JP2022038552A - Electrically-driven truck - Google Patents

Abstract

To provide an electrically-driven truck which can ensure slide collision safety of a battery located between frames.SOLUTION: An electrically-driven truck, that has a ladder frame in which a pair of side frames 20 comprising a web 20a and flanges 20b, 20c face each other in a vehicle width direction, includes: a battery unit 8 including a battery located between the pair of side frames 20; and a protector 10 having a protective plate 11 and a support plate 12. The protective plate 11 has a battery protection surface 11a which faces the battery unit 8 and is substantially parallel to the web 20a. The support plate 12 supports the protective plate 11 by connecting both ends in a vehicle height direction Z of the battery protection surface 11a and a midship part in the vehicle height direction Z of the web 20a. The protector 10 is so located that at least one corner part of the battery unit 8 and the battery protection surface 11a face each other in a vehicle width direction Y.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electric truck.

From the viewpoint of reducing the environmental load, the development of electric vehicles such as electric vehicles and hybrid vehicles, which are equipped with a drive battery and are driven by supplying power to the motor from the battery, is in progress. In recent years, with respect to such electric vehicles, electric vehicles have also been developed in the field of commercial vehicles such as trucks (see Patent Document 1).

Further, in order to put into practical use an electric vehicle capable of a sufficient mileage in an electric truck having a heavier vehicle weight than a passenger car, it is an issue to increase the battery capacity that can be mounted on the vehicle. Therefore, when such a battery is mounted on a truck, it is required to increase the battery capacity as an arrangement between frames.

Japanese Unexamined Patent Publication No. 2016-113063

However, when arranging the battery in such a layout, due to the frame deformation caused by the collision (side collision) from the side of the vehicle, not the web of the frame but the flange end having a relatively small contact area is physically attached to the battery. It becomes an input point. When such a side collision occurs, a higher physical input is generated in the battery as compared with the case of surface contact, and there is a possibility that the safety at the time of the side collision of the battery cannot be ensured.

From the above, the problem to be solved in the present application is to provide an electric truck capable of ensuring the side collision safety of the batteries arranged between the frames.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following aspects or application examples.

The electric truck according to the present application example is an electric truck having a pair of side frames each having a web and flanges provided at both ends of the web and having rudder frames facing each other in the vehicle width direction, and the pair of electric trucks. A battery unit including a battery arranged between the side frames, a protective plate having a battery protective surface provided so as to face the battery unit and substantially parallel to the web, and a vehicle height of the battery protective surface. A protector comprising a support plate that supports the protective plate by connecting both ends in the direction and a central portion of the web in the vehicle height direction, wherein the protector is at least the battery unit in the vehicle width direction. It is characterized in that one corner portion and the battery protection surface are arranged so as to face each other.

In the electric truck according to the above application example, the corner portion of the battery unit and the battery protection surface of the protection plate come into contact with each other at the time of side collision. As a result, the physical input to the corners of the battery unit is dispersed as compared with the case where the points act, so that the physical input to the battery unit can be reduced.

Further, according to the protector according to the above application example, since both ends of the battery protection surface of the protective plate in the vehicle height direction and the center portion of the web of the side frame in the vehicle height direction are connected by the support plate, a side collision occurs. Collision energy can be well absorbed by deformation of the protective plate and support plate. As a result, the input to the battery unit can be further reduced. Therefore, the side collision safety of the batteries arranged between the frames can be ensured.

Further, according to the protector according to the above application example, the space between the protective plate and the support plate and the space between the side frame and the support plate can be used as a wiring space for members such as wires, pipes and tubes. At the same time, the protection of these members at the time of side collision can be enhanced. In addition, since the protective plate and the support plate can be replaced individually (for example, only the protective plate), the maintainability of the protector can be improved. Further, if both the protective plate and the support plate are made of sheet metal, the protector can be easily formed.

According to the electric truck of this case, the side collision safety of the batteries arranged between the frames can be ensured.

It is a top view which shows the schematic structure of the electric truck which concerns on one Embodiment. It is a perspective view of the battery unit applied to the electric truck of FIG. It is a front view of the main part of the electric truck of FIG. 1 (A arrow view of FIG. 1). It is the front view of the main part which enlarged the right side frame and the protector of FIG. It is an exploded perspective view of a protector. It is a top view which shows the positional relationship between the corner part of a battery unit, and a protector. It is the top view which showed the state near the battery unit at the time of a collision on the left side.

