Rolling ball ramp structure, electric control brake and vehicle

Abstract

The utility model discloses a rolling ball ramp structure, an electric control brake and a vehicle. The rolling ball ramp structure comprises a plurality of rolling balls, each rolling ball ramp comprises two guide ball grooves, the two guide ball grooves are formed in the opposite faces of the two ball discs respectively, and the two ball discs can rotate relatively in the circumferential direction so that the rolling balls can roll in the circumferential direction of the ball discs and drive the two ramp components to move relatively in the axial direction of the two ramp components; a guide line of the guide ball groove is provided with an upslope section and a downslope section, the upslope section spirally ascends relative to the opposite ball disc from the starting point to the end point, the downslope section spirally descends relative to the opposite ball disc from the starting point to the end point, and the end point of the upslope section is connected with the starting point of the downslope section. The preset guiding track is limited to be provided with the uphill section and the downhill section which are opposite in inclination direction, and after the electric control brake brakes the vehicle, self-locking is achieved through resistance of the downhill section, so that the electric control brake can enable the braked vehicle to be kept in a parking state without an additional parking mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of braking devices, and particularly to a ball ramp structure and an electro-mechanical brake.

[0002] The utility model also relates to the technical field of vehicles, and particularly to a vehicle. Background Art

[0003] The existing electro-mechanical brake mainly includes a rotary drive mechanism, a ball ramp structure and a thrust mechanism. A rotary force is generated by a rotary drive mechanism such as a motor. The rotary displacement of the rotary drive mechanism is converted into a linear displacement by the ball ramp structure and transmitted to the thrust mechanism. Then, the caliper is pushed by the thrust mechanism to clamp the brake disc to generate a braking force, thereby realizing braking.

[0004] However, for the existing electro-mechanical brake, the guide rail of the ball ramp structure is usually designed to be spiral, and the angle of rotation of the ball in the rotary displacement direction is proportional to the height of the ball climbing in the linear displacement direction. When the electro-mechanical brake brakes the vehicle by rotating the rotary drive mechanism forward, a parking mechanism is required to limit the reverse rotation of the rotary drive mechanism to keep the vehicle in a parked state. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ball ramp structure, an electro-mechanical brake and a vehicle, so as to solve the technical problem that the existing electro-mechanical brake must rely on an additional parking mechanism to keep the braked vehicle in a parked state.

[0006] The above purpose of the utility model can be achieved by the following technical solutions:

[0007] The utility model provides a ball ramp structure, including: a plurality of balls; a plurality of ball ramps, each of the ball ramps includes two guiding ball grooves which are respectively arranged on the opposite surfaces of two ball discs, and the plurality of balls are limited between the two guiding ball grooves of the plurality of ball ramps. The two ball discs can rotate relative to each other in the circumferential direction so that the balls can roll in the circumferential direction of the ball discs and drive the two ramp components to move relative to each other in the axial direction; wherein, the guiding ball groove has a guiding line arranged along a preset track of the ball, the guiding line has an uphill section and a downhill section, the uphill section spirally rises relative to the opposite ball disc from its starting point to its ending point, the downhill section spirally descends relative to the opposite ball disc from its starting point to its ending point, and the ending point of the uphill section is connected to the starting point of the downhill section.

[0008] In an embodiment of the utility model, the height of the spiral descent of the downhill section is less than the height of the spiral ascent of the uphill section.

[0009] In an embodiment of the present utility model, the slope of the downhill section is less than the slope of the uphill section.

[0010] In an embodiment of the present utility model, the end point of the uphill section is smoothly and transitionally connected to the starting point of the downhill section.

[0011] In an embodiment of the present utility model, the guiding ball groove further includes a rear limiting section connected to the end point of the downhill section. The rear limiting section spirally ascends relative to the opposite ball disc from its starting point to its end point, and the slope of the rear limiting section is greater than the slope of the uphill section.

[0012] In an embodiment of the present utility model, the end point of the downhill section is connected to the rear limiting section through a rear arc section.

[0013] In an embodiment of the present utility model, the radius of the rear arc section is equal to the radius of the rolling ball.

[0014] In an embodiment of the present utility model, the guiding ball groove further includes a front limiting section connected to the starting point of the uphill section. The front limiting section spirally descends relative to the opposite ball disc from its starting point to its end point, and the slope of the front limiting section is greater than the slope of the uphill section.

