Multifunctional wrench for fastening bolt of VCB electromagnetic valve of motor train unit

Abstract

The utility model discloses a multifunctional wrench for fastening bolts of a VCB electromagnetic valve of a motor train unit. The multifunctional wrench comprises a handheld sleeve, a middle sleeve and an inner pipe. The middle sleeve slides in the sleeve, and the middle sleeve and the sleeve form a telescopic structure; the inner pipe slides in the middle sleeve, and the inner pipe and the middle sleeve form another telescopic structure; a socket wrench and an internal hexagonal wrench are arranged at the end of one of the middle sleeve and the inner pipe, and an open wrench is arranged at the end of the other one of the middle sleeve and the inner pipe. The middle sleeve or the inner pipe extends out to enable the socket wrench or the internal hexagonal wrench or the open end wrench at the end of the middle sleeve or the inner pipe to disassemble and assemble corresponding bolts, when the middle sleeve or the inner pipe is not used, the wrenches at the two ends are both retracted, bolts of different types and models can be rapidly dealt with, meanwhile, storage and carrying are convenient, convenience is provided for maintenance personnel, the maintenance efficiency of the motor train unit is improved, and the maintenance cost is reduced. And the driving safety of the motor train unit is ensured.

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 wrench for tightening bolts of VCB solenoid valves in EMUs. Background Technology

[0002] Vacuum circuit breakers are suitable for high-speed trains with a 25kV overhead contact line. They are the main switch for disconnecting the high-voltage circuit of the train. When a fault occurs in the train, they can safely, quickly, and effectively cut off the main power supply. They are the main protective device for the train, possessing both control and protection functions. The VCB solenoid valve is a core component of the vacuum circuit breaker. Based on the analysis of our section's advanced maintenance and repair work in recent years, the frequency of VCB solenoid valve failures is not low, mainly due to the following two reasons: ① After a certain number of operations, the VCB solenoid valve's sensitivity decreases, making it unable to operate under the voltage and pressure standards required for the vacuum circuit breaker's operating test. ② The butterfly seal gasket of the VCB solenoid valve is not installed tightly, leading to air leakage during leak detection tests.

[0003] All of the above situations require disassembly and troubleshooting of the VCB solenoid valve. VCB solenoid valves have different types and models of bolts, and currently there are no effective tools for troubleshooting. Disassembly and assembly are too cumbersome, requiring multiple tools to be brought to the site, impacting maintenance efficiency. When a fault occurs, specific manufacturer-specified tools must be used to tighten the VCB solenoid valve bolts, wasting manpower and resources and potentially delaying the maintenance of the high-speed train.

[0004] Therefore, a multi-functional wrench is needed for tightening bolts on VCB solenoid valves of high-speed trains, so that maintenance personnel can handle various types and specifications of bolts on VCB solenoid valves with only one tool, speed up the fault inspection and handling of VCB solenoid valves, ensure the maintenance efficiency of high-speed trains, and provide a guarantee for the safe 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 wrench for tightening bolts of VCB solenoid valves in high-speed trains. By extending the middle sleeve or inner tube, the socket wrench, hex wrench, or open-end wrench at its end can be used to install or remove the corresponding bolts. When not in use, both ends of the wrench can be retracted, allowing for quick handling of different types and models of bolts. It is also easy to store and carry, providing convenience for maintenance personnel, improving the efficiency of high-speed train maintenance, and ensuring the safe operation of high-speed trains.

[0006] To achieve the above objectives, this utility model provides a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, comprising: a handheld sleeve, an intermediate sleeve, and an inner tube.

[0007] The intermediate sleeve slides inside the sleeve, and the two together form a telescopic structure; the inner tube slides inside the intermediate sleeve, and the two together form another telescopic structure.

[0008] One end of the intermediate sleeve or inner tube is provided with a socket wrench and an internal hex wrench, and the other end of the intermediate sleeve or inner tube is provided with an open wrench.

[0009] Furthermore, the handheld sleeve is a hollow circular tube with at least one pair of first limiting grooves axially formed on its inner surface. Only one end of the first limiting groove passes through the handheld sleeve, while the other end remains at a distance from the end face.

[0010] Furthermore, a first rotating groove is provided circumferentially at one end of the first limiting groove, the first rotating groove being deeper than the first limiting groove, and the bottoms of the two grooves being connected by a first slope.

[0011] The end of the first limiting groove that is not penetrated is provided with a second rotating groove along the circumference. The second rotating groove is deeper than the first limiting groove, and the bottoms of the two grooves are connected by a second slope.

