KR20240086267A - Cabin Structure for improving getting on and off, aero-dynamic performance and appearance quality of cab over truck. - Google Patents

Abstract

The purpose of the present invention is to address the shortcomings of existing cab-over-type trucks when getting on and off, limitations in aerodynamic performance directly related to fuel efficiency, limitations on exterior design due to cab suspension and cab tilting, and disadvantages in terms of exterior marketability. The purpose is to provide a new cabin structure that can be improved or minimized. The opening starts from the front direction of the cabin (A-pillar area), and a cover member that functions as a corner bumper and step cover is located at the bottom. Through the door structure that opens and the cabin structure that opens when the cab is tilted, it is effective in improving the exterior design and exterior quality along with improving entry and exit and aerodynamic performance.

Description

Cabin structure for improving the aerodynamic performance, getting on and off, and appearance quality of cab over type trucks. {Cabin Structure for improving getting on and off, aero-dynamic performance and appearance quality of cab over truck.}

The present invention relates to the structure of a new cab-over-type truck cabin, and more specifically, to a cabin structure that can improve the previous disadvantages by applying a new door configuration and opening and closing method.

In general, trucks are divided into a bonnet type, where the engine is placed in the front of the cabin, and a cabover type, where the engine is placed at the bottom of the cabin.

Bonnet-type trucks are advantageous in terms of space utilization due to the front placement of the engine, and have the advantage of better aerodynamic performance and getting on and off than the cab-over type.

On the other hand, due to the forward placement of the engine, the overall length is long and the vehicle turning radius is increased, so there are regional or national limitations in operation depending on road requirements and vehicle battlefield regulations.

Cab-over-type trucks have a disadvantage in that they have a high cabin height due to the arrangement of the engine under the cabin, making it difficult to get in and out, and are disadvantageous in terms of aerodynamic performance due to the difficulty in streamlining the cabin shape compared to bonnet-type trucks. It is clear that this is a shortcoming that all manufacturers are trying to improve for the inevitable goal of improving fuel efficiency or increasing driving distance at a time when electric power is being actively used as well as the conventional internal combustion engine.

The advantage of the cab over type is that it has a shorter overall length and turning radius compared to the bonnet type, and the cabin is located high, providing good visibility for the driver.

Figure 1 is a diagram showing the structure of a cab-over-type truck. In general, the cabin 10 consists of a cabin 1 in which the driver rides and the interior and exterior members of the cabin, and the luggage is carried to the rear of the cabin 10. A loading unit 60 is configured, and depending on the configuration of the loading unit 60, it is divided into various types such as cargo, container, mixer, and dump. Both the cabin portion 10 and the loading portion 60 are configured on the upper side of the frame portion 40 including the frame 41 and members fixed to the frame.

Figure 2 shows in more detail the configuration of the cabin 1 and the lower frame portion 40 of the cabin 10 of a typical cab-over type truck, and the cabin 1 has upper portions on both sides. A step 34 is provided, and a step cover 20 covering this step is fixed to the door 21. In front of the cabin (1), a front lid (11) is provided for light maintenance, and between the door (21) and the front lid (11), a corner cover (usually equipped with a corner vane) is provided at the bottom of the A pillar. 12) is provided, but depending on the manufacturer, the front lid 11 and the corner cover 12 may be provided as one piece.

The cabin (1) is provided on the upper front part of the frame (41) where powertrain-related parts (42) such as the engine, front wheel and front wheel axle (43), front wheel steering device and suspension device (44), etc. are located, and is directed in both directions. A lower step 31, front fenders 32 and 14, a front mudguard 45 and members for supporting them are provided. The front of the frame 41 is provided with a cap suspension 45, a hinge structure 50 for tilting, a front bumper 49, lights, and members to support them, and the front bumper 49 is located at the center of the central part. It consists of a bumper (47) and an outer corner bumper (48). Some elements, such as boarding and disembarking steps 31 and 34, fenders 32 and 14, and lights, are distributed and provided to the cabin 10 and the frame 40 according to the vehicle configuration, installation regulations, and exterior design.

Steps 31 and 34 for getting on and off are located on both sides of the vehicle between the front bumper 49 and the front wheel 43, more specifically between the corner bumper 48 and the front wheel fender 32, and the height of the cabin is It is tall, so it is usually equipped with 3 to 4 steps for getting on and off, and is arranged almost vertically due to limitations in the width in both sides of the vehicle. When viewed from the side, which is the boarding and disembarking direction, it is biased forward compared to the door opening. The configuration of these loading and unloading steps is similar to vehicles from almost all large truck manufacturers due to the space constraints of the cab-over type.

