A handheld subway car joint inspection and repair operation device

Abstract

The utility model relates to subway car joint overhauling device technical field discloses a handheld subway car joint overhauling operation device, including the shell, the bottom left end fixed connection of shell has the handle, the right end of shell is provided with the function shell, the right end of function shell is provided with quick release mechanism, the adjacent between shell with function shell is provided with folding mechanism, quick release mechanism includes the placement shell, the outer wall fixed connection of placement shell in the outer wall right end front side of function shell, the outer wall all rotationally connected with right angle clamp jaw in the four quarters of placement shell. In the utility model, right angle clamp jaw can preliminarily clamp the detection module in placement shell under the spring one elasticity, when dismounting placement shell, only need to press down placement shell, caliper one and taper block two contact are compressed, thereby remove the fixation of fixed column, then can quickly take out placement shell, thereby quickly dismount and replace detection module.

Description

Technical Field

[0001] This utility model relates to the technical field of subway car maintenance devices, and in particular to a handheld subway car maintenance operation device. Background Technology

[0002] The handheld metro vehicle-to-vehicle (V2V) maintenance device is a portable maintenance tool specifically designed for metro vehicles and their associated diesel locomotives. It is primarily used on metro operating lines, in depots, and maintenance workshops. Its core functions include monitoring the engine operating condition of diesel locomotives, monitoring brake system pressure, testing electrical circuit continuity, and diagnosing and collecting data on faults in the metro vehicle's V2V system. This assists maintenance personnel in quickly locating equipment anomalies, ensuring the safe operation and efficient maintenance of metro vehicles and diesel locomotives.

[0003] Traditional devices mainly consist of three basic structures: first, single-function detection modules with no data exchange between modules; second, wired connection components that need to be matched with the interface models of different devices; and third, a mechanical casing and a simple display screen that can only display basic detection data. In use, maintenance personnel must carry multiple independent modules to the work site, first connecting them to the detection ports of diesel locomotives or subway vehicles via interface converters, manually switching between different modules to complete the sub-items of testing, and manually recording and analyzing the detection data. This type of device has significant drawbacks: carrying multiple modules is inconvenient, increasing the burden on maintenance personnel, especially when working in subway tunnels or under vehicles, resulting in poor flexibility; furthermore, wired connections are easily limited by cable length, and frequent plugging and unplugging of interfaces can cause wear and tear on the equipment interfaces.

[0004] The existing technology has been improved by integrating the functional modules of diesel locomotive engine testing and metro vehicle communication diagnostics into a single device through integrated design. It is equipped with a touch-screen high-definition display screen, supports simultaneous display of multiple parameters and data correlation analysis, and reduces the number of devices carried. Secondly, it replaces the traditional wired connection with wireless connection technology to realize wireless data transmission with the testing interfaces of diesel locomotives and metro vehicles. It is also compatible with multiple interface protocols, eliminating the need for frequent converter replacement and improving operational flexibility. However, in daily use, when the testing module is damaged or routine maintenance is required, it is not possible to quickly replace and disassemble the testing module, thus affecting the efficiency of operation and maintenance. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a handheld subway car maintenance device, which aims to improve the problem in the prior art that the detection module cannot be quickly replaced and disassembled when it is damaged or needs to be maintained in daily life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a handheld subway car maintenance device, comprising a housing, a handle fixedly connected to the bottom left end of the housing, a functional shell provided at the right end of the housing, a quick-release mechanism provided at the right end of the functional shell, and a folding mechanism provided between the adjacent housing and the functional shell.

[0007] The quick-release mechanism includes a placement shell. The outer wall of the placement shell is fixedly connected to the front right side of the outer wall of the functional shell. Right-angle grippers are rotatably connected around the outer wall of the placement shell. A spring is fixedly connected between each of the right-angle grippers and the adjacent parts of the placement shell. A fixing post is fixedly connected to the left end of the outer wall of the placement shell. A conical block is fixedly connected to the left end of the fixing post. A second conical block is slidably connected to the left end of the fixing post. A buffer assembly is provided in the middle of the outer wall of the fixing post. A caliper is slidably connected to the right front end of the inner wall of the functional shell. A spring is fixedly connected to the front end of the caliper. The front end of the spring is fixedly connected to the right front end of the inner wall of the functional shell. The caliper engages with the left end of the fixing post.

