A track trolley that can be quickly connected and locked

Abstract

This utility model discloses a railcar that can be quickly connected and locked, relating to the field of railway vehicle technology. It includes a first car body and a second car body that are connected together. The first and second car bodies are quickly connected and locked together via a locking mechanism. The locking mechanism includes: an operating arm, one end of which is hinged to the first car body, and the other end is detachably connected to a locking shaft; a locking pin, which is axially slidably connected to the end of the locking shaft; an elastic element, which is installed inside the locking shaft, and its two ends are respectively connected to the locking shaft and the locking pin; and a connecting post, which is fixed to the second car body and has a pin hole corresponding to the head of the locking pin. Under the action of the elastic element, the locking pin can be engaged in the pin hole, realizing the connection and locking of the first and second car bodies. The car body connection is completed by pressing down the operating arm, increasing the connection speed. The elastic element continuously provides locking force, causing the locking pin to engage in the pin hole, effectively preventing loosening or disengagement due to vibration or impact.

Description

Technical Field

[0001] This utility model relates to the field of railway track vehicle technology, and more specifically to a track trolley that can be quickly connected and locked. Background Technology

[0002] In the construction, installation, and routine maintenance of railway electromechanical equipment, railcars that can run on steel rails are often used to transport tools, equipment, and other materials. Traditional railcars are designed as a single unit, resulting in a large weight and size, which is inconvenient for transportation in actual use, especially when transferring them in confined spaces. To improve transportation flexibility and adapt to different load requirements, designing railcars as units that can be quickly assembled from multiple independent car body modules has become a development trend. Therefore, the connection mechanism between car body modules has become a key factor affecting the overall operational efficiency and safety of the equipment.

[0003] Currently, there are two main known methods for connecting the bodies of track trolleys: First, rigid connections using bolts and nuts. While this method provides a secure connection, it is extremely inconvenient to operate, requiring operators to carry specialized tools and tighten multiple bolts, which is time-consuming and labor-intensive, reducing operational efficiency and failing to meet the demands of rapid on-site response. Second, simple pin connections. Although this method is simpler to operate than bolt connections, it relies solely on the gravity of the pin or simple insertion for fixation, lacking an effective locking force maintenance and anti-loosening mechanism. During trolley operation, continuous vibration and impact can easily cause the pin to loosen or even completely dislodge, potentially leading to separation of the trolley bodies.

[0004] Therefore, how to provide a track trolley that is easy to operate and can quickly achieve locking is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a track trolley that can be quickly connected and locked, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A railcar capable of quick connection and locking includes a first car body and a second car body that dock together. The first car body and the second car body are quickly connected and locked together by a locking mechanism, the locking mechanism comprising:

[0008] An operating arm, one end of which is hinged to the first vehicle body, and the other end is detachably connected to a locking shaft;

[0009] A locking pin, which is axially slidably connected to the end of the locking shaft;

[0010] An elastic element is installed inside the locking shaft, and its two ends are respectively connected to the locking shaft and the locking pin;

[0011] A connecting post is fixed to the second vehicle body. The connecting post has a pin hole corresponding to the head of the locking pin. The locking pin can be inserted into the pin hole under the action of the elastic element, thereby realizing the connection and locking of the first vehicle body and the second vehicle body.

[0012] Through the above technical solution, this utility model provides a track trolley that can be quickly connected and locked. It constructs a swing-pressing automatic locking mechanism. The hinged design of the operating arm and the automatic locking pin engagement function allow the trolley body to be connected simply by pressing down the operating arm, thus improving the connection speed. The elastic element continuously provides locking force, causing the locking pin to engage in the pin hole, effectively preventing loosening and disengagement caused by vibration or impact, and ensuring a stable and reliable connection. This utility model integrates "quick connection" and "reliable locking" into one unit, making it convenient to operate and improving work efficiency.

