A continuously variable transmission with optimized lubrication and cooling effects

Abstract

The present invention discloses a continuously variable transmission with optimized lubrication and cooling effects, comprising an active component, a driven component and a transmission component. The overall stability and reliability of the continuously variable transmission are improved by overall setting of the continuously variable transmission and reasonable setting of a driven pressurized elastic element.

Description

Technical Field

[0001] The invention relates to the field of transmissions, and in particular to a continuously variable transmission with optimized lubrication and cooling effects. Background Art

[0002] Existing mechanically pressurized continuously variable transmissions mostly use disc springs or cams for pressurization on the active and driven components. Such pressurization methods mostly use two bearings on each shaft to support the speed regulating mechanism to isolate the high-speed rotation of the transmission shaft and the low-speed rotation of the speed regulating shaft. Chinese invention patent publication CN110762174A discloses a cam-pressurized cone-disc continuously variable transmission, which improves the reliability of the entire system through a specific cam pressurization method, but this structure almost completely closes the space between the two bearings, and the lubrication and cooling of the two bearings are greatly hindered, thereby affecting the stability and reliability of the system to a certain extent. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a continuously variable transmission to solve the problems of the prior art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A continuously variable transmission for optimizing lubrication and cooling effects, the continuously variable transmission comprising an active component, a driven component and a transmission component, the active component comprising an active shaft, an active fixed cone disc, an active drive cone disc, an active pressurizing elastic element, a limiting component and an active bearing; the active fixed cone disc is coaxially sleeved on the active shaft, the active drive cone disc is coaxially sleeved on the active shaft, and the active drive cone disc can slide along the axial direction of the active shaft but cannot rotate relatively, the active drive cone disc and the conical surfaces of the active fixed cone disc are arranged oppositely, a limiting component is sleeved on the active shaft at the rear end of the active drive cone disc, the active pressurizing elastic element is sleeved on the active shaft, one end of the active pressurizing elastic element is abutted against the rear end of the active drive cone disc, the other end of the active pressurizing elastic element is abutted against the limiting component, and the active bearings are arranged at both ends of the active shaft.

[0006] The driven component includes a driven shaft, a driven fixed cone disc, a driven movable cone disc, a driven pressurized elastic element, a speed regulating component and a driven bearing; the driven fixed cone disc is coaxially sleeved on the driven shaft, the driven movable cone disc is coaxially sleeved on the driven shaft, and the driven movable cone disc can slide along the axial direction of the driven shaft but cannot rotate relatively, the driven movable cone disc and the conical surface of the driven fixed cone disc are arranged opposite to each other, the speed regulating component includes a speed regulating bearing I and a speed regulating bearing II, the speed regulating bearing I is sleeved on the rear end of the driven movable cone disc, the speed regulating bearing II is sleeved on the driven shaft at the rear of the driven movable cone disc, the driven pressurized elastic element is sleeved on the driven shaft, and one end of the driven pressurized elastic element is abutted against the rear end of the driven movable cone disc, the other end of the driven pressurized elastic element is abutted against the driven shaft or the speed regulating bearing II, and the driven bearings are arranged at both ends of the driven shaft.

[0007] The transmission component is a chain, a steel belt or other flexible transmission element; one end of the transmission component is clamped by an active fixed cone disc and an active driven cone disc, and the other end of the transmission component is clamped by a driven fixed cone disc and a driven driven cone disc. The transmission component is used to transmit the power of the active component to the driven component.

[0008] The inner diameter of the active pressure elastic element is d1, and the inner diameter of the passive pressure elastic element is d2, where d1 <d2。

[0009] Preferably, at least one of the active driven cone disc and the active fixed cone disc, the driven driven cone disc and the driven fixed cone disc (preferably the one with the highest horizontal position) is provided with an annular ring at its outer edge (preferably the one with the highest horizontal position can reduce the oil stirring loss), the cone disc provided with the annular ring is defined as an annular ring cone disc, the axis of the annular ring coincides with the axis of the annular ring cone disc, the revolving generatrix of the outer cylindrical surface or the outer conical surface of the annular ring is a straight line, the width of the annular ring along the axis of the annular ring cone disc is Tc, and Tc is the distance from the intersection of the cone disc generatrix and the annular ring generatrix of the annular ring cone disc to the outer edge of the other end of the annular ring along the axis of the annular ring cone disc, and Tc satisfies:

[0010] (D11+D12+D21+D22)*TAN(11°) / 4>Tc>(D11+D12+D21+D22)*TAN(11°) / 16.

