EMB locking mechanism and vehicle

Abstract

The utility model discloses an EMB locking mechanism which comprises an electromagnet assembly, the electromagnet assembly comprises a busbar and a coil winding support which are connected, and the busbar and the coil winding support are integrally formed in an injection molding mode. According to the EMB locking mechanism, the busbar and the coil winding support are subjected to integral injection molding, so that hard connection is firmer, the connection strength between the electromagnet and the busbar is improved, and the anti-vibration capacity is improved. The utility model further discloses a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of brake systems, and specifically relates to an EMB locking mechanism and a vehicle. Background Art

[0002] With the electrification transformation of vehicles, wire-controlled brake systems have gradually become a major development trend in the automotive industry. As one of them, the electromechanical brake (EMB) system adopts the form of direct drive of the wheel-end motor. Through the motion conversion mechanism, the torque and rotational motion of the motor are converted into the thrust and translational motion of the connecting parts, pushing the brake pads to clamp the brake disc, thereby obtaining braking force. At the same time, as an emerging braking system, electronic mechanical braking has abandoned large components such as vacuum boosters and hydraulic pipelines, making the chassis layout of the whole vehicle simpler and more flexible, and has the advantages of fast and precise pressure regulation, which can significantly improve the braking performance of the whole vehicle.

[0003] In the existing EMB brake caliper technical solutions, the brake caliper structure has a locking mechanism, one of which uses an electromagnet as a locking power device. The power transmission route is pinned and unlocked by extending and retracting the electromagnet locking head, thereby achieving the locking of the entire parking system. Among them, the electromagnet is an electronic component, and a connector is needed to connect the electromagnet to the circuit board to receive and execute ECU (electronic control unit) commands. The current connector solutions mostly use male and female connector connections or PIN pin welding, etc., but based on the current design of the electromagnet connector, the layout space and protection requirements are limited, and there may be difficulties in connector selection or welding process implementation. Among them, the connection methods such as wiring harnesses and connectors have the following problems:

[0004] 1. The wheel end has severe vibration conditions, and the solution using connectors and soft cables may have the risk of vibration damage;

[0005] 2. Connector assembly requires space. Waterproof connectors are large in size. EMB design space is compact and layout space is small, which results in limited connector layout and selection when using connector solutions. When the busbar subassembly welding solution is adopted, the welding connection space process operation is limited;

[0006] 3. The protection requirements are high, and the connector or welding solution may need to add additional sealing structure;

[0007] 4. The soft wire needs to be positioned and fixed, which requires space and will make the EMB not compact;

[0008] 5. If the busbar is assembled separately, space for process assembly needs to be reserved, and additional protective structures need to be added. Utility Model Content

[0009] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an EMB locking mechanism, the purpose of which is to improve the connection strength of parts.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an EMB locking mechanism includes an electromagnet assembly, the electromagnet assembly includes a busbar and a coil winding bracket connected to each other, and the busbar and the coil winding bracket are integrally injection molded.

[0011] Pin needles are injection-molded in the busbar, and the pin needles are connected to the connector terminals of the coil windings arranged on the coil winding support, and the connection method between the pin needles and the connector terminals of the coil windings is welding or crimping.

[0012] The lead-out end of the pin is connected to the circuit board, and the connection method between the two is welding or crimping.

[0013] A sealing ring is arranged on the busbar, the sealing ring is an O-ring and the cross section of the sealing ring is a circular or square structure.

[0014] The lead-out end of the pin needle is provided with a bending structure.

[0015] The pin needles are arranged asymmetrically at one end away from the winding coil support.

[0016] The busbar is L-shaped, and one end of the L-shaped busbar away from the winding coil support is parallel to the winding support.

[0017] The electromagnet assembly further comprises a position detection element, and the position detection element is located inside the busbar.

[0018] The position detection element is a Hall sensor.

[0019] The electromagnet assembly further comprises a coil winding and a permanent magnet, wherein the coil winding and the permanent magnet are arranged on the coil winding support.

[0020] The utility model also provides a vehicle, comprising the EMB locking mechanism.

