JP4478542B2 - Vehicle body frame structure - Google Patents

Description

  The present invention relates to an improvement in a vehicle body frame structure of a vehicle.

As a conventional vehicle body frame structure, a vehicle body frame that is divided into three front and rear parts is known (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 1-168884

Patent Document 1 will be described below. In addition, about the code | symbol, what was described in the gazette was used.
The vehicle body frame 100 is divided into a front frame 20, a main frame 10, and a seat rail 30 as shown in FIGS. 1 and 2 of the publication.

  For example, when a floor portion on which a passenger puts his / her foot is provided below the lower tube 12 in the main frame 10 provided at the center, the floor portion is subjected to weight corresponding to the number of passengers at the maximum, so reinforcement is required. In some cases, the vehicle weight and cost may increase.

  However, the conventional one also supports the swing arm 7 on the main frame 10, and the load concentrates only on the main frame 10, leading to an excessive weight increase and cost increase of the main frame 10. There was a possibility.

  An object of the present invention is to reduce the weight and cost of a vehicle by improving the body frame structure of the vehicle.

The invention according to claim 1 divides a vehicle body frame of a vehicle having at least four wheels into a front frame, a center frame, and a rear frame, and assembles the front frame, the center frame, and the rear frame, respectively . In a vehicle body frame structure in which a front frame is connected to the front part of the center frame and a rear frame is connected to the rear part of the center frame , a front member is suspended only on the front frame and a steering member for steering the front wheel is provided. In addition , it is equipped with a power unit consisting of an engine and a transmission, and has a floor on which occupants put their feet. The rear frame is suspended only by the rear frame, and the front frame and the center frame are welded. The rear frame is detachable from the center frame. Characterized in that attached.

According to a second aspect of the present invention, in the above configuration, preferably, the center frame includes a seat support portion that supports a seat on which an occupant sits, and the floor portion is provided in front of the seat support portion.

According to a third aspect of the present invention, in the above-mentioned configuration, the center frame preferably includes a step frame that supports a pair of left and right steps on which a passenger sits when getting on and off, and the floor portion is raised one step higher than the step. It is characterized by.

  In the invention according to claim 1, since the engine is mounted on the center frame and the floor portion is provided, the floor portion is provided in order to provide the floor portion on the center frame having high rigidity in order to mount the heavy engine. There is no need for special reinforcements. Furthermore, since the rear wheel is suspended by the rear frame, the center frame does not increase in weight excessively, so that the weight of the vehicle and the cost can be reduced.

In the present invention, since the rear frame is detachably attached to the center frame, it is possible to improve maintainability such as repair and replacement of the rear frame. In addition, the rear wheel suspension system can be changed, or the rear frame can be easily changed to one with different specifications, for example, the rear wheel can be changed to a crawler type, so that the usability of the vehicle can be improved.

In the invention according to claim 2 , since the seat support portion for supporting the seat on which the occupant is seated is provided on the center frame and the floor portion is provided in front of the seat support portion, the occupant seated on the seat with the highly rigid center frame is provided. Can also be supported.

In the invention according to claim 3 , the center frame is provided with a step frame that supports a pair of left and right steps to be put on when an occupant gets on and off, and the floor is raised one step higher than the steps.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a vehicle adopting a vehicle body frame structure structure according to the present invention. A vehicle 10 includes a vehicle body frame 11 including a front frame 12, a center frame 13, and a rear frame 14, and the front frame 12 is A front wheel suspension (not shown) for suspending the front wheel 16 is attached and a steering member (steering shaft 17, a handle 18 attached to the upper end of the steering shaft 17, etc.) for steering the front wheel 16 is provided. An engine 22 and a transmission 23 integrally attached to the engine 22.), a fuel tank 24, left and right seats 25, 26 (only the reference numeral 25 on the front side is shown) is attached, and the rear frame 14 is attached to the rear left and right A rear wheel suspension (not shown) for suspending the wheel 27 is attached. It is a terrain vehicle fitted with a tiltable and the cargo bed 28.

  The center frame 13 includes a pair of left and right steps 31 and 31 (only the reference numeral 31 on the front side is shown) on which a passenger sits when getting on and off, and a floor 32 that is one step higher than the step 31. An occupant seated on the seats 25 and 26 puts his / her feet on the portion 32. Reference numeral 36 denotes a roll bar attached to the front frame 12 and the center frame 13.