[0015] In an embodiment of the present utility model, the end point of the front limiting section is connected to the starting point of the uphill section through a front arc section.

[0016] In an embodiment of the present utility model, the radius of the front arc section is equal to the radius of the rolling ball.

[0017] In an embodiment of the present utility model, the uphill section includes a front uphill section and a rear uphill section. The end point of the front uphill section is connected to the starting point of the rear uphill section, and the end point of the rear uphill section is connected to the starting point of the downhill section. The slope of the front uphill section is greater than the slope of the rear uphill section.

[0018] In an embodiment of the present utility model, one ball disc is provided at one end of the thrust mechanism of the electric brake, a caliper is connected to the other end of the thrust mechanism, the other ball disc is the rotation driving mechanism of the electric brake, and the height of the spiral ascent of the front uphill section is equal to the initial distance between the caliper and the brake disc.

[0019] In an embodiment of the present utility model, the slope of the rear uphill section is set to be constant from its starting point to its end point; or the rear uphill section is segmented front and back from its starting point to its end point, and the slope of the latter section is less than the slope of the former section; or the slope of the rear uphill section is set to gradually decrease from its starting point to its end point.

[0020] In an embodiment of the present utility model, the end point of the front uphill section is smoothly and transitionally connected to the starting point of the rear uphill section.

[0021] The present utility model also provides an electric brake, which includes the above-mentioned rolling ball ramp structure.

[0022] The present utility model also provides a vehicle, which includes the above-mentioned electric brake.

[0023] The features and advantages of the present utility model are as follows:

[0024] In the rolling ball ramp structure of the present utility model, by defining that the guiding ball groove has an uphill section with a spiral upward trend and a downhill section with a spiral downward trend, when the rolling ball rolls from the starting point of the uphill section to the end point of the uphill section, it can drive the two ball discs to move away from each other axially relative to each other. Then, the rolling ball can continue to roll from the end point of the uphill section to the downhill section, thereby using the resistance of the downhill section to achieve self-locking and preventing the rolling ball from rolling back to the uphill section and causing the two ball discs to approach each other axially relative to each other.

[0025] For the electric brake and vehicle of the present utility model, after the electric brake uses the uphill section of the rolling ball ramp structure of the present utility model to brake the vehicle, it uses the resistance of the downhill section to achieve self-locking, so that the electric brake can keep the braked vehicle in a parked state without setting an additional parking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the rolling ball ramp structure in the present utility model.

[0028] Figure 2 It is a cross-sectional view of the rolling ball ramp structure in the present utility model.

[0029] Figure 3 It is a schematic structural diagram of the first guiding ball groove in the present utility model.

[0030] Figure 4 It is a schematic structural diagram of the second guiding ball groove in the present utility model.

[0031] Figure 5 It is a schematic diagram of the position of the rolling ball in the initial state in the present utility model.

[0032] Figure 6 It is a schematic diagram of the position of the rolling ball during the braking process in the present utility model.

[0033] Figure 7 This is a schematic diagram of the position of the rolling ball in the parking state in the present utility model.

[0034] Figure 8 This is a schematic structural diagram of the preset guiding track in the present utility model.

[0035] In the figure:

[0036] 1. Guiding line; 1'. Guiding line; 11. Front limiting section; 11'. Front limiting section; 12. Front arc section; 13. Uphill section; 131. Front uphill section; 132. Rear uphill section; 14. Downhill section; 15. Rear arc section; 16. Rear limiting section

[0037] 2. Rolling ball

[0038] 3. Rolling ball ramp; 31. Guiding ball groove; 311. Starting point of the guiding ball groove; 312. End point of the guiding ball groove

[0039] 4. First ball tray

[0040] 5. Second ball tray Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0042] Embodiment 1

[0043] As Figures 1 to 4 shown, the present utility model provides a rolling ball ramp structure, including: a plurality of rolling balls 2; a plurality of rolling ball ramps 3, the rolling ball ramps 3 include two guiding ball grooves 31, the two guiding ball grooves 31 are respectively arranged on two ball trays, and the plurality of rolling balls 2 are limited between the two guiding ball grooves 31 of the plurality of rolling ball ramps 3, and the two ball trays can rotate relative to each other in the circumferential direction so that the rolling balls 2 can roll in the circumferential direction of the ball trays and drive the two ball trays to move relative to each other in the axial direction.

