CN111301588A

CN111301588A - Magnetic folding positioning portable vertical bicycle

Info

Publication number: CN111301588A
Application number: CN202010109581.8A
Authority: CN
Inventors: 庞明方
Original assignee: Taicang Chezhongbao Leisure Products Co Ltd
Current assignee: Taicang Chezhongbao Leisure Products Co Ltd
Priority date: 2020-02-22
Filing date: 2020-02-22
Publication date: 2020-06-19

Abstract

A magnetic folding positioning portable vertical bicycle comprises a telescopic double-rotation type handlebar, a front fork, a front piece, a middle beam, a folding connecting piece, a towing wheel piece, a rear fork piece, a front wheel, a rear wheel and a driving mechanism, wherein the telescopic double-rotation type handlebar is formed by connecting a left handle, a right handle, an upper locking piece and a lower locking piece, the front piece is rotationally connected with a front shaft tube, the middle beam is rotationally connected with the front piece, the middle beam is a beam tube, the front connecting piece, the locking quick detach of the front connecting piece, the lower magnetic attraction, the latch hook piece and the front wheel buckle are connected to form the structure, the beam pipe is sleeved with the folding connecting piece and the tug piece, the folding connecting piece is connected with the rear fork piece in a rotating mode, the rear fork piece is formed by connecting two rear fork pieces, a five-way pipe and a shock absorbing piece, the shock absorbing block leans against a tug frame of the tug piece to generate a shock absorbing effect, the two rear fork pieces are connected with the rear wheel, the front wheel is installed on the front fork, and the driving mechanism is composed of a middle shaft, two cranks, a chain wheel, two pedals, a flywheel and a chain.

Description

Magnetic folding positioning portable vertical bicycle

The technical field is as follows:

the invention relates to a folding portable bicycle, in particular to a magnetic folding positioning portable vertical bicycle which can be folded to be small enough and has high folding speed.

Background art:

there are many folding bicycles in the existing market, folding bicycle that folding speed is a little faster, folding bicycle's volume is still great after folding, and folding bicycle that slightly folds for a short time, folding speed is very slow.

The invention content is as follows:

the invention aims to provide a magnetic folding positioning portable vertical bicycle which has high folding speed and can be folded to be small enough. The object of the invention is thus achieved; portable vertical bicycle of folding location of magnetism, including flexible dual-rotary formula handlebar, front fork, front part, centre sill, folding even piece, tow wheel spare, back vent spare, front wheel, rear wheel and actuating mechanism, characterized by: the telescopic double-rotation type handlebar comprises a left handle, a right handle, an upper locking piece and a lower locking piece, wherein the left handle and the right handle are both composed of a vertical handlebar tube and a horizontal handlebar tube, the vertical handlebar tube is formed by connecting a vertical handlebar head and a vertical handlebar tube, the vertical handlebar head is connected to the top end of the vertical handlebar tube, an omega-shaped connector is arranged on the vertical handlebar head, the vertical handlebar head is connected with the horizontal handlebar tube through the omega-shaped connector, the right end of the horizontal handlebar tube of the left handle and the left end of the horizontal handlebar tube of the right handle are respectively sleeved with a locking ring, and the vertical handlebar tube further comprises a bottom ring; the upper lock piece comprises a handle base, two nylon lining rings, an upper lock connecting piece, two lock connecting rings and two positioning rings, wherein the left end and the right end of the handle base are respectively provided with an upward and downward slotted round hole, a slot of the slotted round hole at the left end of the handle base is opposite to a slot of the slotted round hole at the right end, a longitudinal mutual opposite penetrating hole is formed in the vertical direction of the slot of the slotted round hole at the left end of the handle base, a longitudinal mutual opposite penetrating hole is formed in the vertical direction of the slot of the slotted round hole at the right end of the handle base, the longitudinal mutual opposite penetrating hole on the slot of the slotted round hole at the left end of the handle base and the longitudinal mutual opposite penetrating hole on the slot of the slotted round hole at the right end of the handle base are respectively provided with a pair of bolt and nuts, a nylon is respectively embedded in the slotted round hole at the left end and the slotted round hole at the right end of the handle base, the lining ring locking piece comprises a U-shaped clamp, the U-shaped clamp is formed by connecting a J-shaped seat and a locking tongue, the J-shaped seat is connected with the middle part of the handle base through a bolt, an upper quick-release part is connected with the J-shaped seat and the locking tongue, the U-shaped clamp formed by the J-shaped seat and the locking tongue can be tightened by the upper quick-release part, a locking ring at the right end of the horizontal tube of the left handle and a locking ring at the left end of the horizontal tube of the right handle are locked by the U-shaped clamp after being unfolded, a vertical tube of the left handle and a vertical tube of the right handle are connected in nylon lining rings at the left end and the right end of the handle base, a pair of bolts and nuts in a longitudinal pair of through holes on a slit of the slit round hole at the left end of the handle base are screwed, the handle base is provided with a slotted round hole at the right end, and the slotted round hole at the left end and the slotted round hole at the right end are tightly clamped to the handle vertical pipe of the left handle and the handle vertical pipe of the right handle, which can rotate but are not loosened to be proper; the lower locking piece consists of a lower clamping piece and a lower quick release part, wherein the left front end and the right front end of the lower clamping piece are respectively provided with an up-down slotted round hole, the slot of the slotted round hole at the left front end of the lower clamping piece faces the front, the slot of the slotted round hole at the right front end of the lower clamping piece faces the front, the left side of the slot of the slotted round hole at the left front end of the lower clamping piece is provided with a forward left lug, the right side of the slot of the slotted round hole at the right front end of the lower clamping piece is provided with a forward right lug, the middle part of the lower clamping piece is provided with a forward convex block, a mutual transverse through hole is arranged among the left lug, the convex block and the right lug of the lower clamping piece, the middle part of the left side of the lower clamping piece is provided with a vertical round hole, the slotted round hole at the left rear end of the lower clamping piece is fixedly connected with the front shaft tube, the rear end of the right side of the, the left handle and the right handle penetrate through vertical round holes at the left front end and the right front end of the lower clamp, two bottom rings are fixedly sleeved at the bottom end of a handle vertical pipe of the left handle and the bottom end of a handle vertical pipe of the right handle respectively, the lower quick-release device is arranged in a transverse through hole formed by a left lug, a convex block and a right lug of the lower clamp, the lower quick-release device can tighten a slotted round hole at the left end of the lower clamp and a slotted round hole at the right end of the lower clamp, the left handle and the right handle in the lower clamp are fixed, and a front shaft tube is further arranged in a vertical round hole at the rear end of the lower clamp; the front end of the front part is rotationally connected with the front axle tube, the front end of the middle beam is rotationally connected with the front part, the middle beam comprises a beam tube, a front connecting part, a locking and quick-release front connecting part and a lower magnet, the middle beam locking hook piece and the front wheel buckle are respectively arranged at the front end part of the beam tube, the front connecting piece is locked and quickly disassembled and is arranged at the upper end part of the front connecting piece, the middle beam locking hook piece can be locked and connected with the rear upper end of the front piece, the front connecting piece is locked and quickly disassembled and can lock the front connecting piece and the front piece, the middle rear part of the beam tube is sleeved with the folding connecting piece, the rear end of the beam tube is sleeved with the towing wheel piece, the front wheel buckle is fixedly arranged on the left side of the rear end part of the beam tube, the left part of the folding connecting piece is provided with a longitudinal rectangular slotted hole, the right part of the folding connecting piece is provided with a part with a groove-shaped part with a downward opening, the lower end parts of two sides of the groove-shaped part of the folding connecting piece are provided with a pair of transverse through holes, and the pair of transverse through holes of two sides of the groove-shaped part; the rear fork piece is composed of two rear fork pieces, a five-way pipe and a shock absorbing piece, the five-way pipe is connected to the front parts of the two rear fork pieces, the shock absorbing piece is connected to the upper part of the middle parts of the two rear fork pieces, the shock absorbing piece comprises a shock absorbing frame, a shock absorbing block and an elastic connecting piece, the shock absorbing block is abutted to a towing wheel frame of the towing wheel piece to generate a shock absorbing effect, the rear ends of the two rear fork pieces are connected with rear wheels, the rear fork piece can be folded downwards and forwards, and after the rear fork piece is folded, the rear end of the rear fork piece on the right side of the rear fork piece can be attracted and absorbed by; the front wheel is arranged on the front fork, the telescopic double-rotation type handlebar is connected with the front fork and the front wheel and is folded towards the rear lower part of the middle beam, the folded front wheel can be buckled by the front wheel, and the telescopic double-rotation type handlebar can be folded in a telescopic way; the driving mechanism comprises a middle shaft, two cranks, a chain wheel, two pedals, a flywheel and a chain, the middle shaft is rotatably connected in the five-way pipe, the two cranks are arranged at the two ends of the middle shaft, the chain wheel is fixedly connected to the cranks on the right side of the two cranks, the flywheel is connected to the rear wheel, and the chain is wound on the chain wheel and the flywheel.

