CN2615026Y

CN2615026Y - Bicycle structure with dismountable frame

Info

Publication number: CN2615026Y
Application number: CN 03246523
Authority: CN
Inventors: 赵弘昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-25
Filing date: 2003-04-25
Publication date: 2004-05-12
Anticipated expiration: 2013-04-25

Abstract

Disclosed is a dismountable combined type bicycle which is mainly assembled reciprocally by a front frame and a rear frame, wherein the bottom the seat tube of the front frame and a first casing on thefive-way tube of the rear frame can be reciprocally assembled and form into a first composite device. Furthermore, a clamping element which is arranged on the upper side of the seat tube of the front frame and a locking element which is arranged on the rear frame form into a second composite device which is locked to each other in dismountable mode. An integrated frame can be assembled by the first device and the second device quickly or dismantled and is propitious to transport or collection.

Description

The bicycle structure of disassembled vehicle frame

Technical field

The utility model relates to a kind of bicycle, is meant a kind of easy disassembly especially and is easy to collect the bicycle structure that transports and can keep the disassembled vehicle frame of unit frame structural strength.

Background technology

The traditional vehicle shelf structure of bicycle generally is divided into fixed type and collapsible two big classes.

The fixed type body frame structure for automotive is with head tube, front fork, goes up vehicle frame pipes such as pipe, following pipe, seat pipe and back vent, is welded to each other or is fused into one in the permanent bond mode.Its advantage is that the design of the good and appearance and modeling of body frame structure for automotive intensity is more unrestricted, is easy to design arch bar truck for example etc. and is easy to the appearance and modeling being accepted and like by the customer; Its shortcoming then is that the packing volume is excessive, cost significantly increases to cause that storage, packing, counter transport etc., especially its vehicle frame length is than long and weight non-light (referring to Electrical Bicycle especially), make it all more not convenient in collection and carrying, this shortcoming causes the customer to be difficult to use bicycle to the countryside of general this fixed type body frame structure for automotive of C-class carrying to drive, and influences leisure and body-building function that bicycle should have; Though various automobile-used bicycle portable frame is arranged at present on the market, for the user bicycle rack is located on the portable frame of the roof or the tailstock, precisely because comparatively loaded down with trivial details on not only operating, and may influence traffic safety.

The Foldable frame structure mainly be central frame beam be provided with at least one make vehicle frame can be mutually before and after or the folding hinge member of doubling up and down, its advantage is convenient to collection and can be utilized this Folding Bicycle of car carrying to drive to the countryside for shortening vehicle frame length by folding.Its shortcoming then is that body frame structure for automotive intensity is not good, must give reinforcement by reinforced structure, otherwise easily produce mark of break from folding hinge, its appearance and modeling is subjected to many restrictions such as folding hinge and folding direction simultaneously, is difficult for designing being easy to the appearance and modeling being accepted and like by the customer; In addition, on the packing volume, though folding bicycle can shorten length after folding, precisely because integral width but with increase considerably, so the packing volume also can't effectively be reduced in its folding back, for maker and dealer, still has its inconvenience no matter collect or transport; Simultaneously, the anti-general stationary bicycle of the car weight of folding bicycle is heavier, and its carrying property is on the contrary not as stationary bicycle.

This shows that the body frame structure for automotive of bicycle still has further improved necessity.

This novel content

The purpose of this utility model is to provide a kind of bicycle structure of disassembled vehicle frame, and it need not use any hand tool, and is can be by general user simple and easy and apace bicycle is disassembled at least two partly, perhaps it organized again and founds into complete vehicle frame.

An of the present utility model purpose is to provide a kind of bicycle structure of disassembled vehicle frame, after being disassembled, it can effectively dwindle the packing volume, the weight of disperseing bicycle simultaneously, separately take for user's gradation, be convenient to collection and carrying, also the multi-section bicycle after disassembling can be positioned over simultaneously in the general car luggage compartment, as short range transfer to or have a walk in the outskirts the leisure drive.

Another purpose of the present utility model is to provide a kind of bicycle structure of disassembled vehicle frame, and its vehicle frame overall construction intensity is good, need not carry out multinomial reinforcement measure as Folding Bicycle.

