinder is provided with at least two sliding grooves, which are Z-shaped and arranged along the outer surface of the second outer cylinder. The upper horizontal groove of the Z-shaped sliding groove has a downward baffle groove at its end and the lower horizontal groove has an upward baffle groove at its end.

[0012] Furthermore, the sliding sleeve also includes a sleeve and a second limiting plate disposed inside the sleeve.

[0013] Furthermore, the sliding sleeve is fitted onto the second outer cylinder, the number and position of the second limiting plates are the same as the number of sliding grooves, and their width is the same as the width of the sliding grooves. The second limiting plates are disposed in the sliding grooves and move along the sliding grooves.

[0014] Furthermore, the inner diameter of the sleeve is the same as the outer diameter of the second outer cylinder, and the two are in clearance fit.

[0015] The thickness of the second limiting plate is less than the depth of the groove.

[0016] Furthermore, the interior of the second outer cylinder is provided with a cylindrical hollow as a wrench mounting cavity, and the inner wall of the wrench mounting cavity is provided with at least two first limiting plates, the first limiting plates being protruding plates that protrude toward the center of the wrench mounting cavity.

[0017] Furthermore, the outer diameter of the wrench head is the same as the diameter of the wrench mounting cavity, and its outer surface is also provided with grooves that are the same in number and shape as the first limiting plate;

[0018] The wrench head has hexagonal grooves at both ends, and the dimensions of the hexagonal grooves at both ends are different.

[0019] Furthermore, the wrench head is provided in multiple parts, and each wrench head has hexagonal grooves at both ends, and the size of the hexagonal grooves of each wrench head is different.

[0020] The first outer cylinder has a cylindrical hollow inside as a storage cavity. The length of the storage cavity is greater than the length of the wrench mounting cavity, and a partition plate is provided between the two to separate them.

[0021] The diameter of the storage cavity is larger than the diameter of the wrench head. One wrench head is installed in the wrench mounting cavity, and the remaining multiple wrench heads are stored in the storage cavity.

[0022] Furthermore, the storage cavity has a rear cover at its opening, and the rear cover is detachably installed at the rear end of the second outer cylinder.

[0023] Furthermore, the handle is provided with tool heads of different specifications at both ends;

[0024] The tool head includes one or more combinations of hexagonal head, Phillips head screwdriver, or flathead screwdriver.

[0025] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0026] 1. This utility model's multi-functional disassembly and assembly wrench, when needing to disassemble or assemble an MR connector, allows the sliding sleeve to slide towards the front end of the second outer cylinder, causing the square teeth to extend from the end face of the second outer cylinder. The square teeth are then engaged in the notch on the end face of the MR connector for rotation. When removing bolts at other maintenance points, the sliding sleeve is slid towards the rear end of the second outer cylinder, exposing the wrench head, which is then used to disassemble or assemble the bolts. This multi-functional disassembly and assembly wrench offers multiple disassembly and assembly modes, making it suitable for various scenarios during high-speed train maintenance. Its small size makes it easy to carry, saving time and costs associated with high-speed train maintenance.

[0027] 2. The multi-functional disassembly and assembly wrench of this utility model is equipped with multiple detachable wrench heads, and each wrench head has hexagonal grooves of different specifications at both ends to disassemble and assemble bolts of different specifications, thereby enhancing the wrench's versatility.

[0028] 3. The multi-functional disassembly and assembly wrench of this utility model has tool heads of different specifications, including hexagonal heads, Phillips screwdrivers, or flathead screwdrivers, at both ends of the handle. By using the handle as a third disassembly and assembly tool, the usage scenarios of this multi-functional disassembly and assembly wrench are increased.

[0029] 4. The multi-functional disassembly and assembly wrench of this utility model has a hollow storage cavity in the first outer cylinder to store excess wrench heads. This reduces the weight of the outer shell and frees up space for storing wrench heads, increasing the convenience of the wrench and enhancing its versatility. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the sliding sleeve extension structure of a multi-functional disassembly and assembly wrench for a coupler MR connector of a high-speed train according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the sliding sleeve retraction structure of a multi-functional disassembly and assembly wrench for a coupler MR connector of a high-speed train according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the outer shell structure of a multi-functional disassembly and assembly wrench for a coupler MR connector of a high-speed train according to an embodiment of the present invention;

[0033] Figure 4 This is a cross-sectional view of the outer shell structure of a multi-functional disassembly and assembly wrench for a high-speed train coupler MR connector according to an embodiment of the present invention;

[0034] Figure 5 This is a cross-sectional view of the outer shell and wrench head structure of a multi-functional disassembly and assembly wrench for a coupler MR connector of a high-speed train, according to an embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the sliding sleeve structure of a multi-functional disassembly and assembly wrench for a coupler MR connector of a high-speed train, according to an embodiment of the present invention.

