A high-safety wire-controlled brake motor

Abstract

The present invention relates to the technical field of vehicle brake-by-wire motors, and in particular to a high-safety brake-by-wire motor. A first mating sleeve and a second mating sleeve are both sleeved on the power output shaft of the motor body. The first mating ring is sleeved on the second mating sleeve. The first mating ring is used for transmission cooperation with the brake actuator of the brake-by-wire system. The second mating sleeve is transmission-coordinated with the positioning rod, which extends along the axial direction of the second mating sleeve and extends outside the second mating sleeve. A position detection sensor is used for detecting the displacement of the positioning rod, and the position detection sensor is electrically connected to a processor. The processor is used to determine whether the rotation stroke control of the motor body is accurate based on the corresponding relationship between the rotation amount of the motor body and the displacement amount of the positioning rod in the self-test state. It can realize self-test of the rotation stroke accuracy according to actual needs, further improve the safety and reliability of the brake-by-wire motor, and help to further improve the driving safety of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle brake-by-wire motors, and in particular to a high-safety brake-by-wire motor. Background Art

[0002] Brake-by-wire systems are gaining increasing attention due to their significantly improved response speed, adaptability to intelligent driving, and safety redundancy. The brake-by-wire motor is a core component of the system, and its rotational travel accuracy is directly related to braking precision and safety.

[0003] At present, in order to ensure that the wire-controlled brake motor has sufficient rotational stroke accuracy, it is usually carried out through regular inspection and maintenance. This is not only labor-intensive, but also prone to inspection risk periods. If a problem occurs with the vehicle's wire-controlled brake motor within the interval between two inspections, it may cause brake failure, which poses a huge hidden danger to vehicle safety.

[0004] In view of this, this application is hereby filed. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-safety wire-controlled brake motor, which can realize self-inspection of rotational stroke accuracy according to actual needs, effectively reducing the probability of problems occurring in the wire-controlled brake motor during the interval between two inspections, further improving the safety and reliability of the wire-controlled brake motor, and helping to further improve vehicle driving safety.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A high-safety brake-by-wire motor comprises a motor body, a first matching sleeve, a second matching sleeve, a first matching ring, a position detection sensor and a processor.

[0008] Both the first and second mating sleeves are mounted on the power output shaft of the motor body, with the first mating sleeve located on the side of the second mating sleeve closest to the motor body. Along the axial direction of the power output shaft, both the first and second mating sleeves slide with the shaft and are driven by the driver. Along the circumferential direction of the shaft, both the first and second mating sleeves are fixedly engaged with the shaft.

[0009] The first mating ring is sleeved on the second mating sleeve. Along the axial direction of the second mating sleeve, the first mating ring and the second mating sleeve are slidably engaged. Along the circumferential direction of the second mating sleeve, the first mating ring and the second mating sleeve are fixedly engaged. The first mating ring is used for transmission engagement with the brake actuator of the wire control brake system.

[0010] The second matching sleeve has an annular inner cavity, which is coaxially arranged with the second matching sleeve. An annular notch communicating with the annular inner cavity is formed on one end wall of the second matching sleeve close to the first matching sleeve, and the annular notch is coaxially arranged with the second matching sleeve.

[0011] A control ring is coaxially fixedly connected to the end wall of the first mating sleeve near one end of the first mating sleeve. The control ring rotatably engages the annular notch. A drive ring is also disposed within the annular cavity. The drive ring slides within the annular cavity along the axial direction of the second mating sleeve. The drive ring is fixedly engaged with the annular cavity along the circumferential direction of the second mating sleeve. The control ring and the drive ring are threadedly engaged.

[0012] One end of the driving ring away from the first matching sleeve is fixedly connected to a positioning rod, and the positioning rod extends along the axial direction of the second matching sleeve and extends outside the second matching sleeve.

[0013] The position detection sensor is used to detect the displacement of the positioning rod, and the position detection sensor is electrically connected to the processor.

[0014] Along the axial direction of the power output shaft, the first mating sleeve and the second mating sleeve have a first mating point and a second mating point. When the first mating sleeve and the second mating sleeve are at the first mating point, both the first mating sleeve and the second mating sleeve are in driving engagement with the power output shaft, and the second mating sleeve is in driving engagement with the first mating ring, and the high-safety brake-by-wire motor is in an operating state. When the first mating sleeve and the second mating sleeve are at the second mating point, the second mating sleeve is separated from the power output shaft, and the second mating sleeve is in driving engagement with the first mating ring, and the high-safety brake-by-wire motor is in a self-testing state.

[0015] The processor is used to determine whether the rotation stroke control of the motor body is accurate according to the corresponding relationship between the rotation amount of the motor body and the displacement amount of the positioning rod in the self-test state.

[0016] Furthermore, the high-safety brake-by-wire motor further includes: a second mating ring.

[0017] The second matching ring is coaxially arranged with the first matching ring and is located on a side of the first matching ring away from the motor body. The second matching ring is used to match with the second matching sleeve.

[0018] When in the working state, the second matching sleeve is separated from the second matching ring. When in the self-test state, the second matching sleeve is matched with the second matching ring.

[0019] Among them, the second mating ring is constructed as follows: when the high-safety wire-controlled braking motor is in working condition and the motor body is in the initial state, the mating parts between the second mating sleeve and the second mating ring are aligned, so that when the driver drives the first mating sleeve and the second mating sleeve to the second mating point, the second mating sleeve can smoothly mate with the second mating ring.

[0020] Furthermore, the position detection sensor includes: a magnetostrictive displacement sensor.