[0044] It should be noted that the relative rotation of the two ball trays in the circumferential direction and the relative movement of the two ball trays in the axial direction include at least the following three situations: First, one ball tray is fixed and does not move, and the other ball tray rotates in the circumferential direction and moves axially at the same time; Second, one ball tray is fixed axially and can only rotate in the circumferential direction, and the other ball tray is fixed in the circumferential direction and can only move axially; Third, both ball trays can rotate in the circumferential direction and the rotation directions are opposite, and at the same time one ball tray or both ball trays move axially.

[0045] In the present invention, for the convenience of description, the two ball trays are respectively defined as a first ball tray 4 and a second ball tray 5 , that is, one guiding ball groove 31 is provided on the first ball tray 4 , and the other guiding ball groove 31 is provided on the second ball tray 5 .

[0046] like Figures 1 to 4 As shown, in one embodiment of the present invention, the first ball disc 4 can be arranged to rotate circumferentially, and its rotation direction is defined as X; the second ball disc 5 can be arranged to move axially, and its movement direction is defined as Y. The rotational motion of the first ball disc 4 along the rotational direction X is converted into the linear motion of the second ball disc 5 along the movement direction Y through the rolling ball ramp 3 structure. Among them, the rotational direction X includes opposite rotational advance direction X1 and rotational retreat direction X2; the movement direction Y includes opposite forward direction Y1 and backward direction Y2. When the first ball disk 4 rotates relative to the second ball disk 5 in the rotation direction X1, the ball 2 rolls from the starting point 311 to the end point 312 in the guide ball groove 31 of the first ball disk 4 and the guide ball groove 31 of the second ball disk 5, thereby driving the second ball disk 5 to move in the forward direction Y1; when the second ball disk 5 moves in the backward direction Y2, the ball 2 rolls from the end point 312 to the starting point 311 in the guide ball groove 31 of the first ball disk 4 and the guide ball groove 31 of the second ball disk 5, thereby driving the first ball disk 4 to rotate relative to the second ball disk 5 in the rotation direction X2.

[0047] Among them, combined Figures 5 to 7 As shown, the guide ball groove 31 has a guide line 1 arranged along the preset trajectory of the rolling ball 2. The trajectory that the rolling ball 2 can form during the rolling process is limited by the shape of the guide lines 1 of the two guide ball grooves 31. The guide lines 1 of the two guide ball grooves 31 have the same shape, but are arranged in opposite directions in the rotation direction X. As in the above embodiment, the guide line 1 of the guide ball groove 31 on the first ball disc 4 extends from its starting point to its end point along the rotation direction X1, and the guide line 1 of the guide ball groove 31 on the second ball disc 5 extends from its starting point to its end point along the rotation direction X2.

[0048] Therefore, combined with Figures 5 to 7 As shown, the utility model limits the trajectory of the rolling ball 2 between the two guide ball grooves 31 by limiting the shape of the guide line 1. In the implementation mode of the utility model, the guide line 1 has an uphill section 13 and a downhill section 14. The uphill section 13 spirally rises from its starting point to its end point relative to the opposite ball disc, that is, it extends in the circumferential direction while being inclined toward the direction of the opposite ball disc. The downhill section 14 spirally descends from its starting point to its end point relative to the opposite ball disc, that is, it extends in the circumferential direction while being inclined toward the direction away from the opposite ball disc. The end point of the uphill section 13 is connected to the starting point of the downhill section 14.

[0049] like Figures 5 to 7As shown in the figure, for the rolling ball ramp structure of the present utility model, by defining that the guiding line 1 has a spirally ascending uphill section 13 and a spirally descending downhill section 14, when the rolling ball 2 rolls from the starting point of the uphill section 13 to the end point of the uphill section 13, it can push the two ball disks to move away from each other axially relative to each other. Then, the rolling ball 2 can continue to roll from the end point of the uphill section 13 to the downhill section 14, thereby achieving self-locking by using the resistance of the downhill section 14 and preventing the rolling ball 2 from retreating to the uphill section 13 and causing the two ball disks to approach each other axially relative to each other.

[0050] Combined with Figures 1 to 4 As shown in the figure, the rolling ball ramp structure of the present utility model is particularly suitable for application in an electric brake. The first ball disk 4 is arranged on the rotary drive mechanism of the electric brake, and the second ball disk 5 is arranged on the thrust mechanism of the electric brake, thereby converting the rotary motion of the rotary drive mechanism into the linear motion of the thrust mechanism through the rolling ball ramp structure. When the electric brake brakes the vehicle, self-locking is achieved by using the resistance of the downhill section 14, so that the electric brake can maintain the braking state without setting an additional parking mechanism, thereby keeping the braked vehicle in a parked state.

