Operating mechanism of steel belt type continuously variable transmission and steel belt type continuously variable transmission

Abstract

The invention discloses an operating mechanism of a steel belt type continuously variable transmission and a steel belt type continuously variable transmission. The operating mechanism comprises an upshift drive assembly, a downshift drive assembly and a rotating shaft assembly; the rotating shaft assembly comprises a rotating shaft, an upshift speed change hub and a downshift speed change hub which are sequentially arranged on the rotating shaft along the axial direction of the rotating shaft, and an upshift fork and a downshift fork which are respectively arranged on the upshift speed change hub and the downshift speed change hub. During operation, when the upshift drive assembly or the downshift drive assembly drives the rotating shaft to rotate, the rotating shaft can be linked with the upshift speed change hub and the downshift speed change hub to rotate and respectively drive the upshift fork and the downshift fork to move, so that the upshift fork drives the moving wheel in the driving wheel group to approach or move away from the fixed wheel, and the downshift fork drives the moving wheel in the driven wheel group to approach or move away from the fixed wheel, so as to realize upshift or downshift operation. The operating mechanism of this structure is not only simple in structure, but also has the advantages of low loss and high efficiency.

Description

Technical Field

[0001] The invention relates to the field of automobile transmissions, and in particular to an operating mechanism of a steel belt type continuously variable transmission and a steel belt type continuously variable transmission. Background Art

[0002] The development of continuously variable transmission technology has a history of more than 100 years. Continuously variable transmission is a type of automatic transmission, which refers to a transmission system that can continuously obtain any transmission ratio within the speed range. Through continuously variable transmission, the best match between the transmission system and the engine operating conditions can be obtained. Common continuously variable transmissions include hydromechanical continuously variable transmissions, metal belt continuously variable transmissions, and variable ramp continuously variable transmissions; for steel belt continuously variable transmissions, hydraulic oil is used to push the master and slave hydraulic cylinders, that is, the hydraulic adjustment and speed ratio adjustment mechanism controlled by a microcomputer, so as to achieve the function of speed change. This type of steel belt continuously variable transmission has a relatively complex hydraulic system design. When the speed ratio is fixed, it is mainly achieved by maintaining hydraulic pressure, which results in large energy loss and low efficiency.

[0003] Therefore, the continuously variable transmission of the hydraulic system in the prior art has the problems of large energy loss and low efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of large energy loss and low efficiency of the continuously variable transmission of the hydraulic system in the prior art.

[0005] In order to solve the above technical problems, an embodiment of the present invention discloses a control mechanism of a steel belt type continuously variable transmission, which is used to adjust the wheel diameters of a driving wheel set and a driven wheel set of the steel belt type continuously variable transmission;

[0006] The operating mechanism includes an upshift drive assembly, a downshift drive assembly and a rotating shaft assembly; the rotating shaft assembly includes a rotating shaft, an upshift speed change hub and a downshift speed change hub sequentially arranged on the rotating shaft along the axial direction of the rotating shaft, and an upshift fork and a downshift fork respectively arranged on the upshift speed change hub and the downshift speed change hub; wherein,

[0007] The upshift drive assembly and the downshift drive assembly are respectively connected to the two ends of the rotating shaft, and an upshift spiral guide groove and a downshift spiral guide groove are formed on the outer peripheral wall of the upshift speed change hub and the outer peripheral wall of the downshift speed change hub. One end of the upshift fork is embedded in the upshift spiral guide groove, and the other end is used for transmission connection with the main moving wheel of the driving wheel group. One end of the downshift fork is embedded in the downshift spiral guide groove, and the other end is used for transmission connection with the main moving wheel of the driven wheel group; wherein,

[0008] When the upshift drive assembly is turned on and the downshift drive assembly is turned off, the upshift drive assembly drives the rotating shaft to rotate, and the rotating shaft links the upshift speed change hub and the downshift speed change hub to rotate, so as to respectively drive the upshift fork and the downshift fork to move in a first direction, so that the upshift fork drives the main moving wheel in the driving wheel set to approach the main fixed wheel, and the downshift fork drives the slave moving wheel in the driven wheel set to move away from the slave fixed wheel;

[0009] When the upshift drive assembly is disconnected and the downshift drive assembly is turned on, the downshift drive assembly drives the rotating shaft to rotate, and the rotating shaft links the upshift speed change hub and the downshift speed change hub to rotate, so as to respectively drive the upshift fork and the downshift fork to move in the second direction, so that the upshift fork drives the main moving wheel in the driving wheel group away from the main fixed wheel, and the downshift fork drives the slave moving wheel in the driven wheel group close to the slave fixed wheel;

[0010] The first direction is opposite to the second direction, and the first direction and the second direction are parallel to the axial direction of the rotating shaft.