[0021] The waveguide rod of the magnetostrictive displacement sensor is coaxially arranged with the second mating ring and extends into the second mating ring. A stopper is installed at the end of the waveguide rod to prevent the magnet ring of the magnetostrictive displacement sensor from falling out. The magnet ring is equipped with an elastic member to push the magnet ring toward the stopper. The outer diameter of the magnet ring is smaller than the inner diameter of the second mating ring, and the outer diameter of the stopper is smaller than the inner diameter of the second mating sleeve.

[0022] When the high-safety brake-by-wire motor is in the self-test state, the second mating sleeve pushes the magnetic ring away from the stopper. The processor determines whether the second mating sleeve has reached its designated position based on the displacement of the magnetic ring by the second mating sleeve. Furthermore, the processor determines whether the motor's rotational stroke is accurately controlled based on the correspondence between the displacement of the magnetic ring by the positioning rod and the rotation of the motor.

[0023] Furthermore, the end faces of the first matching sleeve and the second matching sleeve are spaced apart.

[0024] Furthermore, a rotational seal is formed between the control ring and the annular notch, the control ring is in contact with and rotationally sealed against an inner wall of one side of the annular cavity, a rotational seal is formed between the drive ring and the control ring, the drive ring is in contact with and slidingly sealed against an inner wall of the other side of the annular cavity, and a sliding seal is formed between the positioning rod and the second mating sleeve.

[0025] The annular inner cavity is further provided with an air supply hole, which extends from the annular inner cavity to the outer side wall of the second matching sleeve.

[0026] The second mating ring has an air supply cavity, and the inner ring wall of the second mating ring is provided with a first opening and a second opening connected to the air supply cavity. The first opening is used to connect to the air supply hole, and the second opening is distributed on the mating surface of the second mating ring for mating with the second mating sleeve.

[0027] A temperature sensor and an air pressure sensor are provided in the air supply cavity, and both the temperature sensor and the air pressure sensor are electrically connected to the processor.

[0028] When the high-safety wire-controlled brake motor is in a self-test state, the air supply hole is connected to the first opening. When the motor body rotates, the drive ring can push the gas in the annular inner cavity into the air supply inner cavity through the air supply hole and the first opening. The processor is used to determine whether there is a defect in the mating surface of the second mating sleeve used to cooperate with the second mating ring based on the rotation amount of the motor body, the detection data of the temperature sensor and the detection data of the air pressure sensor.

[0029] Furthermore, both the first mating ring and the second mating ring are mated with the second mating sleeve via a spline structure. The outer wall of the second mating sleeve is provided with spline teeth, and the inner ring walls of the first mating ring and the second mating ring are both provided with spline grooves.

[0030] The top surface of the spline teeth on the outer wall of the second mating sleeve is flat and aligns with the bottom of the spline groove on the inner wall of the second mating ring. The air supply holes are located on the top surface of the spline teeth of the second mating sleeve, the first opening is located on the bottom of the spline groove of the second mating ring, and the second opening is located on the side wall of the spline groove of the second mating ring.

[0031] Furthermore, both the first mating sleeve and the second mating sleeve are mated with the power output shaft through a spline structure.

[0032] Furthermore, an air pressure balance hole is opened on the inner wall of one end of the annular inner cavity close to the first matching sleeve, and the air pressure balance hole extends to the end surface of one end of the second matching sleeve close to the first matching sleeve.

[0033] Furthermore, the air supply inner cavity is annular and is coaxially arranged with the second matching ring. The side walls of both sides of each spline groove are provided with a second opening.

[0034] Furthermore, an arc-shaped member is provided in the air supply cavity, and the arc-shaped member is slidably fitted in the air supply cavity with damping and is slidably sealed with the inner wall of the air supply cavity.

[0035] The central angle corresponding to the arcuate member is greater than the central angle corresponding to the at least two spline grooves of the second mating ring, so that the arcuate member closes the second openings of the at least two spline grooves of the second mating ring at the same time.

[0036] There are two arc-shaped pieces, which are spaced apart and arranged on both sides of the first opening.

[0037] The sliding damping of the arc-shaped member is set to: when the driving ring pushes the gas into the gas supply cavity, the arc-shaped member is pushed when the gas pressure on the side of the arc-shaped member close to the first opening reaches the gas pressure threshold.

[0038] The beneficial effects of the technical solutions of the embodiments of the present invention include:

[0039] The high-safety wire-controlled brake motor provided by the embodiment of the present invention can realize self-inspection of rotational stroke accuracy according to actual needs, effectively reducing the probability of problems occurring in the wire-controlled brake motor during the interval between two inspections, further improving the safety and reliability of the wire-controlled brake motor, and contributing to further improving vehicle driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of the overall structure of a high-safety brake-by-wire motor provided by an embodiment of the present invention (when in operation);

[0042] Figure 2 for Figure 1 A schematic diagram of the first and second mating sleeves of a medium-to-high-safety brake-by-wire motor;

[0043] Figure 3 is a structural schematic diagram of the annular inner cavity of the second matching sleeve;

[0044] Figure 4 A schematic diagram of the overall structure of a high-safety brake-by-wire motor provided by an embodiment of the present invention (in a detection state, and before detection begins);

[0045] Figure 5 for Figure 4 A schematic diagram of the first and second mating sleeves of a medium-to-high-safety brake-by-wire motor;

[0046] Figure 6 A schematic diagram of the overall structure of a high-safety brake-by-wire motor provided by an embodiment of the present invention (after detection begins);

[0047] Figure 7 for Figure 6 A schematic diagram of the first and second mating sleeves of a medium-to-high-safety brake-by-wire motor;

[0048] Figure 8 is a schematic diagram of the cooperation between the second cooperation sleeve and the second cooperation ring;

[0049] Figure 9 is a structural schematic diagram of the second matching sleeve;

[0050] Figure 10 is a structural schematic diagram of the second mating ring;

[0051] Figure 11 This is a schematic diagram of the cooperation between the second matching sleeve and the second matching ring before the start of the test (when the arc-shaped member is provided);

[0052] Figure 12 This is a schematic diagram of the cooperation between the second matching sleeve and the second matching ring during the detection process (when the arc-shaped part is provided).

