Safety flat car applied to rail transit and having dual-braking function

Abstract

The utility model discloses a safety flat car with a dual braking function applied to rail transit, which comprises a car body, a pair of front wheels and a pair of rear wheels with trundle brake pads, a hand push rod is arranged on the car body, a pair of braking plates are arranged on two sides of a pair of steel rails, and the braking plates are horizontally and slidably connected with the car body; one end of each elastic piece is connected with the vehicle body, the other end of each elastic piece is connected with the brake plate, when the elastic pieces are in a compressed state, the brake plates abut against the corresponding steel rails, and when the elastic pieces are in a natural state, the brake plates are far away from the corresponding steel rails; the pair of tensioning lines corresponds to the pair of brake plates, and one end of each tensioning line is connected with the corresponding brake plate; and a guide operation part. The utility model has the beneficial effects of simple structure, reasonable design, convenience in use and high safety coefficient, and the possibility that the flat car slips to the tail and collides with other constructors is avoided from the source.

Description

Technical Field

[0001] The utility model relates to the field of safe construction in the track area of rail transit. More specifically, the utility model relates to a safety flatbed truck with a dual braking function applied to rail transit. Background Art

[0002] During the construction in the track area of rail transit, generally, construction workers use a flatbed truck to push tools and equipment to be installed to work in the track area. However, due to the lack of corresponding safety protection measures for the flatbed truck, accidents such as the flatbed truck slipping its tail and hitting other construction workers often occur, posing great potential safety hazards. How to develop a safety flatbed truck with a dual braking function applied to rail transit under the prerequisite of having to use the flatbed truck for construction operations has become the key to solving these problems. Summary of the Utility Model

[0003] An object of the utility model is to solve at least the above problems and provide a safety flatbed truck with a dual braking function applied to rail transit, which has a simple structure, reasonable design, convenient use, and high safety factor, and can avoid the possibility of the flatbed truck slipping its tail and hitting other construction workers from the source.

[0004] To achieve these and other advantages in accordance with the present utility model, there is provided a safety flatbed truck with a dual braking function applied to rail transit, including a vehicle body, a pair of front wheels provided at the front end of the vehicle body along its length direction, a pair of rear wheels with caster brakes provided at the rear end of the vehicle body along its length direction, a hand push rod provided on the top of the vehicle body near the rear wheels, and further including:

[0005] A pair of opposite braking plates, which are provided on both sides of a pair of rails, and the braking plates are horizontally slidably connected to the vehicle body;

[0006] A pair of elastic members, which correspond to the pair of braking plates, one end of the elastic member is connected to the vehicle body and the other end is connected to the braking plate, so that when the elastic member is in a compressed state, the braking plate abuts against the corresponding rail, and when the elastic member is in a natural state, the braking plate is away from the corresponding rail;

[0007] A pair of tension lines, which correspond to the pair of braking plates, and one end of the tension line is connected to the corresponding braking plate;

[0008] A guiding operation part, which is provided on the vehicle body and connected to the ends of the pair of tension lines away from the braking plates, so that when the guiding operation part is operated to the first state, a pulling force is generated on the pair of tension lines, thereby compressing the elastic members, driving the pair of braking plates to slide and abut against the rails to form braking, and when the guiding operation part is operated to the second state, the pair of tension lines are driven by the elastic members to rebound, driving the pair of braking plates away from the rails to release the braking.

[0009] Preferably, a pair of U-shaped plates are provided at the bottom of the vehicle body. An installation rod is connected between the two plates of the U-shaped plates facing the same direction. The pair of installation rods correspond to a pair of front wheels, and the front wheels are coaxially arranged on the installation rods.

[0010] A cylinder is horizontally provided on the side wall of the U-shaped plate away from the brake plate. A sliding plate is horizontally and slidably arranged in the cylinder. The elastic member is arranged between the sliding plate and the inner end wall of the cylinder away from the U-shaped plate; a support rod is provided on the side wall of the sliding plate away from the elastic member. The support rod is coaxial with the installation rod. The installation rod is hollow inside. The support rod sequentially slides through the side wall of the adjacent U-shaped plate, the installation rod, and the side wall of the other U-shaped plate and then is connected to the brake plate; one end of the tension line passes through the end wall of the cylinder away from the U-shaped plate and the elastic member and then is connected to the sliding plate. When the operation part is operated to pull the tension line, the sliding plate and the brake plate are driven to slide.

