Planetary gear mechanical stepless speed change drive axle

Abstract

The invention relates to the technical field of driving, in particular to a planetary gear mechanical stepless speed change drive axle which comprises a shell, a planetary gear box, an output shaft, a first hydraulic box, a rear variable-diameter belt wheel and a steel belt and further comprises an input shaft, a second hydraulic box, a front variable-diameter belt wheel, a pressure adjusting assembly, a pushing piece, a resistance assembly and a mounting block. The input shaft is connected with the output end of the planetary gear box, the second hydraulic box is connected with the input shaft, the front variable-diameter belt wheel is connected with the input shaft, the pressure adjusting assembly is connected with the front variable-diameter belt wheel, the pushing piece is connected with the pressure adjusting assembly, and the resistance assembly is connected with the pressure adjusting assembly. The mounting block is connected with the resistance assembly, the steel belt is connected to the surface of the front variable-diameter belt wheel and the surface of the rear variable-diameter belt wheel, and the purpose of improving the transmission stability of the front variable-diameter belt wheel and the steel belt is achieved by adjusting the pressure on the steel belt.

Description

Technical Field

[0001] The present invention relates to the field of drive technology, in particular to a planetary gear mechanical continuously variable transmission drive axle. Background Art

[0002] The planetary gear mechanical continuously variable transmission axle is a continuously variable transmission drive system that connects planetary gears. It realizes the forward and reverse rotation of the continuously variable transmission drive system by clamping the sun gear, planet carrier and outer ring gear of the planetary gear respectively.

[0003] The working process of the continuously variable transmission system is to control the distance between the front and rear variable diameter pulleys through the hydraulic system, and make the distance between the front and rear variable diameter pulleys change inversely. The steel belt is connected to the surface of the front and rear variable diameter pulleys. The change in the size of the distance between the front and rear variable diameter pulleys makes the rotation diameter of the two ends of the steel belt change inversely, thereby realizing stepless speed change. The front variable diameter pulley is connected to the power output end of the planetary gear, and then the stability of the transmission between the front variable diameter pulley and the steel belt determines the stability of the transmission in the wheel transmission system. Since the front variable diameter pulley is relatively stationary when driving the steel belt to rotate, the wear on the steel belt is reduced. The smaller the gear ratio, the smaller the belt will be. However, the rotating diameter of the steel belt is adjusted by the squeezing force of the front variable diameter pulley on the steel belt. Therefore, when the transmission ratio needs to be increased quickly, the spacing between the front variable diameter pulleys is reduced to squeeze the steel belt, causing the steel belt to expand on the surface of the front variable diameter pulley. The squeezing force generated during the squeezing process will aggravate the wear of the steel belt, thereby reducing the fit between the steel belt and the front variable diameter pulley, resulting in slippage during use. When the transmission ratio is quickly reduced, the front drive pulley needs to be separated, which will cause the steel belt to lose the squeezing force from the front drive pulley. At this time, the friction between the front drive pulley and the steel belt is reduced when the steel belt is rotated, which can easily cause the steel belt to slip during the process of driving the steel belt to rotate.

[0004] In response to the problem that the extrusion pressure of the front drive pulley will affect the transmission efficiency of the steel belt, the existing technology provides some solutions. For example, the continuously variable transmission with publication number CN104595442B reduces the probability of slipping by increasing the contact area between the belt and the driving pulley. Although the slippage between the belt and the driving pulley is reduced during the transmission process, the increased friction will further aggravate the wear between the steel belt and the driving pulley, thereby reducing the fit and affecting the service life.

[0005] Therefore, a planetary gear mechanical continuously variable transmission drive axle is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a planetary gear mechanical continuously variable transmission drive axle, which solves the problem that the extrusion force of the front variable diameter pulley on the steel belt will affect the transmission efficiency of the steel belt, and achieves the purpose of improving transmission stability by adjusting the pressure on the steel belt during the diameter change process.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A planetary gear mechanical continuously variable transmission drive axle comprises a housing, a planetary gearbox, an output shaft, a first hydraulic tank, a rear variable diameter pulley and a steel belt, wherein the planetary gearbox is connected to the housing, the output shaft is connected to the housing, the first hydraulic tank is connected to the output shaft, and the rear variable diameter pulley is connected to the output shaft. The axle also comprises an input shaft, a second hydraulic tank, a front variable diameter pulley, a pressure regulating assembly, a pushing member, a resistance assembly and a mounting block, wherein the input shaft is connected to the output end of the planetary gearbox, the second hydraulic tank is connected to the input shaft, the front variable diameter pulley is connected to the input shaft, the pressure regulating assembly is connected to the front variable diameter pulley, the pushing member is connected to the pressure regulating assembly, the resistance assembly is connected to the pressure regulating assembly, and the mounting block is connected to the resistance assembly. The steel belt is connected to the surfaces of the front variable diameter pulley and the rear variable diameter pulley. When the front variable diameter pulley changes diameter, the resistance assembly limits the pressure regulating assembly. The pressure regulating assembly slides in the front variable diameter pulley to adjust the pressure on the steel belt, and the pushing member pushes the pressure regulating assembly to reset in the variable diameter pulley.