[0051] Specifically, the rotary drive mechanism includes a rotary motor, a reduction gear, and the first ball disk 4. The first ball disk 4 has a gear surface meshing with the reduction gear. The rotary motion of the rotary motor is transmitted to the first ball disk 4 after being reduced by the reduction gear. One end of the thrust mechanism close to the rotary drive mechanism is provided with the second ball disk 5, and the second ball disk 5 is arranged opposite to the first ball disk 4 in the moving direction Y. The end face of the first ball disk 4 facing the second ball disk 51 is provided with a plurality of guiding ball grooves 31, and the end face of the second ball disk 51 facing the first ball disk 4 is correspondingly provided with a plurality of guiding ball grooves 31, thereby cooperating to form a plurality of rolling ball ramps 3. The more specific structure of the electric brake is the same as that of the prior art and will not be elaborated here.

[0052] Combined with Figure 1 、 Figure 2 And Figures 5 to 7 As shown in the figure, one end of the thrust mechanism far from the rotary drive mechanism is connected to the caliper through a piston. When the first ball disk 4 rotates along the advancing direction X1, causing the rolling ball 2 to roll from the starting point of the uphill section 13 to the end point of the uphill section 13, it can drive the second ball disk 5 to move along the advancing direction Y1 and push the caliper to apply a braking force to the brake disc, switching the electric brake from the starting state to the braking state. Then, when the rolling ball 2 rolls to the downhill section 14, self-locking can be achieved by using the resistance of the downhill section 14 to keep the electric brake in the braking state. When the piston presses the thrust mechanism along the retreating direction Y2, the rolling ball 2 can overcome the resistance of the downhill section 14 and roll to the uphill section 13, and then roll from the end point of the uphill section 13 to the starting point of the uphill section 13, and push the first ball disk 4 to rotate along the retreating direction X2, so that the piston can pull the caliper to separate from the brake disc, and the electric brake releases the brake and returns to the starting state.

[0053] Of course, the rolling ball ramp structure of the present utility model can also be applied to other fields, and the above-mentioned beneficial effects can also be achieved.

[0054] Combined with Figure 7 and Figure 8 As shown, since the rolling ball 2 will cause the thrust mechanism to retreat a certain distance along the backward direction Y2 when rolling along the downhill section 14, in order to avoid the excessive retreat distance of the thrust mechanism, resulting in a reduction in braking force and the inability to maintain the effectiveness of the braking state, in the implementation manner of the present utility model, the height of the spiral descent of the downhill section 14 is less than the height of the spiral ascent of the uphill section 13. Among them, the height of the spiral ascent of the uphill section 13 is equal to the distance that the thrust mechanism moves along the forward direction Y1, and the height of the spiral descent of the downhill section 14 is equal to the distance that the thrust mechanism moves along the backward direction Y2. Therefore, the distance that the rolling ball 2 drives the thrust mechanism to move along the forward direction Y1 when rolling along the uphill section 13 is greater than the distance that the thrust mechanism can move along the backward direction Y2 when the rolling ball 2 rolls along the downhill section 14, so that after the rolling ball 2 rolls along the downhill section 14 to the end of the downhill section 14, the thrust mechanism can still provide a large thrust, so that there is a large braking force between the caliper and the brake disc, thereby maintaining an effective braking state.

[0055] Among them, the height of the spiral descent of the downhill section 14 and the height of the spiral ascent of the uphill section 13 can be set according to the braking requirements without specific limitation. In some specific embodiments of the present utility model, the height of the spiral ascent of the uphill section 13 is greater than the deformation amount required for the caliper to generate the maximum clamping force, so as to ensure that the rolling ball 2 can push the thrust mechanism under the guidance of the uphill section 13 to make the caliper generate the required maximum clamping force. The height of the spiral descent of the downhill section 14 is preferably less than 10% of the height of the spiral ascent of the uphill section 13.

