A compact brake-by-wire power unit

Abstract

The utility model belongs to the field of vehicle brake, especially relates to a line control brake power unit of compact structure, including motor, the motor includes the casing, sets up and the stator and rotor in the casing, the casing have an open end, be equipped with the first limit step on the casing inner wall close to the open end, still include an installation partition, and the installation partition is installed in the casing and leans against the first limit step, the installation partition be used for the rotor passes through and supports the rotor, still include the sensor assembly of being connected on the installation partition, the rotor be equipped with the inductive vane cooperation with sensor assembly, and the inductive vane is with the outside of sensor assembly, the utility model discloses the sensor assembly and the integral design of installation partition, on one hand can reduce the space occupation, thereby satisfy the design requirement of power unit miniaturization, on the other hand, can complete the assembly and calibration of sensor assembly and motor before assembly assembly, need not carry out calibration on line, thereby promotes assembly assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle braking, and specifically relates to a compact brake-by-wire power unit. Background Technology

[0002] With the continuous development of vehicle electrification and intelligence, the demand for electromechanical-hydraulic servo braking systems is also increasing, among which the drive-by-wire braking power unit is the core component of the entire system.

[0003] In the existing technology, the motor and sensor are generally separate structures in the power unit structure design of the brake-by-wire system. The separate structure requires more space and is not conducive to the miniaturization design of the power unit. Furthermore, due to the separate design, assembly and calibration need to be carried out on the brake assembly line, which affects the efficiency of assembly. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model improves the line-controlled power unit by integrating the sensor assembly and the motor mounting plate into a single design. This reduces space requirements, thus meeting the miniaturization design needs of the power unit. Furthermore, it allows for the assembly and calibration of the sensor assembly and motor to be completed before assembly, eliminating the need for online calibration and improving assembly efficiency.

[0005] The technical solution of this utility model is as follows:

[0006] A compact drive-by-wire power unit includes a motor, the motor comprising a housing, a stator and a rotor disposed within the housing, characterized in that: the housing has an open end, a first limiting step is provided on the inner wall of the housing near the open end, and a mounting partition is further included, the mounting partition being installed inside the housing and abutting against the first limiting step, the mounting partition being used for the rotor to pass through and supporting the rotor, and a sensor assembly connected to the mounting partition, the rotor being provided with sensing blades that cooperate with the sensor assembly, the sensing blades being on the outer side of the sensor assembly.

[0007] Furthermore, the outer surface of the mounting partition is provided with a mounting cavity, and the sensor assembly is embedded in the mounting cavity.

[0008] Furthermore, the edge of the sensor assembly is provided with a connecting lug with a through hole, and the corresponding mounting partition is provided with a threaded connecting hole. Fasteners pass through the through hole of the connecting lug and connect with the threaded connecting hole of the mounting partition.

[0009] Furthermore, the sensor assembly is provided with a claw, and the mounting cavity of the corresponding mounting partition is provided with a slot. The claw connects to the slot to fix the sensor assembly to the mounting plate.

[0010] Furthermore, the sensor assembly and the mounting partition are integrally formed.

[0011] Furthermore, the sensing blades include a ring sleeved on the outer wall of the rotor, with multiple blades evenly distributed on the ring.

[0012] Furthermore, the sensor assembly is an eddy current position sensor.

[0013] In summary, this utility model has the following beneficial effects:

[0014] This invention improves the line-controlled power unit by integrating the sensor assembly with the motor mounting plate, achieving a unified design. This allows for the assembly of the sensor assembly and motor during motor assembly, facilitating pre-assembly and eliminating the need for assembly on the final assembly line, thus improving the assembly efficiency. Furthermore, after pre-assembly, the sensor assembly can be calibrated, reducing the process steps on the final assembly line and further improving its efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the drive-by-wire power unit of this utility model.