  FIG. 2 is a plan view of the vehicle according to the present invention, in which a seat frame 41 is attached to the center frame 13 of the vehicle 10, and the seats 25 and 26 are supported by the seat frame 41 and below the seats 24 and 25. The power unit 21 is disposed between a pair of left and right lower side frames 42, 42 extending in the vehicle longitudinal direction, and the fuel tank 24 is extended in the vehicle width direction in front of the power unit 21 and below the seats 25, 26. Indicates placement.

FIG. 3 is a perspective view showing a vehicle body frame and a step frame according to the present invention.
The front frame 12 of the vehicle body frame 11 includes a front first cross member 51 attached to the front ends of the lower side frames 42, 42 and a pair of left and right front lower side frames 52, 52 extending forward from the front first cross member 51. A pair of left and right front first standing frames 53 and 53 raised from the front lower side frames 52 and 52, and a pair of left and right front second standing frames 54 and 54, and these A pair of left and right front intermediate frames 56, 56 connected to the respective front ends of the front first standing frame 53 and the second front standing frame 54, and a front second attached to the left and right front first standing frames 53, 53. Cross member 57 and left and right front second upright frames 54 and 54 A front third cross member 58 and a front fourth cross member 59 mounted across the front, a front fifth cross member 62 mounted across the left and right front intermediate frames 56, 56, and the front third cross member 58 And connecting frames 63, 63 attached between the front fifth cross members 62.

  The front lower side frame 52 is a member to which a front lower bracket 66 is attached, and the front lower bracket 66 and a lower portion of the front first upright frame 53 described above support lower arms 68 and 68 that constitute a front wheel suspension.

  The front intermediate frame 56 is a member to which a front upper bracket 67 is attached. The front upper bracket 67 and the upper part of the front first upright frame 53 support upper arms 69 and 69 constituting a front wheel suspension. To do.

The center frame 13 includes a pair of left and right lower side frames 42, 42, a pair of left and right center standing frames 71, 71 raised from the rear of each of the lower side frames 42, 42, A pair of left and right bent frames 72, 72 attached to each of the center standing frames 71, a pair of left and right subframes 73, 73 attached to each of the bent frames 72 and the front second standing frame 54, and these The seat support posts 74 and 74 raised from the rear portions of the sub frames 73 and 73, the seat support bar 76 attached to the upper ends of the seat support posts 74 and 74, and the left and right sub frames 73 and 73 are attached. Pass to center first cross member 77 and left and right lower side frames 42, 42 The attached center second cross member 78, the center third cross member 81 attached to the left and right center upright frames 71, 71, and a pair of left and right connecting frames 82 attached to the rear portions of the center upright frames 71, 71. , 82, a pair of left and right connection brackets 83, 83 attached to the connection frame 82 to removably connect the center frame 13 to the rear frame 14, and a center fourth attached to the connection brackets 83, 83. Cross members 84 and 84 are included.
The seat support bar 76 is a member that supports the seats 25 and 26 through the seat frame 41 shown in FIG. 2 together with the left and right bent frames 72 and 72.

  The lower side frames 42 and 42 and the sub frames 73 and 73 are members to which a pair of left and right step frames 90 and 90 that support the step 31 (see FIG. 1) and the floor portion 32 (see FIG. 1) are attached.

  The step frame 90 includes a lower first side frame 91, a lower second side frame 92, and a lower third side frame 93 that extend from the lower side frame 42 toward the vehicle side, and the lower first side frame 91 and the lower second frame. From the side frame 92 and the U-shaped side U-shaped frame 94 attached to the respective distal ends of the lower third side frame 93, the side standing frame 96 raised from the middle portion of the lower third side frame 93, and the subframe 73 An L-shaped upper side L-shaped frame 97 extending to the vehicle side and extending rearward of the vehicle and having the tip connected to the side standing frame 96, and extending from the subframe 73 to the vehicle side and the tip to the upper side L-shaped frame 97 An upper side frame 98 coupled to the lower first side frame 91 A first support post 101, 101 mounted to pass the respective fine upper side L-shaped frame 97, and a second strut 102 and 102 Metropolitan mounted passing each of the lower second side frame 92 and the upper side frame 98.

The lower first side frame 91, the lower second side frame 92, the lower third side frame 93 and the side U-shaped frame 94 are members constituting the step support frame 103 on which the above-described step 31 is placed.
The sub frames 73 and 73, the upper side L-shaped frames 97 and 97, and the upper side frames 98 and 98 are members constituting the floor portion support frame 104 on which the floor portion 32 described above is placed.

