A ratchet and pawl type EPS self-locking mechanism motor

Abstract

The utility model discloses a ratchet pawl type EPS self-locking mechanism motor, including a self-locking mechanism installed on a motor body, the self-locking mechanism including a ratchet body and a pawl assembly, the ratchet body is fixed to the output end of the motor body, the pawl assembly includes a pawl body, a rotating rod, a torsion spring and a mounting groove, the rotating rod is fixed to one side of the motor body, and the pawl body is movably connected to the outer wall of the rotating rod, and the mounting groove is provided on the surface of the pawl body, the torsion spring is sleeved on the outer wall of the rotating rod, and the two ends of the torsion spring respectively abut against the inner walls on both sides of the mounting groove, and one end of the pawl body is connected to a magnetic drive member. The utility model is provided with an electromagnet so that when its magnetic poles are opposite to those of a permanent magnet, the permanent magnet is adsorbed and fixed, so that when the mounting seat and the output shaft rotate, the ratchet body and the pawl body are separated from each other, ensuring that the ratchet body and the pawl body are in a separated state during the rotation of the mounting seat and the output shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a ratchet pawl type EPS self-locking mechanism motor. Background Art

[0002] In the prior art, EPS motor is a power steering system that directly relies on the motor to provide auxiliary torque. Compared with the traditional hydraulic power steering system (HPS), EPS system has many advantages, such as saving energy and protecting the environment. The working principle of EPS motor is to determine the magnitude and direction of steering assistance through the microcomputer control unit according to the signals transmitted by the steering sensor device and the vehicle speed sensor;

[0003] The output shaft of the existing EPS motor needs to be self-locked after power is cut off. The purpose of self-locking is to ensure the stability of the output shaft and prevent the output shaft from moving. The current self-locking mechanism for the EPS motor is usually controlled and driven by a ratchet and pawl mechanism. The ratchet and pawl mechanism has the characteristics of preventing reversal and one-way driving. Therefore, the present application proposes an EPS self-locking mechanism motor, which realizes self-locking of the EPS motor output shaft through the ratchet and pawl mechanism to prevent the motor output shaft from reversing. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a ratchet pawl type EPS self-locking mechanism motor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ratchet pawl type EPS self-locking mechanism motor comprises a self-locking mechanism installed on a motor body, the self-locking mechanism comprises a ratchet body and a pawl assembly, the ratchet body is fixed to the output end of the motor body, the pawl assembly comprises a pawl body, a rotating rod, a torsion spring and a mounting groove, the rotating rod is fixed to one side of the motor body, and the pawl body is movably connected to the circumferential outer wall of the rotating rod, and the mounting groove is provided on the surface of the pawl body, the torsion spring is sleeved on the outer wall of the rotating rod, and one end of the pawl body is connected to a magnetic drive component.

[0007] As a further solution of the utility model: the motor body includes an EPS motor body, a mounting seat and an output shaft, the output shaft is movably connected to the end of the EPS motor body, the mounting seat is welded to one end of the output shaft, and the ratchet body is connected to the circumferential outer wall of the output shaft by a key.

[0008] As a further solution of the utility model: the magnetic drive component includes a mounting shell, support one and support two, and a telescopic component is movably connected between the inner wall of support two and the inner wall of support one, and an electromagnet is fixed to the inner wall of one side of the telescopic component.

[0009] As a further solution of the utility model: the installation shell is fixed to the end of the EPS motor body, and the support one is welded to the inner wall of the circumference of the installation shell, and the support two is fixed to the outer wall of one side of the pawl body.

[0010] As a further solution of the utility model: the telescopic part includes a sliding rod and a rotating seat, the rotating seat is movably connected to the second inner wall of the support, and the sliding rod is fixed to the outer wall of one side of the rotating seat, and the outer wall of the sliding rod is movably connected to a shielding tube, and the shielding tube is movably connected to an inner wall of the support.

