The back shelf of motor bike band backrest
Technical field
The utility model relates to a kind of motor bike loading frame, particularly a kind of back shelf of motor bike band backrest.
Background technology
Shelf are because of can lade being subjected to vast motor bike customer's welcome behind the motor bike, and therefore many motor bikes manufacturer constantly increases new function for the needs that satisfy market, shelf behind the motor bike that design makes new advances on shelf behind the motor bike.
At present, the backrest that the back shelf of common motor bike band backrest are normally taken back seat personnel on the market is fixed on the luggage carrier, and the back seat personnel of taking can be relied on to some extent, improves traveling comfort and the safety taken.But this backrest can not folding, extremely inconvenient when making the back seat personnel of taking take up and down, and when carrying bigger object, because of the backrest occupy-place hinders the object reach, make motor bike thus behind the more massive object of carrying on the shelf of back, the center of gravity of car load is offset backward, and it is unstable to cause motorcycle front-wheel to climb ground, has a strong impact on the safety traffic of motor bike.The patent No. a kind of technical scheme that has been by name " motor bike rotate backrest after shelf " patent disclosure of 200320115373.0 with shelf behind the backrest, this scheme is provided with the tool box below the shelf of back, the person in charge of back shelf both sides goes up affixed locating piece, the backrest both sides are hinged on the locating piece by connecting pin, affixed axle sleeve on the backrest, the outer section of axle sleeve is with the stage clip regulating sleeve that abroad is threaded, pivot pin overcoat stage clip in the axle sleeve, pivot pin one end passes backrest and fixed block simultaneously, the pivot pin other end passes the stage clip regulating sleeve and is connected with steel wire, steel wire is connected on the end of pipe link, and the other end of pipe link stretches in the tool box, and this end is provided with spanner.When needing folding back, rotating spanner, pipe link pulling steel wire, steel wire pulling pivot pin moves in the stage clip regulating sleeve, thereby backrest is folded on the shelf of back along connecting pin.Backrest on the back shelf of this structure, though the backrest upset is folded on the shelf of back, but because its complex structure, the position that is provided with of operating unit is positioned at the tool box, need to open the tool box with key during the upset backrest, the spanner that could will be arranged in the tool box is pulled, and removes the locking to backrest, backrest is rotated, use extremely inconvenient; And the action of its Lock Part relies on steel wire to affect, and the easy invar silk fracture of its work, tired and influenced causes backrest to overturn; Simultaneously, the backrest of this structure and fixed block are by the connecting pin hinged securement, this just requires very high to the fit dimension between each parts, big slightly as the lateral dimension at backrest articulation place, can produce distortion during assembling, and also can form interference when using, cause using inconvenience, slightly little as the lateral dimension at backrest articulation place, can cause tolerance clearance excessive again, the assembling back produces loosening, sends dither noise during motorcycle driving; And, on the shelf of this back the tool box must be set, the integral structure layout of motor bike is limited to.
Summary of the invention
The purpose of this utility model is the deficiency that exists at prior art, a kind of back shelf of motor bike band backrest are provided, it is by simple structure, just can realize the lockover of backrest on the shelf of back, and it is less demanding to the lateral dimension at backrest articulation place, be easy to processing and assembling, and cooperate compact, easy to use.
The purpose of this utility model is achieved in that horizontal projection is that the luggage carrier of " U " shape is connected with main backstop, and the front portion of luggage carrier is provided with backrest; Inboard, described " U " shape luggage carrier open front both sides is provided with the back support axle sleeve respectively, be provided with elastic positioning pin near one of them back support axle sleeve, described backrest welds a horizontal pivot shaft, the one end welding locating piece of horizontal pivot shaft, locating piece is provided with at least two knock holees, near the axis hole free-running fit of the back support axle sleeve this end of horizontal pivot shaft and the elastic positioning pin, elastic positioning pin inserts one of them knock hole locking position of back on the locating piece, the other end of horizontal pivot shaft and another back support axle sleeve have an intersegmental distance, this end is threaded and one is used to regulate the rotating shaft of length, axis hole free-running fit by this rotating shaft and another back support axle sleeve is installed in rotation on the luggage carrier backrest.