[0008] As a further description of the above technical solution:

[0009] The folding mechanism includes two rings II. The outer walls of the two rings II are respectively fixedly connected to the top right side of the outer shell and the outer left end of the functional shell. The inner walls of the two rings II are rotatably connected to a rotating shaft. Two magnets are fixedly connected to the top right side of the functional shell and the top left side of the outer shell. Cylinders are fixedly connected to the front and rear sides of the left end of the inner wall of the functional shell. Calipers II are rotatably connected to the outer walls of the two cylinders. Buttons are fixedly connected to the opposite sides of the two calipers II. Springs IV are fixedly connected between adjacent calipers II. The adjacent sides of the two springs IV are fixedly connected to the front and rear ends of the corresponding inner walls of the functional shell.

[0010] As a further description of the above technical solution:

[0011] The buffer assembly includes a fixed ring, the inner wall of which is fixedly connected to the right end of the fixed column, a second spring fixedly connected to the left end of the fixed ring, a first ring fixedly connected to the left end of the second spring, and the inner wall of the first ring slidably connected to the middle of the outer wall of the fixed column.

[0012] As a further description of the above technical solution:

[0013] A touch screen is fixedly connected to the rear top of the housing, and multiple function buttons are fixedly connected to the front top of the housing.

[0014] As a further description of the above technical solution:

[0015] A battery compartment is provided at the left end of the outer casing, a protective plate is fixedly connected to the left end of the outer casing, and a charging port is provided at the left end of the front side of the outer wall of the outer casing.

[0016] As a further description of the above technical solution:

[0017] A light bulb is fixedly connected to the rear right side of the outer wall of the functional housing, a switch is slidably connected to the front side of the outer wall of the housing, and a tool interface is fixedly connected to the bottom of the functional housing.

[0018] As a further description of the above technical solution:

[0019] A rubber anti-slip pad is fixedly connected to the right end of the grip, and a sponge pad is fixedly connected to the top of the functional shell.

[0020] As a further description of the above technical solution:

[0021] An operating end is fixedly connected to the inner wall of the functional shell, and a laser emitter is fixedly connected to the inner wall of the right end of the functional shell.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the right-angle gripper can initially clamp the detection module in the placement shell under the elastic force of spring one, and caliper one engages with the left end of the fixing column under the action of spring three, realizing the quick locking and unlocking of the entire mechanism and the functional shell. When disassembling and assembling the placement shell, it is only necessary to press down on the placement shell, and caliper one and conical block two are compressed upon contact, thereby releasing the fixing of the fixing column, and then the placement shell can be quickly taken out, greatly shortening the disassembly and assembly time, thereby quickly disassembling and replacing the detection module.

[0024] 2. In this utility model, the second ring is fixed to the outer shell and the functional shell respectively. The rotating shaft provides a rotational basis for the folding of the outer shell and the functional shell. Pressing the button can drive the second caliper to rotate along the cylinder and compress the fourth spring to release the fixation. After folding, the magnets between the outer shell and the functional shell attract each other to achieve stable fixation and prevent random rotation. The size of the equipment is greatly reduced in the folded state, which improves the problem of inconvenient placement and enhances the convenience of using the equipment. Attached Figure Description

[0025] Figure 1 This is a perspective view of a handheld subway car maintenance device proposed in this utility model;

[0026] Figure 2 This is a front view of a handheld subway car maintenance device proposed in this utility model;

[0027] Figure 3 This is a top view of a handheld subway car maintenance device proposed in this utility model;

[0028] Figure 4 This is a split view of the battery compartment of a handheld subway car maintenance device proposed in this utility model.

[0029] Figure 5 This is a cross-sectional view of the functional shell of a handheld subway car maintenance device proposed in this utility model.

[0030] Figure 6 This is a structural schematic diagram of the quick-release mechanism of a handheld subway car maintenance device proposed in this utility model;

[0031] Figure 7 This is a structural exploded view of the buffer assembly of a handheld subway car maintenance device proposed in this utility model;

[0032] Figure 8 This is a schematic diagram of the folding mechanism of a handheld subway car maintenance device proposed in this utility model.