[0009] Through the above scheme, the pressure of the pressure regulating assembly on the steel belt can be adjusted, thereby achieving the purpose of adjusting the pressure on the steel belt according to the diameter changing direction of the front variable diameter pulley, and effectively avoiding slippage between the front variable diameter pulley and the steel belt.

[0010] Preferably, the front variable diameter pulley includes a fixed pulley, a movable pulley and a slot, the fixed pulley and the movable pulley are both connected to the input shaft, the movable pulley is connected to the power output end of the second hydraulic box, the facing surfaces of the fixed pulley and the movable pulley are conical, and a plurality of slots are opened at equal angles along the central axis of the input shaft on the surfaces of the fixed pulley and the movable pulley, thereby controlling the rotation diameter of the steel belt on the surfaces of the fixed pulley and the movable pulley by controlling the distance between the fixed pulley and the movable pulley, thereby achieving the purpose of controlling the transmission amount.

[0011] Preferably, the longitudinal cross-section of the notch is an isosceles trapezoid with the short side facing the input shaft, and chamfers are provided on both sides of the notch.

[0012] Through the above scheme, the fixed pulley and the movable pulley will gradually increase the rotating diameter of the steel belt during the extrusion process. The chamfer setting can reduce the wear of the steel belt and the edge of the groove during the process of pressure diffusion of the steel belt. At the same time, the shape setting of the groove, on the one hand, makes the steel belt gradually separate from the groove during the expansion process, thereby achieving the purpose of reducing the wear of the edge of the steel belt. On the other hand, it can increase the resistance of the steel belt during the contraction process, and then adapt to the shape change of the steel belt. At the same time, the existence of resistance effectively ensures the stability of the transmission between the steel belt and the fixed pulley and the movable pulley.

[0013] Preferably, the pressure regulating assembly includes a fixed block, a sliding plate and a movable part, and the multiple fixed blocks are respectively connected to the opposite surfaces of the fixed pulley and the movable pulley, the sliding plate is slidingly connected to the fixed block, the longitudinal cross-section of the fixed block is trapezoidal, and the sliding plate is connected to the movable part.

[0014] The above solution facilitates the movement of the movable part, and the trapezoidal setting of the fixed block cross section reduces the friction between the sliding disk and the fixed block during the rotation of the sliding disk, thereby facilitating the sliding of the sliding disk.

[0015] Preferably, the movable part includes a connecting block, a movable block and a convex strip, the connecting block is connected to the sliding plate, the movable block is connected to the connecting block, the convex strip is connected to the movable block, the movable block slides in the groove, and there is a gap between the facing surfaces of the movable blocks on both sides and the facing surfaces of the fixed pulley and the movable pulley.

[0016] Through the above scheme, the position of the convex strip can be adjusted to control the contact area between the steel belt and the front variable diameter pulley during rotation. The contact area between the steel belt and the front variable diameter pulley is reduced through the gap between the movable block and the front variable diameter pulley.

[0017] Preferably, the longitudinal cross-section of the convex strip is an isosceles trapezoid with the short side facing outwards, and the convex strip is centrally arranged on the surface of the movable block.

[0018] Through the above scheme, the friction area between the steel strip and the steel strip can be increased when the steel strip shrinks. At the same time, the extrusion force on the steel strip can be increased by the convex strip, thereby increasing the pressure on the steel strip when it shrinks, thereby achieving the purpose of balancing the front and rear extrusion forces of the steel strip.

[0019] Preferably, the pushing member includes a spring plate and a limiting block, the spring plate is connected to the sliding plate, the limiting blocks are connected to both ends of the spring plate, and the spring plate is in a "V" shape.