[0053] Description of reference numerals:

[0054] Motor body 100; power output shaft 110; protective shell 120; opening 121; first mating sleeve 200; control ring 210; second mating sleeve 300; annular inner cavity 310; drive ring 320; positioning rod 330; air supply hole 340; air pressure balance hole 350; first mating ring 400; second mating ring 500; air supply inner cavity 510; first opening 520; second opening 530; arc-shaped member 540; stop block 550; position detection sensor 600; waveguide rod 610; stop member 620; magnetic ring 630; tooth top surface 710; slot bottom 720; slot side wall 730. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0058] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0059] Furthermore, the terms "parallel" and "perpendicular" do not necessarily mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that the direction is more parallel than "perpendicular," not that the structure must be completely parallel, but rather that it can be slightly tilted.

[0060] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0061] In order to overcome the shortcomings of the existing technology, please refer to Figure 1-Figure 7 This embodiment provides a high-safety wire-controlled brake motor, which includes: a motor body 100, a protective shell 120, a first matching sleeve 200, a second matching sleeve 300, a first matching ring 400, a position detection sensor 600 and a processor (not shown in the figure).

[0062] It can be understood that the motor body 100 can be equipped with the required speed reduction mechanism according to actual needs.

[0063] The protective shell 120 is disposed on the outer wall of the motor body 100 , and the power output shaft 110 of the motor body 100 is located inside the protective shell 120 . The first matching sleeve 200 , the second matching sleeve 300 , the first matching ring 400 and the position detection sensor 600 are all disposed inside the protective shell 120 .

[0064] The first and second mating sleeves 200 and 300 are both sleeved on the power output shaft 110 of the motor body 100 and are coaxially arranged with the power output shaft 110. The first mating sleeve 200 is located on a side of the second mating sleeve 300 close to the motor body 100.

[0065] Along the axial direction of the power output shaft 110, the first mating sleeve 200 and the second mating sleeve 300 are both slidingly fitted with the power output shaft 110. The first mating sleeve 200 and the second mating sleeve 300 are driven by a driver (not shown in the figure) so that the first mating sleeve 200 and the second mating sleeve 300 can move along the axial direction of the power output shaft 110.

[0066] Along the circumference of the power output shaft 110 , the first matching sleeve 200 and the second matching sleeve 300 are fixedly matched with the power output shaft 110 . That is, when the power output shaft 110 rotates, it can synchronously drive the first matching sleeve 200 and the second matching sleeve 300 to rotate.

[0067] The first mating ring 400 is rotatably installed in the protective shell 120 . The first mating ring 400 and the second mating sleeve 300 are coaxially arranged. The first mating ring 400 is sleeved on the second mating sleeve 300 . The first mating ring 400 and the power output shaft 110 are spaced apart.

[0068] The first mating ring 400 is slidably engaged with the second mating sleeve 300 along the axial direction of the second mating sleeve 300. The first mating ring 400 is fixedly engaged with the second mating sleeve 300 along the circumferential direction of the second mating sleeve 300, that is, the rotation of the second mating sleeve 300 can drive the rotation of the first mating ring 400.

[0069] The protective shell 120 is provided with an opening 121 for exposing the first mating ring 400. The first mating ring 400 is used for transmission cooperation with the brake actuator of the wire control brake system. That is to say, the motor body 100 transmits power outward through the first mating ring 400, so that the actuator of the wire control brake system performs related braking operations.

[0070] The second mating sleeve 300 has an annular inner cavity 310, which is coaxial with the second mating sleeve 300. An annular notch is formed on one end of the second mating sleeve 300 near the first mating sleeve 200 and communicates with the annular inner cavity 310. The annular notch is coaxial with the second mating sleeve 300.

[0071] The first mating sleeve 200 is coaxially fixedly connected with a control ring 210 near one end wall of the first mating sleeve 200. The inner diameter of the control ring 210 is larger than the outer diameter of the power output shaft 110, and the outer diameter of the control ring 210 is smaller than the outer diameter of the second mating sleeve 300. The control ring 210 can be rotatably engaged with the annular gap and extends into the annular inner cavity 310 through the annular gap.

[0072] A drive ring 320 is also provided in the annular inner cavity 310. The drive ring 320 is slidably fitted into the annular inner cavity 310 along the axial direction of the second matching sleeve 300. The drive ring 320 is fixedly fitted into the annular inner cavity 310 along the circumferential direction of the second matching sleeve 300. The control ring 210 is threadedly fitted into the drive ring 320.

[0073] In this embodiment, the driving ring 320 is sleeved on the control ring 210. In other embodiments of the present invention, the control ring 210 may be sleeved on the driving ring 320.

[0074] Back to this embodiment, the end of the drive ring 320 away from the first mating sleeve 200 is fixedly connected to a positioning rod 330, and the positioning rod 330 extends along the axial direction of the second mating sleeve 300 and passes through the outside of the second mating sleeve 300. The positioning rod 330 can be slidably engaged with the second mating sleeve 300.

