CVT (continuously variable transmission) with deceleration braking function

Abstract

The utility model relates to the technical field of transmissions, in particular to a CVT (continuously variable transmission) with a deceleration brake function, which comprises a primary assembly, the primary assembly is provided with a driving shaft, and a driving fixed disc component and a driving movable disc component are sleeved on the driving shaft. An isolator and bearings are installed on the driving shaft and located between the driving fixed disc assembly and the driving movable disc assembly, the two bearings are located on the two sides of the isolator, the bearings and the isolator are sleeved with a transmission belt, and the other end of the transmission belt is connected with a secondary assembly. According to the utility model, after the accelerator of the vehicle is released and the vehicle is decelerated and braked, the wheels can be decelerated and braked through the anti-dragging force of the engine, so that the dependence, the abrasion and the driving jerking feeling on a braking system are reduced, the oil consumption is reduced, and the durability and the reliability of the CVT gearbox and the operation performance of the vehicle are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a CVT transmission with deceleration braking. Background Art

[0002] CVT is a continuously variable transmission that achieves continuously variable speed by changing the radius ratio of the driving gear and the driven gear. Compared with the traditional stepped transmission, CVT has no clear gear position and can achieve continuous change of transmission ratio, thereby obtaining the best match between the transmission system and the engine operating conditions.

[0003] CVT has no fixed gears, and the gear shifting is very smooth, without the gear shifting shock of traditional automatic transmissions. At the same time, CVT can automatically adjust to the most economical transmission ratio according to driving conditions, which helps improve fuel efficiency. Since the CVT transmission achieves stepless speed regulation by changing the meshing ratio between the transmission cone wheels, the speed regulation process has lag. When an emergency situation requires rapid braking, the CVT belt and cone wheel will slip, causing serious wear of the belt and cone wheel, and increasing the braking distance of the vehicle.

[0004] Therefore, those skilled in the art are committed to developing a CVT transmission with deceleration braking, which can quickly brake the engine when the vehicle decelerates and improve the vehicle's operating performance. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a CVT transmission with deceleration braking, which can quickly brake the engine when the vehicle decelerates, thereby improving the operating performance of the vehicle.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A CVT transmission with deceleration braking comprises a primary assembly, wherein the primary assembly has a driving shaft, an active fixed disk assembly and an active movable disk assembly are sleeved on the driving shaft, a one-way device and a bearing are installed on the driving shaft and between the active fixed disk assembly and the active movable disk assembly, two bearings are located on both sides of the one-way device, a transmission belt is sleeved on the bearings and the one-way device, and the other end of the transmission belt is connected to a secondary assembly.

[0008] The beneficial effects of adopting the above scheme are as follows: the output end of the engine is connected to the driving shaft and drives the driving shaft to rotate, the rotation of the driving shaft drives the active fixed disk assembly and the active movable disk assembly to rotate, the transmission belt clamped between the active fixed disk assembly and the active movable disk assembly follows the rotation and drives the secondary assembly to rotate, when the vehicle brakes and decelerates, the secondary assembly and the transmission belt decelerate, because a one-way device is installed between the transmission belt and the driving shaft, and there is a speed difference between the transmission belt and the driving shaft, the transmission belt will give the driving shaft a deceleration brake, the deceleration brake of the driving shaft drives the engine to decelerate and brake, thereby reducing the braking distance and improving the vehicle's operating performance.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the one-way device includes a rotating ring, and a plurality of one-way parts are connected to the inner side of the rotating ring. The plurality of one-way parts are evenly arranged circumferentially and abut against the driving shaft. The length direction of the one-way parts and the radial direction of the driving shaft have a braking angle.

[0011] The beneficial effect of adopting the above further scheme is that the end of the one-way piece is beveled against the driving shaft, so that there is no braking effect when the driving shaft and the one-way piece rotate in the same direction, and there is braking force between the driving shaft and the one-way piece when they rotate in different directions, thereby slowing it down.

[0012] Furthermore, the braking angle is 1° to 45°.

[0013] The beneficial effect of adopting the above further solution is that the larger the braking angle, the better the braking performance, which can be adjusted according to actual needs.

[0014] Furthermore, the cross section of the transmission belt is trapezoidal.

[0015] The beneficial effect of adopting the above further solution is that the cross section of the transmission belt is trapezoidal, which is conducive to the active fixed disk and the active movable disk to clamp and transmit power.

[0016] Furthermore, the active fixed disk assembly includes an active fixed disk, and the active fixed disk is connected to the active shaft.