The invention has the beneficial effects that: the invention adopts a plurality of technical means, so that the bicycle body is not welded by electric welding, and represents a new trend of the manufacturing process of the bicycle; through the ingenious design, the magnetic folding positioning portable vertical bicycle achieves the effects of high folding speed and small volume after folding; the invention adopts the latest form of the telescopic double-rotation type handlebar, so that the folding of the handlebar is simplest and most effective; the folding bicycle adopts the front piece, the middle beam and the position which is deviated to the left, so that the folded rear wheels can be positioned on the right side surfaces of the front piece and the middle beam, and the rear fork piece can be attracted and positioned by the lower magnet of the middle beam; the invention adopts the front wheel buckle positioning mode, so that the folded handlebar, the front fork and the front wheel are in a folded state; the front connecting piece is locked and fast disassembled by adopting the front connecting piece, so that the front connecting piece and the front connecting piece can be locked and fixed; the invention adopts the mode that the shock-absorbing piece is matched with the tug frame, so that the magnetic folding positioning portable vertical bicycle has the shock-absorbing effect.

Description of the drawings:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is an expanded view of the telescopic dual rotating handlebar of the present invention;

FIG. 3 is a drawing of the telescopic dual rotating handlebar of the present invention;

FIG. 4 is a construction view of the front piece of the present invention;

FIG. 5 is a construction view of the front attachment of the present invention;

FIG. 6 is a construction view of a folding link of the present invention;

FIG. 7 is a structural view of the truck frame of the present invention;

FIG. 8 is a block diagram of the rear fork of the present invention;

FIG. 9 is a schematic view of the folding process of the present invention;

FIG. 10 is a folded view of the present invention;

in the figure: 1-telescopic double-rotation type handlebar, 21-front fork, 22-front piece, 3-middle beam, 4-folding connecting piece, 5-towing wheel piece, 6-rear fork piece, 7-front wheel, 8-rear wheel, 9-driving mechanism; wherein flexible two rotation formula handlebar 1 still includes: 11-left handle, 12-right handle, 13-upper locking piece, 14-lower locking piece; upper lock 13 further includes: 131-handle base, 132-upper lock link; the center sill 3 further includes: 31-beam tube, 32-front connecting piece, 33-front connecting piece locking quick release, 34-lower magnetic attraction, 35-middle beam locking hook piece; the rear fork 6 further comprises: 61-back fork piece, 62-five-way pipe, 63-shock absorbing piece.

The specific implementation mode is as follows:

referring to fig. 1, 2 and 8, the magnetic foldable positioning portable vertical bicycle comprises a telescopic dual-rotation type handlebar 1, a front fork 21, a front piece 22, a center sill 3, a folding link 4, a towing wheel piece 5, a rear fork piece 6, a front wheel 7, a rear wheel 8 and a driving mechanism 9;

the telescopic double-rotation type handlebar 1 comprises a left handle 11, a right handle 12, an upper locking piece 13 and a lower locking piece 14, wherein the left handle 11 and the right handle 12 are both composed of a vertical handle and a horizontal handle pipe, the vertical handle is formed by connecting a vertical head and a vertical handle, the vertical head is an aluminum die casting piece, the vertical head is provided with an omega-shaped connector, the middle lower part of the vertical head is cylindrical, the top surface of the middle lower part of the vertical head is a concave inclined surface, a through hole is arranged on the front side of the vertical direction of a slit below the omega-shaped connector of the vertical head, a threaded hole is arranged on the rear side of the vertical direction of the slit below the omega-shaped connector of the vertical head, the threaded hole below the omega-shaped connector of the vertical head is longitudinally corresponding to the through hole below the omega-shaped connector of the vertical head, the cylindrical outer diameter of the concave inclined surface of the vertical head is larger than the outer diameter of the vertical handle, a cylinder is integrally connected with the cylindrical lower part of the concave inclined surface of the vertical head, the lower end of the vertical pipe is also provided with a bottom ring which is a metal ring in close fit with the vertical pipe.