[0020] Through the above scheme, a driving force is generated on the sliding plate, which effectively ensures the fit between the sliding plate and the front variable diameter pulley. At the same time, through the structural design of the spring plate, the centrifugal force generated by the spring plate during rotation can further increase the driving force on the sliding plate. At the same time, the limit blocks are connected to both ends of the spring plate, thereby achieving a good limiting effect on the spring plate.

[0021] Preferably, the resistance assembly includes a connecting frame, a connecting plate, a deceleration rubber ring, and a clamping frame. The connecting frame is connected to the sliding disc, the connecting plate is connected to the connecting frame, the deceleration rubber ring is connected to the connecting plate, and the clamping frame is connected to the deceleration rubber ring. The longitudinal cross-section of the connecting plate frame is semicircular, and the connecting frame is connected to the housing via a mounting block. Thus, the longitudinal cross-section of the connecting frame is circular, thereby reducing interference with the sliding disc's rotation trajectory during its rotation, thereby improving the sliding disc's rotational stability.

[0022] Preferably, the deceleration rubber ring includes a connecting section, a deformation section, an adhesion section and a cavity, the connecting section is connected to the connecting plate, the deformation section is connected to the connecting section, the adhesion section is connected to the connecting section, and the connecting section, deformation section and adhesion section form a cavity.

[0023] Through the above solution, the friction between the card frame and the card frame can be increased when the card frame moves quickly. By increasing the contact area between the adhesion section and the card frame when moving quickly, the movement speed of the sliding disks on both sides is slowed down, and the cavity facilitates deformation of the deformation section.

[0024] Preferably, the card frame includes a card plate and a wedge plate, the card plate is slidably connected to the housing, and the contact surface between the wedge plate and the adhesion section is an inclined surface.

[0025] Through the above scheme, the inclined surface can gradually increase the resistance between the wedge plate and the adhesion section, thereby reducing the problem of large friction with the sliding plate caused by the large movement distance of the fixed block connected to the second hydraulic cylinder, resulting in a large thrust of the sliding plate, thereby achieving the purpose of good support effect for the sliding plates on both sides.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention solves the problem that the extrusion pressure of the front variable diameter pulley on the steel belt affects the transmission efficiency of the steel belt. By setting a front variable diameter pulley and opening a trapezoidal notch on the surface of the front variable diameter pulley, the contact area with the front variable diameter pulley is increased or reduced during the radial movement of the steel belt, thereby ensuring the transmission effect of the steel belt with the front variable diameter pulley.

[0028] 2. By setting a pressure-regulating component, the pressure on the side wall of the steel belt is controlled, and the pressure on the steel belt is reduced when the rotation diameter of the steel belt expands, thereby avoiding the problem of large wear on the side wall of the steel belt caused by excessive pressure. When the rotation diameter of the steel belt decreases, the pressure between the steel belt and the steel belt is increased, thereby achieving the purpose of improving the rotation stability of the steel belt. By setting different states of the pressure-regulating component according to the different radial movement directions of the steel belt, the stability of the steel belt transmission efficiency is effectively guaranteed.

[0029] 3. By setting up a resistance component, different pressure states are generated for the radial movement of the steel belt in different directions. By making the axial diameter change speed of the resistance component smaller than the axial diameter change speed of the front variable diameter pulley, support forces in different directions are generated on the pressure regulating component, thereby effectively ensuring the regulating effect of the pressure regulating component on the steel belt, and further ensuring the stability of the steel belt transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0031] Figure 2 This is a schematic structural diagram of the front variable diameter pulley portion of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the notch portion of the present invention;

[0033] Figure 4 This is a schematic structural diagram of the voltage regulating component of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the rear view angle of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the resistance component part of the present invention;

[0036] Figure 7 For the present invention Figure 6 A magnified schematic diagram of point A;

[0037] Figure 8 This is a schematic diagram of the structure of the present invention after the distance between the front variable diameter pulleys is reduced.

[0038] In the figure: 1, housing; 2, planetary gearbox; 3, output shaft; 4, first hydraulic box; 5, rear variable diameter pulley; 6, steel belt; 7, input shaft; 8, second hydraulic box; 9, front variable diameter pulley; 901, fixed pulley; 902, movable pulley; 903, notch; 10, pressure regulating assembly; 1001, fixed block; 1002, sliding plate; 1003, movable part; 10031, connecting block; 10032, movable Block; 10033, convex strip; 11, pusher; 1101, spring plate; 1102, limit block; 12, resistance assembly; 1201, connecting frame; 1202, connecting plate; 1203, deceleration rubber ring; 12031, connecting section; 12032, deformation section; 12033, adhesion section; 12034, cavity; 1204, bracket; 12041, bracket; 12042, wedge plate; 13, mounting block. DETAILED DESCRIPTION

[0039] The following, in conjunction with the accompanying drawings of the embodiments of the present invention, clearly and completely describes the technical solutions of the embodiments of the present invention, making its working state and structural features more detailed. Obviously, the embodiments described are only partial embodiments of the present invention and are not complete embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making any creative ideas are all within the scope of protection of the present invention.