The electric truck according to the embodiment will be described with reference to the drawings. The following embodiments are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the following embodiments can be variously modified and implemented without departing from the purpose thereof. In addition, it can be selected as needed or combined as appropriate.

[1. Constitution]
As shown in FIG. 1, the vehicle 1 includes a rudder frame 2, a cab 3, a packing box 4, a wheel mechanism 5, a drive unit 6, a drive power supply unit 7, a battery unit 8, and a support device 9 for supporting the battery unit 8. It is an electric truck provided with a protector 10 for protecting the battery unit 8. Hereinafter, the front-rear direction X, the left-right direction Y, and the up-down direction Z are determined with reference to the vehicle 1. Further, the front-rear direction X is also referred to as a vehicle length direction X, the left-right direction Y is also referred to as a vehicle width direction Y, and the vertical direction Z is also referred to as a vehicle height direction Z. Further, a collision on the left side or the right side (side) of the vehicle 1 is called a side collision. In FIG. 1, the cab 3 and the packing box 4 are passed through and shown by a broken line.

The vehicle 1 is assumed to be an electric vehicle equipped with an electric vehicle (motor 6a described later) as a driving drive source for traveling, but instead of this, a hybrid vehicle further equipped with an engine may be used.

The ladder frame 2 has a pair of left and right side frames 20 and a plurality of cross members 21. Each side frame 20 extends along the vehicle length direction X. The pair of side frames 20 are arranged parallel to each other and face each other in the vehicle width direction Y. Hereinafter, of the pair of side frames 20, one on the left side is also referred to as a left side frame 20L, and the other on the right side is also referred to as a right side frame 20R.

In the present embodiment, the plurality of cross members 21 have four cross members, a first cross member 21a, a second cross member 21b, a third cross member 21c, and a fourth cross member 21d, in order from the front, and each of them is on the left. The side frame 20L and the right side frame 20R are connected. The ladder frame 2 supports the cab 3, the packing box 4, the drive unit 6, the drive power supply unit 7, the battery unit 8, and other heavy objects mounted on the vehicle 1.

The cab 3 is a structure including a driver's seat (not shown), and is provided above the front portion of the ladder frame 2. On the other hand, the cargo box 4 is a structure in which luggage or the like carried by the vehicle 1 is loaded, and is provided above the rear portion of the ladder frame 2.

In the present embodiment, the wheel mechanism 5 includes left and right front wheels 5a located in front of the vehicle, front axles 5b as axles of the two front wheels 5a, and two rear wheels 5c located behind the vehicle and arranged on the left and right sides. , And the rear axle 5d as the axle of the rear wheel 5c. Then, the vehicle 1 according to the present embodiment travels by transmitting a driving force so that the rear wheels 5c function as driving wheels. The wheel mechanism 5 is suspended on the ladder frame 2 via a suspension mechanism (not shown).

The drive unit 6 includes a motor 6a, a deceleration mechanism 6b, and a differential mechanism 6c. The motor 6a generates the driving force required for traveling of the vehicle 1 by supplying AC power from the driving power supply unit 7, which will be described later. The reduction mechanism 6b includes a plurality of gears (not shown), decelerates the rotational torque input from the motor 6a, and outputs the rotation torque to the differential mechanism 6c. The differential mechanism 6c distributes the power input from the deceleration mechanism 6b to the left and right rear wheels 5c. That is, the drive unit 6 decelerates the drive torque of the motor 6a to a rotation speed suitable for traveling of the vehicle 1 via the deceleration mechanism 6b and the differential mechanism 6c, and transmits the drive force to the rear axle 5d. As a result, the drive unit 6 can rotate the rear wheel 5c via the rear axle 5d to drive the vehicle 1.

The drive power supply unit 7 is a PDU (power drive unit) including a so-called inverter, converts DC power supplied from the battery unit 8 into AC power and supplies it to the motor 6a, and responds to an accelerator operation on the vehicle 1. The rotation speed of the motor 6a is controlled. The drive power supply unit 7 of the present embodiment is arranged on the fourth cross member 21d.

