Gas cylinder trolley
By designing components such as folding mechanisms and protective mechanisms, the gas cylinder trolley solves the problems of large size and inflexible movement in existing technologies, enabling the trolley to be flexibly unfolded and folded, thus improving the safety and stability of gas cylinder transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY FIRST GROUP FIFTH ENGINEERING CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-05-26
AI Technical Summary
Existing gas cylinder trolleys have a fixed structure, are bulky, take up a lot of space, have poor mobility, and are difficult to adapt to narrow passages, thus affecting work efficiency.
A gas cylinder trolley was designed, which includes a folding mechanism, a protective mechanism, a braking component, and a buffer component. The trolley can be flexibly unfolded and folded through the cooperation of the rear support leg, the rotating seat and the connecting rod. The protective ring and the hook lock and fix the gas cylinder. The braking component controls the movement and the buffer component absorbs vibration.
It enables the trolley to be flexibly unfolded and folded, reducing the floor space occupied, effectively securing gas cylinders of different sizes, improving transportation safety and stability, and enhancing mobility and work efficiency.
Smart Images
Figure CN224277210U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of gas cylinder handling equipment, and in particular to a gas cylinder handcart. Background Technology
[0002] Gas cylinders are pressure vessels used to store and transport compressed, liquefied, or dissolved gases, and are widely used in industrial production, medical care, scientific research, and daily life. In industrial fields, such as welding and cutting operations, oxygen cylinders and acetylene cylinders provide the necessary gas support; in the medical field, oxygen cylinders are essential equipment in hospitals to ensure respiratory support for patients; scientific research experiments also often rely on gas cylinders to provide specific gaseous environments. The various gases stored inside play diverse and crucial roles due to their different properties.
[0003] At construction sites, gas cylinders need to be manually moved, which is time-consuming and labor-intensive as it's difficult to move them quickly from one location to another. Current technology uses handcarts to transport cylinders. The basic structure includes a frame, wheels, and handles. In use, the cylinder is placed in the frame and secured with clamps. The operator holds the handle and pushes the handcart to move the cylinder. However, this type of handcart has several drawbacks. Firstly, the fixed frame results in a large overall size, occupying significant space when not in use, making storage extremely inconvenient in space-constrained locations. Secondly, its mobility is poor; the wheels are not flexible enough, making turning difficult in narrow passages or complex environments, thus affecting work efficiency. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a gas cylinder trolley, which aims to improve the problem that the existing technology uses a fixed frame structure, has a large overall volume, and occupies a lot of space when not in use, making storage inconvenient.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gas cylinder trolley, comprising two crossbeams, the right ends of the two crossbeams being fixedly connected to the same support plate, a folding mechanism being provided between adjacent crossbeams, a brake assembly being provided at the bottom of the folding mechanism, front support legs being fixedly connected to the left side of the bottom ends of the two crossbeams, front wheels being rotatably connected to the opposite sides of the two front support legs, a protective mechanism being provided at the top of the two crossbeams, and a buffer assembly being provided at the top left side of the two crossbeams;
[0006] The folding mechanism includes multiple arc-shaped plates. The outer walls of the multiple arc-shaped plates are fixedly connected to the front and rear sides of the two crossbeams respectively. The bottom of the multiple arc-shaped plates is fixedly connected to the same reinforcing rod. The outer walls of the top arc-shaped plates are rotatably connected to a rear support leg. The outer right side of the rear support leg is fixedly connected to two rotating seats one. The outer left side of the two crossbeams is fixedly connected to two rotating seats two. The inner walls of the two rotating seats one are rotatably connected to connecting rod one. The inner walls of the two rotating seats two are rotatably connected to connecting rod two. The two connecting rods one are rotatably connected to the corresponding connecting rod two. A fixing component is provided between the adjacent connecting rods one and the corresponding connecting rod two.
[0007] Through the above technical solution: by rotating the rear support leg, since the rear support leg is rotatably connected to the top arc plate, it drives the top arc plate and multiple connected arc plates to move. The arc plate is connected to the crossbeam, so that the entire folding mechanism works in coordination with the crossbeam. The connecting rod 1 in the rotating seat 1 on the rear support leg rotates with it and drives the connecting rod 2 that is rotatably connected to it. The connecting rod 2 rotates in the rotating seat 2. When it rotates to the appropriate position, the fixing component plays its role, fixing the connecting rod 1 and the connecting rod 2, so that the rear support leg is stably supported and the unfolding is completed. At this time, the front support leg, the front wheel, the rear support leg and the brake component work together to realize the movement of the trolley. The brake component can control the braking. When folding, the fixing component is operated to release the fixation and the rear support leg is rotated in the opposite direction.