Figure 3 is a cross-sectional view showing the configuration of steps for getting on and off of a typical cab-over type truck. The boarding and disembarking step consists of a lower step 31 fixed to the frame 41 and an upper step 34 fixed to the cabin 1. Unlike in the past when most of the steps were exposed to the outside except for the top step, which is naturally concealed by the door (21), a separate step cover (20) is fixed to the bottom of the door except for the bottom step to improve appearance quality and aerodynamic performance. ), there is a tendency to conceal it.

The reason why the step cover (20) fixed to the bottom of the door is not configured to conceal the lowest step of the lower step (31) is that when the step cover (20) is extended to conceal the lowest step, the front wheel portion (43) is damaged when the cab is tilted. , 32) occurs, and the lowest step is fixed to the frame 41 and the step cover is fixed to the cabin (1) together with the door (21), so unlike the upper step that is fixed to the cabin (1), the step cover This is because space is inevitably created between the and lower steps due to the operation of the cabin suspension, and this acts as a limitation in the step configuration.

In this way, various attempts and research and development are continuing to improve the deterioration of aerodynamic performance and appearance quality due to the configuration of the lower step portion exposed to the side.

Due to the vertical configuration of the boarding and disembarking steps, the driver's center of gravity is biased backward when getting on and off, so the driver gets on and off by holding on to the handles at the bottom of the A-pillar and B-pillar and hanging on to go up and down. Additionally, due to the vertical arrangement of the steps, it is difficult to secure a view of the steps when disembarking.

Due to the configuration of the boarding and disembarking steps being biased toward the front, the door must be fully opened when getting on and off, and the center of gravity is biased toward the front of the vehicle rather than the center of the door's opening area and both handles, so you must step on and off the vehicle.

Various inventions or attempts at improvement have been made to compensate for the shortcomings and safety of the embarkation and disembarkation steps of these cab-over-type trucks, but for reasons such as the addition of additional devices or complex structures and the increase in weight, they are not applied to mass-produced vehicles and remain as is. .

Figure 4 is a diagram showing a typical suspension system of a cab-over type truck. A large truck includes an axle suspension 44 between the frame 41 and axles (front wheels and multiple rear wheels), a frame 41, and It consists of cabin suspension (45,46) between cabins (1) and seat suspension inside the cabin.

For the operation of the cabin suspensions 45 and 46, a space equal to the operating stroke of the cabin suspension is required between the cabin part 10 and the frame part 40, which acts as an essential constraint on the exterior design of large trucks.

Figure 5 is a diagram showing the typical cab tilting structure of a cab-over-type truck. The cabin is usually tilted by the cab tilting hinge 50 provided at the front bottom of the cabin for maintenance and repair of major parts such as the engine located at the bottom of the cabin. It essentially has a structure that rotates forward.

For cab tilting, the space between the front part of the cabin (usually the front lid (11) and the corner vane part (12)) and the front part of the frame (usually the front center bumper (47) and corner bumper (48)) is required for the rotation of the cabin. Space is required, and this acts as an essential constraint on the front design.

Due to the cabin suspension and cab tilting operation, an operating space of the cabin connected from the front to the side of the vehicle is required between the cabin 1 or the exterior components mounted on the cabin and the exterior components mounted on the frame 41. Figure 6 shows the conventional cabin 1. This space is reflected in the exterior of the cab-over-type large truck. As of the time of filing of the present invention, all manufacturers' vehicles are similar except for the shape of the cabin design.

In this way, regardless of the manufacturer, efforts are being made to minimize constraints in terms of exterior design due to the inevitable space due to the movement stroke of the cab suspension and the turning radius when tilting the cab, but even to this day, there are common constraints in the exterior design of large trucks. It is a self-evident fact that it is a condition.

The matters described in the above background technology are intended to aid understanding of the background of the present invention. Most of the matters are already generally known to those skilled in the art, but some of the matters are not prior art. It can be included.

The present invention was invented to solve or improve the problems described in the background art, and the problem to be solved by the present invention is the shortcomings of the existing cab-over type truck when getting on and off and the aerodynamic performance directly related to fuel efficiency. The goal is to provide a cabin structure that can minimize the shortcomings in exterior design and exterior marketability due to cap suspension and cab tilting.