As shown in FIG. 2, the battery unit 8 is a secondary battery unit that supplies electric power to the motor 6a as an energy source for driving the vehicle 1. Specifically, the battery unit 8 has a plurality of relatively large large-capacity battery modules (not shown) for storing the electric power required for the vehicle 1 in a metal (for example, aluminum) housing forming an outer shell. I have. Further, the battery unit 8 can also supply electric power to the power distribution unit when a plurality of electric auxiliary machines and a distribution unit for supplying electric power to them are mounted on the vehicle 1 (none of them are shown). It may be configured as follows.

The battery unit 8 is formed so that the first battery accommodating portion 8a and the second battery accommodating portion 8b, both having a substantially rectangular parallelepiped shape having the same length with respect to the vehicle length direction X, are integrated in the vehicle height direction Z. ing. A recess 8c is formed in the upper portion of the first battery accommodating portion 8a so that the second cross member 21b can be crossed and extends in the vehicle width direction Y.

The battery unit 8 having such a configuration is provided with a plurality of corner portions. In the corner portion of the battery unit 8 of the present embodiment, in the first battery accommodating portion 8a, the right front corner portion 8aFR of the battery and the left front corner portion 8aFL of the battery, which are the corner portions of the front end surface and the left and right end surfaces, and the rear end surface and the left and right end surfaces are provided. The right rear corner portion 8aRR of the battery and the left rear corner portion 8aRL of the battery, which are the corner portions of the battery, are included. Further, in the present embodiment, the concave right front corner portion 8cFR and the concave left front corner portion 8cFL, which are the corners between the front surface of the concave portion 8c and the left and right end faces of the first battery accommodating portion 8a, the rear surface of the concave portion 8c, and the first battery accommodating portion 8a. Both the concave right rear corner portion 8cRR and the concave left rear corner portion 8cRL, which are corners with the left and right end faces of the battery unit 8, are included in the corner portion of the battery unit 8.

As shown in FIG. 3, the first battery accommodating portion 8a is set to a size such that the length (width) in the vehicle width direction Y fits between the left side frame 20L and the right side frame 20R. Therefore, the battery unit 8 includes a battery (not shown) arranged between the side frames 20. On the other hand, the length (width) of the second battery accommodating portion 8b in the vehicle width direction Y is set wider than that of the first battery accommodating portion 8a. The second battery accommodating portion 8b is connected below the first battery accommodating portion 8a.

That is, the battery unit 8 has a shape in which the cross-sectional shape in a plane perpendicular to the vehicle length direction X is an inverted T shape. Then, the battery unit 8 is arranged so that the side frame 20 passes through a stepped portion generated by the difference in width between the first battery accommodating portion 8a and the second battery accommodating portion 8b. As a result, in the vehicle 1, the capacity of the battery in the battery unit 8 is secured by effectively utilizing the space between the left side frame 20L and the right side frame 20R and below the side frame 20.

The battery unit 8 is connected to the side frame 20 via the support device 9 on the battery side surface 8bS, which is the outer surface of the second battery accommodating portion 8b in the vehicle width direction Y. In the present embodiment, the support devices 9 are provided at three locations in the vehicle length direction X with respect to the battery side surface 8bS on one side, and at six locations in total on both sides. However, the quantity of the support device 9 can be appropriately changed according to the weight and dimensions of the battery unit 8.

The support device 9 has a frame-side bracket 9a, an elastic connecting portion 9b, and a battery-side bracket 9c, and elastically suspends the battery unit 8 to the ladder frame 2.

The frame side bracket 9a is a metal member connected to the side surface of the side frame 20 in the vehicle width direction Y, that is, the outer surface of the side frame 20 with a plurality of bolts (not shown). Specifically, the back surface of the frame side bracket 9a is in contact with the side frame 20, the bottom surface protrudes outward from the lower portion of the back surface in the vehicle width direction Y, and the elastic connecting portion 9b is connected to the bottom surface. The frame-side bracket 9a has a pair of substantially right-angled triangular side surfaces that are orthogonal to both the back surface and the bottom surface and are continuous with both.