[0012] Furthermore, the intermediate sleeve is a hollow circular tube, with a first limiting block at one end of its outer surface corresponding to the first limiting groove, and a first spring block at the other end corresponding to the first limiting groove.

[0013] The end of the intermediate sleeve with the first elastic block is always located inside the handheld sleeve, and the end with the first limiting block serves as the telescopic end.

[0014] Furthermore, the first limiting block is fixed to the outer surface of the intermediate sleeve, while the first spring block is embedded in the outer surface of the intermediate sleeve, specifically:

[0015] The intermediate sleeve has an opening for mounting holes on one end surface of the first spring block. The first spring block is located in the mounting hole, and the two are connected by a spring. A limiting structure is provided at the opening of the mounting hole and the first spring block.

[0016] Furthermore, at least one pair of second limiting grooves are formed on the inner surface of the intermediate sleeve along the axial direction. Only one end of the second limiting groove penetrates the intermediate sleeve, while the other end remains at a distance from the end face.

[0017] Furthermore, a third rotating groove is provided circumferentially at one end of the second limiting groove. The third rotating groove is deeper than the second limiting groove, and the bottoms of the two grooves are connected by a third slope.

[0018] The end of the second limiting groove that is not penetrated is provided with a fourth rotating groove along the circumference. The fourth rotating groove is deeper than the second limiting groove, and the bottoms of the two grooves are connected by a fourth slope.

[0019] Furthermore, a second limiting block is provided at one end of the outer surface of the inner tube corresponding to the position of the second limiting groove, and a second spring block is provided at the other end corresponding to the position of the second limiting groove;

[0020] The end of the inner tube with the second spring block is always located inside the middle sleeve, and the end with the second limiting block serves as the telescopic end.

[0021] Furthermore, the second limiting block is fixed to the outer surface of the inner tube, while the second spring block is embedded in the outer surface of the inner tube, specifically:

[0022] The inner tube has an opening for mounting holes on one end surface where the second spring block is located. The second spring block is located in the mounting hole and the two are connected by a spring. A limiting structure is provided at the opening of the mounting hole and the second spring block.

[0023] Furthermore, the socket wrench has an elastic cavity at its rear end and multiple sleeves at its front end. These multiple sleeves are nested together in multiple layers. The outermost sleeve is fixedly connected to the wall of the elastic cavity, and the inner sleeves are all connected to the elastic cavity by springs.

[0024] The rear end of the hex wrench is also provided with an elastic cavity, and the front end is provided with multiple hexagonal posts. These multiple hexagonal posts are nested together in multiple layers. The innermost hexagonal post is fixedly connected to the bottom of the elastic cavity, and the outermost hexagonal posts are all connected to the elastic cavity by springs.

[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. The multi-functional wrench of this utility model extends through the middle sleeve or inner tube, allowing the socket wrench, internal hex wrench, or open-end wrench at its end to disassemble and assemble the corresponding bolts. When not in use, both ends of the wrench are retracted, which can quickly handle different types and models of bolts. At the same time, it is easy to store and carry, providing convenience for maintenance personnel, improving the efficiency of EMU maintenance, and ensuring the safety of EMU operation.

[0027] 2. When using the multi-functional wrench of this utility model, the socket wrench is directly pressed onto the bolt, and the bolt presses the inner socket into the elastic cavity. A socket of the same specification as the bolt is then fitted onto the bolt, and the bolt can be disassembled or assembled, thus realizing the self-adaptive function of the socket wrench.

[0028] 3. When using the multi-functional wrench of this utility model, the internal hex wrench is directly pressed onto the internal hex bolt. The internal hex bolt presses the outer internal hex socket into the elastic cavity, and the internal hex socket of the same specification as the bolt is inserted into the internal hex bolt. Then the internal hex bolt is disassembled and assembled, realizing the self-adaptation of the internal hex wrench. Attached Figure Description

[0029] Figure 1 This is a structural assembly diagram of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of this utility model.

[0030] Figure 2 This is an exploded view of the structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of this utility model.

[0031] Figure 3 This is a schematic diagram of the structure of one end of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of the other end of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of the present invention.

[0033] Figure 5 This is a cross-sectional view of the hand-held sleeve structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of this utility model.

[0034] Figure 6 This is a cross-sectional view of the intermediate sleeve structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of this utility model.

[0035] Figure 7 This is a schematic diagram of the structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, which is a combination of a socket wrench and an internal hex wrench.

