Multifunctional boarding frame step of heavy semi-trailer tractor

Abstract

The multifunctional boarding frame step of the heavy semi-trailer tractor comprises two side supporting rods arranged at intervals in the front-back direction, a cross beam and a pedal, each side supporting rod comprises an upper rod and a lower rod, the upper rod is provided with an upper horizontal section and an upper inclined section, and the lower rod is provided with a lower horizontal section and a lower inclined section. The left end of the upper horizontal section and the left end of the lower horizontal section are flush and connected to the side wall of a frame in a welded mode, the bottom of the upper inclined section and the top of the lower inclined section are connected in a welded mode, a bottom plate is connected between the lower rods, and a fire extinguisher fixing base is arranged on the bottom plate. The pedals comprise the first pedal arranged on the first cross beam, the second pedal arranged on the second cross beam and the third pedal erected on the upper horizontal section, the height of a single stage can be greatly reduced when a driver climbs the frame, a short driver can use the pedal conveniently, a fire extinguisher can be contained in the pedals, and the safety during use is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of semi-trailer tractors, and in particular relates to a multifunctional boarding frame step for a heavy-duty semi-trailer tractor. Background Art

[0002] A semi-trailer tractor is a commercial vehicle equipped with special equipment for towing a semi-trailer. The front vehicle with driving ability is called the tractor, and the rear vehicle without driving ability is called the trailer. The trailer is towed by the tractor. There are two ways to connect the tractor and trailer: the first is that the front half of the trailer is placed on the traction saddle at the rear end of the tractor frame, and the axle at the rear of the tractor bears part of the trailer's weight. This is called a semi-trailer. The second is that the front end of the trailer is connected to the rear end of the tractor frame. The tractor only provides forward pulling force, towing the trailer, but does not bear the downward weight of the trailer. This is called a full trailer.

[0003] For semi-trailer tractors, the trailer and the tractor not only need a mechanical connection to transmit power, but also an electrical connection to transmit electricity to supply the taillight group and transmit compressed gas as the power source of the air brake. This part of the electrical connection pipeline is mostly set up on the tractor frame. When performing trailer replacement (swinging and unhooking) operations, the driver needs to board the tractor frame to plug and unplug the electrical lines. The height of the tractor frame is high, and the traditional boarding frame steps mostly use the battery shell as a support, and only one pedal is installed. For drivers of shorter height, it is inconvenient to use and easily causes the risk of falling. At the same time, when the trailer is a hazardous chemical vehicle, it needs to be equipped with two fire extinguishers weighing more than 4 kilograms. Most drivers put the fire extinguishers in the cab. Once a car accident occurs, the triggering and leakage of the fire extinguisher can easily cause secondary injuries to the driver. Moreover, for wing box trailers, additional power connections are required. These power lines are exposed, which can easily cause vehicle short circuits and fires, and have poor safety. Utility Model Content

[0004] The purpose of the utility model is to overcome one or more shortcomings in the prior art and to provide a multifunctional boarding frame step for a heavy-duty semi-trailer tractor.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is that a multifunctional boarding frame step for a heavy-duty semi-trailer tractor comprises:

[0006] Two side support rods spaced apart in the front-to-rear direction;

[0007] A crossbeam disposed between the two side support rods;

[0008] a pedal provided on the crossbeam and / or the side support rod;

[0009] The side support rod comprises an upper rod and a lower rod, the left end portion of the upper rod horizontally extending to the left to form an upper horizontal section, the right end portion of the upper rod obliquely extending to the right and lower sides to form an upper inclined section, the left end portion of the lower rod horizontally extending to the left to form a lower horizontal section, the right end portion of the lower rod obliquely extending to the right and upper sides to form a lower inclined section, the left end portion of the upper horizontal section and the left end portion of the lower horizontal section are flush and welded to the side wall of the frame of the heavy-duty semi-trailer tractor, the bottom of the upper inclined section is welded to the top of the lower inclined section, a bottom plate is connected between the lower rods, and a fire extinguisher fixing seat is provided on the bottom plate;

[0010] The crossbeam includes a first crossbeam mounted on the bottom of the upper horizontal section, a second crossbeam mounted on the middle of the upper horizontal section, and the pedal includes a first pedal arranged on the first crossbeam, a second pedal arranged on the second crossbeam, and a third pedal mounted on the upper horizontal section.