The elastic connecting portion 9b is a connecting member that elastically connects the frame-side bracket 9a and the battery-side bracket 9c. For example, the elastic connecting portion 9b is connected to the ladder frame 2 in which a so-called rubber bush is interposed between the frame-side bracket 9a and the battery-side bracket 9a and is connected via the frame-side bracket 9a and the battery-side bracket 9c. It absorbs the stress caused by the relative displacement with the battery unit 8.

The battery-side bracket 9c is a metal member protruding outward from the battery side surface 8bS in the vehicle width direction, and suspends the battery unit 8 by being connected to the elastic connecting portion 9b.

The protector 10 is provided on the side frame 20. As shown in FIG. 4 in detail, each side frame 20 includes a web 20a extending along the vehicle length direction X and the vehicle height direction Z, and flanges 20b and 20c provided at both upper and lower ends of the web 20a. .. Hereinafter, when the flanges 20b and 20c are distinguished from each other, one extending inward in the vehicle width direction Y from the upper end (upper side) of the web 20a is also referred to as an upper flange 20b, and is from the lower end (lower side) of the web 20a to the vehicle width direction Y. The other extending inward is also referred to as a lower flange 20c. As described above, the side frame 20 has a U-shaped cross section (substantially C-shaped cross section) opened inside in the vehicle width direction Y.

The protector 10 is arranged between the web 20a of the side frame 20 and the battery side surface 8aS which is the outer surface of the first battery accommodating portion 8a of the battery unit 8 in the vehicle width direction Y. The protector 10 has a protective plate 11 and a support plate 12, both of which are made of sheet metal. The protective plate 11 and the support plate 12 are fastened to each other with bolts 13 and nuts 14. Further, the support plate 12 is fastened to the web 20a of the side frame 20 by bolts 15 and nuts 16. As a result, the protector 10 is fixed to the side frame 20.

The support plate 12 of the present embodiment has a hat-shaped cross section perpendicular to the vehicle length direction X. The support plate 12 has an outer plate portion 12a fixed to the central portion of the web 20a of the side frame 20 in the vehicle height direction Z and two inner plate portions arranged inside the vehicle width direction Y with respect to the outer plate portion 12a. It has a 12b and two connecting portions 12c that connect the outer plate portion 12a and the two inner plate portions 12b, respectively.

Both the outer plate portion 12a and the inner plate portion 12b are provided so as to be substantially parallel to the web 20a of the side frame 20. On the other hand, the connecting portion 12c is provided so as to be perpendicular to each of the outer plate portion 12a and the inner plate portion 12b, and extends along the vehicle length direction X and the vehicle width direction Y.

The support plate 12 has a plurality of through holes 12d formed in the outer plate portion 12a and a plurality of through holes 12e formed in each inner plate portion 12b. A nut 16 arranged coaxially with the through hole 12d is welded to the inside of the outer plate portion 12a in the vehicle width direction Y. Further, a nut 14 arranged coaxially with the through hole 12e is welded to the outside of the inner plate portion 12b in the vehicle width direction Y.

The support plate 12 has a bolt whose outer plate portion 12a is contacted with the web 20a of the side frame 20 from the inside in the vehicle width direction Y and then inserted into the through hole 12d from the outside in the vehicle width direction Y of the side frame 20. 15 is fixed to the side frame 20 by being fastened to the nut 16.

The two inner plate portions 12b are arranged apart from each other in the vehicle height direction Z, and are located above and below the outer plate portion 12a, respectively. The two connecting portions 12c are also arranged apart from each other in the vehicle height direction Z, and are located above and below the outer plate portion 12a, respectively. The upper connecting portion 12c connects the upper edge portion of the outer plate portion 12a and the lower edge portion of the upper inner plate portion 12b. Further, the lower connecting portion 12c connects the lower edge portion of the outer plate portion 12a and the upper edge portion of the lower inner plate portion 12b.

As shown in FIGS. 4 and 5, the protective plate 11 has a substantially flat plate shape and is arranged along the vehicle length direction X and the vehicle height direction Z. The protective plate 11 has a substantially planar battery protective surface 11a facing the battery unit 8. The battery protection surface 11a is provided so as to be substantially parallel to the web 20a of the side frame 20. Here, a battery protection surface 11a arranged with a gap with respect to the battery side surface 8aS of the first battery accommodating portion 8a is illustrated.

