Coil assembly with brake-by-wire function

Abstract

The utility model discloses a coil assembly with a brake-by-wire function, which belongs to the technical field of automobile brake-by-wire chassis and comprises a main shell, a soft limit and a hard limit are connected onto the main shell, the main shell is connected with an ESC coil, the ESC coil comprises a coil shell, a coil bottom plate is arranged at the bottom of the coil shell, and a coil framework is arranged at the top of the coil bottom plate. An enameled wire is wound on the coil framework, a positioning column is fixed at the top of one side of the coil framework, a bulge is fixed at the top of the other side of the coil framework, and a PIN1 and a PIN2 are connected to the bulge. According to the coil assembly with the brake-by-wire function, the soft limit is arranged between the coil shell and the main shell, the ESC coil can be adjusted along with the position of the electromagnetic valve when the position of the electromagnetic valve deflects, and the hard limit can fix the coil framework and the coil shell, so that the ESC coil is assembled within a reasonable range; the coil bottom plate is higher than the lining face, the contact area between the ESC coil and the HCU is increased, the ESC coil and the HCU are better matched, the coil shell is matched with the soft limit, and the good damping effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electro-hydraulic braking chassis, in particular to a coil assembly for electro-hydraulic braking function. Background Art

[0002] With the popularization and development of automobiles, the safety performance of automobiles has become an important consideration in the development of automobiles. The research on automobile chassis is extremely important. As the brain of the automobile chassis system, the ECU is responsible for receiving signals and transmitting the signals to the HCU for braking. Among them, the electromagnetic coil generates a magnetic field after being energized, converts electrical energy into magnetic energy, and controls the on-off of the solenoid valve to achieve different functions in different scenarios. It is an essential part of ESC (Electronic Stability Control). ESC (Electronic Stability Control System) can help avoid danger. When turning quickly or changing lanes, and the vehicle is extremely unstable, it compensates for the vehicle stability by controlling the wheel brakes or the engine torque.

[0003] With the development of automotive electrification, the noisy fuel engine is cancelled and replaced with a quieter drive motor. As a result, higher requirements are placed on the NVH effect of electro-hydraulic braking products such as ESC / ONE-BOX. In the assembly process of traditional coils, in order to better cooperate with the HCU and improve the quietness, under certain conditions, even a part of the electromagnetic force is sacrificed to ensure better cooperation with the HCU, which will lead to insufficient pressure reduction response.

[0004] The traditional ESC coil is welded on the PCBA board, and the internal moving area of the coil is limited. When the coil is welded to the PCBA board, it is difficult to change the position again. In a harsh environment, the unstable coil attitude will make the product unstable and other disadvantages. The biggest problem is that due to the limited gap, the assembly of the ECU coil and the HCU solenoid valve often gets stuck, affecting the assembly efficiency of the production line. As a result, most domestic manufacturers use manual assembly for the ECU and HCU assembly, making it difficult to improve the CT. Summary of the Invention

[0005] The purpose of the utility model is to provide a coil assembly for electro-hydraulic braking function. A soft limit is provided between the coil housing and the main housing. When the solenoid valve is skewed, the ESC coil can be adjusted with the position of the solenoid valve. The hard limit can fix the assembly of the coil skeleton and the coil housing, making the assembly of the ESC coil within a reasonable range. The coil bottom plate is higher than the bushing surface, which can increase the contact area between the ESC coil and the HCU, enabling better cooperation between the ESC coil and the HCU. At the same time, the coil housing cooperates with the soft limit, having a good damping effect.

[0006] To achieve the above object, the utility model provides a coil assembly for a wire-controlled braking function, which includes a main housing. A soft limit and a hard limit are connected to the main housing. The main housing is connected to an ESC coil. The ESC coil includes a coil housing. A coil bottom plate is provided at the bottom of the coil housing. A coil bobbin is provided on top of the coil bottom plate. An enameled wire is wound around the coil bobbin. A positioning post is fixed to the top of one side of the coil bobbin, and a protrusion is fixed to the top of the other side. PIN1 and PIN2 are connected to the protrusion.

[0007] Preferably, a first gap is provided axially between the coil bobbin and the coil housing, and a second gap is provided radially.

[0008] Preferably, first mounting grooves are staggeredly arranged on the main housing. A second mounting groove is provided at the bottom of the first mounting groove. A third mounting groove is provided on one side of the second mounting groove. A fourth mounting groove, two soft limits and two hard limits are provided between the second mounting groove and the third mounting groove. The two soft limits and the two hard limits are respectively located on both sides of the fourth mounting groove.