The cabin structure of a cab-over-type truck according to an embodiment of the present invention has an opening starting from the front of the cabin (lower part of the A-pillar) to achieve the above-described problem, and functions as a corner bumper and step cover. A door structure in which a cover member that combines the following is added to the bottom or is formed integrally with the door structure, and the door structure is characterized in that the door structure is opened when the cap is tilted.

The cover member that functions as a corner bumper and step cover, which is additionally or integrally formed at the bottom of the door and the door, is fixed to the cabin and is therefore spaced apart to prevent interference between parts fixed to the frame and the cabin suspension operation. Specifically, the door is provided in close contact with the cabin to seal the interior of the cabin when closed, and the cover member at the bottom of the door has the lowest step and supporting members fixed to the frame on the inside, and the center bumper toward the front. and the members supporting it are provided to be spaced apart in consideration of the operating stroke of the cabin suspension.

In the embodiment, the opening and closing method of the door is a so-called coach door method in which the opening starts from the front of the vehicle, but in addition to this, there are existing methods that can start from the front of the vehicle, such as the sliding method and the folding method. Several methods may be included.

The door may be operated manually as well as automatically opened and closed using a lifter or motor operated by hydraulic, pneumatic, or electric power, or a method in which these devices assist manual opening and closing.

A handle for getting on and off may be installed on both the side of the cabin and the inside of the door that are exposed when the door is opened, or on one of them, which can be held and lifted when going up and down the step.

The door may be equipped with a safety device, such as a physical or software control, that prevents the door from moving due to the force of a person getting on or off the door when a handle for getting on and off the inside of the door is applied.

The cover member that functions as a corner bumper and step cover, which can be fixed or integrated with the door, may include front lights and members supporting them depending on the cabin shape and the configuration range of the door part.

The cover member that functions as a corner bumper and a step cover, which is fixed or integrated to the door and its bottom, is provided on both sides of the cabin, and depending on the configuration of the driver's seat and passenger seat inside the cabin, getting on and off is not on both sides of the cabin, but on one side. If it consists only of , the other side can be used as an opening and closing part for light maintenance or storage space.

Since the door opening starts from the front of the vehicle, it is possible to have a step configuration facing the front of the vehicle as well as the conventional uniform configuration, that is, a vertical configuration toward the side, and a stepped configuration as well as a vertical configuration is possible. do.

The boarding and disembarking steps according to an embodiment of the present invention are fixed to the frame from the lowest step to the third step, and the uppermost step is fixed to the cabin, but the mounting of the steps depends on the number and height of the steps, the height of the vehicle, the exterior design of the cabin, etc. Configuration may change.

The door structure including the corner bumper and step cover, which is a feature of the present invention, is opened from the lower part of the A-pillar, allowing for a different configuration of the entry and exit steps than before, and improving aerodynamic performance and appearance of the lower door and step area. Freedom in design can be increased, and as in the embodiment, the cabin shape and step cover shape can be modified for more active aerodynamic performance improvement.

The door structure, including the corner bumper and step cover, is open when the cab is tilted, which minimizes the existing external constraints caused by the cap suspension stroke and cab tilting turning radius, and has the effect of breaking away from the conventional standardized configuration. there is.

The application of a door structure including a corner bumper and a step cover not only improves the shape and aerodynamic performance of the front corner area composed of the conventional corner vane (corner cover), corner bumper, step cover, and door, but also simplifies the parts and improves the aerodynamic performance. It is possible to improve appearance quality through

Compared to previous ones developed or invented for the same or similar effects as above, it is important to recognize the difference that can be solved through a new structure of the cabin rather than an additional device or structure.