  The rear frame 14 includes a pair of left and right rear upper frames 111 and 111 and a pair of left and right rear lower frames 112 and 112 that are attached to the connection frames 82 and 82 via connection brackets 83 and 83, and a rear upper frame 111 and a rear lower frame. A pair of left and right rear inclined frames 113, 113 attached to each of 112, and a pair of left and right rear standing frames 114, 114 attached to the rear end portions of the rear upper frame 111 and the rear lower frame 112, respectively. A rear intermediate first cross member 115 attached to the left and right rear inclined frames 113, 113, and a pair of left and right rear intermediate frames 116, 116 attached to the rear inclined frame 113 and the rear standing frame 114; Left and right rear upper frames 111, 111 The rear upper cross member 117 attached and handed over, the rear lower first cross member 118 and the rear lower second cross member 121 attached and handed over to the left and right rear lower frames 112 and 112, and the left and right rear standing frames 114 and 114 The rear intermediate second cross member 122 is attached.

  The rear lower frame 112 is a member to which rear lower brackets 126 and 127 are attached, and these rear lower brackets 126 and 127 support lower arms 124 and 124 that constitute a rear wheel suspension.

  The rear intermediate frame 116 is a member to which rear upper brackets 131 and 132 are attached, and these rear upper brackets 131 and 132 support upper arms 125 and 125 constituting a rear wheel suspension.

FIG. 4 is a plan view showing the main part of the vehicle body frame according to the present invention, in which the left and right steps 31 and 31 and the floor 32 are shown by hatching.
Step 31 is a portion of the range from the upper side L-shaped frame 97 to the side U-shaped frame 94 outside the upper side L-shaped frame 97, and the front-rear length of the side-shaped U-shaped frame 94 in the vehicle longitudinal direction. 31a is located behind the seats 25 and 26.

  The floor portion 32 includes the left and right upper side L-shaped frames 97 in the vehicle width direction, and is an inner range thereof. In the vehicle front-rear direction, the front portion of the front frame 12 (see FIG. 1) is located in front of the fuel tank 24. It is a part of the range which makes the boundary with the dashboard not shown located in the vehicle rear from the front 2nd standing frame 54 (refer FIG. 1) the front end. Since the fuel tank 24 bulges forward in the center at the center, the rear edge 32a of the floor portion 32 protrudes forward, but since there is a space between the seats 25 and 26, there is no concern that the occupant's feet will be particularly narrow.

FIG. 5 is a perspective view showing a step and a floor portion according to the present invention, and shows that the center frame 13 and the step frame 90 are provided with the step 31 and the floor portion 32.
Thus, by providing step 31 and a floor 32 that is one step higher than this step 31, it is better to step on step 31 and go to floor 32 than to go directly to floor 32. Getting on and off is easier.

  Further, the high floor 32 causes the harness, auxiliary equipment, and the like below the floor 32 and above the lower side frame 42 (that is, approximately between the subframe 73 and the lower side frame 42). A space 135 in which small items, tools, and the like can be stored can be formed.

  FIG. 6 is a side view showing a state in which the vehicle body frame according to the present invention is divided. The front frame 12 and the center frame 13 of the vehicle body frame 11 are joined to the front first cross member 51 and the tip of the lower side frame 42. And the center frame 13 and the rear frame 14 are connected to the connecting frame 82, the rear upper frame 111, and the rear lower frame 112 at the joint portion between the front second standing frame 54 and the tip of the sub frame 73. Can be divided.

  Thus, if the vehicle body frame 11 is divided into a front frame 12, a center frame 13, and a rear frame 14, each frame 12, 13, and 14 becomes small and light, and is easy to transport and store. If the frames 12, 13, and 14 are assembled in advance, the front frame 12 and the center frame 13 are joined, and the center frame 13 and the rear frame 14 are connected by bolts and nuts, the body frame 11 The whole assembly becomes easy and productivity can be improved.