[0009] Preferably, the second mounting groove cooperates with the positioning post, the third mounting groove cooperates with the protrusion, PIN1 and PIN2, and the fourth mounting groove cooperates with the solenoid valve.

[0010] Preferably, the solenoid valve cooperates with the inner side of the coil bobbin.

[0011] Preferably, the ESC coil is inversely welded on the PCBA board. A bushing surface is provided at the top of the main housing. The coil bottom plate of the ESC coil is higher than the bushing surface.

[0012] Therefore, the utility model adopts the above coil assembly for a wire-controlled braking function, and has the following beneficial effects:

[0013] 1. PIN1 and PIN2 are fixedly connected to the coil housing and the main housing, and a soft limit is provided between the coil housing and the main housing. When the position of the solenoid valve is skewed, the ESC coil can float and adjust with the position of the solenoid valve;

[0014] 2. The hard limit can fix the assembly of the coil bobbin and the coil housing, so that the assembly of the ESC coil is within a reasonable range, and the ESC coil can provide electromagnetic force well in any posture;

[0015] 3. After the ESC coil is cooperatively installed with the main housing, there is a first gap between the coil bottom plate and the coil bobbin, which will make the coil bottom plate higher than the bushing surface, increasing the contact area between the ESC coil and the HCU, and enabling better cooperation between the ESC coil and the HCU;

[0016] 4. Since the coil base plate is higher than the bushing surface and the coil housing is in cooperation with the soft limit, it has a good shock absorption effect.

[0017] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0018] Figure 1 is the assembly drawing of an embodiment of the coil assembly for the electro-hydraulic braking function of the present utility model;

[0019] Figure 2 is the sectional view of B-B of an embodiment of the coil assembly for the electro-hydraulic braking function of the present utility model;

[0020] Figure 3 is the three-dimensional structure diagram of the ESC coil of an embodiment of the coil assembly for the electro-hydraulic braking function of the present utility model;

[0021] Figure 4 is the sectional view of the ESC coil of an embodiment of the coil assembly for the electro-hydraulic braking function of the present utility model;

[0022] Figure 5 is the sectional view of the ESC coil and the solenoid valve of an embodiment of the coil assembly for the electro-hydraulic braking function of the present utility model.

[0023] Reference Numerals

[0024] 1, main housing; 2, first installation groove; 3, second installation groove; 4, third installation groove; 5, fourth installation groove; 6, soft limit; 7, hard limit; 8, bushing surface; 9, coil housing; 10, coil base plate; 11, coil skeleton; 12, positioning post; 13, solenoid valve; 14, first gap; 15, second gap. Detailed Embodiment

[0025] The technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0026] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar terms used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0027] Embodiment 1

[0028] As Figures 1 to 5 shown, the present utility model provides a coil assembly for a wire control braking function, including a main housing 1. First mounting grooves 2 are arranged staggeredly on the main housing 1. A second mounting groove 3 is provided at the bottom of the first mounting groove 2. A third mounting groove 4 is provided on one side of the second mounting groove 3. A fourth mounting groove 5, two soft limits 6 and two hard limits 7 are provided between the second mounting groove 3 and the third mounting groove 4. The two soft limits 6 and the two hard limits 7 are respectively located on both sides of the fourth mounting groove 5. The first mounting groove 2, the second mounting groove 3, the third mounting groove 4 and the fourth mounting groove 5 provide space for the installation of the ESC coil and the solenoid valve 13. The hard limit 7 and the soft limit 6 can limit the ESC coil. The soft limit 6 is higher than the hard limit 7 to achieve a shock absorption function, so that the ESC coil can provide electromagnetic force well in any posture.

[0029] The main housing 1 is connected to the ESC coil. The ESC coil is inverted and welded on the PCBA board, that is, PIN1 and PIN2 are fixedly connected to the coil housing 9 and the main housing 1. When the position of the solenoid valve 13 is skewed, the ESC coil can float and adjust with the electromagnetic position. The ESC coil includes a coil housing 9. A coil bottom plate 10 is provided at the bottom of the coil housing 9. The coil housing 9 and the coil bottom plate 10 protect the enameled wire and provide a good electrical insulation environment to protect the enameled wire from the influence of the external environment.

[0030] The top of the coil base plate 10 is provided with a coil bobbin 11, on which an enameled wire is wound. The coil bobbin 11 provides support for the enameled wire wound on the coil, ensuring that the enameled wire can maintain a predetermined shape and position. On one side of the top of the coil bobbin 11, a positioning post 12 is fixed. The top of the positioning post 12 is provided with a chamfer of R0.5. On the other side of the top, a protrusion is fixed, and PIN1 and PIN2 are connected to the protrusion. The positioning post 12 has a guiding function, which can ensure that PIN1 and PIN2 are maintained in a fixed spatial position, and PIN1 and PIN2 are used for signal transmission.