[0021] The EMB locking mechanism of the utility model adopts the integrated injection molding of the busbar and the coil winding bracket, so that the hard connection is more reliable, the connection strength between the electromagnet and the busbar is increased, and the anti-vibration ability is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] This specification includes the following drawings, which show the following contents:

[0023] Figure 1 It is the overall structural view of the electromagnet assembly;

[0024] Figure 2 is a cross-sectional view of the electromagnet assembly;

[0025] Figure 3 This is the integrated injection molding structure diagram of the busbar and coil bracket;

[0026] Figure 4 This is the winding assembly diagram after the busbar and coil support are integrally injected;

[0027] Figure 5 This is the secondary injection molding structure diagram of the bracket after winding;

[0028] Figure 6 is a schematic cross-sectional view of the MGU;

[0029] Figure 7 It is a schematic diagram of the injection-molded busbar with Hall sensor;

[0030] Figure 8 It is a schematic cross-sectional diagram of an injection-molded busbar with a Hall sensor;

[0031] Fig. 9 This is a schematic diagram of the integrated injection molding assembly of the busbar and coil winding;

[0032] Fig.10 It is a schematic diagram of the arrangement of pins on the end face of the busbar;

[0033] The markings in the figure are:

[0034] 1. Electromagnet assembly; 1a. Integral injection molding structure of busbar and coil bracket; 1a1. Busbar; 1a2. Coil winding bracket; 1a3. Sealing ring; 1a4. Pin needle; 1b. Electromagnet housing; 1c. Electromagnet end cover; 1d. Electromagnet push rod; 1e. Static iron core; 1f. Moving iron core; 1g. Coil winding; 1h. Coil winding; 1i. Static iron core; 1k. Hall sensor; 1m. Permanent magnet; 2. Brushless motor; 3. MGU housing; 3a. Electromagnet cavity; 4. Dual gear; 5. ECU housing; 6. Circuit board; 7. ECU shell cover; 8. Axle pin; 9. Plane. DETAILED DESCRIPTION

[0035] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping technicians in the field to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model and facilitating its implementation.

[0036] like Figures 1 to 6As shown, the utility model provides an EMB locking mechanism, which locks the motor shaft or gear by extending and retracting the locking head of the electromagnet assembly, thereby realizing the locking function of the EMB system. The EMB locking mechanism includes an electromagnet assembly 1, and the electromagnet assembly 1 includes a busbar 1a1 and a coil winding bracket 1a2 connected to each other, and the busbar 1a1 and the coil winding bracket 1a2 are integrally injection molded.

[0037] The utility model proposes a locking mechanism with an integral injection-molded busbar electromagnet structure, which realizes the locking function of the brake system by arranging the locking mechanism on the transmission path. The specific locking method is that the electromagnet is arranged in the cavity of the MGU housing as a driving device, and the gear with a locking groove structure is fixed to the MGU housing through an axle pin, and the locking groove is integrated on the double gear. The locking function of the entire brake system is realized by extending and retracting the locking head of the electromagnet to cooperate and unlock with the fan-shaped locking groove on the gear.

[0038] In the utility model, the electromagnet is connected to the circuit board through a busbar, and the busbar and the electromagnet coil bracket are integrally injection molded. On the one hand, the busbar and the electromagnet are integrated into one through the one-piece injection molding process, which increases the connection strength between the busbar and the electromagnet, and at the same time increases the vibration resistance of the busbar connection. On the other hand, the one-piece injection molding can save the radial space required for the separate connection between the busbar and the electromagnet, making the design of the electromagnet more compact and maximizing the radial space utilization.