[0017] The beneficial effect of adopting the above further solution is that the active fixing disc is used to clamp the transmission belt.

[0018] Furthermore, the active moving disk assembly includes an active moving disk and a ramp plate, and the active moving disk and the ramp plate are both sleeved on the outside of the active shaft. The rotation of the active shaft drives the active moving disk and the ramp plate to rotate. The ramp plate has an inclined abutment surface, and the active moving disk has an abutment cavity. A puli bead is arranged between the abutment surface and the abutment cavity.

[0019] The beneficial effect of adopting the above further solution is that when the speed of the driving shaft increases, the centrifugal force on the puli beads increases, pushing the active moving disk to move along the axis of the driving shaft, reducing the distance between the active moving disk and the active fixed disk.

[0020] Furthermore, a return spring seat is sleeved on the active shaft, and a return spring is arranged between the return spring seat and the active moving disk.

[0021] The beneficial effect of adopting the above further solution is that when the speed of the active shaft decreases, the centrifugal force on the puli beads decreases, and the reset spring pushes the active moving disk to move along the axis of the active shaft, increasing the distance between the active moving disk and the active fixed disk.

[0022] Further, the secondary assembly includes a driven shaft, the driven shaft is sleeved with a driven fixed disk and a driven movable disk, the driven fixed disk has an inclined first clamping surface, the driven movable disk has an inclined second clamping surface, and the distance between the first clamping surface and the second clamping surface close to the driven shaft is greater than the distance between the first clamping surface and the second clamping surface away from the driven shaft;

[0023] The transmission belt is clamped between the first clamping surface and the second clamping surface.

[0024] The beneficial effect of adopting the above further solution is that the first clamping surface and the second clamping surface clamp the transmission belt, which is beneficial to transmitting the power of the driving shaft to the secondary assembly.

[0025] Furthermore, a spring support seat is installed at the end of the driven shaft, and an abutment spring is arranged between the spring support seat and the driven movable disk.

[0026] The beneficial effect of adopting the above further solution is that the abutment spring pushes the driven movable disk to move along the axis direction of the driven shaft.

[0027] Furthermore, the driven shaft is a hollow shaft, and a spline for connecting with the output shaft is arranged inside the driven shaft.

[0028] The beneficial effect of adopting the above further solution is that the spline facilitates the connection between the driven shaft and the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a CVT transmission with deceleration braking in a specific embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the primary assembly structure of a specific embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the secondary assembly structure of a specific embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of a isolator according to a specific embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the planar structure of a isolator according to a specific embodiment of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 100, primary assembly; 200, secondary assembly; 300, transmission belt

[0036] 101, active shaft; 110, active fixed disk assembly; 111, active fixed disk; 120, active moving disk assembly; 121, active moving disk; 122, ramp plate; 123, abutment surface; 124, abutment cavity; 125, puli bead; 126, return spring seat; 127, return spring; 130, check valve; 131, rotating ring; 132, check piece; 140, bearing;

[0037] 201, driven shaft; 202, driven fixed disk; 203, driven movable disk; 204, first clamping surface; 205, second clamping surface; 206, spring support seat; 207, abutting spring; 208, spline. DETAILED DESCRIPTION

[0038] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0039] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element 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.

[0040] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a CVT transmission with deceleration braking includes a primary assembly 100, the primary assembly 100 has a driving shaft 101, an active fixed disk assembly 110 and an active movable disk assembly 120 are sleeved on the driving shaft 101, a isolator 130 and a bearing 140 are installed on the driving shaft 101 and located between the active fixed disk assembly 110 and the active movable disk assembly 120, two bearings 140 are located on both sides of the isolator 130, a transmission belt 300 is arranged outside the bearings 140 and the isolator 130, and the other end of the transmission belt 300 is connected to the secondary assembly 200.

[0043] In the present invention, the output end of the engine is connected to the driving shaft 101 and drives the driving shaft 101 to rotate. The rotation of the driving shaft 101 drives the active fixed disk assembly 110 and the active movable disk assembly 120 to rotate. The transmission belt 300 clamped between the active fixed disk assembly 110 and the active movable disk assembly 120 follows the rotation and drives the secondary assembly 200 to rotate. When the vehicle brakes and decelerates, the secondary assembly 200 and the transmission belt 300 decelerate. Since a one-way device 130 is installed between the transmission belt 300 and the driving shaft 101, and there is a speed difference between the transmission belt 300 and the driving shaft 101, the transmission belt 300 will give the driving shaft 101 a deceleration brake, and the deceleration brake of the driving shaft 101 drives the engine to decelerate and brake, thereby reducing the braking distance and improving the vehicle's operating performance.