[0031] A first gap 14 is provided axially between the coil bobbin 11 and the coil housing 9, and a second gap 15 is provided radially. The provision of the first gap 14 and the second gap 15 between the coil bobbin 11 and the coil housing 9 can ensure that the coil bobbin 11 has a certain activity area, which can better cooperate with the solenoid valve 13 during assembly. When there is an assembly error in the solenoid valve 13, the error can be corrected through the mutual cooperation of the first gap 14 and the second gap 15. At the same time, it is ensured that the ESC coil can provide sufficient electromagnetic force to control the opening and closing of the solenoid valve 13 under any harsh working conditions, ensuring the function of the ESC coil.

[0032] The second installation groove 3 cooperates with the positioning post 12, the third installation groove 4 cooperates with the protrusion, PIN1 and PIN2, and the fourth installation groove 5 cooperates with the solenoid valve 13, which can ensure the assembly accuracy and facilitate the welding of the ESC coil to the PCBA board. The solenoid valve 13 cooperates with the inner side of the coil bobbin 11, and the ESC coil generates electromagnetic force to control the movement of the spool of the solenoid valve 13, thereby realizing the opening or closing of the valve.

[0033] The top of the main housing 1 is provided with a bushing surface 8, and the coil base plate 10 of the ESC coil is higher than the bushing surface 8. The higher part can make there be a certain interference amount between the HCU surface and the coil base plate 10, making the contact between the HCU and the coil closer.

[0034] When using a coil assembly for a wire-controlled braking function provided by the present utility model, first wind the enameled wire on the coil bobbin 11, then install the coil housing 9 and the coil base plate 10, and install PIN1 and PIN2 on the coil bobbin 11. After installation, install the ESC coil on the main housing 1 in the reverse direction, so that the top of the coil housing 9 cooperates with the soft limit 6 and the hard limit 7 to ensure the assembly accuracy and realize the shock absorption function. Then weld PIN1 and PIN2 to the PCBA board to facilitate signal transmission.

[0035] Therefore, the coil assembly with the above-mentioned line control function is adopted in the present utility model. A soft limit is provided between the coil housing and the main housing. When the solenoid valve is skewed, the ESC coil can be adjusted along with the position of the solenoid valve. The hard limit can fix the assembly of the coil skeleton and the coil housing, so that the assembly of the ESC coil is within a reasonable range. The coil bottom plate being higher than the bushing surface can increase the contact area between the ESC coil and the HCU, enabling better cooperation between the ESC coil and the HCU. At the same time, the coil housing cooperates with the soft limit, having a good shock absorption effect.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A coil assembly for a wire control braking function, characterized in that: It includes a main housing, on which a soft limit and a hard limit are connected. The main housing is connected to an ESC coil. The ESC coil includes a coil housing, at the bottom of which there is a coil bottom plate, and on the top of the coil bottom plate there is a coil bobbin. An enameled wire is wound around the coil bobbin. On one side of the top of the coil bobbin, a positioning post is fixed, and on the other side of the top, a protrusion is fixed. PIN1 and PIN2 are connected to the protrusion.

2. The coil assembly for the line control braking function according to claim 1, characterized in that: There is a first gap axially between the coil bobbin and the coil housing, and a second gap radially.

3. A coil assembly for a wire-controlled braking function according to claim 1, characterized in that: First mounting grooves are arranged staggeredly on the main housing. At the bottom of the first mounting groove, there is a second mounting groove. On one side of the second mounting groove, there is a third mounting groove. Between the second mounting groove and the third mounting groove, there are a fourth mounting groove, two soft limits and two hard limits. The two soft limits and the two hard limits are respectively located on both sides of the fourth mounting groove.

4. A coil assembly for a wire-controlled braking function according to claim 3, characterized in that: The second mounting groove cooperates with the positioning post, the third mounting groove cooperates with the protrusion, PIN1 and PIN2, and the fourth mounting groove cooperates with the solenoid valve.

5. A coil assembly for a wire-controlled braking function, characterized in that: The solenoid valve cooperates with the inner side of the coil bobbin.

6. The coil assembly for the line control braking function according to claim 1, characterized in that: The ESC coil is inverted and welded on the PCBA board. There is a bushing surface at the top of the main housing, and the coil bottom plate of the ESC coil is higher than the bushing surface.

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