Another purpose of the present utility model is the bicycle structure that is to provide a kind of disassembled vehicle frame, and it is easy to carry out the appearance and modeling design as the fixed type body frame structure for automotive, is not subjected to the restriction of the utility model composite construction; Be applicable to the body frame structure for automotive of known arch bar truck, Y shape shock-absorbing vehicle frame, gentlewoman's car, perambulator or the like various moulding simultaneously, can keep the integraty and the aesthetic property of cycle frame.

Utility model purpose originally realizes by following technical proposals, the bicycle structure of disassembled vehicle frame of the present utility model, it includes a front vehicle frame and a back vehicle frame, and wherein this front vehicle frame is provided with the base riser and the seat pipe for this base riser of locking of attached seat cushion on the stem, of a front-wheel free to rotate, this front-wheel steering angle of a may command; This back vehicle frame then is provided with one for the five-way pipe that a crank-type stretcher and a chain-type driving device are installed, this five-way pipe more backhand welding connect firmly have one comprise, the back breeches pipe assembly of pipe under the back vent, can be driven by this driving device and the trailing wheel that rotates to assemble one; It is characterized in that: be installed with one first cannula portion on this five-way pipe, one second cannula portion that itself and this pipe bottom forms is formed first composite set of socket dismounting mutually jointly; In addition, be arranged at a clamping components of this pipe top and be located at a fastening component on the vehicle frame of back, form second composite set that can fasten dismounting mutually; This forward and backward chassis mount can be become a complete vehicle frame by this first and second composite set.By the dismounting member of forming by this first and second composite set, can fast forward and backward chassis mount be become a complete vehicle frame, perhaps disassembled, in order to carrying or collection.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the end face three-dimensional view of bicycle structure first embodiment of the disassembled vehicle frame of the utility model;

Fig. 2 is the plan view of bicycle shown in Figure 1;

Fig. 3 is similar to Fig. 2, but this bicycle is disassembled into three parts;

Fig. 4 is the amplification isometric exploded view of first composite set in the bicycle shown in Figure 1;

Fig. 5 is the amplification isometric exploded view of another enforcement sample attitude of first composite set in the bicycle shown in Figure 1;

Fig. 6 is the amplification isometric exploded view of second composite set in the bicycle shown in Figure 1;

Fig. 7 is the plan view of bicycle structure second embodiment after disassembling of this disassembled vehicle frame;

Fig. 8 is the plan view of bicycle structure the 3rd embodiment after disassembling of this disassembled vehicle frame;

Fig. 9 is the plan view of bicycle structure the 4th embodiment after disassembling of this disassembled vehicle frame;

Figure 10 is that vehicle frame cooperates the plan view that is assembled into a Tandem Bicycle in the middle of utilizing bicycle shown in Figure 9 and; And

Figure 11 is the plan view of Tandem Bicycle shown in Figure 10 after assembled.

The specific embodiment

Please consult Fig. 1 to Fig. 3 simultaneously, bicycle structure first embodiment of disassembled vehicle frame provided by the utility model mainly includes a front vehicle frame 10 and a back vehicle frame 30; Both can utilize one first composite set 40 and one second composite set 60, and are organized the complete vehicle frame that stands as shown in Figures 1 and 2, also can be separated at least two unit as shown in Figure 3.

This front vehicle frame 10 includes a head tube 12, one interspersed from bottom to top front fork tube 14 by this head tube 12, these front fork tube 14 tops and leader's standpipe 13 interconnect, front fork tube 14 bottoms then utilize known combination members such as nut or Quick release 16 to be assembled with a front-wheel 15 free to rotate, 12 of this stem 13 and head tubes generally all are equiped with bearings at both ends, this stem 13 can freely be rotated, with the main steering component of controlling as the confession rider in an angular range.This head tube 12 extends back with a suitable gradient and connects on one pipe 11 and manage 17 once, the tail end solid welding of this upper and

lower pipe

11,17 connects a pipe 19, this pipe 19 can insert for the base riser 22 of attached seat cushion 21 on, and this base riser 22 must use known removable lockset such as quick lock anchor clamps 23 to be locked on the seat pipe 19.Above-mentioned go up pipe 11, down manage 17 and seat pipe 19 mutual group become a vehicle frame pipe assembly, and can be configured as for example body frame structure for automotive of various types such as rhombus or Y shape, not limited by this case legend.

