[0029] The present invention will be further described below with reference to the drawings and embodiments.
[0030] As shown in the figure, the infinitely variable clutch for the ATV in this embodiment includes a driving wheel combination, a transmission belt 1 and a driven wheel combination. The driving wheel combination includes a driving shaft 2, a driving disc 3 fixed on the driving shaft, The movable wheel 4 on the shaft and slidingly matched with the driving shaft, and the ramp plate 5 fixed on the driving shaft; the driven wheel combination includes the driven shaft 6, the fixed disk 7 fixed on the driven shaft, and the driven shaft The movable plate 8 on the shaft and slidingly matched with the driven shaft, and the guide device;
[0031] A sliding block 9 is arranged between the moving wheel and the ramp plate, and a guide groove 10 for positioning the sliding block is arranged on the moving wheel. The bottom of the guiding groove is an arc-shaped curved surface, and the sliding block is in contact with the bottom of the guiding groove. The surface is also an arc-shaped curved surface, and the radius of curvature of the arc-shaped curved surface on the slider is smaller than the radius of curvature of the arc-shaped curved surface at the bottom of the guide groove; the surface of the ramp plate that matches the slider is an inclined plane, and the slider is set There are a number of semi-cylindrical protrusions 11, the axis of the semi-cylindrical shape is staggered and perpendicular to the axis of the driving shaft, and the slider is in contact with the inclined plane of the ramp plate through the semi-cylindrical protrusion;
[0032] The guide device includes a radial pin 12 fixedly arranged at the end of the moving disc, a roller 13 arranged on the radial pin, and a guide block 14 arranged on the fixed disc. The guide block is provided with a cylindrical surface of the roller. Cooperating spiral guide slope 15.
[0033] In this embodiment, the ATV continuously variable clutch uses a sliding block to push the moving wheel to move along the driving shaft to realize the speed change. Since the sliding block and the ramp plate have more semi-cylindrical protrusions in contact with each other, each semi-cylindrical The surface and the inclined plane of the ramp plate bear less pressure at the contact part, and because the semi-cylindrical protrusion and the ramp plate are in line contact, the contact friction resistance is small, and the heat generation is small, so the semi-cylindrical surface will not appear during the speed change process. The sliding block is stuck due to the deformation of the ramp plate, and the speed is stable. At the same time, the sliding block wears little during the speed change and has a long service life.
[0034] Furthermore, the continuously variable transmission clutch of the ATV in this embodiment guides the movement track of the moving wheel during the speed change process through the roller and the spiral guide inclined surface matched with the roller, because the moving wheel has to bear the axial direction of the transmission belt during the speed change process. The thrust also bears the circumferential torsion force of the transmission belt, so the moving plate will make a spiral movement, and the spiral guide slope set on the guide block can meet the movement track requirements of the moving plate, so the guiding structure has little resistance to the moving plate. In turn, the pressing force between the moving wheel and the transmission belt is correspondingly small, and the friction between the corresponding ones is also relatively small. At the same time, the rotating movement of the moving plate can further reduce the friction between it and the transmission belt, so it can be guaranteed during the speed change process. The transmission belt has small wear and long life; and because of the rolling friction between the roller and the spiral guide slope, the friction and wear between the roller and the spiral guide slope during the speed change process is small, and the guide structure has a long service life.
[0035] As an improvement to this embodiment, the slider has a concave block structure, and a stiffener plate 16 is provided in the groove of the slider, and the stiffener plate is axially parallel to the driving shaft; the stiffener plate 16 can be reinforced The rigidity of the slider can further improve the deformation resistance of the arc-shaped curved surface and the cylindrical protrusion of the slider during the speed change and compression process.
[0036] As an improvement to this embodiment, a vent 17 is provided on the slider, the axial direction of the vent 17 is perpendicular to the axis of the driving shaft, and the outer surface of the ramp plate is provided with radiating fins opposite to the guide groove 18. The heat dissipation fins 18 can accelerate the frictional heat generated during the speed change process and keep the performance of the ramp plate stable. At the same time, the heat dissipation fins can further improve the deformation resistance of the inclined plane of the ramp plate during the speed change process.
[0037] As an improvement to this embodiment, the side of the slider is provided with a copper alloy antifriction layer 19 that matches with the groove walls on both sides of the guide groove. During the speed change process, the slider will lean against the guide under the action of centrifugal force. On the side wall of the groove and slide relative to the side wall, this improvement can reduce the frictional resistance and wear speed between the sliding block and the side wall of the guide groove.
[0038] As an improvement to this embodiment, the guide device further includes a stopper 20 arranged on the fixed disk, and the roller is arranged between the stopper and the guide block. During the speed change process, the speed change ends when the driven wheel reaches the maximum speed. At this time, blocking the roller by the stopper 20 can avoid the problem of circumferential misalignment and collision between the movable disk and the fixed disk under the action of inertia at the end of the shift.
[0039] As an improvement to this embodiment, the guide block is provided with a limit plane 21 connected to the lower end of the spiral guide slope. The limit plane is perpendicular to the axial direction of the movable plate, and the limit plane is used to define the movable wheel. The maximum axial movement distance can avoid the problem of over-distance movement of the movable wheel under the action of inertia force, and make the continuously variable clutch work more reliable.
[0040] As an improvement to this embodiment, the guide block includes an insert 22 made of wear-resistant alloy steel material and a mounting seat 23 made of plastic material. The insert and the mounting seat are made integral with the casting method, so The spiral guide slope is arranged on the insert. Because the spiral guide slope is arranged on the wear-resistant alloy steel insert, the wear amount of the roller and the insert is small during the speed change process, which can greatly improve the working reliability and service life of the guide structure.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be implemented Modifications or equivalent replacements without departing from the purpose and scope of the technical solution of the present invention should be covered by the scope of the claims of the present invention.