In the present embodiment, the position Y1 of the battery protection surface 11a in the vehicle width direction Y is inside the vehicle width direction Y with respect to the tip (end) position Y2 of the flanges 20b and 20c of the side frame 20. That is, the battery protection surface 11a is located closer to the first battery accommodating portion 8a of the battery unit 8 than the side frame 20.

Both the upper edge portion 11b and the lower edge portion 11c of the protective plate 11 are bent outward in the vehicle width direction Y, and are provided outside the vehicle width direction Y with respect to the battery protection surface 11a. Here, the upper edge portion 11b and the lower edge portion 11c extending slightly outward in the vehicle width direction Y from the tip positions Y2 of the flanges 20b and 20c of the side frame 20 are exemplified.
The upper edge portion 11b of the protective plate 11 is arranged between the upper flange 20b of the side frame 20 and the upper end portion of the support plate 12. Further, the lower edge portion 11c of the protective plate 11 is arranged between the lower flange 20c of the side frame 20 and the lower edge portion of the support plate 12.

The protective plate 11 of the present embodiment has a notch 11d at the center of the vehicle height direction Z for passing a member such as a wire, a pipe, or a tube (hereinafter, simply referred to as a wire or the like). As shown in FIG. 5, here, a semicircular notch 11d formed in each of the leading edge portion and the trailing edge portion of the protective plate 11 is illustrated.

The protective plate 11 has a plurality of through holes 11h through which the bolts 13 are inserted, and a recessed portion 11e in which the periphery of each through hole 11h is recessed in a circular shape toward the outside in the vehicle width direction Y. Through holes 11h are provided at both ends of the battery protection surface 11a in the vehicle height direction Z. The recessed portion 11e forms a space for accommodating the head portion 13a of the bolt 13 inserted through the through hole 11h.

The protective plate 11 is coupled to the support plate 12 by fastening the bolt 13 inserted into the through hole 11h and the through hole 12e of the inner plate portion 12b of the support plate 12 from the inside in the vehicle width direction Y to the nut 14. To. As shown in FIG. 4, when the protective plate 11 and the support plate 12 are coupled to each other, the head portion 13a of the bolt 13 is arranged so as not to protrude inside the battery protective surface 11a in the vehicle width direction Y.

In the protector 10, the support plate 12 has the outer plate portion 12a, the inner plate portion 12b, and the connecting portion 12c, so that both ends of the battery protective surface 11a of the protective plate 11 in the vehicle height direction Z and the web of the side frame 20 are provided. It is connected to the central portion of the vehicle height direction Z in 20a. Thereby, the support plate 12 supports the protection plate 11.

The protector 10 defines three spaces S1, S2, and S3 arranged in the vehicle height direction Z between the flanges 20b and 20c of the side frame 20 of the present embodiment. Specifically, the space S1 between the upper flange 20b and the upper connecting portion 12c, the space S2 between the two connecting portions 12c, and the space between the lower connecting portion 12c and the lower flange portion 20c. S3 is provided. These spaces S1, S2, and S3 can be used as placement spaces for wires and the like.

In the protector 10, three regions R1, R2, and R3 of the protective plate 11 that do not overlap with the connecting portion 12c of the support plate 12 in the vehicle width direction Y are relatively deformed with respect to the input in the vehicle width direction Y. Cheap. That is, in the protective plate 11, the upper region R1 above the upper connecting portion 12c, the middle region R2 between the two connecting portions 12c, and the lower region R3 below the lower connecting portion 12c are formed. , It is more easily deformed at the time of side collision than the region overlapping with the connecting portion 12c in the vehicle width direction Y view. In particular, since the upper region R1 and the lower region R3 have a structure like a cantilever whose upper end and lower end are free ends, the free end side is easily deformed with respect to the input in the vehicle width direction Y.

As described above, the protector 10 has a shape in which the protective plate 11 and the support plate 12 are easily deformed with respect to the input in the vehicle width direction Y. The protector 10 can absorb the collision energy at the time of a side collision due to the deformation of the protection plate 11 and the support plate 12. Therefore, the protector 10 has the protective plate 11 and the support plate 12 which are easily deformed as described above, so that the energy absorption at the time of side collision is enhanced. The energy absorption of the protector 10 can be adjusted by changing the material (strength, rigidity, etc.) and the plate thickness of the protective plate 11 and the support plate 12. In other words, the material and thickness of the protective plate 11 and the support plate 12 are appropriately selected so as to secure the energy absorption required for the protector 10.

