CN211930425U

CN211930425U - Motor for automobile brake system

Info

Publication number: CN211930425U
Application number: CN202020720195.8U
Authority: CN
Inventors: 蒋开洪; 毛睿; 严力
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-11-13
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses a motor for automobile brake system, including motor element and hydraulic manifold, motor element install the one side at the hydraulic manifold, motor element include motor housing and the stator of setting at the inside center of motor housing, the outside of stator be provided with the external rotor, the inside ball screw that is provided with of center of stator pair, the one end of stator be connected with servo cylinder piston, servo cylinder piston insert the servo cylinder subassembly of hydraulic manifold side-mounting in, the vice lead screw of external rotor drive ball screw rotate together, the nut linear motion who cup joints on the lead screw drives stator and servo cylinder piston and carries out linear motion. The utility model discloses arrange inside the motor servo cylinder subassembly, the integrated level is high, small.

Description

Motor for automobile brake system

Technical Field

The utility model relates to a motor field specifically is a motor for car braking system for car.

Background

The motor is a power source of an automobile linear brake product, and the main function of the motor is to convert the rotary motion of the rotor into the linear motion of the internal motion pair through the motor and the internal motion pair, so that the pressure output of the hydraulic unit is realized. The common structure of motor structure is that the rotor is located inside the stator, and this type of structure can't utilize the inside cavity space of motor high-efficiently usually to cause linear product overall structure complicated, bulky, shortcoming such as quality is heavy, hydraulic manifold block pipe arrangement difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor for automobile brake system arranges inside the motor servo cylinder subassembly, and the integrated level is high, small.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a motor for automobile brake system, includes motor element and hydraulic manifold, motor element install the one side at the hydraulic manifold, motor element include motor housing and set up the stator at the inside center of motor housing, the outside of stator be provided with the external rotor, the inside ball screw pair that is provided with in center of stator, the one end of stator be connected with servo cylinder piston, servo cylinder piston insert in the servo cylinder subassembly of hydraulic manifold side-mounting, the vice lead screw of external rotor drive ball screw rotate together, the nut linear motion that cup joints on the lead screw drives stator and servo cylinder piston and carries out linear motion.

From the outside, whole device only includes motor element and hydraulic manifold, and the servo cylinder subassembly also sets up inside motor element, and whole volume ratio is less, and the integrated level is than higher.

Preferably, an electric control unit is installed on the other side of the hydraulic manifold block, the electric control unit is connected with the stator through a motor power line, a circuit board is arranged in the electric control unit and used for controlling the rotation of the motor, the connection between the motor power line and the circuit board is a hard line connection, but the stator winding and the three-phase power line of the motor need to be realized in a flexible wire mode, so that the stator can be conveniently and reliably connected in the whole stroke process.

Preferably, the hydraulic manifold block is provided with a motor angle sensor, one end of the outer rotor, which is close to the hydraulic manifold block, is provided with a magnetic ring, one end of the motor angle sensor senses a magnetic signal output by the magnetic ring, the other end of the motor angle sensor is connected with the electric control unit, when the outer rotor drives the magnetic ring to rotate, the magnetic signal is output to the motor angle sensor on the hydraulic manifold block, and finally, a signal received by the motor angle sensor is transmitted to the inside of the circuit board to be processed.

Preferably, one end of the outer rotor, which is far away from the hydraulic manifold block, is provided with a connecting plate, the center of the connecting plate is connected with the screw rod, the outer rotor is connected with the connecting plate through a plurality of connecting bolts around the circumference, the outer rotor and the screw rod can be firmly connected, and the screw rod is generally connected with the connecting plate through splines.

Preferably, the outer side of the middle of the connecting plate and the outer side of the outer rotor are connected with the motor shell through the tail end bearing and the front end bearing respectively, the outer rotor is prevented from shaking in the rotating process through the combined action of the tail end bearing and the front end bearing, and the rotating motion is more reliable.

As a supplement, one side of the center hole of the connecting plate is provided with a connecting plate limiting block, one end of the nut is provided with a nut limiting block on the same circumference with the connecting plate limiting block, when the servo cylinder needs pressure relief, the nut drives the stator and the servo cylinder piston to move towards one side close to the tail end bearing, and the maximum backspacing displacement of the nut is limited by the connecting plate limiting block and the nut limiting block.