[0008] As a further description of the above technical solution:
[0009] The protective mechanism includes multiple fixed seats, the bottom ends of which are fixedly connected at equal intervals to the top left and right sides of the front crossbeam. Each of the multiple fixed seats has a protective ring rotatably connected to its top. Each of the multiple protective rings has a hook fixedly connected to its rear outer wall. Each of the rear crossbeams has multiple fasteners fixedly connected to its rear end left and right sides. Each of the multiple hooks engages with a corresponding rotating seat. Each of the multiple protective rings has a clamping component on its outer wall.
[0010] With the above technical solution: after the gas cylinder is placed on the support plate, the protective ring is rotated. Because the protective ring is rotatably connected to the front crossbeam through the fixed seat, it can rotate flexibly. After rotating into place, the hook on the rear side of the outer wall of the protective ring engages with the buckle at the rear end of the rear crossbeam, initially surrounding the gas cylinder between the protective ring and the arc plate to prevent the gas cylinder from falling. If further fixation is required, the clamping component is operated, and the hook engages with the rotating seat to enhance the overall stability, preparing for subsequent adjustment of the fixation degree according to the gas cylinder size.
[0011] As a further description of the above technical solution:
[0012] The fixing assembly includes two hollow tubes, the outer walls of which are respectively fixedly connected to the adjacent right ends of the two connecting rods one. Multiple springs are fixedly connected to the adjacent inner walls of the multiple hollow tubes. A locking block is fixedly connected to the adjacent end of each of the multiple springs. Two locking blocks are slidably connected to the corresponding springs. A reserved hole is opened at the left end of the adjacent side of each of the two connecting rods two. Two locking blocks are slidably connected to the corresponding reserved hole. An inclined groove is provided on the top left side of each of the multiple connecting rods two.
[0013] Through the above technical solution: when the rear outrigger rotates, it drives the first connecting rod to rotate, and the hollow tube connected to it also rotates synchronously, causing the locking block inside the hollow tube to move. After the locking block contacts the inclined groove on the second connecting rod, it slides down the inclined groove and compresses the spring. When the locking block rotates to align with the reserved hole, the spring rebounds and pushes the locking block into the reserved hole, thereby fixing the first connecting rod and the second connecting rod and stabilizing the position of the rear outrigger.
[0014] As a further description of the above technical solution:
[0015] The clamping assembly includes multiple lead screws, the outer wall of each lead screw is threaded to the middle of the inner wall of the corresponding protective ring, the top of each lead screw is fixedly connected to a rotating handle, and the bottom of each lead screw is rotatably connected to a clamping seat.
[0016] The above technical solution allows the operator to tighten the gas cylinder when needed. The top of the lead screw is fixedly connected to it, and the outer wall of the lead screw is threaded to the inner wall of the protective ring. The rotation of the handle causes the lead screw to move up and down within the protective ring, and the clamping seat connected to the bottom of the lead screw rises and falls accordingly. This tightly fits the gas cylinders of different sizes, achieving a firm fixation of the gas cylinders and preventing them from shaking during transportation.
[0017] As a further description of the above technical solution:
[0018] The brake assembly includes two mounting plates, the tops of which are fixedly connected to the bottoms of the corresponding rear outriggers. Each of the two mounting plates has a mounting plate 2 at its bottom, and the bottoms of the two mounting plates 2 are rotatably connected to the brake rear wheel. Each of the four corners of the top of the two mounting plates 2 is threaded with screws, and the tips of the screws are threaded to the corresponding mounting plates.
[0019] Through the above technical solution: when the brake assembly is working, mounting plate one connects the brake assembly to the rear support leg to ensure overall stability. Mounting plate two connects to the rear brake wheel at the bottom to realize the movement function of the handcart. When braking is required, the brake wheel braking device is operated to stop its rotation. The screw at the top corner of mounting plate two is threaded to mounting plate one to ensure that all components are tightly connected and do not loosen during braking and movement.
[0020] As a further description of the above technical solution:
[0021] The buffer assembly includes a mounting ring, the bottom of the outer wall of the mounting ring is threaded to the middle of the outer wall of the front crossbeam, the inner wall of the mounting ring is fixedly connected to a chain, and the middle of the outer wall of the rear crossbeam is fixedly connected to a fixing rod.