[0033] Legend:

[0034] 1. Outer shell; 2. Handle; 3. Functional shell; 4. Quick-release mechanism; 401. Placement shell; 402. Right-angle gripper; 403. Spring 1; 404. Fixing post; 405. Conical block 1; 406. Conical block 2; 407. Buffer assembly; 4071. Fixing ring; 4072. Spring 2; 4073. Circular ring 1; 408. Caliper 1; 409. Spring 3; 5. Folding mechanism; 501. Circular ring 2; 502. Rotating shaft; 503. Magnet; 504. Cylinder; 505. Caliper 2; 506. Button; 507. Spring 4; 6. Touch screen; 7. Function button; 8. Battery compartment; 9. Protective plate; 10. Charging port; 11. Light; 12. Switch; 13. Tool interface; 14. Rubber anti-slip pad; 15. Sponge pad; 16. Laser emitter; 17. Running end. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figure 1 and Figure 6This utility model provides an embodiment of a handheld subway car maintenance device, including a housing 1, which is the core load-bearing component of the device and is elongated in shape. A handle 2 is fixedly connected to the bottom left end of the housing 1 to provide a gripping support for the operator, making it easy to operate with one or two hands. A functional housing 3 is provided on the right end of the housing 1, which is the core component for expanding the function and is the installation shell for the core module of the device to realize the maintenance function. A quick-release mechanism 4 is provided on the right end of the functional housing 3 to quickly assemble and disassemble the testing module, adapting to different types of subway car maintenance needs. A folding mechanism 5 is provided between the adjacent housing 1 and the functional housing 3 to reduce the space occupied when the device is not in use.

[0037] The quick-release mechanism 4 includes a placement shell 401, providing mounting slots for the detection module to ensure accurate positioning of the detection element. The outer wall of the placement shell 401 is fixedly connected to the front right side of the outer wall of the functional shell 3. Right-angle grippers 402 are rotatably connected around the outer wall of the placement shell 401. Springs 403 are fixedly connected between each pair of right-angle grippers 402 and adjacent parts of the placement shell 401. The spring force of the springs 403 drives the grippers to clamp, preventing the module from loosening or falling off during maintenance. A fixing post 404 is fixedly connected to the left end of the outer wall of the placement shell 401, serving as a bridge connecting the placement shell 401 and the functional shell 3. A conical block 405 is fixedly connected to the left end of the fixing post 404, and a sliding connection is made to the left end of the fixing post 404. Conical block 2 406, conical block 1 405 plus conical block 2 406: work together to achieve quick positioning and engagement of fixed post 404. During disassembly and assembly, the conical surface guides and improves the efficiency of module replacement. A buffer component 407 is provided in the middle of the outer wall of fixed post 404 to protect conical block 2 406 from damage during installation or maintenance collisions. A caliper 1 408 is slidably connected to the front right end of the inner wall of functional shell 3. A spring 3 409 is fixedly connected to the front end of caliper 1 408. Caliper 1 408 plus spring 3 409 lock the quick release mechanism 4 to prevent fixed post 404 from loosening. The front end of spring 3 409 is fixedly connected to the front right end of the inner wall of functional shell 3. Caliper 1 408 engages with the left end of fixed post 404.

[0038] Specifically, the placement shell 401 provides an installation slot for the detection module, ensuring accurate positioning of the detection element. Its outer wall is fixed to the front right side of the outer wall of the functional shell 3. Right-angle grippers 402 are rotatably connected around the outer wall of the placement shell 401. Springs 403 are fixed at the adjacent points of the multiple right-angle grippers 402 and the placement shell 401. The elastic force of the springs 403 can drive the right-angle grippers 402 to clamp, preventing the detection module from loosening or falling off during maintenance. The fixing post 404 fixed at the left end of the outer wall of the placement shell 401 serves as a bridge connecting the placement shell 401 and the functional shell 3. A conical block 405 is fixed at its left end and a second conical block 406 is slidably connected. The cooperation of the first conical block 405 and the second conical block 406 can realize the fixing post 404. The quick-release mechanism 4 is designed for rapid positioning and engagement. A tapered guide surface during assembly and disassembly improves the efficiency of module replacement. A buffer component 407 is located in the middle of the outer wall of the fixing column 404 to protect the tapered block 406 from damage in the event of a collision during installation or maintenance. A caliper 408 is slidably connected to the right front end of the inner wall of the functional housing 3. A spring 409 is fixed to the front end of the caliper 408, and the front end of the spring 409 is fixed to the right front end of the inner wall of the functional housing 3. The caliper 408 engages with the left end of the fixing column 404, thereby locking the quick-release mechanism 4 and preventing the fixing column 404 from loosening. All components work together to ensure the quick-release mechanism 4 is stable and reliable during the installation, positioning, maintenance, and fixing of the detection module, while simultaneously improving assembly and disassembly efficiency and component protection.