And additionally, a plurality of stator guide columns axially inserted into the stator are arranged on the servo cylinder assembly, and the stator guide columns are used for realizing the guide effect through the linear motion of the stator, the servo cylinder piston and the nut.

Preferably, the servo cylinder assembly comprises a servo cylinder connected with the hydraulic manifold block and a stator positioning ring arranged on the outer side of one end of the servo cylinder, the stator guide column is inserted into the stator positioning ring, and the stator positioning ring is convenient for the installation of the stator guide column.

Preferably, one end of the servo cylinder, which is connected with the hydraulic manifold block, is a servo cylinder mounting plane, a protruding table-board is arranged in the middle of the servo cylinder mounting plane, the protruding table-board is favorable for avoiding the defect that the hydraulic manifold block occupies the pipeline design of the hydraulic manifold block due to the large hole, and a gasket is arranged between the protruding table-board and the hydraulic manifold block.

Preferably, the servo cylinder piston is provided with a servo cylinder leather cup which is contacted with the inner side wall of the servo cylinder on the outer side, so that hydraulic oil can be prevented from leaking.

Compared with the prior art, the beneficial effects of the utility model are that:

arrange in motor housing edge through with motor rotor, motor stator arranges near motor center, the stator is located inside the rotor promptly, the nut of placing in the ball screw of motor in vice is fixed with the stator in will, it is fixed with the lead screw of rotor in vice with ball screw, thereby turning into the linear motion of nut and stator through the rotary motion of rotor, thereby make the fluid that the piston that links together with the stator promotes in the servo cylinder produce the oil pressure, export to car brake caliper, produce the braking force, this kind of structure is favorable to arranging the servo cylinder subassembly inside the motor, thereby avoid the servo cylinder and the symmetrical arrangement of motor and cause product assembly bulky, shortcomings such as electric control unit circuit board needs the perforation. In addition, the space of the rotor part of the motor is utilized, so that the servo cylinder occupies less space of the hydraulic manifold block, the hydraulic manifold block pipeline arrangement at the later stage is convenient, and the servo cylinder has the characteristics of high integration level, small size and the like.

Drawings

FIG. 1 is a schematic view of a front view half-section structure of the present invention;

fig. 2 is a sectional view of the internal structure of the motor assembly of the present invention;

fig. 3 is a schematic view of the installation of the hydraulic manifold block and the servo cylinder of the present invention;

FIG. 4 is a block diagram of a servo cylinder assembly of the present invention;

FIG. 5 is a structural view of the connection plate of the present invention;

FIG. 6 is a structural diagram of the ball screw pair of the present invention;

fig. 7 is a schematic structural diagram of a servo cylinder according to the present invention;

fig. 8 is a schematic structural diagram of the electronic control unit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-8, the utility model provides a motor for automobile brake system, including motor element 2 and hydraulic manifold 1, motor element 2 install the one side at hydraulic manifold 1, motor element 2 include motor housing 201 and set up at the stator 207 at the inside center of motor housing 201, the outside of stator 207 be provided with external rotor 203, the inside ball screw pair 3 that is provided with in center of stator 207, the one end of stator 207 be connected with servo cylinder piston 208, servo cylinder piston 208 insert in the servo cylinder subassembly 4 of hydraulic manifold 1 side-mounting, external rotor 203 drive ball screw pair 3's lead screw 301 rotate together, the nut 302 linear motion that cup joints on the lead screw 301 drives stator 207 and servo cylinder piston 208 and carries out linear motion.

From the outside, whole device only includes motor element 2 and hydraulic manifold 1, and servo cylinder subassembly 4 also sets up inside motor element 2, and whole volume ratio is less, and the integration level is higher.

The other side of the hydraulic manifold block 1 is provided with an electric control unit 5, the electric control unit 5 is connected with the stator 207 through a motor power line 210, a circuit board 501 is arranged in the electric control unit 5 and used for controlling the rotation of the motor, the connection between the motor power line 210 and the circuit board 501 is a hard line connection, but a stator winding and a three-phase power line of the motor need to be realized in a flexible wire mode, so that the stator can be conveniently and reliably connected in the whole stroke process.

In addition, a motor angle sensor 6 is installed on the hydraulic manifold block 1, a magnetic ring 211 is installed at one end, close to the hydraulic manifold block 1, of the outer rotor 203, one end of the motor angle sensor 6 senses a magnetic signal output by the magnetic ring 211, the other end of the motor angle sensor is connected with the electronic control unit 5, when the outer rotor 203 drives the magnetic ring 211 to rotate, the magnetic signal is output to the motor angle sensor 6 located on the hydraulic manifold block 1, and finally, a signal received by the motor angle sensor 6 is transmitted to the interior of the circuit board 501 to be processed.