[0011] Preferably, the active pressure elastic element is a disc spring or a coil spring.

[0012] Preferably, the driven pressure elastic element is a coil spring, and the rotation direction of the coil spring is opposite to the main working rotation direction of the driven shaft.

[0013] The maximum speed of the driven shaft is n2 rpm (revolutions / minute), the wire diameter (diameter) of the coil spring (i.e. the spiral diameter) is dmm (millimeter), the median diameter (radius) of the coil spring (i.e. the radius of the entire spring) is R mm (millimeter), and the helical angle when the coil spring is compressed to the maximum stroke is α, satisfying:

[0014] d 2 ×R×tan(α)×n2>15000mm 3 / min;

[0015] And / or the wire diameter of the coil spring is greater than or equal to 1 / 120 of the center distance.

[0016] Preferably, the continuously variable transmission also includes a continuously variable transmission housing, and the position of the continuously variable transmission housing containing the active component, the driven component and the transmission component is defined as the inner side of the housing, and the opposite side is defined as the outer side of the housing; the upper part of the continuously variable transmission in the vertical direction of the installation and working state is defined as the upper part of the housing, and the opposite side is defined as the lower part of the housing.

[0017] An oil storage area (preferably the outside of the shell) is provided on the outer side of the shell or the inner side of the shell at the upper part of the continuously variable transmission shell; the oil storage area is a relatively closed space surrounded by the oil storage area shell, and the oil storage area shell is provided with an oil storage area oil inlet and an oil storage area oil outlet.

[0018] A case oil outlet is provided on the case of the continuously variable transmission near a pair of cone discs at a lower horizontal position among the active movable cone disc and the active fixed cone disc, and the driven movable cone disc and the driven fixed cone disc; a case oil outlet pipe is provided on the outside of the case, one end of the case oil outlet pipe is connected to the case oil outlet, and the other end of the case oil outlet pipe is connected to the oil inlet of the oil storage area.

[0019] Preferably, the oil outlet of the oil storage area is connected to one or more oil outlet pipes of the oil storage area, wherein at least one oil outlet pipe of the oil storage area points to the small radius of the cone disk surrounded by the transmission element.

[0020] The diameter of the oil outlet pipe of at least one oil storage area is Dout, wherein Dout≥(D11+D12+D21+D22) / 400.

[0021] The diameter of the oil outlet pipe of the casing is Din, where Din≥Dout.

[0022] The internal volume of the oil storage area excluding the oil storage area inlet and oil storage area outlet is V, where V ≥ ((D11+D12+D21+D22) / 100) 3 .

[0023] Preferably, the speed regulating component further comprises a speed regulating nut and a speed regulating screw, wherein the speed regulating nut is connected to the driven cone disk via a speed regulating bearing I, and the speed regulating screw is connected to the driven shaft via a speed regulating bearing II; or the speed regulating screw is connected to the driven cone disk via a speed regulating bearing I, and the speed regulating nut is connected to the driven shaft via a speed regulating bearing II, and an anti-rotation element is further provided on the continuously variable transmission housing, and the anti-rotation element prevents the speed regulating screw or the speed regulating nut from rotating by abutting against the speed regulating screw or the speed regulating nut.

[0024] The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating shaft bearing, a speed regulating gear shaft, a speed regulating large gear and a speed regulating small gear; the speed regulating gear shaft is arranged in parallel with the driven shaft, the speed regulating gear shaft is driven by the speed regulating motor, a speed regulating shaft bearing is sleeved on the outer sleeve of the speed regulating gear shaft, a speed regulating small gear is arranged on the speed regulating gear shaft between the two speed regulating shaft bearings, a speed regulating large gear is installed on the speed regulating nut or the speed regulating screw, and the speed regulating small gear is meshed with the speed regulating large gear.

[0025] Preferably, the speed regulating component further includes a speed regulating cam I, a speed regulating cam II and a cam ball, one end of the speed regulating cam II is mounted on the driven shaft via a speed regulating bearing II, the other end of the speed regulating cam II is provided with a cam roller, and the cam ball is provided in the roller; one end of the speed regulating cam I is mounted on the driven cone disk via a speed regulating bearing I, the other end of the speed regulating cam I is also provided with a cam roller, the two cam rollers are arranged opposite to each other and are contact-mounted at the joint via the cam ball.