[0016] Figure 2 This is a schematic diagram showing a connection between the sensor assembly and the mounting partition of this utility model;

[0017] Figure 3 This is a partial cross-sectional schematic diagram of one connection method between the sensor assembly and the mounting partition of this utility model;

[0018] Figure 4 This is another schematic diagram showing the connection between the sensor assembly and the mounting partition of this utility model;

[0019] Figure 5 This is a partial cross-sectional schematic diagram showing another connection method between the sensor assembly and the mounting partition of this utility model;

[0020] Figure 6 This is a cross-sectional view of the sensor resistor and mounting partition of this utility model, which are integrally injection molded.

[0021] In the diagram, 1 represents the motor, 10 represents the housing, 11 represents the rotor, and 10 represents the rotor.

[0022] 2 is the mounting plate, 20 is the mounting cavity, 21 is the threaded connection hole, 22 is the fastener, and 201 is the bayonet.

[0023] 23 is the bearing mounting cavity, and 24 is the bearing.

[0024] 3 is the sensor assembly, 30 is the connecting ear, and 31 is the gripper.

[0025] 4 is the sensing blade, 40 is the ring body, and 41 is the blade. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0027] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0030] In existing drive-by-wire power units, the motor and sensor units are two separate units that are assembled on the power unit assembly line. Furthermore, calibration is required after assembly, which affects the production efficiency of the assembly line.

[0031] Figure 1This is a three-dimensional schematic diagram of the drive-by-wire power unit of this utility model. A compact drive-by-wire power unit includes a motor 1, which includes a housing 10, a stator, and a rotor 11 disposed within the housing 10. The housing has an open end; specifically, in this embodiment, the housing is one end open and one end closed. The open end is used for mounting various motor components, and the closed end is used to protect the motor assembly inside the housing, resulting in better overall sealing. A first limiting step 100 is provided on the inner wall of the housing 10 near the open end. It also includes a mounting partition 2, which is installed inside the housing and abuts against the first limiting step. The first limiting step 100 is used to axially position the mounting partition 2 within the housing. The mounting partition 2 is used for the rotor to pass through and support the rotor. The center of the mounting partition has a through hole for the rotor to pass through. A bearing mounting cavity 23 is provided on the mounting partition on the side away from the opening end. The bearing 24 connected to the rotor is installed in the bearing mounting cavity. The mounting partition also includes a sensor assembly 3 connected to the mounting partition. The rotor 11 is provided with sensing blades 4 that cooperate with the sensor assembly. The sensing blades are on the outside of the sensor assembly. The sensing blades cooperate with the sensor assembly to generate eddy current signals to detect the working status of the motor.

[0032] This invention improves the line-controlled power unit by integrating the sensor assembly with the motor mounting plate, achieving a unified design. This allows for the assembly of the sensor assembly and motor during motor assembly, facilitating pre-assembly and eliminating the need for assembly on the final assembly line, thus improving the assembly efficiency. Furthermore, after pre-assembly, the sensor assembly can be calibrated, reducing the process steps on the final assembly line and further improving its efficiency.

[0033] In addition, integrating the sensor assembly with the motor mounting plate reduces the space required for sensor assembly installation, thereby shortening the axial length of the motor and facilitating the miniaturization of the power unit.

[0034] To meet different design requirements, the sensor assembly of this utility model can be integrated with the mounting plate through assembly or through injection molding.

[0035] This section describes the specific structure for achieving integration through assembly; see [link / reference]. Figures 2 to 5As shown, the outer surface of the mounting partition 2 is provided with a mounting cavity 20. The outer side is the far stator side, that is, the end near the opening of the housing. The sensor assembly 3 is embedded in the mounting cavity 20. The mounting cavity matches the shape of the sensor assembly. After the sensor assembly is embedded in the mounting cavity, it forms a whole with the mounting partition and is then assembled with the motor. This realizes the positioning of the sensor assembly in the motor housing, which facilitates calibration.