[0022] With the above technical solution: when the handcart moves, if it encounters vibration, the mounting ring is fixed to the front crossbeam by a threaded connection, and the chain connected to its inner wall will be displaced on the fixed rod fixed to the rear crossbeam. The chain absorbs the vibration energy by utilizing its own flexibility.
[0023] As a further description of the above technical solution:
[0024] Each of the two connecting rods has a mounting block fixedly connected to the top right side of its outer wall, and the same protective rod is fixedly connected to the left side of the outer wall of each of the two mounting blocks. Multiple protective sleeves are fixedly connected to the outer wall of the protective rod.
[0025] Through the above technical solution: when the rear outrigger is folded, the connecting rod drives the mounting block and the protective rod to rotate, and the protective rod touches the ground. Its outer protective sleeve cushions the impact and prevents the rear outrigger from being damaged by hard contact with the ground.
[0026] As a further description of the above technical solution:
[0027] Anti-slip sleeves are fixedly connected to the left ends of the outer walls of both beams, and multiple protrusions are fixedly connected to the outer walls of both anti-slip sleeves.
[0028] Through the above technical solution: when the operator holds the left end of the crossbeam, the anti-slip sleeve increases the friction, and the protrusions on its outer wall further increase the friction, preventing the hand from slipping and making it easier to push the handcart stably.
[0029] This utility model has the following beneficial effects:
[0030] 1. In this utility model, the trolley can be flexibly unfolded and folded by the cooperation of the rear support leg, rotating seat one, connecting rod one, connecting rod two and fixing components. When unfolded, the rear support leg rotates and drives the components to cooperate, so that the locking block slides into the reserved hole to fix the rear support leg, which is convenient for moving gas cylinders. When folded, the locking block is pushed out and the rear support leg is rotated, which effectively reduces the footprint of the trolley and greatly improves the situation of occupying a lot of storage space.
[0031] 2. In this utility model, after the protective ring rotates, the hook and buckle engage, initially wrapping the gas cylinder to prevent it from falling off. Rotating the handle drives the screw and clamping seat to move up and down, and the position can be adjusted according to the size of the gas cylinder to fit the gas cylinder tightly. Compared with the traditional method, this design can effectively fix gas cylinders of different sizes, avoid danger caused by shaking during transportation, and greatly improve the safety and stability of gas cylinder transportation. Attached Figure Description
[0032] Figure 1 This is a perspective view of the gas cylinder trolley proposed in this utility model;
[0033] Figure 2 This is a front view of the gas cylinder trolley proposed in this utility model;
[0034] Figure 3 This is a schematic diagram of the fixing components of the gas cylinder trolley proposed in this utility model;
[0035] Figure 4 This is a schematic diagram of the folding mechanism of the gas cylinder trolley proposed in this utility model;
[0036] Figure 5 for Figure 4 Enlarged view of point A in the middle;
[0037] Figure 6 This is a schematic diagram of the protective mechanism of the gas cylinder trolley proposed in this utility model;
[0038] Figure 7 This is a schematic diagram of the protective bar of the gas cylinder trolley proposed in this utility model.
[0039] Legend:
[0040] 1. Crossbeam; 2. Folding mechanism; 201. Arc plate; 202. Reinforcing rod; 203. Rear support leg; 204. Rotating seat one; 205. Rotating seat two; 206. Connecting rod one; 207. Connecting rod two; 208. Fixing assembly; 2081. Hollow tube; 2082. Spring; 2083. Locking block; 2084. Reserved hole; 2085. Inclined groove; 3. Protective mechanism; 301. Fixing seat; 302. Protective ring; 303. Hook; 304. Buckle 305. Clamping assembly; 3051. Lead screw; 3052. Rotating handle; 3053. Clamping seat; 4. Support plate; 5. Front outrigger; 6. Front wheel; 7. Brake assembly; 701. Mounting plate one; 702. Mounting plate two; 703. Brake rear wheel; 704. Screw; 8. Buffer assembly; 801. Mounting ring; 802. Chain; 803. Fixing rod; 9. Mounting block; 10. Protective rod; 11. Protective sleeve; 12. Anti-slip sleeve; 13. Protrusion. Detailed Implementation
[0041] 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.