This back vehicle frame 30 includes one for the five-way pipe 31 that a crank-type stretcher 34 and a chain-type driving device 35 are installed, this five-way pipe 31 more backhand welding connects firmly and has under the back vent pipe 39, this back vent down tail end of pipe 39 connects and manages 38 on the back vent with the suitable gradient solid welding that makes progress forward again, form a back breeches pipe assembly, utilize known combination members such as nut, end assembling one at this back breeches pipe assembly can be driven and the trailing wheel 37 of rotation by this driving device 35, makes whole back vehicle frame 30 form a complete transmission component.

As previously mentioned, the dismounting member that the application can utilize first and second composite set 40,60 to form, with forward and backward

vehicle frame

10,30 fast group stand into one can be for the complete vehicle frame that drives, or will separate at least two unit such as forward and

backward vehicle frame

10,30.

Please consult Fig. 4 simultaneously, this first composite set 40 includes second cannula portion 42 of one first cannula portion 41 and the 41 mutual sockets of one and first cannula portion, in the present embodiment, first cannula portion 41 is to be fixedly arranged on the five-way pipe 31 of this back vehicle frame 30, second cannula portion 42 then is fixedly arranged on the relative position of seat pipe 19 bottoms of this front vehicle frame 10, and this second cannula portion 42 can closely be nested be locked in this first cannula portion, 41 inside.These second cannula portion, 42 inside are embedded with some and are exposed to outer resilient pin 43, and be provided with in its bottom one for example the limit of indent groove change member 44; Be equipped with a respective pin hole 45 corresponding to resilient pin 43 positions as for 41 of this first cannula portion, and the corresponding chimeric member 46 that changes member 44 positions corresponding to limit, simultaneously more offer at least one axial crack 47, the elasticity trend that its open end is had inwardly tightened in the open end of this first cannula portion 41.When being nested with, this second cannula portion 42 enters this first cannula portion 41 when inner, this resilient pin 43 and limit are changeed member 44 and are embedded in just respectively in cooresponding pin-and-hole 45 and the chimeric member 46, utilize quick lock anchor clamps 48 to tighten simultaneously, make it be nested with second cannula portion 42 in it to the internal strain packing in the open end of this first cannula portion 41; This array mode can prevent that not only 41,42 of first and second cannula portion of mutual fit from producing relative displacement or abnormal case in relative rotation, more can strengthen anchoring strength between the two.

See also Fig. 5, another of this first composite set 40 implemented the sample attitude and is to use a locking nut 50 to replace employed quick lock anchor clamps 48 among Fig. 4.Wherein, second cannula portion, 42 surfaces are equipped with a stop bulge loop 51, use on this stop bulge loop 51 and to be provided with negative thread 52 and locking nut 50 free to rotate sheathed a moment, these first cannula portion, 41 surfaces are then carved relatively and are provided with for the sealed outside thread 53 of locking nut 50, being planted in second cannula portion 42 enters first cannula portion 51 when inner, can both be locked mutually by this locking nut 50.

Please consult Fig. 6 simultaneously, above-mentioned second composite set 60 comprises a clamping components 61 and a fastening component 62, it in this example the proximal portion of clamping components 61 being located at seat pipe 19, fastening component 62 then is located at the relative position place of pipe 38 front ends on the back vent, wherein clamping components 61 is that lamellar body 63 by two parallel spaced apart constitutes, each lamellar body 63 is provided with a perforation 64 relatively, can hold a Quick release 65 and pass; Fastening component 62 then have a breach 66 just can be positioned at two lamellar bodies 63 between and be fastened on the Quick release 65, the eccentric tommy bar 67 of mat Quick release 65 1 sides can force two lamellar bodies 63 mutually near and with fastening component 62 clamp fittings; Because clamping components 61 and fastening component 62 are to be the device that is relatively fixed, so it also can change setting mutually, clamping components 61 to be located on the back vent on the pipe 38, fastening component 62 then is located at seat and is managed a relative position place of 19.

Above-mentioned quick lock anchor clamps 48 and Quick release 65 all belong to known members, its structure includes the screw rod and the nut that can screw togather mutually and is articulated in the screw rod eccentric tommy bar of end in addition, thought quick lock anchor clamps 48 more add one and supply a pipe fitting to pass therebetween and be similar to the clasp of C shape on this screw rod, this off-centre tommy bar is pulled in utilization, its cam face can be forced on this clasp, use inside packing and pass the pipe fitting of clasp, or can oppositely turn back this off-centre tommy bar loosening pipe fitting, and reach the purpose of quick release or assembling pipe fitting.