[0036] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-outer shell, 11-first outer cylinder, 12-second outer cylinder, 13-slide groove, 14-wrench mounting cavity, 15-first limiting plate, 16-storage cavity, 17-rear cover, 18-handle, 19-hexagonal head, 2-sliding sleeve, 21-sleeve, 22-second limiting plate, 23-square teeth, 3-wrench head. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1-6 As shown, the MR connector of the EMU coupler does not have bolts for easy disassembly and assembly. Instead, it has two symmetrical notches on the end face. During disassembly and assembly, since there are no special disassembly tools, flathead screwdrivers or scissors are usually inserted into the notches and the MR connector is rotated by tapping, thereby removing the MR connector. This disassembly method is too complicated, and the tapping will inevitably damage the MR connector. Long-term operation in this way may lead to failure.

[0039] This utility model provides a multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers, including a housing 1, a sliding sleeve 2, and a wrench head 3. The housing 1 has a first outer cylinder 11 and a second outer cylinder 12 with a diameter smaller than the first outer cylinder 11. The sliding sleeve 2 is fitted onto the second outer cylinder 12 and slides axially on it. The wrench head 3 is detachably mounted on the front end of the second outer cylinder 12. The front end face of the sliding sleeve 2 has a pair of square teeth 23, which are symmetrically and equidistantly arranged on the sliding sleeve 2. When disassembling or assembling the MR connector, the sliding sleeve 2 is slid towards the front end of the second outer cylinder 12, causing the square teeth 23 to extend from the end face of the second outer cylinder 12. The square teeth 23 are then engaged in the notches on the end face of the MR connector, allowing it to be rotated. When removing bolts at other maintenance points, the sliding sleeve 2 is slid towards the rear end of the second outer cylinder 12, exposing the wrench head 3, which is then used to disassemble or assemble the bolts. This multi-functional disassembly and assembly wrench has multiple disassembly and assembly modes, making it suitable for different scenarios during EMU maintenance. Its small size makes it easy to carry, saving time and costs in EMU maintenance.

[0040] The second outer cylinder 12 is provided with at least two sliding grooves 13. The sliding grooves 13 are Z-shaped and are arranged along the outer surface of the second outer cylinder 12. The upper horizontal groove of the Z-shaped sliding groove 13 is provided with a downward blocking groove at the end and the lower horizontal groove is provided with an upward blocking groove at the end.

[0041] The sliding sleeve 2 also includes a sleeve 21 and a second limiting plate 22 disposed inside the sleeve 21. The sliding sleeve 2 is fitted onto the second outer cylinder 12. The number and position of the second limiting plates 22 are the same as the number of sliding grooves 13, and their width is the same as the width of the sliding grooves 13. The second limiting plates 22 are disposed in the sliding grooves 13 and move along the sliding grooves 13. When the second limiting plate 22 rotates into the stop groove of the upper transverse groove, the wrench head 3 at the front end of the second outer cylinder 12 is exposed, facilitating the installation and removal of bolts using the wrench head 3. When the second limiting plate 22 rotates into the stop groove of the lower transverse groove, the front end of the sleeve 21 extends beyond the end face of the second outer cylinder 12, exposing the square teeth 23, facilitating the installation and removal of the MR connector.

[0042] Preferably, the inner diameter of the sleeve 21 is the same as the outer diameter of the second outer cylinder 12, and the two are in a clearance fit to ensure that the sleeve 21 rotates on the second outer cylinder 12 and moves along its axial direction, thereby realizing the extension and retraction of the sleeve 21 on the second outer cylinder 12. The thickness of the second limiting plate 22 is less than the depth of the slide groove 13, so that it can slide smoothly in the slide groove 13. And by limiting the second limiting plate 22 in the retaining grooves of the upper and lower transverse grooves of the slide groove 13, the sleeve 21 is temporarily limited in the axial direction.

[0043] The second outer cylinder 12 has a cylindrical hollow cavity inside as a wrench mounting cavity 14. At least two first limiting plates 15 are provided on the inner wall of the wrench mounting cavity 14. Each first limiting plate 15 is a protruding plate extending towards the center of the wrench mounting cavity 14. The outer diameter of the wrench head 3 is the same as the diameter of the wrench mounting cavity 14, and its outer surface is also provided with grooves of the same number and shape as the first limiting plates 15. Both ends of the wrench head 3 have hexagonal grooves for disassembling and assembling bolts, and the dimensions of the hexagonal grooves at both ends are different to accommodate bolts of different specifications.

[0044] As a further preferred embodiment, the wrench head 3 is provided in multiple portions, each wrench head 3 having hexagonal grooves at both ends. The dimensions of the hexagonal grooves in each wrench head 3 are different to accommodate bolts of different sizes. The interior of the first outer cylinder 11 has a cylindrical hollow section serving as a storage cavity 16. The length of the storage cavity 16 is greater than the length of the wrench mounting cavity 14, and a partition plate separates the two. One wrench head 3 is installed in the wrench mounting cavity 14, and the remaining multiple wrench heads 3 are stored in the storage cavity 16. The diameter of the storage cavity 16 is larger than the diameter of the wrench head 3, facilitating the movement of the wrench heads 3 within the storage cavity 16. A rear cover 17 is provided at the opening of the storage cavity 16. The rear cover 17 is detachably installed at the rear end of the second outer cylinder 12, and the two are preferably connected by threads. This is used to store the wrench heads 3 in the storage cavity 16, facilitating subsequent replacement of the wrench heads 3 according to the specifications of the bolts to be disassembled or installed.