[0011] By adopting the above technical solution, the operating mechanism in this embodiment includes a drive assembly, a downshift drive assembly and a rotating shaft assembly, and the rotating shaft assembly includes a rotating shaft, an upshift speed change hub and a downshift speed change hub arranged on the rotating shaft, an upshift fork and a downshift fork. The steel belt type continuously variable transmission uses the operating structure in this embodiment. During operation, when the upshift drive assembly or the downshift drive assembly drives the rotating shaft to rotate, the rotating shaft can be linked with the upshift speed change hub and the downshift speed change hub to rotate and respectively drive the upshift fork and the downshift fork to move, so that the upshift fork drives the moving wheel in the driving wheel group to approach or move away from the fixed wheel, and the downshift fork drives the moving wheel in the driven wheel group to approach or move away from the fixed wheel, so as to realize upshift or downshift. Compared with the hydraulic transmission of the speed ratio adjustment mechanism. The operating mechanism in this embodiment is not only simple in structure, but also has the advantages of low loss and high efficiency.

[0012] Furthermore, another embodiment of the present invention discloses an operating mechanism of a steel belt type continuously variable transmission, wherein the openings of the upshift spiral guide groove and the openings of the downshift spiral guide groove are both provided with limiting portions, and one end of the upshift fork and one end of the downshift fork are both provided with limited portions, and when one end of the upshift fork and one end of the downshift fork are respectively embedded in the upshift spiral guide groove and the downshift spiral guide groove, the limiting portion is engaged with the limited portion to limit one end of the upshift fork from disengaging from the upshift spiral guide groove and one end of the downshift fork from disengaging from the downshift spiral guide groove.

[0013] By adopting the above technical solution, the operating mechanism provided in the present embodiment has limiting portions arranged at the openings of the upshift spiral guide groove and the downshift spiral guide groove, so that one end of the upshift fork and one end of the downshift fork both have limiting portions. Through the arrangement of this structure, one end of the upshift fork can be limited from detaching from the upshift spiral guide groove, and one end of the downshift fork can be limited from detaching from the downshift spiral guide groove, thereby improving the reliability of the operating mechanism in the present embodiment during use.

[0014] Furthermore, another embodiment of the present invention discloses an operating mechanism of a steel belt type continuously variable transmission, wherein the limiting portion is a first boss formed at the opening of the upshift spiral guide groove and the opening of the downshift spiral guide groove and extending along the edge of the opening, and the limited portion is a second boss formed at one end of the upshift fork and one end of the downshift fork and adapted to the first boss.

[0015] By adopting the above technical solution, in this embodiment, the limiting part is set as the first boss, and the limited part is set as the second boss. Since the boss has the advantage of simple structure, it can be directly integrally formed on the upshift spiral guide groove, the downshift spiral guide groove, the upshift fork, and the downshift fork, which can further simplify the manufacturing process of the operating mechanism and thus reduce the production cost.

[0016] Furthermore, another embodiment of the present invention discloses an operating mechanism of a steel belt type continuously variable transmission, wherein the upshift drive assembly includes an upshift motor and an upshift clutch, and the downshift drive assembly includes a downshift motor and a downshift clutch; the main shaft of the upshift motor is transmission-connected to one end of the rotating shaft through the upshift clutch, and the main shaft of the downshift motor is transmission-connected to the other end of the rotating shaft through the downshift clutch; wherein,

[0017] When the upshift drive assembly is turned on and the downshift drive assembly is turned off, the upshift clutch is engaged, the downshift clutch is turned off, and the upshift motor is linked to the shaft to rotate through the upshift clutch;

[0018] When the upshift drive assembly is disconnected and the downshift drive assembly is turned on, the downshift clutch is engaged, the upshift clutch is disconnected, and the downshift motor is linked to the shaft to rotate through the downshift clutch.

[0019] By adopting the above technical solution, the upshift drive assembly includes an upshift motor and an upshift clutch, and the downshift drive assembly includes a downshift motor and a downshift clutch. Through the arrangement of this structure, when the upshift drive assembly and the downshift drive assembly drive the rotating shaft respectively, the power can be easily connected or disconnected through the clutch, which has the advantages of easy use and high reliability.

[0020] Furthermore, another embodiment of the present invention discloses a control mechanism of a steel belt type continuously variable transmission, wherein the control mechanism further includes an upshift guide member and a downshift guide member; wherein:

[0021] The upshift guide member is detachably fixedly connected to the upshift fork, the downshift guide member is detachably fixedly connected to the downshift fork, and both the upshift guide member and the downshift guide member have a sliding portion connected to the case.

[0022] By adopting the above technical solution, this embodiment can guide the upshift fork and the downshift fork through the arrangement of the upshift guide component and the downshift guide component when they move axially along the rotating shaft, thereby making the upshift fork and the downshift fork move more smoothly along the axial direction of the rotating shaft.