Desire made up forward and backward vehicle frame at 10,30 o'clock, be that quick lock anchor clamps 48 and Quick release 65 are unclamped under the situation of not separating in advance, and with a suitable gradient second cannula portion 42 of seat pipe 19 bottoms of front vehicle frame 10 is planted and to enter in first cannula portion 41 on the vehicle frame 30 five-way pipes 31 of back, the fastening component 62 of pipe 38 front ends on the back vent of back vehicle frame 30 is embedded in the clamping components 61 of seat pipe 19 proximal portions of front vehicle frame 10, then, utilize eccentric tommy bar to be wrenched these quick lock anchor clamps 48 and Quick release 65, use that forward and backward

vehicle frame

10,30 is locked mutually.Anti-, as desire to separate forward and backward

vehicle frame

10,30 o'clock, and then utilize eccentric tommy bar oppositely to unclamp these quick lock anchor clamps 48 and Quick release 65, front vehicle frame 10 can be disassembled separation on the vehicle frame 30 of back.

See also Fig. 7, it is second embodiment of the bicycle structure of disassembled vehicle frame that the utility model provides, it mainly is to be employed as virgin body frame structure for automotive with bicycle, wherein the structure of front vehicle frame 10a, back vehicle frame 30a and the second composite set 60a is identical with aforementioned first embodiment, only at the vehicle frame length of tube and change slightly in shape, so that installing for example 16 " wait the perambulator tire; Second embodiment and the first embodiment main difference place, be by the former position that is fixedly arranged on five-way pipe 31a top with the first cannula portion 41a among the first composite set 40a, change the place, rear position that is arranged at five-way pipe 31a, and make it have two open ends, so that the second cannula portion 42a can be by the interspersed first cannula portion 41a that is opening by these two ends, and be equipped with a quick lock anchor clamps 48a in two open end, this design is to reduce the whole height of this child with bicycle, for children's ride-on.

See also Fig. 8, it is the 3rd embodiment of the bicycle structure of disassembled vehicle frame that the utility model provides, it mainly is that first and second cannula portion 41b, 42b with among the first composite set 40b exchanges enforcement that itself and first embodiment do not exist together, even also the first cannula portion 41b is located at this pipe 19b bottom, the second cannula portion 42b then is fixedly arranged on the relative position of this five-way pipe 31b.In addition, it is a sealing circular hole that this fastening component 62b goes up the breach that passes for Quick release 65b instead, and this can strengthen the anchoring strength between fastening component 62b and clamping components 61b; Only in operation, need dismounting Quick release 65b earlier, could dismounting this fastening component 62b and clamping components 61b.

See also Fig. 9, it is the 4th embodiment of the bicycle structure of disassembled vehicle frame that the utility model provides, it mainly is for increasing the structural strength of back breeches pipe assembly, it can be connected a reinforcement connection pipe or similar structure between pipe 39c under pipe 38c and the back vent on the back vent, can make the back breeches pipe assembly keep the triangular structure body, when separating, still have original design intensity and be not subjected to the external force effect and be out of shape; In the 4th embodiment the first cannula portion 41c that five-way pipe 31c is located in order, extend upward one and can be sleeved on the exterior semicircle reinforcement connection pipe 32 of seat pipe 19c, the front end of pipe 38c then is welded in the proximal portion of this reinforcement connection pipe 32 on the back vent, as for the former fastening component 62c that is arranged at pipe 38c front end on the back vent, then change the apical position place that is located at this reinforcement connection pipe 32, make it fasten mutually or to separate with the clamping components 61c that is arranged on the front vehicle frame 10c.In combination when forward and backward

vehicle frame

10c, 30c, but the indentation, there of reinforcement connection pipe 32 just containing seat pipe 19c insert, the bicycle structure of this disassembled vehicle frame is as good as fully with fixed type arch bar truck bicycle in appearance, can keep its apparent aesthetic feeling.