[0075] The position detection sensor 600 is used to detect the displacement of the positioning rod 330 , and the position detection sensor 600 is electrically connected to the processor.

[0076] Along the axial direction of the power output shaft 110 , the first mating sleeve 200 and the second mating sleeve 300 both have a first mating point and a second mating point.

[0077] When the first matching sleeve 200 and the second matching sleeve 300 are located at the first matching point, as shown in FIG. Figure 4 and Figure 5As shown, the power output shaft 110 extends into the second mating sleeve 300. Both the first mating sleeve 200 and the second mating sleeve 300 are in driving engagement with the power output shaft 110, and the end of the second mating sleeve 300 away from the first mating sleeve 200 is in driving engagement with the first mating ring 400. At this point, the high-safety brake-by-wire motor is in an operating state. In this state, when the power output shaft 110 of the motor body 100 rotates, it can smoothly drive the second mating sleeve 300 and the first mating sleeve 200. The second mating sleeve 300 smoothly drives the first mating ring 400, and the first mating ring 400 can then cause the actuator of the brake-by-wire system to perform the relevant braking operation.

[0078] When the first matching sleeve 200 and the second matching sleeve 300 are located at the second matching point, as shown in FIG. Figure 6 and Figure 7 As shown, the end of the power output shaft 110 moves from the second mating sleeve 300 into the first mating sleeve 200. The second mating sleeve 300 separates from the power output shaft 110, while the first mating sleeve 200 and the power output shaft 110 maintain a transmission engagement. The end of the second mating sleeve 300, which is closer to the first mating sleeve 200, is in transmission engagement with the first mating ring 400. At this point, the high-safety brake-by-wire motor is in a self-test state. In this state, when the power output shaft 110 of the motor body 100 rotates, it can only drive the first mating sleeve 200. The first mating sleeve 200 rotates relative to the second mating sleeve 300, while the second mating sleeve 300 does not rotate. At this point, the motor body 100 can be tested for rotational stroke control accuracy without affecting the operating state of the brake-by-wire system.

[0079] The switching of the first mating sleeve 200 and the second mating sleeve 300 between the first mating point position and the second mating point position is achieved by a driver.

[0080] It can be understood that the appropriate switching of the high-safety electronic control brake motor to the self-test state can be flexibly selected according to actual needs, including but not limited to after parking, turning off the engine and pulling the handbrake, or it can be triggered according to the driver's instructions in the parked and turned off state, and is not limited to this.

[0081] In the self-test state, the processor can send a braking instruction to the motor body 100 according to the preset instruction, and the motor body 100 rotates the corresponding rotation stroke (number of rotations) according to the braking instruction. During this process, the first mating sleeve 200 uses the control ring 210 to make the drive ring 320 move to the side away from the first mating sleeve 200, and the drive ring 320 pushes the positioning rod 330 further out of the second mating sleeve 300. The position detection sensor 600 can detect the change in the displacement of the positioning rod 330.

[0082] If the motor body 100's rotational stroke control is accurate, then the number of rotations specified by the braking command sent to it is the same as the number of rotations actually made by the motor body 100. In this case, the displacement of the positioning rod 330 should correspond to the number of rotations specified by the braking command. In other words, when the displacement of the positioning rod 330 corresponds to the number of rotations specified by the braking command, the motor body 100's rotational stroke control is accurate. However, when the displacement of the positioning rod 330 does not correspond to the number of rotations specified by the braking command (whether it is too large or too small), the motor body 100's rotational stroke control is inaccurate, requiring inspection and repair of the motor body 100. The processor then issues a fault alert to the user.

[0083] That is, the processor can determine whether the rotation stroke control of the motor body 100 is accurate based on the corresponding relationship between the rotation amount of the motor body 100 and the displacement amount of the positioning rod 330 in the self-test state.

[0084] In this way, the high-safety wire-controlled brake motor can perform precision self-inspection on demand without having to go to a designated maintenance station for inspection every time. At the same time, it also makes up for the defect of long intervals when going to the maintenance station for inspection, and can effectively increase the inspection frequency of the high-safety wire-controlled brake motor, fully ensuring driving safety.

[0085] In general, the high-safety wire-controlled brake motor provided in this embodiment can realize self-inspection of rotational stroke accuracy according to actual needs, effectively reducing the probability of problems occurring in the wire-controlled brake motor during the interval between two inspections, further improving the safety and reliability of the wire-controlled brake motor, and contributing to further improving vehicle driving safety.

[0086] In this embodiment, in the self-test state, when the motor body 100 is not in motion, that is, when the motor body 100 is still in the initial state, the end face of the positioning rod 330 away from the drive ring 320 is flush with the end face of the second mating sleeve 300 away from the first mating sleeve 200.

[0087] During the detection process, when the motor body 100 starts to operate, the driving ring 320 moves toward the side away from the first matching sleeve 200 , and the positioning rod 330 further extends out of the second matching sleeve 300 .

[0088] It should be noted that during the testing process, after each actuation of the motor body 100 to further drive the positioning rod 330 beyond the second mating sleeve 300, it is necessary to actuate the motor body 100 in the opposite direction (rotate the motor body 100 the same number of times in the opposite direction) to fully reset the positioning rod 330. This also allows the PTO shaft 110 and the first mating sleeve 200 to fully reset, allowing the first mating sleeve 200 and the second mating sleeve 300 to accurately and smoothly return to the first mating point. During this reset process, the position detection sensor 600 can also be used to detect the accuracy of the motor body 100's reverse rotation stroke control.