[0040] See also Figures 1 to 8 The present invention provides a planetary gear mechanical continuously variable transmission drive axle, and the technical solution is as follows:

[0041] For details, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8A planetary gear mechanical continuously variable transmission drive axle includes a housing 1, a planetary gearbox 2, an output shaft 3, a first hydraulic tank 4, a rear variable diameter pulley 5 and a steel belt 6. The planetary gearbox 2 is connected to the housing 1, the output shaft 3 is connected to the housing 1, and the output shaft 3 is located on the rear side of the planetary gearbox 2. The surface of the output shaft 3 is connected to the first hydraulic tank 4 and the rear variable diameter pulley 5, and the rear variable diameter pulley 5 is connected to the first hydraulic tank 4 (the rear variable diameter pulley 5 is divided into two sections, one section is fixed on the output shaft 3, and the other section is movably engaged with the output shaft 3 and connected to the power output end of the first hydraulic tank 4. The power of the first hydraulic tank 4 pushes the other section of the rear variable diameter pulley 5 to slide on the surface of the output shaft 3, and the facing surfaces of the two sections of the rear variable diameter pulley 5 are conical). It also includes an input shaft 7, a second hydraulic tank 8, a front variable diameter pulley 9, and a pressure regulating component 10. , pushing member 11, resistance assembly 12 and mounting block 13, the input shaft 7 is connected to the output end of the planetary gearbox 2, the second hydraulic tank 8 is connected to the input shaft 7, the second hydraulic tank 8 is connected to the right end of the input shaft 7, the front variable diameter pulley 9 is connected to the input shaft 7, the pressure regulating assembly 10 is connected to the front variable diameter pulley 9, the pushing member 11 is connected to the pressure regulating assembly 10, the resistance assembly 12 is connected to the pressure regulating assembly 10, the mounting block 13 is connected to the resistance assembly 12, and the side of the mounting block 13 away from the resistance assembly 12 is connected to the housing 1, the steel belt 6 is connected to the surface of the front variable diameter pulley 9 and the surface of the rear variable diameter pulley 5. When the front variable diameter pulley 9 changes diameter, the resistance assembly 12 limits the pressure regulating assembly 10, and the pressure regulating assembly 10 slides in the front variable diameter pulley 9 to adjust the pressure on the steel belt 6. The pushing member 11 pushes the pressure regulating assembly 10 to reset in the front variable diameter pulley 9;

[0042] The front variable diameter pulley 9 includes a fixed pulley 901, a movable pulley 902 and a notch 903. The fixed pulley 901 and the movable pulley 902 are both connected to the input shaft 7. The fixed pulley 901 is fixedly connected to the input shaft 7. The movable pulley 902 is slidably connected to the input shaft 7 along the axis of the input shaft 7. The movable pulley 902 is connected to the power output end of the second hydraulic box 8. The second hydraulic box 8 drives the movable pulley 902 to slide on the surface of the input shaft 7. The facing surfaces of the fixed pulley 901 and the movable pulley 902 are conical. The side surface of the steel belt 6 contacts the conical surfaces of the fixed pulley 901 and the movable pulley 902. A plurality of notches 903 are opened at equal angles on the surfaces of the fixed pulley 901 and the movable pulley 902 along the central axis of the input shaft 7. The longitudinal section of the notch 903 is an isosceles trapezoid with the short side facing the input shaft 7. When the belt 6 rotates, the steel belt 6 is relatively stationary with the fixed pulley 901 and the movable pulley 902, and the steel belt 6 is in inclined contact with the slot 903, thereby increasing the resistance of the fixed pulley 901 and the movable pulley 902 when driving the steel belt 6 to move in a circular motion. When the pitch is changed, friction occurs between the steel belt 6 and the fixed pulley 901 and the movable pulley 902. Through the trapezoidal slot 903 with the smaller end pointing downward, the edge of the steel belt 6 is gradually separated from the slot 903 when the steel belt 6 expands, thereby reducing the friction between the steel belt 6 and the edge of the slot 903, making it easier for the steel belt 6 to move on the surfaces of the fixed pulley 901 and the movable pulley 902. When the steel belt 6 contracts, the edge of the steel belt 6 contacts the slot 903, thereby increasing the friction between the steel belt 6 and the steel belt 6, thereby improving the stability of the steel belt 6 when it contracts. Chamfers are provided on both sides of the slot 903 to facilitate the sliding of the steel belt 6.