1 is a side view to explain the configuration of a typical cab-over type truck.
Figure 2 is a diagram showing the configuration of the cabin and frame of a general cab-over type truck.
Figure 3 is a cross-sectional view showing the structure of the step portion of a general cab-over type truck.
Figure 4 is a diagram showing the suspension configuration of a typical cab-over type truck.
Figure 5 is a diagram showing the cab tilting structure of a general cab-over type truck.
Figure 6 is a diagram showing the separation shape between the cabin and the frame, which is common in the exterior shape of conventional cab-over-type trucks for cab tilting and cabin suspension operation.
Figure 7 is a diagram showing an embodiment of a cab-over type truck to which a door structure according to the present invention and a corresponding change in step configuration are applied.
Figure 8 is a diagram showing the cabin part, door part (door structure), and frame part separated to help understand Figure 7.
Figure 9 is a view expressing the separated door structure of Figure 8 in more detail.
Figure 10 is a view showing the opening of the cabin in an open state in an embodiment of the present invention.
Figure 11 is a top view to aid understanding of Figure 10.
Figure 12 is a diagram showing an opening and closing portion for light maintenance and storage space according to an embodiment of the present invention.
Figure 13 is a diagram showing a state in which the door structures on both sides are open for a cap tilting operation according to an embodiment of the present invention.
Figure 14 is a diagram showing a state in which cap tilting is performed according to an embodiment of the present invention.
Figure 15 is a diagram showing the apparent separation space required for the cap suspension and cap tilting operation according to an embodiment of the present invention.
Figure 16 is a diagram showing a modification applicable to the embodiment of the present invention.

The present invention is described in detail using the attached drawings as follows. In the specific description, unnecessary or redundant descriptions may be omitted to fully explain the present invention to a person with average knowledge in the art, and elements in the drawings that are unrelated or not directly related to the content of the present invention may be omitted. Their expressions may be omitted or simplified.

The shape, size, thickness, and spacing of each component and member shown in the drawings are arbitrarily shown to explain the technical idea of the present invention through an example and should not serve as a limiting factor for the present invention.

In addition, for smooth explanation through examples, components or operating principles that are not related to the core or novelty of the technical idea of the present invention may be used by those with commonly used technology or average knowledge in the field as of the time of filing of the present invention. Since it is arbitrarily selected from among technologies that can be easily changed or modified, it should not serve as a limiting factor for the present invention.

Before explaining the embodiment of the present invention, the shape of the cabin and the internal configuration of the cabin shown in this embodiment are a cabin in which the door structure that functions as a corner bumper and a step cover, which is a feature of the present invention, is opened from the front of the vehicle. Since it is set to maximize the effect that can be achieved through the structure of , it should not act as an essential or limiting element of the present invention.

In the specific description according to an embodiment of the present invention, a cover member that combines the functions of a corner bumper and a step cover and is added and fixed to the lower part of the door or provided integrally with the door is herein referred to as a 'door bottom cover' for convenience. do.

Since the door bottom cover is classified in this specification to more easily explain the present invention using conventional names and functional concepts, the requirement of being added and fixed to the door or integrated with the door, like the conventional step cover, is not met in this specification. It should not act as a limiting factor for the invention.

The door bottom cover is added to and fixed to the door or is provided integrally with the door and operates together when the door is opened and closed, so the door and the cover are collectively referred to as 'door structure' in this specification for convenience.

The cabin and frame portion that is opened or concealed due to the opening and closing operation of the door structure is referred to as an 'opening and closing portion' for convenience in this specification.

In expressing the step portion exposed when the opening and closing unit is opened, the step fixed to the frame and the members for supporting it are referred to as the 'first step portion' , and the steps fixed to the cabin and the members for supporting the step are referred to as the 'second step portion '. It is specified as

Figures 7 and 8 show a frame in which the cabin (1) has an opening starting from the lower part of the A-pillar of the vehicle according to the present invention and is provided on both sides with a door structure (23) including a door (21) and a door bottom cover (22). It is configured on the upper side of the frame 41 of the part 40, and the first step part 33 and the second step part 36 are each attached to the frame part 40 so that the door structure 23 can be raised and lowered by opening. This is a drawing showing an example of the cabin structure of a cab-over-type truck, which is provided in the cabin section 10 and has a structure in which the door structure 23 is partially or fully opened when the cab is tilted. The loading section of the truck is omitted and only the cabin section is shown. 8 is a view showing the frame part 40, the cabin part 10, and the cabin and the door structure 23 separated to help structural understanding, and Figure 9 shows the door structure 23 separated in Figure 8. This is a drawing that expresses in more detail. Figure 10 is a view showing the door structure 23 provided in the cabin in an open state in the same embodiment, and Figure 11 is a top view of Figure 10.

The door structure 23 according to an embodiment of the present invention has a rotation axis fixed to the B pillar and a locking device installed at the lower part of the A pillar so that the cabin can be opened from the lower part of the A pillar.

As shown in a-a' of Figure 7, the door bottom cover 22 is fixed to the cabin together with the door 21, so it is spaced apart from the first step part 33 and the center bumper part 47 fixed to the frame. and is provided.