[0023] Furthermore, another embodiment of the present invention discloses an operating mechanism of a steel belt type continuously variable transmission, wherein the upshift spiral guide groove and the downshift spiral guide groove have the same slope relative to the axis of the rotating shaft.

[0024] By adopting the above technical solution, the slopes of the upshift spiral guide groove and the downshift spiral guide groove relative to the axis of the rotating shaft are equal. Through the setting of this structure, the rotation of the upshift spiral guide groove and the downshift spiral guide groove can respectively drive the upshift fork and the downshift fork to move synchronously, thereby making the control accuracy of the operating mechanism in this embodiment more accurate.

[0025] Furthermore, another embodiment of the present invention discloses a steel belt type continuously variable transmission, comprising a housing, a driving wheel set and a driven wheel set, wherein the driving wheel set comprises a main fixed wheel and a main moving wheel, and the driven wheel set comprises a slave fixed wheel and a slave moving wheel; the steel belt type continuously variable transmission also comprises a control mechanism of the above structure; wherein,

[0026] The peripheral walls of the main moving wheel and the peripheral walls of the slave moving wheel are both provided with annular grooves, the other end of the upshift fork is embedded in the annular groove of the main moving wheel, and the other end of the downshift fork is embedded in the annular groove of the slave moving wheel.

[0027] By adopting the above technical solution, the steel belt type continuously variable transmission in this embodiment adopts the operating mechanism of the above structure, and the operating mechanism of the above structure includes a drive assembly, a downshift drive assembly and a rotating shaft assembly, and the rotating shaft assembly includes a rotating shaft, an upshift speed change hub and a downshift speed change hub arranged on the rotating shaft, an upshift fork and a downshift fork. The steel belt type continuously variable transmission adopts the operating structure in this embodiment. During operation, when the upshift drive assembly or the downshift drive assembly drives the rotating shaft to rotate, the rotating shaft can be linked with the upshift speed change hub and the downshift speed change hub to rotate and respectively drive the upshift fork and the downshift fork to move, so that the upshift fork drives the moving wheel in the driving wheel group to approach or move away from the fixed wheel, and the downshift fork drives the moving wheel in the driven wheel group to approach or move away from the fixed wheel to achieve upshift or downshift work. Compared with the hydraulic transmission of the speed ratio adjustment mechanism, it is not only simple in structure, but also has the advantages of low loss and high efficiency. Therefore, the structure of the steel belt type continuously variable transmission in this embodiment can be simplified, the loss can be reduced and the speed change efficiency can be improved.

[0028] Furthermore, another embodiment of the present invention discloses a steel belt type continuously variable transmission, wherein when the operating mechanism further includes an upshift guide member and a downshift guide member, guide grooves extending along the axis of the rotating shaft are formed on the inner wall surface of the case at positions corresponding to the upshift guide member and the downshift guide member respectively, and the sliding portion of the upshift guide member and the sliding portion of the downshift guide member are both slidably connected to the guide grooves.

[0029] The above technical solution is adopted to provide guide grooves on the inner wall surface of the box body to guide the upshift guide member and the downshift guide member, which has the advantage of a simple structure.

[0030] Furthermore, another embodiment of the present invention discloses a steel belt type continuously variable transmission, wherein the connecting line between the axis of the driving wheel set, the axis of the driven wheel set, and the axis of the rotating shaft is a triangle.

[0031] By adopting the above technical solution, the driving wheel group, the driven wheel group and the rotating shaft can be distributed in a triangular shape through the setting of this structure. On the one hand, it can reduce the space occupied by the three, and on the other hand, it can reduce the transmission distance between the driving wheel group and the driven wheel group to improve the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of the operating mechanism of the steel belt type continuously variable transmission provided in Example 1 of the present invention;

[0033] Figure 2 A schematic diagram of the structure of an upshift speed hub in the operating mechanism of a steel belt type continuously variable transmission provided in Example 1 of the present invention;

[0034] Figure 3It is a structural schematic diagram of a steel belt type continuously variable transmission in a deceleration state according to Embodiment 2 of the present invention;

[0035] Figure 4 It is a structural schematic diagram of a steel belt type continuously variable transmission in a speed increasing state according to Embodiment 2 of the present invention;

[0036] Figure 5 This is a layout diagram of the rotating shaft assembly, driving wheel set, and driven wheel set structure in the steel belt type continuously variable transmission of Example 2 of the present invention.

[0037] Description of reference numerals:

[0038] 10: operating mechanism;

[0039] 100: shaft assembly;

[0040] 10A: rotating shaft; 101: upshift speed hub; 102: downshift speed hub; 103: upshift fork; 104: downshift fork; 101B: upshift spiral guide groove; 102B: downshift spiral guide groove;

[0041] 110: upshift drive assembly;

[0042] 111: upshift motor; 112: upshift clutch;

[0043] 120: downshift drive assembly;

[0044] 121: downshift motor; 122: downshift clutch;

[0045] 130: upshift guide member;

[0046] 140: downshift guide member;

[0047] 20: driving wheel set;

[0048] 210: Main fixed wheel;

[0049] 220: main moving wheel;

[0050] 221: Ring groove;

[0051] 30: driven wheel set;

[0052] 310: From fixed wheel;

[0053] 320: from the moving wheel;

[0054] 321: Ring groove;

[0055] 330: Compensation spring. DETAILED DESCRIPTION

[0056] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0057] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0058] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as a limitation on the present invention.

