CN204137244U - folding frame - Google Patents

Abstract

A folding bicycle frame is used for improving a folding structure used by the existing folding bicycle frame. The utility model discloses a folding chassis contains: the first frame is provided with a first pivot hole and a guide hole; the second frame is provided with a second pivot hole and a through hole and is mutually sleeved with the first frame; and the positioning module is provided with two positioning blocks, each positioning block is abutted against the outer surface of the second frame and the inner surface of the first frame, each positioning block is coaxial with the second pivot hole, a first locking piece penetrates through the first pivot hole, the second pivot hole and the two positioning blocks from one side of the first frame and is combined with a second locking piece arranged on the other side of the first frame, the acting force of each positioning block abutted against the outer surface of the second frame and the inner surface of the first frame can be adjusted by adjusting the first locking piece and the second locking piece, an elastic limiting component penetrates through the through hole, and two ends of the elastic limiting component are abutted against the guide holes.

Description

folding frame

technical field

The utility model relates to a vehicle frame, in particular to a folding vehicle frame.

Background technique

Please refer to Figures 1 and 2, which disclose an existing folding positioning structure 9 used in a scooter. A fixed seat 92 and a positioning assembly 93 of B; the fixed seat 92 is made of two vertical plates 921, each of which is provided with a pivot hole 922 and an arc track hole 923, and the two vertical plates 921 The pivot hole 922 and the arc track hole 923 correspond to each other; the square pipe 91 is pivotally connected between the two vertical plates 921, and the positioning component 93 passes through the fixing seat 92 and the square pipe 91 to be fixed together. Wherein, two ends of each arc track hole 923 are respectively provided with a concave portion 924, and the positioning assembly 93 is composed of a quick release screw 931, a nut 932, a spring 933 and two positioning bolts 934, the quick release screw 931 passes through the two positioning bolts 934, the spring 933 and the two vertical plates 921 from one side of the fixed seat 92, and is locked by the other side of the fixed seat 92 with the nut 932 to complete the assembly. The quick release screw 931 A pivotable cam wrench 935 is connected, and the two positioning pins 934 are respectively provided with a flange 936 .

According to this, as long as the cam wrench 935 is pulled, the two positioning pins 934 can be tightened or loosened by using the cam wrench 935, so that the two positioning pins 934 can be positioned on the square tube 91 as the square tube 91 is erected or folded. The two arc-shaped track holes 923 slide, and the flanges 936 of the two positioning pins 934 are pressed into the concave portions 924 at the two ends of the two arc-shaped track holes 923 to form a fixed shape. An embodiment similar to the existing folding positioning structure 9 has been disclosed in the patent case "Folding Positioning Structure of Scooter" published in Taiwan, China No. 506383.

However, since the existing folding positioning structure 9 uses the cam wrench 935 to tighten or loosen the two positioning bolts 934, and then control whether the square tube 91 and the fixing seat 92 are in a relatively pivotable state or It is combined and fixed and cannot be relatively pivoted, but the cam wrench 935 is exposed on the outside of the scooter, and the end of the cam wrench 935 does not have any anti-hook design, so it often happens due to accidental collision or hooking on objects in actual use. And the situation of pulling the cam wrench 935 makes the use safety of the scooter assembled with the folding positioning structure 9 still very worrying. In particular, if the existing folding positioning structure 9 is used on a car for young children to ride (such as children's bicycles, slide cars, etc.), young children are more likely to randomly flip the folding positioning structure 9 because of curiosity or fun. Cam wrench 935 to cause an accident.

In view of this, existing folding vehicle frame really still needs to be improved.

Contents of the invention

The purpose of the utility model is to provide a folding vehicle frame, which will not turn into a pivotable and foldable state due to collision or hooking on objects during use, so as to improve the safety of use.

Another purpose of the present utility model is to provide a folding frame, even if it is used in a car for young children to ride, it can also prevent young children from turning the frame into a pivotable and foldable state, so as to reduce unnecessary accidents. Accident.

In order to achieve the aforementioned purpose, the technical content used in the utility model includes:

A folding vehicle frame, comprising: a first vehicle frame, the front end is provided with a first pivot hole and a guide hole, the first pivot hole and the guide hole both penetrate to the left and right sides of the first vehicle frame Two sides; a second vehicle frame, the rear end is provided with a second pivot hole and a through hole, and the second pivot hole and the through hole both penetrate to the left and right sides of the second vehicle frame, the second vehicle The rear end of the frame is nested with the front end of the first frame, the second pivot hole is opposite to the first pivot hole, the through hole is opposite to the guide hole; and a positioning module has Two positioning blocks, a first locking element, a second locking element, and an elastic force limiter, each of the positioning blocks abuts against the outer surface of the second vehicle frame and the inner surface of the first vehicle frame, and each of the positioning blocks Coaxial with the second pivot hole, the first locking member passes through the first pivot hole, the second pivot hole and the two positioning blocks from one side of the first frame, and is coupled to the The second locking piece on the other side of the first frame can be adjusted by adjusting the first locking piece and the second locking piece so that each positioning block abuts against the outer surface of the second frame and the first locking piece. The active force of the inner surface of the vehicle frame; the elastic limiting component passes through the through hole, and the two ends of the elastic limiting component abut against the guiding hole.

Wherein, the guide hole has a connected small diameter portion and two large diameter portions, the diameter width of each of the large diameter portions is larger than the diameter width of the small diameter portion, and the two large diameter portions are arranged at two ends of the small diameter portion.

