JPH10250382A - Rear body structure of bus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the rear body structure of a bus excellent in a vehicular weight distribution and a production workability which can restrain a vibration and the noise on a room end improve a comfortable ride. SOLUTION: This rear part structure has a support member 30 for supporting a power unit constructed between a rear end frame 29 and front end frame 23, a rear pillar 24 joined to both ends of the front end frame 29, a rear end pillar 25 joined to the rear end frame 29, sub-frames 27a, 27b... constructed between the rear pillar 24 and the rear end pillar 25 and a vertical support member 33 for connecting the center part of the rear end frame 29 to a rear member 35. The front end frame 23 and the rear end frame 29 are integrally formed by the support member 30, rear pillar 24, rear end pillar 25, sub-frames 27a, 27b..., rear member 35 and vertical support member 33 and the load of the power unit is dispersed and supported to the front end frame 23 and rear end frame 29 improved their rigidity and the vibration and noise caused by the power unit is reduced and a comfortable ride is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear body structure of a vehicle, and more particularly to a rear body structure of a bus on which a power unit such as an engine and a transmission is mounted at the rear of the vehicle body.

[0002]

2. Description of the Related Art For example, in a bus or the like, a power unit such as an engine and a transmission is mounted on a rear portion of a vehicle body in the width direction of the vehicle body, that is, in a horizontal direction, for the purpose of improving comfort and running performance within a limited total vehicle body length. Vehicles have been developed that are arranged to drive the rear wheels.

[0003] As a prior art of a vehicle body rear structure in which a power unit such as an engine and a transmission is laterally arranged at the rear of the vehicle body, there is Japanese Utility Model Publication No. 4-28823.

In this prior art, as shown in FIG. 12, an engine 101, a clutch device 102, and a transmission 103 are sequentially arranged laterally at a rear portion of a vehicle body, and a transfer 104 is connected to an output end of the transmission 103 located near a side wall of the vehicle body. Then, the transfer output shaft 105 is rotationally driven, and the inner end of the transfer output shaft 105 is connected to a propeller shaft 106 arranged in the front-rear direction of the vehicle by a diverter 107 for changing the power transmission direction. A power unit that connects a shaft 106 to a rear wheel driving differential 108 to drive a rear wheel 109 is disclosed.

An engine 10 mounted on the rear of the vehicle body
1, clutch device 102, transmission 103,
Power units such as the transfer 104 and the diverter 107 are connected to a front end cross member 111 and a rear end cross member 112.
And a plurality of engine bed members 113 connecting them
The support frame 110 formed by the
5 as a separate structure from the support frame 110 in advance.
After the power units such as the engine 101, the clutch device 102, the transmission 103, the transfer 104, and the diverter 107 are assembled to the vehicle body, the power units are inserted from below the vehicle body and assembled to the vehicle body frame 115 with a plurality of bolts.

[0006]

According to the prior art described above, after a power unit such as an engine, a clutch device, a transmission, a transfer, and a diverter is previously assembled to a support frame, the support frame is fixed to a vehicle body frame. Workability during manufacturing can be improved.

However, since the load of the power unit is supported by a pair of cross members that are cantilevered to the body frame, the load acting on these cross members, especially the rear end cross member, increases and is input to the body frame or the like. This increases vibration and reduces ride comfort and increases indoor noise, and is not desirable in terms of body rigidity. To improve the rigidity of the body frame and cross members, etc. Increases,
There is an inconvenience that the weight of the entire vehicle body is biased rearward.

In particular, in the case of a large-sized bus, the power unit such as the engine becomes large and heavy, and since various frames and the like are arranged, it is difficult to insert and install a support frame having the power unit assembled from below. There are inconveniences such as not being excellent in workability.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the foregoing, and it is an object of the present invention to improve vehicle weight distribution, suppress vibration and indoor noise, improve ride comfort, and improve vehicle body rigidity. It is an object of the present invention to provide a rear body structure of a bus which is improved in manufacturing efficiency and excellent in workability.