[0026] The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating shaft bearing, a speed regulating gear shaft, a speed regulating large gear I, a speed regulating small gear I, a speed regulating large gear II and a speed regulating small gear II.

[0027] A large speed regulating gear I is installed on the outside of the speed regulating cam I, and a large speed regulating gear II is installed on the outside of the speed regulating cam II. The speed regulating gear shaft is driven by a speed regulating motor. Speed ​​regulating shaft bearings are arranged at both ends of the speed regulating gear shaft. A small speed regulating gear I and a small speed regulating gear II are respectively arranged on the speed regulating gear shaft between the two speed regulating shaft bearings. The small speed regulating gear I is meshed with the large speed regulating gear I, and the small speed regulating gear II is meshed with the large speed regulating gear II.

[0028] Preferably, the speed regulating mechanism also includes a two-way overrunning clutch, which is arranged between the speed regulating motor and the speed regulating gear shaft, and is coaxially sleeved on the speed regulating gear shaft. The setting direction of the two-way overrunning clutch is: to enable power to be transmitted from the speed regulating motor to the speed regulating gear shaft, but not from the speed regulating gear shaft to the speed regulating motor.

[0029] Preferably, the two-way overrunning clutch comprises an input shaft, an output shaft, a transmission steel ball and an outer cover; at least one pawl is arranged on the input shaft, at least one group of grooves is arranged on the output shaft, each group of grooves is two symmetrically arranged grooves, the transmission steel ball is installed in the groove, the outer cover is sleeved on the outer diameter of the output shaft, and the outer cover is installed in contact with the transmission steel ball; the pawl of the input shaft is sleeved on the outer diameter of the output shaft, each group of steel balls is distributed on both sides of a pawl, when the input shaft rotates clockwise, the pawl can transfer power to the steel ball by contacting one of the steel balls in one group, and then transfer it to the output shaft through the steel ball; when the input shaft rotates counterclockwise, the pawl transfers power to the output shaft by contacting another steel ball in one group; when the input shaft does not rotate and there is power transmission on the output shaft other than the input shaft, the groove on the output shaft will push the transmission steel ball to generate a radial force, so that the transmission steel ball is close to the inner diameter of the outer cover, and friction is generated between the two to prevent the output shaft from rotating. The function of the device is: whether it is positive or negative power, it can be transferred from the input shaft to the output shaft, but the output shaft cannot transfer power to the input shaft.

[0030] Preferably, the speed regulating component also includes a speed regulating cam I, a speed regulating cam II and a cam ball, one end of the speed regulating cam II is mounted on the driven shaft through a speed regulating bearing II, the other end of the speed regulating cam II is provided with a cam roller, and the cam ball is arranged in the roller; one end of the speed regulating cam I is mounted on the driven cone disk through a speed regulating bearing I, and the other end of the speed regulating cam I is also provided with a cam roller, the two cam rollers are arranged opposite to each other and are contacted and installed at the connection point through the cam ball, and an anti-rotation element is also arranged on the continuously variable transmission housing, the anti-rotation element is abutted against the speed regulating cam I or the speed regulating cam II, and the anti-rotation element is used to prevent the speed regulating cam I or the speed regulating cam II from rotating.

[0031] The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating worm wheel and a speed regulating worm. The speed regulating worm is driven by the speed regulating motor, and the speed regulating worm wheel is fixedly connected to a speed regulating cam that is not provided with the anti-rotation element. The speed regulating motor drives the speed regulating worm wheel to rotate through the speed regulating worm, thereby driving the speed regulating cam that is not provided with the anti-rotation element to rotate. The speed regulating cam provided with the anti-rotation element has its rotation speed limited by the anti-rotation element, and the speed regulating cam provided with the anti-rotation element is caused to move axially by the rotating speed regulating cam, thereby realizing speed regulation.

[0032] Preferably, the active pressure elastic element is one or more disc springs, and a wire ring is provided between each disc spring.

[0033] Preferably, the active bearing and the driven bearing are respectively connected to the continuously variable transmission housing.