The right part of the handle horizontal pipe of the left handle 11 is inserted into the connecting port with the omega shape of the handle vertical head of the left handle 11, a bolt is inserted into a through hole below the connecting port with the omega shape of the handle vertical head of the left handle 11, then the handle horizontal pipe is screwed into the threaded hole below the connecting port with the omega shape of the handle vertical head of the left handle 1 and screwed tightly, the connecting port with the omega shape of the handle vertical head of the left handle 11 is locked with the handle horizontal pipe of the left handle 11, the right end of the handle horizontal pipe of the left handle 11 is tightly sleeved with a locking ring, the left part of the handle horizontal pipe of the right handle 12 is inserted into the connecting port with the omega shape of the handle vertical head of the right handle 12, the bolt is inserted into the through hole below the connecting port with the omega shape of the handle vertical head of the right handle 12, then the threaded hole below the connecting port with the omega shape of the connecting port with the handle vertical head of the right handle 12 and screwed tightly, the connecting port with the omega shape of the handle, and a locking ring is tightly matched and sleeved at the left end of the transverse handle pipe of the right handle 12.

The upper locking member 13 comprises a handle base 131, two nylon bushings, an upper locking member 132, two locking rings and two positioning rings, wherein the handle base 131 is an aluminum die-casting or aluminum extrusion-type slicing workpiece, the left and right ends of the handle base 131 are respectively provided with an up-down slotted round hole, the slots of the left and right slotted round holes of the handle base 131 are opposite and corresponding, the slot of the slotted round hole at the left end of the handle base 131 is vertically provided with a longitudinal pair of through holes, the slot of the slotted round hole at the right end of the handle base 131 is vertically provided with a longitudinal pair of through holes, the longitudinal pair of through holes on the slot of the slotted round hole at the left end of the handle base 131 and the longitudinal pair of through holes on the slot of the slotted round hole at the right end of the handle base 131 are respectively provided with a pair of bolt nuts, the middle part of the handle base 131 is provided with a plurality of longitudinal holes, a nylon lining ring is respectively embedded in the slotted round hole at the left end of the handle base 131 and the slotted round hole at the right end of the handle base 131, the nylon lining rings are in a round tube shape, the outer diameters of the nylon lining rings correspond to the slotted round hole at the left end of the handle base 131 and the slotted round hole at the right end of the handle base 131, the inner diameters of the nylon lining rings correspond to the outer diameter of the left handle 1 and the outer diameter of the right handle 12 in a rotating mode, and the height of each nylon lining ring corresponds to the thickness of the handle base 31.

The upper connecting piece 132 comprises a U-shaped clamp and an upper quick-release piece, the U-shaped clamp comprises a J-shaped seat and a locking bolt, the J-shaped seat is an aluminum extruded cutting workpiece, the J-shaped seat is in a forward laid J shape, a transverse arc concave part is arranged at the front upper part of the J-shaped seat, a vertical through hole is arranged in the middle of the arc concave part of the J-shaped seat and is vertical to the arc concave part of the J-shaped seat, a forward convex rib is arranged in the middle of the J-shaped seat, a rotating shaft hole is transversely arranged on the forward convex rib of the J-shaped seat, a plurality of longitudinal holes are arranged below the J-shaped seat, the longitudinal holes below the J-shaped seat correspond to the longitudinal holes in the middle of the handle base 31, the longitudinal holes below the J-shaped seat are fixedly connected with the longitudinal holes in the middle of the handle base 31 through a plurality of bolt nuts, the locking bolt is composed of an aluminum piece and two connecting bolts, the bolt is an aluminum extruded cutting workpiece, the middle part of lock tongue shape aluminium alloy has bellied obtuse angle that makes progress, there is a vertical perforation spring bolt shape aluminium alloy's middle part is located bellied obtuse rear, spring bolt shape aluminium alloy's front end and rear end respectively have a horizontal riveting hole, the spring bolt connection piece is the metal punching sheet, respectively there is a round hole spring bolt connection piece's preceding well back, put two spring bolt connection pieces in spring bolt shape aluminium alloy's both sides, two rivets are fixed the riveting with the preceding round hole and the well round hole of two spring bolt connection pieces and the horizontal riveting hole of spring bolt shape aluminium alloy front end and the horizontal riveting hole of rear end, thereby make the lock tongue, make the back round hole of two spring bolt connection pieces and the horizontal pivot hole of J shape seat rotate with a pair of lock bolt and be connected, thereby make U-shaped folder.

The quick-release handle is rotationally connected with the ring head bolt through a rivet, the ring head bolt penetrates into the arc-shaped lining, the vertical through hole of the J-shaped seat, the locking piece spring and the vertical through hole of the bolt-tongue-shaped aluminum piece from top to bottom, then the locking nut is screwed with the lower end of the ring head bolt, the quick-release handle is turned upwards towards a rear lower plate, an obtuse angle formed by upward protrusions of the locking tongue of the U-shaped clamp can be enabled to be locked with the front side of a lower convex angle of the locking ring at the right end of the transverse pipe of the left handle 11, and the front side of a lower convex angle of the locking ring at the left end of the transverse pipe of the right handle 12, otherwise, the quick-release handle is turned upwards towards the front upper plate, the locking tongue of the U-shaped clamp can be enabled to be downward protruded to be unlocked with the locking ring at the lower convex angle of the right end of the transverse pipe of the left handle 11, and the locking ring is locked and connected with the lower convex angle of the locking ring at the left end of the handle transverse pipe of the right handle 12, the locking ring is an aluminum extruded section, the locking ring is a round part, a round hole which is matched and corresponds to the handle transverse pipe is arranged in the locking ring, the upper part and the lower part of the front part of the locking ring are respectively provided with an upper convex angle and a lower convex angle, the upper convex angle and the lower convex angle of the locking ring are obtuse angles, the upper convex angle and the lower convex angle of the locking ring and the periphery of the middle rear part of the locking ring form a U shape which is laid forwards, and the front side surface of the lower convex angle of the locking ring corresponds to the rear side surface of the upward convex obtuse angle of the locking tongue after locking.