[0059] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0060] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0061] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0062] Embodiment 1:

[0063] One implementation of this embodiment is a steel belt type continuously variable transmission operating mechanism 10, such as Figure 1-Figure 2As shown, it is used to adjust the wheel diameters of the driving wheel set 20 and the driven wheel set 30 of the steel belt type continuously variable transmission.

[0064] Specifically, in the present embodiment, the operating mechanism 10 includes an upshift drive assembly 110, a downshift drive assembly 120 and a rotating shaft assembly 100; the rotating shaft assembly 100 includes a rotating shaft 10A, an upshift shift hub 101 and a downshift shift hub 102 which are sequentially arranged on the rotating shaft 10A along the axial direction of the rotating shaft 10A, and an upshift fork 103 and a downshift fork 104 which are respectively arranged on the upshift shift hub 101 and the downshift shift hub 102.

[0065] More specifically, in the present embodiment, the upshift drive assembly 110 and the downshift drive assembly 120 are respectively connected to the two ends of the rotating shaft 10A in transmission, and an upshift spiral guide groove 101B and a downshift spiral guide groove 102B are formed on the outer peripheral wall of the upshift shift hub 101 and the outer peripheral wall of the downshift shift hub 102. One end of the upshift fork 103 is embedded in the upshift spiral guide groove 101B, and the other end is used for transmission connection with the main moving wheel 220 of the driving wheel group 20. One end of the downshift fork 104 is embedded in the downshift spiral guide groove 102B, and the other end is used for transmission connection with the main moving wheel 220 of the driven wheel group 30.

[0066] More specifically, in the present embodiment, when the upshift drive assembly 110 is turned on and the downshift drive assembly 120 is turned off, the upshift drive assembly 110 drives the rotating shaft 10A to rotate, and the rotating shaft 10A links the upshift speed hub 101 and the downshift speed hub 102 to rotate, so as to respectively drive the upshift fork 103 and the downshift fork 104 to move in the first direction, so that the upshift fork 103 drives the main moving wheel 220 in the driving wheel set 20 to approach the main fixed wheel 210, and the downshift fork 104 drives the slave moving wheel 320 in the driven wheel set 30 away from the slave fixed wheel 310.

[0067] More specifically, in the present embodiment, when the upshift drive assembly 110 is disconnected and the downshift drive assembly 120 is turned on, the downshift drive assembly 120 drives the rotating shaft 10A to rotate, and the rotating shaft 10A links the upshift speed hub 101 and the downshift speed hub 102 to rotate, so as to respectively drive the upshift fork 103 and the downshift fork 104 to move in the second direction, so that the upshift fork 103 drives the main moving wheel 220 in the driving wheel set 20 away from the main fixed wheel 210, and the downshift fork 104 drives the slave moving wheel 320 in the driven wheel set 30 close to the slave fixed wheel 310; the first direction is opposite to the second direction, and the first direction and the second direction are parallel to the axial direction of the rotating shaft 10A.

[0068] More specifically, the operating mechanism 10 in this embodiment includes an upshift drive assembly 110, a downshift drive assembly 120 and a rotating shaft assembly 100, and the rotating shaft assembly 100 includes a rotating shaft 10A, an upshift shift hub 101 and a downshift shift hub 102 arranged on the rotating shaft 10A, an upshift fork 103 and a downshift fork 104. The steel belt type continuously variable transmission uses the control structure in this embodiment. During operation, when the upshift drive assembly 110 or the downshift drive assembly 120 drives the rotating shaft 10A to rotate, the rotating shaft 10A can be linked with the upshift speed change hub 101 and the downshift speed change hub 102 to rotate and respectively drive the upshift fork 103 and the downshift fork 104 to move, so that the upshift fork 103 drives the main moving wheel 220 in the driving wheel group 20 to approach or move away from the main fixed wheel 210, and the downshift fork 104 drives the slave moving wheel 320 in the driven wheel group 30 to approach or move away from the slave fixed wheel 310, so as to achieve upshift or downshift. Compared with the hydraulic transmission of the speed ratio adjustment mechanism. The control mechanism 10 in this embodiment is not only simple in structure, but also has the advantages of low loss and high efficiency.

[0069] More specifically, in this embodiment, the wheel diameter of the driving wheel group 20 and the driven wheel group 30 refers to the distance from the position where the inner wall of the wheel groove formed by the main fixed wheel 210 and the main movable wheel 220, and the slave fixed wheel 310 and the slave movable wheel 320 contacts the steel belt to the axis center.