[0010]

A bus body rear structure according to the present invention which achieves the above object is provided with a front end frame fixed to a rear end of a vehicle body frame extending in a vehicle front-rear direction and extending in a vehicle width direction, and A rear end frame is provided to extend in the vehicle width direction at a distance from the front end frame to the rear of the vehicle body, and a power unit is horizontally disposed between the front end frame and the rear end frame. A support member erected between the front end frame and supporting the power unit, rear pillars respectively coupled to both ends of the front end frame, and rear end pillars respectively coupled to the rear pillars at both ends of the rear end frame, A plurality of subframes installed between the rear pillars and the rear end pillars, and a central portion in the vehicle width direction of the rear end frame is a rear surface. And having a vertical support member connecting the wood.

Accordingly, the front end frame and the rear end frame connected to the vehicle body frame are integrally formed by the support member, the rear pillar, the rear end pillar, the subframe, the rear surface member, the vertical support member, and the like, and the load of the power unit is integrated. The vibration and noise due to the power unit are reduced and supported by the front end frame and the rear end frame, which have improved rigidity, and the riding comfort is improved.

Further, by arranging the sub-frames in a ladder shape, it is possible to function as a ladder to improve the efficiency of inspection and other operations.

Further, by providing the above-mentioned components such as the rear end frame and the sub-frame in a detachable manner, the work of attaching and detaching the power unit and the like can be facilitated by removing these components.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a rear body structure of a bus according to the present invention.

FIG. 1 is an overall side view of the bus 1, and FIG. 2 is a perspective view of an essential part for explaining a floor structure of the bus 1.

The bus 1 is a so-called non-step bus which is of a low floor type having a lowered floor surface in order to make it easy to get on and off, and is provided with an ascending and descending slope by eliminating an ascending and descending step.

As shown in a perspective view of FIG. 2, the floor 10 of the bus 1 has a passage 11 formed in the center in the longitudinal direction of the vehicle body, and through this passage 11, a front wheel fender 12 and a rear wheel fender 13 Are formed to protrude into the vehicle interior so as to face each other, and a rear partition wall 14 that partitions the interior of the vehicle from the interior of the engine compartment is provided at the rear end. In addition, a passage 13 between both rear wheel fenders 13 in which a rear axle or the like is disposed below has a slope 11a that rises gently to facilitate movement of a wheelchair or the like.
Are formed.

Further, a front elevator 2, a central elevator 3, and a rear elevator 4 provided on one side of the vehicle body shown in FIG.
Front elevating slope 1 continuous with passage 11 corresponding to
5, Central lifting slope 16, Rear lifting slope 17
Are respectively formed.

The rear elevating slope 17 is provided through the passage 11.
As shown in a perspective view of a main part in FIG. 3, a propeller shaft 56, which will be described later, and an air tank 61 for adjusting the vehicle height, a main air tank 62, and an oil mist separator 63 are provided between the rear wheel fender 13 and the rear partition 14. , An air dryer 64, a preheater 65, a muffler 66, and the like are formed below the high floor portion 18, and the devices are arranged below the passage 11 by accommodating these devices below the high floor portion 18. As much as possible to ensure road clearance and lower floors. And passage 1
A plurality of seats (not shown) are provided along both sides via 1.

Rear partition 1 for partitioning the interior of the vehicle from the interior of the engine compartment
As shown in FIG. 2, an inspection port 14a for inspecting the inside of the engine chamber from inside the room is provided on the rear partition wall 14 formed in a shelf shape. A display box 19a, a computer control box 19b, a sub tank space 19c, and the like are provided.

As shown in a perspective view in FIG. 5, the inspection port 14a is provided at an opening 14b opening to the rear partition wall 14 through a packing 14c made of rubber or the like and a transparent plate 14d made of glass or plastic and openably and closably. The inspection lid 14e and the like.

As shown in the plan view of the main part in FIG. 6, a pair of opposed side frames 20 extending in the longitudinal direction of the vehicle body are provided below the floor 10 and connected to the rear end of the side frame 20 to be connected to the vehicle body. A cross beam 21 along the width direction is disposed between the rear wheel fender 13 and the rear elevating slope 17.