[0043] It should be noted that the steel belt 6 is formed by stacking a plurality of thrust blocks, and the thrust blocks are connected by ring assemblies.

[0044] By setting the front variable diameter pulley 9, the purpose of generating resistance in different directions to the steel belt 6 when the front variable diameter pulley 9 changes its diameter is achieved. By setting the notch 903, when the steel belt 6 expands, the contact between the edge of the steel belt 6 and the notch 903 is gradually expanded, and then when the steel belt 6 moves, the edge of the steel belt 6 gradually moves to the notch 903, and then the resistance between the steel belt 6 and the notch 903 is gradually reduced. At the same time, the trapezoidal shape of the notch 903 slows down the speed at which the contact area of ​​the steel belt 6 with the fixed pulley 901 and the movable pulley 902 increases, thereby achieving the purpose of reducing friction. When the steel belt 6 contracts, the edge of the steel belt 6 generates friction with the edge of the notch 903, thereby achieving the purpose of increasing the resistance of the steel belt 6 when it contracts, and improving the stability of the steel belt 6 during transmission.

[0045] As an embodiment of the present invention, refer to Figure 4 、 Figure 5 and Figure 8, the pressure regulating assembly 10 includes a fixed block 1001, a sliding plate 1002 and a movable part 1003, and the multiple fixed blocks 1001 are respectively connected to the opposite surfaces of the fixed pulley 901 and the movable pulley 902, the left fixed block 1001 is connected to the planetary gear box 2, and the right fixed block 1001 is connected to the second hydraulic box 8, the sliding plate 1002 is slidably connected to the fixed block 1001, and the longitudinal cross-section of the fixed block 1001 is trapezoidal, so that when rotating, the centrifugal force generated by the sliding plate 1002 is outward, by making the long side of the trapezoid of the fixed block 1001 face the input shaft 7, so that the force point of the sliding plate 1002 during the rotation process is located at the long side of the trapezoid of the fixed block 1001, thereby reducing the sliding resistance between the side of the sliding plate 1002 and the side of the fixed block 1001, facilitating the sliding of the sliding plate 1002 and the fixed block 1001 during rotation, and the sliding plate 1002 is connected to the movable part 1003;

[0046] The movable member 1003 includes a connecting block 10031, a movable block 10032 and a convex strip 10033. The connecting block 10031 is connected to the sliding plate 1002, the movable block 10032 is connected to the connecting block 10031, the convex strip 10033 is connected to the movable block 10032, the movable block 10032 slides in the slot 903, the shape of the movable block 10032 is adapted to the slot 903, the number of the movable blocks 10032 corresponds to the number of the slot 903, and the facing surfaces of the movable blocks 10032 on both sides are connected to the fixed pulley 901 and the movable belt There is a gap between the opposing surfaces of the pulleys 902. The existence of the gap reduces the contact area between the steel belt 6 and the fixed pulley 901 and the movable pulley 902, thereby reducing the friction between the front variable diameter pulley and the steel belt 6 when the diameter 9 is changed. At the same time, the edge of the notch 903 will contact the steel belt 6, thereby increasing the resistance of the steel belt 6 to the notch 903 when it contracts, thereby achieving the purpose of improving transmission stability. The longitudinal section of the convex strip 10033 is an isosceles trapezoid with the short side facing outward. The convex strip 10033 is centered on the surface of the movable block 10032, thereby achieving the purpose of expanding the steel belt 6. During the stretching process, the steel belt 6 changes from being in contact with the side walls of the fixed pulley 901 and the movable pulley 902 to being out of contact (moving from the convex strip 10033 to the gap between the facing surface of the movable block 10032 and the facing surface of the fixed pulley 901 and the movable pulley 902), thereby reducing the friction. At the same time, during the contraction process of the steel belt 6, the steel belt 6 changes from being in contact with the side walls of the fixed pulley 901 and the movable pulley 902 to being out of contact, thereby increasing the movement resistance with the edge of the steel belt 6, and improving the stability of the steel belt 6 in contact with the side walls of the fixed pulley 901 and the movable pulley 902 during the rotation process. The pusher 11 includes a spring plate 1 101 and a limit block 1102, the spring plate 1101 is connected to the sliding plate 1002, the limit blocks 1102 are connected to both ends of the spring plate 1101, the limit blocks 1102 limit both ends of the spring plate 1101, the spring plate 1101 is in a "V" shape, and thus the spring plate 1101 is opened from the side close to the input shaft 7 to the side away from the input shaft 7, and then during the rotation of the spring plate 1101, it is affected by the centrifugal force, and the "V"-shaped tip of the spring plate 1101 is thrown outward, thereby achieving the purpose of increasing the elastic force of the spring plate 1101.