[0039] Reference Figure 1 , Figure 3 and Figure 8 The folding mechanism 5 includes two rings 501 as the core rotating components. The outer walls of the two rings 501 are fixedly connected to the top right side of the outer shell 1 and the outer left side of the functional shell 3, respectively. The inner walls of the two rings 501 are rotatably connected to a rotating shaft 502. The rings 501 and the rotating shaft 502 form the rotation fulcrum for folding, allowing the functional shell 3 to rotate relative to the outer shell 1 around the rotating shaft 502. Two magnets 503 are fixedly connected to the top right side of the functional shell 3 and the top left side of the outer shell 1. After folding, the outer shell 1 and the functional shell 3 are magnetically attracted to each other, preventing them from rotating randomly when idle. The inner wall of the functional shell 3 is fixedly connected to the front and rear sides of the left end of the shell, providing a fixed support point for subsequent components. The outer walls of the two cylinders 504 are rotatably connected to the calipers 505. The opposite sides of the two calipers 505 are fixedly connected to the buttons 506. The buttons 506 can drive the calipers to rotate in the cylinders 504. The adjacent sides of the two calipers 505 are fixedly connected to the springs 507. The springs 507 drive the calipers and buttons 506 to reset, while ensuring that the calipers are clamped in the slots of the outer shell 1. The adjacent sides of the two springs 507 are fixedly connected to the front and rear ends of the inner wall of the corresponding functional shell 3.

[0040] Specifically, two circular rings 501 serve as core rotating components, with their outer walls fixedly connected to the top right side of the outer shell 1 and the left end of the outer wall of the functional shell 3, respectively. The inner walls of the two circular rings 501 are rotatably connected to a rotating shaft 502. The circular rings 501 and the rotating shaft 502 form a folded rotation fulcrum, allowing the functional shell 3 to rotate relative to the outer shell 1 around the rotating shaft 502. Two magnets 503 are fixedly connected to the top right side of the functional shell 3 and the top left side of the outer shell 1. After folding, the outer shell 1 and the functional shell 3 are magnetically attracted, preventing them from rotating arbitrarily when idle. Cylinders 504 are fixedly connected to the front and rear sides of the left end of the inner wall of the functional shell 3, providing fixed fulcrums for subsequent components. The outer walls of each cylinder 504 are rotatably connected to calipers 505. Buttons 506 are fixedly connected to the opposite sides of the two calipers 505. Buttons 506 can drive calipers 505 to rotate on cylinder 504. Springs 507 are fixedly connected between adjacent calipers 505. Springs 507 drive calipers 505 and buttons 506 to reset, while ensuring that calipers 505 are locked in the slots of outer shell 1. The adjacent sides of the two springs 507 are fixedly connected to the front and rear ends of the inner walls of the corresponding functional shell 3. The cooperation of each component realizes the stable folding and fixing of the functional shell 3 relative to the outer shell 1, ensuring the reliability of the folded state and the convenience of use.

[0041] Reference Figure 3 , Figure 4 and Figure 7 The buffer assembly 407 includes a fixing ring 4071, which serves as the fixed mounting point for the buffer assembly 407. The inner wall of the fixing ring 4071 is fixedly connected to the right end of the fixing column 404. A second spring 4072 is fixedly connected to the left end of the fixing ring 4071, which buffers the impact force through the spring force. A first ring 4073 is fixedly connected to the left end of the second spring 4072, which contacts the second conical block 406 and plays a buffering role. The inner wall of the first ring 4073 is slidably connected to the middle of the outer wall of the fixing column 404. A touch screen 6 is fixedly connected to the rear top of the outer casing 1, which is a visual operation and data display interface that can display maintenance data and device operating status in real time. It also supports touch screen operation. Multiple function buttons 7 are fixedly connected to the front top of the outer casing 1 for quick operation, which is used to trigger frequently used functions and improve the efficiency of command issuance. A battery compartment 8 is provided on the left end of the outer casing 1 for storing replaceable batteries to provide power to the device. A protective plate 9 is fixedly connected to the left end of the outer casing 1 to prevent external collisions, dust or liquids from entering the battery compartment 8, avoid battery short circuits and damage, and protect the operator's hands from being scratched by the edge of the battery compartment 8. A charging port 10 is provided on the left end of the front side of the outer wall of the outer casing 1, which is a battery charging interface that can be directly connected to a charger to charge the battery in the battery compartment 8.