The handle stem of the left handle 11 and the handle stem of the right handle 12 are respectively inserted into a nylon lining ring at the left end of the handle base 131 and a nylon lining ring at the right end of the handle base 131, the positioning ring is composed of a slotted ring and a pair of bolt nuts, the slotted ring is formed by cutting and processing an aluminum extruded section, a slot is formed in the side surface of the slotted ring, two protruding parts are arranged at two sides of the slot of the slotted ring, a pair of mutually opposite through holes vertical to the slot are formed in the two protruding parts of the slotted ring, a pair of bolt nuts are arranged in the mutually opposite through holes of the slotted ring, the two positioning rings are respectively sleeved on the handle stem of the left handle 11 and the handle stem of the right handle 12, the bolt nuts of the positioning rings are screwed, the two positioning rings are fixed on the handle stem of the left handle 11 and the handle stem of the right handle 12, and the two positioning rings are respectively located at the left end of the circular hole of the handle base 131 and the slotted hole of the handle base 131 and the positioning ring of the right handle base 131 And under the slotted round hole at the right end, a bolt nut in a longitudinal mutual through hole at the left end of the handle base 131 and a bolt nut in a longitudinal mutual through hole at the right end are screwed, and the slotted round hole at the left end and the slotted round hole at the right end of the handle base 131 are clamped to the handle vertical pipe of the left handle 11 and the handle vertical pipe of the right handle 12 in a rotatable but non-loose fit manner.

The lower lock 14 is composed of a lower clamp, a lower quick release and a front axle tube, the lower clamp is an extruded aluminum cut-off workpiece, and can also be an aluminum forging or aluminum die casting, the left front end and the right front end of the lower clamp are respectively provided with a vertical slotted round hole, the slot of the slotted round hole at the left front end of the lower clamp faces forward, the slot of the slotted round hole at the right front end of the lower clamp faces forward, the left side of the slotted round hole at the left front end of the lower clamp is provided with a forward left convex sheet, the left side of the left convex sheet of the lower clamp is arc concave, the right side of the slotted round hole at the right front end of the lower clamp is provided with a forward right convex sheet, the middle of the front part of the lower clamp is provided with a forward convex sheet, a mutual transverse through hole is arranged among the left convex sheet of the lower clamp, the convex sheet of the lower clamp and the right convex sheet of the lower clamp, the middle part of the, the rear end of the right side of the lower clamping piece is provided with a vertical round hole, the vertical round hole at the rear end of the right side of the lower clamping piece is transversely corresponding to the vertical round hole at the middle part of the left side of the lower clamping piece, the rear end of the left side of the lower clamping piece is provided with a vertical slotted round hole, the slot of the slotted round hole at the rear end of the left side of the lower clamping piece faces towards the rear, two sides of the slot of the lower clamping piece facing towards the rear are respectively provided with a backward connecting edge, the upper part and the lower part of the two backward connecting edges of the lower clamping piece are respectively provided with a pair of mutual transverse through holes, the upper part and the lower part of the two pairs of mutual transverse through holes of the lower clamping piece are respectively provided with a pair of bolt nuts, the front shaft tube penetrates into the slotted round hole at the rear end of the left side of the lower clamping piece and is screwed with the bolt nuts in the lower pair of, the axle tube is formed by turning a counter bore on the upper end and the lower end of a tube hole of a round tube respectively, a bearing is embedded in each counter bore on the upper end and the lower end of the axle tube, and a round hole in the middle of the left side of the lower clamping piece and a round hole in the rear end of the right side of the lower clamping piece are in close fit correspondence with the two front fork rods of the front fork 2.

The quick release device comprises a lower clamping piece, a left lug, a convex block and a right lug, wherein a transverse through hole is formed between the left lug and the convex block and is used for mounting the lower quick release part, the lower quick release part comprises a quick release handle, a ring head bolt, an arc-shaped gasket, two quick release springs, two nuts and a magnetic suction part, the magnetic suction part consists of a bowl-shaped punching part and a strong magnet, the inner side surface of the bowl-shaped punching part is lined with a plastic ring, the strong magnet is in a ring shape and is placed in the plastic ring in the bowl-shaped punching part, a flat base bolt penetrates through the strong magnet and the bowl-shaped punching part and is screwed on the forward lug of the lower clamping piece, the quick release handle is a part with two parallel heads which is integrally connected with one end of a trigger handle, the quick release handle is rotationally connected with the ring head bolt through a rivet, a flat head knurled bolt is screwed on the middle part of the quick release handle, the flat head of the flat head knurled bolt corresponds to, the arc of the arc gasket corresponds to the arc concave shape on the left side of the left lug of the lower clamping piece, a ring head bolt penetrates through the arc gasket, the hole of the left lug of the lower clamping piece, a quick-release spring, the hole of the lug of the lower clamping piece, the hole of the other quick-release spring and the hole of the right lug of the lower clamping piece, two nuts are oppositely screwed and positioned, a quick-release handle is pulled to tighten the slotted hole on the front part of the left side of the lower clamping piece and the slotted hole on the front part of the right side of the lower clamping piece, then the lower clamping piece is tightened to the handle pipe of the left handle 11 positioned in the slotted hole on the left end of the lower clamping piece and the handle pipe of the right handle 12 positioned in the slotted hole on the right end of the lower clamping piece, and the locked flat head bolt on the quick-release handle and the magnetic attraction piece on the lug of the lower clamping.

The handle vertical pipe of the left handle 11 and the handle vertical pipe of the right handle 12 respectively penetrate into the slotted round hole at the left front end of the lower clamping piece and the slotted round hole at the right front end of the lower clamping piece, and two bottom rings are respectively tightly sleeved at the bottom end of the handle vertical pipe of the left handle 11 and the bottom end of the handle vertical pipe of the right handle 12 in a matching manner and are sleeved at the bottom ring at the bottom end of the handle vertical pipe of the left handle 11 and the bottom ring at the bottom end of the handle vertical pipe of the right handle 12 to serve as limiting positions for upward twitching when the handle vertical pipe of the left handle 11 and the handle vertical pipe of the right handle 12 are unfolded.