[0047] By setting up the pressure regulating component 10, when the rotating diameter of the steel belt 6 expands, the convex strip 10033 is separated from the steel belt 6, reducing the contact area with the steel belt 6, thereby achieving the purpose of reducing friction. When the rotating diameter of the steel belt 6 decreases, the convex strip 10033 squeezes the steel belt 6, thereby increasing the resistance between the steel belt 6 and the fixed pulley 901 and the movable pulley 902, thereby improving the stability of the transmission.

[0048] As an embodiment of the present invention, refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 8The resistance assembly 12 includes a connecting frame 1201, a connecting plate 1202, a deceleration rubber ring 1203 and a bracket 1204. The connecting frame 1201 is fixedly connected to the sliding plate 1002. The connecting frame 1201 is connected to the housing 1 through the mounting block 13. The mounting block 13 can slide horizontally on the housing 1, and then the connecting frame 1201 can slide horizontally with the housing 1. The connecting plate 1202 is fixedly connected to the connecting frame 1201, the deceleration rubber ring 1203 is connected to the connecting plate 1202, and the deceleration rubber ring 1203 is connected to the bracket 1204. The end of the deceleration rubber ring 1203 away from the connecting frame 1201 extends to the outside of the bracket 1204. The longitudinal section of the connecting plate 1202 is The surface is semicircular, and the deceleration rubber ring 1203 includes a connecting section 12031, a deformation section 12032 and an adhesion section 12033. A part of the connecting section 12031 is connected to the connecting plate 1202, and the other part of the connecting section 12031 is suspended. The deformation section 12032 is connected to the connecting section 12031, and the adhesion section 12033 is connected to the connecting section 12031. The connecting section 12031, the deformation section 12032 and the adhesion section 12033 form a cavity 12034. The bracket 1204 includes a bracket 12041 and a wedge plate 12042. The bracket 1204 is slidably connected to the shell 1, and the contact surface between the wedge plate 12042 and the adhesion section 12033 is a slope.

[0049] By setting up the resistance component 12, when the front variable diameter pulley 9 changes diameter rapidly, the adhesion section 12033 is deformed to increase the contact area with the wedge plate 12042, thereby increasing the resistance between the wedge plate 12042 and the deceleration rubber ring 1203, and the moving speed of the connecting plates 1202 on both sides is slowed down, thereby forming a good support effect, thereby achieving the purpose of controlling the distance between the sliding plates 1002 on both sides.

[0050] During transmission, the output power is transmitted to the planetary gearbox 2, and the direction of power output is controlled by the planetary gearbox 2. The planetary gearbox 2 drives the front variable diameter pulley 9 to rotate through the input shaft 7. The steel belt 6 fits with the front variable diameter pulley 9, and then when the front variable diameter pulley 9 rotates, it drives the steel belt 6 to transmit power. The steel belt 6 transmits power to the output shaft 3 through the rear variable diameter pulley 5. When the front variable diameter pulley 9 is transmitting, it is relatively stationary with the steel belt 6, so the friction is small.

[0051] When the front variable diameter pulley 9 is rapidly shortened, the second hydraulic cylinder pushes the movable pulley 902 to move laterally on the input shaft 7, thereby reducing the distance between the movable pulley 902 and the fixed pulley 901, and the rotation diameter of the steel belt 6 around the movable pulley 902 and the fixed pulley 901 gradually increases. At this time, the steel belt 6 located on the conical surface of the movable pulley 902 and the fixed pulley 901 moves outward under the influence of the extrusion force, and rubs against the fixed pulley 901 and the movable pulley 902. Since the side of the notch 903 is an isosceles trapezoid with the short side facing the input shaft 7, the edge of the steel belt 6 moves to the notch 90 3, it is gradually separated from the notch 903, and the side edge of the steel belt 6 moves from the state of contact with the fixed pulley 901 or the movable pulley 902 to the state of not contacting the fixed pulley 901 or the movable pulley 902 at the notch 903, so that the section of the steel belt 6 does not rub against the fixed pulley 901 or the movable pulley 902. At the same time, due to the squeezing force of the fixed pulley 901 and the movable pulley 902 on the steel belt 6, a good transmission effect can still be maintained when the friction force of the steel belt 6 is weakened. When the front variable diameter pulley 9 is slowly shortened, the same as above is achieved, thereby achieving the purpose of reducing friction;

