A kind of rear shock absorber
Technical field
The utility model relates to vapour and to rub accessory technical field, is specially a kind of rear shock absorber.
Background technique
Concussion when vibration damper rebounds after being mainly used to suppress spring shock-absorbing and the impact from road surface.Through uneven road surface, although shock-absorbing spring can filter the vibrations on road surface, spring self also has to-and-fro motion, and vibration damper is just used to suppress this spring to jump.Vibration damper is too soft, and vehicle body will vertical bounce, and vibration damper will bring too large resistance too firmly, hinders spring normally to work.About in the retrofit process of suspension system, hard vibration damper will be arranged in pairs or groups mutually with hard spring, and the hardness of spring is closely bound up with car weight, and therefore heavier car generally adopts harder vibration damper.
Traditional shock absorber is when bearing external force, and the head and the tail two ends of spring, with fixed base and Mobile base, relative bounce-back often occur, and the head and the tail two ends of spring and fixed base and Mobile base produce and slide, and local deformation occurs spring, causes rear shock absorber to be scrapped.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is the rear shock absorber providing a kind of physical life long.
For achieving the above object, the utility model provides following technological scheme: a kind of rear shock absorber, comprise piston assembly, piston assembly comprises piston rod, it is characterized in that: one end of described piston assembly is connected with fixed base, the other end is connected with Mobile base, described fixed base is provided with the first bumping post of cylindrical shape, described Mobile base is provided with the second bumping post of cylindrical shape, described piston assembly outer cover is provided with spring, spring comprises the first spring section and the second spring section, the pitch of the first spring section and the pitch of the second spring section are than being 1.5-2, described first spring section comprises first lap steel wire and the second circle steel wire, described second spring section comprises the 3rd circle steel wire and the 4th circle steel wire.
Further, described first lap steel wire comprises head end head, and head end head and second encloses steel wire and conflicts and connect, and the 4th circle steel wire comprises end head, and end head and the 3rd encloses steel wire and conflicts and connect.
Further, described first lap steel wire is provided with the first plane, and the first plane and fixed base are fitted, and the 4th circle steel wire is provided with the second plane, and the second plane and Mobile base are fitted.
Further, described piston rod slidably connects cushion pad.
Further, the diameter of described first bumping post is identical with the internal diameter that first lap steel wire and second encloses steel wire respectively, and described second diameter blocked encloses steel wire and the 4th respectively, and to enclose the internal diameter of steel wire identical with the 3rd.
Further, the described cushion pad stressed pad that comprises loose power pad and be connected with the first loose power pad.
Contrast the deficiencies in the prior art, the beneficial effect that the technological scheme that the utility model provides is brought: 1. first lap steel wire of the present utility model is provided with the first plane, first plane and fixed base are fitted, 4th circle steel wire is provided with the second plane, second plane and Mobile base are fitted, and the diameter of the first bumping post is identical with the internal diameter that first lap steel wire and second encloses steel wire respectively, described second diameter blocked encloses steel wire and the 4th respectively, and to enclose the internal diameter of steel wire identical with the 3rd, and first lap steel wire comprises head end head, head end head and second encloses steel wire and conflicts and connect, 4th circle steel wire comprises end head, end head and the 3rd encloses steel wire and conflicts and connect, make the head and the tail two ends of spring effectively spacing, prevent the head and the tail two ends of spring from fixed base and Mobile base, relative bounce-back occurring, the head and the tail two ends of spring and fixed base and Mobile base are effectively fitted, the head and the tail two ends of spring can not be deformed, extend the working life of cushion pad.2. the utility model is slidably connected by piston rod and cushion pad, and the stressed pad of cylindrical shape that cushion pad comprises round table-like loose power pad and is connected with loose power pad, the external diameter of stressed pad is greater than the barrel dliameter of cylinder barrel.Make vibration damper suspension ring when bearing larger external force; cushion pad slides; frictional force serves as cushion effect; and the side of round table-like loose power pad can disperse strength; and the stressed pad of cylindrical shape can absorb strength; effective protection and support whole cushion pad and be not damaged, extends the working life of cushion pad.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of spring.
Embodiment
With reference to Fig. 1-Fig. 2, the utility model is described further.
A kind of rear shock absorber, comprise piston assembly, piston assembly comprises piston rod 1, it is characterized in that: one end of described piston assembly is connected with fixed base 2, the other end is connected with Mobile base 3, described fixed base 2 is provided with the first bumping post 21 of cylindrical shape, described Mobile base 3 is provided with the second bumping post 31 of cylindrical shape, described piston assembly outer cover is provided with spring 4, spring 4 comprises the first spring section 5 and the second spring section 6, the pitch of the first spring section 5 and the pitch of the second spring section 6 are than being 1.5-2, described first spring section 5 comprises first lap steel wire 51 and the second circle steel wire 52, described second spring section 6 comprises the 3rd circle steel wire 61 and the 4th circle steel wire 62.
First lap steel wire 51 is provided with the first plane 511, first plane 511 is fitted with fixed base 2, 4th circle steel wire 62 is provided with the second plane 621, second plane 621 is fitted with Mobile base 3, and the diameter of the first bumping post 21 is identical with the internal diameter that first lap steel wire 51 and second encloses steel wire 52 respectively, the diameter of described second bumping post 31 encloses steel wire 61 and the 4th respectively, and to enclose the internal diameter of steel wire 62 identical with the 3rd, and first lap steel wire 51 comprises head end head 512, head end head 512 and second encloses steel wire 52 and conflicts and connect, 4th circle steel wire 62 comprises end head 622, end head 622 and the 3rd encloses steel wire 61 and conflicts and connect, make the head and the tail two ends of spring 4 effectively spacing, prevent the head and the tail two ends of spring 4 from fixed base 2 and Mobile base 3, relative bounce-back occurring, the head and the tail two ends of spring 4 and fixed base 2 and Mobile base 3 are effectively fitted, the head and the tail two ends of spring 4 can not be deformed.
Be slidably connected by piston rod 1 and cushion pad 7, and the stressed pad 72 of cylindrical shape that cushion pad 7 comprises round table-like loose power pad 71 and is connected with loose power pad 71, the external diameter of stressed pad 72 is greater than the barrel dliameter of cylinder barrel.Make vibration damper suspension ring when bearing larger external force; cushion pad 7 slides; frictional force serves as cushion effect; and the side of round table-like loose power pad 71 can disperse strength; and the stressed pad 72 of cylindrical shape can absorb strength; effective protection and support whole cushion pad 7 and be not damaged, extends the physical life of cushion pad 7.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, those skilled in the art carries out common change and replaces should being included in protection domain of the present utility model within the scope of technical solutions of the utility model.