The front fork 21 is composed of a left front fork rod and a right front fork rod, the left front fork rod and the right front fork rod are all made of aluminum round tubes, the lower end of the left front fork rod and the lower end of the right front fork rod are both provided with flattening parts, ∩ -shaped openings are formed in the flattening parts of the lower end of the left front fork rod and the lower end of the right front fork rod, the upper end of the left front fork rod is tightly matched and sleeved with a vertical round hole in the middle of a lower clamping piece and reinforced by a pin, and the upper end of the right front fork rod is tightly matched and sleeved with a vertical round hole in the rear end of the right side and reinforced by a pin.

The front piece 22 is an extruded aluminum section, and may be an aluminum forged piece or an aluminum die-cast piece, the front end of the front piece 22 is in a groove shape, the upper and lower sides of the groove shape of the front piece 22 are provided with a pair of through holes, the front ends of the upper and lower sides of the groove shape of the front piece 22 are in a round angle shape, the rear upper end of the front piece 22 is provided with an upward extending part, the upward extending part of the rear upper end of the front piece 22 is provided with a longitudinal hole, the front and rear parts of the longitudinal hole of the rear upper end of the front piece 22 are screwed with a locking bolt and two nuts of the locking hook piece, the rear lower corner of the front piece 22 is provided with a transverse hole, and the pair of through holes of the upper and lower sides of the groove shape of the front piece 22 are connected with two bearings in the front axle tube through the locking bolt.

The middle beam 3 comprises a beam pipe 31, a front connecting piece 32, a front connecting piece locking quick release 33, a lower magnetic attraction 34, a middle beam locking hook piece 35 and a front wheel buckle, wherein the beam pipe 31 is made of a rectangular pipe, the front and the back of the upper side surface of the front end part of the beam pipe 31 are respectively provided with a vertical threaded hole, the lower side surface of the front end part of the beam pipe 31 is provided with a vertical threaded hole, the front connecting piece 32 is an aluminum die casting piece, the front part of the front connecting piece 32 is a groove-shaped part with a forward opening, the upper end part and the lower end part of the left side surface and the right side surface of the groove-shaped part of the front connecting piece 32 are respectively provided with a pair of mutually transverse pair through holes, the left side of the rear side surface of the upper end part of the groove-shaped part of the front connecting piece 32 is provided with a vertical slotted notch, the inner width of the groove-shaped part of the front connecting piece 32 corresponds to the width of the backward extending part of the front piece 22, the rear part of the front connecting piece 32 is a rectangular pipe hole, and the size of the pipe hole, the pipe-shaped portion of the front connector 32 is press-fitted into the pipe hole at the front end of the beam pipe 31 and riveted with a rivet, the front connecting piece locking quick release 33 is composed of a quick release handle, a ring head bolt, a quick release liner and a front connecting piece barrel, the quick release handle is rotationally connected with the ring head bolt through a rivet, the front connecting piece barrel is formed by integrally connecting one end of a round rod with a semicircular bolt head and opening an axial threaded hole at the end point of the other end of the round rod, the front connecting piece barrel penetrates into a pair of mutually transverse through holes at the upper end part of the groove-shaped part of the front connecting piece 32 from right to left, the ring head bolt penetrates into the quick-release liner from left to right and is screwed into a threaded hole of the front connecting piece screw barrel, and rotating the quick release handle of the front connecting piece locking quick release 33 to the lower plate to clamp the upper end of the groove-shaped part of the front connecting piece 32 to the front lower part of the upward extending part of the front piece 22.

Lower magnetism inhale 34 and dash the piece by the bowl type and constitute with the strong magnet, the bowl type is dashed the medial surface of piece and is lined with the plastic ring, and the strong magnet is the circle shape, and the strong magnet is put into the bowl type and is dashed the plastic ring in the piece, forms lower magnetism inhale 34, penetrate with a flat base bolt lower magnetism inhale 34 strong magnet and bowl type and dash in the piece, and connect with the screw in the vertical screw hole of beam tube 31 front end portion downside, with in the vertical screw hole of the right angle bend backward under preceding even piece 32, and screw up, will lower magnetism inhale 34 the downside fixed connection of beam tube 31 front end portion, penetrate with a bolt the tank bottom of well roof beam latch member 35 slot type seat, and screw into in the preceding vertical screw hole of the side on the beam tube 31 front end portion, and screw up, will well roof beam latch member 35 slot type seat with the upside fixed connection of beam tube 31 front end portion.

The locking hook member 35 is composed of a locking hook, a groove-shaped seat, a locking hook spring, a positioning bolt, a locking bolt and two nuts, wherein the left side and the right side of the groove-shaped seat are provided with upward ear edges, the two ear edges of the groove-shaped seat are provided with a pair of mutually transverse through holes, the front end of the locking hook is provided with a downward configuration part, the front middle part is provided with a transverse ring-shaped part and a vertical hole at the rear middle part, the transverse ring-shaped part of the locking hook is rotatably connected with the two ear edges of the groove-shaped seat through the locking bolt, the locking hook spring is arranged between the locking hook vertical hole and the upper side surface of the front end part of the beam tube 31, the positioning bolt is penetrated into the vertical hole of the locking hook and the locking hook spring from top to bottom, then screwed into the rear vertical threaded hole on the upper side surface of the front end part of the beam tube 31 and the rear vertical threaded hole which is bent at a right angle backwards on the upper side of the front connecting member 32, then the, and then, screwing a nut at one end of a locking bolt extending out of a longitudinal hole at the upper rear end of the front piece 22, wherein the locking bolt is a flat base bolt, a pair of mutually opposite penetrating holes at the lower ends of the left and right sides of the front connecting piece 32 bent forwards at a right angle are rotatably connected with a transverse hole at the lower rear corner of the front piece 22 through opposite locking bolts, the folding connecting piece 4 is sleeved at the middle rear part of the beam pipe 31, the rear end of the beam pipe 31 is tightly sleeved with the towing wheel piece 5 in a matching way, and after the front piece 22 and the front connecting piece 32 are closed, a locking hook positioned on the beam pipe 31 is mutually locked and connected with the locking bolt positioned on the front piece 22.

The front wheel buckle be made by nylon, the front wheel buckle be the h shape, the upper portion that the front wheel was buckled through riveting or twist connect in the right side at beam tube 31 rear portion, and be located between folding even 4 and the tow boat frame, the inboard of two lower extremes of front wheel buckle has the arch of obtuse angle shape, two lower extremes of front wheel buckle have elasticity to utilize the inboard arch of obtuse angle shape of two lower extremes to buckle the front wheel after folding.