The position of the protector 10 in the vehicle height direction Z is preferably set so that the connecting portion 12c of the support plate 12 does not overlap with the upper surface of the battery unit 8 in the vehicle width direction Y. In the present embodiment, the protector 10 with respect to the battery unit 8 is located between the two connecting portions 12c of the support plate 12 so that the upper surface 8aU of the first battery accommodating portion 8a of the battery unit 8 is located between the two connecting portions 12c of the support plate 12 in the vehicle width direction Y view. The position of Z in the vehicle height direction is set. That is, the protector 10 is arranged so that the middle region R2 of the protective plate 11 overlaps the upper surface 8aU of the first battery accommodating portion 8a in the vehicle width direction Y view.

The protector 10 is arranged so that the battery protection surface 11a of the protection plate 11 faces the corner portion of the battery unit 8 in the vehicle width direction Y. As shown in FIG. 6, in the vehicle 1 of the present embodiment, six protectors 10 are arranged corresponding to the corners of the battery unit 8.

Specifically, the right front protector 10FR and the left front protector 10FL are arranged at positions facing the battery right front corner portion 8aFR and the battery left front corner portion 8aFL in the vehicle width direction Y. Further, the right rear protector 10RR and the left rear protector 10RL are arranged at positions facing the battery right rear corner portion 8aRR and the battery left rear corner portion 8aRL in the vehicle width direction Y. Further, the right center protector 10MR and the left center protector 10ML are arranged at positions facing the concave right rear corner portion 8cRR and the concave left rear corner portion 8cRL in the vehicle width direction Y.

That is, in the rudder frame 2 of the vehicle 1, the front region is the front region FA and the rear region is the rear region RA with respect to the battery region BA in which the battery unit 8 is provided in the vehicle length direction X. The right front protector 10FR and the left front protector 10FL are arranged so as to intervene in the battery area BA and the front area FA, and the right rear protector 10RR and the left rear protector 10RL are arranged so as to intervene in the battery area BA and the rear area RA.

[2. Action and effect]
In the vehicle 1 configured in this way, the protector 10 hits the corner portion of the battery unit 8 against the frame deformation caused by the occurrence of the side collision. As shown in FIG. 7, when the vehicle 1 is impacted from the left side, the side frame 20 is moved to the front position of the second cross member 21b, which has relatively low rigidity against the side collision, or near the rear portion of the battery unit 8. Deformation occurs.

Specifically, in the left side frame 20L, the fixed portion of the left front protector 10FL is deformed in a direction away from the battery left front corner portion 8aFL, and the fixed portion of the left rear protector 10RL is separated from the battery left rear corner portion 8aRL. Deforms in the direction. On the other hand, in the right side frame 20R, the fixed portion of the right front protector 10FR is deformed in the direction approaching the battery right front corner portion 8aFR, and the fixed portion of the right rear protector 10RR is deformed in the direction approaching the battery right rear corner portion 8aRR. do. As a result, the right front protector 10FR and the battery right front corner portion 8aFR come into contact with each other, and the right rear protector 10RR and the battery right rear corner portion 8aRR also come into contact with each other.

In the vehicle 1, since the corner portion of the battery unit 8 and the battery protection surface 11a of the protection plate 11 of the protector 10 are arranged so as to face each other in the vehicle width direction Y, the battery unit 8 is arranged at the time of a side collision as described above. The corners are likely to come into contact with the battery protection surface 11a. As a result, the physical input to the corner of the battery unit 8 acts at a point (for example, the tip of the flanges 20b and 20c of the side frame 20 becomes the input point to the battery unit 8). Since it is received as a whole, the physical input to the battery unit 8 can be reduced.

