Electromagnetic type whole vehicle braking device

Abstract

The utility model provides an electromagnetic type whole vehicle braking device which comprises a brake disc, a first ball disc and a second ball disc, the brake disc is coaxially and fixedly sleeved outside a rotating shaft, and the first ball disc and the second ball disc are coaxially sleeved outside the rotating shaft and are respectively arranged on two sides of the brake disc. The first ball disc is embedded into the first bracket and can axially move relative to the first bracket, and the second ball disc is embedded into the second bracket and can axially move relative to the second bracket; an annular mounting groove is coaxially formed in the outer side of the first ball disc, a coil is arranged in the mounting groove, a first spring is arranged between the first ball disc and the brake disc, and a second spring is arranged between the second ball disc and the brake disc; when the coil is powered on, the first ball disc and the second ball disc generate magnetic force to get close to each other, attract and press the brake disc and prevent the brake disc and the rotating shaft from rotating. When the coil loses power, the brake disc and the rotating shaft are allowed to rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile braking, in particular to an electromagnetic whole vehicle braking device. Background Art

[0002] Under the development trend of "electrification and intelligence" of automobiles, traditional mechanical brakes have gradually been replaced by wire-controlled brakes. The current wire-controlled brake products have relatively complex structures, high corresponding costs, and long response times, all above 150ms.

[0003] Among the EHB (Electronic Hydraulic Brake) products currently on the market, the OneBox brake system is the most popular. As the most integrated product, it integrates electronic power assist function with ESC (Electronic Stability Control), TCS (Traction Control System) and many other functions. In short, it can complete four-wheel independent control, braking force distribution, EPB (Electrical Parking Brake) and other module interactions (engine, etc.).

[0004] First, the current One Box needs to use brake fluid to build pressure. The production and use of brake fluid will cause consumption during the life of the vehicle, and the brake fluid needs to be replaced regularly for each vehicle, otherwise it will affect the braking strength;

[0005] Second, the One Box product has a huge number of parts, including solenoid valves, valve bodies, pedal simulators, motors, roller screws or plunger pumps, master cylinder cup pistons, ECU controllers, coils, and other parts, which greatly adjust the product cost; third, the assembly line in the production process is also bound to be very complicated, and the investment in the production line is very large;

[0006] However, parameters such as response speed and pressure are still difficult to optimize to the extreme, which poses great challenges to the assembly and cost of the OEMs.

[0007] EMB (Electronic Mechanical Brake System) is a solution to replace hydraulic brakes in the past two years. It eliminates the use of brake fluid and directly releases the power end to the wheel end. It can also achieve four-wheel independent control and other functions.

[0008] First, EMB currently requires a large number of motors, one for each brake wheel end, and the motor currently accounts for a large proportion of the cost in the braking system, resulting in EMB having no cost advantage. In addition, EMB wheel-end machinery requires the use of many transmission components such as gears and ball screws, and the overall transmission efficiency is low, which poses a great challenge to the power of the motor.

[0009] Secondly, when the EMB currently executes special working conditions such as ABS (Anti-lock Braking System), it can only self-lock due to the large number of transmission mechanisms, and the motor needs to reverse back and forth. The starting current of the motor is huge in a short period of time, exceeding the rated current by a large amount, which makes the motor control algorithm very difficult.

[0010] Third, EMB has the same production problems as One Box, with complex assembly processes, large production line investments, and high costs. Utility Model Content

[0011] The embodiment of the utility model provides an electromagnetic vehicle brake device, which optimizes the brake structure, generates braking force by electromagnetically controlling the ball disc to attract the brake disc through the coil, eliminates high-cost components such as motors and transmission mechanisms, reduces costs, simplifies control strategies, and improves response time.

