Fire trailer with steering device

Abstract

The present invention relates to the technical field of fire trailers, and more specifically, to a fire trailer with a steering device. The trailer comprises a frame, a device box for storing fire equipment is arranged on the top of the frame, and a control device is arranged on the bottom of the frame. In the present invention, when the motor vehicle drives the frame to turn and move, the connecting shaft head is driven to rotate in the turning direction, and the connecting shaft head drives the guide front axle to move through the second transmission member and the first transmission member of the transmission connection, and then drives the connecting body to deflect in the turning direction through the guide front axle, that is, the rear wheel deflects according to the corresponding angle of the turning direction of the frame, which can reduce the lateral friction between the tire and the ground, thereby protecting the tire from excessive wear of the tire.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting trailers, in particular to a fire-fighting trailer with a steering device. Background Art

[0002] A fire trailer is a vehicle towed by a car but without its own power drive device. A fire trailer is a special vehicle that is part of the firefighting equipment and is specifically used to respond to fires and other emergencies. The characteristic of this vehicle is that it can be mounted on other vehicles for operation, especially in areas with narrow and dense urban streets. This enables fire trailers to play an important role in complex environments that are difficult for traditional fire trucks to enter.

[0003] For example, CN204472888U relates to a steering device, including a chassis, a steering knuckle and a steering tie rod, wherein the steering knuckle includes a trapezoidal arm, and the steering knuckle is provided with two groups, and the two groups of steering knuckles are respectively installed at the two ends of the chassis, and also includes a steering control plate, and the steering control plate is swingably installed on the chassis; the steering tie rod is provided with two groups, and the two ends of each group of steering tie rods are respectively hinged on the trapezoidal arm of the steering knuckle and at different positions of the steering control plate. The utility model also discloses a fire trailer with the above-mentioned steering device. As described in the patent, when a motor vehicle tows a fire trailer for steering movement, since the fire trailer has no steering wheel and the axle has no differential, the tire with a smaller turning radius will have a more serious rubbing phenomenon, which will cause abnormal tire wear and greatly shorten the service life of the tire.

[0004] In order to reduce the wear on the tires of a fire-fighting trailer when the trailer is turned and moved, a fire-fighting trailer with a steering device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a fire-fighting trailer with a steering device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides a fire-fighting trailer with a steering device, comprising a frame, an equipment box for storing fire-fighting equipment is provided on the top of the frame, and a control device is provided at the bottom of the frame;

[0007] The frame includes a skeleton for supporting the equipment box and a traction cylinder arranged at one end of the skeleton;

[0008] The control device includes a traction component, a parking component and a guide front axle that are transmission-connected to the traction component. The traction component is located in the traction cylinder and is used to connect to the motor vehicle. The parking component is used to control the movement of the vehicle. The guide front axle is rotationally connected to the parking component and is used to control the steering of the vehicle. When the motor vehicle drives the traction component to turn, the traction component drives the parking component to a corresponding deflection angle through the guide front axle so as to reduce tire wear when the frame is turning.

[0009] As a further improvement of the technical solution, a rear cross beam is provided at one end of the skeleton away from the traction cylinder, and the parking assembly includes a parking rear axle and a movable structure arranged at the bottom of the rear cross beam, the movable structure includes a connecting body and a rear wheel arranged on the outside of the connecting body, the rear wheel is rotatably connected to the connecting body through a set wheel axle, the top of the connecting body is connected to the bottom of both ends of the rear cross beam, a brake drum plate for fitting with the surface of the wheel axle is provided in the connecting body, and the two ends of the parking rear axle are connected to the brake drum plate.

[0010] As a further improvement of the present technical solution, the traction assembly includes a first arm rotatably connected to the traction cylinder, a connecting shaft head that can move forward and backward is arranged in the first arm, the top end of the connecting shaft head passes through the outer wall of the first arm, a longitudinal beam is sleeved on the bottom of the connecting shaft head, the end of the longitudinal beam is slidably connected to the parking rear axle, and the outer walls at both ends of the parking rear axle are slidably connected to the inner wall of the bottom of the rear cross beam up and down.

[0011] As a further improvement of the technical solution, a beam groove penetrating the left and right surfaces is provided at the end of the longitudinal beam, and the beam groove is an arc-shaped groove. A beam shaft is correspondingly provided in the middle of the parking rear axle, and the beam shaft is slidably connected to the beam groove.