[0034] A power machine is provided with the above-mentioned continuously variable transmission.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. Through the overall setting of the continuously variable transmission and the reasonable setting of the driven pressure elastic element, as well as the reasonable setting of the relationship between the inner diameters of the active pressure elastic element and the driven pressure elastic element, the driven pressure element is used as a lubricating oil driving device, and the spiral line of the driven pressure element is driven by the driven shaft to drive the lubricating oil, thereby effectively lubricating and cooling the speed regulating bearing that is difficult to lubricate using conventional means. The lubrication and cooling capacity of this driving device is related to the speed, which perfectly meets the heating and lubrication requirements of the speed regulating bearing; by specifically limiting the relationship between its size ratio and the driven shaft, under the principle of minimizing the increase in cost, the existing structure is maximized, without adding extra weight, and the efficiency is optimized, thereby improving the stability and reliability of the system.

[0037] 2. By setting up an oil storage area with a specific structure and connection method, the lubrication and cooling conditions under extreme conditions of the use scenario are greatly improved. When the power machinery moves violently, the lubricating oil may be briefly thrown to one side, thereby losing the lubrication effect. The present invention sets up a specific oil storage area to ensure that each component can still be fully lubricated during this time period. During violent movement, the power of the lubricating oil is used to pump the oil out, and then it flows back by gravity. Since this area also has an additional cooling function, a lubrication and cooling arrangement is set for the difficult areas of cooling and lubrication at the same time. The preferred oil storage area is set on the outside of the shell, which will be more conducive to the implementation of the project and improve the stability and reliability of the system as a whole.

[0038] 3. The present invention sets a specific cam speed regulating mechanism, and the overall structure is no longer closed, which effectively improves the lubrication conditions of the speed regulating mechanism. At the same time, by improving the cam speed regulating mechanism, the efficiency of the cam speed regulating mechanism is improved, thereby reducing heat generation and alleviating the burden on the cooling system.

[0039] 4. The present invention provides a specific two-way overrunning clutch and cooperates with the motor and cam speed regulation. When speed regulation is not required, the motor does not need to apply a holding torque, which greatly reduces the heat generation under harsh heat dissipation conditions, thereby reducing the burden on the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The figure is a schematic structural diagram of a continuously variable transmission according to an embodiment of the present invention.

[0041] Figure 2 It is a schematic structural diagram of a continuously variable transmission according to another embodiment of the present invention.

[0042] Figure 3It is a schematic structural diagram of a continuously variable transmission according to a third embodiment of the present invention.

[0043] Figure 4 It is a schematic structural diagram of a continuously variable transmission according to a fourth embodiment of the present invention.

[0044] Figure 5 It is a schematic structural diagram of a continuously variable transmission according to a fifth embodiment of the present invention.

[0045] Figure 6 It is a schematic structural diagram of a side cross-sectional view of the disc spring of the present invention.

[0046] Figure 7 It is a schematic structural diagram of a side cross-sectional view of a coil spring of the present invention.

[0047] Figure 8 It is a schematic cross-sectional structural diagram of the bidirectional overrunning clutch of the present invention.

[0048] Among them, 1-driving shaft; 2-driving fixed cone disk; 3-transmission component; 4-driving active cone disk; 5-driving pressure elastic element; 6-limiting component; 7-driving bearing; 8-driven shaft; 9-driven fixed cone disk; 10-driven driven cone disk; 11-speed regulating bearing I; 12-speed regulating nut; 13-speed regulating gear shaft; 14-speed regulating shaft bearing; 15-speed regulating motor; 16-speed regulating bearing II; 17-speed regulating screw; 18-driven shaft bearing; 19-driven pressure elastic element; 20-anti-rotation element; 21-speed regulating gear; 22 -speed regulating pinion; 23-bidirectional overrunning clutch, 101-speed regulating cam I; 102-speed regulating cam II; 103-speed regulating worm; 104-cam ball; 105-speed regulating worm wheel, 201-speed regulating gear II; 202-speed regulating pinion II; 203-speed regulating gear I; 204-speed regulating pinion I; 301-input shaft; 302 output shaft; 303 transmission steel ball; 304 outer cover; 305 pawl; d1-disc spring inner diameter; D1-disc spring outer diameter; d2-helical spring inner diameter; D2-helical spring outer diameter. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] Example 1

[0052] Reference Figure 1 It can be seen that the continuously variable transmission of this embodiment includes an active component, a driven component and a transmission component, wherein the active component includes an active shaft, an active fixed cone disc, an active drive cone disc, an active pressurizing elastic element, a limiting component and an active bearing; the active fixed cone disc is coaxially sleeved on the active shaft, the active drive cone disc is coaxially sleeved on the active shaft, and the active drive cone disc can slide along the axial direction of the active shaft but cannot rotate relatively, the active drive cone disc and the conical surface of the active fixed cone disc are arranged opposite to each other, a limiting component (a conventional existing limiting component, such as a shoulder, a clamping ring, etc.) is sleeved on the active shaft at the rear end of the active drive cone disc, the active pressurizing elastic element is sleeved on the active shaft, and one end of the active pressurizing elastic element is abutted against the rear end of the active drive cone disc, and the other end of the active pressurizing elastic element is abutted against the limiting component, and the active bearings are arranged at both ends of the active shaft.