[0012] An electromagnetic vehicle brake device provided by an embodiment of the utility model includes a brake disc, a first ball disc and a second ball disc, wherein the brake disc is coaxially sleeved and fixed outside a rotating shaft, the first ball disc and the second ball disc are coaxially sleeved outside the rotating shaft and are respectively arranged on both sides of the brake disc; the first ball disc is embedded in a first bracket and can move axially relative to the first bracket, and the second ball disc is embedded in a second bracket and can move axially relative to the second bracket; the first bracket and the second bracket are respectively arranged on both sides of the brake disc to connect to a vehicle body; the first ball disc An annular mounting groove is coaxially arranged on the outer side of the disc, a coil is arranged in the mounting groove, a first spring is arranged between the first ball disc and the brake disc, and a second spring is arranged between the second ball disc and the brake disc; when the coil is energized, the first ball disc and the second ball disc generate magnetic force to approach each other, and attract and press the brake disc to prevent the brake disc and the rotating shaft from rotating; when the coil is de-energized, the first ball disc and the second ball disc leave the brake disc under the elastic force of the first spring and the second spring respectively, allowing the brake disc and the rotating shaft to rotate.

[0013] Preferably, the inner walls of the first bracket and the second bracket are both axially provided with positioning ribs, and the outer walls of the first ball disc and the second ball disc are both provided with positioning grooves matching the positioning ribs, and when the first ball disc is embedded in the first bracket, the positioning groove and the positioning ribs are installed correspondingly to prevent the first ball disc from rotating relative to the first bracket; when the second ball disc is embedded in the second bracket, the positioning groove and the positioning ribs are installed correspondingly to prevent the second ball disc from rotating relative to the second bracket.

[0014] Preferably, the first ball disc and the second ball disc each include an inner ring, balls and an outer ring, and the balls are arranged between the coaxially arranged inner ring and outer ring to separate the inner ring and the outer ring and allow the inner ring and the outer ring to rotate relative to each other.

[0015] Preferably, the inner rings of the first ball disc and the second ball disc rotate synchronously with the rotating shaft and the brake disc.

[0016] Preferably, the first spring is arranged between the inner ring of the first ball disc and the brake disc; the second spring is arranged between the inner ring of the second ball disc and the brake disc.

[0017] Preferably, when the first ball disc moves axially relative to the first bracket, the inner ring, balls and outer ring of the first ball disc move axially synchronously; when the second ball disc moves axially relative to the second ball disc, the inner ring, balls and outer ring of the second ball disc move axially synchronously.

[0018] Preferably, a first spring groove is provided on the side of the brake disc close to the first ball disc, one end of the first spring is provided in the first spring groove, and the other end abuts against the first ball disc; a second spring groove is provided on the side of the brake disc close to the second ball disc, one end of the second spring is provided in the second spring groove, and the other end abuts against the second ball disc; the first spring and the second spring are always in a compressed state.

[0019] Preferably, the installation groove is filled with sealant, and when the coil is installed in the installation groove, the sealant fills the gap between the coil and the installation groove.

[0020] Preferably, when the coil loses power, the inter-disc gaps between the first ball disc, the second ball disc and the brake disc are both 1 mm-1.5 mm.

[0021] Preferably, the outer circumferences of the first bracket and the second bracket are both provided with fixing ears, the fixing ears are provided with fixing holes, and the first bracket and the second bracket are both connected to the vehicle body by screws passing through the fixing holes.

[0022] Compared with the prior art, the technical solution of the embodiment of the utility model has beneficial effects.

[0023] For example, the electromagnetic vehicle braking device provided by the utility model includes a brake disc, a first ball disc and a second ball disc, the brake disc is coaxially sleeved and fixed outside the rotating shaft, the first ball disc and the second ball disc are coaxially sleeved outside the rotating shaft and are respectively arranged on both sides of the brake disc; an annular mounting groove is coaxially arranged on the outer side of the first ball disc, a coil is arranged in the mounting groove, a first spring is arranged between the first ball disc and the brake disc, and a second spring is arranged between the second ball disc and the brake disc; when the coil is energized, the first ball disc and the second ball disc generate magnetic force to approach each other, attract and press the brake disc, and prevent the brake disc and the rotating shaft from rotating; when the coil loses power, the first ball disc and the second ball disc leave the brake disc respectively under the elastic force of the first spring and the second spring, allowing the brake disc and the rotating shaft to rotate; the coil is energized, the electromagnetically controlled ball disc attracts the brake disc to generate braking force, and high-cost components such as motors and transmission mechanisms are eliminated, thereby reducing costs, simplifying control strategies, and improving response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the electromagnetic vehicle brake device of the utility model;

[0025] Figure 2 It is a side view of the electromagnetic vehicle brake device of the utility model.