[0042] Specifically, in the buffer assembly 407, the fixing ring 4071 serves as the fixing mounting point of the buffer assembly 407, and its inner wall is fixedly connected to the right end of the fixing column 404. The left end of the fixing ring 4071 is fixedly connected to the second spring 4072, which buffers the impact force through the spring force. The left end of the second spring 4072 is fixedly connected to the first ring 4073, which contacts the second conical block 406 to play a buffering role. The inner wall of the first ring 4073 is slidably connected to the middle of the outer wall of the fixing column 404. The top rear side of the outer shell 1 is fixedly connected to the touch screen 6, which serves as a visual operation and data display interface. It can display maintenance data and device operating status in real time, and also supports touch screen operation. The top front side of the outer shell 1 is fixed Multiple function buttons 7 are connected for quick operation, triggering frequently used functions and improving command issuance efficiency. A battery compartment 8 is located on the left end of the outer casing 1 to hold replaceable batteries to provide power to the device. A protective plate 9 is fixedly connected to the left end of the outer casing 1 to prevent external collisions, dust or liquids from entering the battery compartment 8, avoiding battery short circuits and damage, and protecting the operator's hands from being scratched by the edge of the battery compartment 8. A charging port 10 is located on the front left end of the outer wall of the outer casing 1 as a battery charging interface, which can be directly connected to a charger to charge the battery in the battery compartment 8. These components play a role in buffer protection, operation control, power supply and protection, respectively, to ensure stable operation and ease of operation of the device.

[0043] Reference Figure 1 , Figure 2 and Figure 5 A light 11 is fixedly connected to the rear right side of the outer wall of the functional shell 3, providing a light source in dark environments to ensure that the operator can clearly observe the status of the test points. A switch 12 is slidably connected to the front side of the outer wall of the shell 1, which turns the light 11 on or off by sliding. A tool interface 13 is fixedly connected to the bottom of the functional shell 3, which is an external tool expansion interface that can connect small maintenance tools to improve maintenance efficiency. A rubber anti-slip pad 14 is fixedly connected to the right end of the handle 2 to prevent the operator's hands from sweating or the device from vibrating, ensuring that the device can be held stably during maintenance and avoiding damage or testing errors due to slipping. A sponge pad 15 is fixedly connected to the top of the functional shell 3 to protect the screen of the touch screen 6 from wear when the device is folded. The inner wall of the functional shell 3 is fixedly connected to the running end 17, which is the data processing core of the device. It performs analysis and calculation, and feeds back the processing results to the touch screen 6 for display. The inner wall of the right end of the functional shell 3 is fixedly connected to the laser emitter 16, which is an auxiliary positioning tool. During maintenance, it emits a laser beam to accurately align with the detection points of the subway car-connected equipment, avoiding detection errors caused by visual judgment deviation.

[0044] Specifically, a light 11 is fixedly connected to the rear right side of the outer wall of the functional shell 3 to provide a light source in dark environments, ensuring that the operator can clearly observe the status of the detection points. A switch 12 is slidably connected to the front side of the outer wall of the shell 1. The switch 12 turns the light 11 on or off by sliding. A tool interface 13 is fixedly connected to the bottom of the functional shell 3 as an external tool expansion interface, which can connect small maintenance tools to improve maintenance efficiency. A rubber anti-slip pad 14 is fixedly connected to the right end of the handle 2 to prevent the operator's hands from sweating or the device from vibrating, ensuring that the device can be held stably during maintenance and avoiding damage or detection errors due to slipping. A sponge pad 15 is fixedly connected to the top of the functional shell 3 to protect the screen of the touch screen 6 from wear when the device is folded. The housing 401 houses the detection module, which directly contacts or senses the metro vehicle-connected equipment to collect equipment operation data. The inner wall of the functional housing 3 is fixedly connected to the operating end 17, which serves as the data processing core of the device, performing analysis and calculation. At the same time, the processing results are fed back to the touch screen 6 for display, and real-time data is exchanged with the vehicle TCMS and the ground operation and maintenance platform. The inner wall of the right end of the functional housing 3 is fixedly connected to the laser emitter 16, which serves as an auxiliary positioning tool. During maintenance, it emits a laser beam to accurately align with the detection points of the metro vehicle-connected equipment, avoiding detection errors caused by visual judgment deviations. These components work together to ensure that maintenance work is carried out efficiently and accurately, providing lighting, operation control, tool expansion, grip stability, component protection, data acquisition and processing, and precise positioning.