A front end frame 23 having a substantially L-shaped cross section is disposed in parallel behind the cross beam 21 via a rear elevating slope 17, and the cross beam 21 and the front end frame 23 are trussed by frames 22a, 22b, 22c. The truss frame 22, which is formed in a shape, is firmly connected by the side frame 20, the cross beam 21,
The body frame is formed by the truss frame 22 and the like.

Both ends of a front end frame 23 connected to the rear end of the vehicle body frame are connected to a rear pillar 24 and connected to a rear partition 14 as shown in a perspective view of a main part of the rear part of the vehicle body in FIG.

Rear end pillars 25, 26 are arranged in parallel behind the rear pillar 24. For example, the rear pillar 24 on the left side of the vehicle body and the rear end pillar 25 are integrally connected by a plurality of subframes 27a, 27b, 27c,. .

On the other hand, the rear end pillar 26 on the right side of the vehicle body is divided into an upper rear end pillar 26a and a lower rear end pillar 26b, which are divided and connected by bolts or the like as shown in a side view of a main part in FIG. Is connected integrally to the rear pillar 24 by a plurality of subframes 28a, 28b, etc., and the lower end of the lower rear end pillar 26b connected to the lower end of the upper rear end pillar 26a is connected to the lower frame 28d and the lower A lower end of the rear end pillar 26b is connected to the sub-frame 28d by a sub-frame 28c whose both ends are detachably connected by bolts or the like.

The sub-frames 28a, 28b, 28
c is arranged in a ladder shape so as to function as a ladder when ascending and descending for work such as inspection and coolant replenishment of a coolant replenishment port 58a provided at a high position of the vehicle body, which will be described later, and as shown in FIG. , 28b, 28c, a side door 67 provided with a hinge in front of the vehicle body is provided to improve workability such as inspection.

FIG. 1 is an exploded perspective view of FIG.
As shown in FIG. 0, a rear end frame 29 having both ends bolted to the lower ends of the rear end pillars 25 and 26 is disposed in parallel behind the front end frame 23, and the truss frame 22 is disposed substantially at the center of the front end frame 23 in the vehicle width direction. Frame 22
A front end side connection member 30a is provided corresponding to a, and an engine support member 31a and a transmission support member 32 are provided corresponding to the frames 22b and 22c of the truss frame 22 apart from the front end side connection member 30a.

At a substantially central portion in the vehicle width direction of the rear end frame 29, a front end side connecting member 30 provided on the front end frame 23 is provided.
The rear end side connecting member 30b is detachably provided by bolts or the like facing the a, and the engine supporting member 31b is provided facing the engine supporting member 31a.

The front end side connecting member 30a and the rear end side connecting member 3
0b, a support member 30 is detachably mounted with bolts or the like, and an engine 51, a clutch device 52, a transmission 53, and the like are integrally and sequentially integrated with the support member 30 via an engine mount cushion rubber (not shown). A power unit 50, which is assembled horizontally and arranged, is mounted so as to support the position of the center of gravity from below, and the ends of the engine 51 are supported by the front end frame 23 and the rear end frame 29 by engine support members 31a and 31b, respectively. doing.

The transmission 53 is supported on the front end frame 23 by the transmission support member 32,
The vibration of the transmission 53, particularly the vibration in the vehicle longitudinal direction, is efficiently transmitted to the truss frame 22 to suppress the vibration of the transmission 53.

The upper end of the rear end side connecting member 30b is detachably provided at the lower end of the vertical support member 33 by a bolt or the like.
The vertical support member 33 is connected to a plurality of cross beams 34 connected to a rear member 35 and a side member (not shown).

The front end side connection member 30a and the rear end side connection member 3
0b, an output end of the transmission 53 of the power unit 50 mounted via the support member 30 or the like is provided with a diverter 55 for changing the power transmission direction, and the motive power from the transmission 53 is transmitted to the engine via the diverter 55. Power is transmitted to a propeller shaft 56 that is disposed below the raised floor portion 18 from a side end in the chamber and is connected to a rear wheel drive differential (not shown) to transmit power.