[0012] As a further improvement of the present technical solution, a second transmission member is provided in the longitudinal beam, a front cross beam is provided on the skeleton between the traction cylinder and the rear cross beam, a first transmission member is provided in the front cross beam, the second transmission member is transmission-connected to the connecting shaft head, the other end of the second transmission member is transmission-connected to the first transmission member, the bottom of the first transmission member is transmission-connected to the guide front axle, the two ends of the guide front axle are rotatably connected to the connecting body, and the top of the connecting body is rotatably connected to the bottom of the two ends of the rear cross beam.

[0013] As a further improvement of the technical solution, the bottom of the first arm is rotatably connected to a front wheel.

[0014] As a further improvement of the technical solution, a first gear is provided at the contact point between the surface of the connecting shaft head and the longitudinal beam, and the second transmission member is a gear set meshing with the first gear for transmitting the angle change of the connecting shaft head.

[0015] As a further improvement of the technical solution, a second arm is provided on one side of the connecting body close to the guide front bridge, and both ends of the guide front bridge are rotatably connected to the second arm.

[0016] As a further improvement of the technical solution, control arms are connected to the bottoms of both ends of the parking rear axle, control shafts are provided at the ends of the control arms, and the control shafts are rotationally connected to the brake drums.

[0017] As a further improvement of the technical solution, a reset spring is provided on the frame, and the frame is connected to the longitudinal beam via the reset spring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the fire trailer with a steering device, when the motor vehicle is connected to the towing assembly and drives the frame to move, the towing assembly drives the parking assembly to move downward. When the motor vehicle drives the towing assembly to turn, the towing assembly drives the parking assembly to a corresponding deflection angle by guiding the front axle so as to reduce tire wear when the frame is turning.

[0020] 2. In the fire trailer with a steering device, when the motor vehicle drives the frame forward or backward, the connecting shaft head will correspondingly drive the longitudinal beam forward or backward, so that the beam shaft can only move along the beam groove to a lower position to drive the parking rear axle to move down, and then drive the brake drum to separate from the wheel axle surface, thereby facilitating the motor vehicle to drive the frame forward or backward.

[0021] 3. In the fire trailer with a steering device, when the motor vehicle drives the frame to turn and move, the connecting shaft head is driven to rotate in the turning direction, and the connecting shaft head drives the guide front axle to move through the second transmission member and the first transmission member of the transmission connection, and then drives the connecting body to deflect in the turning direction through the guide front axle, that is, the rear wheel deflects according to the corresponding angle of the steering direction of the frame, which can reduce the lateral friction between the tire and the ground, thereby protecting the tire from excessive wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is the overall cross-sectional structure diagram of the present invention;

[0024] Figure 3 It is a cross-sectional structural diagram of the frame of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the control device of the present invention;

[0026] Figure 5 It is a cross-sectional structural diagram of the traction assembly of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the parking assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the parking rear axle structure of the present invention;

[0029] Figure 8 is a cross-sectional view of the mobile structure of the present invention;

[0030] Fig. 9 It is a schematic diagram of the guide front axle structure of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 1. Vehicle frame; 11. Frame; 111. Return spring; 12. Traction cylinder; 13. Rear cross beam; 14. Front cross beam; 141. First transmission member;

[0033] 2. Equipment box;

[0034] 3. Control device; 31. Traction assembly; 311. First arm; 312. Front wheel; 313. Connecting shaft head; 314. Longitudinal beam; 315. Beam groove; 316. Second transmission member; 32. Parking assembly; 321. Parking rear axle; 3211. Control arm; 3212. Beam shaft; 3213. Control shaft; 322. Moving structure; 3221. Connecting body; 3222. Rear wheel; 3223. Wheel axle; 3224. Brake drum; 3225. Second arm; 33. Guide front axle; 331. Guide groove. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 9 As shown, the purpose of this embodiment is to provide a fire-fighting trailer with a steering device, including a frame 1, an equipment box 2 for storing fire-fighting equipment is arranged on the top of the frame 1, and a control device 3 is arranged at the bottom of the frame 1;

[0037] The vehicle frame 1 includes a skeleton 11 for supporting the equipment box 2 and a traction cylinder 12 arranged at one end of the skeleton 11 .