[0026] Description of reference numerals:

[0027] 1-brake disc; 2-first bracket; 3-coil; 4-first spring; 5-second spring; 6-second ball disc; 7-first ball disc; 8-second bracket; 9-rotating shaft; 10-positioning rib; 11-positioning groove; 12-inner ring; 13-ball; 14-outer ring; 15, fixing ear. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0029] Reference Figure 1 and Figure 2 , an embodiment of the utility model provides an electromagnetic vehicle braking device.

[0030] Specifically, the electromagnetic vehicle brake device provided by the embodiment of the utility model includes a brake disc 1, a first ball disc 7 and a second ball disc 6. The brake disc 1 is coaxially sleeved and fixed outside the rotating shaft 9, and the first ball disc 7 and the second ball disc 6 are coaxially sleeved outside the rotating shaft 9 and are respectively arranged on both sides of the brake disc 1; the first ball disc 7 is embedded in the first bracket 2 and can be axially moved relative to the first bracket 2, and the second ball disc 6 is embedded in the second bracket 8 and can be axially moved relative to the second bracket 8; the first bracket 2 and the second bracket 8 are respectively arranged on both sides of the brake disc 1 to connect the vehicle body; the outer side of the first ball disc 7 is coaxially arranged An annular mounting groove is provided, in which a coil 3 is arranged, a first spring 4 is arranged between the first ball disc 7 and the brake disc 1, and a second spring 5 is arranged between the second ball disc 6 and the brake disc 1; when the coil 3 is energized, the first ball disc 7 and the second ball disc 6 generate magnetic force to move closer to each other, and attract and press the brake disc 1 to prevent the brake disc 1 and the rotating shaft 9 from rotating, and the braking force can be adjusted by adjusting the current size or the duty cycle of the coil 3; when the coil 3 loses power, the first ball disc 7 and the second ball disc 6 leave the brake disc 1 under the elastic force of the first spring 4 and the second spring 5 respectively, allowing the brake disc 1 and the rotating shaft 9 to rotate.

[0031] The electromagnetic vehicle braking device provided in the embodiment of the utility model generates braking force by electromagnetically controlling the coil 3 to attract the ball disc, eliminates high-cost components such as motors and transmission mechanisms, can reduce costs, simplify control strategies, increase work efficiency, and improve response time.

[0032] Compared with the One Box product, the electromagnetic braking method eliminates the hydraulic circuit, and there is no need to worry about the brake fluid absorbing water and aging, which will affect the braking strength during the life cycle of the vehicle; the structure is simple, does not require too many parts to support, the product cost is low, and high-value products such as motors and screws are not required; the assembly is simple, and only two ball discs and brackets need to be assembled, which greatly reduces the process difficulty and investment cost of the production line.

[0033] Compared with EMB products, the electromagnetic braking method eliminates the motor and transmission mechanism, reduces costs, and does not have a complex transmission mechanism that consumes efficiency, greatly improving the response time. Currently, the electromagnetic braking can release within 10ms and clamp within 50ms. The suction force can be controlled by controlling the duty cycle of coil 3. There is no complex motor control algorithm. There is no need to face the risk of high current shock in a short period of time under ABS conditions.

[0034] In some embodiments, the inner walls of the first bracket 2 and the second bracket 8 are both axially provided with positioning ribs 10, and the outer walls of the first ball disc 7 and the second ball disc 6 are both provided with positioning grooves 11 matching the positioning ribs 10. When the first ball disc 7 is embedded in the first bracket 2, the positioning groove 11 is installed corresponding to the positioning rib 10 (for example, the positioning rib 10 of the first bracket 2 is embedded in the positioning groove 11 of the first ball disc 7), preventing the first ball disc 7 from rotating axially relative to the first bracket 2; when the second ball disc 6 is embedded in the second bracket 8, the positioning groove 11 is installed corresponding to the positioning rib 10 (for example, the positioning rib 10 of the second bracket 8 is embedded in the positioning groove 11 of the second ball disc 6), preventing the second ball disc 6 from rotating axially relative to the second bracket 8.