As an embodiment of the connection between the outer rotor 203 and the lead screw 301, a connecting plate 206 is installed at one end of the outer rotor 203 away from the hydraulic manifold 1, the center of the connecting plate 206 is connected with the lead screw 301, the outer rotor 203 and the connecting plate 206 are connected through a plurality of connecting bolts 204 around the circumference, the outer rotor 203 and the lead screw 301 can be firmly connected, and the lead screw 301 and the connecting plate 206 are generally connected by a flat key.

In order to ensure the reliable operation of the outer rotor 203, the middle outer side of the connecting plate 206 and the outer side of the outer rotor 203 are respectively connected with the motor housing 201 through the tail end bearing 205 and the front end bearing 202, and the outer rotor 203 is prevented from shaking in the rotating process through the combined action of the tail end bearing 205 and the front end bearing 202, so that the rotating motion is more reliable.

When the servo cylinder 401 needs to be decompressed, the nut 302 drives the stator 207 and the servo cylinder piston 208 to move towards one side close to the tail end bearing 205, and the maximum retraction displacement of the nut is limited by the connecting plate limiting block 206-1 and the nut limiting block 302-1.

In order to make the movement of the servo cylinder piston 208 more stable and smooth, the servo cylinder assembly 4 is provided with a plurality of stator guide posts 402 axially inserted into the stator 207, the servo cylinder piston 208 and the stator guide posts 402 through which the linear motion of the nut 302 passes realize a guiding function, and the number of the guide posts 402 is generally not less than three and is arranged around the circumference.

The servo cylinder assembly 4 comprises a servo cylinder 401 connected with the hydraulic manifold 1 and a stator positioning ring 403 arranged on the outer side of one end of the servo cylinder 401, the stator guide post 402 is inserted into the stator positioning ring 403, and the stator positioning ring 403 facilitates the installation of the stator guide post 402.

The servo cylinder 401 is connected with the hydraulic manifold block 1 through the servo cylinder mounting plane 401-1 at one end, the protruding table surface 401-2 is arranged in the middle of the servo cylinder mounting plane 401-1, the protruding table surface 401-2 is beneficial to avoiding the defect that the hydraulic manifold block 1 occupies the pipeline design of the hydraulic manifold block 1 due to the fact that a large hole is formed in the hydraulic manifold block 1, and the gasket 404 is arranged between the protruding table surface 401-2 and the hydraulic manifold block 1.

And a servo cylinder leather cup 209 which is contacted with the inner side wall of the servo cylinder 401 is arranged on the outer side of the servo cylinder piston 208, so that hydraulic oil can be prevented from leaking.

As an embodiment of the present invention, the assembly relationship of the motor assembly 1 is: the tail end bearing 205 and the front end bearing 202 are in interference press fit connection with the motor shell 201;

after the outer rotor 203 and the magnetic ring 211 are assembled into a whole, the outer rotor 203 and the magnetic ring 211 are connected into a whole through the connecting bolt 204, and the outer rotor 203, the connecting bolt 204, the connecting plate 206 and the magnetic ring 211 are pressed into the hole of the tail end bearing 205 which is assembled before;

the stator 207, the motor power line 210 and the nut 302 in the ball screw pair 3 are integrated through injection molding or other methods, the stator 207, the motor power line 210, the ball screw pair 3 and the inner hole of the connecting plate 206 are connected into a whole in a flat key mode and the like, and then the servo cylinder piston 208 provided with the servo cylinder leather cup 209 and the stator 207 are connected into a whole.

The servo cylinder assembly 4 has the following assembly relationship: the stator guide post 402 is connected with the stator positioning ring 403 through interference press fitting through a guide tool, the servo cylinder sealing ring 405, the servo cylinder 401 and the hydraulic integrated block 1 are fixed into a whole in a press riveting mode and the like in a synchronous mode, and finally the

components

402 and 403 and the matching shaft of the servo cylinder 401 which is subjected to press riveting are connected through the inner hole of the stator positioning ring 404 in an interference fit mode to complete assembly.

The motor assembly 2 and the servo cylinder assembly 4 are assembled: the integral assembly is accomplished by the stator guide post 402 passing through the holes with the stator 207 and the servo cylinder piston 208.