[0011] Preferably, a pair of guiding holes are provided on the vehicle body. The guiding holes are located on the side of the hand push rod away from the front wheels. The pair of guiding holes are respectively arranged at both ends of the vehicle body along its width direction. The guiding operation part includes:

[0012] A pair of guiding rings, which are arranged at the bottom of the vehicle body and between the pair of cylinders. The pair of guiding rings, the pair of tension lines, and the pair of guiding holes correspond one by one;

[0013] A pressing push rod, which is rotatably arranged on the hand push rod. The axial direction of the rotating shaft of the pressing push rod is consistent with the width direction of the vehicle body;

[0014] A rebounding member, which is connected to the pressing push rod;

[0015] Wherein, the end of the tension line away from the cylinder sequentially passes through the guiding ring and the guiding hole and then is connected to the pressing push rod. When an external force pushes the pressing push rod to rotate to a set angle, the rebounding member is in a compressed state and the elastic member is in a natural state, so as to push the pair of brake plates away from the rail. When the external force on the pressing push rod is removed, the rebounding member rebounds to drive the pressing push rod to return to its original position, thereby pulling the pair of tension lines, and finally pulling the pair of brake plates to abut against the rail to form braking.

[0016] Preferably, the brake plate is L-shaped, and the top of the horizontal plate body of the brake plate is adapted to the inclined bottom of the rail head.

[0017] Preferably, the hand push rod includes a pair of vertical rods respectively arranged at two ends in the width direction of the vehicle body, and an inclined U-shaped grip rod. The two ends of the grip rod in the same direction are the lower ends. The two lower ends of the grip rod are respectively connected to a pair of vertical rods near the top. The grip rod inclines towards the side of the vertical rod away from the front wheels. A rotating shaft with a torsion spring is arranged at the top of each vertical rod; the pressing push rod is a U-shaped rod, and the two ends of the pressing push rod in the same direction correspond to a pair of rotating shafts, and the two ends of the pressing push rod in the same direction are connected to the corresponding rotating shafts.

[0018] Preferably, the vehicle body includes a flat plate, a pair of first channel steels, a pair of second channel steels, and a pair of reinforcing channel steels. The pair of first channel steels are respectively arranged at two ends of the flat plate along its length direction, the pair of second channel steels are respectively arranged at two ends of the flat plate along its width direction, the pair of first channel steels and the pair of second channel steels enclose a square box adapted to the size of the bottom of the flat plate, the pair of reinforcing channel steels are arranged inside the square box, the reinforcing channel steels are arranged along the length direction of the flat plate, the two ends of the reinforcing channel steels are fixedly connected to the pair of first channel steels, and the pair of reinforcing channel steels are respectively arranged near the pair of second channel steels.

[0019] The utility model at least has the following beneficial effects:

[0020] By providing the vehicle body, front wheels, rear wheels, hand push rod, brake plate, elastic member, tension wire, and guiding operation part, a safety flatbed vehicle with a dual braking function applied to rail transit is provided. It has a simple structure, reasonable design, convenient use, high safety factor, and can avoid the possibility of the flatbed vehicle tail slipping and hitting other construction workers from the source.

[0021] Other advantages, objectives, and features of the utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view schematic diagram of the safety flatbed vehicle with a dual braking function applied to rail transit according to one technical solution of the utility model;

[0023] Figure 2 It is a side view schematic diagram of the connection structure of the vehicle body, a pair of front wheels, a pair of brake plates, and a pair of elastic members according to one technical solution of the utility model when the brake plate is away from the rail;

[0024] Figure 3 For Figure 2 The enlarged schematic diagram at A in

[0025] Figure 4 It is a side view schematic diagram of the connection structure of the vehicle body, a pair of front wheels, a pair of brake plates, and a pair of elastic members according to one technical solution of the utility model when the brake plate abuts against the rail;

[0026] Figure 5 The bottom view of the connection structure of the guide ring, guide hole and tension wire according to one of the technical solutions of the present utility model;

[0027] Figure 6 The three-dimensional structure schematic diagram of the vehicle body according to one of the technical solutions of the present utility model;

[0028] Figure 7 The top view of the structure of the guide operation part according to one of the technical solutions of the present utility model;

[0029] Figure 8 The front view of the connection structure between the guide operation part and the vehicle body according to one of the technical solutions of the present utility model (when the guide operation part is in the first state);

[0030] Figure 9 The front view of the connection structure between the guide operation part and the vehicle body according to one of the technical solutions of the present utility model (when the guide operation part is in the second state);

[0031] Figure 10 The side view of the connection structure between the guide pulley and the vehicle body according to one of the technical solutions of the present utility model;

[0032] Figure 11 The top view of the structures of the hand push rod and the connecting rod according to one of the technical solutions of the present utility model.