[0052] When the front variable diameter pulley 9 is rapidly shortened, the right sliding plate 1002 is affected by the friction force of the fixed block 1001 when it moves, and will move synchronously with the fixed block 1001. At this time, the sliding plate 1002 drives the deceleration rubber ring 1203 to rub on the surface of the wedge plate 12042 through the connecting frame 1201 and the connecting plate 1202. When the moving speed is fast, the adhesion section 12033 is deformed, increasing the contact area with the wedge plate 12042, thereby improving the connection strength between the wedge plate 12042 and the right sliding plate 1002, and then transmitting power to the left deceleration rubber ring 1203. The left deceleration rubber ring 1203 is deformed, so that the power on both sides is transmitted to the left sliding plate 1002 at this time. Due to the adhesion of the deceleration rubber ring 1203, the distance change between the sliding plates 1002 on both sides is smaller than that between the fixed pulley 901 and the movable pulley. The changing speed of 902 causes the spring plates 1101 on both sides to bend, and under the action of the connecting block 10031 and the movable block 10032, the convex strip 10033 leaves the conical surface of the fixed pulley 901 and the movable pulley 902, thereby reducing the friction between the steel belt 6 and the front variable diameter pulley 9. When the front variable diameter pulley 9 is slowly shortened, the moving speed of the deceleration rubber ring 1203 slows down, and the deformation amplitude is reduced. The sliding plates 1002 on both sides follow the fixed pulley 901 and the movable pulley 902 to shrink, thereby making the convex strip 10033 fit on the conical surface of the fixed pulley 901 and the movable pulley 902, ensuring the friction between the steel belt 6 and the fixed pulley 901 and the movable pulley 902. When the variable diameter speed slows down or stabilizes, the spring plate 1101 pushes the sliding plate 1002 to reset, thereby making the convex strip 10033 reset and fit on the surface of the steel belt 6.

[0053] When the front variable diameter pulley 9 is rapidly expanding, the steel belt 6 slides on the surface of the front variable diameter pulley 9 and shortens its rotational diameter. A pull is generated between the deceleration rubber ring 1203 and the wedge plate 12042, so that the sliding plates 1002 on both sides are tightly attached to the surfaces of the fixed pulley 901 and the movable pulley 902 respectively. The pressure of the convex strip 10033 on the steel belt 6 is increased by the influence of the sliding plate 1002, thereby improving the stability of the transmission of the steel belt 6. At the same time, during the downward movement of the steel belt 6, the edge of the steel belt 6 moves from the groove 903 to contact the fixed pulley 901 and the movable pulley 902, thereby increasing the resistance to the steel belt 6, thereby partially improving the transmission stability of the steel belt 6.

[0054] Although the embodiments of the present invention have been described, it is possible for those skilled in the art to change and modify the embodiments to obtain other effects with an understanding of the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A planetary gear mechanical continuously variable transmission drive axle, comprising a housing (1), a planetary gearbox (2), an output shaft (3), a first hydraulic box (4), a rear variable diameter pulley (5) and a steel belt (6), wherein the planetary gearbox (2) is connected to the housing (1), the output shaft (3) is connected to the housing (1), the first hydraulic box (4) is connected to the output shaft (3), and the rear variable diameter pulley (5) is connected to the output shaft (3), characterized in that: It also includes an input shaft (7), a second hydraulic box (8), a front variable diameter pulley (9), a pressure regulating assembly (10), a pusher (11), a resistance assembly (12) and a mounting block (13), wherein the input shaft (7) is connected to the output end of the planetary gear box (2), the second hydraulic box (8) is connected to the input shaft (7), the front variable diameter pulley (9) is connected to the input shaft (7), the pressure regulating assembly (10) is connected to the front variable diameter pulley (9), and the pusher (11) is connected to the pressure regulating assembly (10). The resistance assembly (12) is connected to the pressure regulating assembly (10), the mounting block (13) is connected to the resistance assembly (12), the steel belt (6) is connected to the surface of the front variable diameter pulley (9) and the surface of the rear variable diameter pulley (5), when the front variable diameter pulley (9) changes diameter, the resistance assembly (12) limits the pressure regulating assembly (10), the pressure regulating assembly (10) slides in the front variable diameter pulley (9) to adjust the pressure on the steel belt (6), and the pushing member (11) pushes the pressure regulating assembly (10) to reset in the variable diameter pulley.