[0089] In particular, when a problem is found in the rotational stroke control accuracy of the motor body 100 during the detection process, the positioning rod 330 can be accurately reset with the help of the position detection sensor 600 during the reset, and the power output shaft 110 and the first matching sleeve 200 can be fully reset at the same time.

[0090] In this embodiment, the high-safety brake-by-wire motor further includes a second mating ring 500 .

[0091] The second mating ring 500 is fixedly installed in the protective shell 120 and is coaxially spaced apart from the first mating ring 400 and located on a side of the first mating ring 400 away from the motor body 100. The second mating ring 500 is used to mate with the second mating sleeve 300.

[0092] When in the working state, the second matching sleeve 300 is separated from the second matching ring 500. When in the self-test state, the end of the second matching sleeve 300 away from the second matching sleeve 300 extends into the second matching ring 500 and matches with the second matching ring 500.

[0093] The second matching sleeve 300 is slidably matched with the second matching ring 500 along the axial direction of the second matching ring 500. The second matching sleeve 300 is fixedly matched with the second matching ring 500 along the circumferential direction of the second matching ring 500.

[0094] Among them, the second mating ring 500 is constructed as follows: when the high-safety wire-controlled braking motor is in working condition and the motor body 100 is in the initial state (that is, when the motor body 100 is fully reset and not actuated), the mating parts between the second mating sleeve 300 and the second mating ring 500 are aligned, so that when the driver drives the first mating sleeve 200 and the second mating sleeve 300 to the second mating point, the second mating sleeve 300 can smoothly mate with the second mating ring 500.

[0095] This design allows the second mating ring 500 to detect the mating surface of the outer wall of the second mating sleeve 300. When the driver drives the first mating sleeve 200 and the second mating sleeve 300 toward the second mating point, if the second mating sleeve 300 can smoothly mate with the second mating ring 500, it means that the mating surface of the outer wall of the second mating sleeve 300 has not been deformed. If the second mating sleeve 300 cannot smoothly mate with the second mating ring 500, it means that the mating surface of the outer wall of the second mating sleeve 300 has been deformed and cannot properly mate with the second mating ring 500.

[0096] When the mating surface of the outer wall of the second mating sleeve 300 is deformed, it means that the mating surface of the inner wall of the first mating ring 400 is also likely to be deformed. At this time, the high-safety wire-controlled brake motor needs to be inspected and repaired.

[0097] The configuration of the inner ring wall of the second mating ring 500 is the same as the configuration of the inner ring wall of the first mating ring 400 .

[0098] Optionally, both the first mating sleeve 200 and the second mating sleeve 300 are mated with the power output shaft 110 through a spline structure, and both the first mating ring 400 and the second mating ring 500 are mated with the second mating sleeve 300 through a spline structure.

[0099] In this embodiment, the position detection sensor 600 may be a magnetostrictive displacement sensor, but is not limited thereto.

[0100] The magnetostrictive displacement sensor is located on a side of the second mating ring 500 away from the first mating ring 400. The waveguide rod 610 of the magnetostrictive displacement sensor is fixedly installed within the protective shell 120. The waveguide rod 610 of the magnetostrictive displacement sensor is coaxially arranged with the second mating ring 500 and extends into the second mating ring 500. A stopper 620 is provided at the end of the waveguide rod 610 to prevent the magnetic ring 630 of the magnetostrictive displacement sensor from falling out.

[0101] Along the axial direction of the waveguide rod 610, the magnetic ring 630 slidably fits within the protective housing 120. An elastic member (not shown) is attached to the magnetic ring 630. The elastic member abuts between the side of the magnetic ring 630 facing away from the first mating ring 400 and the end wall of the protective housing 120 facing away from the motor body 100. The elastic member is used to push the magnetic ring 630 toward the stopper 620. When the high-safety brake-by-wire motor is in operation, the magnetic ring 630 and the stopper 620 are in contact.

[0102] The outer diameter of the magnetic ring 630 is smaller than the inner diameter of the second matching ring 500 and larger than the inner diameter of the second matching sleeve 300 . The outer diameter of the stopper 620 is smaller than the inner diameter of the second matching sleeve 300 .

[0103] When the high-safety brake-by-wire motor is in the self-test state, the second matching sleeve 300 pushes the magnetic ring 630 to a side away from the stopper 620 .

[0104] The processor is used to determine whether the second matching sleeve 300 has moved into place based on the displacement of the magnetic ring 630 pushed by the second matching sleeve 300, that is, it can be used to determine whether the high-safety wire-controlled brake motor has correctly entered the self-test state.

[0105] When the magnetic ring 630 abuts against the second matching sleeve 300 , the positioning rod 330 also fits the surface of the magnetic ring 630 .

[0106] When testing the stroke control accuracy of the motor body 100, the extension of the positioning rod 330 will further push the magnetic ring 630 to move to the side away from the motor body 100. At this time, it is possible to judge whether the rotation stroke control of the motor body 100 is accurate based on the correspondence between the displacement of the magnetic ring 630 pushed by the positioning rod 330 and the rotation amount of the motor body 100.

[0107] That is to say, the position detection sensor 600 also has the function of detecting whether the high-safety wire-controlled brake motor has correctly entered the self-test state.

[0108] Optionally, the end faces of the first mating sleeve 200 and the second mating sleeve 300 are spaced apart from each other, which can effectively reduce mechanical wear between the first mating sleeve 200 and the second mating sleeve 300 .