[0033] Reference numerals: 1 - vehicle body; 2 - hand push rod; 201 - vertical rod; 203 - grip rod; 3 - downward push rod; 4 - front wheel; 5 - rear wheel; 501 - brake pad; 6 - steel rail; 7 - C-shaped plate; 8 - tension wire; 9 - guide pulley; 10 - guide hole; 11 - brake plate; 12 - elastic member; 13 - sliding plate; 14 - cylinder; 15 - support rod; 16 - mounting rod; 17 - sliding rod; 18 - fixing plate; 19 - round rod; 20 - pushing block; 21 - vertical rod; 22 - connecting rod; 23 - guide ring; 24 - bracket. Detailed implementation manners

[0034] The following further describes the present utility model in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0035] It should be understood that terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0036] Such as Figures 1-11As shown in the figure, the utility model provides a safety flat car with a dual braking function applied to rail transit, which includes a car body 1, a pair of front wheels 4 arranged at the front end of the car body 1 along its length direction, and a pair of rear wheels 5 with caster brake pads 501 arranged at the rear end of the car body 1 along its length direction. A hand push rod 2 is arranged on the top of the car body 1 close to the rear wheels 5. It further includes:

[0037] A pair of opposite braking plates 11, which are arranged on both sides of a pair of rails 6, and the braking plates 11 are horizontally slidably connected to the car body 1;

[0038] A pair of elastic members 12, which correspond to the pair of braking plates 11. One end of the elastic member 12 is connected to the car body 1, and the other end is connected to the braking plate 11. When the elastic member 12 is in a compressed state, the braking plate 11 abuts against the corresponding rail 6. When the elastic member 12 is in a natural state, the braking plate 11 is away from the corresponding rail 6;

[0039] A pair of tension lines 8, which correspond to the pair of braking plates 11. One end of the tension line 8 is connected to the corresponding braking plate 11;

[0040] A guiding operation part, which is arranged on the car body 1 and is connected to the ends of the pair of tension lines 8 away from the braking plates 11. When the guiding operation part is operated to the first state, a pulling force is generated on the pair of tension lines 8, thereby compressing the elastic member 12 and driving the pair of braking plates 11 to slide and abut against the rails 6 to form braking. When the guiding operation part is operated to the second state, under the rebounding action of the elastic member 12, the pair of tension lines 8 drive the pair of braking plates 11 to be away from the rails 6 to release the braking;

[0041] In the above technical solution, the two ends of the car body 1 along its length direction are respectively the front end and the rear end. A pair of front wheels 4 are arranged at the bottom of the front end of the car body 1, and a pair of rear wheels 5 are arranged at the bottom of the rear end of the car body 1. The rear wheels 5 are caster structures with caster brake pads 501. This caster structure is an existing product and can be directly selected and used. A hand push rod 2 is arranged on the top of the car body 1 close to the rear wheels 5 to facilitate people to push the car body 1 to move. The front wheels 4 are connected to the bottom of the car body 1 through a mounting seat. The structure of the mounting seat is very mature and can be directly selected from existing structures. Or the structure of the mounting seat is as follows: The mounting seat includes a U-shaped plate. The middle plate body (the plate body connecting the two same-direction plate bodies) of the U-shaped plate extends outward to form a plate body structure similar to a π shape. An installation rod is connected between the two same-direction plate bodies of the U-shaped plate. The front wheels 4 are coaxially arranged on the installation rod to roll forward;

[0042] On both sides of a pair of rails 6, brake plates 11 are respectively provided. The brake plates 11 are vertically arranged and are slidably connected to the bottom of the vehicle body 1. The brake plates 11 slide in the horizontal direction. Horizontally arranged elastic members 12 are provided at the bottom of the vehicle body 1. The elastic members 12 can be springs. The arrangement of the elastic members 12 can be as follows: A support plate (not shown in the figure) is vertically provided at the bottom of the vehicle body 1. The support plate is located on one side of the front wheel 4 close to the other front wheel 4. The top of the brake plate 11 is slidably connected to the bottom of the vehicle body 1. The elastic member 12 is a spring. The spring is arranged between the front wheel 4 and the bottom of the vehicle body 1. One end of the spring is connected to the support plate, and the other end slides through the mounting seat (when the structure of the mounting seat is a C-shaped plate, it slides through the C-shaped plate) and then is connected to the brake plate 11. In this way, when the elastic member 12 is in the natural state, the pair of brake plates 11 do not contact the pair of rails 6, and the vehicle body 1 can move. When the elastic member 12 is in the compressed state, the elastic member pulls the pair of brake plates 11 to tightly abut against the rails 6 to form braking (similar to a pair of brake plates clamping a pair of rails 6).