[0013] Preferably, in the aforementioned rail trolley capable of quick connection and locking, the locking shaft has an axially oriented receiving groove inside, the elastic element is located within the receiving groove, and its two ends are respectively connected to the bottom of the receiving groove and the locking pin. By creating the receiving groove, a precise and enclosed guiding and receiving space is provided for the movement of the elastic element and the locking pin; this ensures that the elastic force of the elastic element is accurately and losslessly transmitted to the locking pin along the axial direction, avoiding jamming or wear caused by off-center loading, ensuring the reliability and consistency of the operation. At the same time, by embedding the elastic element inside the locking shaft, the entire locking mechanism has a simple appearance and compact structure, without occupying additional space.

[0014] Preferably, in the aforementioned rail trolley with quick-connect locking, the operating arm includes an integrally formed first link and a second link arranged in an L-shape. The first link is hinged to the first trolley body. The outer wall of the locking shaft has threads, and the locking shaft is fastened to the second link by a locking nut. This design, limiting the operating arm to an L-shape and securing the locking shaft with a threaded nut, achieves a dual optimization of "labor-saving operation" and "modular detachability." The threaded connection means the locking shaft becomes a standard module that can be quickly replaced. It can be replaced individually if damaged, reducing maintenance costs. Simultaneously, different specifications of locking shafts can be replaced according to different load requirements, enhancing the product's versatility and adaptability.

[0015] Preferably, in the aforementioned railcar capable of quick connection and locking, the connecting column has a mounting groove that fits against the side wall of the second connecting rod, and the pin hole is formed at the bottom of the mounting groove. The mounting groove on the connecting column, which fits against the operating arm, integrates the functions of "motion guidance" and "rigid support." The side wall of the groove effectively guides and limits the operating arm during the pressing process, ensuring that the endpoint of the locking pin's trajectory is precisely aligned with the pin hole. The surface contact between the operating arm and the groove wall transforms the locking force from point contact to surface contact, significantly improving the rigidity and bending / torsional resistance of the connection, resulting in a stronger overall integrity and more stable operation after the car body is connected.

[0016] Preferably, in the aforementioned rail trolley that can be quickly connected and locked, the elastic element is a compression spring. Using a compression spring is the most classic, reliable, and economical technical approach to achieve the elastic reset function.

[0017] Preferably, the aforementioned railcar with quick-connect and locking mechanism further includes an operating handle. The operating handle comprises a first rod fixed to the first vehicle body and a second rod hinged to the first rod. The first and second rods are unfolded and folded via a locking mechanism. Adding a foldable operating handle to the trolley significantly improves the portability and space utilization of the equipment; it also solves the problem of transporting and storing the equipment when it is not in operation. The folded trolley is smaller in size, making it easier to place in a vehicle trunk, stack for storage, or store beside narrow tracks, greatly expanding its application scenarios.

[0018] Preferably, in the aforementioned quick-connect and lockable track trolley, the locking part includes a U-shaped plate installed at the connection between the first rod and the second rod. The U-shaped plate has hinge holes, a first positioning hole, and a second positioning hole arranged in a right-angled triangle. The first rod and the second rod are hinged to the U-shaped plate via hinge shafts passing through the hinge holes. A connecting shaft passes through the second rod. When the operating handle is in the unfolded state, the connecting shaft is inserted into the first positioning hole; when the operating handle is in the folded state, the connecting shaft is inserted into the second positioning hole. The right-angled triangle layout of the three holes ensures a stable position in both the unfolded and folded states. After the connecting shaft is inserted into the hole, external force needs to be applied to change the state, avoiding accidental loosening. The user only needs to lift the pin, rotate the handle, and insert the pin to complete the state switching, making the operation simple and intuitive.

[0019] Preferably, in the aforementioned quick-connect and lockable track trolley, the connecting shaft is a pull-out pin, facilitating switching between the first positioning hole and the second positioning hole. The structure is simple and easy to operate.

[0020] Preferably, in the aforementioned quick-connect and lockable track trolley, a handle is fixed to the top of the second rod. The handle provides the operator with a comfortable and stable point of force application, which not only reduces fatigue when pushing and pulling the trolley, but also enhances the control accuracy of the trolley's direction, especially when under heavy load or on inclines and declines, thus improving safety.

[0021] Preferably, in the above-mentioned rail trolley that can be quickly connected and locked, both the bottom of the first trolley body and the bottom of the second trolley body are equipped with wheels.