[0045] Preferably, a storage cavity 16 is provided in the first outer cylinder 11, which reduces the weight of the outer shell 1 and frees up space to provide storage space for the wrench head 3, increasing the convenience of the wrench and enhancing its versatility.

[0046] The first outer cylinder 11 is also provided with a handle 18 near its rear end. The handle 18 is arranged perpendicular to the axial direction of the first outer cylinder 11 and extends to both sides of the first outer cylinder 11. When using the square teeth 23 to assemble or disassemble the MR connector or the wrench head 3 to assemble or disassemble the bolts, it provides the operator with a point of leverage and increases the torque, making it easier to complete the assembly or disassembly. The two ends of the handle 18 are respectively provided with hexagonal heads 19 of different specifications for use as internal hexagonal wrenches.

[0047] As a further preferred embodiment, in addition to the hexagonal heads 19, the two ends of the handle 18 can also be provided with a Phillips screwdriver, a flathead screwdriver, or a combination thereof.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers, characterized in that, It includes an outer casing (1), a sliding sleeve (2), and a wrench head (3); The outer shell (1) is provided with a first outer cylinder (11) and a second outer cylinder (12) with a diameter smaller than the first outer cylinder (11). The sliding sleeve (2) is fitted on the second outer cylinder (12) and slides axially on the second outer cylinder (12). The front end face of the sliding sleeve (2) is provided with a pair of square teeth (23), which are symmetrically and equidistantly arranged on the sliding sleeve (2); The wrench head (3) is detachably mounted on the front end of the second outer cylinder (12); The first outer cylinder (11) is also provided with a handle (18) near the rear end. The handle (18) is arranged perpendicular to the axis of the first outer cylinder (11) and extends to both sides of the first outer cylinder (11).

2. A multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers according to claim 1, characterized in that, The second outer cylinder (12) is provided with at least two sliding grooves (13). The sliding grooves (13) are Z-shaped and are provided along the outer surface of the second outer cylinder (12). The upper horizontal groove of the Z-shaped sliding groove (13) is provided with a downward blocking groove at the end and the lower horizontal groove is provided with an upward blocking groove at the end.

3. A multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers according to claim 2, characterized in that, The sliding sleeve (2) also includes a sleeve (21) and a second limiting plate (22) disposed inside the sleeve (21).

4. A multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers according to claim 3, characterized in that, The sliding sleeve (2) is fitted onto the second outer cylinder (12). The number and position of the second limiting plate (22) are the same as the number of the sliding groove (13), and its width is the same as the width of the sliding groove (13). The second limiting plate (22) is located in the sliding groove (13) and moves along the sliding groove (13).

5. A multi-functional disassembly and assembly wrench for MR connectors of EMU couplers according to claim 4, characterized in that, The inner diameter of the sleeve (21) is the same as the outer diameter of the second outer cylinder (12), and the two are in clearance fit. The thickness of the second limiting plate (22) is less than the depth of the groove (13).

6. A multi-functional disassembly and assembly wrench for MR connectors of EMU couplers according to any one of claims 1-5, characterized in that, The interior of the second outer cylinder (12) is provided with a cylindrical hollow as a wrench mounting cavity (14). The inner wall of the wrench mounting cavity (14) is provided with at least two first limiting plates (15), and the first limiting plate (15) is a protruding plate that protrudes toward the center of the wrench mounting cavity (14).

7. A multi-functional disassembly and assembly wrench for MR connectors of EMU couplers according to claim 6, characterized in that, The outer diameter of the wrench head (3) is the same as the diameter of the wrench mounting cavity (14), and its outer surface is also provided with grooves that are the same in number and shape as the first limiting plate (15). Both ends of the wrench head (3) have hexagonal grooves, and the dimensions of the hexagonal grooves at both ends are different.

8. A multi-functional disassembly and assembly wrench for MR connectors of EMU train couplers according to claim 7, characterized in that, The wrench head (3) is provided in multiple ways, and each wrench head (3) has a hexagonal groove at both ends. The size of the hexagonal groove of each wrench head (3) is different. The first outer cylinder (11) has a cylindrical hollow inside as a storage cavity (16). The length of the storage cavity (16) is greater than the length of the wrench mounting cavity (14), and a partition plate is provided between the two to separate them. The diameter of the storage cavity (16) is larger than the diameter of the wrench head (3). One wrench head (3) is installed in the wrench mounting cavity (14), and the remaining multiple wrench heads (3) are stored in the storage cavity (16).

9. A multi-functional disassembly and assembly wrench for MR connectors of EMU couplers according to claim 8, characterized in that, The storage cavity (16) is provided with a rear cover (17) at the cavity opening, and the rear cover (17) is detachably installed at the rear end of the second outer cylinder (12).

10. A multi-functional disassembly and assembly wrench for MR connectors of EMU couplers according to any one of claims 1-5, characterized in that, The handle (18) is provided with tool heads of different specifications at both ends; The tool head includes one or more combinations of a hexagonal head (19), a Phillips screwdriver, or a flathead screwdriver.

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