[0045] Working principle: When in use, hold the handle 2. The rubber anti-slip pad 14 will prevent the operator's hands from slipping due to sweat. Then, start the detection module to detect the subway car or diesel locomotive via the touch screen 6. First, embed the detection module into the mounting slot of the placement shell 401. The slot structure of the placement shell 401 directly ensures the accurate positioning of the detection element and avoids installation misalignment affecting the detection accuracy. Then, push the placement shell 401 so that it moves to the connection position of the functional shell 3 through the fixing post 404. At this time, the cone-shaped block 405 and cone-shaped block 406 on the left end of the fixing post 404 form a guide structure. The cone surface automatically calibrates the position during the advancement, eliminating the need for repeated manual alignment and greatly improving installation efficiency. At the same time, the buffer component 407 on the outer wall of the fixing post 404... Simultaneously, when the conical block 406 contacts the inner wall of the functional housing 3, the spring 4072 in the buffer assembly 407 transmits elastic force through the ring 4073 to offset the impact force during installation, preventing damage to the conical block 406 due to hard contact and extending the service life of the component. When the fixing post 404 is pushed to the designated position, the caliper 408 on the inner wall of the functional housing 3 automatically pops out under the elastic force of the spring 409 and engages with the left end of the fixing post 404, forming a double locking structure. On the one hand, the right-angle gripper 402, driven by the spring 403, clamps the connection between the housing 401 and the functional housing 3, preventing the detection module from loosening during equipment operation. On the other hand, the caliper 408... The engagement between 408 and the fixing post 404 directly prevents the fixing post 404 from accidentally coming loose, ensuring the stable operation of the detection module. When the detection module needs to be repaired or replaced, simply press down on the placement shell 401, and caliper 408 and conical block 406 will contact each other, thereby compressing spring 409. Then pull out the placement shell 401, at which point caliper 408 will contact conical block 405. When conical block 405 leaves, caliper 408 will expand due to spring 409, thereby releasing the fixing of the fixing post 404. Then the placement shell 401 can be quickly removed, greatly shortening the disassembly and assembly time, thus allowing for quick replacement and disassembly of the detection module.