[0109] Furthermore, the control ring 210 is rotationally sealed with the annular notch, the control ring 210 is fitted with the inner wall of one side of the annular cavity 310 (in the present embodiment, the control ring 210 is fitted with the inner wall of the annular cavity 310 on the side close to its central axis) and rotationally sealed, the drive ring 320 is rotationally sealed with the control ring 210, the drive ring 320 is fitted with the inner wall of the other side of the annular cavity 310 (in the present embodiment, the drive ring 320 is fitted with the inner wall of the annular cavity 310 on the side away from its central axis) and slidingly sealed, and the positioning rod 330 is slidingly sealed with the second mating sleeve 300.

[0110] The end wall of the annular inner cavity 310 away from the motor body 100 is further provided with an air supply hole 340. Figure 5 、 Figure 8 and Figure 9 As shown, the air delivery hole 340 extends from the annular inner cavity 310 to the outer wall of the second matching sleeve 300 .

[0111] The second mating ring 500 has an air delivery cavity 510, such as Figure 8 and Figure 10As shown, the inner ring wall of the second mating ring 500 is provided with a first opening 520 and a second opening 530 communicating with the air supply cavity 510. The first opening 520 is used to communicate with the air supply hole 340, and the second opening 530 is distributed on the mating surface of the second mating ring 500 for mating with the second mating sleeve 300.

[0112] Specifically, the outer wall of the second mating sleeve 300 is provided with spline teeth, and the inner ring walls of the first mating ring 400 and the second mating ring 500 are provided with spline grooves.

[0113] The top surface 710 of the spline teeth on the outer wall of the second mating sleeve 300 is flat and aligns with the bottom 720 of the spline groove on the inner wall of the second mating ring 500. The air supply hole 340 is defined in the top surface 710 of the spline teeth of the second mating sleeve 300, the first opening 520 is defined in the bottom 720 of the spline groove of the second mating ring 500, and the second opening 530 is defined in the side wall 730 of the spline groove of the second mating ring 500.

[0114] A temperature sensor (not shown in the figure) and an air pressure sensor (not shown in the figure) are provided in the air supply cavity 510 , and both the temperature sensor and the air pressure sensor are electrically connected to the processor.

[0115] When the high-safety wire-controlled brake motor is in the self-test state, the air supply hole 340 is connected to the first opening 520. When the motor body 100 rotates, the drive ring 320 can push the gas in the annular inner cavity 310 into the air supply inner cavity 510 through the air supply hole 340 and the first opening 520.

[0116] If the spline teeth of the second mating sleeve 300 and the spline grooves of the second mating ring 500 are intact, the spline teeth of the second mating sleeve 300 and the spline grooves of the second mating ring 500 will be fully aligned, the air supply hole 340 and the first opening 520 will be smoothly connected, and the second opening 530 will be successfully blocked. In this way, as the drive ring 320 moves, the air pressure in the air supply cavity 510 will continue to increase, and the air pressure value will correspond to the movement distance of the drive ring 320 (the displacement of the positioning rod 330).

[0117] If the air pressure value in the air supply cavity 510 corresponds to the movement amount of the drive ring 320, it means that the spline teeth of the second mating sleeve 300 and the spline grooves of the second mating ring 500 are fully fitted, that is, the spline teeth of the second mating sleeve 300 and the spline grooves of the second mating ring 500 are complete.

[0118] If the air pressure value in the air supply cavity 510 does not correspond to the movement distance of the drive ring 320, usually the actual air pressure value in the air supply cavity 510 is less than the air pressure value corresponding to the current movement distance of the drive ring 320, which means that air leakage has occurred at the first opening 520 and / or the second opening 530. Because the second mating ring 500 does not participate in the braking transmission, the second mating ring 500 is usually intact, which means that the spline teeth of the second mating sleeve 300 are likely to be defective.

[0119] In other words, the processor can determine whether the mating surface of the second mating sleeve 300, which mates with the second mating ring 500, is defective based on the actual rotation of the motor body 100 (or the displacement of the positioning rod 330), temperature sensor detection data, and air pressure sensor detection data. Specifically, it can determine whether the spline teeth of the second mating sleeve 300 are defective. This allows the structural integrity of the second mating sleeve 300 of a high-safety brake-by-wire motor to be tested, ensuring braking reliability.

[0120] Optionally, an air pressure balance hole 350 is opened on the inner wall of one end of the annular inner cavity 310 close to the first matching sleeve 200 , and the air pressure balance hole 350 extends to the end surface of one end of the second matching sleeve 300 close to the first matching sleeve 200 .

[0121] In this embodiment, the air supply cavity 510 is annular and is coaxially arranged with the second mating ring 500. The sidewalls 730 of each spline groove are provided with second openings 530, which ensure the comprehensive detection of the spline teeth of the second mating sleeve 300.

[0122] Further, please combine Figure 11 and Figure 12 An arc-shaped member 540 is provided in the air supply cavity 510 , and the arc-shaped member 540 is slidably fitted in the air supply cavity 510 with damping and is slidably sealed with the inner wall of the air supply cavity 510 .

[0123] The central angle of the arc 540 is greater than the central angle of the at least two spline grooves of the second mating ring 500 , so that the arc 540 closes the second openings 530 of the at least two spline grooves of the second mating ring 500 at the same time.

[0124] There are two arc-shaped members 540 , which are spaced apart and disposed on both sides of the first opening 520 .

[0125] The sliding damping of the arc-shaped member 540 is set as follows: when the driving ring 320 pushes the gas into the gas supply cavity 510, the arc-shaped member 540 is pushed when the air pressure on the side of the arc-shaped member 540 close to the first opening 520 reaches the air pressure threshold.

[0126] The air pressure threshold can be flexibly adjusted and set according to actual needs.