Wherein, the elastic force limiting component includes an elastic member and two protrusions, and the two protrusions are respectively connected to the two ends of the elastic member in the axial direction, and a shoulder is provided on the circumferential surface of each protrusion, and the free area of the protrusion is An arc is formed between the end and the shoulder to form a catch part, and the diameter width of the catch part at the place where the shoulder is connected is smaller than the diameter width of the large diameter part of the guide hole and larger than that of the guide hole. the diameter width of the small-diameter portion is such that the locking portion of each of the protrusions penetrates the large-diameter portion of the guide hole, and the shoulder of each of the protrusions abuts against the inner surface of the first frame, or The locking part of each protruding block abuts against the inner surface of the first frame, and passes through the small-diameter part of the guiding hole.

Wherein, the elastic limit assembly is further provided with a shaft tube, the shaft tube runs through the through hole of the second frame, and the shaft tube protrudes through the outer surface of the second frame without contacting the first frame. On the inner surface, the elastic member is accommodated in the shaft tube.

Wherein, the ends of the two protrusions connected with the elastic member are accommodated in the shaft tube.

Wherein, each of the positioning blocks has an inner ring and an outer ring, the inner ring is arranged in the outer ring and is coaxial with the outer ring, an end surface of the inner ring and the outer ring is connected by an abutting surface, the The other end surface of the inner ring protrudes through the other end surface of the outer ring; each of the positioning blocks protrudes through the end surface of the outer ring from the inner ring and penetrates into the second pivot hole, and the end surface of the outer ring abuts against the second pivot hole. The abutting surface abuts against the inner surface of the first frame.

Wherein, the first locking member has an end and a shaft, the end of the first locking member is connected to one end of the shaft, and the other end of the shaft is provided with an internal thread; the second locking member has an end and an external thread part, the end of the second locking part is connected to one end of the external thread part, and the external thread part of the second locking part is screwed with the internal thread of the first locking part.

Wherein, the second vehicle frame includes a sleeve portion and a pivot portion, the front end of the pivot portion is combined with the outer peripheral surface of the sleeve portion, the second pivot hole and the through hole are arranged at the pivot portion The rear end, and goes through to the left and right sides of the pivot joint.

Wherein, the top of the first frame is provided with a seat joint, and the front end of the first frame is provided with a set of interfaces, and the first pivot hole and the guide hole of the first frame are closer to the socket and farther away from it. In the seat cushion joint part, the second frame passes through the socket of the first frame through the rear end of the pivotal part.

Wherein, the bottom of the first frame is provided with an opening leading to the inside.

The above-mentioned folding vehicle frame may further include two third vehicle frames and two retaining modules; the two sides of the rear end of the first vehicle frame are respectively provided with an extension, each of which is provided with a third pivot hole and A latch hole; one end of each of the third frame is provided with a fourth pivot hole and an opening, the two third frames are respectively combined with the corresponding extension, the fourth pivot hole and the third pivot The connecting hole is opposite to each other, and the opening is opposite to the locking through hole; each of the retaining modules includes a third locking member, a fourth locking member and an elastic limiting component, and the third locking member starts from the first locking member. The inner side of the corresponding extension part on the frame passes through the third pivot hole and the fourth pivot hole of the third frame, and is used for locking and coupling the fourth locking member from the outer side of the extension part; In the corresponding third vehicle frame, one end of the elastic limiting component protrudes through the opening of the third vehicle frame, and extends into the locking hole of the corresponding extension part to form a locking mechanism.

Wherein, each of the retaining modules further includes a clamping block and a hook, the clamping block is arranged on the outside of the corresponding third vehicle frame, the clamping block has a slope and a stop surface, the slope of the clamping block is formed by the The top of the block extends obliquely to the outer surface of the third frame, and the stop surface of the block extends vertically from the top of the block to the outer surface of the third frame; the top of the first frame is provided There is a cushion joint part, the cushion joint part is combined with a cushion, the hook is arranged on the side edge of the inner surface of the cushion, the hook has an inclined surface and a blocking surface, and one end edge of the inclined surface of the hook is connected to the On the inner surface of the cushion, one end edge of the stop surface of the hook is connected to the outer surface of the seat cushion, and the stop surface of the hook abuts against the stop surface of the block.

Wherein, the elastic limiting component includes an elastic member and a protrusion, the protrusion of the elastic limiting component is connected to one end of the elastic member in the axial direction of the elastic limiting component, and the circumference of the protrusion of the elastic limiting component There is a shoulder on the surface, and the free end of the projection of the elastic limit assembly is arc-shaped to the shoulder to form a latching portion; the projection of the elastic limit assembly is abutted against the third by the shoulder. The inner wall of the vehicle frame, and the opening protruding from the locking portion to pass through the third vehicle frame.

Wherein, the elastic limit assembly is further provided with a tube seat, the tube seat is arranged in the corresponding third vehicle frame, and the elastic member of the elastic limit assembly is accommodated in the tube seat.

Wherein, the protruding block of the elastic limiting assembly is connected to the end of the elastic member of the elastic limiting assembly and accommodated in the tube seat.

Wherein, the third locking piece has an end and a shaft, the end of the third locking piece is connected to one end of the shaft of the third locking piece, and the other end of the shaft of the third locking piece is provided with an inner thread; the fourth locking member has an end and an external thread portion, the end of the fourth locking member is connected to one end of the external thread portion of the fourth locking member, the external thread portion of the fourth locking member is connected to the first The internal threads of the three locking pieces are screwed together.