A coolant reserve tank (see FIG. 3) corresponding to the radiator 57 and the coolant replenishing port 58a via a mounting member (not shown) is opposed to the right side of the vehicle body above the power unit 50 disposed horizontally in the engine chamber. (Not shown), an air cleaner (not shown) is provided on the left side of the vehicle body, and a power unit 50 and a radiator 5 are provided.
7. By arranging the coolant reserve tank, the air cleaner, and the like in the vertical position, the longitudinal direction of the vehicle body in the engine chamber is shortened, and the longitudinal length in the vehicle compartment is secured.

Further, the cooling air from the radiator 57 flows in the engine chamber, and after cooling the engine 51, flows out from below the engine chamber, thereby improving the cooling efficiency of the engine 51.

A substantially rectangular opening 3 is provided above the rear member 35.
11, a packing 37, for example, a H-rubber, is fitted with a rear panel 38 in the opening 36, and a rear glass 40 is disposed above the rear panel 38 via a packing 39, as shown in a rear view of the vehicle body in FIG. 11. A radiator inspection lid 41 and an inspection lid 42 such as an air cleaner are provided below the rear glass 40.

Then, the engine 51 and the clutch device 5
2. The work of attaching and detaching the power unit 50 in which the transmission 53 and the like are integrally assembled is sequentially and detachably supported by the front end frame 23 and the rear end frame 28 via the front end and rear end side connection members 30a and 30b, respectively. The support member 30, the both ends are detachably connected to the lower ends of the rear end pillars 25 and 26, and the center portion is detachably connected to the lower end of the rear end connection member 30b. The rear end frame 29, the lower rear end pillar 2
6b and sub-frame 28d connected to rear pillar 24
The lower frame 28c detachably coupled to the lower rear end pillar 26b detachably coupled to the upper rear end pillar 25a and the lower rear end side connection member 30b detachably coupled to the lower end of the vertical support member 33 are removed. It is easily performed using a forklift or the like from the rear side of the vehicle body where the side, rear, and lower sides are largely open.

According to the present embodiment configured as described above, the front end frame 23 and the rear end frame 29 are composed of the support member 30, the vertical support member 33, and the cross member provided between the front end frame 23 and the rear end frame 29. The beam 34, the rear member 35, the side member rear end pillars 25 and 26, the rear pillar 24 and the plurality of subframes 27a, 27b,.
Are formed integrally with each other via the truss frame 22, the cross beam 21, the side frame 20, etc., to secure high rigidity.

The power unit 50 mounted between the front end frame 23 and the rear end frame 29 by the support member 30
Load mainly from the support member 30 to the front end side connection member 30a.
In addition, the load from the power unit 50, which is dispersed and transmitted to the front end frame 23 and the rear end frame 29 via the rear end side connection member 30b, and is input to the front end frame 23, is connected to the truss integrally connected to the front end frame 23. Frame 2
It is reliably received by the vehicle body frame member such as 2.

On the other hand, from the supporting member 30 to the rear end side connecting member 3
0b, the load from the power unit 50 transmitted to the rear end frame 29 is transmitted from the vertical support member 33 to the rear surface member 35 and the side surface members via a plurality of cross beams 34, and the rear end pillars 25, 26
4. While being firmly received by the body frame members integrally joined together such as the front end frame 23 and the truss frame 22, the rear end pillars 2 are provided from both ends of the rear end frame 29.
5, 26, and a plurality of subframes 27a, 27
, 28a, 28b, 28c,... are input to the rear pillar 24 and are reliably received by the body frame members such as the front end frame 23 and the truss frame 22.

Accordingly, the load of the power unit 50 is distributed to the front end frame 23 and the rear end frame 29 formed as an integral structure, so that the vibration and noise caused by the power unit 50 are reduced, the riding comfort is improved, and the plate thickness and the like are improved. It is not necessary to take measures such as increasing the rigidity of the rear end frame 29 by increasing the weight of the rear end frame 29, and the likelihood of an increase in the weight of the entire vehicle body and the possibility that the weight is shifted rearward is avoided, and the vehicle weight distribution is excellent. Having.