Owing to adopted such scheme, in inboard, " U " shape luggage carrier open front both sides the back support axle sleeve is set respectively, the back support axle sleeve hinge mounted on horizontal pivot shaft of backrest by welding and " U " shape luggage carrier.For reducing assembly difficulty, the length of horizontal pivot shaft is made as than the axially spaced-apart between in opposite directions the two back support axle sleeves on the luggage carrier apart from weak point, one end of horizontal pivot shaft directly with the axis hole free-running fit of a back support axle sleeve, the other end is threaded and one is used to regulate the rotating shaft of length, axis hole free-running fit by this rotating shaft and another back support axle sleeve is installed in rotation on the luggage carrier backrest.Adopt this structure, when making " U " shape luggage carrier, can reduce the fitted position accuracy requirement of " U " shape luggage carrier open front width, during the assembling backrest, can be by being used to regulate the rotating shaft of length and the screw thread fit of horizontal pivot shaft is regulated length, after the rotating shaft that is used to regulate length and back support axle sleeve gap are coupled to the position, use the jam nut latched position, the rotating shaft that guarantees to be used for to regulate length can not withdrawed from from the axis hole of back support axle sleeve.After making the backrest upset, can effectively locate, near a back support axle sleeve of " U " shape luggage carrier, be provided with elastic positioning pin, horizontal pivot shaft at backrest welds locating piece with the end that the back support axle sleeve directly cooperates, locating piece is provided with at least two knock holees, and one of them knock hole locking position of back on the locating piece is inserted by elastic positioning pin in backrest upset back.The support of described elastic positioning pin is welded on the luggage carrier below, guide is welded on the support, spring is located in the guide, intersegmental crack, big footpath for the latch of ladder cylinder is engaged in the guide, the tail end insertion guide of latch passes spring and support is overhanging, draw ring restriction withdrawal on its overhanging tail end card, the head end of latch is pushed in the knock hole of locating piece by the tension force of spring.This simple structure can either guarantee the stability of elastic positioning pin work and the reliability of locking, because elastic positioning pin is arranged on the luggage carrier, its axle center coordinate position can not change, and can lock locating piece exactly when backrest rotates again; And the simplifying the structure of its operation control, only need the aft mounted draw ring of pulling latch, just latch can be withdrawed from unlocking from the knock hole of locating piece, simple to operation.
Simultaneously, because the axis hole of back support axle sleeve of the present utility model is a blind hole, horizontal pivot shaft and back support axle sleeve hinge mounted axially are subjected to displacement restriction, can not produce end float misalignment, make the free-running fit between the axle of hole tight; In conjunction with the elastic positioning pin of said structure and the latch-up structure of locating piece, the upset backrest of shelf is compared behind the upset backrest that makes shelf behind the motor bike of this structure and the existing motor bike, the upset backrest can not send noise because of vibrations when motorcycle driving, has the remarkable noise-reducing effect.
As improvement to the backrest registration device of prior art, the locating piece of this structure adopts secter pat, knock hole on the locating piece is provided with two at least, can also make like this backrest in the scope at 90 ° of angles of maximum rotation according to the residing angle of different knock holees, adjust the orientation angle of backrest, more comfortable when the person of taking is relied on.
The utility model is simple in structure, and the processing of each parts is simple, and tooling cost is low, and assembly difficulty is low, helps enhancing productivity, and reduces production costs.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is the p place partial enlarged drawing of Fig. 1;
Fig. 4 is the scheme drawing of backrest upset of the present utility model.