[0042] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a gas cylinder trolley, comprising two crossbeams 1, providing a base for the installation and support of other components. The right ends of the two crossbeams 1 are fixedly connected to the same support plate 4, providing a platform for the gas cylinder. A folding mechanism 2 is provided between adjacent crossbeams 1, enabling the trolley to fold and effectively reduce its floor space when not in use. A brake assembly 7 is provided at the bottom of the folding mechanism 2 to control the braking of the trolley, ensuring stability when parked or when movement needs to be stopped. Front support legs 5 are fixedly connected to the left side of the bottom ends of both crossbeams 1, providing support for the front end of the trolley and ensuring stability during movement. Both front support legs 5 are rotatably connected to front wheels 6 on opposite sides, allowing the trolley to move flexibly and facilitating changes in its direction of movement by the operator. Protective mechanisms 3 are installed on the top of the two crossbeams 1, and buffer components 8 are installed on the top left side of the two crossbeams 1 to cushion vibrations caused by road bumps during transport, protecting the gas cylinder from damage. The folding mechanism 2 includes multiple arc-shaped plates 201, enhancing its structural strength and providing connection points for components such as the rear support legs 203. The outer walls of the multiple arc-shaped plates 201 are fixedly connected to the two crossbeams 1 on their front and rear sides, respectively. On one side of beam 1, the bottom of multiple curved plates 201 are fixedly connected to the same reinforcing rod 202, further enhancing the strength of the bottom of the folding mechanism 2, making it more stable when supporting the trolley and bearing the weight of the gas cylinder. The front and rear sides of the outer wall of the top curved plate 201 are rotatably connected to the same rear support leg 203, realizing the foldable function of the trolley. When unfolded, the rear support leg 203 provides support for the rear end of the trolley, and when folded, it reduces the volume of the trolley. Two rotating seats 204 are fixedly connected to the middle of the right side of the outer wall of the rear support leg 203. The rotating seats 204 provide support for the connecting rod 206. The rotating connection point allows the rear outrigger 203 to drive the connecting rod 206 to move synchronously during rotation. Two rotating seats 205 are fixedly connected to the middle left side of the outer walls of the two crossbeams 1, providing rotating connection points for the connecting rod 207, ensuring that the connecting rod 207 can rotate relative to the crossbeam 1. The inner walls of both rotating seats 204 are rotatably connected to the connecting rod 206. The connecting rod 206 rotates within the rotating seats 204, transmitting the rotational motion of the rear outrigger 203 to the connecting rod 207. The inner walls of both rotating seats 205 are rotatably connected to the connecting rod 206. 07. Connecting rod 207 rotates within rotating seat 205, cooperating with connecting rod 206 to achieve stable connection and support when the rear outrigger 203 rotates. The two connecting rods 206 are rotatably connected to their corresponding connecting rods 207, allowing them to move collaboratively during the rotation of the rear outrigger 203, ensuring smooth unfolding and folding of the rear outrigger 203. A fixing component 208 is provided between adjacent connecting rods 206 and their corresponding connecting rods 207 to fix the position of the rear outrigger 203 when needed.To ensure the trolley remains stable in its extended state and prevent accidental rotation of the rear support leg 203, the fixing assembly 208 includes two hollow tubes 2081, providing installation space for the spring 2082 and the locking block 2083. Structurally, it connects the connecting rod 206 and other components of the fixing assembly 208. The outer walls of the two hollow tubes 2081 are respectively fixedly connected to adjacent right ends of the two connecting rods 206, securely connecting the hollow tubes 2081 to the connecting rods 206, allowing the hollow tubes 2081 to... As the connecting rod 206 rotates, multiple springs 2082 are fixedly connected to adjacent sides of the inner walls of the multiple hollow tubes 2081, providing elastic force to the locking block 2083, allowing it to extend and retract within the hollow tubes 2081, thus enabling the locking block 2083 to engage and disengage with the pre-drilled hole 2084. Each adjacent end of the multiple springs 2082 is fixedly connected to a locking block 2083, which, under the action of the springs 2082, engages with the pre-drilled hole 2084 on the connecting rod 207, thereby securing the connecting rod. The relative positions of connecting rod 1 206 and connecting rod 207 are determined to fix the rear support leg 203. Two locking blocks 2083 are slidably connected to corresponding springs 2082, ensuring that the locking blocks 2083 can smoothly extend and retract within the hollow tube 2081 under the action of the springs 2082. Pre-drilled holes 2084 are provided on the left ends of adjacent sides of each of the two connecting rods 207. When the locking blocks 2083 enter the pre-drilled holes 2084 under the push of the springs 2082, they achieve the connection between connecting rod 1 206 and connecting rod 207. The relative positions of the connecting rod 207 are fixed, and the two locking blocks 2083 are slidably connected to the corresponding reserved holes 2084, ensuring that the locking blocks 2083 can smoothly enter and exit the reserved holes 2084, thereby fixing and unlocking the rear support leg 203. Each of the top left side of the multiple connecting rods 207 is provided with a sloping groove 2085 to guide the locking blocks 2083 to smoothly transition to contact with the connecting rod 207 and compress the spring 2082 during rotation, facilitating accurate entry of the locking blocks 2083 into the reserved holes 2084.