[0035] In a specific embodiment, the inner walls of the first bracket 2 and the second bracket 8 are respectively provided with multiple groups of positioning ribs 10, the outer wall of the first ball disc 7 is provided with positioning grooves 11 having the same number as the positioning ribs 10 on the inner wall of the first bracket 2, and the outer wall of the second ball disc 6 is provided with positioning grooves 11 having the same number as the positioning ribs 10 on the inner wall of the second bracket 8, and the multiple groups of positioning ribs 10 on the first bracket 2 and the multiple groups of positioning ribs 10 on the second bracket 8 are respectively symmetrically arranged along the axial direction.

[0036] In a specific implementation, the bracket and the ball disc may also be connected in other ways, not limited to screws, pin holes, etc., as long as the ball disc is allowed to move axially relative to the bracket and prevented from rotating relative to the bracket.

[0037] In some embodiments, the first ball disc 7 and the second ball disc 6 both include an inner ring 12, balls 13 and an outer ring 14, and the balls 13 are arranged between the coaxially arranged inner ring 12 and outer ring 14 to separate the inner ring 12 and the outer ring 14 and allow the inner ring 12 and the outer ring 14 to rotate relative to each other.

[0038] In some embodiments, the inner rings 12 of the first ball disc 7 and the second ball disc 6 rotate synchronously with the rotating shaft 9 and the brake disc 1 .

[0039] In some embodiments, the first spring 4 is disposed between the inner ring 12 of the first ball disc 7 and the brake disc 1 ; the second spring 5 is disposed between the inner ring 12 of the second ball disc 6 and the brake disc 1 .

[0040] In some embodiments, when the first ball disc 7 moves axially relative to the first bracket 2, the inner ring 12, balls 13 and outer ring 14 of the first ball disc 7 move axially synchronously; when the second ball disc 6 moves axially relative to the second ball disc 8, the inner ring 12, balls 13 and outer ring 14 of the second ball disc 6 move axially synchronously.

[0041] In some embodiments, a first spring groove is provided on the side of the brake disc 1 close to the first ball disc 7, one end of the first spring 4 is provided in the first spring groove, and the other end is in contact with the first ball disc 7; a second spring groove is provided on the side of the brake disc 1 close to the second ball disc 6, one end of the second spring is provided in the second spring groove, and the other end is in contact with the second ball disc 6; the first spring 4 and the second spring 5 are always in a compressed state. The first spring groove can also be provided on the side of the first ball disc 7 close to the brake disc 1, and the second spring groove can be provided on the side of the second ball disc 6 close to the brake disc 1, or spring grooves can be provided on the brake disc 1 and the ball discs accordingly.

[0042] In some embodiments, the installation groove is filled with sealant. When the coil 3 is installed in the installation groove, the sealant fills the gap between the coil 3 and the installation groove.

[0043] In some embodiments, when the coil 3 loses power, the inter-disc gaps between the first ball disc 7 and the second ball disc 6 and the brake disc 1 are both 1 mm-1.5 mm, forming a safety gap.

[0044] In some embodiments, the outer periphery of the first bracket 2 and the second bracket 8 are both provided with fixing ears 15, and the fixing ears 15 are provided with fixing holes. The first bracket 2 and the second bracket 8 are both connected to the vehicle body by screws passing through the fixing holes.

[0045] In summary, the electromagnetic vehicle brake device provided by the utility model comprises a brake disc 1, a first ball disc 7 and a second ball disc 6, the brake disc 1 is coaxially sleeved and fixed outside the rotating shaft 9, the first ball disc 7 and the second ball disc 6 are coaxially sleeved outside the rotating shaft 9, and the first ball disc 7 and the second ball disc 6 are respectively arranged on both sides of the brake disc; an annular mounting groove is coaxially arranged on the outer side of the first ball disc 7, a coil 3 is arranged in the mounting groove, a first spring 4 is arranged between the first ball disc 7 and the brake disc 1, and a coil 3 is arranged between the second ball disc 6 and the brake disc 1. A second spring 5 is provided; when the coil 3 is energized, the first ball disc 7 and the second ball disc 6 generate magnetic force to move closer to each other, and attract and press the brake disc 1 to prevent the brake disc 1 and the rotating shaft 9 from rotating; when the coil 3 is de-energized, the first ball disc 7 and the second ball disc 6 leave the brake disc 1 under the elastic force of the first spring 4 and the second spring 5 respectively, allowing the brake disc 1 and the rotating shaft 9 to rotate; the coil 3 is energized, and the electromagnetically controlled ball discs attract the brake disc 1 to generate braking force, eliminating high-cost components such as motors and transmission mechanisms, reducing costs, simplifying control strategies, and improving response time.