[0011] As a further solution of the utility model: a permanent magnet is fixed to one end of the slide bar, and the permanent magnet and the electromagnet are used in coordination.

[0012] As a further solution of the utility model: a mounting plate is welded to the circumferential outer wall of the mounting shell, and a mounting hole is opened on the surface of the mounting plate.

[0013] As a further solution of the utility model: a cover plate is fixed to the circumferential inner wall of the mounting shell.

[0014] Compared with the prior art, the utility model provides a ratchet pawl type EPS self-locking mechanism motor, which has the following beneficial effects:

[0015] 1. By providing an electromagnet so that its magnetic poles are opposite to those of the permanent magnet, the permanent magnet is adsorbed and fixed, so that when the mounting seat and the output shaft rotate, the ratchet body and the pawl body are separated from each other, ensuring that the ratchet body and the pawl body are in a separated state during the rotation of the mounting seat and the output shaft.

[0016] 2. When the electromagnet is powered off, the pawl body moves to the outer wall of the ratchet body under the action of the rebound force of the torsion spring, so that the pawl body is used to limit the ratchet body in one direction.

[0017] 3. When the magnetic pole direction of the electromagnet is adjusted to repel each other with the permanent magnet, the ratchet body and the pawl body fit tightly together, so that the ratchet body is limited and self-locked in both clockwise and counterclockwise directions relative to the pawl body.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a ratchet pawl type EPS self-locking mechanism motor proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a ratchet pawl type EPS self-locking mechanism motor proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the installation structure of a self-locking mechanism of a ratchet pawl type EPS self-locking mechanism motor proposed by the utility model;

[0022] Figure 4 This is a schematic diagram of the main structure of a self-locking mechanism of a ratchet pawl type EPS self-locking mechanism motor proposed in the utility model;

[0023] Figure 5 The utility model provides a schematic diagram of the pawl installation structure of a ratchet pawl type EPS self-locking mechanism motor.

[0024] In the figure: EPS motor body 1, mounting shell 2, mounting plate 3, mounting hole 4, cover plate 5, mounting seat 6, ratchet body 7, pawl body 8, support one 9, output shaft 10, electromagnet 11, shielding tube 12, permanent magnet 13, slide rod 14, rotating seat 15, support two 16, rotating rod 17, torsion spring 18, mounting groove 19. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1:

[0028] A ratchet pawl type EPS self-locking mechanism motor, in order to achieve the self-locking of the motor, such as Figures 1 to 5 As shown, it includes a self-locking mechanism installed on the motor body, the self-locking mechanism includes a ratchet body 7 and a pawl assembly, the ratchet body 7 is fixed to the output end of the motor body, the pawl assembly includes a pawl body 8, a rotating rod 17, a torsion spring 18 and a mounting groove 19, the rotating rod 17 is fixed to one side of the motor body by screws, and the pawl body 8 is rotatably connected to the circumferential outer wall of the rotating rod 17, and the mounting groove 19 is opened on the surface of the pawl body 8, the torsion spring 18 is sleeved on the outer wall of the rotating rod 17, and the two ends of the torsion spring 18 are respectively against the inner walls on both sides of the mounting groove 19, and one end of the pawl body 8 is connected to a magnetic drive member;

[0029] When the output end of the motor body needs to be self-locked after power is cut off, the elastic force of the torsion spring 18 is used to limit the pawl body 8 to the ratchet body 7, thereby limiting the rotation of the ratchet body 7 after the output end of the motor body is powered off, thereby achieving self-locking of the output end of the motor body;

[0030] By connecting the magnetic drive component and the pawl body 8, when the output end of the motor body rotates, the magnetic force generated by the magnetic drive component is used to adsorb the pawl body 8, so that the pawl body 8 and the ratchet body 7 are separated, so that when the output end of the motor body is rotating, the pawl body 8 and the ratchet body 7 are temporarily separated. When the output end of the motor body needs to be self-locking, the magnetic drive component no longer drives the pawl body 8 to be adsorbed, so that the pawl body 8 moves to the outer wall of the ratchet body 7 under the action of the rebound force of the torsion spring 18, and the ratchet body 7 is self-locked by the pawl body 8.