2. The planetary gear mechanical continuously variable transmission drive axle according to claim 1, characterized in that: The front variable diameter pulley (9) comprises a fixed pulley (901), a movable pulley (902) and a notch (903); the fixed pulley (901) and the movable pulley (902) are both connected to the input shaft (7); the movable pulley (902) is connected to the power output end of the second hydraulic box (8); the facing surfaces of the fixed pulley (901) and the movable pulley (902) are conical; and a plurality of notches (903) are provided at equal angles on the surfaces of the fixed pulley (901) and the movable pulley (902) along the central axis of the input shaft (7).

3. The planetary gear mechanical continuously variable transmission drive axle according to claim 2, characterized in that: The longitudinal section of the notch (903) is an isosceles trapezoid with the short side facing the input shaft (7), and chamfers are provided on both sides of the notch (903).

4. The planetary gear mechanical continuously variable transmission drive axle according to claim 2, characterized in that: The pressure regulating assembly (10) comprises a fixed block (1001), a sliding plate (1002) and a movable part (1003); a plurality of the fixed blocks (1001) are respectively connected to opposite surfaces of a fixed pulley (901) and a movable pulley (902); the sliding plate (1002) is slidably connected to the fixed block (1001); the longitudinal cross-section of the fixed block (1001) is trapezoidal; and the sliding plate (1002) is connected to the movable part (1003).

5. The planetary gear mechanical continuously variable transmission drive axle according to claim 4, characterized in that: The movable member (1003) comprises a connecting block (10031), a movable block (10032) and a convex strip (10033); the connecting block (10031) is connected to the sliding plate (1002); the movable block (10032) is connected to the connecting block (10031); the convex strip (10033) is connected to the movable block (10032); the movable block (10032) slides in the slot (903); and there is a gap between the facing surfaces of the movable block (10032) on both sides and the facing surfaces of the fixed pulley (901) and the movable pulley (902).

6. The planetary gear mechanical continuously variable transmission drive axle according to claim 5, characterized in that: The longitudinal cross-section of the convex strip (10033) is an isosceles trapezoid with the short side facing outwards, and the convex strip (10033) is centrally arranged on the surface of the movable block (10032).

7. The planetary gear mechanical continuously variable transmission drive axle according to claim 6, characterized in that: The pushing member (11) comprises a spring plate (1101) and a limiting block (1102); the spring plate (1101) is connected to the sliding plate (1002); the limiting block (1102) is connected to both ends of the spring plate (1101); and the spring plate (1101) is in a "V" shape.

8. The planetary gear mechanical continuously variable transmission drive axle according to claim 6, characterized in that: The resistance assembly (12) comprises a connecting frame (1201), a connecting plate (1202), a deceleration rubber ring (1203) and a clamping frame (1204); the connecting frame (1201) is connected to the sliding plate (1002); the connecting plate (1202) is connected to the connecting frame (1201); the deceleration rubber ring (1203) is connected to the connecting plate (1202); the clamping frame (1204) is connected to the deceleration rubber ring (1203); the deceleration rubber ring (1203) extends from one end of the connecting frame (1201) to the outside of the clamping frame (1204); the longitudinal cross-section of the connecting plate (1202) is semicircular; and the connecting frame (1201) is connected to the housing (1) via a mounting block (13).

9. The planetary gear mechanical continuously variable transmission drive axle according to claim 8, characterized in that: The deceleration rubber ring (1203) includes a connecting section (12031), a deformation section (12032), an adhesion section (12033) and a cavity (12034), wherein the connecting section (12031) is connected to the connecting plate (1202), the deformation section (12032) is connected to the connecting section (12031), and the adhesion section (12033) is connected to the connecting section (12031), and the connecting section (12031), the deformation section (12032) and the adhesion section (12033) form a cavity (12034).

10. The planetary gear mechanical continuously variable transmission drive axle according to claim 9, characterized in that: The card frame (1204) comprises a card plate (12041) and a wedge plate (12042); the card plate (12041) is slidably connected to the housing (1); and the contact surface between the wedge plate (12042) and the adhesion section (12033) is an inclined surface.

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