  FIG. 7 is a first perspective view showing the connecting portion between the center frame and the rear frame according to the present invention. The connecting bracket 83 is composed of an inner bracket 141 and an outer bracket 142, and the connecting frame 82 and the rear upper frame 111, The rear lower frame 112 is sandwiched between the inner bracket 141 and the outer bracket 142, the connecting frame 82, the inner bracket 141, and the outer bracket 142 are fastened with bolts and nuts (not shown), and the inner with the bolts and nuts (not shown). The bracket 141, the outer bracket 142, the rear upper frame 111, and the rear lower frame 112 are fastened. Reference numeral 145 denotes a rear bracket attached to the rear side surface of the rear upper frame 111. The rear bracket 145 supports the upper end of the rear cushion unit constituting the rear wheel suspension. (The rear bracket 145 is omitted in FIG. 3).

  FIG. 8 is a second perspective view showing the connecting portion between the center frame and the rear frame according to the present invention. The rear frame 14 (see FIG. 7) is removed from the center frame 13, and the outer bracket 142 (see FIG. 7) is also removed. Indicates the state. The inner bracket 141 is a member obtained by press-molding a plate material, and the outer bracket 142 is the same. The connection frame 82 is a hollow member having a rectangular cross section attached to the rear portion of the center standing frame 71.

Next, the connection procedure between the center frame 13 and the rear frame 14 described above will be described.
9 (a) to 9 (c) are operation diagrams showing a connection procedure between the center frame and the rear frame according to the present invention.
In (a), as shown by arrows, the left and right inner brackets 141 and 141 connected to the inner side of the left and right connecting frames 82 and 82 by the center fourth cross member 84 are formed in the connecting frame 82 with bolt insertion holes 151. The outer bracket 142 is applied to the outer surfaces of the connecting frames 82 and 82 as indicated by arrows.

  In (b), from the vehicle side, the bolt 152 is passed through the bolt insertion hole formed in the outer bracket 142, the bolt insertion hole 151 of the connecting frame 82, the bolt insertion hole formed in the inner bracket 141 in this order, and the nut at the tip of the bolt 152 Screw 153.

  In (c), the rear upper frame 111 (and the rear lower frame 112) in which the bolt insertion hole 155 is opened is inserted between the inner bracket 141 and the outer bracket 142, and the bolt 156 is inserted from the vehicle side to the outer bracket 142. Through the bolt insertion hole, the bolt insertion hole 155 of the rear upper frame 111 (and the rear lower frame 112), and the bolt insertion hole opened in the inner bracket 141, and a nut 157 is screwed into the tip of the bolt 156. Thus, the connection of the rear frame 14 to the center frame 13 is completed.

  FIG. 10 is a perspective view showing the roll bar of the vehicle according to the present invention. The roll bar 36 is located above the rear pipe 161 rising from the rear portion of the center frame 13 (see FIG. 3) and the front frame 12 (see FIG. 3). It consists of a front pipe 162 that rises obliquely backward, and a U-shaped top pipe 163 that passes to the rear pipe 161 and the front pipe 162.

The rear pipe 161 includes a lower pipe 165 attached to the center standing frames 71 and 71 (see FIG. 3), and an upper pipe 166 attached to the upper end of the lower pipe 165.
The lower pipe 165 includes L-shaped pipes 167 and 168 provided on the left and right sides, and a V-shaped pipe 171 attached to the L-shaped pipes 167 and 168, and an attachment portion 165a attached to the center upright frames 71 and 71. , 165b and attachment portions 165c, 165d attached to the upper pipe 166.

  The upper pipe 166 includes a U-shaped pipe 173 and a V-shaped pipe 174 attached to the left and right sides of the U-shaped pipe 173, and mounting portions 166a and 166b for mounting on the mounting portions 165c and 165d of the lower pipe 165, Attachment portions 166c and 166d attached to the top pipe 163 are provided.

  The front pipe 162 includes a straight left pipe 176 and a right pipe 177. The left pipe 176 includes an attachment portion 162a attached to the front second upright frame 54 (see FIG. 3) and an attachment portion 162b attached to the top pipe 163. The right pipe 177 includes an attachment portion 162c attached to the front second upright frame 54 and an attachment portion 162d attached to the top pipe 163.

The top pipe 163 includes attachment portions 163a and 163b attached to the attachment portions 166c and 166d of the upper pipe 166 at each end portion of the U-shape, and attachments attached to the attachment portions 162b and 162d of the front pipe 162 at the respective corner portions of the U-shape. 163c and 163d are provided.
Each attachment part shown above is fastened with a volt | bolt and a nut.