[0070] In addition, the upshift shift hub 101 and the downshift shift hub 102 can be connected to the rotating shaft 10A through a spline, or can be clamped through a fixing pin, or can be connected through other connection methods commonly used by technicians in this field. The specific setting can be based on actual design and usage requirements, and this embodiment does not limit this.

[0071] Furthermore, another implementation of the present embodiment discloses an operating mechanism 10 of a steel belt type continuously variable transmission, wherein both the opening of the upshift spiral guide groove 101B and the opening of the downshift spiral guide groove 102B have a limiting portion, and both one end of the upshift fork 103 and one end of the downshift fork 104 have a limited portion. When one end of the upshift fork 103 and one end of the downshift fork 104 are respectively embedded in the upshift spiral guide groove 101B and the downshift spiral guide groove 102B, the limiting portion is engaged with the limited portion to limit one end of the upshift fork 103 from disengaging from the upshift spiral guide groove 101B and one end of the downshift fork 104 from disengaging from the downshift spiral guide groove 102B.

[0072] Specifically, the operating mechanism 10 provided in the present embodiment has limiting portions (not shown in the figure) arranged at the openings of the upshift spiral guide groove 101B and the downshift spiral guide groove 102B, and one end of the upshift fork 103 and one end of the downshift fork 104 both have limiting portions (not shown in the figure); such a structural arrangement can limit one end of the upshift fork 103 from being separated from the upshift spiral guide groove 101B and one end of the downshift fork 104 from being separated from the downshift spiral guide groove 102B, thereby improving the reliability of the operating mechanism 10 in the present embodiment during use.

[0073] Furthermore, another implementation of the present embodiment discloses an operating mechanism 10 of a steel belt type continuously variable transmission, wherein the limiting portion is a first boss formed at the opening of the upshift spiral guide groove 101B and the opening of the downshift spiral guide groove 102B and extending along the edge of the opening, and the limited portion is a second boss formed at one end of the upshift fork 103 and one end of the downshift fork 104 and adapted to the first boss.

[0074] Specifically, in this embodiment, the limiting part is set as the first boss, and the limited part is set as the second boss. Since the boss has the advantage of simple structure, it can be directly integrally formed on the upshift spiral guide groove 101B, the downshift spiral guide groove 102B, the upshift fork 103, and the downshift fork 104, which can further simplify the manufacturing process of the operating mechanism 10 and thus reduce the production cost.

[0075] Furthermore, another implementation of the present embodiment discloses an operating mechanism 10 of a steel belt type continuously variable transmission, wherein the upshift drive assembly 110 includes an upshift motor 111 and an upshift clutch 112, and the downshift drive assembly 120 includes a downshift motor 121 and a downshift clutch 122; the main shaft of the upshift motor 111 is transmission-connected to one end of the rotating shaft 10A through the upshift clutch 112, and the main shaft of the downshift motor 121 is transmission-connected to the other end of the rotating shaft 10A through the downshift clutch 122.

[0076] Specifically, during use, when the upshift drive assembly 110 is turned on and the downshift drive assembly 120 is turned off, the upshift clutch 112 is engaged, the downshift clutch 122 is turned off, and the upshift motor 111 is linked to the rotating shaft 10A to rotate through the upshift clutch 112;

[0077] When the upshift drive assembly 110 is disconnected and the downshift drive assembly 120 is turned on, the downshift clutch 122 is engaged, the upshift clutch 112 is disconnected, and the downshift motor 121 is linked to the shaft 10A to rotate through the downshift clutch 122 .

[0078] More specifically, in the present embodiment, the upshift drive assembly 110 includes an upshift motor 111 and an upshift clutch 112, and the downshift drive assembly 120 includes a downshift motor 121 and a downshift clutch 122. Through such a structural arrangement, when the upshift drive assembly 110 and the downshift drive assembly 120 respectively drive the rotating shaft 10A, the power can be conveniently connected or disconnected through the clutch, which has the advantages of easy use and high reliability.

[0079] More specifically, in the present embodiment, the upshift motor 111 and the downshift motor 121 can be set to any one of various motors commonly used by technicians in the field of technology, such as a servo motor, a stepper motor, etc.; the upshift clutch 112 and the downshift clutch 122 can be set to any one of various clutches commonly used by technicians in the field of technology, such as a magnetic powder clutch, a friction clutch, etc.

[0080] Furthermore, another implementation of this embodiment discloses an operating mechanism 10 of a steel belt type continuously variable transmission, and the operating mechanism 10 further includes an upshift guide member 130 and a downshift guide member 140 .

[0081] Specifically, in this embodiment, the upshift guide member 130 is detachably fixedly connected to the upshift fork 103, the downshift guide member 140 is detachably fixedly connected to the downshift fork 104, and both the upshift guide member 130 and the downshift guide member 140 have a sliding portion connected to the case.