[0038] The control device 3 includes a traction component 31, a parking component 32 and a guide front axle 33 which are transmission-connected to the traction component 31. The traction component 31 is located in the traction cylinder 12 and is used to connect to the motor vehicle. The parking component 32 is used to control the movement of the vehicle. The guide front axle 33 is rotationally connected to the parking component 32 and is used to control the steering of the vehicle. When the motor vehicle is connected to the traction component 31 and the frame 1 is driven to move by the traction component 31, the traction component 31 drives the parking component 32 to move downward. When the motor vehicle drives the traction component 31 to turn, the traction component 31 drives the parking component 32 to deflect to a corresponding angle through the guide front axle 33 so as to reduce tire wear when the frame 1 is turning.

[0039] The above structure is disclosed as follows:

[0040] First, when the motor vehicle is not connected to the traction assembly 31, and the frame 1 is not fixed or the frame 1 is on a slope, the frame 1 needs to be parked to prevent the frame 1 from slipping when the motor vehicle is connected to the traction assembly 31. The frame 11 is provided with an inverted "U"-shaped rear beam 13 at one end away from the traction cylinder 12. The parking assembly 32 includes a parking rear axle 321 arranged at the bottom of the rear beam 13. Both ends of the parking rear axle 321 are connected to a moving structure 322. The moving structure 322 includes a connecting body 3221 and a rear wheel 3222 arranged on the outside of the connecting body 3221. The wheel axle 3223 of the rear wheel 3222 is located on the connecting body 322. 1, the rear wheel 3222 is rotatably connected to the connecting body 3221 through the wheel axle 3223, the top of the connecting body 3221 is connected to the bottom of both ends of the rear cross beam 13, and a brake drum sheet 3224 for fitting with the surface of the wheel axle 3223 is provided in the connecting body 3221 below the wheel axle 3223, and both ends of the parking rear axle 321 are connected to the brake drum sheet 3224. Since the parking rear axle 321 controls the brake drum sheet 3224 to fit on the surface of the wheel axle 3223, the wheel axle 3223 is frictionally braked, so that the rear wheel 3222 cannot rotate to achieve the parking effect, which can prevent the frame 1 from slipping when the motor vehicle is connected to the traction component 31.

[0041] When the motor vehicle is connected to the traction assembly 31 by a latch or other means to drive the frame 1 to move, it is necessary to control the brake drum 3224 to disengage from the wheel axle 3223 so that the rear wheel 3222 can rotate to facilitate the movement of the frame 1. The traction assembly 31 includes a first arm 311 with a middle portion located in the traction cylinder 12. The middle portion of the first arm 311 is rotatably connected to the traction cylinder 12. A connecting shaft head 313 that can move forward and backward is provided in the first arm 311. The top end of the connecting shaft head 313 passes through the outer wall of the first arm 311, and a hole for connecting the latch is provided at the top end of the connecting shaft head 313. A longitudinal beam 314 is sleeved on the bottom of the connecting shaft head 313. The longitudinal beam 314 is located in the frame 11, and the end of the longitudinal beam 314 is slidably connected to the parking rear axle 321. The outer walls at both ends of the parking rear axle 321 are slidably connected to the inner wall at the bottom of the rear cross beam 13. When the motor vehicle is connected to the connecting shaft head 313 and tows the connecting shaft head 313, the connecting shaft head 313 is driven to move in the first arm 311 in the front and rear directions, thereby driving the longitudinal beam 314 to move forward and backward, so that the parking rear axle 321 slidably connected to the longitudinal beam 314 slides downward along the rear cross beam 13, driving the brake drum 3224 to separate downward from the wheel axle 3223, so that the rear wheel 3222 can rotate, so as to facilitate the motor vehicle towing the frame 1 to move.

[0042] The sliding connection method between the end of the longitudinal beam 314 and the parking rear axle 321 is specifically disclosed:

[0043] A beam groove 315 penetrating the left and right surfaces is provided at the end of the longitudinal beam 314, and the beam groove 315 is an arc-shaped groove. A beam shaft 3212 is correspondingly provided in the middle of the parking rear axle 321, and the beam shaft 3212 is located in the beam groove 315. The beam shaft 3212 is slidably connected with the beam groove 315. In the initial state, the beam shaft 3212 is located at the highest point in the beam groove 315. At this time, the brake drum 3224 is in contact with the wheel axle 3223, and the wheel axle 3223 cannot rotate. When the motor vehicle drives the frame 1 forward or backward, the connecting shaft head 313 will correspondingly drive the longitudinal beam 314 forward or backward, so that the beam shaft 3212 can only move along the beam groove 315 to a lower position to drive the parking rear axle 321 to move downward, thereby driving the brake drum 3224 to separate from the surface of the wheel axle 3223, thereby facilitating the motor vehicle to drive the frame 1 forward or backward.

