An electronically controlled brake pressure building module

Abstract

The present invention provides an electronically controlled brake pressure building module. By adopting a hollow motor design scheme, a sun gear of a planetary gear mechanism is arranged on the hollow motor rotor. The planetary carrier of the planetary gear mechanism is rigidly connected to the screw shaft. The ball screw nut moves linearly and a rotation-stopping guide structure is designed between the ball screw nut and the fixed plate. The fixed plate is also a support for one end of the motor rotor. The screw shaft and the planetary carrier serve as supports for the other end of the motor rotor. A force bearing is designed inside the motor. The force bearing is connected to the screw shaft and the planetary carrier. The force of the hydraulic reaction on the piston acts on the force bearing through the screw shaft. The planetary gear mechanism is placed at the tail end of the motor and the ball screw nut is placed inside the hollow shaft of the motor rotor. The axial dimensions of the module parts are designed to be radially superimposed, which shortens the length of the product, reduces the occupied space, has a compact structure, is light in weight, and is more conducive to the vehicle body space layout.

Description

Technical Field

[0001] The present invention relates to the field of electric control braking, and in particular to an electric control braking pressure building module. Background Art

[0002] With the development of automotive electronic technology, automotive new energy technology has made great progress. Under this background, mechatronics technology and products have been widely used in complete vehicles, among which electronic control braking products are a typical example.

[0003] The products of this type currently available on the market can be roughly divided into two categories: one is to replace the traditional vacuum booster with an electronically driven booster; the other is to integrate other electronic control systems on the basis of electronically driven pressure building. Among them, the integrated products have the advantages of lighter weight and more compact size.

[0004] The main disadvantage of the existing integrated product solution is that the axial length is large, which occupies more space and is not conducive to the body layout. Therefore, it is very necessary to solve this problem. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an electronically controlled brake pressure building module, which adopts a hollow motor design scheme, and a sun gear of a planetary gear mechanism is provided on the hollow motor rotor, the planetary carrier of the planetary gear mechanism is rigidly connected to the screw shaft, the ball screw nut moves linearly and a rotation-stopping guide structure is designed between the ball screw nut and the fixed plate, the fixed plate is also a support for one end of the motor rotor, and the screw shaft and the planetary carrier serve as supports for the other end of the motor rotor; a load bearing is designed inside the motor, and the load bearing is connected to the screw shaft and the planetary carrier, and the hydraulic reaction force on the piston acts on the load bearing through the screw shaft; the planetary gear mechanism is placed at the tail end of the motor, and the ball screw nut is placed inside the hollow shaft of the motor rotor. The axial dimensions of the module parts are designed to be radially superimposed, which shortens the length of the product, reduces the occupied space, has a compact structure, is light in weight, is more conducive to the vehicle body space layout, and solves the problems encountered in the background technology.

[0006] The object of the present invention is to provide an electronically controlled brake pressure building module, comprising a hydraulic chamber, a piston, a fixed plate, a motor stator, a motor rotor, a motor housing, an internal gear, a planetary gear, a planetary carrier, a screw shaft, a force bearing, a sun gear, a rotor core shaft, and a ball screw nut; it also comprises a planetary gear mechanism, the rotor core shaft adopts a hollow design, on which a sun gear of a planetary gear mechanism is arranged, the internal gear of the planetary gear mechanism is fixed on the motor housing, a pin shaft used for mounting the planetary gear is arranged on the planetary carrier, the inner hole of the planetary carrier is rigidly connected with the screw shaft, and the outer circle of the planetary carrier is assembled with the force bearing; the force bearing is located inside the motor housing and has a stopper in the axial direction; the rotor core shaft is rigidly connected with the motor rotor, one end of the rotor core shaft is supported by the fixed plate through a bearing, and the other end of the rotor core shaft is supported on the screw shaft and the planetary carrier through a bearing; the ball screw nut and the fixed plate are designed with a rotation-stopping guide structure; the piston is rigidly connected with the ball screw nut; the fixed plate is rigidly fixed inside the motor housing; the fixed plate is a support for one end of the motor rotor, and the screw shaft and the planetary carrier are used as supports for the other end of the motor rotor.

[0007] A further improvement is that the fixed plate is rigidly connected to the motor housing, and a stop guide groove is designed on the fixed plate to limit the rotation of the ball screw nut. When the screw shaft rotates, the ball screw nut and its outer piston are axially forceful to output the hydraulic pressure required for braking, and the side on which the piston outputs the hydraulic pressure is a hydraulic chamber.

[0008] A further improvement is that the planet carrier is rigidly connected to the screw shaft, and the torque output by the motor is amplified by the planetary gear mechanism and applied to the screw shaft, thereby driving the ball screw nut to move axially.