[0082] More specifically, in this embodiment, by providing the upshift guide member 130 and the downshift guide member 140, the upshift fork 103 and the downshift fork 104 can be guided by the upshift guide member 130 and the downshift guide member 140 when they move axially along the rotating shaft 10A, thereby making the upshift fork 103 and the downshift fork 104 move more smoothly along the axial direction of the rotating shaft 10A.

[0083] More specifically, in this embodiment, the upshift guide member 130 and the downshift guide member 140 are configured as sliders, which can be specifically seen in Figure 1 and Figure 2 The structure shown.

[0084] Furthermore, another implementation of this embodiment discloses an operating mechanism 10 of a steel belt type continuously variable transmission, wherein the upshift spiral guide groove 101B and the downshift spiral guide groove 102B have the same slope relative to the axis of the rotating shaft 10A.

[0085] Specifically, in the present embodiment, the upshift spiral guide groove 101B and the downshift spiral guide groove 102B have the same slope relative to the axis of the rotating shaft 10A. Through such a structural setting, the upshift spiral guide groove 101B and the downshift spiral guide groove 102B can rotate to respectively drive the upshift fork 103 and the downshift fork 104 to move synchronously, thereby making the control accuracy of the operating mechanism 10 in the present embodiment more accurate.

[0086] More specifically, in the present embodiment, the lengths of the upshift spiral guide groove 101B and the downshift spiral guide groove 102B on the axis of the rotating shaft 10A should be set according to the displacement amounts of the driving wheel set 20 and the driven wheel set 30 .

[0087] For example, the displacement of the driving wheel set 20 is X, and the length of the upshift spiral guide groove 101B on the axis of the rotating shaft 10A is Y. Figure 2 As shown, in the operating mechanism 10 provided in this embodiment, X should be equal to Y. Similarly, the length of the downshift spiral guide groove 102B on the axis of the rotating shaft 10A is similar to that of the upshift spiral guide groove 101B, which will not be described in detail in this embodiment.

[0088] Embodiment 2:

[0089] One implementation of this embodiment discloses a steel belt type continuously variable transmission, such as Figure 3-Figure 5 As shown, it includes a box body (not shown in the figure), a driving wheel group 20 and a driven wheel group 30, the driving wheel group 20 includes a main fixed wheel 210 and a main moving wheel 220, and the driven wheel group 30 includes a slave fixed wheel 310 and a slave moving wheel 320; the steel belt type continuously variable transmission also includes the operating mechanism 10 in the embodiment.

[0090] Specifically, in this embodiment, the peripheral walls of the main moving wheel 220 and the peripheral walls of the slave moving wheel 320 both have annular grooves 221 / 321, the other end of the upshift fork 103 is embedded in the annular groove 221 of the main moving wheel 220, and the other end of the downshift fork 104 is embedded in the annular groove 321 of the slave moving wheel 320.

[0091] More specifically, the steel belt type continuously variable transmission in this embodiment adopts the operating mechanism 10 of the above structure. The operating mechanism 10 of the above structure includes a drive assembly, a downshift drive assembly 120 and a rotating shaft assembly 100. The rotating shaft assembly 100 includes a rotating shaft 10A, an upshift speed hub 101 and a downshift speed hub 102 arranged on the rotating shaft 10A, an upshift fork 103 and a downshift fork 104. The steel belt type continuously variable transmission uses the control structure in this embodiment. During operation, when the upshift drive assembly 110 or the downshift drive assembly 120 drives the rotating shaft 10A to rotate, the rotating shaft 10A can be linked with the upshift speed change hub 101 and the downshift speed change hub 102 to rotate and respectively drive the upshift fork 103 and the downshift fork 104 to move, so that the upshift fork 103 drives the moving wheel in the driving wheel group 20 to approach or move away from the fixed wheel, and the downshift fork 104 drives the moving wheel in the driven wheel group 30 to approach or move away from the fixed wheel to achieve upshift or downshift work. Compared with the hydraulic transmission of the speed ratio adjustment mechanism, it not only has a simple structure, but also has the advantages of low loss and high efficiency. Therefore, the structure of the steel belt type continuously variable transmission in this embodiment can be simplified, the loss can be reduced, and the speed change efficiency can be improved.

[0092] Furthermore, another implementation of the present embodiment discloses a steel belt type continuously variable transmission, wherein the operating mechanism 10 further includes an upshift guide member 130 and a downshift guide member 140, and guide grooves (not shown in the figure) extending along the axis of the rotating shaft 10A are formed on the inner wall surface of the case at positions corresponding to the upshift guide member 130 and the downshift guide member 140, respectively, and the sliding portions of the upshift guide member 130 and the downshift guide member 140 are both slidably connected to the guide grooves.