[0043] A tension line 8 is connected to each brake plate 11. The tension line 8 is arranged at one end of the brake plate 11 close to the other brake plate 11. One end of the pair of tension lines 8 away from the brake plates 11 is connected to the guiding operation part. So when the guiding operation part is in the first state, it pulls the pair of tension lines 8, and then pulls the pair of brake plates 11 to slide towards the rails 6 until they abut against the rails 6 to form braking. When the guiding operation part is in the second state, there is no external force traction on the pair of tension lines 8. Under the action of the rebound of their respective elastic members 12, the pair of tension lines 8 drive the pair of brake plates 11 to move in the direction away from the rails 6, thereby releasing the braking effect.

[0044] The structure of the guiding operation part has various forms. Here is one example: Such as Figures 7-11As shown in the figure, the guiding operation part includes a pair of guiding pulleys 9, a pair of sliding rods 17, a fixing plate 18, a round rod 19, a pair of pushing blocks 20, a pair of vertical rods 21, and a connecting rod 22. More specifically: A pair of guiding pulleys 9 are arranged between a pair of front wheels 4. The guiding pulleys 9 are installed at the bottom of the vehicle body 1 through brackets 24. The axial direction of the guiding pulleys 9 is vertical. One end of the tension wire 8 is connected to the brake plate 11, and the other end slides through the guiding pulley 9, turns 90 degrees, and then winds out of the guiding pulley 9. A sliding rod 17 is provided at the winding-out end of each tension wire 8. The fixing plate 18 is arranged at the bottom of the vehicle body 1 and on the side where the rear wheels 5 are far from the front wheels 4. One end of the pair of sliding rods 17 far from the tension wire 8 slides horizontally out of the fixing plate 18. A round rod 19 is connected to the protruding ends of the pair of sliding rods 17 (pulling the round rod 19 can pull the pair of tension wires 8). The round rod 19 is horizontally arranged and along the width direction of the vehicle body 1. A pair of through holes are provided on the vehicle body 1. The through holes are located on the side of the fixing plate 18 far from the front wheels 4. A pushing block 20 slides on the through holes. A vertical rod 21 is provided at the top of the pushing block 20. A connecting rod 22 is connected to the pair of vertical rods 21. The connecting rod 22 is arranged along the width direction of the vehicle body 1. Among them, the bottom surface of the pushing block 20 is an inclined surface, and the high end of the inclined bottom surface of the pushing block 20 is far from the fixing plate 18. The inclined bottom surface of the pushing block 20 abuts against the round rod 19. When an external force presses down the connecting rod 22 to drive the pushing block 20 to move downward, the pushing block 20 pushes the round rod 19 and the sliding rod 17 to slide away from the front wheels 4, thereby pulling the pair of brake plates 11 to abut against the rail 6 to form braking (when the pushing block 20 is inserted between the round rod 19 and the fixing plate 18, the elastic member 12 is in a compressed state. At the same time, a soft pad such as a rubber pad is arranged on the surface of the brake plate 11 that abuts against the rail 6, which can not only protect the brake plate 11 but also provide a buffer space, facilitating the pushing block 20 to be inserted into the space between the round rod 19 and the fixing plate 18, so that a tight abutment is formed between the brake plate 11 and the rail 6); When the connecting rod 22 is manually lifted upward to lift the pushing block 20, the tension on the tension wire 8 disappears, resulting in the pair of brake plates moving away from the rail 6 under the elastic return of the elastic member 12, and the braking is released;

[0045] In this technical solution, during use, when the vehicle body 1 needs to be used, operate the guiding operation part to make it in the first state. At this time, the pair of tension wires 8 are under tension, compress the elastic member 12, and pull the pair of brake plates 11 to slide towards the rail 6 and then abut against the rail 6 to form braking; When the vehicle body 1 is not in use, operate the guiding operation part to make it in the second state. At this time, the pair of tension wires 8 are not under external force, the elastic member 12 changes from a compressed state to a natural state, and the pair of brake plates 11 slide away from the rail 6 under the elastic return of the elastic member 12, and then do not contact the rail 6 to release the braking;

[0046] With this technical solution, the beneficial effects are as follows. By providing the vehicle body 1, front wheels 4, rear wheels 5, hand push rod 2, brake plate 11, elastic member 12, and tension wire 8, a safety flatbed vehicle with a dual braking function applied to rail transit is provided. Its structure is simple, the design is reasonable, it is convenient to use, and the safety factor is high. It can avoid the possibility of the flatbed vehicle tail-sliding and hitting other construction workers from the source.