[0043] Specifically, the various components of the gas cylinder trolley work closely together to achieve its function. Two crossbeams 1 form the main frame, and a support plate 4 fixed at the right end is used to place the gas cylinders. The folding mechanism 2 between the crossbeams 1 solves the problems of large size and inconvenient storage. Multiple curved plates 201 and bottom reinforcing rods 202 enhance structural stability. The rear support leg 203, rotatably connected to the top curved plate 201, provides support. The rear support leg 203 is connected to the connecting rod 206 via a rotating seat 204. The crossbeams 1 are connected to the connecting rod 207 via a rotating seat 205, and the connecting rod 206 and connecting rod 207 are rotatably connected, allowing for flexible rotation of the rear support leg 203. The fixing component 208 is used to fix the position of the rear outrigger 203. The locking block 2083 connected to the spring 2082 inside the hollow tube 2081 cooperates with the reserved hole 2084 and the inclined groove 2085 on the connecting rod 207. When the rear outrigger 203 is rotated, the locking block 2083 slides into the reserved hole 2084 through the inclined groove 2085 to achieve fixation. The brake component 7 at the bottom of the folding mechanism 2 can control the handcart brake. The front outrigger 5 on the left side of the bottom end of the crossbeam 1 and the rotatably connected front wheel 6, together with the rear outrigger 203, realize the movement of the handcart. The protective mechanism 3 at the top of the crossbeam 1 and the buffer component 8 on the left side are used to fix the gas cylinder and buffer vibration, respectively, to ensure the safety of gas cylinder transportation.
[0044] Reference Figure 1 , Figure 2 and Figure 6The protective mechanism 3 includes multiple fixed seats 301, which provide installation bases and support points for the protective ring 302, allowing the protective ring 302 to be stably mounted on the front crossbeam 1. The bottom ends of the multiple fixed seats 301 are equidistantly fixed to the top left and right sides of the front crossbeam 1. The top of each of the multiple fixed seats 301 is rotatably connected to the protective ring 302. Through the rotatable connection with the fixed seats 301, the ring 302 can be flexibly rotated, facilitating the adjustment of its position before and after placing the gas cylinder, thereby achieving the surrounding protection of the gas cylinder. The rear side of the outer wall of each of the multiple protective rings 302 is fixedly connected to hooks 303, which are used to cooperate with the latches 304 on the rear crossbeam 1 to connect the protective ring 302 to the rear crossbeam 1, thereby surrounding the gas cylinder within a certain space and preventing it from falling. The rear left and right sides of the rear end of the outer wall of the rear crossbeam 1 are fixedly connected to multiple latches 304, and the multiple hooks 303 are respectively connected to the... The corresponding rotating seat 204 engages with the gas cylinder. Each of the outer walls of multiple protective rings 302 is equipped with a clamping assembly 305, used to further tighten the gas cylinder according to its different dimensions, ensuring that the gas cylinder will not be dangerous due to shaking during transportation. The clamping assembly 305 includes multiple lead screws 3051, whose threaded structure engages with the inner wall of the protective ring 302 to achieve position adjustment. The middle portion of the outer wall of each lead screw 3051 is threadedly connected to the middle portion of the inner wall of the corresponding protective ring 302. Each lead screw 3051 has a rotating handle 3052 fixedly connected to its top, providing a force application point for the operator to drive the lead screw 3051 to rotate. Each lead screw 3051 has a clamping seat 3053 rotatably connected to its bottom end, which moves up and down via the lead screw 3051, tightly fitting the surface of the gas cylinder and achieving a secure fixation.
[0045] Specifically, multiple fixing seats 301 are equidistantly fixed to the top of the front crossbeam 1, providing rotational support for the protective ring 302, allowing the protective ring 302 to rotate flexibly. The hooks 303 on the rear side of the outer wall of the protective ring 302 engage with the latches 304 at the rear end of the rear crossbeam 1. When the protective ring 302 rotates to the rear, the two work together to initially surround and fix the gas cylinder, preventing it from tipping to the side. The clamping assembly 305 further adapts to different gas cylinder sizes and enhances the fixing effect. The screw 3051 is threaded to the inner wall of the protective ring 302. Rotating the rotating handle 3052 at the top allows the screw 3051 to move up and down. The clamping seat 3053, which is rotatably connected to the bottom of the screw 3051, rises and falls accordingly, thus tightly fitting the surface of gas cylinders of different diameters, preventing the gas cylinder from shaking during transportation, and comprehensively ensuring the stability and safety of the gas cylinder during transportation.
