The special shape gear of MOD driving mechanism
Technical field
The utility model relates to a kind of gear, particularly a kind of special shape gear of MOD driving mechanism.
Background technique
Driving force transfer mechanism and there is its throttle setting (country origin: China, publication number: 1439941, publication date: 2003-9-3) disclose and a kind ofly brought into play in company with rotation the throttle setting that suitable prevention power and follower do not produce the driving force transfer mechanism of the problems such as torque increase and wearing and tearing and have it in the interlock interval rotariling actuate for what prevent follower.Having in company with rotary preventing mechanism wherein: with the cam member of follower one rotation with flexiblely push the resilient member of the camming surface of this cam member; Described camming surface has: the circular arc portion in the large footpath of sliding at resilient member described in interlock interval, path part with this circular arc portion adjacency, the rib part that this path part is connected with described circular arc portion, utilize the butt position of described resilient member and described camming surface to want the load producing in the time that described path part side is passed through described rib part to described circular arc portion side shifting, stop the state of described follower in company with rotation and form.The resilient member that pushes the camming surface of this cam member is the leaf spring that two ends are fixed, the roughly neutral position of this leaf spring and camming surface butt.
Can effectively reach the object stoping in company with rotation in company with rotary preventing mechanism though above-mentioned, but its complex structure, not only follower is outer will have the special cam member of shape, but also leaf spring need to be set, to leaf spring, parts also to be set and ensure that it accurately locates, component increase, and no matter are its structure itself or production assembling, have all increased no small difficulty.
Model utility content
Model utility object: for the problems referred to above, the purpose of this utility model is to provide a kind of simple in structure, special shape gear of assembling easy MOD driving mechanism, can prevent that it is in company with rotation.
Technological scheme: a kind of special shape gear of MOD driving mechanism, comprise cylindrical body, described body center offers the endoporus with axle assembling, on the circumferential outer of described body, there is one section of gear, on described body end face, offer and be parallel to axial draw-in groove, described draw-in groove communicates with described endoporus, in described draw-in groove, is fixed with leaf spring.
Described draw-in groove inwall is provided with boss, and leaf spring is positioned.
Distance between described leaf spring and described endoporus center is less than the radius of described endoporus, makes leaf spring and axle keep the effect of mutually holding tightly.
On described leaf spring, on described draw-in groove base angle, offer the groove of form fit, be convenient to location and installation.
Described draw-in groove middle part at described endoporus homonymy, is all widened groove width at described endoporus heteropleural, described draw-in groove two ends, and the bullet of preformed plate spring becomes space.
Beneficial effect: compared with prior art, the utility model has the advantages that by set up leaf spring on special shape gear, utilize leaf spring to there is radially inside, outside elasticity, hold stationary positioned tightly with the axle being assemblied in endoporus, prevent special shape gear companion rotation under the drive of outside other gear; It is simple in structure, and it is convenient to assemble, accurate positioning, and the part of particular/special requirement is less, has reduced cost.
Brief description of the drawings
Fig. 1 is the utility model perspective view;
Fig. 2 is the utility model plan view;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the partial enlarged view I of Fig. 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiments and only be not used in restriction scope of the present utility model for the utility model is described, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present utility model.
As shown in accompanying drawing 1-4, a kind of special shape gear of MOD driving mechanism, comprise cylindrical body 1, body 1 center offers the endoporus 2 with axle assembling, body 1 has one section of gear 3 on circumferential outer, gear 3 for outside other meshed transmission gear, on body 1 end face, offer and be parallel to axial draw-in groove 4, draw-in groove 4 communicates with endoporus 2, on the both sides inwall of draw-in groove 4, be arranged with boss 6, leaf spring 5 is placed in draw-in groove 4, and boss 6 is clipped in the middle leaf spring 5 fixing, and the distance h between leaf spring 5 and endoporus 2 centers is less than the radius D/2 of endoporus 2.
Processing at endoporus 2 homonymies 9, all widened to groove width at endoporus 2 heteropleurals 8, draw-in groove 4 two ends in draw-in groove 4 middle parts, makes leaf spring in the time of bending deflection, has sufficient bullet and becomes space.
On leaf spring 5, on draw-in groove 4 base angles, offer the groove 7 of form fit.
Axle and the utility model special shape gear are assembled, hold axle tightly thereby leaf spring produces damping force to axle, its good stability, temperature influence not in using process, manufactures easily and realizes.