[0036] Figure 8 This is a schematic diagram from another perspective of the structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, which connects the intermediate sleeve to the socket wrench and the internal hexagonal wrench.

[0037] Figure 9 This is a schematic diagram of the inner tube connection opening wrench structure of a multi-functional wrench for fastening bolts of VCB solenoid valves in high-speed trains, according to an embodiment of this utility model.

[0038] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-hand sleeve, 11-first limiting groove, 12-first ramp, 13-first rotating groove, 14-second ramp, 15-second rotating groove, 2-intermediate sleeve, 21-second limiting groove, 22-third ramp, 23-third rotating groove, 24-fourth ramp, 25-fourth rotating groove, 26-first limiting block, 27-first spring block, 3-inner tube, 31-second limiting block, 32-second spring block, 4-socket wrench, 5-internal hex wrench, 6-open-end wrench. Detailed Implementation

[0039] 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.

[0040] like Figure 1-9 As shown, this utility model embodiment provides a multi-functional wrench for tightening bolts of VCB solenoid valves in high-speed trains, comprising: a handheld sleeve 1, an intermediate sleeve 2 disposed within the handheld sleeve 1, and an inner tube 3 disposed within the intermediate sleeve 2. The intermediate sleeve 2 slides within the sleeve 1, forming a telescopic structure; the inner tube 3 slides within the intermediate sleeve 2, forming another telescopic structure. The multi-functional wrench of this utility model also includes a socket wrench 4, an internal hex wrench 5, and an open-end wrench 6. The socket wrench 4 and the internal hex wrench 5 are disposed at the end of either the intermediate sleeve 2 or the inner tube 3, and the open-end wrench 6 is disposed at the end of the other intermediate sleeve 2 or the inner tube 3. By extending the intermediate sleeve 2 or inner tube 3, the socket wrench 4, hex wrench 5, or open-end wrench 6 at its end can be used to disassemble and assemble the corresponding bolts. When not in use, the wrenches at both ends can be retracted, which can quickly deal with different types and models of bolts. At the same time, it is easy to store and carry, providing convenience for maintenance personnel, improving the efficiency of EMU maintenance, and ensuring the safety of EMU operation.

[0041] The handheld sleeve 1 is a hollow circular tube with at least one pair of first limiting grooves 11 axially formed on its inner surface. Each first limiting groove 11 penetrates the handheld sleeve 1 at one end, while the other end remains at a distance from the end face. A first rotating groove 13 is provided circumferentially at the penetrating end of the first limiting groove 11. This first rotating groove 13 is deeper than the first limiting groove 11, and the bottoms of the two grooves are connected by a first ramp 12. A second rotating groove 15 is provided circumferentially at the non-penetrating end of the first limiting groove 11. This second rotating groove 15 is deeper than the first limiting groove 11, and the bottoms of the two grooves are connected by a second ramp 14.

[0042] The intermediate sleeve 2 is also a hollow circular tube. One end of its outer surface is provided with a first limiting block 26 corresponding to the first limiting groove 11, and the other end is provided with a first spring block 27 corresponding to the first limiting groove 11. The end of the intermediate sleeve 2 with the first spring block 27 is always located inside the handheld sleeve 1, and the end with the first limiting block 26 serves as a telescopic end. When the intermediate sleeve 2 is retracted into the handheld sleeve 1, the first spring block 27 is positioned at the second rotating groove 15. The first limiting block 26 is fixed to the outer surface of the intermediate sleeve 2, while the first spring block 27 is embedded in the outer surface of the intermediate sleeve 2. Specifically, the surface of the intermediate sleeve 2 with the first spring block 27 is provided with an installation hole, and the first spring block 27 is located in the installation hole. The two are connected by a spring, and a limiting structure is provided at the opening of the installation hole and the first spring block 27. The first spring block 27 telescopically extends and retracts within the installation hole under the action of the spring and external force.

[0043] Understandably, in use, the intermediate sleeve 2 extends from the handheld sleeve 1, the first limiting block 26 passes through the first limiting groove 11 from one end, the first spring block 27 slides to the first rotating groove 13, and under the action of the spring, the first spring block 27 is pushed into the first rotating groove 13. Then the intermediate sleeve 2 is rotated, and it is limited by the first rotating groove 13 and the first spring block 27. Then, the handheld sleeve 1 is held and the wrench at the front end of the intermediate sleeve 2 is used.