Accordingly, the folding frame of the utility model will not be pivoted and folded due to collision or hooking on objects during use, so as to improve the safety of use; The car can also prevent young children from turning the frame into a pivotable and foldable state, so as to reduce unnecessary accidents.

Description of drawings

Figure 1: A schematic plan view of a scooter with a conventional folding positioning structure.

Fig. 2: A schematic cross-sectional structure diagram of an existing folding positioning structure.

Fig. 3: A schematic diagram of the three-dimensional structure of the first embodiment of the utility model.

Fig. 4: A schematic diagram of a three-dimensional exploded structure of the first embodiment of the utility model.

Fig. 5: A schematic diagram of a partial three-dimensional exploded structure of the first embodiment of the utility model.

Fig. 6: A partial cross-sectional plan view of the first embodiment of the utility model in an unfolded state.

Fig. 7: Schematic diagram of the cross-sectional structure of the section line 7-7 in Fig. 6 .

Fig. 8: A schematic cross-sectional structural view of the first embodiment of the present invention when the first frame and the second frame pivot relative to each other.

Fig. 9: A schematic plan view of the first embodiment of the utility model in a folded state.

Fig. 10: A schematic diagram of the three-dimensional structure of the second embodiment of the utility model.

Fig. 11: A schematic diagram of a three-dimensional exploded structure of the second embodiment of the present invention.

Fig. 12: A schematic diagram of a partial perspective plane structure of the second embodiment of the present invention in an unfolded state.

Fig. 13: Schematic cross-sectional structure diagram of section line 13-13 in Fig. 12 .

Fig. 14: A schematic plan view of the second embodiment of the utility model in a folded state.

Fig. 15: A partially enlarged cross-sectional view of Fig. 14 .

【Symbol Description】

1 First frame 11 Cushion junction 12 Opening 13 Wheel pivot joint

14 sockets 15 first pivot hole 16 guide hole 161 small diameter part

162 Large diameter part 17 Extension part 171 Third pivot hole 172 Locking hole

2 Second frame 21 Sleeve part 22 Pivot part 221 Second pivot hole

222 through hole 3 positioning module 31 positioning block 311 inner ring

312 outer ring 313 contact surface 32 first locking piece 321 end

322 shaft 323 internal thread 33 second locking piece 331 end

332 external thread part 34 elastic limit assembly 341 elastic piece 342 bump

343 Shoulder 344 Buckle 345 Axle Tube 4 Third Frame

41 The fourth pivot joint hole 42 Opening hole 43 Wheel pivot joint 5 Retaining module

51 Third locking piece 511 End 512 Shaft 513 Internal thread

52 The fourth locking piece 521 End 522 External thread part 53 Elastic limit component

531 elastic piece 532 bump 533 shoulder 534 catch

535 pipe seat 54 block 541 inclined plane 542 stop surface

55 hook 551 slope 552 stop surface B pedal

C Pedal Storage Rack D Fork Rack F Front Wheel H Grip

P shaft rod R rear wheel S seat cushion

﹝used to use﹞

9 folding positioning structure 91 square tube 92 fixed seat 921 vertical plate

922 Pivot hole 923 Arc track hole 924 Recessed part 93 Positioning component

931 quick release screw 932 nut 933 spring 934 positioning bolt

935 cam wrench 936 flange A scooter handle member B scooter body.

Detailed ways

In order to make the above and other purposes, features and advantages of the present utility model more obvious and easy to understand, the following specifically cites the embodiments of the present utility model, together with the accompanying drawings, for a detailed description as follows:

Please refer to Fig. 3, it is the first embodiment of the utility model folding vehicle frame, and this folding vehicle frame generally comprises a first vehicle frame 1, a second vehicle frame 2 and a positioning module 3, by this positioning The module 3 limits whether the first frame 1 and the second frame 2 can pivot relative to each other.

Wherein, the folding frame can be of any structure and size. In terms of structure, the folding frame can be a vehicle body base frame of different models such as bicycles, scooters, and scooters; and, the The folding vehicle frame can be a two-wheeled vehicle body base frame, a tricycle body base frame, or other structural types of vehicle body base frames; in addition, in terms of size, the folding vehicle frame can be a vehicle body base frame used by ordinary adults, It can also be a small body base frame for young children. Therefore, the folding frame of the utility model can be adjusted according to the needs of use, which can be understood by those with ordinary knowledge in the technical field to which the utility model belongs, and the utility model is not limited; the first embodiment of the utility model is hereby Take the folding frame as an example of a two-wheeled scooter for children to explain.

Please refer to Figures 3 and 4, the top of the first vehicle frame 1 is provided with a cushion joint 11 for setting a cushion S, and the bottom of the first vehicle frame 1 is provided with an opening 12 leading to the inside; The rear end of the vehicle frame 1 is provided with a wheel pivot joint 13 for pivotally connecting a rear wheel R; the front end of the first vehicle frame 1 is provided with a set of interface 14 for fitting the second vehicle frame 2, The front end of a vehicle frame 1 is further provided with a first pivot hole 15 and a guide hole 16, and the first pivot hole 15 and the guide hole 16 are closer to the socket 14 and farther away from the cushion joint 11, and Both the first pivot hole 15 and the guide hole 16 extend to the left and right sides of the first frame 1 . Wherein, please refer to FIG. 5 , the guide hole 16 has a connected small diameter portion 161 and two large diameter portions 162, the small diameter portion 161 of the guide hole 16 is approximately a quarter arc, each of the large The diameter of the diameter portion 162 is larger than the diameter of the small diameter portion 161 , and the two large diameter portions 162 are disposed at two ends of the small diameter portion 161 .