[0093] Specifically, in this embodiment, guide grooves are provided on the inner wall surface of the case to guide the upshift guide member 130 and the downshift guide member 140 , which has the advantage of a simple structure.

[0094] Furthermore, another implementation of this embodiment discloses a steel belt type continuously variable transmission, wherein the connecting line between the axis of the driving wheel set 20, the axis of the driven wheel set 30, and the axis of the rotating shaft 10A is a triangle.

[0095] Specifically, in this embodiment, this structural setting allows the driving wheel set 20, the driven wheel set 30, and the rotating shaft 10A to be distributed in a triangle, which can reduce the space occupied by the three on the one hand, and reduce the transmission distance between the driving wheel set 20 and the driven wheel set 30 on the other hand, so as to improve the transmission efficiency.

[0096] More specifically, a is the distance from the axis of the rotating shaft 10A to the axis of the driving wheel set 20 , b is the distance from the axis of the rotating shaft 10A to the axis of the driven wheel set 30 , and c is the distance from the axis of the driving wheel set 20 to the axis of the driven wheel set 30 .

[0097] like Figure 5 As shown,

[0098] Furthermore, the driven wheel group 30 also includes a compensation spring 330, which is arranged on one side of the slave moving wheel 320. When the slave moving wheel 320 cannot completely compress the steel belt, the compensation spring 330 compresses the slave moving wheel 320, so that the slave moving wheel 320 and the slave fixed wheel 310 compress the steel belt.

[0099] The operating mechanism 10 of the steel belt type continuously variable transmission provided in this embodiment is used during operation. Figure 3-Figure 4 As shown:

[0100] When speed is required, the upshift motor 111 is started, the upshift clutch 112 is engaged, and the downshift clutch 122 is disconnected. At this time, the main shaft of the upshift motor 111 rotates forward, driving the rotating shaft 10A to rotate clockwise (as viewed from the left), thereby driving the upshift speed hub 101 and the downshift speed hub 102 to rotate clockwise. The upshift speed hub 101, due to the action of the upshift spiral guide groove 101B, causes the upshift fork 103 to move rightward relative to the upshift speed hub 101 and the downshift speed hub 102 to rotate clockwise. The speed hub 102, due to the action of the downshift spiral guide groove 102B, causes the downshift fork 104 to move rightward relative to the upshift speed hub 101, so that the upshift fork 103 drives the main moving wheel 220 in the driving wheel set 20 to approach the main fixed wheel 210, and the downshift fork 104 drives the slave moving wheel 320 in the driven wheel set 30 away from the slave fixed wheel 310, and finally increases the wheel diameter of the driving wheel set 20 and reduces the wheel diameter of the driven wheel set 30 to achieve speed increase, that is, by Figure 3 to Figure 4 status.

[0101] When deceleration is required, the downshift motor 121 is started, the downshift clutch 122 is engaged, and the upshift clutch 112 is disconnected. At this time, the main shaft of the downshift motor 121 rotates forward, driving the rotating shaft 10A to rotate counterclockwise (as viewed from the left), thereby driving the upshift speed hub 101 and the downshift speed hub 102 to rotate counterclockwise. The upshift speed hub 101, due to the action of the upshift spiral guide groove 101B, causes the upshift fork 103 to move leftward relative to the upshift speed hub 101, and the downshift speed hub 102 moves leftward relative to the upshift speed hub 101. The speed hub 102, due to the action of the downshift spiral guide groove 102B, causes the downshift fork 104 to move leftward relative to the upshift speed hub 101, so that the upshift fork 103 drives the main moving wheel 220 in the driving wheel set 20 away from the main fixed wheel 210, and the downshift fork 104 drives the slave moving wheel 320 in the driven wheel set 30 close to the slave fixed wheel 310, and finally reduces the wheel diameter of the driving wheel set 20 and increases the wheel diameter of the driven wheel set 30, so as to achieve deceleration, that is, by Figure 4 to Figure 3 status.