[0022] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a track trolley that can be quickly connected and locked, which has the following beneficial effects:

[0023] 1. The operating arm of this utility model is hinged to the first vehicle body and detachably connected to the locking shaft. Combined with the elastic engagement structure of the locking pin and the pin hole on the connecting column, the connection and separation of the vehicle body becomes extremely simple. In time-sensitive scenarios such as logistics transportation and production line material handling, it can quickly respond to work requirements, rapidly complete the assembly and disassembly of the vehicle body, accelerate the loading, unloading, and transfer of goods and the progress of the production process, and significantly improve overall operational efficiency.

[0024] 2. The elastic element of this utility model ensures that the locking pin is always firmly engaged in the pin hole, preventing it from coming loose due to vibration or other factors during operation, thus guaranteeing the stability of the connection between the first and second car bodies. Even when the track trolley is running at high speed or carrying heavy loads, a tight connection can be ensured, preventing loosening and separation, and greatly improving operational safety. At the same time, the operating arm, locking shaft, locking pin, and connecting column work together to form an organic whole, effectively avoiding connection failures caused by the failure of a single component, and providing a solid guarantee for the stable operation of the track trolley.

[0025] 3. The quick-connect and locking design of this utility model allows for flexible combination of different numbers or types of vehicle bodies according to different work tasks and operating conditions. When transporting long goods, multiple vehicle bodies can be connected to increase the length; when transporting heavy goods, the weight can be distributed to improve load-bearing capacity. After the task is completed, the vehicle bodies can be easily separated for convenient storage and management. Moreover, during vehicle body maintenance, repair, or upgrades, the target vehicle body can be separated independently without affecting the use of other vehicle bodies, which is convenient for maintenance and facilitates timely improvement of overall performance, adapting to the needs of various working scenarios.

[0026] 4. The locking mechanism of this utility model features a compact and rational layout of its components, minimizing space occupation while fulfilling the connection and locking functions. This makes the overall structure of the rail trolley more compact, facilitating operation within limited rail space and reducing space occupation during storage and transportation, thus improving space utilization. Furthermore, this compact design allows the rail trolley to operate flexibly in confined working environments, such as between warehouse shelves or between factory equipment, enabling operators to smoothly complete connection and separation actions without spatial limitations, further expanding the application range of the rail trolley. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 The attached figure is an axonometric view of the track trolley that can be quickly connected and locked according to this utility model;

[0029] Figure 2 The attached image is... Figure 1 Enlarged view of section A in the attached figure;

[0030] Figure 3 The attached figure is a schematic diagram of the locking shaft structure provided by this utility model;

[0031] Figure 4 The attached image is... Figure 3 The attached sectional view;

[0032] Figure 5 The attached figure is an isometric view of the track trolley that can be quickly connected and locked according to this utility model from another angle;

[0033] Figure 6 The attached image is... Figure 5 Enlarged view of section B in the attached figure;

[0034] Figure 7 The attached figure is a schematic diagram of the unfolded operating armrest provided by this utility model;

[0035] Figure 8 The attached figure is a schematic diagram of the folded structure of the operating armrest provided by this utility model;

[0036] Figure 9 The attached figure is a front view of the track trolley that can be quickly connected and locked according to this utility model.

[0037] in:

[0038] 1-First vehicle body; 11-Power battery; 12-Indicator light; 2-Second vehicle body; 3-Operating arm; 31-First connecting rod; 32-Second connecting rod; 4-Locking shaft; 41-Accommodation groove; 42-Thread; 43-Nut; 5-Locking pin; 6-Elastic element; 7-Connecting column; 71-Pin hole; 72-Mounting groove; 8-Operating handle; 81-First rod body; 82-Second rod body; 83-Handle; 9-Locking part; 91-U-shaped plate; 911-Hinge hole; 912-First positioning hole; 913-Second positioning hole; 92-Hinge shaft; 93-Connecting shaft; 10-Walking wheel; 101-Power wheel; 102-Guide wheel. Detailed Implementation

[0039] 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.