[0056] Furthermore, combined with Figure 7 and Figure 8 As shown, in order to avoid excessive resistance in the downhill section 14, resulting in difficulty in pushing the rolling ball 2 to roll along the retracting direction X2 through the downhill section 14 when the piston presses the thrust mechanism along the backward direction Y2 to release the braking state, in the implementation manner of the present utility model, the slope of the downhill section 14 is less than the slope of the uphill section 13, that is, the inclination angle of the downhill section 14 is less than the inclination angle of the uphill section 13. Among them, the slope of the downhill section 14 and the slope of the uphill section 13 can be set according to the braking requirements without specific limitation. In some specific embodiments of the present utility model, the inclination angle of the uphill section 13 is greater than the equivalent friction angle, preferably 2° to 10°; the inclination angle of the downhill section 14 is preferably 0.6° to 1°.

[0057] In addition, as Figure 8 shown, in order to improve the continuity between the uphill section 13 and the downhill section 14, in the implementation manner of the present utility model, the end of the uphill section 13 and the start of the downhill section 14 are smoothly transitionally connected.

[0058] As Figure 8 shown, in order to prevent the rolling ball 2 from rolling past the end of the downhill section 14 and rolling out of the guiding ball groove 31, in the embodiment of the present utility model, the guiding wire 1 further includes a rear limiting section 16 connected to the end of the downhill section 14. The rear limiting section 16 spirally ascends relative to the opposite ball tray from its starting point to its ending point, and the slope of the rear limiting section 16 is greater than the slope of the uphill section 13, such that the rolling ball 2 must roll past the end of the rear limiting section 16 before it can roll out of the guiding ball groove 31. Since the rotational torque required for the rolling ball 2 to roll along the rear limiting section 16 is greater than the rotational torque required for the rolling ball 2 to roll along the uphill section 13, the rear limiting section 16 is utilized to achieve soft limiting rather than hard impact. On the one hand, it can prevent the rolling ball 2 from rolling past the rear limiting section 16 and rolling out of the guiding ball groove 31, and on the other hand, it can prevent the rolling ball 2 from directly impacting the inner wall surface of the guiding ball groove 31 at the end and generating noise.

[0059] In addition, as Figure 8 shown, in order to enable the rolling ball 2 to stably stay at the end of the downhill section 14 and maintain a stable braking state, in the embodiment of the present utility model, the end of the downhill section 14 is connected to the rear limiting section 16 through a rear arc section 15. Specifically, the rear limiting section 16 extends along the tangent direction at the end of the rear arc section 15, thereby ensuring the continuity between the rear arc section 15 and the rear limiting section 16, and preventing the rolling ball 2 from generating noise during the process of rolling from the rear arc section 15 to the rear limiting section 16. Preferably, the radius of the rear arc section 15 is equal to the radius of the rolling ball 2.

[0060] As Figure 8 shown, in order to prevent the rolling ball 2 from rolling past the starting point of the uphill section 13 and rolling out of the guiding ball groove 31, in the embodiment of the present utility model, the guiding wire 1 further includes a front limiting section 11 connected to the starting point of the uphill section 13. The front limiting section 11 spirally descends relative to the opposite ball tray from its starting point to its ending point, and the slope of the front limiting section 11 is greater than the slope of the uphill section 13, such that the rolling ball 2 must roll past the starting point of the front limiting section 11 before it can roll out of the guiding ball groove 31. Since the rotational torque required for the rolling ball 2 to roll along the front limiting section 11 is greater than the rotational torque required for the rolling ball 2 to roll along the uphill section 13, the rear limiting section 16 is utilized to achieve soft limiting rather than hard impact. On the one hand, it can prevent the rolling ball 2 from rolling past the front limiting section 11 and rolling out of the guiding ball groove 31, and on the other hand, it can prevent the rolling ball 2 from directly impacting the inner wall surface of the guiding ball groove 31 at the starting point and generating noise.

[0061] In addition, as Figure 8As shown, in order to enable the rolling ball 2 to stably stay at the starting point of the uphill section 13 and maintain a stable braking release state, in the embodiment of the present utility model, the end point of the front limiting section 11 is connected to the starting point of the uphill section 13 through the front arc section 12. Specifically, the front limiting section 11 extends along the tangent direction at the starting point of the front arc section 12, and the uphill section 13 extends along the tangent direction at the end point of the front arc section 12, so as to ensure the continuity between the front arc section 12, the front limiting section 11 and the uphill section 13, and prevent the rolling ball 2 from generating noise when rolling between the front limiting section 11, the front arc section 12 and the uphill section 13. Preferably, the radius of the front arc section 12 is equal to the radius of the rolling ball 2.