[0127] When the driving ring 320 pushes the gas into the gas supply cavity 510, the air pressure on the side of the arc member 540 close to the first opening 520 gradually increases. When the air pressure on the side of the arc member 540 close to the first opening 520 reaches the air pressure threshold, the arc member 540 is pushed, and both arc members 540 move away from the first opening 520, compressing the air in the area between the two arc members 540 (the area on the side of the two arc members 540 away from the first opening 520). Figure 12 As shown, until the air pressure is balanced with the air pressure on the side of the arc-shaped member 540 close to the first opening 520.

[0128] Through this design, the arc-shaped member 540 can be used to perform a pressurization-like treatment on the air in the air supply cavity 510. Since the arc-shaped member 540 exists in the air supply cavity 510, when the drive ring 320 pushes a certain amount of gas into the air supply cavity 510, the air pressure increase on the side of the arc-shaped member 540 close to the first opening 520 will be significantly increased compared to when the arc-shaped member 540 is not set. This facilitates improving the sensitivity of air pressure changes, thereby improving detection sensitivity.

[0129] After the detection is completed, the driving ring 320 is reset, and the air pressure on the side of the arc-shaped member 540 close to the first opening 520 is gradually restored, and the two arc-shaped members 540 can be separated and reset again.

[0130] In particular, if the spline teeth of the second mating sleeve 300 are defective, the two arc-shaped members 540 may not be completely reset. During the maintenance process, the arc-shaped members 540 can be reset manually.

[0131] Optionally, a stopper 550 can be fixedly disposed in the air supply lumen 510. The outer diameter of the stopper 550 is smaller than the inner diameter of the air supply lumen 510. Each curved member 540 is provided with a stopper 550 on the side closest to the first opening 121. In the initial state (i.e., before testing begins), both curved members 540 are in contact with the stopper 550. This design ensures that both curved members 540 accurately return to their respective stoppers 550 during the reset process.

[0132] Alternatively, the stop block 550 can be made of a magnetic material, and the stop block 550 can use magnetic attraction to attract the arc part 540. At this time, the arc part 540 can no longer use a damped sliding fit method, but use magnetic attraction to replace the additional damping force. With this design, when the arc part 540 is reset, when the arc part 540 enters the magnetic force range of the stop block 550, the magnetic attraction of the stop block 550 can also be used to assist the arc part 540 to quickly reset, ensuring that the arc part 540 can be accurately reset. In addition, due to the presence of magnetic attraction, the stability of the arc part 540 can be effectively ensured during the driving of the vehicle, and the position of the arc part 540 can be prevented from being offset.

[0133] To sum up, the high-safety wire-controlled brake motor provided by the embodiment of the present invention can realize self-inspection of rotational stroke accuracy according to actual needs, effectively reducing the probability of problems occurring in the wire-controlled brake motor during the interval between two inspections, further improving the safety and reliability of the wire-controlled brake motor, and helping to further improve vehicle driving safety.

[0134] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-safety brake-by-wire motor, characterized in that: include: A motor body, a first matching sleeve, a second matching sleeve, a first matching ring, a position detection sensor, and a processor; The first mating sleeve and the second mating sleeve are both sleeved on the power output shaft of the motor body, and the first mating sleeve is located on a side of the second mating sleeve close to the motor body; along the axial direction of the power output shaft, the first mating sleeve and the second mating sleeve are both slidably matched with the power output shaft and driven by the driver; along the circumferential direction of the power output shaft, the first mating sleeve and the second mating sleeve are both fixedly matched with the power output shaft; The first mating ring is sleeved on the second mating sleeve; along the axial direction of the second mating sleeve, the first mating ring and the second mating sleeve are slidably mated; along the circumferential direction of the second mating sleeve, the first mating ring and the second mating sleeve are fixedly mated; the first mating ring is used for transmission cooperation with the brake actuator of the wire control brake system; The second mating sleeve has an annular inner cavity, and the annular inner cavity is coaxially arranged with the second mating sleeve; an annular notch communicating with the annular inner cavity is formed on an end wall of the second mating sleeve close to the first mating sleeve, and the annular notch is coaxially arranged with the second mating sleeve; A control ring is coaxially fixedly connected to an end wall of the first mating sleeve adjacent to the first mating sleeve, and the control ring is rotatably engaged with the annular notch; a drive ring is further provided in the annular inner cavity; along the axial direction of the second mating sleeve, the drive ring is slidably engaged with the annular inner cavity; along the circumferential direction of the second mating sleeve, the drive ring is fixedly engaged with the annular inner cavity; the control ring is threadedly engaged with the drive ring; One end of the driving ring away from the first matching sleeve is fixedly connected to a positioning rod, and the positioning rod extends along the axial direction of the second matching sleeve and extends outside the second matching sleeve; The position detection sensor is used to detect the displacement of the positioning rod, and the position detection sensor is electrically connected to the processor; Along the axial direction of the power output shaft, the first mating sleeve and the second mating sleeve both have a first mating point and a second mating point; when the first mating sleeve and the second mating sleeve are located at the first mating point, both the first mating sleeve and the second mating sleeve are in transmission cooperation with the power output shaft, and the second mating sleeve is in transmission cooperation with the first mating ring, and the high-safety wire-controlled brake motor is in a working state; when the first mating sleeve and the second mating sleeve are located at the second mating point, the second mating sleeve is separated from the power output shaft, and the second mating sleeve is in transmission cooperation with the first mating ring, and the high-safety wire-controlled brake motor is in a self-test state; The processor is used to determine whether the rotation stroke control of the motor body is accurate according to the corresponding relationship between the rotation amount of the motor body and the displacement amount of the positioning rod in the self-test state.