Please refer to Figures 4 and 5, the second frame 2 includes a sleeve portion 21 and a pivot portion 22, the sleeve portion 21 can pass through a shaft P, and one end of the shaft P is provided with a gripping portion H is for the user to hold, and the other end of the shaft P is provided with a fork D for pivoting a front wheel F. The front end of the pivot portion 22 is combined with the outer peripheral surface of the sleeve portion 21, and the rear end of the pivot portion 22 is provided with a second pivot hole 221 and a through hole 222, the second pivot hole 221 and the through hole 222 Both go through to the left and right sides of the pivot joint 22 of the second frame 2; the second frame 2 is inserted into the socket 14 of the first frame 1 from the rear end of the pivot joint 22, and The second pivot hole 221 is opposite to the first pivot hole 15 , and the through hole 222 is opposite to the guide hole 16 .

Please refer to Figures 5-7, the positioning module 3 includes two positioning blocks 31, a first locking member 32 and a second locking member 33, each of the positioning blocks 31 has an inner ring 311 and an outer ring 312, the inner ring 311 The ring 311 is arranged in the outer ring 312 and is coaxial with the outer ring 312. One end surface of the inner ring 311 and the outer ring 312 is connected by an abutment surface 313, and the other end surface of the inner ring 311 protrudes through out of the other end surface of the outer ring 312; the two positioning blocks 31 are respectively arranged between the outer surface of the pivot joint 22 of the second vehicle frame 2 and the inner surface of the socket 14 of the first vehicle frame 1, each positioning Blocks 31 protrude from the inner ring 311 and pass through the end surface of the outer ring 312 to penetrate the second pivot hole 221 of the pivot portion 22, so that each positioning block 31 is coaxial with the second pivot hole 221, and the other The end surface of the outer ring 312 abuts against the outer surface of the pivot portion 22 , and the abutting surface 313 abuts against the inner surface of the first frame 1 .

The first locking member 32 passes through the first pivot hole 15 of the first frame 1 and the second pivot hole 221 of the second frame 2 from one side (for example, the left side) of the first frame 1 and the two positioning blocks 31, and combined to the second locking member 33 located on the other side (for example, the right side) of the first frame 1; for example, the first locking member 32 can be a threaded screw, the second locking member 33 corresponds to a nut, or as shown in the drawings of this embodiment, the first locking member 32 is a screw with internal threads, and the second locking member 33 is Corresponding to a screw with external thread. Specifically, the first locking member 32 has an end 321 and a shaft 322, the end 321 is connected to one end of the shaft 322, and the other end of the shaft 322 is provided with an internal thread 323; the second lock The fastener 33 has a terminal 331 and an external threaded portion 332, the terminal 331 is connected to one end of the external threaded portion 332, the external threaded portion 332 can be screwed with the internal thread 323 of the first locking member 32, and is formed by The screwing length between the second locking member 33 and the first locking member 32 controls the distance between the two ends 321, 331, thereby controlling the pivot joint between the first frame 1 and the second frame 2 22 can be relatively pivoted (detailed later).

The positioning module 3 further includes an elastic limiting component 34, the elastic limiting component 34 passes through the through hole 222 of the second frame 2, and the pivot portion 22 of the second frame 2 is relatively to the first frame. 1 When pivoting, the two ends of the elastic limiting component 34 produce relative displacement in the small diameter portion 161 of the guide hole 16 of the first vehicle frame 1, and are aligned to the large diameter portion 162 of the guide hole 16 At this time, the protrusion protrudes through the outer surface of the first frame 1 , so that the elastic limiting component 34 and the first frame 1 form a latch. In this embodiment, the elastic limiting component 34 may include an elastic member 341 and two protrusions 342, the elastic member 341 can produce axial elastic deformation, such as a compression spring, and the two protrusions 342 are respectively connected to the At the two axial ends of the elastic member 341, a shoulder 343 is provided on the circumferential surface of each protrusion 342, and the free end of the protrusion 342 (the end not connected with the elastic member 341 is the free end) reaches the shoulder 343 It is arc-shaped to form a catch portion 344, and the diameter width of the catch portion 344 at the place where the shoulder portion 343 is connected is slightly smaller than the diameter width of the large diameter portion 162 of the guide hole 16, but larger than the guide hole The diameter of the small diameter portion 161 of 16 is wide.

In addition, the elastic limiting component 34 is preferably further provided with a shaft tube 345 , the shaft tube 345 passes through the through hole 222 of the second frame 2 , and the shaft tube 345 protrudes through the pivot joint of the second frame 2 . portion 22 without touching the inner surface of the first frame 1, the inner diameter of the axle tube 345 is slightly larger than the outer diameter of the elastic member 341, so that the elastic member 341 is accommodated in the axle tube 345 to To avoid the buckling phenomenon of the elastic member 341 when elastically deforming in the axial direction; in addition, the ends of the two protrusions 342 connected to the elastic member 341 are also preferably maintained in the shaft tube 345 to ensure The two protrusions 342 are only displaced along the axial direction of the elastic member 341 .