[0044] When the motor vehicle drives the frame 1 to move, turning action is inevitable. In order to avoid excessive wear of the tires due to severe rubbing of the tires when turning, a second transmission member 316 is provided in the longitudinal beam 314, and the skeleton 11 is provided with a front cross beam 14 between the traction cylinder 12 and the rear cross beam 13. The front cross beam 14 is provided with a first transmission member 141. The second transmission member 316 is transmission-connected to the connecting shaft head 313, and the other end of the second transmission member 316 is transmission-connected to the first transmission member 141. The bottom of the first transmission member 141 is transmission-connected to the guide front axle 33, and the two ends of the guide front axle 33 are connected to the guide front axle 33. The connecting body 3221 is rotationally connected, and the top of the connecting body 3221 is rotationally connected to the bottom of the two ends of the rear cross beam 13. When the motor vehicle drives the frame 1 to turn and move, the connecting shaft head 313 is driven to rotate in the turning direction, and the connecting shaft head 313 drives the guide front axle 33 to move through the second transmission member 316 and the first transmission member 141 connected by transmission, and then drives the connecting body 3221 to deflect in the turning direction through the guide front axle 33, that is, the rear wheel 3222 deflects according to the corresponding angle of the turning direction of the frame 1, which can reduce the lateral friction between the tire and the ground, thereby protecting the tire from excessive wear.

[0045] The bottom of the first arm 311 is rotatably connected to a front wheel 312. The front wheel 312 can not only distribute and reduce the pressure of the rear wheel 3222, but also be driven by the connecting shaft head 313 to deflect during steering to provide auxiliary steering.

[0046] The structures of the connecting shaft head 313 and the second transmission member 316 and the first transmission member 141 which are transmission-connected to the connecting shaft head 313 are disclosed in detail below:

[0047] A first gear is provided at the contact point between the surface of the connecting shaft head 313 and the longitudinal beam 314. The second transmission member 316 is a gear set meshed with the first gear for transmitting the angle change of the connecting shaft head 313, including a second gear meshed with the first gear, the second gear is connected to the third gear through a belt drive, and the fourth gear is meshed at the bottom of the third gear.

[0048] The first transmission member 141 is connected to the gear set and drives the guide front axle 33 to move according to the angle change of the connecting shaft head 313, including a fifth gear connected to the fourth gear, the fifth gear is meshed with the sixth gear, and a guide groove 331 is opened on the surface of the guide front axle 33, and the sixth gear is meshed with the guide groove 331, that is, when the motor vehicle drives the frame 1 to turn, it will drive the connecting shaft head 313 to rotate in the turning direction, and then the second transmission member 316 and the first transmission member 141 drive the guide front axle 33 to move according to the rotation angle of the connecting shaft head 313 to adjust the deflection angle of the rear wheel 3222.

[0049] The following specifically discloses the rotational connection between the two ends of the guide front bridge 33 and the connecting body 3221:

[0050] A second arm 3225 is provided on one side of the connecting body 3221 close to the guide front bridge 33, and the bottoms of both ends of the guiding front bridge 33 are located in the second arm 3225. Both ends of the guiding front bridge 33 are rotatably connected with the second arm 3225. When the first transmission member 141 drives the guiding front bridge 33 to move, the guiding front bridge 33 will drive the connecting body 3221 to rotate, so that the rear wheel 3222 will deflect at a corresponding angle according to the steering direction of the frame 1.

[0051] Taking into account that the rigid connection between the two ends of the parking rear axle 321 and the brake drum plate 3224 will affect the rotation of the connecting body 3221, control arms 3211 are connected to the bottom of both ends of the parking rear axle 321, and control shafts 3213 are provided at the ends of the control arms 3211. The control shaft 3213 is rotationally connected to the brake drum plate 3224. Through the rotational connection, it can be ensured that the parking rear axle 321 can drive the brake drum plate 3224 to move, without affecting the rotation of the connecting body 3221.