[0039] Specifically, if Figure 2 As shown, the electromagnet assembly also includes an electromagnet housing 1b, an electromagnet end cover 1c, an electromagnet push rod 1d, two static iron cores 1e and 1i, a moving iron core 1f, and two coil windings 1g and 1h. The electromagnet end cover 1c is fixedly set on the top of the electromagnet housing 1b, the static iron core 1i is fixedly set on the electromagnet end cover 1c, the static iron core 1e is fixedly set on the bottom of the electromagnet housing 1b, the coil winding 1h and the coil winding 1g are arranged on the coil winding bracket 1a2, and two annular permanent magnets 1m are also arranged on the coil winding bracket 1a2. The two annular permanent magnets 1m are located between the coil winding 1h and the coil winding 1g, and the busbar and the coil winding bracket integrally injected structure 1a are arranged in Inside the electromagnet housing 1b, the busbar 1a1 is located outside the electromagnet housing 1b, the electromagnet end cover 1c is riveted to the electromagnet housing 1b, the static iron core 1i is arranged at the center of the electromagnet end cover 1c, the electromagnet push rod 1d is fixedly connected to the moving iron core 1f, the moving iron core is located between the two static iron cores 1e and 1i, the electromagnet push rod 1d is axially arranged through the two static iron cores, and the sealing ring 1a3 is arranged in a sealing groove set on the outer circular surface of the lead-out end of the busbar 1a1 close to the pin needle 1a4.

[0040] like Figures 1 to 5As shown, the busbar 1a1 is L-shaped, and the busbar 1a1 and the coil winding support 1a2 are arranged in parallel in the axial direction. The end of the busbar 1a1 away from the winding support 1a2 is parallel to the axis of the coil winding support 1a2, which can shorten the radial space, help reduce the volume of the electromagnet, and facilitate the arrangement. The busbar 1a1 includes a first connecting section and a second connecting section connected to each other, one end of the first connecting section in the length direction is fixedly connected to the coil winding support 1a2, and the other end of the first connecting section in the length direction is fixedly connected to one end of the second connecting section in the length direction. The pin needle 1a4 extends outward from the other end of the second connecting section in the length direction, and the length direction of the second connecting section is parallel to the axis of the coil winding support 1a2. There is a certain distance between the second connecting section and the axis of the coil winding support 1a2.

[0041] like Figure 7 and Figure 8 As shown, the electromagnet assembly also includes a position detection element, which is located inside the busbar 1a1 and is a Hall sensor 1k.

[0042] like Figures 1 to 5 As shown, the busbar 1a1 is molded with a pin 1a4, which is connected to the connector terminals of the coil windings 1g and 1h arranged on the coil winding support 1a2, and the connection between the pin 1a4 and the connector terminals of the coil windings 1g and 1h is welding or crimping. The pin 1a4 is arranged in a radial offset manner to make full use of the radial space.

[0043] like Figures 1 to 5 As shown, the lead-out end of the pin needle 1a4 is connected to the circuit board, and the connection method of the two is welding or crimping. In addition, the lead-out end of the pin needle 1a4 adopts a large chamfered bending structure for buffering between the circuit board. At the same time, the pin needle 1a4 is arranged radially outwardly, and the entire busbar 1a1 is arranged axially parallel to the coil winding bracket 1a2, which maximizes the use of radial space.

[0044] like Figures 1 to 5 and Fig.10As shown, the pin needle 1a4 is arranged asymmetrically at one end away from the winding coil support 1a2, and two pin needles 1a4 are provided. The plane 9 where the lead-out points of the two pin needles 1a4 are located is parallel to the center line of the busbar 1a1 (the center line of the busbar 1a1 is also the axis of the second connecting section, the second connecting section is a cylinder, and the axis of the second connecting section is parallel to the axis of the winding coil support 1a2). There is a certain distance between the plane 9 where the lead-out points of the two pin needles 1a4 are located and the center line of the busbar 1a1. The pin needle 1a4 is led outward from the end surface of the busbar 1a1. The lead-out point of the pin needle 1a4 refers to the part where the pin needle 1a4 intersects with the end surface of the busbar 1a1. The lead-out end of the pin needle 1a4 extends toward the inside of the plane 9, and the axis of the winding coil support 1a2 is located on the inside of the plane 9. This arrangement can ensure that the lead-out end of the pin needle 1a4 can form a large angle bend, which can achieve a better buffering effect.

[0045] like Figures 1 to 5 As shown, a sealing ring 1a3 is provided on the busbar 1a1 for sealing and protecting the circuit board. The sealing ring 1a3 is an O-ring and the cross section of the sealing ring 1a3 is a circular or square structure.

[0046] Preferably, a deweighting structure is provided on the busbar 1a1 to reduce materials and lower costs.