[0047] In another technical solution, a pair of C-shaped plates 7 are provided at the bottom of the vehicle body 1. An installation rod 16 is connected between the two plates of the C-shaped plate 7 in the same direction. The pair of installation rods 16 correspond to a pair of front wheels 4, and the front wheels 4 are coaxially inserted on the installation rod 16.

[0048] On the side wall of the C-shaped plate 7 away from the brake plate 11, a cylinder 14 is horizontally provided. A sliding plate 13 is horizontally and slidably arranged in the cylinder 14. The elastic member 12 is provided between the sliding plate 13 and the inner end wall of the cylinder 14 away from the C-shaped plate 7. A support rod 15 is provided on the side wall of the sliding plate 13 away from the elastic member 12. The support rod 15 is coaxial with the installation rod 16. The installation rod 16 is hollow inside. The support rod 15 sequentially slides through the side wall of the adjacent C-shaped plate 7, the installation rod 16, and the side wall of the other C-shaped plate 7 and then is connected to the brake plate 11. One end of the tension wire 8 passes through the end wall of the cylinder 14 away from the C-shaped plate 7 and the elastic member 12 and then is connected to the sliding plate 13. When the operation guiding operation part is operated to pull the tension wire 8, the sliding plate 13 and the brake plate 11 are driven to slide.

[0049] In this technical solution, a pair of C-shaped plates 7 are provided at the bottom of the vehicle body 1. The C-shaped plate 7 includes a pair of vertical plates and an intermediate plate connecting the pair of vertical plates. The intermediate plate is connected to the bottom of the vehicle body 1. A front wheel 4 installation space is formed between the pair of vertical plates. A horizontal installation rod 16 is connected between the pair of vertical plates, and the front wheel 4 is inserted on the installation rod 16.

[0050] A cylinder 14 is horizontally provided on the vertical plate of the C-shaped plate 7. The cylinder 14 is located on the side of the front wheel 4 close to the other front wheel 4. A sliding plate 13 is coaxially and slidably arranged in the cylinder 14. An elastic member 12 is provided between the sliding plate 13 and the cylinder 14, and the elastic member 12 is located on the side of the sliding plate 13 away from the front wheel 4. A support rod 15 is coaxially provided on the side wall of the pulley away from the elastic member 12. The support rod 15 is coaxial with the installation rod 16. The installation rod 16 is hollow inside so that the support rod 15 can slide through one vertical plate, the installation rod 16, and the other vertical plate and then be connected to the brake plate 11.

[0051] Adopting this technical solution, the beneficial effects obtained are as follows: By designing the C-shaped plate 7, the cylinder 14, and the slide plate 13, a way of connecting the elastic member 12 to the brake plate 11 is provided, and at the same time, the elastic member 12 is protected.

[0052] In another technical solution, a pair of guide holes 10 are provided on the vehicle body 1. The guide holes 10 are located on the side of the hand push rod 2 away from the front wheels 4. The pair of guide holes 10 are respectively arranged at both ends of the vehicle body 1 along its width direction. The guiding operation part includes:

[0053] A pair of guide rings 23, which are arranged at the bottom of the vehicle body 1 and between the pair of cylinders 14. The pair of guide rings 23, the pair of tension lines 8, and the pair of guide holes 10 correspond one by one;

[0054] A downward pressing push rod 3, which is rotatably arranged on the hand push rod 2. The axial direction of the rotation shaft of the downward pressing push rod 3 is the same as the width direction of the vehicle body 1;

[0055] A resilient member, which is connected to the downward pressing push rod 3;

[0056] Wherein, one end of the tension line 8 away from the cylinder 14 sequentially passes through the guide ring 23 and the guide hole 10 and then is connected to the downward pressing push rod 3. So that when an external force pushes the downward pressing push rod 3 to rotate to a set angle, the resilient member is in a compressed state, and the elastic member 12 is in a natural state and then pushes the pair of brake plates 11 away from the rail 6. When the external force on the downward pressing push rod 3 is removed, the resilient member rebounds to drive the downward pressing push rod 3 to return to its original position, and then pulls the pair of tension lines 8, and finally pulls the pair of brake plates 11 into contact with the rail 6 to form braking;