[0044] like Figure 2 , Figure 4 and Figure 5As shown, in some embodiments, the isolator 130 includes a rotating ring 131, and an intermediate sleeve is further provided between the bearing 140, the rotating ring 131 and the transmission belt 300. The rotating ring 131 is in the shape of a hollow circular ring, and a plurality of one-way pieces 132 are connected to the inner side of the rotating ring 131. In this embodiment, the one-way pieces 132 are rectangular, and the plurality of one-way pieces 132 are evenly arranged in a circumference and abut against the driving shaft 101. The one-way pieces 132 have a braking angle A in the length direction and in the radial direction of the driving shaft 101, and the braking angle A is 1° to 45°. The larger the angle, the better the braking effect. However, the better the braking effect, the higher the strength requirement for the driving shaft 101. In a specific embodiment, the braking angle A is 1° to 3°.

[0045] The cross section of the transmission belt 300 is trapezoidal, which is beneficial for the active fixed disk assembly 110 and the active movable disk assembly 120 to clamp the transmission belt 300 and transmit power.

[0046] The active fixed disk assembly 110 includes an active fixed disk 111 , and the active fixed disk 111 is fixedly connected to the active shaft 101 .

[0047] like Figure 1 , Figure 2 As shown, in another embodiment, the active moving disk assembly 120 includes an active moving disk 121 and a ramp plate 122, and the active moving disk 121 and the ramp plate 122 are both sleeved on the outside of the active shaft 101. The rotation of the active shaft 101 drives the active moving disk 121 and the ramp plate 122 to rotate. The ramp plate 122 has an inclined abutment surface 123, and the active moving disk 121 has an abutment cavity 124. A puli bead 125 is arranged between the abutment surface 123 and the abutment cavity 124. When the speed of the active shaft 101 increases, the centrifugal force on the puli bead 125 increases, which pushes the active moving disk 121 to move along the axial direction of the active shaft 101, thereby reducing the distance between the active moving disk 121 and the active fixed disk 111, thereby increasing the meshing ratio.

[0048] In order to facilitate the deceleration of the active shaft 101 and increase the meshing ratio, a return spring seat 126 is also provided on the active shaft 101, and a return spring 127 is also provided between the return spring seat 126 and the active moving disk 121. When the speed of the active shaft 101 decreases, the centrifugal force on the puli bead 125 is reduced, and the return spring 127 pushes the active moving disk 121 to move along the axial direction of the active shaft 101, thereby increasing the distance between the active moving disk 121 and the active fixed disk 111.

[0049] like Figure 1 , Figure 3As shown, in some embodiments, the secondary assembly 200 includes a driven shaft 201, on which a driven fixed disk 202 and a driven movable disk 203 are sleeved, the driven fixed disk 202 has an inclined first clamping surface 204, the driven movable disk 203 has an inclined second clamping surface 205, and the transmission belt 300 is clamped between the first clamping surface 204 and the second clamping surface 205. The inclination angles of the first clamping surface 204 and the second clamping surface 205 are consistent with the inclination angles of the sides of the transmission belt 300, which is conducive to the first clamping surface 204 and the second clamping surface 205 clamping the transmission belt 300. The distance between the first clamping surface 204 and the second clamping surface 205 close to the driven shaft 201 is greater than the distance between the first clamping surface 204 and the second clamping surface 205 far from the driven shaft 201, which facilitates the transmission belt 300 to adaptively adjust its position between the first clamping surface 204 and the second clamping surface 205.

[0050] A spring support seat 206 is installed at the end of the driven shaft 201, and an abutment spring 207 is arranged between the spring support seat 206 and the driven moving disk 203. When the rotation radius of the transmission belt 300 changes in the secondary assembly 200, the abutment spring 207 enables the driven moving disk 203 to move up and down adaptively. The driven shaft 201 is a hollow shaft, and a spline 208 for connecting with the output shaft is arranged inside the driven shaft 201. The spline 208 facilitates the connection between the driven shaft 201 and the output shaft to drive the vehicle to move.