[0102] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A control mechanism of a steel belt type continuously variable transmission, used for adjusting the wheel diameters of a driving wheel set and a driven wheel set of the steel belt type continuously variable transmission; characterized in that: The operating mechanism includes an upshift drive assembly, a downshift drive assembly and a rotating shaft assembly; the rotating shaft assembly includes a rotating shaft, an upshift speed change hub and a downshift speed change hub sequentially arranged on the rotating shaft along the axial direction of the rotating shaft, and an upshift fork and a downshift fork respectively arranged on the upshift speed change hub and the downshift speed change hub; wherein, The upshift drive assembly and the downshift drive assembly are respectively connected to the two ends of the rotating shaft, and an upshift spiral guide groove and a downshift spiral guide groove are formed on the outer peripheral wall of the upshift speed change hub and the outer peripheral wall of the downshift speed change hub. One end of the upshift fork is embedded in the upshift spiral guide groove, and the other end is used for transmission connection with the main moving wheel of the driving wheel group. One end of the downshift fork is embedded in the downshift spiral guide groove, and the other end is used for transmission connection with the main moving wheel of the driven wheel group; wherein, When the upshift drive assembly is turned on and the downshift drive assembly is turned off, the upshift drive assembly drives the rotating shaft to rotate, and the rotating shaft links the upshift speed change hub and the downshift speed change hub to rotate, so as to respectively drive the upshift fork and the downshift fork to move in a first direction, so that the upshift fork drives the main moving wheel in the driving wheel set to approach the main fixed wheel, and the downshift fork drives the slave moving wheel in the driven wheel set to move away from the slave fixed wheel; When the upshift drive assembly is disconnected and the downshift drive assembly is turned on, the downshift drive assembly drives the rotating shaft to rotate, and the rotating shaft links the upshift speed change hub and the downshift speed change hub to rotate, so as to respectively drive the upshift fork and the downshift fork to move in the second direction, so that the upshift fork drives the main moving wheel in the driving wheel group away from the main fixed wheel, and the downshift fork drives the slave moving wheel in the driven wheel group close to the slave fixed wheel; The first direction is opposite to the second direction, and the first direction and the second direction are parallel to the axial direction of the rotating shaft.

2. The operating mechanism of the steel belt type continuously variable transmission as claimed in claim 1, characterized in that: The openings of the upshift spiral guide groove and the openings of the downshift spiral guide groove are both provided with limiting portions, and one end of the upshift fork and one end of the downshift fork are both provided with limited portions. When one end of the upshift fork and one end of the downshift fork are respectively embedded in the upshift spiral guide groove and the downshift spiral guide groove, the limiting portions are engaged with the limited portions to limit one end of the upshift fork from being separated from the upshift spiral guide groove and one end of the downshift fork from being separated from the downshift spiral guide groove.

3. The operating mechanism of the steel belt type continuously variable transmission according to claim 2, characterized in that: The limiting portion is a first boss formed at the opening of the upshift spiral guide groove and the opening of the downshift spiral guide groove and extending along the edge of the opening, and the limited portion is a second boss formed at one end of the upshift fork and one end of the downshift fork and adapted to the first boss.

4. The operating mechanism of a steel belt type continuously variable transmission according to any one of claims 1 to 3, characterized in that: The upshift drive assembly includes an upshift motor and an upshift clutch, and the downshift drive assembly includes a downshift motor and a downshift clutch; the main shaft of the upshift motor is connected to one end of the rotating shaft through the upshift clutch, and the main shaft of the downshift motor is connected to the other end of the rotating shaft through the downshift clutch; wherein, When the upshift drive assembly is turned on and the downshift drive assembly is turned off, the upshift clutch is engaged, the downshift clutch is turned off, and the upshift motor is linked to the shaft to rotate through the upshift clutch; When the upshift drive assembly is disconnected and the downshift drive assembly is turned on, the downshift clutch is engaged, the upshift clutch is disconnected, and the downshift motor is linked to the shaft to rotate through the downshift clutch.

5. The operating mechanism of the steel belt type continuously variable transmission according to claim 4, characterized in that: The operating mechanism further includes an upshift guide component and a downshift guide component; wherein, The upshift guide member is detachably fixedly connected to the upshift fork, the downshift guide member is detachably fixedly connected to the downshift fork, and both the upshift guide member and the downshift guide member have a sliding portion connected to the case.

6. The operating mechanism of the steel belt type continuously variable transmission according to claim 4, characterized in that: The upshift helical guide groove and the downshift helical guide groove have the same slope relative to the axis of the rotation shaft.

7. A steel belt type continuously variable transmission, comprising a housing, a driving wheel set and a driven wheel set, wherein the driving wheel set comprises a main fixed wheel and a main moving wheel, and the driven wheel set comprises a slave fixed wheel and a slave moving wheel; characterized in that: The steel belt type continuously variable transmission further comprises the operating mechanism according to any one of claims 1 to 6; wherein: The peripheral walls of the main moving wheel and the peripheral walls of the slave moving wheel are both provided with annular grooves, the other end of the upshift fork is embedded in the annular groove of the main moving wheel, and the other end of the downshift fork is embedded in the annular groove of the slave moving wheel.

8. The steel belt type continuously variable transmission according to claim 7, characterized in that: When the operating mechanism further includes an upshift guide member and a downshift guide member, guide grooves extending along the axis of the rotating shaft are formed on the inner wall surface of the box body at positions corresponding to the upshift guide member and the downshift guide member respectively, and the sliding portion of the upshift guide member and the sliding portion of the downshift guide member are both slidably connected to the guide grooves.

9. The steel belt type continuously variable transmission according to claim 7 or 8, characterized in that: The connecting line between the axis center of the driving wheel set, the axis center of the driven wheel set and the axis center of the rotating shaft is a triangle.

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