[0057] In the above technical solution, the downward pressing push rod 3 is rotatably arranged on the vehicle body 1. The downward pressing push rod 3 is arranged on the side of the hand push rod 2 close to the front wheels 4 and at a position convenient for human hands to operate (when a human hand holds the hand push rod 2, at this time, the downward pressing push rod 3 is at a position convenient for human hands to operate). The axial direction of the rotation shaft of the downward pressing push rod 3 is the same as the width direction of the vehicle body 1, so that the downward pressing push rod 3 can rotate towards the side of the hand push rod 2;

[0058] A pair of guide holes 10 are provided on the vehicle body 1. The pair of guide holes 10 are located at the rear end of the vehicle body 1 along its length direction. At the rear end of the vehicle body 1, the pair of guide holes 10 are respectively arranged at both ends of the vehicle body 1 along its width direction; The guide holes 10 are located on the side of the hand push rod 2 away from the front wheels 4;

[0059] A pair of guide rings 23 are provided at the bottom of the vehicle body 1. The pair of guide rings 23 are located between a pair of cylinders 14. The pair of guide rings 23, a pair of tension lines 8, and a pair of guide holes 10 correspond to each other one by one. The end of the tension line 8 away from the slide plate 13 passes through the corresponding guide ring 23 and guide hole 10 and then is connected to the pressing push rod 3. The connecting lines between the guide ring 23, the guide hole 10, and the cylinder 14 form a quasi-triangle. A resilient member (not shown in the figure) is provided on the pressing push rod 3. Specifically, the resilient member can be a torsion spring or a resilient spring. When the resilient member is a resilient spring, one end of the resilient spring can be connected to the hand push rod 2 or the vehicle body 1, and the other end can be connected to the pressing push rod 3 to provide a resilient force.

[0060] In the above technical solution, during use, in the initial state, the pressing push rod 3 is pressed so that the pressing push rod 3 rotates towards the hand push rod 2 until the pressing push rod 3 contacts the hand push rod 2 (which is convenient for a person to hold the hand push rod 2 and the pressing push rod 3 with both hands at the same time and can continuously apply force to the pressing push rod 3 during walking). At this time, the resilient member is in a compressed state, and the elastic member 12 is in a natural state and thus pushes a pair of brake plates 11 away from the rail 6, and the braking contact is formed. The operator can push the vehicle body 1 to walk. When the vehicle body 1 is not needed, the pressing push rod 3 is released. At this time, the resilient member rebounds to its original state. At the same time, under the action of the rebound of the resilient member, the pressing push rod 3 is driven back to its original position, thereby pulling a pair of tension lines 8, and finally pulling a pair of brake plates 11 to abut against the rail 6 to form braking.

[0061] Adopting this technical solution, the beneficial effects obtained are that by designing the guide ring 23, the guide hole 10, the pressing push rod 3, and the resilient member, a structure of a guiding operation part is provided. Its structure is simple, the design is reasonable, it is convenient to use, and the safety factor is high. It maintains a braking state when no external force is applied by personnel, avoiding the possibility of the flatbed truck slipping at the tail and hitting other construction workers from the source. At the same time, it is in a pushable state when the pressing push rod 3 is pressed, ensuring the normal use of the flatbed truck, and has strong practicability.

[0062] In another technical solution, the brake plate 11 is L-shaped, and the top of the horizontal plate body of the brake plate 11 is adapted to the inclined bottom of the rail head of the rail 6. Specifically, the brake plate 11 includes a vertical part and a horizontal part. The horizontal part is a horizontal plate body, and the top of the horizontal plate body is adapted to the inclined bottom of the rail head of the rail 6. When the brake plate 11 moves towards the rail 6, the end of the horizontal plate body closely abuts against the transition between the rail head of the rail 6 and the rail web of the rail 6 to form braking. Adopting this technical solution, the beneficial effects obtained are that by providing the L-shaped brake plate 11, a selection structure of the brake plate 11 is provided. At the same time, the L-shaped brake plate 11 can form guidance on the one hand and has a good braking effect on the other hand.

[0063] In another technical solution, the hand push rod 2 includes a pair of vertical rods 201 respectively arranged at two ends of the vehicle body 1 in the width direction, and an inclined U-shaped grip rod 203. The two ends of the grip rod 203 in the same direction are the lower ends. The two lower ends of the grip rod 203 are respectively connected to a pair of vertical rods 201 near the top ends. The grip rod 203 inclines towards the side of the vertical rods 201 away from the front wheels 4. A rotating shaft with a torsion spring is arranged at the top of each vertical rod 201; the pressing push rod 3 is a U-shaped rod. The two ends of the pressing push rod 3 in the same direction correspond to a pair of rotating shafts, and the two ends of the pressing push rod 3 in the same direction are connected to the corresponding rotating shafts;