Please consult Figure 10 and Figure 11 simultaneously, it is that bicycle structure the 4th embodiment that utilizes disassembled vehicle frame shown in Figure 9 cooperates with vehicle frame 70 in the middle of and is assembled into a Tandem Bicycle; The forebody structure of this centre vehicle frame 70, be be provided with aforementioned back vehicle frame 30C in the members such as five-way pipe 71, crank-type stretcher 72, chain-type driving device 73, first cannula portion 74, reinforcement connection pipe 75 and fastening component 76 of identical formation, because its structure is identical with counterpart member among the back vehicle frame 30C, so do not give unnecessary details in addition, therefore the forebody structure of this centre vehicle frame 70 can replace the former position of vehicle frame 30C afterwards, and makes up mutually or disassemble with the second cannula portion 42C and clamping components 61C among the front vehicle frame 10C.As in this centre vehicle frame 70 by several horizontal

vehicle frame pipes

77,78,79 with the latter half of structure of the affixed all-in-one-piece of forebody structure, then be provided with aforementioned front vehicle frame 10C in identical formation seat pipe 80, go up the members such as base riser 82, clamping components 83 and second cannula portion 84 of attached seat cushion 81, because its structure is identical with counterpart member among the front vehicle frame 10C, so do not give unnecessary details in addition, therefore the latter half of structure of this centre vehicle frame 70 can replace the position of former front vehicle frame 10C, and makes up mutually or disassemble with the first cannula portion 41C and fastening component 62C among the back vehicle frame 30C.By will this centre vehicle frame 70 be assembled in forward and backward vehicle frame 10C, 30C between, stand as shown in figure 11 and can drive the formula of pulling together bicycle on it simultaneously and can organize for two people.

The brake member of the required use of bicycle in addition, the utility model then can use need not brake cable foot brake, the bicycle structure of the disassembled vehicle frame that it not only makes this case and is provided has more succinct beautiful appearance, simultaneously when assembling or disassembling operation, more can omit and take out stitches or the production time of the required consumption of wiring, and be the brake member that optimum this case is adopted, this kind foot brake is to belong to a kind of known members, and adopted by the commercially available bicycle of many moneys, directly quilt cover is used for the utility model.In addition, when as this case is adopted, needing the manual type brake member of apply the brakes line, then can adopt the design of separation type brake cable, to cooperate the modular vehicle frame structure of this case, as have head and button hole the separation type brake cable or as with brake cable block the back with the mutual fastener of two ends sheetmetal, be the modular design of separation type brake cable, it all can directly be overlapped is used for the utility model; In addition, this case also can be provided with a permanent seat on stem, and the control lever that will brake is locked on this permanent seat, when desiring to disassemble forward and backward vehicle frame, only need brake control lever is pulled down on permanent seat together with brake cable, and in the space that is inserted in the back vehicle frame of inciting somebody to action, also be the feasible brake member designs mode of this case.

The bicycle structure of disassembled vehicle frame provided by the utility model when comparing mutually with traditional integrate shaped type bicycle frame structure or Folding Bicycle, has more following advantage:

1) because this case each part vehicle frame (front-wheel, front vehicle frame, back vehicle frame) after disassembling, must separate separately indivedual plug hole cracks deposits, dwindle user's collection space significantly, thereby the multi-section bicycle can be positioned in the general car boot railway carriage or compartment simultaneously with this plug hole crack location mode, and carrying is to the countryside, when going on a tour for several kinsfolks, shared field drives enjoyment.

2) the dismounting operation does not require skillful skill, can be made up voluntarily and disassemble in the DIY mode by general user, and the user is visual itself to be needed, and disassembles whenever and wherever possible, in order to its collection, carry or put into the car boot railway carriage or compartment; Also can assemble whenever and wherever possible, transfer to (for example parking area is to interoffice) as short range or the leisure or take public transportation vehicle and drive of haveing a walk in the outskirts do travel at one's own expense in order to it.

3) can reduce the packing volume after disassembling and reach 60%, not only reduce manufacturer's storage, packing, counter shipment and delivery cost, more not take up space when collecting with seasonal user, more convenient when carrying.

4) weight of bicycle is split into two parts at least after disassembling, more light when allowing the user carry, especially, more convenient for the carrying of carrying of the quite heavy Electrical Bicycle of weight.

5) assembling and quick easily both can have been kept the moulding of conventional fixed formula vehicle frame, and not influence the due structural strength of conventional fixed formula vehicle frame.