[0040] See appendix Figure 1 To be continued Figure 9 This utility model discloses a track trolley that can be quickly connected and locked, including a first car body 1 and a second car body 2 that are docked. The first car body 1 and the second car body 2 are connected and locked together by a locking mechanism, and can be disassembled; the locking mechanism includes:

[0041] Operating arm 3, one end of which is hinged to the first vehicle body 1, and the other end is detachably connected to a locking shaft 4;

[0042] Locking pin 5 is axially slidably connected to the end of locking shaft 4;

[0043] The elastic element 6 is installed inside the locking shaft 4, and its two ends are respectively connected to the locking shaft 4 and the locking pin 5;

[0044] The connecting post 7 is fixed on the second vehicle body 2. The connecting post 7 has a pin hole 71 corresponding to the locking pin 5. Under the action of the elastic element 6, the locking pin 5 can be inserted into the pin hole 71 to realize the connection and locking of the first vehicle body 1 and the second vehicle body 2.

[0045] More specifically, the head of the locking pin 5 is hemispherical, and the entrance to the pin hole has a guide slope. This allows the locking pin 5 to engage more quickly within the pin hole.

[0046] In some specific examples, the locking shaft 4 has an axially oriented receiving groove 41 inside, the elastic element 6 is located in the receiving groove 41, and its two ends are respectively connected to the bottom of the receiving groove 41 and the locking pin 5.

[0047] In other embodiments, the operating arm 3 includes an integrally formed first link 31 and a second link 32 arranged in an L-shape. The first link 31 is hinged to the first vehicle body 1. The outer wall of the locking shaft 4 has a thread 42 and is threadedly connected to the second link 32. Figure 3 As shown, a nut 43 is threaded onto the outer side of the locking shaft 4. Tightening the nut generates a preload, firmly securing the locking shaft 4 to the second connecting rod 32 and preventing it from loosening or falling off during operation. When the locking pin 5 or the elastic element 6 wears or is damaged due to long-term use, maintenance personnel can loosen the nut 43 to remove the entire locking shaft 4 from the operating arm 3 for replacement or repair. After replacement, the nut 43 is tightened again to secure the locking shaft.

[0048] In a specific embodiment, the connecting column 7 has a mounting groove 72 that fits against the side wall of the second connecting rod 32, and the pin hole 71 is opened at the bottom of the mounting groove 72.

[0049] In a specific example, elastic element 6 is a compression spring.

[0050] In some examples, an operating armrest 8 is also included, which includes a first rod 81 fixed to the first vehicle body 1 and a second rod 82 hinged to the first rod 81. The first rod 81 and the second rod 82 are unfolded and folded by a locking part 9.

[0051] More specifically, the locking part 9 includes a U-shaped plate 91 installed at the connection between the first rod 81 and the second rod 82. The U-shaped plate 91 has hinge holes 911, a first positioning hole 912 and a second positioning hole 913 arranged in a right-angled triangle. The first rod 81 and the second rod 82 are hinged to the U-shaped plate 91 through a hinge shaft 92 passing through the hinge hole 911. The second rod 82 is provided with a connecting shaft 93. When the operating armrest 8 is in the unfolded state, the connecting shaft 93 is inserted into the first positioning hole 912; when the operating armrest 8 is in the folded state, the connecting shaft 93 is inserted into the second positioning hole 913.

[0052] In some specific examples, the connecting shaft 93 is a pull-out pin, which facilitates switching between the first positioning hole 912 and the second positioning hole 913.

[0053] In some other embodiments, a handle 83 is fixed to the top of the second rod 82.

[0054] In some examples, both the first vehicle body 1 and the second vehicle body 2 are equipped with wheels 10 at their bottoms.

[0055] In a specific example, the first vehicle body 1 has a power battery 11, which is preferably an industrial power lithium iron phosphate battery. It adopts a quick-connect installation method for easy replacement or charging. The power battery 11 provides power to the entire electrical system. The traveling wheels 10 include a power wheel 101 and a guide wheel 102. The power wheel has a braking function, and the guide wheel is equipped with a mechanical brake to prevent slippage. The power of the power wheel is transmitted to the drive unit (not shown in the figure, usually integrated inside the power wheel 101 or connected through a transmission mechanism) through the circuit. The drive unit converts electrical energy into mechanical energy, thereby driving the power wheel 101 to rotate and providing forward or backward traction for the entire track trolley. The trolley speed adopts a stepless speed regulation control system, which can achieve three levels of adjustment, and is equipped with battery voltage and power display functions, so that the operator can monitor the equipment status in real time.