[0051] The working principle of the utility model is as follows: the rotation of the engine drives the driving shaft 101 to rotate, the rotation of the driving shaft 101 drives the active fixed disk 111 and the active movable disk 121 to rotate, and drives the transmission belt 300 clamped between the active fixed disk 111 and the active movable disk 121 to rotate, and the other end of the transmission belt 300 is clamped between the driven fixed disk 202 and the driven movable disk 203 and drives the driven fixed disk 202, the driven movable disk 203 and the driven shaft 201 to rotate;

[0052] When the engine speed increases, the centrifugal force on the puli bead 125 increases, pushing the active moving disk 121 to move along the axial direction of the active shaft 101, reducing the distance between the active moving disk 121 and the active fixed disk 111. Since the transmission belt 300 on the primary assembly 100 side becomes shorter and the transmission belt 300 on the secondary assembly 200 end becomes longer, the transmission diameter of the transmission belt 300 becomes larger, and the contact spring 207 pushes the driven moving disk 203 to move, so that the distance between the driven moving disk 203 and the driven fixed disk 202 becomes smaller, increasing the meshing ratio;

[0053] When the vehicle decelerates and brakes, causing the rotation speed of the driven shaft 201 to decrease, the secondary assembly 200 and the transmission belt 300 decelerate. Since a one-way device 130 is installed between the transmission belt 300 and the driving shaft 101, and there is a speed difference between the transmission belt 300 and the driving shaft 101, the transmission belt 300 will apply deceleration braking to the driving shaft 101. The deceleration braking of the driving shaft 101 drives the engine to decelerate and brake, and increases the distance between the driven movable disk 203 and the driven fixed disk 202, and increases the distance between the active movable disk 121 and the active fixed disk 111.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A CVT transmission with deceleration braking, characterized in that: The invention comprises a primary assembly (100), wherein the primary assembly (100) has a driving shaft (101), an active fixed disk assembly (110) and an active movable disk assembly (120) are sleeved on the driving shaft (101), a check valve (130) and a bearing (140) are installed on the driving shaft (101) and between the active fixed disk assembly (110) and the active movable disk assembly (120), two bearings (140) are located on both sides of the check valve (130), a transmission belt (300) is sleeved on the bearings (140) and the check valve (130), and the other end of the transmission belt (300) is connected to the secondary assembly (200).

2. The CVT transmission with deceleration brake according to claim 1, characterized in that: The one-way device (130) comprises a rotating ring (131), a plurality of one-way pieces (132) are connected to the inner side of the rotating ring (131), the plurality of one-way pieces (132) are evenly arranged in a circumference and abut against the driving shaft (101), and a braking angle is formed between the length direction of the one-way piece (132) and the radial direction of the driving shaft (101).

3. The CVT transmission with deceleration brake according to claim 2, characterized in that: The braking angle is 1° to 45°.

4. The CVT transmission with deceleration brake according to claim 1, characterized in that: The transmission belt (300) has a trapezoidal cross section.

5. The CVT transmission with deceleration brake according to claim 1, characterized in that: The active fixed disk assembly (110) comprises an active fixed disk (111), and the active fixed disk (111) is connected to the active shaft (101).

6. The CVT transmission with deceleration brake according to claim 1, characterized in that: The active moving disk assembly (120) comprises an active moving disk (121) and a ramp plate (122). The active moving disk (121) and the ramp plate (122) are both sleeved on the outside of the active shaft (101). The active shaft (101) rotates to drive the active moving disk (121) and the ramp plate (122) to rotate. The ramp plate (122) has an inclined abutment surface (123). The active moving disk (121) has an abutment cavity (124). A puli bead (125) is provided between the abutment surface (123) and the abutment cavity (124).

7. The CVT transmission with deceleration brake according to claim 6, characterized in that: A return spring seat (126) is also sleeved on the active shaft (101), and a return spring (127) is also provided between the return spring seat (126) and the active moving disk (121).

8. The CVT transmission with deceleration brake according to claim 1, characterized in that: The secondary assembly (200) comprises a driven shaft (201), a driven fixed disk (202) and a driven movable disk (203) being sleeved on the driven shaft (201), the driven fixed disk (202) having an inclined first clamping surface (204), the driven movable disk (203) having an inclined second clamping surface (205), and the distance between the first clamping surface (204) and the second clamping surface (205) close to the driven shaft (201) being greater than the distance between the first clamping surface (204) and the second clamping surface (205) far from the driven shaft (201); The transmission belt (300) is clamped between the first clamping surface (204) and the second clamping surface (205).

9. The CVT transmission with deceleration brake according to claim 8, characterized in that: A spring support seat (206) is installed at the end of the driven shaft (201), and an abutment spring (207) is provided between the spring support seat (206) and the driven movable disk (203).

10. The CVT transmission with deceleration brake according to claim 8, characterized in that: The driven shaft (201) is a hollow shaft, and a spline (208) for connecting to an output shaft is provided inside the driven shaft (201).

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