[0062] Combined with Figure 3 , Figure 4 and Figure 8 As shown, in an embodiment of the present utility model, a plurality of rolling ball ramps 3 are connected end to end, and the end point of the rear limiting section 16 of the guiding line 1 of a guiding ball groove 31 is smoothly and transitionally connected to the starting point of the front limiting section 11' of the guiding line 1' of an adjacent guiding ball groove 31. Specifically, the number of the rolling ball ramps 3 is preferably more than three. In this embodiment, the number of the rolling ball ramps 3 is three; the first ball tray 4 rotates 120 degrees along the advancing direction X1, and the rolling ball 2 rolls from the starting point of the inner wall surface of the guiding groove to the end point of the inner wall surface of the guiding groove; the first ball tray 6 rotates 120 degrees along the retracting direction X2, and the rolling ball 2 rolls from the end point of the inner wall surface of the guiding groove to the starting point of the inner wall surface of the guiding groove.

[0063] In another embodiment of the present utility model, a plurality of rolling ball ramps 3 are arranged at intervals in the rotational direction X without being connected.

[0064] Such as Figure 8 As shown, in the embodiment of the present utility model, the uphill section 13 includes a front uphill section 131 and a rear uphill section 132. The end point of the front uphill section 131 is connected to the starting point of the rear uphill section 132, and the end point of the rear uphill section 132 is connected to the starting point of the downhill section 14. The slope of the front uphill section 131 is greater than that of the rear uphill section 132, that is, the gradient of the front uphill section 131 is greater than that of the rear uphill section 132. By setting the front uphill section 131 with a larger gradient and the rear uphill section 132 with a smaller gradient, the front uphill section 131 is used to improve the braking response speed, and the rear uphill section 132 requires a relatively smaller rotational torque provided by the rotational drive mechanism, which is beneficial to optimizing the performance requirements of the rotational drive mechanism.

[0065] Specifically, the height of the spiral ascent of the front uphill section 131 is equal to the initial distance between the caliper and the brake disc. First, the front uphill section 131 is used to guide the rolling ball 2 to drive the thrust mechanism to move rapidly along the forward direction Y1 to eliminate the gap between the caliper and the brake disc. Then, the rear limiting section 16 is used to continue guiding the rolling ball 2 to drive the thrust mechanism to move relatively slowly along the forward direction Y1 to gradually increase the thrust until the required braking state is achieved between the caliper and the brake disc. In addition, to improve the continuity of the uphill section 13, the end point of the front uphill section 131 is smoothly and transitionally connected to the starting point of the rear uphill section 132.

[0066] Among them, the slope of the front uphill section 131 may not be specifically limited and can be set according to requirements. For example, the faster the required braking response speed, the greater the slope of the front uphill section 131, and vice versa. The slope of the rear uphill section 132 may also not be specifically limited and can be set according to requirements. For example, the faster the required braking speed, the greater the slope of the rear uphill section 132, and vice versa. The height that the rear uphill section 132 climbs in the forward direction Y1 is not specifically limited and can be set according to requirements. If a greater braking force is required, the height that the rear uphill section 132 climbs in the forward direction Y1 is greater, and vice versa. To ensure a relatively fast braking response speed, the angle occupied by the front uphill section 131 in the rotational direction X should be as small as possible, such as 5° to 15°, preferably 10°. The rear uphill section 132 should have as large an angle as possible in the rotational direction X, such as 75° to 85°, preferably 80°. Moreover, the cumulative spiral ascent height of the rear uphill section 132 should be greater than the deformation amount required for the caliper to generate the maximum clamping force to ensure that the rolling ball 2 can drive the thrust mechanism to generate the required maximum clamping force under the guidance of the rear uphill section 132. In addition, the inclination angle of the front uphill section 131 is preferably 5° to 10°; the inclination angle of the rear uphill section 132 is preferably 2° to 4°.

[0067] As Figure 8 shown, in some embodiments of the present invention, the slope of the rear uphill section 132 is set constantly from its starting point to its ending point. However, to further optimize the performance requirements of the rotational drive mechanism, in other embodiments of the present invention, the rear uphill section 132 is divided into front and rear segments from its starting point to its ending point, and the slope of the latter segment is less than that of the former segment; or the slope of the rear uphill section 132 is set to gradually decrease from its starting point to its ending point.

[0068] Embodiment 2

[0069] The present invention also provides an electric brake, including a rolling ball ramp structure. The specific structure, working principle, and beneficial effects of the rolling ball ramp structure in this embodiment are the same as those in Embodiment 1 and will not be elaborated here.