[0009] A further improvement is that in the planetary gear mechanism, the sun gear is rigidly connected to the rotor core shaft, and the internal gear is rigidly connected to the motor housing. For the planetary gear mechanism, the sun gear is the input end and the planet carrier is the output end.

[0010] A further improvement is that the planet carrier matches the force bearing, and during pressurized operation, the planet carrier applies the reaction force of the ball screw mechanism when establishing hydraulic pressure to the force bearing, and the force bearing is fixedly installed inside the motor housing.

[0011] Beneficial effects of the present invention: The present invention adopts a hollow motor design scheme, and the sun gear of the planetary gear mechanism is provided on the hollow motor rotor, the planetary carrier of the planetary gear mechanism is rigidly connected to the screw shaft, the ball screw nut moves linearly and is designed with a rotation-stopping guide structure between the ball screw nut and the fixed plate, the fixed plate is also a support for one end of the motor rotor, and the screw shaft and the planetary carrier serve as supports for the other end of the motor rotor; a load bearing is designed inside the motor, and the load bearing is connected to the screw shaft and the planetary carrier, and the hydraulic reaction force on the piston acts on the load bearing through the screw shaft; the planetary gear mechanism is placed at the tail end of the motor, and the ball screw nut is placed inside the hollow shaft of the motor rotor. The axial dimensions of the module parts are radially superimposed, which shortens the length of the product, reduces the occupied space, has a compact structure, is light in weight, and is more conducive to the layout of the vehicle body space. The compact structure has a smaller volume while ensuring functional performance, and is more conducive to the layout of the product on the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall cross-sectional view of the present invention.

[0013] Figure 2 It is an exploded schematic diagram of the present invention.

[0014] Figure 3 It is a schematic diagram of the anti-rotation guide structure between the ball screw nut and the fixing plate of the present invention.

[0015] Figure 4 It is a schematic diagram of the planetary gear structure of the present invention.

[0016] Figure 5 It is a schematic diagram of the planetary gear, planetary carrier and screw shaft of the present invention.

[0017] Figure 6 It is a cross-sectional view of the sun gear and the rotor core shaft of the motor of the present invention.

[0018] Among them: 1-hydraulic chamber, 2-piston, 3-fixed plate, 4-motor stator, 5-motor rotor, 6-motor housing, 7-internal gear, 8-planetary gear, 9-planetary carrier, 10-screw shaft, 11-load bearing, 12-sun gear, 13-rotor core shaft, 14-ball screw nut. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] like Figure 1-6As shown, this embodiment provides an electronically controlled brake pressure building module, including a hydraulic chamber 1, a piston 2, a fixing plate 3, a motor stator 4, a motor rotor 5, a motor housing 6, an internal gear 7, a planetary gear 8, a planetary carrier 9, a screw shaft 10, a force bearing 11, a sun gear 12, a rotor core shaft 13, and a ball screw nut 14; it also includes a planetary gear mechanism, the rotor core shaft 13 adopts a hollow design, and a sun gear 12 of the planetary gear mechanism is arranged on it, the internal gear 7 of the planetary gear mechanism is fixed on the motor housing 6, the planetary carrier 9 is provided with a pin shaft used for the planetary gear 8 for mounting the planetary gear 8, and the inner hole of the planetary carrier 9 is rigidly connected to the screw shaft 10. The outer circle of the planet carrier 9 is assembled with the load bearing 11; the load bearing 11 is located inside the motor housing 6 and has an axial stopper; the rotor core shaft 13 is rigidly connected to the motor rotor 5, one end of the rotor core shaft 13 is supported by the fixed plate 3 through a bearing, and the other end of the rotor core shaft 13 is supported on the screw shaft 10 and the planet carrier 9 through a bearing; the ball screw nut 14 and the fixed plate 3 are designed with a rotation-stopping guide structure; the piston 2 is rigidly connected to the ball screw nut 14; the fixed plate 3 is rigidly fixed inside the motor housing 6; the fixed plate 3 is a support for one end of the motor rotor 5, and the screw shaft 10 and the planet carrier 9 serve as the other end support of the motor rotor 5.

[0021] The fixing plate 3 is rigidly connected to the motor housing 6, and a stop guide groove is designed on the fixing plate 3 for limiting the rotation of the ball screw nut 14. When the screw shaft 10 rotates, the ball screw nut 14 and its outer piston 2 are axially forceful to output the hydraulic pressure required for braking, and the side of the piston 2 that outputs the hydraulic pressure is the hydraulic chamber 1.

[0022] The planet carrier 9 is rigidly connected to the screw shaft 10 , and the torque output by the motor is amplified by the planetary gear mechanism and applied to the screw shaft 10 , thereby driving the ball screw nut 14 to move axially.