As shown in Figure 8, the door portion 21 of the door structure 23 may include the function and shape of a corner vane 12 in terms of its configuration and location.

The door bottom cover 22 is configured to conceal the sides and front of the steps and step members 33 and 36 exposed to the bottom of the door when the door is closed, and serves as a front corner bumper due to its scope and location. Be humble

The door bottom cover 22 may be equipped with some or all of the front lights and members to support them. However, since the installation of lights is subject to significant legal restrictions, the shape of the cabin and the lights must be adjusted as shown in the modified example of Figure 16. It will vary depending on the scope of the door structure. Expressed in more detail, this is because, as shown in the modified example of Figure 16, the position of the A-pillar portion, which is the starting point of the opening of the door structure 23 of the present invention, in the vehicle width direction varies depending on the shape of the cabin.

Between the door structure 23 and the cabin 1, in addition to the hinge structure of the door, separate members such as lifters or motors that can assist or automate the opening and closing of the door structure may be provided, and the members related to such opening and closing are described herein. For convenience, it is referred to as an ‘opening/closing member’ .

As shown in Figures 10 and 11, the door structure 23 is opened so that the driver can enter and exit the cabin using the boarding and disembarking steps 31 and 34, and the opening and closing method of the door structure 23 is a manual opening and closing method; Or automatic opening and closing method through hydraulic, pneumatic, electric lifter, etc.; These devices can be provided with a method of assisting manual opening and closing through the opening and closing member.

The side of the cabin exposed by opening the door structure 23 and the inside of the door or one of these may be provided with handles 13 and 24 for getting on and off as shown in Figures 8 and 9, and on the inside of the door In the case of the handle 24 for getting on and off, a safety device that prevents the door structure from opening and closing due to the force of the person getting on and off may be included in the opening and closing member.

The opening and closing method and operating method of the door structure 23 shown in the embodiment of the present invention are arbitrarily selected from the so-called coach door (or suicide door) method using a fixed hinge, which is the most common method currently used. It is understood that other conventional methods such as sliding doors or folding doors that can be opened and closed from the front of the cabin, which is the purpose of the present invention, can also be modified in various ways by a person with average skill in the art. shall.

As shown in Figure 8, the step member according to the embodiment of the present invention is composed of four stages, a first step part 33 fixed to the frame 41 and a second step part 34 fixed to the cabin 1. ) is composed of. The first step part 33 is made up of steps fixed to the frame 41 and members 32 for supporting them, and the second step part 36 is a step 34 fixed to the cabin 1. and members 35 to support it.

The step members not only have a vertical configuration facing the side, but also can be configured in a stepped configuration as it becomes spatially possible to face the front of the vehicle.

In the configuration of the step members, the installation direction and number of steps, width, length, spacing, angle of stair configuration, etc. are shown in the examples to maximize the effect of improving boarding and disembarking and aerodynamic performance that can be brought about by the present invention. It is a configuration that matches the shape and height of the applied cabin and the internal configuration of the cabin, and as shown in the modified example of Figure 16, it may vary depending on the shape of the cabin, the internal configuration of the cabin, the range of the opening and closing portion, etc., and thus serves as a limiting factor for the present invention. won't work.

The door structure 23 is provided on both sides of the cabin as in the embodiment of the present invention, and as shown in Figure 12, one side may be composed of an opening and closing portion for boarding and disembarking, and the other side may be composed of an opening and closing portion for light maintenance and storage space. there is.

In this specification, the opening and closing unit for boarding and disembarking is referred to as the ‘getting on and off opening unit’ , and the opening and closing unit for light maintenance and storage space use is referred to as the ‘light maintenance opening and closing unit.’

In addition, as in the modified example shown in Figure 16, both opening and closing parts can be configured as boarding and disembarking openings and closing parts, and it should be understood that this is an example that can be modified and applied according to the shape of the cabin or the internal configuration of the cabin while maintaining the technical idea and fundamental effect of the present invention. do.

The opening and closing part revealed by opening the door structure 23' for storage space and light maintenance shown in Figure 12 is also in the same condition as the boarding and disembarking opening and closing part, so the frame (like the configuration of the first step part 33 and the second step part 36) is It consists of a first component (33') fixed to 41) and a second component (36') fixed to the cabin.