According to the aforementioned structure, when the foldable frame is unfolded as shown in Figure 6, please refer to Figures 5 and 7 at the same time. One of the large diameter portions 162 of the guide hole 16, and the user can tighten the second locking member 33 so that the end 321 of the first locking member 32 and the end 331 of the second locking member 33 are as close as possible , to force the inner surface of the first vehicle frame 1 to clamp the two positioning blocks 31 by means of the two ends 321, 331, so that the abutting surface 313 of each positioning block 31 is pressed against the inner surface of the first vehicle frame 1 The surface, and the end surface of the outer ring 312 of each positioning block 31 abuts against the outer surface of the pivot portion 22 , so that the pivot portion 22 of the second frame 2 cannot pivot relative to the first frame 1 .

When the foldable frame is to be folded, the user only needs to unscrew the second locking member 33 to shorten the screw length between the second locking member 33 and the first locking member 32, that is, to increase the length of the first locking member. The distance between the end 321 of 32 and the end 331 of the second locking member 33 is such that the end 331 of the second locking member 33 is no longer pressed against the outer surface of the first vehicle frame 1, so that the two positioning The block 31 only touches but no longer abuts against the inner surface of the first frame 1 and the outer surface of the pivot portion 22; in this way, the user only needs to pull the first frame 1 or the second frame 2 , that is, the pivoting portion 22 of the second frame 2 is pivoted relative to the first frame 1 .

Wherein, since the locking portion 344 of each of the protrusions 342 is arc-shaped, when the pivoting portion 22 of the second frame 2 pivots relative to the first frame 1, it can be directly controlled by the first frame 1. The end edge of the large-diameter portion 162 of the guide hole 16 exerts force on the locking portion 344 of each of the protrusions 342, so that the two protrusions 342 are retracted to compress the elastic member 341 together, so that the elastic limiter assembly 34 Relative displacement can be generated in the small-diameter portion 161 of the guide hole 16, and the locking portion 344 of each of the protrusions 342 abuts against the inner surface of the first frame 1, and only partially penetrates the guide hole 16 In the small diameter portion 161 of the guide hole 16 (as shown in FIG. 8 ); until the two protrusions 342 are aligned to the other large diameter portion 162 of the guide hole 16, the elastic return of the elastic member 341 is used to push against the two protrusions. The block 342 is displaced, so that the shoulder 343 of the two protrusions 342 abuts against the inner surface of the first frame 1 again, and the latching portion 344 of the two protrusions 342 passes through the large diameter portion of the guide hole 16 162 to form a locking mechanism with the first frame 1 . Then the user tightens the second locking member 33 again, so that the pivot joint 22 of the second frame 2 can no longer pivot relative to the first frame 1, and the foldable frame appears as shown in FIG. 9 . displayed folded status.

Referring to Fig. 9, when the foldable frame is in the folded state, the opening 12 at the bottom of the first frame 1 can also be used for storing part of the front wheels F, so as to further reduce the size of the foldable frame with wheels assembled. The folded volume. Relatively, when wanting to return the folding frame from the folded state to the unfolded state, as long as the second locking member 33 is unscrewed, and the first frame 1 or the second frame 2 is reversed, the Make the pivoting portion 22 of the second frame 2 pivot relative to the first frame 1, and when the two protrusions 342 return to the original large diameter portion 162, tighten the second locking member 33; therefore, when the utility model folding frame wants to change the folded state, it only needs to unscrew or tighten the second locking member 33, and it is not necessary to remove the second locking member 33 entirely, so use The convenience of operation is excellent.

Please refer to Fig. 10, which is the second embodiment of the folding frame of the present invention. The second embodiment is to be described as an example of a folding frame for a children's tricycle. The folding frame can be assembled with a Front wheel F and two rear wheels R. In this embodiment, the folding frame generally includes a first frame 1 , a second frame 2 , a positioning module 3 , two third frames 4 and two retaining modules 5 . The front wheel F is assembled on the second vehicle frame 2 ; one of the rear wheels R is assembled on one of the third vehicle frames 4 , and the other rear wheel R is assembled on the other third vehicle frame 4 . The positioning module 3 can limit whether the second frame 2 can pivot relative to the first frame 1; the two retaining modules 5 can respectively limit whether the corresponding third frame 4 can pivot relative to the first frame. Frame 1 pivots.

Please refer to Figures 10 and 11, the structure of the first vehicle frame 1 is substantially the same as that of the above-mentioned first embodiment, except the above-mentioned seat cushion joint 11, opening 12, socket 14, first pivot hole 15 and guide In addition to the hole 16 , an extension portion 17 is respectively provided on two sides of the rear end of the first frame 1 for connecting the two third frames 4 . Each of the extending portions 17 defines a third pivot hole 171 and a locking through hole 172 .

The structure of the second vehicle frame 2 is also substantially the same as that of the above-mentioned first embodiment. In addition to the above-mentioned bushing portion 21 and pivot portion 22, the front wheel F pivotally connected to the fork frame D can also The two sides are engaged with a pedal B respectively, and a pedal storage frame C may also be provided on the sleeve portion 21 for placing the two pedals B disassembled from both sides of the axle center of the front wheel F.

The structure of the positioning module 3 is the same as that of the above-mentioned first embodiment, and the positioning module 3 can limit whether the first frame 1 and the second frame 2 can pivot relative to each other, so that the first frame 1 and the second vehicle frame 2 are folded into the folded state as shown in FIG. 14 . The detailed structure and action description of the positioning module 3 have been described above, and will not be repeated here.