[0046] Reference Figure 1 , Figure 2 and Figure 5The brake assembly 7 includes two mounting plates 701. The tops of the two mounting plates 701 are fixedly connected to the bottoms of the corresponding rear support legs 203, serving as key components for connecting the brake assembly 7 to the rear support legs 203. These plates provide a mounting base for the brake assembly 7, ensuring a stable connection to the trolley's rear support legs 203. Each mounting plate 701 has a mounting plate 702 at its bottom, providing a mounting carrier for the brake rear wheel 703. This ensures the brake rear wheel 703 can rotate flexibly and effectively perform braking actions. The bottoms of both mounting plates 702 are rotatably connected to the brake rear wheel 703, which directly contacts the ground. Its braking device enables the trolley to brake, ensuring the trolley can stop stably when needed. Screws 704 are threaded onto the four corners of the top of each mounting plate 702. The mounting plate 704 is used to firmly connect the second mounting plate 702 and the first mounting plate 701, enhance the stability of the overall structure of the brake assembly 7, and prevent the components from loosening during use. The tops of the multiple screws 704 are respectively threaded to the corresponding first mounting plate 701. The buffer assembly 8 includes a mounting ring 801, which firmly installs the buffer assembly 8 on the front crossbeam 1 of the handcart. The bottom of the outer wall of the mounting ring 801 is threaded to the middle of the outer wall of the front crossbeam 1. The inner wall of the mounting ring 801 is fixedly connected to a chain 802, which has a certain degree of flexibility and adjustability and plays a key role in the buffering process. It can absorb vibration energy. The middle of the outer wall of the rear crossbeam 1 is fixedly connected to a fixing rod 803, which provides a support point for the chain 802, so that the chain 802 forms a specific structure between the two crossbeams 1 to achieve the buffering of vibration during the transportation of gas cylinders.
[0047] Specifically, two mounting plates 701 are fixed to the bottom of the rear support leg 203, providing a connection point between the brake assembly 7 and the main body of the handcart, ensuring the overall structural stability. Mounting plate 702 is located at the bottom of mounting plate 701, providing a mounting base for the brake rear wheel 703, allowing it to rotate flexibly and enabling the handcart to move. When braking is required, the braking device of the brake rear wheel 703 (not described in detail, but can be understood as a conventional braking structure) can be operated to stop the rotation of the brake rear wheel 703, thus preventing the handcart from moving. Screws 704 at the four corners of the top of mounting plate 702 are threaded to mounting plate 701, securing mounting plate 702 tightly to mounting plate 701. The components are tightly fixed together to ensure that the brake assembly 7 will not loosen due to vibration or other reasons during use, thus affecting the braking effect. The mounting ring 801 is threaded to the middle of the outer wall of the front crossbeam 1 through the bottom of its outer wall, fixing the buffer assembly 8 to the handcart. The chain 802 fixed to the inner wall of the mounting ring 801 cooperates with the fixing rod 803 fixed to the middle of the outer wall of the rear crossbeam 1. When the handcart encounters vibration or collision during movement, the chain 802 will generate relative displacement on the fixing rod 803. The flexibility and adjustability of the chain 802 can absorb some of the vibration energy, providing cushioning protection for the gas cylinder placed on the handcart, preventing damage to the gas cylinder due to vibration or collision, and ensuring the safety of the gas cylinder during transportation.
[0048] Reference Figure 1 , Figure 4 and Figure 7 Mounting blocks 9 are fixedly connected to the top right side of the outer walls of both connecting rods 206, serving to connect the protective rod 10 to the connecting rods 206, allowing the protective rod 10 to be securely installed on the corresponding structure of the handcart. The same protective rod 10 is fixedly connected to the left side of the outer walls of the two mounting blocks 9, playing a crucial role when the rear support leg 203 of the handcart is folded. When the handcart is in the folded position, the protective rod 10 touches the ground, preventing the rear support leg 203 from directly contacting the ground and causing wear or damage. Multiple mounting blocks 9 are fixedly connected to the outer walls of the protective rod 10. Each protective sleeve 11 cushions the impact force generated when the protective rod 10 contacts the ground, protecting not only the protective rod 10 itself but also preventing damage to the placement surface. Anti-slip sleeves 12 are fixedly connected to the left ends of the outer walls of both crossbeams 1, increasing the grip friction when the operator pushes the handcart, allowing the operator to grip the crossbeams 1 more stably. Multiple protrusions 13 are fixedly connected around the outer walls of both anti-slip sleeves 12, further increasing the surface roughness of the anti-slip sleeves 12, thereby significantly increasing the friction between the operator's hand and the anti-slip sleeves 12.