[0053] The driven component includes a driven shaft, a driven fixed cone disc, a driven movable cone disc, a driven pressurized elastic element, a speed regulating component and a driven bearing; the driven fixed cone disc is coaxially sleeved on the driven shaft, the driven movable cone disc is coaxially sleeved on the driven shaft, and the driven movable cone disc can slide along the axial direction of the driven shaft but cannot rotate relatively, the driven movable cone disc and the conical surface of the driven fixed cone disc are arranged opposite to each other, the speed regulating component includes a speed regulating bearing I and a speed regulating bearing II, the speed regulating bearing I is sleeved on the rear end of the driven movable cone disc, the speed regulating bearing II is sleeved on the driven shaft at the rear of the driven movable cone disc, the driven pressurized elastic element is sleeved on the driven shaft, and one end of the driven pressurized elastic element is abutted against the rear end of the driven movable cone disc, and the other end of the driven pressurized elastic element is abutted against the speed regulating bearing II, and the driven bearings are arranged at both ends of the driven shaft.

[0054] The transmission component is a chain, a steel belt or other flexible transmission element; one end of the transmission component is clamped by an active fixed cone disc and an active driven cone disc, and the other end of the transmission component is clamped by a driven fixed cone disc and a driven driven cone disc. The transmission component is used to transmit the power of the active component to the driven component.

[0055] like Figure 7As shown, the inner diameter of the active pressure elastic element (disc spring) is d1, and the inner diameter of the passive pressure elastic element (helical spring) is d2, where d1 <d2。

[0056] The driven pressure elastic element is a coil spring, and the rotation direction of the coil spring is opposite to the main working rotation direction of the driven shaft;

[0057] The maximum speed n2 of the driven shaft is 6000 rpm (revolutions / minute), the wire diameter (diameter) d of the coil spring is 2 mm (millimeters), the mean diameter (radius) R of the coil spring is 50 mm (millimeters), and the helical angle α when the coil spring is compressed to the maximum stroke is 1 degree, satisfying: d 2 ×R×tan(α)×n2>15000mm 3 / min;

[0058] The speed regulating component also includes a speed regulating nut and a speed regulating screw. The speed regulating nut is connected to the driven cone disk through a speed regulating bearing I, and the speed regulating screw is connected to the driven shaft through a speed regulating bearing II. An anti-rotation element is also provided on the continuously variable transmission housing, and the anti-rotation element prevents the speed regulating screw from rotating by abutting against the speed regulating screw.

[0059] The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating shaft bearing, a speed regulating gear shaft, a speed regulating large gear and a speed regulating small gear; the speed regulating gear shaft is arranged in parallel with the driven shaft and the driving shaft, the speed regulating gear shaft is driven by the speed regulating motor, a speed regulating shaft bearing is sleeved on the outside of the speed regulating gear shaft, a speed regulating small gear is arranged on the speed regulating gear shaft between the two speed regulating shaft bearings, a speed regulating large gear is installed on the speed regulating nut, and the speed regulating small gear is meshed with the speed regulating large gear.

[0060] Comparative Example 1

[0061] The maximum speed n2 of the driven shaft of this comparative example is 3000 rpm (revolutions / minute), the wire diameter (diameter) d of the coil spring is 1.5 mm (millimeters), the mean diameter (radius) R of the coil spring is 30 mm (millimeters), and the helical lead angle α when the coil spring is compressed to the maximum stroke is 0.8 degrees, which does not meet: d 2 ×R×tan(α)×n2>15000mm 3 / min, and other settings are the same as those in Example 1. Through life testing, it is found that the life is reduced by 42% relative to that in Example 1 (due to the deterioration of the oil pumping effect).