More importantly, please refer to Figures 11 and 12, the folding frame of this embodiment is provided with the two third frames 4, and one end of each of the third frames 4 is provided with a fourth pivot hole 41 and an opening 42 The two third frames 4 are respectively combined with the corresponding extension parts 17, and the fourth pivot hole 41 is opposite to the third pivot hole 171, and the opening 42 is opposite to the latch through hole 172. bit. The other end of each third frame 4 is provided with a wheel pivot portion 43 for pivotally connecting the rear wheel R. As shown in FIG.

Please refer to Figures 11 and 13, each of the retaining modules 5 includes a third locking member 51 and a fourth locking member 52, the third locking member 51 penetrates from the inside of the corresponding extension 17 on the first frame 1 The third pivot hole 171 and the fourth pivot hole 41 of the third frame 4 are used for locking and coupling the fourth locking member 52 from the outside of the extension portion 17 . For example, the third locking member 51 can be a screw with external threads, and the fourth locking member 52 is correspondingly a nut, or as shown in the drawings of this embodiment, the third locking member 51 is A screw with an internal thread, the fourth locking member 52 corresponds to a screw with an external thread. Specifically, the third locking member 51 has an end 511 and a shaft 512, the end 511 is connected to one end of the shaft 512, and the other end of the shaft 512 is provided with an internal thread 513; the fourth lock The fastener 52 has an end 521 and an external threaded portion 522, the end 521 is connected to one end of the external threaded portion 522, the external threaded portion 522 can be screwed with the internal thread 513 of the third locking member 51, and is formed by The threaded length between the fourth locking member 52 and the third locking member 51 controls the distance between the two ends 511, 521, thereby controlling whether the corresponding third frame 4 can pivot relative to the first frame 1. Turn (details later).

Each of the retaining modules 5 further includes an elastic limiting component 53, the elastic limiting component 53 is arranged in the corresponding third vehicle frame 4, and one end of the elastic limiting component 53 protrudes through the third vehicle frame 4, and extend into the corresponding locking through hole 172 of the extension 17 to form a locking. In this embodiment, the elastic limiting component 53 may include an elastic member 531 and a protrusion 532, the elastic member 531 can produce axial elastic deformation, such as a compression spring, the protrusion 532 is connected to the elastic member 531 on the axial end, the circumferential surface of the protrusion 532 is provided with a shoulder 533, and the free end of the protrusion 532 is arc-shaped to the shoulder 533 to form a locking portion 534; the protrusion 532 The shoulder 533 abuts against the inner wall of the third frame 4 , and the locking portion 534 protrudes through the opening 42 of the third frame 4 .

In addition, the elastic limit assembly 53 can also be provided with a pipe seat 535, which is arranged in the corresponding third vehicle frame 4, the inner diameter of the pipe seat 535 is slightly larger than the outer diameter of the elastic member 531, the elastic The member 531 is accommodated in the tube seat 535, so as to avoid buckling phenomenon of the elastic member 531 when elastically deforming in the axial direction; and, the end of the projection 532 connected to the elastic member 531 is also preferably maintained in the The socket 535 ensures that the protrusion 532 is only displaced along the axial direction of the elastic member 531 .

Please refer to FIGS. 11 and 12 , each of the retaining modules 5 may further include a locking block 54 and a hook 55 . The clamping block 54 is arranged on the outside of the corresponding third vehicle frame 4, and the clamping block 54 can be combined with the third vehicle frame 4 by bonding, locking, buckling, etc., or integrally connected with the third vehicle frame 4. rack 4. Please refer to FIG. 15, the block 54 has an inclined surface 541 and a stop surface 542, the inclined surface 541 extends obliquely from the top of the block 54 to the outer surface of the third frame 4 to guide the block The hook 55 slides from the outer surface of the third frame 4 to the top of the block 54 . The stop surface 542 extends vertically from the top of the block 54 to the outer surface of the third vehicle frame 4, so that the hook 55 slides from the top of the block 54 to the stop surface 542, and it is difficult to Slide back to the top of the block 54 in the opposite direction. Wherein, the inclined surface 541 and the blocking surface 542 can be connected at the top of the block 54 , or separated by a plane.

In this embodiment, the hook 55 interlocking with the block 54 can be optionally provided on the seat cushion S combined with the first frame 1, and the hook 55 is provided on the side of the inner surface of the seat cushion S The hook 55 has an inclined surface 551 and a stop surface 552. One end edge of the inclined surface 551 is connected to the inner surface of the cushion S, and one end edge of the stop surface 552 is connected to the outer surface of the seat cushion S. The other edge of the inclined surface 551 and the blocking surface 552 can be connected, or separated by a plane. Accordingly, the slope 541 of the block 54 can slide relative to the slope 551 of the hook 55, and after the hook 55 slides from the top of the block 54 to the stop surface 542, the hook The blocking surface 552 of 55 abuts against the blocking surface 542 of the locking block 54 , so that the locking block 54 and the hook 55 are engaged with each other and are not easy to reversely slide.

According to the aforementioned structure, when the foldable frame is unfolded as shown in Figures 10 and 12, please refer to Figure 13 at the same time. the opening 42 of the third vehicle frame 4, and the user can tighten the fourth locking member 52 so that the end 511 of the third locking member 51 and the end 521 of the fourth locking member 52 are as close as possible to The third frame 4 is pressed against the extension portion 17 of the first frame 1 by the two ends 511 , 521 , so that the third frame 4 cannot pivot relative to the first frame 1 .