[0023] In the planetary gear mechanism, the sun gear 12 is rigidly connected to the rotor core shaft 13, and the internal gear 7 is rigidly connected to the motor housing 6. For the planetary gear mechanism, the sun gear 12 is the input end, and the planet carrier 9 is the output end.

[0024] The planet carrier 9 is matched with the force bearing 11 . During pressurized operation, the planet carrier 9 applies the reaction force of the ball screw mechanism when establishing hydraulic pressure to the force bearing 11 . The force bearing 11 is fixedly installed inside the motor housing 6 .

[0025] By adopting the hollow motor design scheme, the sun gear of the planetary gear mechanism is provided on the hollow motor rotor, the planetary carrier of the planetary gear mechanism is rigidly connected to the screw shaft, the ball screw nut moves linearly and is designed with a rotation-stopping guide structure between the ball screw nut and the fixed plate, the fixed plate is also the support of one end of the motor rotor, and the screw shaft and the planetary carrier serve as the support of the other end of the motor rotor; a load bearing is designed inside the motor, the load bearing is connected to the screw shaft and the planetary carrier, and the hydraulic reaction force on the piston acts on the load bearing through the screw shaft; the planetary gear mechanism is placed at the tail end of the motor, and the ball screw nut is placed inside the hollow shaft of the motor rotor. The axial dimensions of the module parts are radially superimposed, which shortens the length of the product, reduces the occupied space, has a compact structure, is light in weight, and is more conducive to the layout of the vehicle body space. The compact structure has a smaller volume while ensuring functional performance, which is more conducive to the layout of the product on the whole vehicle.

Claims

1. An electronically controlled braking pressure building module, characterized in that: The invention comprises a hydraulic chamber (1), a piston (2), a fixing plate (3), a motor stator (4), a motor rotor (5), a motor housing (6), a planetary gear transmission mechanism, a ball screw mechanism, a load bearing (11), and a rotor core shaft (13); wherein the planetary gear transmission mechanism comprises an internal gear (7), a planetary gear (8), a planetary carrier (9), and a sun gear (12); and the ball screw mechanism comprises a screw shaft (10) and a ball screw nut (14); and the rotor core shaft (13) is hollow in design and has a planetary gear transmission mechanism thereon. The sun gear (12) of the motor housing (6) is fixed to the inner gear (7) of the planetary gear transmission mechanism on the motor housing (6). The planetary carrier (9) is provided with a pin shaft used for the planetary gear (8) for mounting the planetary gear (8). The inner hole of the planetary carrier (9) is rigidly connected to the lead screw shaft (10). The outer circle of the planetary carrier (9) is assembled with the force bearing (11). The force bearing (11) is located inside the motor housing (6) and has a stopper in the axial direction. The rotor core shaft (13) is rigidly connected to the motor rotor (5). One end of the rotor core shaft (13) is connected to the fixing plate (3). The other end of the rotor core shaft (13) is supported by a bearing on the screw shaft (10) and the planet carrier (9); the ball screw nut (14) and the fixed plate (3) are designed with a rotation-stopping guide structure; the piston (2) and the ball screw nut (14) are rigidly connected; the fixed plate (3) is rigidly fixed inside the motor housing (6); the fixed plate (3) supports one end of the motor rotor (5), and the screw shaft (10) and the planet carrier (9) serve as the other end support of the motor rotor (5); the fixed plate (3) and the motor housing (6) are rigidly connected to each other. ) is rigidly connected to the screw shaft (10), and a rotation-stopping guide groove is designed on the fixing plate (3) for limiting the rotation of the ball screw nut (14). When the screw shaft (10) rotates, the ball screw nut (14) and its outer piston (2) are axially forced to output the hydraulic pressure required for braking, and the side of the piston (2) outputting the hydraulic pressure is the hydraulic chamber (1); the planetary carrier (9) is rigidly connected to the screw shaft (10), and the torque output by the motor is amplified by the planetary gear transmission mechanism and applied to the screw shaft (10), thereby driving the ball screw nut (14) to move axially.

2. The electronically controlled brake pressure building module according to claim 1, characterized in that: In the planetary gear transmission mechanism, the sun gear (12) is rigidly connected to the rotor core shaft (13), and the internal gear (7) is rigidly connected to the motor housing (6). For the planetary gear transmission mechanism, the sun gear (12) is the input end, and the planet carrier (9) is the output end.

3. The electronically controlled brake pressure building module according to claim 2, characterized in that: The planet carrier (9) matches the force bearing (11). During pressurized operation, the planet carrier (9) applies the reaction force of the ball screw mechanism when establishing hydraulic pressure to the force bearing (11). The force bearing (11) is fixedly mounted inside the motor housing (6).

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