[0062] Example 2

[0063] Reference Figure 2It can be seen that the other components of this embodiment are arranged in the same manner as those of Embodiment 1, except that the speed regulating component further includes a speed regulating cam I, a speed regulating cam II and a cam ball (for example, a steel ball), one end of the speed regulating cam II is mounted on the driven shaft through a speed regulating bearing II, the other end of the speed regulating cam II is provided with a cam roller, and the cam ball is arranged in the roller; one end of the speed regulating cam I is mounted on the driven cone disk through a speed regulating bearing I, the other end of the speed regulating cam I is also provided with a cam roller, and the two cam rollers are arranged opposite to each other and are contact-mounted at the joint through the cam ball.

[0064] The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating shaft bearing, a speed regulating gear shaft, a speed regulating large gear I, a speed regulating small gear I, a speed regulating large gear II and a speed regulating small gear II. The speed regulating large gear I is installed on the outside of the speed regulating cam I, and the speed regulating large gear II is installed on the outside of the speed regulating cam II. The speed regulating gear shaft is driven by the speed regulating motor, and speed regulating shaft bearings are arranged at both ends of the speed regulating gear shaft. The speed regulating small gear I and the speed regulating small gear II are respectively arranged on the speed regulating gear shaft between the two speed regulating shaft bearings, and the speed regulating small gear I is meshed with the speed regulating large gear I, and the speed regulating small gear II is meshed with the speed regulating large gear II.

[0065] Comparative Example 2

[0066] The other settings of this comparative example are the same as those of Example 2, except that the steel balls in the cam raceway are replaced with cylindrical rollers. After experimental comparison, the speed regulation speed of this comparative example is reduced by 23% compared with that of Example 2.

[0067] Example 3

[0068] Reference Figure 3 It can be seen that the other components of this embodiment are arranged in the same manner as those of Embodiment 1, except that the speed regulating mechanism is arranged as follows: the speed regulating mechanism includes a speed regulating motor, a speed regulating worm wheel and a speed regulating worm, the speed regulating worm is driven by the speed regulating motor, the speed regulating worm wheel is fixedly connected to the speed regulating screw, the speed regulating motor drives the speed regulating worm wheel to rotate through the speed regulating worm, and then drives the speed regulating screw to rotate, the speed regulating nut is restricted from rotation by the anti-rotation element, and the axial movement of the speed regulating nut is achieved due to the rotation of the speed regulating screw.

[0069] Comparative Example 3

[0070] The other settings in this comparative example are the same as those in Example 3, except that the speed regulating worm wheel and the speed regulating worm are replaced by a cylindrical gear reduction device. Through testing, the transmission ratio of this comparative example cannot be stable, resulting in large fluctuations in system operation and a system life reduced by 80% compared with Example 3.

[0071] Example 4

[0072] Reference Figure 4 It can be seen that the other components of this embodiment are arranged in the same manner as those of Embodiment 2, except that the speed regulating mechanism is arranged as follows: the speed regulating mechanism includes a speed regulating motor, a speed regulating worm wheel and a speed regulating worm, the speed regulating worm is driven by the speed regulating motor, the speed regulating worm wheel is fixedly connected to the speed regulating cam II, the speed regulating motor drives the speed regulating worm wheel to rotate through the speed regulating worm, and then drives the cam II to rotate, an anti-rotation element is arranged outside the speed regulating cam I to limit its rotation speed, and the rotation of the speed regulating cam II causes the speed regulating cam I to move axially, thereby realizing speed regulation.

[0073] Comparative Example 4

[0074] The other settings in this comparative example are the same as those in Example 4, except that no anti-rotation element is provided outside the speed regulating cam I. According to the test results, the two groups of cams cannot rotate relative to each other during speed regulation in this comparative example, and the transmission ratio cannot be changed.

[0075] Example 5

[0076] Reference Figure 5 It can be seen that the other components of this embodiment are arranged in the same manner as those of embodiment 2, except that the speed regulating gear shaft is further provided with a Figure 8 The bidirectional overrunning clutch shown is arranged on the speed regulating gear shaft between the speed regulating shaft bearing and the speed regulating motor.

[0077] Comparative Example 5

[0078] The other settings in this comparative example are the same as those in Example 5, except that the two-way overrunning clutch is cancelled. According to the test results, the transmission ratio of this comparative example cannot be stabilized, the system fluctuates greatly during transmission, and the service life is reduced by 76% compared with Example 5.