As shown in Figure 12, the light maintenance opening and closing part includes a side glass and members for operating the side glass, and a storage space 15 instead of the step parts 33 and 36 of the entering and exiting opening and closing part, and is provided inside the conventional front lid 11. Some of the various light maintenance parts (coolant tank, multi-box, oil inlet, etc.) and auxiliary steps 16 for light maintenance and car washing may be provided.

One side of the opening and closing portions provided on both sides may be provided with a cap tilting control device 17 and a separate cover member 19 for using the tow hook fixing device 18 fixed to the frame, as shown in FIG. 12.

Hereinafter, the operation and action according to the embodiment of the present invention configured as above will be described.

According to an embodiment of the present invention, the side and front of the first step portion 33 are completely concealed by the door and the door bottom cover 22, and the door bottom cover 22 is fixed to the frame 40 in the first step. It is formed at the bottom of the door 21 by maintaining a certain clearance with the portion 33 and the center bumper portion 47, and the door structure 23 constructed in this way is fixed to the cabin 1, as shown in Figure 15. Likewise, shortcomings in appearance marketability and aerodynamic performance due to the previous cap suspension stroke and exposed step members can be resolved, and the degree of freedom in exterior design can be increased.

As shown in Figures 10 and 11, when the driver gets on and off, the door structure 23 opens sufficiently to allow an adult male to enter and exit, and the boarding and disembarking step members 33 are arranged in steps according to the opening of the door structure 23. , 36), handles 13 and 24 fixed to the inside of the cabin and the inside of the door are exposed to the left and right of the step. This allows the driver to get on and off the vehicle stably, just like going up and down regular stairs.

As shown in Figures 10 and 11, when the driver gets on and off, the door structure 23 opens sufficiently to allow an adult male to enter and exit, and the boarding and disembarking step members 33 are arranged in steps according to the opening of the door structure 23. , 36), handles 13 and 24 fixed to the inside of the cabin and the inside of the door are exposed to the left and right of the step. This allows the driver to get on and off the vehicle stably, just like going up and down regular stairs.

As shown in Figure 13, when the cab is tilted, the bottom of the door structure provided on both sides of the cabin is opened by a certain amount to avoid interference with the first step part 33 and the front wheel part and center bumper part 47, so that the cab is tilted as shown in Figure 14. Tilting is performed.

The cab tilting control device 17 is provided on one side of the cabin 1 and may include a function to control the operation of the door structures 23 on both sides of the cabin.

The cab tilting control device 17 may include a physical safety device and a software-controlled safety device that prevents cab tilting when the door structures 23 on both sides of the cabin are closed.

Although the technical idea and fundamental effects of the present invention have been described above with limited examples and drawings, various modifications can be made by those skilled in the art based on this description, so the scope of rights of the present invention is attached. It should be interpreted according to the scope of the patent claims.

Cabin (10) 1~
Door part 20~
Step 31~
Frame part (40) 41~
Loading unit (60)

Claims (6)

In the configuration of the cabin of a cab-over type truck, the door bottom cover, which functions as a step cover for getting on and off and a corner bumper, forms a door structure together with the door, and this door structure starts from the front part of the cabin (A-pillar part). A cabin structure provided on both sides of the cabin so that the opening begins, and characterized in that the door structure opens and tilts when the cab is tilted. In claim 1,
The step part for getting on and off is composed of a first step part fixed to the frame and a second step part fixed to the cabin. A cabin structure characterized by a vertical configuration facing forward as well as a stepped configuration facing forward. In claim 1,
The door structure can be configured in such a way that the door bottom cover is integrated with the door or is additionally fixed to the door, and is characterized by being equipped with a pivot and locking device for the door so that the opening starts from the front of the vehicle. . In claim 1,
The door bottom cover is provided to completely hide the step member when the door structure is closed, and also functions as a corner bumper. To avoid interference due to the operation stroke of the cap suspension, the door bottom cover is provided to the first step inward and to the front of the vehicle. is characterized in that it is provided to be spaced apart from the center bumper portion. In claim 1,
An opening and closing member may be provided between the door structure and the cabin to assist in opening and closing the door structure or to enable automatic opening and closing,
The cab tilting control device may include a function to control the opening and closing of the door structure, and a physical safety device that prevents cab tilting from being performed without opening the door structure at least is provided on the opening and closing member or the cabin. In claim 1,
The opening and closing portions of the door structure are provided on both sides of the cabin,
Depending on the configuration of the interior of the cabin, both sides may be provided with openings and closings for boarding and disembarking, or one side may be provided with openings and closings for storage space and light maintenance.