2. The high-safety brake-by-wire motor according to claim 1, characterized in that: The high-safety brake-by-wire motor further includes: a second mating ring; The second mating ring is coaxially arranged with the first mating ring and is located on a side of the first mating ring away from the motor body; the second mating ring is used to cooperate with the second mating sleeve; When in the working state, the second matching sleeve is separated from the second matching ring; when in the self-test state, the second matching sleeve is matched with the second matching ring; Wherein, the second mating ring is constructed as follows: when the high-safety wire-controlled brake motor is in the working state and the motor body is in the initial state, the mating parts between the second mating sleeve and the second mating ring are aligned, so that when the driver drives the first mating sleeve and the second mating sleeve to the second mating point, the second mating sleeve can smoothly engage with the second mating ring.

3. The high-safety brake-by-wire motor according to claim 2, characterized in that: The position detection sensor includes: a magnetostrictive displacement sensor; The waveguide rod of the magnetostrictive displacement sensor is coaxially arranged with the second mating ring and extends into the second mating ring. A stopper is provided at the end of the waveguide rod to prevent the magnetic ring of the magnetostrictive displacement sensor from falling out. The magnetic ring is equipped with an elastic member to push the magnetic ring toward the side where the stopper is located. The outer diameter of the magnetic ring is smaller than the inner diameter of the second mating ring, and the outer diameter of the stopper is smaller than the inner diameter of the second mating sleeve. When the high-safety wire-controlled braking motor is in the self-test state, the second mating sleeve pushes the magnetic ring to the side away from the stop member; the processor is used to judge whether the second mating sleeve has moved into place based on the displacement of the magnetic ring pushed by the second mating sleeve, and judge whether the rotation stroke control of the motor body is accurate based on the correspondence between the displacement of the magnetic ring pushed by the positioning rod and the rotation amount of the motor body.

4. The high-safety brake-by-wire motor according to claim 2, characterized in that: The end surfaces of the first matching sleeve and the second matching sleeve are spaced apart.

5. The high-safety brake-by-wire motor according to claim 2, characterized in that: The control ring is in a rotational seal with the annular notch, the control ring is in contact with and in rotational seal with the inner wall of one side of the annular inner cavity, the drive ring is in a rotational seal with the control ring, the drive ring is in contact with and in sliding seal with the inner wall of the other side of the annular inner cavity, and the positioning rod is in a sliding seal with the second matching sleeve; The annular inner cavity is further provided with an air supply hole, and the air supply hole extends from the annular inner cavity to the outer wall of the second matching sleeve; The second mating ring has an air supply cavity, and the inner ring wall of the second mating ring is provided with a first opening and a second opening communicating with the air supply cavity; the first opening is used to communicate with the air supply hole, and the second opening is distributed on the mating surface of the second mating ring for mating with the second mating sleeve; A temperature sensor and an air pressure sensor are provided in the air supply cavity, and both the temperature sensor and the air pressure sensor are electrically connected to the processor; When the high-safety wire-controlled brake motor is in the self-test state, the air supply hole is connected to the first opening. When the motor body rotates, the drive ring can push the gas in the annular inner cavity into the air supply inner cavity through the air supply hole and the first opening. The processor is used to determine whether there is a defect in the mating surface of the second mating sleeve used to cooperate with the second mating ring based on the rotation amount of the motor body, the detection data of the temperature sensor and the detection data of the air pressure sensor.

6. The high-safety brake-by-wire motor according to claim 5, characterized in that: The first mating ring and the second mating ring are both mated with the second mating sleeve via a spline structure; the outer wall of the second mating sleeve is provided with spline teeth, and the inner ring walls of the first mating ring and the second mating ring are both provided with spline grooves; The tooth top surface of the spline teeth on the outer wall of the second mating sleeve is flat and fits with the groove bottom of the spline groove on the inner ring wall of the second mating ring; the air supply hole is opened on the tooth top surface of the spline teeth of the second mating sleeve, the first opening is opened on the groove bottom of the spline groove of the second mating ring, and the second opening is opened on the groove side wall of the spline groove of the second mating ring.

7. The high-safety brake-by-wire motor according to claim 5, characterized in that: Both the first mating sleeve and the second mating sleeve are mated with the power output shaft through a spline structure.

8. The high-safety brake-by-wire motor according to claim 5, characterized in that: An air pressure balance hole is formed on the inner wall of one end of the annular inner cavity close to the first matching sleeve, and the air pressure balance hole extends to the end surface of one end of the second matching sleeve close to the first matching sleeve.

9. The high-safety brake-by-wire motor according to claim 6, characterized in that: The air supply inner cavity is annular and is coaxially arranged with the second matching ring; the second opening is provided on both side walls of each spline groove.

10. The high-safety brake-by-wire motor according to claim 9, characterized in that: An arc-shaped member is provided in the air supply cavity, and the arc-shaped member is slidably fitted in the air supply cavity with damping and is slidably sealed with the inner wall of the air supply cavity; The central angle of the arc-shaped member is greater than the central angle of the at least two spline grooves of the second mating ring, so that the arc-shaped member can simultaneously close the second openings of the at least two spline grooves of the second mating ring; There are two arc-shaped members, which are spaced apart and disposed on both sides of the first opening; The sliding damping of the arc-shaped member is set to: when the driving ring pushes the gas into the gas supply cavity, the arc-shaped member is pushed when the gas pressure on the side of the arc-shaped member close to the first opening reaches a pressure threshold.

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