[0049] Specifically, the mounting blocks 9 on the two connecting rods 206 connect to the protective rod 10, making the protective rod 10 stable in the handcart structure. When the rear support leg 203 is folded, the protective rod 10 touches the ground. The protective sleeve 11 on its outer wall is soft and elastic. When the protective rod 10 contacts the ground, it cushions the impact through its own deformation, protecting the protective rod 10 from being damaged and preventing damage to the ground. It also provides anti-slip and stable placement. The anti-slip sleeve 12 on the left end of the crossbeam 1 increases the friction, and the protrusions 13 on its outer wall further increase the surface roughness. When the operator holds the crossbeam 1 and pushes the handcart, the friction between the hand and the anti-slip sleeve 12 increases, preventing the hand from slipping and facilitating stable pushing of the handcart.
[0050] Working Principle: During use, first, the outrigger 203 is rotated to the left. Since the outrigger 203 is connected to the connecting rod 206 via the rotating seat 204, and the connecting rod 206 is rotatably connected to the connecting rod 207, rotating the outrigger 203 causes the connecting rod 206 to rotate synchronously with the connecting rod 207. During this process, the connecting rod 206 drives the connected hollow tube 2081 to rotate, and the locking block 2083 inside the hollow tube 2081 moves accordingly. When the locking block 2083 contacts the inclined groove 2085 on the connecting rod 207, the special shape of the inclined groove 2085 allows the locking block 2083 to smoothly transition and contact the connecting rod 207. At this time, the connecting rod 207 presses the locking block 2083, which in turn presses the spring 2082, causing the spring 2082 to compress into the hollow tube 2081. As the outrigger 203 continues to rotate... As the rotation continues, when the locking block 2083 rotates to align with the reserved hole 2084 on the connecting rod 207, the compressed spring 2082 releases its elasticity, pushing the locking block 2083 into the reserved hole 2084. At this point, the positions of the connecting rod 1 206 and the connecting rod 207 are fixed, and the rear support leg 203 is also stabilized. The trolley is now fully unfolded. At this time, the gas cylinder can be placed on the support plate 4, and the operator can push the left end of the crossbeam 1. With the help of the front wheel 6 and the brake rear wheel 703 at the bottom of the rear support leg 203, the trolley can be easily moved. When it is necessary to fold the trolley to reduce storage space, simply push the locking block 2083 out of the reserved hole 2084 to release the restriction between the connecting rod 1 206 and the connecting rod 207. Then, rotate the rear support leg 203 to the right to complete the folding operation, effectively reducing the footprint of the trolley and solving the problem of inconvenient storage in the prior art.
[0051] After placing the gas cylinder, rotate the protective ring 302 backward. Since the protective ring 302 is rotatably connected to the top of the front crossbeam 1 via the fixing seat 301, it can rotate easily. The hooks 303 on the rear side of the outer wall of the multiple protective rings 302 engage with the latches 304 on the left and right sides of the rear end of the outer wall of the rear crossbeam 1 after the protective ring 302 is rotated into place. At this time, the gas cylinder is initially wrapped between the arc plate 201 and the protective ring 302, forming the first layer of protection to prevent the gas cylinder from falling. Next, for gas cylinders of different sizes, the tightness of the fixation needs to be further adjusted. By rotating the handle 3052 at the top of the lead screw 3051, since the middle part of the outer wall of the lead screw 3051 is threaded to the middle part of the inner wall of the corresponding protective ring 302, rotating the handle 3052 will cause the lead screw 3051 to move up and down within the protective ring 302. The pressure seat 3053 rotatably connected to the bottom end of the lead screw 3051 will move up and down accordingly. Thus, the position of the pressure seat 3053 can be adjusted according to the actual size of the gas cylinder, so that it fits tightly against the gas cylinder, ensuring that the gas cylinder will not be dangerous due to shaking during transportation, and achieving effective fixation of gas cylinders of different sizes.