When the foldable vehicle frame is to be folded, the pivoting and positioning details of the second vehicle frame 2 relative to the first vehicle frame 1 are described in detail in the aforementioned first embodiment, and will not be repeated here; and For the folding of the second and third vehicle frames 4, the user only needs to unscrew the fourth locking member 52 to shorten the threaded length between the fourth locking member 52 and the third locking member 51, that is, to increase the length of the second locking member 52. The distance between the end 511 of the third locking member 51 and the end 521 of the fourth locking member 52 is such that the end 521 of the fourth locking member 52 no longer touches the outer surface of the third vehicle frame 4, so that The third frame 4 only touches but no longer abuts against the extension 17 of the first frame 1; in this way, the user only needs to pull the first frame 1 or the third frame 4 to The third vehicle frame 4 is pivoted relative to the first vehicle frame 1, so that the folding vehicle frame presents a folded state as shown in FIG. 14 .

Wherein, since the catch portion 534 of the projection 532 is arc-shaped, when the third frame 4 pivots relative to the first frame 1, it can directly pass through the hole 172 of the catch hole 172 of the first frame 1 . The end edge exerts force on the engaging portion 534 of the protruding block 532 , so that the protruding block 532 compresses the elastic member 531 and retracts into the opening 42 of the third frame 4 . On the other hand, please refer to FIG. 15 , when the third frame 4 pivots relative to the first frame 1 , the block 54 provided on the third frame 4 can be moved relative to the hook 55 by its slope 541 . The slope 551 of the hook 55 slides, and after the hook 55 slides from the top of the block 54 to the stop surface 542, the stop surface 552 of the hook 55 abuts against the stop surface 542 of the block 54 , so that the locking block 54 and the hook 55 are engaged with each other so that it is difficult to reversely slide. Referring to FIGS. 13 and 14 , the user tightens the fourth locking member 52 again, so that the third frame 4 can no longer pivot relative to the first frame 1 .

On the contrary, when wanting to return the folding frame from the folded state to the unfolded state, only need to unscrew the fourth locking member 52, and apply force to pull the first frame 1 or the third frame 4 in reverse, The hook 55 can be slightly elastically deformed to release the locking state between the block 54 and the hook 55, so that the third frame 4 can pivot relative to the first frame 1 , and when the protruding block 532 penetrates into the locking through hole 172 again, the fourth locking member 52 can be tightened.

In summary, the folding frame of the present invention can pivot the second frame relative to the first frame only when the second locking element is unscrewed, and the second locking element and the first The locking piece is firmly combined by screwing, and only a small-sized end is exposed on the outer surface of the first frame, so it can be ensured that the second locking piece will not be damaged due to collision or hooking into an object during use. Unscrewing, thereby ensuring that the first vehicle frame and the second vehicle frame will not become pivotable and foldable at one time, so as to achieve the effect of greatly improving the safety of use.

In addition, even if the foldable bicycle frame of the present invention is used on a vehicle for young children to ride on (such as a bicycle for young children, a slide car, etc.), the second locking member can be loosened or tightened because the young child cannot use tools. , thereby effectively preventing young children from turning the frame into a pivotable and foldable state by themselves, helping to reduce unnecessary accidents and improve use safety.

Also, when the folding frame of the present invention is a three-wheeled frame, the second and third frames assembled with the second rear wheels can also be folded and positioned by means of the second retaining module, so as to further reduce the folded volume. Effect.

Claims (10)