[0052] When the frame 1 is brought to a designated location or parked midway, the frame 1 needs to be fixed. A return spring 111 is provided on the frame 11. The frame 11 is connected to the longitudinal beam 314 through the set return spring 111. When the frame 1 stops, the longitudinal beam 314 will be pushed to reset under the elastic force of the return spring 111, thereby driving the parking rear axle 321 to reset upward, and then driving the brake drum 3224 to contact the wheel shaft 3223, thereby preventing the rear wheel 3222 from rotating, thereby achieving a parking fixation effect.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fire trailer with a steering device, characterized in that: It includes a vehicle frame, an equipment box for storing fire-fighting equipment is arranged on the top of the vehicle frame, and a control device is arranged on the bottom of the vehicle frame; The vehicle frame includes a skeleton for supporting the equipment box and a traction cylinder arranged at one end of the skeleton; The control device includes a traction assembly, a parking assembly and a guide front axle which are transmission-connected with the traction assembly. The traction assembly is located in the traction cylinder and is used to connect with the motor vehicle. The parking assembly is used to control the movement of the vehicle. The guide front axle is rotationally connected with the parking assembly and is used to control the steering of the vehicle. The traction assembly includes a first arm rotatably connected to the traction cylinder, a connecting shaft head movable forward and backward is arranged in the first arm, the top end of the connecting shaft head passes through the outer wall of the first arm, a longitudinal beam is sleeved at the bottom of the connecting shaft head, and the end of the longitudinal beam is connected to the parking assembly; A rear cross beam is provided at one end of the frame away from the traction cylinder. The parking assembly includes a parking rear axle and a moving structure arranged at the bottom of the rear cross beam. The moving structure includes a connecting body and a rear wheel arranged outside the connecting body. The rear wheel is rotatably connected to the connecting body through a wheel axle. The top of the connecting body is connected to the bottom of both ends of the rear cross beam. A brake drum sheet for fitting with the surface of the wheel axle is provided in the connecting body. Both ends of the parking rear axle are connected to the brake drum sheet. The end of the longitudinal beam is slidably connected to the parking rear axle, and the outer walls at both ends of the parking rear axle are slidably connected to the inner wall at the bottom of the rear cross beam; A second transmission member is provided in the longitudinal beam, a front cross beam is provided between the traction cylinder and the rear cross beam, a first transmission member is provided in the front cross beam, the second transmission member is transmission-connected to the connecting shaft head, the other end of the second transmission member is transmission-connected to the first transmission member, a guide front axle is transmission-connected to the bottom of the first transmission member, the two ends of the guide front axle are rotationally connected to the connecting body, and the top of the connecting body is rotationally connected to the bottom of the two ends of the rear cross beam; When the motor vehicle drives the traction assembly to perform a steering movement, the traction assembly drives the parking assembly to deflect to a corresponding angle by guiding the front axle so as to reduce tire wear when the vehicle frame is performing a steering movement.

2. The fire-fighting trailer with a steering device according to claim 1, characterized in that: A beam groove penetrating the left and right surfaces is provided at the end of the longitudinal beam, and the beam groove is an arc-shaped groove. A beam shaft is correspondingly provided in the middle of the parking rear axle, and the beam shaft is slidably connected with the beam groove.

3. The fire-fighting trailer with a steering device according to claim 1, characterized in that: The bottom of the first supporting arm is rotatably connected with a front wheel.

4. The fire-fighting trailer with a steering device according to claim 1, characterized in that: A first gear is arranged at the contact point between the surface of the connecting shaft head and the longitudinal beam, and the second transmission member is a gear set meshing with the first gear for transmitting the angle change of the connecting shaft head.

5. The fire-fighting trailer with a steering device according to claim 1, characterized in that: A second support arm is arranged on one side of the connecting body close to the guide front bridge, and two ends of the guide front bridge are rotatably connected with the second support arm.

6. The fire-fighting trailer with a steering device according to claim 1, characterized in that: Control arms are connected to the bottom of both ends of the parking rear axle, and control shafts are arranged at the ends of the control arms. The control shafts are rotationally connected to the brake drums.

7. The fire-fighting trailer with a steering device according to claim 1, characterized in that: A return spring is arranged on the frame, and the frame is connected with the longitudinal beam through the arranged return spring.

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