[0052] 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 gas cylinder trolley comprising two cross beams (1), characterised in that: The right ends of the two crossbeams (1) are fixedly connected to the same support plate (4), and a folding mechanism (2) is provided between the two crossbeams (1). A brake assembly (7) is provided at the bottom of the folding mechanism (2). Front support legs (5) are fixedly connected to the left side of the bottom end of the two crossbeams (1). Front wheels (6) are rotatably connected to the opposite side of the two front support legs (5). A protective mechanism (3) is provided at the top of the two crossbeams (1). A buffer assembly (8) is provided on the left side of the top of the two crossbeams (1). The folding mechanism (2) includes multiple arc-shaped plates (201). The outer walls of the multiple arc-shaped plates (201) are fixedly connected to the front and rear sides of the two crossbeams (1) respectively. The bottom of the multiple arc-shaped plates (201) is fixedly connected to the same reinforcing rod (202). The outer walls of the top arc-shaped plates (201) are rotatably connected to the same rear support leg (203). The right side of the outer wall of the rear support leg (203) is fixedly connected to two rotating seats (204). The two crossbeams (1) Two rotating seats (205) are fixedly connected to the middle of the left side of the outer wall. The inner walls of the two rotating seats (204) are rotatably connected to connecting rods (206). The inner walls of the two rotating seats (205) are rotatably connected to connecting rods (207). The two connecting rods (206) are rotatably connected to the corresponding connecting rods (207). A fixing component (208) is provided between the two connecting rods (206) and the corresponding connecting rods (207).
2. The cylinder trolley of claim 1, wherein: The protective mechanism (3) includes multiple fixed seats (301), the bottom ends of the multiple fixed seats (301) are fixedly connected at equal intervals to the top left and right sides of the front crossbeam (1), the top of the multiple fixed seats (301) is rotatably connected to a protective ring (302), the rear side of the outer wall of the multiple protective rings (302) is fixedly connected to a hook (303), the rear side of the rear end of the outer wall of the rear crossbeam (1) is fixedly connected to multiple buckles (304), the multiple hooks (303) are respectively engaged with the corresponding rotating seat (204), and the outer wall of the multiple protective rings (302) is provided with a pressing component (305).
3. The cylinder trolley of claim 1, wherein: The fixing component (208) includes two hollow tubes (2081). The outer walls of the two hollow tubes (2081) are respectively fixedly connected to the adjacent right ends of the two connecting rods (206). Multiple springs (2082) are fixedly connected to the adjacent inner walls of the multiple hollow tubes (2081). A locking block (2083) is fixedly connected to the adjacent end of the multiple springs (2082). The two locking blocks (2083) are slidably connected to the corresponding springs (2082). A reserved hole (2084) is opened at the left end of the adjacent side of the two connecting rods (207). The two locking blocks (2083) are slidably connected to the corresponding reserved hole (2084). An inclined groove (2085) is provided on the top left side of the multiple connecting rods (207).
4. The gas cylinder trolley according to claim 2, characterized in that: The clamping assembly (305) includes a plurality of lead screws (3051), the middle portion of the outer wall of the plurality of lead screws (3051) is threaded to the middle portion of the inner wall of the corresponding protective ring (302), the top end of the plurality of lead screws (3051) is fixedly connected to a rotating handle (3052), and the bottom end of the plurality of lead screws (3051) is rotatably connected to a clamping seat (3053).
5. The gas cylinder trolley according to claim 1, characterized in that: The brake assembly (7) includes two mounting plates (701), the tops of which are fixedly connected to the bottoms of the corresponding rear outriggers (203). The bottoms of the two mounting plates (701) are provided with mounting plates (702), and the bottoms of the two mounting plates (702) are rotatably connected to the brake rear wheel (703). The four corners of the tops of the two mounting plates (702) are threaded with screws (704), and the tops of the screws (704) are threaded to the corresponding mounting plates (701).
6. The gas cylinder trolley according to claim 1, characterized in that: The buffer assembly (8) includes a mounting ring (801), the bottom of the outer wall of the mounting ring (801) is threaded to the middle of the outer wall of the front crossbeam (1), the inner wall of the mounting ring (801) is fixedly connected to a chain (802), and the middle of the outer wall of the rear crossbeam (1) is fixedly connected to a fixing rod (803).
7. The gas cylinder trolley according to claim 1, characterized in that: The top right side of the outer wall of each of the two connecting rods (206) is fixedly connected to an installation block (9), and the left side of the outer wall of the two installation blocks (9) is fixedly connected to the same protective rod (10). The outer wall of the protective rod (10) is fixedly connected to multiple protective sleeves (11).
8. The gas cylinder trolley according to claim 1, characterized in that: Anti-slip sleeves (12) are fixedly connected to the left end of the outer wall of both beams (1), and multiple protrusions (13) are fixedly connected to the outer walls of both anti-slip sleeves (12).