Among the figure, 1 is main backstop, and 2 is luggage carrier, and 2a is the back support axle sleeve, and 3 is backrest, and 4 for being used to regulate the rotating shaft of length, 5 is nut, and 6 is horizontal pivot shaft, and 7 is locating piece, and 8 is knock hole, and 9 is support, and 10 is guide, 11 is latch, and 11a is the latch head end, and 12 is spring, and 13 is draw ring
The specific embodiment
Referring to Fig. 1 to Fig. 4, the horizontal projection of shelf is that the luggage carrier 2 of " U " shape is captiveed joint with main backstop 1 behind the motor bike of present embodiment, the open front of the luggage carrier 2 of " U " shape is bent downwardly, be welded on two main backstop 1 tops respectively, the rear end K/UP of two main backstops 1, be welded on the bottom of the luggage carrier 2 of " U " shape respectively, make luggage carrier 2 form captiveing joint of diamond structure, improve Joint strenght and rigidity between luggage carrier 2 and the main backstop 1 with main backstop 1.Inboard, described " U " shape luggage carrier 2 open front both sides is provided with back support axle sleeve 2a respectively, and two back support axle sleeve 2a are welded on respectively on the luggage carrier 2, and the axis hole of back support axle sleeve is made as blind hole, and the blind hole of two back support axle sleeve 2a in opposite directions.Be provided with elastic positioning pin near one of them back support axle sleeve, described elastic positioning pin is made up of support 9, guide 10, latch 11, spring 12, draw ring 13, support 9 is welded on luggage carrier 2 belows, guide 10 is welded on the support 9, compression spring 12 is located in the guide 10, the tail end insertion guide 10 of latch 11 passes spring 12 and support 9 is overhanging, draw ring 13 restriction latch retract on the overhanging tail end card of latch 11, the head end of latch 11 is pushed in the knock hole 8 of locating piece 7 by the tension force of compression spring.Described backrest 3 welding one horizontal pivot shaft 6, the one end welding locating piece 7 of horizontal pivot shaft 6, described locating piece 7 is to be the secter pat of center of circle expansion with horizontal pivot shaft 6, locating piece 7 is provided with at least two knock holees 8, and it is that the maximum angle that the top, angle forms is 90 ° with horizontal pivot shaft 6 axle center between two knock holees 8 farthest.The end that horizontal pivot shaft 6 is welded with locating piece 7 is by the cylindrical journal that is provided with and the axis hole free-running fit of the back support axle sleeve 2a the elastic positioning pin near, and the latch head end 11a of elastic positioning pin inserts one of them knock hole 8 locking backrests 3 position on the locating piece.Described latch 11 is the ladder cylinder, and its head end and tail end are respectively the path section, is big footpath section between head end and the tail end, and this intersegmental crack, big footpath is engaged in the guide 10, and spacing to compression spring 12.Described latch head end 11a is made as circular arc chamfering, helps inserting under the tension force effect of compression spring 12 in the knock hole of locating piece.The other end of described horizontal pivot shaft 6 and another back support axle sleeve 2a have an intersegmental distance, and this end of horizontal pivot shaft 6 is threaded and one is used to regulate the rotating shaft 4 of length.This end of described horizontal pivot shaft 6 is provided with axial tapped bore, rotating shaft 4 one ends that are used to regulate length are provided with the tapped bore screw thread fit of thread segment and horizontal pivot shaft 6, and with jam nut 5 latched positions, this is used to regulate the smooth shaft part of rotating shaft 4 other ends of length and the axis hole free-running fit of back support axle sleeve 2a, and backrest 3 is installed in rotation on the luggage carrier 2.
When being assemblied in backrest 3 on the luggage carrier 2, the rotating shaft 4 that at first will be used for regulating length is threaded in the tapped bore of horizontal pivot shaft 6, temporarily makes the horizontal pivot shaft 6 that has connected the rotating shaft 4 that is used to regulate length be shorter in length than the length of two axially spaced-apart distances between the back support axle sleeve 2a.Then horizontal pivot shaft 6 is welded with locating piece 7 an end the axle journal free-running fit in the axis hole of right back support axle sleeve 2a, again horizontal pivot shaft 6 other end bonded assemblys are used to regulate the rotating shaft 4 of length by oppositely turning, the smooth shaft part that is used in the rotating shaft 4 of regulating length partly insert form free-running fit in the axis hole of right back support axle sleeve, turn jam nut 5 then and will be used to regulate rotating shaft 4 lockings of length, make it and to bounce back.Haul the latch 11 that draw ring 13 makes elastic positioning pin again and tighten in the guide 10, rotate backrest 3 latch 11 is inserted under the tension force of spring 12 in the knock hole 8 of locating piece 7, the running condition of backrest 3 is locked.
The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model.If do not break away from spirit and scope of the present utility model, the utility model is made amendment or is equal to replacement, all should be encompassed in the protection domain of the utility model claim.