[0047] like Figure 3 As shown, the busbar 1a1 and the coil support are integrally injection molded, and then the winding assembly is performed;

[0048] like Figure 4 As shown, after the coil winding bracket 1a2 is injection molded, the winding assembly is performed, and then the coil winding bracket 1a2 is injection molded with the busbar 1a1 for the second time.

[0049] The locking mechanism of the above structure has the following advantages:

[0050] 1. Simplify the locking mechanism module and reduce manufacturing costs: adopting one-piece injection molding can reduce the design of connectors and related protective structure parts, integrate parts, and reduce the manufacturing cost of the product;

[0051] 2. Maximize radial space utilization: Injection molding the busbar and the bracket as one piece can save space for welding or connector layout, maximizing radial space utilization;

[0052] 3. Improved the connection strength of parts: The busbar and coil winding bracket are integrally injection molded to make the hard connection more reliable, increase the connection strength between the electromagnet and the busbar, and improve the ability to resist vibration.

[0053] like Figure 6As shown, it is an exploded schematic diagram of the MGU with the locking mechanism of the above structure, the brushless motor 2 is arranged in the cavity corresponding to the MGU housing 3, the shaft pin 8 is press-fitted on the MGU housing 3, wherein the shaft pin 8 is arranged axially parallel to the axis of the brushless motor 2, the double gear 4 is assembled on the MGU housing 3 through the shaft pin 8, the electromagnet assembly 1 is arranged in the installation cavity 3a of the MGU housing 3, the ECU housing 5 is fixedly connected to the MGU housing 3, the circuit board 6 is arranged in the ECU housing 5, the busbar structure of the electromagnet assembly is arranged along the outer end of the double gear, maintaining a safety gap with the double gear, and the ECU shell cover 7 is fixedly connected to the ECU housing 5.

[0054] When the parking lock is engaged, the ECU transmits the locking command to the electromagnet assembly through the busbar, the electromagnet assembly is energized, the electromagnet push rod and the moving iron core extend, the push rod head extends into the locking groove on the end face of the duplex gear, the push rod cooperates with the locking groove to limit the rotation of the duplex gear, thereby realizing the locking function; when the parking lock is released, the ECU transmits the release command to the electromagnet assembly through the busbar, the electromagnet is energized in the reverse direction, the electromagnet push rod and the moving iron core retract, the push rod head retracts out of the locking groove on the end face of the duplex gear, the push rod is decoupled from the locking groove, the rotation of the duplex gear is not restricted by the push rod, thereby realizing the parking lock release.

[0055] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. EMB locking mechanism, including an electromagnet assembly, the electromagnet assembly includes a busbar and a coil winding support connected, characterized in that: The busbar and the coil winding bracket are integrally injection molded; Pin needles are injection-molded in the busbar, and the pin needles are connected to the connector terminals of the coil windings arranged on the coil winding support, and the connection method between the pin needles and the connector terminals of the coil windings is welding or crimping.

2. The EMB locking mechanism according to claim 1, characterized in that: The lead-out end of the pin is connected to the circuit board, and the connection method between the two is welding or crimping.

3. The EMB locking mechanism according to claim 1, characterized in that: The busbar is provided with a sealing ring, which is an O-ring and has a circular or square cross section.

4. The EMB locking mechanism according to any one of claims 1 to 3, characterized in that: The lead-out end of the pin needle is provided with a bending structure.

5. The EMB locking mechanism according to any one of claims 1 to 3, characterized in that: The pin needles are arranged asymmetrically at one end away from the coil winding support.

6. The EMB locking mechanism according to any one of claims 1 to 3, characterized in that: The busbar is L-shaped, and one end of the L-shaped busbar away from the coil winding support is parallel to the winding support.

7. The EMB locking mechanism according to any one of claims 1 to 3, characterized in that: The electromagnet assembly further comprises a position detection element, and the position detection element is located inside the busbar.

8. The EMB locking mechanism according to claim 7, characterized in that: The position detection element is a Hall sensor.

9. The EMB locking mechanism according to any one of claims 1 to 3, characterized in that: The electromagnet assembly further comprises a permanent magnet, which is arranged on the coil winding support.

10. A vehicle, characterized in that: It comprises the EMB locking mechanism described in any one of claims 1 to 9.

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