[0064] In the above technical solution, the hand push rod 2 includes a pair of vertical rods 201 and a grip rod 203. The pair of vertical rods 201 are respectively arranged at two ends of the vehicle body 1 along its width direction. The vertical rods 201 are arranged at one end of the vehicle body 1 close to the rear wheels 5; the grip rod 203 is arranged on the side of the vertical rods 201 away from the front wheels 4. The grip rod 203 is U-shaped. The two ends of the grip rod 203 in the same direction face downwards, and the two ends of the grip rod 203 in the same direction are respectively connected to a pair of vertical rods 201 near the top ends, that is, there is still a certain distance from the connection of the vertical rods 201 to the top end, which is convenient for the subsequent operation and use of the pressing push rod 3; a rotating shaft with a torsion spring is arranged at the top of each vertical rod 201. The two ends of the pressing push rod 3 in the same direction correspond to a pair of rotating shafts, and the two ends of the pressing push rod 3 in the same direction are connected to the corresponding rotating shafts, that is, in this technical solution, the elastic member is a torsion spring;

[0065] In this technical solution, during use, the operator rotates the pressing push rod 3 towards the hand push rod 2 until both hands can hold the hand push rod 2 and the pressing push rod 3 at the same time. At the same time, a pair of brake plates 11 also move away from the rail 6, and the vehicle body 1 moves forward; when the vehicle body 1 is not in use, the pressing push rod 3 is released. The pressing push rod 3 returns to its original position under the action of the torsion spring, and finally pulls a pair of brake plates 11 to abut against the rail 6 to form braking; adopting this technical solution, the beneficial effect obtained is that by arranging the vertical rods 201, the grip rod 203, and the U-shaped rod, a structure of the hand push rod 2 and the pressing push rod 3 is provided, which is convenient for operation and use.

[0066] In another technical solution, the vehicle body 1 includes a flat plate, a pair of first channel steels, a pair of second channel steels, and a pair of reinforcing channel steels. The pair of first channel steels are respectively arranged at both ends of the flat plate along its length direction, and the pair of second channel steels are respectively arranged at both ends of the flat plate along its width direction. The pair of first channel steels and the pair of second channel steels enclose a square frame that is adapted to the size of the bottom of the flat plate. The pair of reinforcing channel steels are arranged inside the square frame. The reinforcing channel steels are arranged along the length direction of the flat plate, and both ends of the reinforcing channel steels are fixedly connected to the pair of first channel steels. The pair of reinforcing channel steels are respectively arranged near the pair of second channel steels; specifically, the first channel steel, the second channel steel, and the reinforcing channel steel are not shown in the figure. The flat plate is made of stainless steel material during actual use. The length direction of the flat plate is the length direction of the vehicle body 1. The first channel steel is arranged along the width direction of the flat plate, and the second channel steel and the reinforcing channel steel are both arranged along the length direction of the flat plate. The pair of first channel steels and the pair of second channel steels are connected and enclosed to form a square frame, and the size of the square frame is adapted to the size of the bottom of the flat plate to improve the support stability. The reinforcing channel steel is close to the corresponding second channel steel, and their bottom surfaces are located on the same horizontal plane, which can form an installation surface for installing the front wheels 4 and the rear wheels 5; adopting this technical solution, the beneficial effect obtained is that by designing the first channel steel, the second channel steel, the flat plate, and the reinforcing channel steel, it is convenient for on-site fabrication.

[0067] The number of devices and the processing scale described here are used to simplify the description of the present invention. The application, modification, and variation of the present invention to a safety flat car with a dual braking function in rail transit are obvious to those skilled in the art.

[0068] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

Claims

1. A safety flat car with dual braking functions applied to rail transit, comprising a car body, a pair of front wheels arranged at the front end of the car body along its length direction, and a pair of rear wheels with caster brake pads arranged at the rear end of the car body along its length direction. A hand push rod is provided at the top of the car body close to the rear wheels. It is characterized in that, Further included are: A pair of opposite brake plates disposed on both sides of a pair of steel rails, and the brake plates are horizontally slidably connected to the vehicle body; A pair of elastic members corresponding to the pair of brake plates, one end of the elastic member is connected to the vehicle body and the other end is connected to the brake plate, so that when the elastic member is in a compressed state, the brake plate abuts against the corresponding steel rail, and when the elastic member is in a natural state, the brake plate is away from the corresponding steel rail; A pair of tension lines corresponding to the pair of brake plates, and one end of the tension line is connected to the corresponding brake plate; A guiding operation part disposed on the vehicle body and connected to one ends of the pair of tension lines away from the brake plates, so that when the guiding operation part is operated to a first state, a pulling force is generated on the pair of tension lines, thereby compressing the elastic members and driving the pair of brake plates to slide to abut against the steel rails to form braking, and when the guiding operation part is operated to a second state, under the rebounding action of the elastic members, the pair of tension lines drive the pair of brake plates to move away from the steel rails to release the braking.