Claims

1. A continuously variable transmission for optimizing lubrication and cooling effects, the continuously variable transmission comprising an active component, a driven component and a transmission component, the active component comprising an active shaft, an active fixed cone disc, an active drive cone disc, an active pressurizing elastic element, a limiting component and an active bearing; the active fixed cone disc is coaxially sleeved on the active shaft, the active drive cone disc is coaxially sleeved on the active shaft, and the active drive cone disc can slide along the axial direction of the active shaft but cannot rotate relatively, the active drive cone disc and the conical surface of the active fixed cone disc are arranged oppositely, a limiting component is sleeved on the active shaft at the rear end of the active drive cone disc, the active pressurizing elastic element is sleeved on the active shaft, and one end of the active pressurizing elastic element is abutted against the rear end of the active drive cone disc, and the other end of the active pressurizing elastic element is abutted against the limiting component, and the active bearings are arranged at both ends of the active shaft; The driven component includes a driven shaft, a driven fixed cone disc, a driven movable cone disc, a driven pressure elastic element, a speed regulating component and a driven bearing; the driven fixed cone disc is coaxially sleeved on the driven shaft, the driven movable cone disc is coaxially sleeved on the driven shaft, and the driven movable cone disc can slide along the axial direction of the driven shaft but cannot rotate relatively, and the driven movable cone disc is arranged opposite to the conical surface of the driven fixed cone disc; The transmission component is a chain, a steel belt or other flexible transmission element; a part of the transmission component is clamped by an active fixed cone disc and an active driven cone disc, and another part of the transmission component is clamped by a driven fixed cone disc and a driven driven cone disc, and the transmission component is used to transmit the power of the active component to the driven component; The speed regulating component includes a speed regulating bearing I and a speed regulating bearing II, wherein the speed regulating bearing I is sleeved on the rear end of the driven cone disc, and the speed regulating bearing II is sleeved on the driven shaft at the rear of the driven cone disc, and the driven pressurizing elastic element is sleeved on the driven shaft, and one end of the driven pressurizing elastic element is against the rear end of the driven cone disc, and the other end of the driven pressurizing elastic element is against the driven shaft or the speed regulating bearing II, and the driven bearings are arranged at both ends of the driven shaft; It is characterized in that The inner diameter of the active pressure elastic element is d1, and the inner diameter of the passive pressure elastic element is d2, where d1 <d2; The driven pressure elastic element is a coil spring; the coil spring is used as a lubricating oil driving device, and the driven shaft drives the spiral line of the coil spring to drive the lubricating oil to lubricate and cool the speed regulating bearing I and the speed regulating bearing II; The maximum speed of the driven shaft is n2 rpm, the diameter of the coil spring is d mm, the radius of the coil spring is R mm, and the helical angle when the coil spring is compressed to the maximum stroke is α, satisfying: d 2 ×R×tan(α)×n2>15000mm 3 / min.

2. The continuously variable transmission according to claim 1, characterized in that: The continuously variable transmission also includes a continuously variable transmission housing, the position of the continuously variable transmission housing containing the active component, the driven component and the transmission component is defined as the inner side of the housing, and the opposite side is defined as the outer side of the housing; the upper part of the continuously variable transmission in the vertical direction of the installation and working state is defined as the upper part of the housing, and the opposite side is defined as the lower part of the housing; An oil storage area is provided on the outer side of the casing or the inner side of the casing at the upper part of the continuously variable transmission casing; the oil storage area is a relatively closed space surrounded by the oil storage area casing, and an oil storage area oil inlet and an oil storage area oil outlet are provided on the oil storage area casing; A case oil outlet is provided on the case of the continuously variable transmission near a pair of lower cone discs in a horizontal position among the active movable cone disc and the active fixed cone disc, and the driven movable cone disc and the driven fixed cone disc; a case oil outlet pipe is provided on the outside of the case, one end of the case oil outlet pipe is connected to the case oil outlet, and the other end of the case oil outlet pipe is connected to the oil inlet of the oil storage area; The oil outlet of the oil storage area is connected to one or more oil storage area oil outlet pipes, wherein at least one oil storage area oil outlet pipe points to the small radius of the cone disk surrounded by the transmission component; The diameter of the oil outlet pipe of at least one oil storage area is Dout; the diameter of the oil outlet pipe of the shell is Din, wherein Din≥Dout.