Further, the front end frame 23 and the rear end frame 2
The present invention is not limited to the above-described embodiment, such as arranging a plurality of support members 30 laid between the support members 9 to support the load of the power unit 50, and various changes can be made without departing from the gist of the present invention.

[0043]

According to the rear body structure of the bus of the present invention described above, the front frame, the rear frame, and both ends connected to the body frame are connected to the front frame by a plurality of sub-frames, and the center portion is formed by the vertical member. The front frame and the rear frame are integrally formed with the front frame and supported by the rear member to increase rigidity without increasing the thickness of the rear frame and the like, and the load of the power unit is improved with the rigidity of the front frame and rear end Vibration and noise due to the power unit are reduced and supported by the frame, which reduces vibration and noise, improves ride comfort and is excellent in vehicle weight distribution. Are obtained, and the effect unique to the present invention is obtained.

[Brief description of the drawings]

FIG. 1 is an overall side view of a bus illustrating an embodiment of a rear body structure of the bus according to the present invention.

FIG. 2 is a perspective view of an essential part for explaining the floor structure of the embodiment.

FIG. 3 is a perspective view of an essential part for explaining the present embodiment.

FIG. 4 is a perspective view of an essential part showing an upper part of a rear partition wall for explaining the present embodiment.

FIG. 5 is a perspective view of an essential part of an inspection port for explaining the embodiment.

FIG. 6 is also a plan view of a principal part for explaining the present embodiment.

FIG. 7 is a perspective view of a main part of a rear portion of the vehicle body, similarly illustrating the present embodiment.

FIG. 8 is a side view of the principal part for explaining the present embodiment.

FIG. 9 is a side view of the principal part for explaining the present embodiment.

FIG. 10 is an exploded perspective view of a principal part for explaining the present embodiment.

FIG. 11 is also a rear view of the vehicle body illustrating the embodiment.

FIG. 12 is a plan view illustrating a conventional body rear structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bus 20 Side frame 21 Cross beam 22 Truss frame 23 Front end frame 24 Rear pillar 25 Rear end pillar 26 Rear end pillar 26a Upper rear end pillar 26b Lower rear end pillar 27a, 27b, 27c ... Subframe 28a, 28b, 28c ... Subframe 29 rear end frame 30 support member 30b rear end side connection member 33 vertical support member 35 rear surface member 50 power unit

Claims (5)

[Claims] 1. A front end frame fixed to a rear end of a vehicle body frame extending in the vehicle front-rear direction and extending in the vehicle width direction, and a rear end frame spaced apart from the front end frame in a vehicle rear direction and extending in the vehicle width direction is provided. A power unit disposed laterally between the front end frame and the rear end frame, a support member erected between the rear end frame and the front end frame to support the power unit; A rear pillar respectively connected to both ends of the frame, a rear end pillar respectively connected to both ends of the rear end frame so as to face the rear pillar, a plurality of sub-frames installed between the rear pillar and the rear end pillar, A vertical support member for connecting a center portion of the rear end frame in the vehicle width direction to a rear member, and a rear body of the bus Part structure. 2. A rear body structure of a bus according to claim 1, wherein said plurality of sub-frames are arranged in a ladder shape. 3. The apparatus according to claim 1, wherein the support member is detachably connected to the rear end frame and the front end frame, and the rear end frame is detachably connected to the rear end pillar and the vertical support member. Or the rear body structure of the bus according to 2. 4. A lower portion of at least one of the rear end pillars is configured to be detachable, an end of a rear end frame is detachably connected to the lower rear end pillar, and a subframe is detachably mounted between the rear pillar and the lower rear end pillar. 4. The rear body structure of a bus according to claim 3, wherein the rear body is provided so as to be able to be installed. 5. The rear body structure of a bus according to claim 1, wherein the rear end frame and the vertical support member are detachably connected via a rear end side connecting member.