[0056] In other embodiments, indicator lights 12 are installed on the side of the first vehicle body 1 near the operating handle 8 and on the side of the second vehicle body 2 away from the docking with the first vehicle body 1; different colors of the indicator lights indicate the display function (green light when walking, red light when stopping).

[0057] More specifically, the upper surfaces of the first vehicle body 1 and the second vehicle body 2 are steel frame structures, and the surfaces are covered with continuous alkali-free glass fiber reinforced polyurethane rigid foam material boards (replacing traditional structural patterned boards or steel plates).

[0058] The embodiments of this utility model are as follows:

[0059] The working principle of the connection, travel and folding of the track trolley is as follows (in conjunction with...) Figures 1 to 9 ):

[0060] 1. Vehicle body connection and locking process:

[0061] When it is necessary to connect the first vehicle body 1 with the second vehicle body 2, the first vehicle body 1 and the second vehicle body 2 are first connected. The operator swings the operating arm 3 downward. The operating arm 3 rotates around its hinge point with the first vehicle body 1, thereby driving the locking shaft 4 and locking pin 5, which are fastened to the end of its second connecting rod 32, to move together toward the connecting post 7 on the second vehicle body 2.

[0062] As the operating arm 3 is pressed down, the head of the locking pin 5 first contacts the bottom of the mounting groove 72 on the connecting post 7 (see...). Figure 2 , Figure 6 Continue pressing down the operating arm 3. The force generated by the contact will overcome the elastic force of the elastic element 6 and push the locking pin 5 back into the receiving groove 41 of the locking shaft 4. At this time, the elastic element 6 (compression spring) is compressed. At the same time, the side wall of the mounting groove 72 plays an effective guiding and limiting role for the second connecting rod 32, ensuring that the locking pin 5 can be accurately aligned with the pin hole 71.

[0063] The moment the locking pin 5 moves to be fully aligned with the pin hole 71, the elastic force stored in the compressed elastic element 6 is released, driving the locking pin 5 to pop out quickly, so that its head reliably engages in the pin hole 71. At this time, the second link 32 of the operating arm 3 is usually fully seated in the mounting groove 72, forming a stable surface contact support. Thus, the first vehicle body 1 and the second vehicle body 2 are quickly and firmly connected and locked.

[0064] 2. Driving process:

[0065] After connection, the operator can unfold the operating handle 8 as a push rod; start the control system, the power battery 11 supplies power to the drive unit, the drive unit drives the power wheel 101 to rotate, thereby driving the entire train to travel on the track, and the guide wheel 102 ensures that the trolley runs smoothly along the track; the power wheel 101 has a built-in braking function, and the guide wheel 102 is equipped with a mechanical brake, together ensuring reliable braking and parking of the trolley.

[0066] 3. Vehicle body separation process:

[0067] When it is necessary to separate the first vehicle body 1 from the second vehicle body 2, the operator needs to lift the operating arm 3 upwards, causing it to rotate around the hinge point with the first vehicle body 1. As the operating arm 3 is lifted, the locking shaft 4 and the locking pin 5 move upwards together. During this process, the head (hemispherical) of the locking pin 5 is squeezed by the bottom of the mounting groove 72 on the connecting post 7 and retracts into the locking shaft 4, overcoming the elastic force of the elastic element 6. When the locking pin 5 is completely disengaged from the pin hole 71 (guide slope) of the connecting post 7, the locking state between the first vehicle body 1 and the second vehicle body 2 is released; after the locking mechanism is unlocked, the operator can easily separate the first vehicle body 1 and the second vehicle body 2. Since the vehicles are connected only by the locking mechanism, the separation process can be simple and quick.