  As described above with reference to FIGS. 1, 4 and 5, the present invention firstly includes a vehicle body frame 11 of a vehicle 10 having at least four wheels (front wheels 16, rear wheels 27) as a front frame 12, a center. In a vehicle body frame structure of the vehicle 10 that is divided into a frame 13 and a rear frame 14 and is connected in an assembled state, the front frame 12, the center frame 13 and the rear frame 14 are suspended on the front frame 12. In addition, a steering shaft 17 and a handle 18 as steering members for steering the front wheels 16 are provided, an engine 22 is mounted on the center frame 13, and a floor portion 32 on which an occupant rests his / her foot is provided. The ring 27 is suspended.

  Since the engine 22 is mounted on the center frame 13 and the floor portion 32 is provided, the floor portion 32 is provided on the center frame 13 having increased rigidity for mounting the heavy engine 22. No special reinforcing material is required, and the vehicle 10 can be reduced in weight and cost.

  Moreover, each of the front frame 12, the center frame 13, and the rear frame 14 becomes small, and can be easily transported and stored. Furthermore, it becomes possible to connect the three frames 12, 13, and 14 after assembling necessary parts to the front frame 12, the center frame 13, and the rear frame 14, thereby improving the assembling property. .

  Secondly, as described with reference to FIGS. 6 and 7, the present invention preferably has a rear frame 14 detachably attached to the center frame 13 in the above-described configuration, and the front frame 12 and the center frame 13 are attached. It is characterized by welding.

  Since the rear frame 14 is detachably attached to the center frame 13, maintenance performance such as repair and replacement of the rear frame 14 can be improved. Further, the rear frame 14 can be easily changed to one having different specifications, and the usability of the vehicle 10 (see FIG. 1) can be improved.

  Thirdly, as shown in FIGS. 1 and 2, the present invention preferably includes a seat frame 41 as a seat support portion that supports seats 25 and 26 on which a passenger sits on the center frame 13 in the above-described configuration. The floor portion 32 is provided in front of the seat frame 41.

  Since the center frame 13 includes the seat frame 41 and the floor portion 32 is provided in front of the seat frame 41, the occupant seated on the seats 25 and 26 can be supported by the highly rigid center frame 13.

  The vehicle body frame structure of the present invention is suitable for a four-wheeled vehicle.

1 is a side view of a vehicle that employs a vehicle body frame structure according to the present invention. 1 is a plan view of a vehicle according to the present invention. It is a perspective view which shows the vehicle body frame and step frame which concern on this invention. It is a top view which shows the principal part of the vehicle body frame which concerns on this invention. It is a perspective view which shows the step and floor part which concern on this invention. It is a side view which shows the state which divided | segmented the vehicle body frame which concerns on this invention. It is a 1st perspective view which shows the connection part of the center frame and rear frame which concern on this invention. It is a 2nd perspective view which shows the connection part of the center frame and rear frame which concern on this invention. It is an effect | action figure which shows the connection point of the center frame and rear frame which concern on this invention. It is a perspective view which shows the roll bar of the vehicle which concerns on this invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Body frame, 12 ... Front frame, 13 ... Center frame, 14 ... Rear frame, 16, 27 ... Wheel (front wheel, rear wheel), 17, 18 ... Steering member (steering shaft, steering wheel), 21 DESCRIPTION OF SYMBOLS ... Power unit, 22 ... Engine, 23 ... Transmission, 25 , 26 ... Seat, 31 ... Step, 32 ... Floor part, 41 ... Seat support part (seat frame) , 90 ... Step frame .

Claims (3)

A vehicle body frame having at least four wheels is divided into a front frame, a center frame, and a rear frame, and the front frame, the center frame, and the rear frame are assembled, and the front portion of the center frame is Front frame
In a vehicle body frame structure for connecting the rear frame to the rear portion of the center frame,
Only the front frame is provided with a steering member that suspends the front wheel and steers the front wheel,
A power unit composed of an engine and a transmission is mounted only on the center frame, and a floor on which an occupant rests his / her foot is provided.
Suspend the rear wheel only with the rear frame ,
The front frame and the center frame are welded and joined.
The rear frame is detachably attached to the center frame.
A vehicle body frame structure characterized by that. The vehicle body frame structure according to claim 1 , wherein the center frame includes a seat support portion that supports a seat on which an occupant is seated, and the floor portion is provided in front of the seat support portion.   2. The vehicle according to claim 1, wherein the center frame includes a step frame that supports a pair of left and right steps to be put on when an occupant gets on and off, and the floor portion is raised one step higher than the step. Body frame structure.

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