3. The continuously variable transmission according to claim 2, characterized in that: The speed regulating component further comprises a speed regulating cam I, a speed regulating cam II and a cam ball, one end of the speed regulating cam II is mounted on the driven shaft via a speed regulating bearing II, the other end of the speed regulating cam II is provided with a cam roller, the cam ball is provided in the roller; one end of the speed regulating cam I is mounted on the driven cone disk via a speed regulating bearing I, the other end of the speed regulating cam I is also provided with a cam roller, the two cam rollers are arranged opposite to each other and are contact-mounted at the joint via the cam ball; The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating shaft bearing, a speed regulating gear shaft, a speed regulating large gear I, a speed regulating small gear I, a speed regulating large gear II and a speed regulating small gear II; A large speed regulating gear I is installed on the outside of the speed regulating cam I, and a large speed regulating gear II is installed on the outside of the speed regulating cam II. The speed regulating gear shaft is driven by a speed regulating motor. Speed ​​regulating shaft bearings are arranged at both ends of the speed regulating gear shaft. A small speed regulating gear I and a small speed regulating gear II are respectively arranged on the speed regulating gear shaft between the two speed regulating shaft bearings. The small speed regulating gear I is meshed with the large speed regulating gear I, and the small speed regulating gear II is meshed with the large speed regulating gear II.

4. The continuously variable transmission according to claim 3, characterized in that: The speed regulating mechanism also includes a two-way overrunning clutch, which is arranged between the speed regulating motor and the speed regulating gear shaft. The two-way overrunning clutch is coaxially sleeved on the speed regulating gear shaft. The setting direction of the two-way overrunning clutch is: to enable power to be transmitted from the speed regulating motor to the speed regulating gear shaft, but not from the speed regulating gear shaft to the speed regulating motor.

5. The continuously variable transmission according to claim 4, characterized in that: The two-way overrunning clutch comprises an input shaft, an output shaft, a transmission steel ball and an outer cover; at least one pawl is arranged on the input shaft, and at least one group of grooves is arranged on the output shaft, each group of the grooves is two symmetrically arranged grooves, and the transmission steel balls are installed in the grooves, and the outer cover is sleeved on the outer diameter of the output shaft, and the outer cover is installed in contact with the transmission steel balls; the pawl of the input shaft is sleeved on the outer diameter of the output shaft, and each group of steel balls is distributed on both sides of a pawl, and when the input shaft rotates clockwise, the pawl can transfer power to the steel ball by contacting one of the steel balls in one group, and then transfer it to the output shaft through the steel ball; when the input shaft rotates counterclockwise, the pawl transfers power to the output shaft by contacting another steel ball in one group; when the input shaft does not rotate and there is power transmission on the output shaft other than the input shaft, the groove on the output shaft will push the transmission steel ball to generate a radial force, so that the transmission steel ball is close to the inner diameter of the outer cover, and friction is generated between the two to prevent the output shaft from rotating.

6. The continuously variable transmission according to claim 2, characterized in that: The speed regulating component further comprises a speed regulating cam I, a speed regulating cam II and a cam ball, one end of the speed regulating cam II is mounted on the driven shaft via a speed regulating bearing II, the other end of the speed regulating cam II is provided with a cam roller, the cam ball is provided in the roller; one end of the speed regulating cam I is mounted on the driven cone disk via a speed regulating bearing I, the other end of the speed regulating cam I is also provided with a cam roller, the two cam rollers are arranged opposite to each other and are contact-mounted at the joints via the cam ball, an anti-rotation element is further provided on the continuously variable transmission housing, the anti-rotation element is abutted against the speed regulating cam I or the speed regulating cam II, and the anti-rotation element is used to prevent the speed regulating cam I or the speed regulating cam II from rotating; The continuously variable transmission also includes a speed regulating mechanism, which includes a speed regulating motor, a speed regulating worm wheel and a speed regulating worm. The speed regulating worm is driven by the speed regulating motor, and the speed regulating worm wheel is fixedly connected to a speed regulating cam that is not provided with the anti-rotation element. The speed regulating motor drives the speed regulating worm wheel to rotate through the speed regulating worm, thereby driving the speed regulating cam that is not provided with the anti-rotation element to rotate. The speed regulating cam provided with the anti-rotation element has its rotation speed limited by the anti-rotation element, and the speed regulating cam provided with the anti-rotation element is caused to move axially by the rotating speed regulating cam, thereby realizing speed regulation.

7. A power machine, characterized in that: The power machine is provided with a continuously variable transmission as claimed in any one of claims 1 to 6.

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