The folding connecting piece 4 is an aluminum die casting or aluminum forging piece, the left part of the folding connecting piece 4 is provided with a longitudinal rectangular slotted hole, a longitudinal slot is arranged below the rectangular slotted hole of the folding connecting piece 4, two pairs of mutual transverse pair through holes are vertically arranged on the longitudinal slot of the folding connecting piece 4, two bolts penetrate into the two pairs of mutual transverse pair through holes of the folding connecting piece 4 and are screwed with two nuts, the longitudinal slot of the folding connecting piece 4 is tightened, the folding connecting piece 4 is fixed at the middle rear part of the beam pipe 31, the right part of the folding connecting piece 4 is provided with a slot part with a downward opening, two sides of the slot part of the folding connecting piece 4 are provided with a pair of mutual transverse pair through holes, and the mutual transverse pair through holes at two sides of the slot part of the folding connecting piece 4 are rotatably connected with the rear fork 6 through two pairs of bolt nuts.

The towing piece 5 consists of a towing wheel frame, two-head bolts, three liner tubes and two PU wheels, the towing wheel frame is formed by cutting and processing an aluminum extrusion, the left side and the right side of the towing wheel frame are respectively provided with a longitudinal rectangular hole, a pair of ear-shaped vertical edges are arranged above the right rectangular hole of the towing wheel frame, a pair of transverse through holes are arranged on the pair of ear-shaped vertical edges of the towing wheel frame, a vertical elastic connection hole is arranged below the right rectangular hole of the towing wheel frame, a liner tube is corresponding to the pair of transverse through holes between the pair of ear-shaped vertical edges of the towing wheel frame, the two bolts penetrate into the pair of transverse through holes of the towing wheel frame and the liner tube, and then the two liner tubes are respectively sleeved at two ends of the two bolts, two ends of the two bolts are exposed, the two PU wheels are respectively sleeved at two ends of the two bolts and are exposed, and the two PU wheels are screwed at two ends of the two bolts by using locknuts, so that the dragging piece 5 is formed.

The rear fork piece 6 comprises two rear fork pieces 61, a five-way pipe 62 and a shock absorbing piece 63, wherein the two rear fork pieces 61 are formed by punching aluminum sheets, the front end parts of the two rear fork pieces 61 are respectively provided with a connecting hole, the connecting hole at the front end parts of the two rear fork pieces 61 is connected with two sides of the lower groove-shaped part of the folding connecting piece 41, the front parts of the two rear fork pieces 61 are respectively provided with a round hole which is tightly matched and corresponding to the diameter of the five-way pipe 62, the middle parts of the two rear fork pieces 61 are respectively provided with two holes, the rear ends of the two rear fork pieces 61 are respectively provided with a backward U-shaped groove, the lower part of the rear end of the right rear fork piece in the two rear fork pieces 61 is also connected with an iron punching piece, when the two rear fork pieces 61 are folded downwards and forwards, the iron punching piece is attracted with the lower part 34, the five-way pipe 62 is connected in the round holes of the two rear fork pieces, the shock absorbing piece 63 is connected above the middle parts of the two rear fork pieces 61, and the shock absorbing, The shock absorbing frame is formed by punching an aluminum sheet into right-angled folded edges with the left side and the right side facing downwards, the two right-angled folded edges of the shock absorbing frame are respectively riveted with the middle parts of the two rear fork pieces 61, the shock absorbing frame is provided with a front vertical hole, a middle vertical hole and a rear vertical hole, the shock absorbing block is made of polyurethane and is in a rectangular block shape, the front part and the rear part of the shock absorbing block are respectively provided with a vertical connecting hole, the upper part of the connecting hole of the shock absorbing block is a through hole with a counter bore penetrating through the lower part, a vertical hole is arranged between the two vertical connecting holes of the shock absorbing block, the vertical hole of the shock absorbing block is a through hole with a counter bore penetrating through the upper part, the elastic connecting piece is composed of a flat base bolt, two nuts and a screw steel ball, the flat base bolt of the elastic connecting piece penetrates into the middle vertical hole of the shock absorbing frame from bottom to top, the two nuts are screwed with the flat base bolt, so, and then screw steel balls are screwed on the flat base bolts, two connecting holes of the shock absorption block are connected with the front vertical hole and the rear vertical hole of the shock absorption frame through locking bolts, and the screw steel balls of the elastic connecting piece on the shock absorption piece 63 and the elastic connecting holes of the dragging piece 5 are staggered front and back.

The front wheel 7 is an 8-inch wheel, two ends of a wheel shaft of the front wheel 7 are arranged in ∩ -shaped openings of the two front fork rods through matching of nuts, the rear wheel 8 is a 10-inch wheel, and two ends of a wheel shaft of the rear wheel 8 are fixedly connected in the U-shaped openings of the two rear fork blades 61 through matching of nuts.

The driving mechanism 9 comprises a middle shaft, two cranks, a chain wheel, two pedals, a flywheel and a chain, wherein the middle shaft is connected in the five-way pipe through a middle shaft accessory, the two cranks are arranged at two ends of the middle shaft, the chain wheel is fixedly connected to the right cranks of the two cranks, the two pedals are respectively connected to the two cranks, the flywheel is connected to the right side of the rear wheel 82, and the chain is wound on the chain wheel and the flywheel.