[0044] At least one pair of second limiting grooves 21 are axially formed on the inner surface of the intermediate sleeve 2. Each second limiting groove 21 penetrates the intermediate sleeve 2 at one end, while the other end remains at a distance from the end face. A third rotating groove 23 is provided circumferentially at the penetrating end of the second limiting groove 21. This third rotating groove 23 is deeper than the second limiting groove 21, and the bottoms of the two grooves are connected by a third ramp 22. A fourth rotating groove 25 is provided circumferentially at the non-penetrating end of the second limiting groove 21. This fourth rotating groove 25 is deeper than the second limiting groove 21, and the bottoms of the two grooves are connected by a fourth ramp 24.

[0045] The inner tube 3 is a solid cylindrical structure. One end of its outer surface is provided with a second limiting block 31 corresponding to the second limiting groove 21, and the other end is provided with a second spring block 32 corresponding to the second limiting groove 21. The end of the inner tube 3 with the second spring block 32 is always located inside the intermediate sleeve 2, and the end with the second limiting block 31 serves as a telescopic end. When the inner tube 3 retracts into the intermediate sleeve 2, the second spring block 32 is positioned at the fourth rotating groove 25. The second limiting block 31 is fixed to the outer surface of the inner tube 3, while the second spring block 32 is embedded within the outer surface of the inner tube 3. Specifically, the surface of the inner tube 3 with the second spring block 32 has an opening for mounting. The second spring block 32 is placed within this mounting hole, and the two are connected by a spring. A limiting structure is provided at the opening of the mounting hole for the second spring block 32. The second spring block 32 telescopically extends and retracts within the mounting hole under the action of the spring and external force.

[0046] The socket wrench 4 and the Allen wrench 5 are simultaneously fixed to the end face of either the intermediate sleeve 2 or the inner tube 3, and are fixedly connected to each other. The socket wrench 4 has an elastic cavity at its rear end and multiple sleeves at its front end. These sleeves are nested together in multiple layers. The outermost sleeve is fixedly connected to the wall of the elastic cavity, and the inner sleeves are all connected to the elastic cavity via springs. In use, the socket wrench 4 is directly pressed onto the bolt. The bolt presses the inner sleeves into the elastic cavity, and a sleeve of the same specification as the bolt is fitted onto the bolt. The bolt can then be installed or removed, achieving self-adaptive operation of the socket wrench 4.

[0047] The rear end of the hex wrench 5 is also provided with a spring cavity, and its front end is provided with multiple hexagonal sockets. These multiple hexagonal sockets are nested together in multiple layers. The innermost hexagonal socket is fixedly connected to the bottom of the spring cavity, and the outer hexagonal sockets are all connected to the spring cavity by springs. In use, the hex wrench 5 is directly pressed onto the hexagonal bolt. The hexagonal bolt presses the outer hexagonal sockets into the spring cavity, and the hexagonal socket of the same specification as the bolt is inserted into the hexagonal bolt. Then the hexagonal bolt can be disassembled or assembled, realizing the self-adaptive function of the hex wrench 5.

[0048] As a further preferred embodiment, the open-end wrench 6 is an adjustable open-end wrench.

[0049] Understandably, during maintenance, it is sometimes necessary to determine whether bolts are loose based on torque, and the rated torque must also be used during installation to ensure that the bolts are neither too loose nor too tight. Therefore, a sensor is fixed circumferentially at one end of the first limiting groove 11 of the handheld sleeve 1 and the other end of the second limiting groove 21 of the intermediate sleeve 2. The sensor measures the pressure exerted by the intermediate sleeve 2 on the handheld sleeve 1 or the pressure exerted by the inner tube 3 on the intermediate sleeve 2 when the bolt is tightened, thereby calculating the bolt torque. The sensor is connected to a mobile device such as a mobile phone, and an alarm is triggered when the torque reaches a preset torque value. Alternatively, a display screen can be installed on the surface of the handheld sleeve 1, connected to the sensor via a signal to display the torque value, thus achieving the same function of monitoring torque. The sensor is preferably a pressure sensor.

[0050] 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 multifunctional wrench for fastening bolts of VCB electromagnetic valves, characterized in that, The utility model relates to a hand-held sleeve pipe (1), intermediate sleeve pipe (2) and inner tube (3) are included. The intermediate sleeve pipe (2) slides in the sleeve pipe (1), and the both constitute a telescopic structure, and the inner tube (3) slides in the intermediate sleeve pipe (2), and the both constitute another telescopic structure. The end of one of the intermediate sleeve pipe (2) or inner tube (3) is equipped with sleeve wrench (4) and internal hexagonal wrench (5), and the end of the other of the intermediate sleeve pipe (2) or inner tube (3) is equipped with open wrench (6). The hand-held sleeve pipe (1) is hollow circular pipe, and the inner surface is opened at least a pair of first limiting slot (11) along the axial direction, and only one end of the first limiting slot (11) penetrates the hand-held sleeve pipe (1), and the other end keeps away from the end face.

2. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of a motor train unit according to claim 1, characterized in that, The end of the first limiting slot (11) penetrates and is equipped with the first rotation slot (13) along the circumference, and the first rotation slot (13) is deeper than the first limiting slot (11), and the groove bottom of the both is connected through the first slope (12).

3. The multifunctional wrench for the VCB electromagnetic valve fastening bolt according to claim 2, characterized in that, The end of the first limiting slot (11) does not penetrate and is equipped with the second rotation slot (15) along the circumference, and the second rotation slot (15) is deeper than the first limiting slot (11), and the groove bottom of the both is connected through the second slope (14). The intermediate sleeve pipe (2) is hollow circular pipe, and the outer surface is equipped with the first limiting block (26) at the corresponding position of the first limiting slot (11) on one end, and is equipped with the first elastic block (27) at the corresponding position of the first limiting slot (11) on the other end.

4. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of the motor train unit according to claim 3, characterized in that, The end of the intermediate sleeve pipe (2) equipped with the first elastic block (27) is always arranged in the inside of the hand-held sleeve pipe (1), and the end equipped with the first limiting block (26) is as telescopic end. The first limiting block (26) is fixed on the outer surface of the intermediate sleeve pipe (2), and the first elastic block (27) is embedded in the outer surface of the intermediate sleeve pipe (2), and specifically, 5. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of a motor train unit according to claim 4, characterized in that, The end surface of the intermediate sleeve pipe (2) equipped with the first elastic block (27) is provided with the installation hole, and the first elastic block (27) is arranged in the installation hole, and the both are connected through the spring, and the first elastic block (27) and the hole mouth of the installation hole are equipped with the limiting structure. The inner surface of the intermediate sleeve pipe (2) is opened at least a pair of second limiting slot (21) along the axial direction, and only one end of the second limiting slot (21) penetrates the intermediate sleeve pipe (2), and the other end keeps away from the end face.

6. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of any one of claims 1-5, characterized in that, The end of the second limiting slot (21) penetrates and is equipped with the third rotation slot (23) along the circumference, and the third rotation slot (23) is deeper than the second limiting slot (21), and the groove bottom of the both is connected through the third slope (22).

7. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of a motor train unit according to claim 6, characterized in that, The end of the second limiting slot (21) does not penetrate and is equipped with the fourth rotation slot (25) along the circumference, and the fourth rotation slot (25) is deeper than the second limiting slot (21), and the groove bottom of the both is connected through the fourth slope (24). The outer surface of the inner tube (3) is equipped with the second limiting block (31) at the corresponding position of the second limiting slot (21) on one end, and is equipped with the second elastic block (32) at the corresponding position of the second limiting slot (21) on the other end.

8. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of the motor train unit according to claim 7, characterized in that, The end of the inner tube (3) equipped with the second elastic block (32) is always arranged in the inside of the intermediate sleeve pipe (2), and the end equipped with the second limiting block (31) is as telescopic end. ​ 9. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of claim 8, wherein, The second limiting block (31) is fixed to the outer surface of the inner tube (3), and the second elastic block (32) is embedded in the outer surface of the inner tube (3), specifically: The inner tube (3) is provided with an installation hole on one end surface of the second elastic block (32), the second elastic block (32) is arranged in the installation hole, and the two are connected through a spring, and the second elastic block (32) is provided with a limiting structure at the hole opening of the installation hole.

10. The multifunctional wrench for the VCB electromagnetic valve fastening bolt of any one of claims 1-5, characterized in that, The rear end of the sleeve wrench (4) is provided with an elastic cavity, and the front end is provided with a plurality of sleeves, the plurality of sleeves are mutually sleeved to form multiple layers, the outermost sleeve is fixedly connected between the cavity wall of the elastic cavity, and the inner layer of the sleeve is connected between the elastic cavity through a spring. The rear end of the inner hexagonal wrench (5) is also provided with an elastic cavity, and the front end is provided with a plurality of inner hexagonal columns, the plurality of inner hexagonal columns are mutually sleeved to form multiple layers, the innermost inner hexagonal column is fixedly connected between the bottom of the elastic cavity, and the outer layer of the inner hexagonal column is connected between the elastic cavity through a spring.

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