[0011] Preferably, the upper rod is a hollow round rod or a square rod, and the lower rod is an angle steel.

[0012] Preferably, the height difference between the third pedal and the second pedal is equal to the height difference between the second pedal and the first pedal, and both are equal to the height of the first pedal from the ground.

[0013] Preferably, the third pedal is lower than the upper surface of the frame, and the height difference between the third pedal and the upper surface of the frame is smaller than the height of the first pedal from the ground.

[0014] Preferably, the front end portion and the rear end portion of the third pedal both extend to the outside of the side support rod.

[0015] Further preferably, the upper horizontal section located at the rear is connected to a support plate extending backward, the rear end portion of the third pedal is rotatably connected to the rear end portion of the support plate by a hinge, and the upper horizontal section located at the front is connected to a locking plate extending forward, and when the third pedal is flipped to fit into the support plate, the locking plate can lock the third pedal.

[0016] Preferably, the fire extinguisher fixing seat is located between the lower horizontal sections and within the projection area of ​​the third pedal on the base plate.

[0017] Preferably, the upper surface of the third pedal is provided with a plurality of anti-slip grooves extending in the front-to-back direction, and these anti-slip grooves are evenly spaced in the left-to-right direction. The bottom wall of the anti-slip groove in the middle is connected to a pull ring for facilitating flipping up the third pedal.

[0018] Preferably, through holes are provided on the ridges between adjacent anti-slip grooves, and there are a plurality of through holes distributed at intervals along the front-to-back direction.

[0019] Preferably, the bottom plate is further provided with a slot for inserting a tire stopper, and the slot is located between the lower inclined sections.

[0020] Preferably, the side support bar is located between the fuel tank and the rear wheels of the heavy-duty semi-trailer tractor.

[0021] Preferably, the multifunctional boarding frame step of the heavy-duty semi-trailer tractor further includes a wing box external power supply box, which is fixed on the side wall of the frame and located behind the side support rod.

[0022] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0023] The utility model provides a multifunctional boarding frame step for a heavy-duty semi-trailer tractor, comprising two side support rods arranged at intervals in the front and rear directions, a cross beam arranged between the two side support rods, and a pedal arranged on the cross beam and / or the side support rods. By making the side support rod include an upper rod and a lower rod, the upper rod has an upper horizontal section and an upper inclined section, and the lower rod has a lower horizontal section and a lower inclined section, the left ends of the upper horizontal section and the lower horizontal section are flush and welded to the side wall of the frame, the bottom of the upper inclined section and the top of the lower inclined section are welded, a bottom plate is connected between the lower rods, and a fire extinguisher fixing seat is arranged on the bottom plate; the cross beam includes a first cross beam mounted on the bottom of the upper horizontal section and a second cross beam mounted in the middle of the upper horizontal section, and the pedal includes a first pedal arranged on the first cross beam, a second pedal arranged on the second cross beam, and a third pedal mounted on the upper horizontal section, the height of a single step when boarding the vehicle can be greatly reduced, which is convenient for use by drivers with shorter heights, and a fire extinguisher can be accommodated in the step, thereby improving safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a main schematic diagram of a preferred embodiment of the utility model.

[0025] Figure 2 yes Figure 1 Schematic diagram of the right side.

[0026] Figure 3 yes Figure 1 The top view diagram of the image is shown in the figure. The view direction has been adjusted for easier observation.

[0027] Among them: 11. Upper rod; 111. Upper horizontal section; 112. Upper inclined section; 113. Support plate; 114. Hinge; 115. Locking plate; 12. Lower rod; 121. Lower horizontal section; 122. Lower inclined section; 21. First crossbeam; 22. Second crossbeam; 31. First pedal; 32. Second pedal; 33. Third pedal; 34. Anti-slip hole; 35. Anti-slip groove; 36. Raised ridge; 37. Through hole; 38. Pull ring; 40. Bottom plate; 41. Fire extinguisher fixing seat; 42. Slot; 51. Recoil stop; 52. External power box of wing box. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0029] The left and right directions described in this utility model are Figure 1 The left and right directions are also the left and right directions of the tractor, and the front and rear directions described in the present invention are Figure 2 The left and right directions in the vehicle are also the front and rear directions of the tractor.