2. The safety flatbed vehicle with dual braking function applied to rail transit according to claim 1, characterized in that, A pair of U-shaped plates are provided at the bottom of the vehicle body, an installation rod is connected between two plates of the U-shaped plate in the same direction, the pair of installation rods correspond to a pair of front wheels, and the front wheels are coaxially arranged on the installation rods; A cylinder is horizontally provided on the side wall of the U-shaped plate away from the brake plate, a sliding plate is horizontally slidably arranged in the cylinder, and the elastic member is arranged between the sliding plate and the inner end wall of the cylinder away from the U-shaped plate; a support rod is provided on the side wall of the sliding plate away from the elastic member, the support rod is coaxial with the installation rod, the installation rod is hollow inside, and the support rod sequentially slides through the side wall of the adjacent U-shaped plate, the installation rod, and the side wall of the other U-shaped plate and then is connected to the brake plate; one end of the tension line passes through the end wall of the cylinder away from the U-shaped plate and the elastic member and then is connected to the sliding plate, so that when the operation part is operated to pull the tension line, the sliding plate and the brake plate are driven to slide.

3. The safety flatbed vehicle with dual braking function applied to rail transit according to claim 2, wherein, A pair of guiding holes are provided on the vehicle body, the guiding holes are located on the side of the hand push rod away from the front wheels, the pair of guiding holes are respectively arranged at both ends of the vehicle body along its width direction, and the guiding operation part includes: A pair of guiding rings disposed at the bottom of the vehicle body and located between the pair of cylinders, and the pair of guiding rings, the pair of tension lines, and the pair of guiding holes correspond one by one; A downward pressing push rod rotatably arranged on the hand push rod, and the axial direction of the rotation shaft of the downward pressing push rod is consistent with the width direction of the vehicle body; A rebounding member connected to the downward pressing push rod; Wherein, one end of the tension line away from the cylinder sequentially passes through the guiding ring and the guiding hole and then is connected to the downward pressing push rod, so that when an external force pushes the downward pressing push rod to rotate to a set angle, the rebounding member is in a compressed state, the elastic member is in a natural state and then pushes the pair of brake plates away from the steel rails, and when the external force on the downward pressing push rod is removed, the rebounding member rebounds to drive the downward pressing push rod to return to its original position, thereby pulling the pair of tension lines, and finally pulling the pair of brake plates to abut against the steel rails to form braking.

4. The safety flatbed vehicle with dual braking functions applied to rail transit according to claim 2, characterized in that, The brake plate is L-shaped, and the top of the horizontal plate body of the brake plate is adapted to the inclined bottom of the rail head of the steel rail.

5. The safety flatbed vehicle with dual braking functions applied to rail transit according to claim 3, characterized in that, The hand push rod includes a pair of vertical rods respectively arranged at two ends in the width direction of the vehicle body, and an inclined U-shaped grip rod. The two ends of the grip rod in the same direction are the lower ends. The two lower ends of the grip rod are respectively connected to a pair of vertical rods near the top. The grip rod inclines towards the side of the vertical rod away from the front wheels. A rotating shaft with a torsion spring is rotatably arranged at the top of each vertical rod; the pressing push rod is a U-shaped rod. The two ends of the pressing push rod in the same direction correspond to a pair of rotating shafts, and the two ends of the pressing push rod in the same direction are connected to the corresponding rotating shafts.

6. The safety flat car with dual braking function applied to rail transit according to claim 1, characterized in that, The vehicle body includes a flat plate, a pair of first channel steels, a pair of second channel steels, and a pair of reinforcing channel steels. The pair of first channel steels are respectively arranged at two ends of the flat plate along its length direction. The pair of second channel steels are respectively arranged at two ends of the flat plate along its width direction. The pair of first channel steels and the pair of second channel steels enclose a square frame that is adapted to the size of the bottom of the flat plate. The pair of reinforcing channel steels are arranged inside the square frame. The reinforcing channel steels are arranged along the length direction of the flat plate. The two ends of the reinforcing channel steels are fixedly connected to the pair of first channel steels. The pair of reinforcing channel steels are respectively arranged near the pair of second channel steels.

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