Further, in the protector 10, both ends of the battery protection surface 11a of the protection plate 11 in the vehicle height direction Z and the central portion of the web 20a of the side frame 20 in the vehicle height direction Z are connected by the support plate 12 to protect the protector 10. The plate 11 and the support plate 12 can be easily deformed. For example, since the middle region R2 of the protective plate 11 is not connected to the support plate 12, it can be easily deformed at the time of contact with the corner portion of the battery unit 8 to absorb the collision energy. Further, in the protective plate 11 and the support plate 12 of the present embodiment, the upper region R1 and the lower region R3, which have a structure like a cantilever, are easily deformed at the time of contact with the corner portion of the battery unit 8 and collide energy. Can be absorbed.

As described above, in the protector 10, since the protective plate 11 and the support plate 12 are easily deformed, the collision energy can be satisfactorily absorbed by the deformation of the protective plate 11 and the support plate 12. Therefore, the input to the battery unit 8 can be further reduced. Therefore, the side collision safety of the batteries arranged between the frames can be ensured.

Further, in the protector 10, the space S2 between the protective plate 11 and the support plate 12 and the spaces S1 and S3 between the side frame 20 and the support plate 12 can be used as a wiring space for wires and the like. Further, at the time of a side collision, the protector 10 enhances the protection of the wires and the like arranged in the spaces S1, S2, and S3.

In addition, since the protective plate 11 and the support plate 12 are formed separately from each other, for example, if only the protective plate 11 is deformed due to contact with the corner portion of the battery unit 8, only the protective plate 11 is replaced. The support plate 12 can continue to be used. As described above, in the protector 10, the protective plate 11 and the support plate 12 can be individually replaced, so that the maintainability can be improved.

Further, the protector 10 of the present embodiment is easy to mold because both the protective plate 11 and the support plate 12 are made of sheet metal.
Further, since the protective plate 11 of the present embodiment is provided with the notch 11d, the wire can be easily routed by passing the wire or the like through the notch 11d.

In the protective plate 11 of the present embodiment, since the upper edge portion 11b and the lower edge portion 11c are both bent outward in the vehicle width direction Y, the upper edge portion 11b and the lower edge portion 11c are the battery unit 8 at the time of side collision. It is possible to avoid contacting the corners of the car. As a result, the corner portion of the battery unit 8 is more reliably brought into contact with the battery protection surface 11a, so that the input to the battery unit 8 can be reduced more reliably.

Further, in the protective plate 11 of the present embodiment, since the head portion 13a of the bolt 13 is accommodated in the recessed portion 11e recessed toward the outside in the vehicle width direction Y, the head portion 13a of the bolt 13 is accommodated at the time of side collision. Contact with the corners of the battery unit 8 can be suppressed. This also ensures that the corners of the battery unit 8 are brought into contact with the battery protection surface 11a, so that the input to the battery unit 8 can be reduced more reliably.

Further, since the protector 10 is arranged so as to face the battery right front corner portion 8aFR, the battery left front corner portion 8aFL, the battery right rear corner portion 8aRR, and the battery left rear corner portion 8aRL, the protector 10 and the battery unit 8 are arranged at the time of side collision. The protector 10 will be arranged in the range where it is most likely to come into contact. As a result, the protection of the battery unit 8 at the time of side collision can be further stably enhanced.

In addition, when the battery unit 8 is formed with the recess 8c across which the second cross member 21b is formed as in the present embodiment, the position facing the recess right rear corner portion 8cRR and the recess left rear corner portion 8cRL is also formed. If the right center protector 10MR and the left center protector 10ML are provided, the protection of the battery unit 8 can be enhanced even if the side frame 20 is deformed in a more complicated manner.

Further, since the protector 10 is arranged so as to intervene between the battery area BA and the front area FA, and the battery area BA and the rear area RA, the battery right front corner portion 8aFR, the battery left front corner portion 8aFL, and the battery right at the time of side collision. The rear corner portion 8aRR and the left rear corner portion 8aRL of the battery are more reliably brought into contact with the battery protection surface 11a.

Further, in the protector 10 of the present embodiment, since the battery protection surface 11a is located inside the vehicle width direction Y with respect to the tips of the flanges 20b and 20c of the side frame 20, it precedes the side frame 20 at the time of side collision. The battery protection surface 11a can be brought into contact with the battery unit 8. As a result, the protective plate 11 is deformed before the side frame 20 to absorb the collision energy, so that the input to the battery unit 8 can be reduced more reliably.