[0030] like Figures 1 to 3 As shown, the multifunctional boarding frame step of a heavy-duty semi-trailer tractor provided by the present invention comprises: a side support rod, a cross beam, and a pedal, wherein there are two side support rods and are arranged at intervals in the front-to-rear direction, the two side support rods are located between the fuel tank and the rear wheel of the heavy-duty semi-trailer tractor, the cross beam is arranged between the two side support rods, and the pedal is arranged on the cross beam and the side support rods; specifically, the side support rod comprises an upper rod 11 and a lower rod 12, the left end portion of the upper rod 11 extends horizontally to the left to form an upper horizontal section 111, the right end portion of the upper rod 11 extends obliquely to the lower right to form an upper inclined section 112, the left end portion of the lower rod 12 extends horizontally to the left to form a lower horizontal section 121, the right end portion of the lower rod 12 extends obliquely to the upper right to form a lower inclined section 122, and the upper The left end of the horizontal section 111 and the left end of the lower horizontal section 121 are flush and welded to the side wall of the frame of the heavy-duty semi-trailer tractor. The bottom of the upper inclined section 112 is welded to the top of the lower inclined section 122. A space for placing the fire extinguisher 53 is formed between the upper rod 11 and the lower rod 12. A bottom plate 40 is connected between the lower rods 12, and a fire extinguisher fixing seat 41 is provided on the bottom plate 40; the crossbeam includes a first crossbeam 21 mounted at the bottom of the upper horizontal section 111, and a second crossbeam 22 mounted in the middle of the upper horizontal section 111. The pedals include a first pedal 31 arranged on the first crossbeam 21, a second pedal 32 arranged on the second crossbeam 22, and a third pedal 33 mounted on the upper horizontal section 111.

[0031] The advantage of this setting is that it can significantly reduce the height of a single step when boarding the vehicle, making it more convenient for shorter drivers to use it. It can also accommodate a fire extinguisher in the step, improving safety during use.

[0032] To facilitate connection and improve strength, in this embodiment, the upper rod 11 is a hollow round rod, the upper horizontal section 111 and the upper inclined section 112 are bent from the hollow round rod, and the lower rod 12 is an angle steel, which can better support and be welded to the upper inclined section 112.

[0033] To further improve the convenience of use, in this embodiment, the height difference between the third pedal 33 and the second pedal 32 is equal to the height difference between the second pedal 32 and the first pedal 31, and both are equal to the height of the first pedal 31 from the ground. At the same time, the third pedal 33 is lower than the upper surface of the frame, and the height difference between the third pedal 33 and the upper surface of the frame is less than the height of the first pedal 31 from the ground.

[0034] To facilitate the removal and placement of the fire extinguisher, in this embodiment, the third pedal 33 is a reversible pedal. Specifically, the front and rear ends of the third pedal 33 extend to the outside of the side support rod. The upper horizontal section 111 located at the rear is connected to a support plate 113 extending backward. The rear end of the third pedal 33 is rotatably connected to the rear end of the support plate 113 by a hinge 114. The upper horizontal section 111 located in the front is connected to a locking plate 115 extending forward. When the third pedal 33 is flipped to fit with the support plate 113, the locking plate 115 can lock the third pedal 33. This locking method can be achieved by using a lock buckle, a lock groove, and a lock that cooperates with each other. This is a prior art and will not be repeated here. At the same time, the fire extinguisher fixing seat 41 is located between the lower horizontal sections 121 and is located within the projection area of ​​the third pedal 33 on the base plate 40.

[0035] To prevent slipping, in this embodiment, anti-slip holes 34 are provided on the first pedal 31 and the second pedal 32, and the upper surface of the third pedal 33 is provided with multiple anti-slip grooves 35 extending along the front-to-back direction. These anti-slip grooves 35 are evenly spaced along the left-to-right direction, and the ridges 36 between adjacent anti-slip grooves 35 are provided with through holes 37 for anti-slip function. There are multiple through holes 37 and they are spaced along the front-to-back direction. To facilitate flipping over the third pedal 33, the bottom wall of the anti-slip groove 35 in the middle is connected to a pull ring 38 for flipping over the third pedal 33.

[0036] In this embodiment, a slot 42 for inserting a tire stopper 51 is also provided on the base plate 40, and the slot 42 is located between the lower inclined sections 122. Furthermore, the multifunctional boarding frame step of the heavy-duty semi-trailer tractor also includes a wing box external power supply box 52, which is fixed on the side wall of the frame and located behind the side support rod.