[0068] 4. Handrail folding process:

[0069] When space-saving is required, the handrail 8 can be folded; the operator pulls out the connecting shaft 93 inserted into the first positioning hole 912, then rotates the second rod 82 90°, and when aligned with the second positioning hole 913 on the U-shaped plate 91, inserting the connecting shaft 93 will lock the handrail in the folded state (see...). Figure 8 When unfolded, repeat the above operation and insert the connecting shaft 93 into the first positioning hole 912; the three holes arranged in a right-angled triangle ensure stability in both states; the handle 83 provides a comfortable grip point for the operator.

[0070] It should be noted that the vehicle body connection and locking process, driving process, vehicle body separation process, and handrail folding process described in this utility model are all implementation processes that can be adjusted according to the actual situation, as long as they can achieve the connection, locking, driving, separation, and folding of the vehicle body, and are not limited to the above contents.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A track trolley capable of quick connection and locking, comprising a first trolley body (1) and a second trolley body (2) that are docked, and the first trolley body (1) and the second trolley body (2) are connected and locked by a locking mechanism, characterized in that, The locking mechanism includes: Operating arm (3), one end of which is hinged to the first vehicle body (1), and the other end is detachably connected to a locking shaft (4); Locking pin (5), which is axially slidably connected to the end of the locking shaft (4); An elastic element (6) is installed inside the locking shaft (4), and its two ends are respectively connected to the locking shaft (4) and the locking pin (5); A connecting post (7) is fixed on the second vehicle body (2). The connecting post (7) has a pin hole (71) corresponding to the locking pin (5). The locking pin (5) can be inserted into the pin hole (71) under the action of the elastic element (6) to realize the connection and locking of the first vehicle body (1) and the second vehicle body (2).

2. The track trolley capable of quick connection and locking according to claim 1, characterized in that, The locking shaft (4) has an axially oriented accommodating groove (41) inside, and the elastic element (6) is located in the accommodating groove (41), with its two ends connected to the bottom of the accommodating groove (41) and the locking pin (5) respectively.

3. The track trolley that can be quickly connected and locked according to claim 1, characterized in that, The operating arm (3) includes a first link (31) and a second link (32) integrally formed and arranged in an L-shape. The first link (31) is hinged to the first vehicle body (1). The outer wall of the locking shaft (4) has a thread (42) and is threaded to the second link (32).

4. A track trolley capable of quick connection and locking according to claim 3, characterized in that, The connecting column (7) has a mounting groove (72) that fits against the side wall of the second connecting rod (32), and the pin hole (71) is opened at the bottom of the mounting groove (72).

5. A track trolley capable of quick connection and locking according to claim 1, characterized in that, The elastic element (6) is a compression spring.

6. A track trolley capable of quick connection and locking according to claim 1, characterized in that, It also includes an operating armrest (8), which includes a first rod (81) fixed to the first vehicle body (1) and a second rod (82) hinged to the first rod (81). The first rod (81) and the second rod (82) are unfolded and folded by a locking part (9).

7. A track trolley capable of quick connection and locking according to claim 6, characterized in that, The locking part (9) includes a U-shaped plate (91) installed at the connection between the first rod (81) and the second rod (82). The U-shaped plate (91) has a hinge hole (911), a first positioning hole (912) and a second positioning hole (913) arranged in a right-angled triangle. The first rod (81) and the second rod (82) are hinged to the U-shaped plate (91) through a hinge shaft (92) passing through the hinge hole (911). The second rod (82) is provided with a connecting shaft (93). When the operating armrest (8) is in the unfolded state, the connecting shaft (93) is inserted into the first positioning hole (912); when the operating armrest (8) is in the folded state, the connecting shaft (93) is inserted into the second positioning hole (913).

8. A track trolley capable of quick connection and locking according to claim 7, characterized in that, The connecting shaft (93) is a pull-out pin, which facilitates switching between the first positioning hole (912) and the second positioning hole (913).

9. A track trolley capable of quick connection and locking according to claim 6, characterized in that, A handle (83) is fixed to the top of the second rod (82).

10. A track trolley capable of quick connection and locking according to claim 1, characterized in that, Both the first vehicle body (1) and the second vehicle body (2) are equipped with wheels (10) at their bottoms.

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