1. A folding frame, characterized in that it comprises: A first frame, the front end is provided with a first pivot hole and a guide hole, the first pivot hole and the guide hole both penetrate to the left and right sides of the first frame; A second vehicle frame, the rear end is provided with a second pivot hole and a through hole, the second pivot hole and the through hole both penetrate to the left and right sides of the second vehicle frame, the second vehicle frame The rear end of the frame is nested with the front end of the first frame, the second pivot hole is opposite to the first pivot hole, and the through hole is opposite to the guide hole; and A positioning module has two positioning blocks, a first locking member, a second locking member and an elastic limiter, and each positioning block abuts against the outer surface of the second vehicle frame and the outer surface of the first vehicle frame On the inner surface, each positioning block is coaxial with the second pivot hole, and the first locking member passes through the first pivot hole, the second pivot hole and the two pivot holes from one side of the first frame. The positioning block is combined with the second locking piece arranged on the other side of the first vehicle frame. By adjusting the first locking piece and the second locking piece, each positioning block can be adjusted to abut against the second vehicle frame. The active force of the outer surface of the frame and the inner surface of the first frame; the elastic limiting component passes through the through hole, and the two ends of the elastic limiting component abut against the guiding hole. 2. The folding bicycle frame according to claim 1, wherein the guide hole has a small-diameter portion and two large-diameter portions connected thereto, and the diameter width of each of the large-diameter portions is larger than the diameter width of the small-diameter portion , the two large-diameter portions are arranged at both ends of the small-diameter portion. 3. The folding vehicle frame according to claim 2, wherein the elastic limit assembly comprises an elastic member and two protrusions, and the two protrusions are respectively connected to two axial ends of the elastic member, each The circumferential surface of the protrusion is provided with a shoulder, and the free end of the protrusion is arc-shaped to the shoulder to form a locking part, and the diameter width of the locking part at the connection with the shoulder is smaller than the The diameter width of the large-diameter part of the guide hole is larger than the diameter width of other parts of the guide hole, and the locking part of each of the protrusions can pass through the large-diameter part of the guide hole and each of the protrusions The shoulder abuts against the inner surface of the first vehicle frame, or the catch portion of each of the protrusions can abut against the inner surface of the first vehicle frame and pass through the small diameter portion of the guide hole; the elastic limit The bit assembly is further provided with a shaft tube, the shaft tube passes through the through hole of the second vehicle frame, and the shaft tube protrudes through the outer surface of the second vehicle frame without contacting the inner surface of the first vehicle frame. The elastic part is accommodated in the shaft tube; the ends of the two protrusions connected to the elastic part are accommodated in the shaft tube. 4. The folding vehicle frame according to any one of claims 1 to 3, wherein each positioning block has an inner ring and an outer ring, and the inner ring is arranged in the outer ring and connected to the outer ring Coaxial, one end surface of the inner ring and the outer ring is connected by an abutment surface, the other end surface of the inner ring protrudes through the other end surface of the outer ring; each positioning block protrudes through the inner ring The end surface of the outer ring passes through the second pivot hole, the end surface of the outer ring abuts against the outer surface of the second frame, and the abutting surface abuts against the inner surface of the first frame. 5. The folding frame according to any one of claims 1 to 3, wherein the first locking member has an end and a shaft, and the end of the first locking member is connected to the shaft One end of the shaft, the other end of the shaft is provided with an internal thread; the second lock has an end and an external thread, the end of the second lock is connected to one end of the external thread, the second lock The external thread portion of the fastener is screwed with the internal thread of the first locking member. 6. The folding frame according to any one of claims 1 to 3, wherein the second frame comprises a sleeve portion and a pivot portion, and the front end of the pivot portion is combined with the sleeve part, the second pivot hole and the through hole are located at the rear end of the pivot part, and penetrate to the left and right sides of the pivot part; the top of the first frame is provided with a seat cushion joint part, the front end of the first frame is provided with a socket, the first pivot hole and the guide hole of the first frame are closer to the socket and farther away from the seat joint, and the second frame is formed by the The rear end of the pivot joint passes through the socket of the first frame; the bottom of the first frame is provided with an opening leading to the inside. 7. The folding vehicle frame according to any one of claims 1 to 3, characterized in that, it further comprises two third vehicle frames and two retaining modules; the rear ends of the first vehicle frame are respectively An extension is provided, each of which is provided with a third pivot hole and a catch hole; one end of each third frame is provided with a fourth pivot hole and an opening, and the two third The vehicle frame is respectively combined with the corresponding extension part, the fourth pivot hole is opposite to the third pivot hole, and the opening is opposite to the locking through hole; each of the retaining modules includes a third locking piece, A fourth locking member and an elastic limiter assembly, the third locking member passes through the third pivot hole and the fourth pivot hole of the third frame from the inner side of the corresponding extension on the first frame, and The fourth locking member is locked and combined from the outside of the extension; the elastic limit assembly is arranged in the corresponding third frame, and one end of the elastic limit assembly protrudes through the opening of the third frame, And it can extend into the locking through hole of the corresponding extension part to form the locking. 8. The folding vehicle frame according to claim 7, wherein each of the retaining modules further comprises a clamping block and a grabbing hook, the clamping block is arranged on the outside of the corresponding third vehicle frame, and the clamping block has A slope and a stop surface, the slope of the block extends obliquely from the top of the block to the outer surface of the third frame, and the stop surface of the block extends from the top of the block to the third frame The outer surface of the frame extends vertically; the top of the first vehicle frame is provided with a cushion joint part, and the cushion joint part is combined with a cushion, and the hook is arranged on the side edge of the inner surface of the cushion, and the hook has a An inclined surface and a stop surface, one end edge of the inclined surface of the hook is connected to the inner surface of the cushion, one end edge of the stop surface of the hook is connected to the outer surface of the cushion, and the stop surface of the hook can abut against the The blocking surface of the block. 9. The folding bicycle frame according to claim 7, wherein the elastic limit assembly includes an elastic member and a protrusion, and the protrusion of the elastic limit assembly is connected to the axial direction of the elastic member of the elastic limit assembly. On the upper end, the circumferential surface of the projection of the elastic limit assembly is provided with a shoulder, and the free end of the projection of the elastic limit assembly is arc-shaped to the shoulder to form a locking part; The projection of the elastic limit assembly abuts against the inner wall of the third vehicle frame from the shoulder, and protrudes through the opening of the third vehicle frame from the locking part; the elastic limit assembly is also provided with a tube Seat, the tube seat is arranged in the corresponding third vehicle frame, the elastic part of the elastic limit assembly is accommodated in the tube seat; the protrusion of the elastic limit assembly is connected to the elastic part of the elastic limit assembly The end is accommodated in the socket. 10. The folding bicycle frame according to claim 7, wherein the third locking element has an end and a shaft, and the end of the third locking element is connected to the shaft of the third locking element One end, the other end of the shaft of the third locking piece is provided with an internal thread; the fourth locking piece has an end and an external thread portion, and the end of the fourth locking piece is connected to the outer surface of the fourth locking piece At one end of the threaded part, the external threaded part of the fourth locking part is screwed with the internal thread of the third locking part.