[0037] It should be noted that the spacing between the upper horizontal section 111 and the lower horizontal section 112 is based on the convenience of taking and placing two fire extinguishers 53. At the same time, the inclination angles of the upper inclined section 112 and the lower inclined section 122 are based on the convenience of climbing onto the pedal and do not exceed the width of the tractor.

[0038] The multifunctional boarding frame step of heavy-duty semi-trailer tractor has the following features:

[0039] (1) It has multiple functions such as stepping, fire extinguisher storage, tire stopper storage, and wing box external power box.

[0040] (2) The step adopts three-level pedals to reduce the height, which can reduce the risk of losing control of the center of gravity.

[0041] (3) Fire extinguishers, tire locks, etc. can be stored outside the cab to reduce the risk of secondary injuries to the cab occupants after an accident.

[0042] (4) It can fix the power supply of the wing box to prevent the power supply from being pulled and connected privately, and avoid the hidden danger of short circuit and fire in the vehicle.

[0043] When in use, open the third pedal lock, lift the step backwards, and then you can take out the fire extinguisher; you can conveniently take out the tire thrusters directly from the bottom; when towing or dropping, go up through the three-level pedal, plug and unplug the power connection line, air intake pipe, air outlet pipe, ABS power connection line, etc., to achieve towing or dropping.

[0044] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A multifunctional boarding step for a heavy-duty semi-trailer tractor, comprising: Two side support rods spaced apart in the front-to-rear direction; A crossbeam disposed between the two side support rods; a pedal provided on the crossbeam and / or the side support rod; Its characteristics are: The side support rod comprises an upper rod and a lower rod, the left end portion of the upper rod horizontally extending to the left to form an upper horizontal section, the right end portion of the upper rod obliquely extending to the right and lower sides to form an upper inclined section, the left end portion of the lower rod horizontally extending to the left to form a lower horizontal section, the right end portion of the lower rod obliquely extending to the right and upper sides to form a lower inclined section, the left end portion of the upper horizontal section and the left end portion of the lower horizontal section are flush and welded to the side wall of the frame of the heavy-duty semi-trailer tractor, the bottom of the upper inclined section is welded to the top of the lower inclined section, a bottom plate is connected between the lower rods, and a fire extinguisher fixing seat is provided on the bottom plate; The crossbeam includes a first crossbeam mounted on the bottom of the upper horizontal section, a second crossbeam mounted on the middle of the upper horizontal section, and the pedal includes a first pedal arranged on the first crossbeam, a second pedal arranged on the second crossbeam, and a third pedal mounted on the upper horizontal section.

2. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The upper rod is a hollow round rod or a square rod, and the lower rod is an angle steel.

3. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The height difference between the third pedal and the second pedal is equal to the height difference between the second pedal and the first pedal, and both are equal to the height of the first pedal from the ground.

4. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The third pedal is lower than the upper surface of the frame, and the height difference between the third pedal and the upper surface of the frame is smaller than the height of the first pedal from the ground.

5. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The front end portion and the rear end portion of the third pedal both extend to the outer side of the side support rod.

6. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 5 is characterized in that: The upper horizontal section at the rear is connected to a support plate extending backward, the rear end of the third pedal is rotatably connected to the rear end of the support plate by a hinge, and the upper horizontal section at the front is connected to a locking plate extending forward, and when the third pedal is flipped to fit into the support plate, the locking plate can lock the third pedal.

7. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The fire extinguisher fixing seat is located between the lower horizontal sections and within the projection area of ​​the third pedal on the base plate.

8. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1 is characterized in that: The upper surface of the third pedal is provided with a plurality of anti-skid grooves extending in the front-to-back direction. These anti-skid grooves are evenly spaced in the left-to-right direction. The bottom wall of the anti-skid groove in the middle is connected with a pull ring for facilitating the flipping up of the third pedal.

9. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 8, characterized in that: Through holes are provided on the ridges between the adjacent anti-slip grooves. There are a plurality of through holes distributed at intervals along the front-to-back direction.

10. The multifunctional boarding step for a heavy-duty semi-trailer tractor according to claim 1, characterized in that: The bottom plate is also provided with a slot for inserting a tire stopper, and the slot is located between the lower inclined sections.

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