6) dealer does not need bicycle is sold preceding last assembling procedure, not only reduces its manual operation cost, also reduces its storage and landlocked distribution cost simultaneously.

The bicycle structure of the disassembled vehicle frame that 7) this case provided, be applicable to for example vehicle frame style of various moulding such as rhombus, Y shape, gentlewoman's car, no matter and wheel diameters size (12 inch, 16 inch, 20 inch, 24 inch, 26 inch, 700C etc.) is all applicable, makes the field of application of this case unrestricted.

Above-listed detailed description is specifying at possible embodiments of the present utility model; but described embodiment is not the protection domain of asking in order to restriction the utility model; allly do not break away from the equivalence that the utility model skill spirit does and implement or change, all should be contained in the application's the protection domain.

Claims

1. the bicycle structure of a disassembled vehicle frame, it includes a front vehicle frame and a back vehicle frame, and wherein this front vehicle frame is provided with the base riser and the seat pipe for this base riser of locking of attached seat cushion on the stem, of a front-wheel free to rotate, this front-wheel steering angle of a may command; This back vehicle frame then is provided with one for the five-way pipe that a crank-type stretcher and a chain-type driving device are installed, this five-way pipe more backhand welding connect firmly have one comprise, the back breeches pipe assembly of pipe under the back vent, can be driven by this driving device and the trailing wheel that rotates to assemble one; It is characterized in that:

Be installed with one first cannula portion on this five-way pipe, one second cannula portion that itself and this pipe bottom forms is formed first composite set of socket dismounting mutually jointly; In addition, be arranged at a clamping components of this pipe top and be located at a fastening component on the vehicle frame of back, form second composite set that can fasten dismounting mutually; This forward and backward chassis mount can be become a complete vehicle frame by this first and second composite set.

2. the bicycle structure of disassembled vehicle frame according to claim 1 is characterized in that the described second cannula portion inside is embedded with some and is exposed to outer resilient pin, and is provided with a limit commentaries on classics member in its bottom; This first cannula portion then is equipped with a respective pin hole for this resilient pin embedding, and changes the chimeric corresponding chimeric member of member for this limit.

3. the bicycle structure of disassembled vehicle frame according to claim 1 is characterized in that the open end of described first cannula portion offers at least one axial crack, makes this its open end have an elasticity trend of inwardly being tightened; And utilizing quick lock anchor clamps to tighten in this open end, this is placed on second cannula portion in this first cannula portion to the internal strain packing to make it.

4. the bicycle structure of disassembled vehicle frame according to claim 1, it is characterized in that described second cannula portion is arranged with a locking nut outward, this first cannula portion surface is then carved relatively and is provided with for the sealed outside thread of this locking nut, and first and second cannula portion that will this mutual fit by this locking nut is locked mutually.

5. the bicycle structure of disassembled vehicle frame according to claim 1 is characterized in that described clamping components is that lamellar body by two parallel spaced apart constitutes, and each lamellar body is provided with a perforation relatively, can hold a Quick release and pass; This fastening component then have a breach just can be positioned at these two lamellar bodies between and be fastened on this Quick release, an eccentric tommy bar of this Quick release one side of mat, can force this two lamellar body mutually near and with this fastening component clamp fitting.

6. the bicycle structure of disassembled vehicle frame according to claim 1 is characterized in that described first cannula portion is the place, rear position that is fixedly arranged on this five-way pipe, and has two open ends, interts by this first cannula portion for this second cannula portion.

7. the bicycle structure of disassembled vehicle frame according to claim 1, it is characterized in that described first cannula portion extends upward one and can be sleeved on the exterior semicircle reinforcement connection pipe of this pipe, the front end of pipe is to be welded on this reinforcement connection pipe on this back vent, and in the top of this reinforcement connection pipe this fastening component is set.

8. the bicycle structure of disassembled vehicle frame according to claim 7 is characterized in that more including a middle vehicle frame, and it comprises by mutual affixed all-in-one-piece one a forebody structure of several horizontal vehicle frame pipes and a latter half of structure; Wherein this forebody structure can replace this back vehicle frame, and makes up mutually with second cannula portion and clamping components in this front vehicle frame; And this latter half of structure can replace this front vehicle frame, and makes up mutually with first cannula portion and fastening component in this back vehicle frame.