[0031] Further, the motor body includes an EPS motor body 1, a mounting seat 6 and an output shaft 10, wherein the output shaft 10 is rotatably connected to the end of the EPS motor body 1, and the mounting seat 6 is welded to one end of the output shaft 10, and the ratchet body 7 is connected to the circumferential outer wall of the output shaft 10 through a key;

[0032] The EPS motor body 1 is provided to drive the output shaft 10 to rotate after power is supplied, and the mounting seat 6 can be used to connect with the driven component;

[0033] Further, the magnetic drive member includes a mounting shell 2, a support 1 9 and a support 2 16, the mounting shell 2 is fixed to the end of the EPS motor body 1 by screws, and the support 1 9 is welded to the inner wall of the circumference of the mounting shell 2, the support 2 16 is fixed to the outer wall of one side of the pawl body 8 by screws, and a telescopic member is rotatably connected between the inner wall of the support 2 16 and the inner wall of the support 1 9, and an electromagnet 11 is fixed to the inner wall of one side of the telescopic member by screws;

[0034] An electromagnet 11 is provided to drive the telescopic part to retract after being energized. After the telescopic part is retracted, the pawl body 8 is pulled by the retracted telescopic part, so that the pawl body 8 and the ratchet body 7 are disengaged. When the electromagnet 11 is powered off, the telescopic part is reset under the pulling action of the rebound force of the torsion spring 18, so that the pawl body 8 self-locks the ratchet body 7.

[0035] Further, the telescopic member includes a slide bar 14 and a rotating seat 15, the rotating seat 15 is rotatably connected to the inner wall of the support 16, and the slide bar 14 is fixed to the outer wall of one side of the rotating seat 15 by screws, and the outer wall of the slide bar 14 is slidably connected to the shielding cylinder 12, and the shielding cylinder 12 is rotatably connected to the inner wall of the support 1 9, and one end of the slide bar 14 is fixed with a permanent magnet 13 by screws, and the permanent magnet 13 and the electromagnet 11 are used in conjunction with each other;

[0036] After being energized, the electromagnet 11 attracts the permanent magnet 13, causing the slide bar 14 to retract along the shielding tube 12. After being energized, the electromagnet 11 causes the slide bar 14 to reset under the action of the resilience of the torsion spring 18. Since the pawl body 8 can only self-lock the ratchet body 7 in one direction, when the ratchet body 7 needs to be self-locked in both clockwise and counterclockwise directions, the magnetic pole direction of the electromagnet 11 is changed so that the magnetic poles of the electromagnet 11 and the permanent magnet 13 repel each other after being the same, so that the pawl body 8 is tightly pressed against the surface of the ratchet body 7 under the action of the magnetic force of the electromagnet 11, and the ratchet body 7 is pressed by the pawl body 8, so that the ratchet body 7 is limited and self-locked in both clockwise and counterclockwise directions.

[0037] Furthermore, a cover plate 5 is fixed to the inner circumferential wall of the installation shell 2 by screws, and a mounting plate 3 is welded to the outer circumferential wall of the installation shell 2, and a mounting hole 4 is opened on the surface of the mounting plate 3;

[0038] By providing the mounting holes 4 and the mounting plate 3 , the mounting housing 2 and structural members such as the bracket can be fixedly connected by bolts.