[0046] During the unfolding phase of the equipment, the folding mechanism 5 first establishes stable support through the core rotating component. Two rings 501 are fixed to the top right side of the outer shell 1 and the left end of the outer wall of the functional shell 3, respectively. The rotating shaft 502, rotatably connected to the inner wall of the rings 501, forms the folding rotation fulcrum. The functional shell 3 can rotate flexibly relative to the outer shell 1 around the rotating shaft 502 until the equipment unfolds to the preset working angle. At this time, the caliper 505 on the inner wall of the functional shell 3 automatically resets under the elastic force of the spring 507 and snaps into the corresponding slot in the outer shell 1. The two ends of the spring 507 are connected to the caliper 505 and the inner wall of the functional shell 3, respectively. Through its own elasticity, the caliper 505 is driven to maintain the snapping state, while simultaneously driving the button 506 to return to the initial position, forming a reliable locking structure. This prevents the functional shell 3 from rotating relative to the outer shell 1 during equipment operation, ensuring operational stability. When the equipment needs to be folded... When folding, press the buttons 506 on both sides inward. The buttons 506 drive the caliper 2 505 to rotate around the cylinder 504. The cylinder 504 provides a fixed rotation fulcrum for the caliper 2 505. At this time, the spring 4 507 is compressed, and the caliper 2 505 disengages from the slot of the outer shell 1, releasing the locked state. Then, the functional shell 3 rotates around the rotation axis 502 until the functional shell 3 fits against the outer shell 1. During this process, the magnets 503 on the top right of the functional shell 3 and the top left of the outer shell 1 approach each other and generate magnetic attraction, automatically fixing the folded position and preventing them from rotating randomly when idle. No additional fixing operation is required, which greatly reduces the size of the device after folding and reduces the storage space occupied. When unfolded, it can be automatically locked by the spring-driven calipers, taking into account both the convenience of storage and the stability of use. This improves the pain points of the existing technology, such as cumbersome storage steps and large space occupation.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 handheld subway car maintenance device, comprising a housing (1), characterized in that: A handle (2) is fixedly connected to the bottom left end of the outer shell (1), a functional shell (3) is provided at the right end of the outer shell (1), a quick release mechanism (4) is provided at the right end of the functional shell (3), and a folding mechanism (5) is provided between the adjacent outer shell (1) and the functional shell (3). The quick-release mechanism (4) includes a placement shell (401). The outer wall of the placement shell (401) is fixedly connected to the front right side of the outer wall of the functional shell (3). Right-angle grippers (402) are rotatably connected around the outer wall of the placement shell (401). A spring (403) is fixedly connected between each of the multiple right-angle grippers (402) and the adjacent parts of the placement shell (401). A fixing post (404) is fixedly connected to the left end of the outer wall of the placement shell (401). A conical block is fixedly connected to the left end of the fixing post (404). A cone-shaped block (406) is slidably connected to the left end of the fixed column (404). A buffer assembly (407) is provided in the middle of the outer wall of the fixed column (404). A caliper (408) is slidably connected to the right end of the inner wall of the functional shell (3). A spring (409) is fixedly connected to the front end of the caliper (408). The front end of the spring (409) is fixedly connected to the right end of the front side of the inner wall of the functional shell (3). The caliper (408) engages with the left end of the fixed column (404).

2. The handheld subway car maintenance device according to claim 1, characterized in that: The folding mechanism (5) includes two rings (501). The outer walls of the two rings (501) are fixedly connected to the right side of the top of the outer shell (1) and the left side of the outer wall of the functional shell (3), respectively. The inner walls of the two rings (501) are rotatably connected to a rotating shaft (502). The right side of the top of the functional shell (3) and the left side of the top of the outer shell (1) are both fixedly connected to two magnets (503). The front and rear sides of the left side of the inner wall of the functional shell (3) are both fixedly connected to cylinders (504). The outer walls of the two cylinders (504) are rotatably connected to calipers (505). Buttons (506) are fixedly connected to the opposite sides of the two calipers (505). Springs (507) are fixedly connected between adjacent calipers (505). The adjacent sides of the two springs (507) are fixedly connected to the front and rear ends of the inner wall of the corresponding functional shell (3).

3. The handheld subway car maintenance device according to claim 1, characterized in that: The buffer assembly (407) includes a fixing ring (4071), the inner wall of which is fixedly connected to the right end of the fixing post (404), the left end of which is fixedly connected to a second spring (4072), the left end of which is fixedly connected to a first ring (4073), and the inner wall of the first ring (4073) is slidably connected to the middle of the outer wall of the fixing post (404).

4. The handheld subway car maintenance device according to claim 1, characterized in that: A touch screen (6) is fixedly connected to the rear top of the housing (1), and multiple function buttons (7) are fixedly connected to the front top of the housing (1).

5. The handheld subway car maintenance device according to claim 1, characterized in that: A battery compartment (8) is provided at the left end of the outer shell (1), a protective plate (9) is fixedly connected to the left end of the outer shell (1), and a charging port (10) is provided at the left end of the front side of the outer wall of the outer shell (1).

6. The handheld subway car maintenance device according to claim 1, characterized in that: A light bulb (11) is fixedly connected to the rear right side of the outer wall of the functional shell (3), a switch (12) is slidably connected to the front side of the outer wall of the outer shell (1), and a tool interface (13) is fixedly connected to the bottom of the functional shell (3).

7. The handheld subway car maintenance device according to claim 1, characterized in that: A rubber anti-slip pad (14) is fixedly connected to the right end of the grip (2), and a sponge pad (15) is fixedly connected to the top end of the functional shell (3).

8. The handheld subway car maintenance device according to claim 1, characterized in that: The inner wall of the functional shell (3) is fixedly connected to the operating end (17), and the inner wall of the right end of the functional shell (3) is fixedly connected to the laser emitter (16).

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