[0046] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

[0047] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. An electromagnetic vehicle brake device, characterized in that: The invention comprises a brake disc, a first ball disc and a second ball disc, wherein the brake disc is coaxially sleeved and fixed outside a rotating shaft, the first ball disc and the second ball disc are coaxially sleeved outside the rotating shaft and are respectively arranged on both sides of the brake disc; the first ball disc is embedded in a first bracket and can move axially relative to the first bracket, and the second ball disc is embedded in a second bracket and can move axially relative to the second bracket; the first bracket and the second bracket are respectively arranged on both sides of the brake disc to connect with the vehicle body; an annular ring is coaxially arranged on the outer side of the first ball disc an installation groove, a coil is arranged in the installation groove, a first spring is arranged between the first ball disc and the brake disc, and a second spring is arranged between the second ball disc and the brake disc; when the coil is energized, the first ball disc and the second ball disc generate magnetic force to move closer to each other, and attract and press the brake disc to prevent the brake disc and the rotating shaft from rotating; when the coil is de-energized, the first ball disc and the second ball disc leave the brake disc under the elastic force of the first spring and the second spring respectively, allowing the brake disc and the rotating shaft to rotate.

2. The electromagnetic vehicle brake device according to claim 1, characterized in that: The inner walls of the first bracket and the second bracket are both axially provided with positioning ribs, and the outer walls of the first ball disc and the second ball disc are both provided with positioning grooves matching the positioning ribs. When the first ball disc is embedded in the first bracket, the positioning groove is installed corresponding to the positioning rib to prevent the first ball disc from rotating relative to the first bracket; when the second ball disc is embedded in the second bracket, the positioning groove is installed corresponding to the positioning rib to prevent the second ball disc from rotating relative to the second bracket.

3. The electromagnetic vehicle brake device according to claim 1, characterized in that: The first ball disc and the second ball disc each include an inner ring, balls and an outer ring. The balls are arranged between the coaxially arranged inner ring and outer ring to separate the inner ring and the outer ring and allow the inner ring and the outer ring to rotate relative to each other.

4. The electromagnetic vehicle brake device according to claim 3, characterized in that: The inner rings of the first ball disc and the second ball disc rotate synchronously with the rotating shaft and the brake disc.

5. The electromagnetic vehicle brake device according to claim 4, characterized in that: The first spring is arranged between the inner ring of the first ball disc and the brake disc; the second spring is arranged between the inner ring of the second ball disc and the brake disc.

6. The electromagnetic vehicle brake device according to claim 3, characterized in that: When the first ball disc moves axially relative to the first bracket, the inner ring, balls and outer ring of the first ball disc move axially synchronously; when the second ball disc moves axially relative to the second ball disc, the inner ring, balls and outer ring of the second ball disc move axially synchronously.

7. The electromagnetic vehicle brake device according to claim 1, characterized in that: A first spring groove is provided on the side of the brake disc close to the first ball disc, one end of the first spring is provided in the first spring groove, and the other end abuts against the first ball disc; a second spring groove is provided on the side of the brake disc close to the second ball disc, one end of the second spring is provided in the second spring groove, and the other end abuts against the second ball disc; the first spring and the second spring are always in a compressed state.

8. The electromagnetic vehicle brake device according to claim 1, characterized in that: The installation groove is filled with sealant. When the coil is installed in the installation groove, the sealant fills the gap between the coil and the installation groove.

9. The electromagnetic vehicle brake device according to claim 1, characterized in that: When the coil loses power, the inter-disc gaps between the first ball disc, the second ball disc and the brake disc are both 1mm-1.5mm.

10. The electromagnetic vehicle brake device according to claim 1, characterized in that: The outer peripheries of the first bracket and the second bracket are both provided with fixing ears, the fixing ears are provided with fixing holes, and the first bracket and the second bracket are both connected to the vehicle body by screws passing through the fixing holes.

Images