The motor angle sensor 6 and the hydraulic manifold block 1 are assembled: the motor angle sensor 6 is firmly fixed on the valve body in the modes of interference, press riveting and the like.

The assembly relationship of the motor power line 210 and the circuit board 501 is as follows: the motor power line 210 and the circuit board 501 are firmly connected with the corresponding interface of the circuit board by means of pins, welding and the like.

The motor angle sensor 6 is assembled with the circuit board 501: and the motor angle sensor 6 is reliably contacted with the corresponding characteristic of the PCB in a contact pin, spring contact and other modes.

The working principle is as follows: the outer rotor 203 drives the screw rod 301 to rotate, the screw rod 301 converts the rotation motion into the linear motion of the nut 302, the stator 207 and the servo cylinder piston 208, and therefore oil in the cylinder body of the servo cylinder 401 generates pressure and is output to a corresponding pipeline of the hydraulic manifold block 1. When the servo cylinder 401 needs to be decompressed, the nut 302 drives the stator 207 and the servo cylinder piston 208 to move towards one side close to the tail end bearing 205, and the maximum retraction displacement of the nut is limited by the connecting plate limiting block 206-1 and the nut limiting block 302-1.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A motor for an automobile brake system comprises a motor component (2) and a hydraulic manifold block (1), it is characterized in that the motor component (2) is arranged at one side of the hydraulic manifold block (1), the motor component (2) comprises a motor shell (201) and a stator (207) arranged in the center of the interior of the motor shell (201), an outer rotor (203) is arranged on the outer side of the stator (207), a ball screw pair (3) is arranged in the center of the stator (207), one end of the stator (207) is connected with a servo cylinder piston (208), the servo cylinder piston (208) is inserted into a servo cylinder assembly (4) arranged on one side of the hydraulic manifold block (1), the outer rotor (203) drives the lead screw (301) of the ball screw pair (3) to rotate together, and the nut (302) sleeved on the lead screw (301) moves linearly to drive the stator (207) and the servo cylinder piston (208) to move linearly.

2. The motor for a brake system of an automobile according to claim 1, wherein: and an electric control unit (5) is arranged on the other side of the hydraulic manifold block (1), and the electric control unit (5) is connected with the stator (207) through a motor power line (210).

3. The motor for a brake system of an automobile according to claim 2, wherein: the hydraulic integrated block (1) is provided with a motor angle sensor (6), one end of the outer rotor (203) close to the hydraulic integrated block (1) is provided with a magnetic ring (211), one end of the motor angle sensor (6) induces a magnetic signal output by the magnetic ring (211), and the other end of the motor angle sensor is connected with the electric control unit (5).

4. The motor for a brake system of an automobile according to claim 1, wherein: one end, far away from the hydraulic manifold block (1), of the outer rotor (203) is provided with a connecting plate (206), and the center of the connecting plate (206) is connected with a screw rod (301).

5. The motor for a brake system of an automobile of claim 4, wherein: the outer side of the middle part of the connecting plate (206) and the outer side of the outer rotor (203) are respectively connected with the motor shell (201) through a tail end bearing (205) and a front end bearing (202).

6. The motor for a brake system of an automobile of claim 4, wherein: one side of the central hole of the connecting plate (206) is provided with a connecting plate limiting block (206-1), and one end of the nut (302) is provided with a nut limiting block (302-1) on the same circumference as the connecting plate limiting block (206-1).

7. The motor for a brake system of an automobile according to claim 1, wherein: the servo cylinder assembly (4) is provided with a plurality of stator guide columns (402) which are axially inserted into the stator (207).

8. The motor for a brake system of an automobile of claim 7, wherein: the servo cylinder assembly (4) comprises a servo cylinder (401) connected with the hydraulic manifold block (1) and a stator positioning ring (403) arranged on the outer side of one end of the servo cylinder (401), and the stator guide column (402) is inserted into the stator positioning ring (403).

9. The motor for a brake system of an automobile of claim 8, wherein: one end of the servo cylinder (401) connected with the hydraulic manifold block (1) is a servo cylinder mounting plane (401-1), and a protruding table board (401-2) is arranged in the middle of the servo cylinder mounting plane (401-1).

10. The motor for a brake system of an automobile of claim 8, wherein: and a servo cylinder leather cup (209) which is contacted with the inner side wall of the servo cylinder (401) is arranged on the outer side of the servo cylinder piston (208).