[0070] Embodiment 3

[0071] The present utility model further provides a vehicle, including an electronic brake controller. In this embodiment, the specific structure, working principle and beneficial effects of the electronic brake controller are the same as those of the electronic brake controller in Embodiment 2, and will not be described herein again.

[0072] The above are only several embodiments of the present utility model. Those skilled in the art can make various changes or modifications to the embodiments of the present utility model without departing from the spirit and scope of the present utility model based on the content disclosed in the application documents.

Claims

1. A rolling ball ramp structure, characterized in that: include: Multiple bowling balls; A plurality of ball rolling ramps, wherein the ball rolling ramps include two guide ball grooves, the two guide ball grooves are respectively arranged on opposite surfaces of two ball discs, and the plurality of balls are limited between the two guide ball grooves of the plurality of ball rolling ramps, and the two ball discs can rotate relative to each other in the circumferential direction so that the balls can roll in the circumferential direction of the ball discs and drive the two ball discs to move relative to each other in the axial direction thereof; Among them, the guide ball groove has a guide line set along the preset trajectory of the rolling ball, and the guide line has an uphill section and a downhill section. The uphill section spirally rises from its starting point to its end point relative to the opposite ball disk, and the downhill section spirally descends from its starting point to its end point relative to the opposite ball disk, and the end point of the uphill section is connected to the starting point of the downhill section.

2. The ball rolling ramp structure according to claim 1, characterized in that: The height of the spiral descent of the downhill section is less than the height of the spiral ascent of the uphill section.

3. The ball rolling ramp structure according to claim 1, characterized in that: The slope of the downhill section is smaller than the slope of the uphill section.

4. The ball rolling ramp structure according to claim 1, characterized in that: The end point of the uphill section is connected to the starting point of the downhill section in a smooth transition.

5. The ball rolling ramp structure according to any one of claims 1 to 4, characterized in that: The guide line also includes a rear limit section connected to the end point of the downhill section, the rear limit section spirally rises from its starting point to the end point relative to the opposite ball disc, and the slope of the rear limit section is greater than the slope of the uphill section.

6. The ball rolling ramp structure according to claim 5, characterized in that: The end point of the downhill section is connected to the rear limit section through a rear arc section.

7. The ball rolling ramp structure according to claim 6, characterized in that: The radius of the rear arc segment is equal to the radius of the rolling ball.

8. The ball rolling ramp structure according to claim 5, characterized in that: The guide line also includes a front limit section connected to the starting point of the uphill section, the front limit section spirally descends from its starting point to its end point relative to the opposite ball disc, and the slope of the front limit section is greater than the slope of the uphill section.

9. The ball rolling ramp structure according to claim 8, characterized in that: The end point of the front limit section is connected to the starting point of the uphill section through the front arc section.

10. The ball rolling ramp structure according to claim 9, characterized in that: The radius of the front arc segment is equal to the radius of the rolling ball.

11. The ball rolling ramp structure according to any one of claims 1 to 4, characterized in that: The uphill section includes a front uphill section and a rear uphill section, the end point of the front uphill section is connected to the starting point of the rear uphill section, the end point of the rear uphill section is connected to the starting point of the downhill section, and the slope of the front uphill section is greater than the slope of the rear uphill section.

12. The ball rolling ramp structure according to claim 11, characterized in that: One of the ball discs is arranged at one end of the thrust mechanism of the electric control brake, the other end of the thrust mechanism is connected to a caliper, and the other ball disc is the rotation driving mechanism of the electric control brake. The height of the spiral rise of the front uphill section is equal to the initial spacing between the caliper and the brake disc.

13. The ball rolling ramp structure according to claim 11, characterized in that: The slope of the rear uphill section is set constant from its starting point to its end point; or The rear uphill section is arranged in sections from its starting point to its end point, and the slope of the rear section is smaller than the slope of the front section; or The slope of the rear uphill section is set to gradually decrease from its starting point to its end point.

14. The ball rolling ramp structure according to claim 11, characterized in that: The end point of the front uphill section is connected to the starting point of the rear uphill section in a smooth transition.

15. An electronically controlled brake, characterized in that: It comprises a rolling ball ramp structure as claimed in any one of claims 1 to 14.

16. A vehicle, characterized in that: Comprising the electronically controlled brake as claimed in claim 15.

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