Further, the battery unit 8 of the present embodiment is formed by a first battery accommodating portion 8a located between the side frames 20 and a second battery accommodating portion 8b located below the side frame 20. The protector 10 can reduce the physical input to the first battery accommodating portion 8a at the time of side collision while effectively utilizing the space between the frames 20 and the space below the side frame 20 to increase the battery accommodating capacity.

[3. Modification example]
The position Y1 of the battery protection surface 11a in the vehicle width direction Y may be the same as the tip position Y2 of the flanges 20b and 20c of the side frame 20, or is inside the vehicle width direction Y of these tip positions Y2. You may. In such a configuration, the side frame 20 may come into contact with the corner portion of the battery unit 8 before the battery protection surface 11a at the time of side collision. However, immediately thereafter, by contacting the corner portion of the battery pack 8 with the battery protection surface 11a, the physical input to the battery pack 8 can be reduced as in the above embodiment.

Each shape of the protection plate 11 and the support plate 12 shown in the above embodiment is an example. The notch 11d may be omitted from the protective plate 11, or the upper edge portion 11b and the lower edge portion 11c may be directed upward and downward, respectively. The method of fixing the protective plate 11 and the support plate 12 is not limited to the method using the bolt 13 and the nut 14 as described above. Further, the method of fixing the protector 10 to the side frame 20 is not limited to the method using the bolt 15 and the nut 16 as described above.

The vehicle 1 may be provided with at least one protector 10. That is, the protector 10 may be arranged so that the battery protection surface 11a faces at least one corner of the battery unit 8.
The battery unit 8 may be configured such that the drive power supply unit 7 is integrally provided inside or outside the housing. Further, the battery unit 8 is not limited to the one having an inverted T-shaped cross section as described above, and may have another shape such as a rectangular parallelepiped or a cube.

1 Vehicle (electric truck)
2 Ladder frame 3 Cab 4 Packing box 5 Wheel mechanism 5a Front wheel 5b Front axle 5c Rear wheel 5d Rear axle 6 Drive unit 6a Motor 6b Deceleration mechanism 6c Differential mechanism 7 Drive power supply unit 8 Battery unit 8a 1st battery housing 8aFL Battery Left front corner 8aFR Battery right front corner 8aRL Battery left rear corner 8aRR Battery right rear corner 8aS Battery side 8aU Top surface 8b Second battery housing 8bS Battery side 8c Recess 8cFL Recess left front corner 8cFR Recess right front corner 8cRL Corner 8cRR Recess Right rear corner 9 Support device 9a Frame side bracket 9b Elastic connection part 9c Battery side bracket 10 Protector 10FL Left front protector 10FR Right front protector 10ML Left center protector 10MR Right center protector 10RL Left rear protector 10RR Right rear protector 11a Battery protection surface 11b Upper edge 11c Lower edge 11d Notch 11e Indentation 11h Through hole 12 Support plate 12a Outer plate 12b Inner plate 12c Connecting 12d Through hole 12e Through hole 13 Bolt 13a Head 14 Nut 15 Bolt 16 Nut 20 Side frame 20a Web 20b Upper flange (flange)
20c Lower flange (flange)
20R Right side frame 20L Left side frame 21 Cross member 21a 1st cross member 21b 2nd cross member 21c 3rd cross member 21d 4th cross member BA Battery area FA Front area R1 Upper area R2 Middle area R3 Lower area RA Rear area S1 , S2, S3 Space X Vehicle length direction Y Vehicle width direction Y1 Battery protection surface 11a position Y2 Flange 20b, 20c tip position Z Vehicle height direction

Claims (1)

An electric truck having a rudder frame in which a pair of side frames each comprising a web and flanges provided at both ends of the web face each other in the vehicle width direction.
A battery unit including a battery arranged between the pair of side frames and
A protective plate having a battery protective surface provided so as to face the battery unit and substantially parallel to the web, both ends of the battery protective surface in the vehicle height direction, and a central portion in the vehicle height direction of the web. Includes a support plate that supports the protective plate by coupling, and a protector having.
The protector is an electric truck characterized in that at least one corner of the battery unit and the battery protection surface are arranged so as to face each other in the vehicle width direction.

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