[0039] Working principle: When in use, the mounting plate 3 and the mounting hole 4 are connected through bolts and brackets and other structural parts. When in use, the EPS motor body 1 is started, so that the EPS motor body 1 drives the mounting seat 6 and the output shaft 10 to rotate, and at this time, the electromagnet 11 is energized so that the magnetic poles between the electromagnet 11 and the permanent magnet 13 are opposite, and the permanent magnet 13 is adsorbed and fixed by the electromagnet 11, so that the pawl body 8 and the ratchet body 7 are separated. When the EPS motor body 1 needs to be self-locked after the output shaft 10 is powered off, the electromagnet 11 is powered off at this time, so that the pawl body 8 moves to contact the outer wall of the ratchet body 7 under the action of the rebound force of the torsion spring 18, and the ratchet body 7 is locked in one direction by the pawl body 8. When the ratchet body 7 needs to be locked in two directions, the magnetic pole direction of the electromagnet 11 is changed at this time so that the magnetic poles between the electromagnet 11 and the permanent magnet 13 repel each other, thereby ensuring that the pawl body 8 and the ratchet body 7 are tightly fitted, and ensuring the stability of the pawl body 8 relative to the ratchet body 7.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ratchet pawl type EPS self-locking mechanism motor, comprising a self-locking mechanism installed on a motor body, characterized in that: The self-locking mechanism comprises a ratchet body (7) and a pawl assembly, wherein the ratchet body (7) is fixed to the output end of the motor body, and the pawl assembly comprises a pawl body (8), a rotating rod (17), a torsion spring (18) and a mounting groove (19), wherein the rotating rod (17) is fixed to one side of the motor body, and the pawl body (8) is movably connected to the circumferential outer wall of the rotating rod (17), and the mounting groove (19) is provided on the surface of the pawl body (8), the torsion spring (18) is sleeved on the outer wall of the rotating rod (17), and one end of the pawl body (8) is connected to a magnetic drive member.

2. A ratchet pawl type EPS self-locking mechanism motor according to claim 1, characterized in that: The motor body comprises an EPS motor body (1), a mounting seat (6) and an output shaft (10); the output shaft (10) is movably connected to the end of the EPS motor body (1), the mounting seat (6) is welded to one end of the output shaft (10), and the ratchet body (7) is connected to the circumferential outer wall of the output shaft (10) via a key.

3. A ratchet pawl type EPS self-locking mechanism motor according to claim 2, characterized in that: The magnetic drive component comprises a mounting shell (2), a support 1 (9) and a support 2 (16), and a telescopic component is movably connected between the inner wall of the support 2 (16) and the inner wall of the support 1 (9), and an electromagnet (11) is fixed to the inner wall of one side of the telescopic component.

4. A ratchet pawl type EPS self-locking mechanism motor according to claim 3, characterized in that: The mounting shell (2) is fixed to the end of the EPS motor body (1), and the first support (9) is welded to the inner circumferential wall of the mounting shell (2), and the second support (16) is fixed to the outer wall of one side of the pawl body (8).

5. A ratchet pawl type EPS self-locking mechanism motor according to claim 4, characterized in that: The telescopic member comprises a slide bar (14) and a rotating seat (15), wherein the rotating seat (15) is movably connected to the inner wall of the second support (16), and the slide bar (14) is fixed to the outer wall of one side of the rotating seat (15), and the outer wall of the slide bar (14) is movably connected to a shielding tube (12), and the shielding tube (12) is movably connected to the inner wall of the first support (9).

6. A ratchet pawl type EPS self-locking mechanism motor according to claim 5, characterized in that: A permanent magnet (13) is fixed to one end of the sliding rod (14), and the permanent magnet (13) and the electromagnet (11) are used in coordination with each other.

7. A ratchet pawl type EPS self-locking mechanism motor according to claim 6, characterized in that: A mounting plate (3) is welded to the circumferential outer wall of the mounting shell (2), and a mounting hole (4) is provided on the surface of the mounting plate (3).

8. A ratchet pawl type EPS self-locking mechanism motor according to claim 7, characterized in that: A cover plate (5) is fixed to the circumferential inner wall of the installation shell (2).

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