[0036] To improve the reliability of the sensor assembly's fixation on the mounting plate, a locking structure is provided between the sensor assembly and the mounting plate. See [link / reference]. Figure 2 and Figure 3 As shown, the edge of the sensor assembly 3 is provided with a connecting lug 30 with a through hole, and the corresponding mounting partition 2 is provided with a threaded connecting hole 21. The fastener 22 passes through the through hole of the connecting lug and connects with the threaded connecting hole of the mounting partition. Here, the fastener locks the connecting lug and the mounting partition to achieve the fixation between the two.

[0037] Or, see Figure 4 and Figure 5 As shown, the sensor assembly 3 is provided with a claw 31, and the mounting cavity 20 of the corresponding mounting partition 2 is provided with a slot 201. The claw is connected in the slot to fix the sensor assembly and the mounting plate. The above two are integrated by assembly. The material of the mounting partition can be plastic or aluminum alloy.

[0038] This section uses a one-piece injection molded structure; see [link / reference]. Figure 6 As shown, the sensor assembly and the mounting plate are integrally molded using one-piece injection molding. This means that the eddy current circuit board portion of the sensor assembly is directly injection molded into the mounting plate, ensuring the positioning accuracy of the sensor assembly on the mounting plate, further reducing assembly steps, and lowering the manufacturing cost of the product.

[0039] The structure of the sensing blade is described below. The sensing blade 4 includes a ring 40 sleeved on the outer wall of the rotor. Multiple blades 41 are evenly distributed on the ring. Specifically, the ring is circular and sleeved on the rotor. The blades are located on the edge of one end of the ring, specifically at the end of the ring near the opening of the housing. The height of the ring allows for a certain distance between the blades and the mounting partition, thus forming a accommodating space. This facilitates the arrangement of the sensor assembly in the height direction, making the installation of the sensor assembly in the power unit more compact and occupying less space.

[0040] Furthermore, the sensor component 3 is an eddy current position sensor. Eddy current position sensors are smaller in size, making them easier to place in the power unit. They also have good detection accuracy and stability, meeting the usage requirements of the power unit's operating environment.

[0041] In summary, this utility model has the following beneficial effects:

[0042] This invention improves the line-controlled power unit by integrating the sensor assembly with the motor mounting plate, achieving a unified design. This allows for the assembly of the sensor assembly and motor during motor assembly, facilitating pre-assembly and eliminating the need for assembly on the final assembly line, thus improving the assembly efficiency. Furthermore, after pre-assembly, the sensor assembly can be calibrated, reducing the process steps on the final assembly line and further improving its efficiency.

[0043] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A compact drive-by-wire power unit, comprising a motor, the motor including a housing, a stator and a rotor disposed within the housing, characterized in that: The housing has an open end, and a first limiting step is provided on the inner wall of the housing near the open end. It also includes a mounting partition, which is installed inside the housing and abuts against the first limiting step. The mounting partition is used for the rotor to pass through and to support the rotor. It also includes a sensor assembly connected to the mounting partition. The rotor is provided with sensing blades that cooperate with the sensor assembly. The sensing blades are on the outside of the sensor assembly.

2. The compact drive-by-wire power unit according to claim 1, characterized in that: The outer surface of the mounting partition is provided with a mounting cavity, and the sensor assembly is embedded in the mounting cavity.

3. The compact drive-by-wire power unit according to claim 2, characterized in that: The sensor assembly has a connecting lug with a through hole on its edge, and a threaded connecting hole is provided on the corresponding mounting plate. Fasteners pass through the through hole of the connecting lug and connect to the threaded connecting hole of the mounting plate.

4. The compact drive-by-wire power unit according to claim 2, characterized in that: The sensor assembly is equipped with a claw, and the mounting cavity of the corresponding mounting partition is equipped with a slot. The claw connects to the slot to fix the sensor assembly to the mounting plate.

5. The compact drive-by-wire power unit according to claim 1, characterized in that: The sensor assembly and the mounting plate are integrally formed.

6. The compact drive-by-wire power unit according to claim 1, characterized in that: The induction blades include a ring sleeved on the outer wall of the rotor, with multiple blades evenly distributed on the ring.

7. The compact drive-by-wire power unit according to claim 1, characterized in that: The sensor assembly is an eddy current position sensor.

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