Claims

1. The utility model provides a portable vertical bicycle of location is folded to magnetism, includes flexible dual-rotary formula handlebar, front fork, front part, well roof beam, folding even piece, towing wheel spare, back fork spare, front wheel, rear wheel and actuating mechanism, characterized by: the telescopic double-rotation type handlebar comprises a left handle, a right handle, an upper locking piece and a lower locking piece, wherein the left handle and the right handle are both composed of a vertical handlebar tube and a horizontal handlebar tube, the vertical handlebar tube is formed by connecting a vertical handlebar head and a vertical handlebar tube, the vertical handlebar head is connected to the top end of the vertical handlebar tube, an omega-shaped connector is arranged on the vertical handlebar head, the vertical handlebar head is connected with the horizontal handlebar tube through the omega-shaped connector, the right end of the horizontal handlebar tube of the left handle and the left end of the horizontal handlebar tube of the right handle are respectively sleeved with a locking ring, and the vertical handlebar tube further comprises a bottom ring; the upper lock piece comprises a handle base, two nylon lining rings, an upper lock connecting piece, two lock connecting rings and two positioning rings, wherein the left end and the right end of the handle base are respectively provided with an upward and downward slotted round hole, a slot of the slotted round hole at the left end of the handle base is opposite to a slot of the slotted round hole at the right end, a longitudinal mutual opposite penetrating hole is formed in the vertical direction of the slot of the slotted round hole at the left end of the handle base, a longitudinal mutual opposite penetrating hole is formed in the vertical direction of the slot of the slotted round hole at the right end of the handle base, the longitudinal mutual opposite penetrating hole on the slot of the slotted round hole at the left end of the handle base and the longitudinal mutual opposite penetrating hole on the slot of the slotted round hole at the right end of the handle base are respectively provided with a pair of bolt and nuts, a nylon is respectively embedded in the slotted round hole at the left end and the slotted round hole at the right end of the handle base, the lining ring locking piece comprises a U-shaped clamp, the U-shaped clamp is formed by connecting a J-shaped seat and a locking tongue, the J-shaped seat is connected with the middle part of the handle base through a bolt, an upper quick-release part is connected with the J-shaped seat and the locking tongue, the U-shaped clamp formed by the J-shaped seat and the locking tongue can be tightened by the upper quick-release part, a locking ring at the right end of the horizontal tube of the left handle and a locking ring at the left end of the horizontal tube of the right handle are locked by the U-shaped clamp after being unfolded, a vertical tube of the left handle and a vertical tube of the right handle are connected in nylon lining rings at the left end and the right end of the handle base, a pair of bolts and nuts in a longitudinal pair of through holes on a slit of the slit round hole at the left end of the handle base are screwed, the handle base is provided with a slotted round hole at the right end, and the slotted round hole at the left end and the slotted round hole at the right end are tightly clamped to the handle vertical pipe of the left handle and the handle vertical pipe of the right handle, which can rotate but are not loosened to be proper; the lower locking piece consists of a lower clamping piece and a lower quick release part, wherein the left front end and the right front end of the lower clamping piece are respectively provided with an up-down slotted round hole, the slot of the slotted round hole at the left front end of the lower clamping piece faces the front, the slot of the slotted round hole at the right front end of the lower clamping piece faces the front, the left side of the slot of the slotted round hole at the left front end of the lower clamping piece is provided with a forward left lug, the right side of the slot of the slotted round hole at the right front end of the lower clamping piece is provided with a forward right lug, the middle part of the lower clamping piece is provided with a forward convex block, a mutual transverse through hole is arranged among the left lug, the convex block and the right lug of the lower clamping piece, the middle part of the left side of the lower clamping piece is provided with a vertical round hole, the slotted round hole at the left rear end of the lower clamping piece is fixedly connected with the front shaft tube, the rear end of the right side of the, the left handle and the right handle penetrate through vertical round holes at the left front end and the right front end of the lower clamp, two bottom rings are fixedly sleeved at the bottom end of a handle vertical pipe of the left handle and the bottom end of a handle vertical pipe of the right handle respectively, the lower quick-release device is arranged in a transverse through hole formed by a left lug, a convex block and a right lug of the lower clamp, the lower quick-release device can tighten a slotted round hole at the left end of the lower clamp and a slotted round hole at the right end of the lower clamp, the left handle and the right handle in the lower clamp are fixed, and a front shaft tube is further arranged in a vertical round hole at the rear end of the lower clamp; the front end of the front part is rotationally connected with the front axle tube, the front end of the middle beam is rotationally connected with the front part, the middle beam comprises a beam tube, a front connecting part, a locking and quick-release front connecting part and a lower magnet, the middle beam locking hook piece and the front wheel buckle are respectively arranged at the front end part of the beam tube, the front connecting piece is locked and quickly disassembled and is arranged at the upper end part of the front connecting piece, the middle beam locking hook piece can be locked and connected with the rear upper end of the front piece, the front connecting piece is locked and quickly disassembled and can lock the front connecting piece and the front piece, the middle rear part of the beam tube is sleeved with the folding connecting piece, the rear end of the beam tube is sleeved with the towing wheel piece, the front wheel buckle is fixedly arranged on the left side of the rear end part of the beam tube, the left part of the folding connecting piece is provided with a longitudinal rectangular slotted hole, the right part of the folding connecting piece is provided with a part with a groove-shaped part with a downward opening, the lower end parts of two sides of the groove-shaped part of the folding connecting piece are provided with a pair of transverse through holes, and the pair of transverse through holes of two sides of the groove-shaped part; the rear fork piece is composed of two rear fork pieces, a five-way pipe and a shock absorbing piece, the five-way pipe is connected to the front parts of the two rear fork pieces, the shock absorbing piece is connected to the upper part of the middle parts of the two rear fork pieces, the shock absorbing piece comprises a shock absorbing frame, a shock absorbing block and an elastic connecting piece, the shock absorbing block is abutted to a towing wheel frame of the towing wheel piece to generate a shock absorbing effect, the rear ends of the two rear fork pieces are connected with rear wheels, the rear fork piece can be folded downwards and forwards, and after the rear fork piece is folded, the rear end of the rear fork piece on the right side of the rear fork piece can be attracted and absorbed by; the front wheel is arranged on the front fork, the telescopic double-rotation type handlebar is connected with the front fork and the front wheel and is folded towards the rear lower part of the middle beam, the folded front wheel can be buckled by the front wheel, and the telescopic double-rotation type handlebar can be folded in a telescopic way; the driving mechanism comprises a middle shaft, two cranks, a chain wheel, two pedals, a flywheel and a chain, the middle shaft is rotatably connected in the five-way pipe, the two cranks are arranged at the two ends of the middle shaft, the chain wheel is fixedly connected to the cranks on the right side of the two cranks, the flywheel is connected to the rear wheel, and the chain is wound on the chain wheel and the flywheel.

2. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the J-shaped seat is in a forward laid J shape, the locking connection tongue consists of a lock tongue-shaped aluminum piece and two lock tongue connection pieces, the middle part of the lock tongue-shaped aluminum piece is provided with an obtuse angle which protrudes upwards, the middle part of the lock tongue-shaped aluminum piece is provided with a vertical perforation which is positioned behind the protruding obtuse angle, the two lock tongue connection pieces are placed on two sides of the lock tongue-shaped aluminum piece, two rivets are used for fixedly riveting the front round hole and the middle round hole of the two lock tongue connection pieces, the transverse riveting hole at the front end of the lock tongue-shaped aluminum piece and the transverse riveting hole at the rear end of, thereby manufacturing a locking bolt, rotationally connecting the rear round holes of the two bolt connecting sheets with the transverse rotating shaft hole of the J-shaped seat by a pair of locking bolts, the quick-release handle is rotationally connected with the ring head bolt through riveting, the ring head bolt penetrates into the arc-shaped gasket, the vertical through hole of the J-shaped seat, the lock connecting piece spring and the vertical through hole of the lock connecting tongue from top to bottom, and then the lock nut is screwed with the lower end of the ring head bolt.

3. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the lock connecting ring is a round part, the upper part and the lower part of the front part of the lock connecting ring are respectively provided with an upper convex angle and a lower convex angle, the upper convex angle and the lower convex angle of the lock connecting ring and the periphery of the middle rear part of the lock connecting ring form a U shape which is laid forwards, and the front side surface of the lower convex angle of the lock connecting ring corresponds to the rear side surface of an upward convex obtuse angle of the lock connecting tongue after locking.

4. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the lower quick release comprises a quick release handle, a ring head bolt, an arc-shaped gasket, two quick release springs, two nuts and a magnetic suction piece, wherein a flat-head knurled bolt is screwed in the middle of the quick release handle, and the locked flat-head knurled bolt on the quick release handle and the magnetic suction piece on the convex block of the lower clamping piece are mutually sucked.

5. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: a longitudinal hole is arranged on the upward extending part at the rear upper end of the front piece, a locking bolt and two nuts of the locking hook piece are screwed in front of and behind the longitudinal hole at the rear upper end of the front piece, the rear lower corner of the front piece is provided with a transverse hole, the front part of the front connecting piece is a groove-shaped part with a forward opening, the left side of the rear side surface of the upper end part of the groove-shaped part of the front connecting piece is provided with a vertical slotted notch, the rear part of the front connecting piece is a rectangular tube-shaped part, the pipe-shaped part of the front connecting piece is pressed into the pipe hole at the front end of the beam pipe and riveted and reinforced by a rivet, the screw cylinder of the front connecting piece penetrates into a pair of mutually transverse through holes at the upper end part of the groove-shaped part of the front connecting piece from right to left, the ring head bolt penetrates into the quick-release liner from left to right and is screwed into a threaded hole of the front connecting piece screw barrel, and rotating the quick-release handle of the front connecting piece locking quick-release mechanism towards the lower plate to clamp the upper end of the groove-shaped part of the front connecting piece to the front lower part of the upward extending part of the front piece.

6. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the locking hook piece is composed of a locking hook, a groove-shaped seat, a locking hook spring, a positioning bolt, a locking bolt and two nuts, wherein the left side and the right side of the groove-shaped seat are provided with upward lug edges, the two lug edges of the groove-shaped seat are provided with a pair of transverse opposite through holes, the front end of the locking hook is provided with a downward configuration part, the front middle part is provided with a transverse ring-shaped part, and the rear middle part is provided with a vertical hole.

7. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the front wheel buckle is h-shaped, the inner sides of the two lower ends of the front wheel buckle are provided with obtuse-angle bulges, the two lower ends of the front wheel buckle are provided with elasticity, and the folded front wheel is buckled by the obtuse-angle bulges on the inner sides of the two lower ends.

8. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: the towing piece is composed of a towing wheel frame, two-head bolts, three liner tubes and two PU wheels, the towing wheel frame is formed by cutting and processing an aluminum extrusion, the left side and the right side of the towing wheel frame are respectively provided with a longitudinal rectangular hole, a pair of ear-shaped vertical edges are arranged above the right rectangular hole of the towing wheel frame, a pair of transverse through holes are arranged on the pair of ear-shaped vertical edges of the towing wheel frame, a vertical elastic connection hole is arranged below the right rectangular hole of the towing wheel frame, a liner tube is corresponding to the pair of transverse through holes between the pair of ear-shaped vertical edges of the towing wheel frame, the two-head bolts penetrate into the pair of transverse through holes of the towing wheel frame and the liner tube, and then the two liner tubes are respectively sleeved at two ends of the two bolts, two ends of the two bolts are exposed, the two PU wheels are respectively sleeved at two ends of the two bolts and are exposed, and the two PU wheels are screwed at two ends of the two bolts by using locknuts, so that the dragging piece is formed.

9. The magnetic folding positioning portable vertical bicycle of claim 1, characterized in that: two the connecting hole of back fork piece front end with the lower cell type portion both sides of folding even piece are connected, two the front portion of back fork piece respectively have with the round hole that the diameter tight fit of five-way pipe corresponds, two the below of the right back fork piece rear end in the back fork piece still is connected with the iron and dashes the piece, the piece of moving away to avoid possible earthquakes connect in two the top at back fork piece middle part, the piece of moving away to avoid possible earthquakes including moving away to avoid possible earthquakes frame, shock absorber block and elastic connecting piece, move away to avoid possible earthquakes the frame and become by an aluminum sheet punching press about both sides decurrent right angle hem, two right angle hems of moving away to avoid possible earthquakes.

10. The magnetic folding positioning portable vertical bicycle of claim 9, characterized in that: the shock-absorbing frame is provided with a front vertical hole, a middle vertical hole and a rear vertical hole, the shock-absorbing block is made of polyurethane, the shock-absorbing block is rectangular, a vertical connecting hole is formed in the front of the shock-absorbing block and the rear of the shock-absorbing block, the elastic connecting piece is composed of a flat base bolt, two nuts and screw steel balls, the flat base bolt of the elastic connecting piece penetrates into the middle vertical hole of the shock-absorbing frame from bottom to top, the flat base bolt is screwed with the flat base bolt through the two nuts, the vertical hole of the shock-absorbing block is sleeved on the flat base bolt of the elastic connecting piece, the screw steel balls are screwed on the flat base bolt, the two connecting holes of the shock-absorbing block are connected with the front vertical hole and the rear vertical hole of the shock-absorbing frame through a locking bolt, and.