Miniaturized steering engine

Abstract

A miniaturized steering engine relates to the technical field of steering engines, and adopts the technical scheme that the miniaturized steering engine comprises a shell, a motor, an output shaft and a potentiometer, the output shaft is in transmission connection with the motor through a speed reducer, the potentiometer is connected with the output shaft, and the potentiometer comprises a rotating shaft, an electric brush sheet and a bottom plate; one end of the rotating shaft is in transmission connection with the output shaft, and the other end is provided with a plurality of fixing columns; the electric brush sheet comprises a connecting part, a first elastic contact and a second elastic contact; the base plate is provided with a resistor disc corresponding to the first elastic contact and a grounding electrode corresponding to the second elastic contact, the first elastic contact is electrically connected with the resistor disc, and the second elastic contact is electrically connected with the first elastic contact and the grounding electrode. The rotating shaft is directly connected with the output shaft, the connection mode of the rotating shaft and the bottom plate is improved, the overall size can be reduced, and the structures of the electric brush pieces and the bottom plate are improved.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology, and in particular to a miniaturized servo motor. Background Technology

[0002] Servo motors are widely used in robots and drones due to their small size. Patent CN215818792U discloses a servo motor that uses carbon film printing on a PCBA to form a potentiometer with a brush plate. This method of using carbon film printing on the PCBA and forming a potentiometer with a brush plate results in a simple structure, miniaturization of the servo motor, longer lifespan than traditional potentiometers, lower cost, and simpler manufacturing. However, its output teeth have an extension shaft at the lower end, and the connector has a insertion hole at the upper end. The extension shaft is inserted into the insertion hole and fixed to the connector. The lower end of the connector also has a rotating shaft that passes through the base plate and rotatably connects to the outer casing. This results in a bulky structure and still has the problem of large size. Utility Model Content

[0003] To address the issue that existing servo motors are still bulky, this invention provides a miniaturized servo motor.

[0004] This utility model provides the following technical solution: a miniaturized servo motor, including a housing, a motor, an output shaft driven by the motor via a reduction gear, and a potentiometer connected to the output shaft. The potentiometer includes a rotating shaft rotatably connected to the housing, brushes disposed on the rotating shaft, and a base plate detachably connected to the housing. One end of the rotating shaft is driven by the output shaft, and the other end is provided with multiple fixed posts. The brushes include a connecting part inserted into the fixed posts, a first elastic contact and a second elastic contact connected to the connecting part and extending towards the base plate. The base plate is provided with a resistor corresponding to the first elastic contact and a grounding electrode corresponding to the second elastic contact. The first elastic contact is electrically connected to the resistor, and the second elastic contact is electrically connected to the first elastic contact and the grounding electrode.

[0005] Preferably, the outer casing is provided with a mounting groove, the bottom of the mounting groove faces the output shaft, the bottom of the groove is provided with a through hole that is rotatably connected to the rotating shaft, a plurality of positioning posts are provided on both sides of the opening of the mounting groove, and the base plate is inserted into the positioning posts; a hemispherical protrusion is provided on the side of the rotating shaft facing the base plate, and the hemispherical protrusion is in contact with the base plate.

[0006] Preferably, the resistor has three pins electrically connected to both ends and the ground electrode.

[0007] Preferably, the brush plate includes two first elastic contacts, both ends of which are connected to the connecting portion to form a ring structure, and one first elastic contact is disposed inside the other first elastic contact.

[0008] Preferably, the brush plate includes two second elastic contacts, and the ends of the two second elastic contacts away from each other are connected to the connecting portion.

[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model eliminates the design of the extension shaft, shortens the length, directly connects the rotating shaft to the output shaft, and improves the connection method between the rotating shaft and the base plate, which helps to reduce the overall volume and improves the structure of the brush plate and the base plate. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of one embodiment of a servo motor.

[0011] Figure 2 This is a side view of one embodiment of the servo motor.

[0012] Figure 3 This is a cross-sectional view of one embodiment of a potentiometer.

[0013] Figure 4 This is an exploded view of the structure of one embodiment of a potentiometer.

[0014] Figure 5 This is a schematic diagram of one embodiment of a rotating shaft.

[0015] Figure 6 This is a side view of one embodiment of a brush plate.

[0016] Reference numerals: 10, housing; 11, mounting groove; 12, positioning post; 20, motor; 30, reduction gear; 40, output shaft; 50, potentiometer; 51, rotating shaft; 511, fixing post; 512, hemispherical protrusion; 52, brush plate; 521, connecting part; 522, first elastic contact; 523, second elastic contact; 53, base plate; 531, resistor plate; 532, grounding electrode; 533, pin. Detailed Implementation

[0017] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0018] This utility model provides a miniaturized servo motor, including a housing 10, a motor 20, an output shaft 40 connected to the motor 20 via a reduction gear 30, and a potentiometer 50 connected to the output shaft 40. The reduction gear 30 can be referred to as... Figure 2Alternatively, a multi-stage cylindrical gear can be used to reduce speed. The output shaft 40 is also equipped with transmission teeth to achieve a transmission connection with the reduction gear 30, and the output shaft 40 is rotatably connected to the housing 10.

[0019] The potentiometer 50 includes a rotating shaft 51 rotatably connected to the housing 10, a brush plate 52 disposed on the rotating shaft 51, and a base plate 53 detachably connected to the housing 10.

[0020] Please refer to Figure 3-5 The rotating shaft 51 has a transmission keyway at one end, which is inserted into the output shaft 40 for transmission connection, and two fixing posts 511 at the other end to fix the brush plate 52. The outer casing 10 has a mounting groove 11, the bottom of which faces the output shaft 40. The bottom of the groove has a through hole that is rotatably connected to the rotating shaft 51, and the rotating shaft 51 is inserted into the through hole to connect with the output shaft 40. The rotating shaft 51 has a hemispherical protrusion 512 on the side facing the base plate 53, and the hemispherical protrusion 512 contacts the base plate 53, so that the base plate 53 supports the rotating shaft 51 and reduces the contact area between the two, thus reducing wear. Compared with the prior art, this utility model eliminates the design of the extension shaft, shortens the length, directly connects the rotating shaft 51 to the output shaft 40, and improves the connection method between the rotating shaft 51 and the base plate 53, which helps to reduce the overall volume.

[0021] Please refer to Figure 4 , 6 The brush plate 52 includes a connecting portion 521 inserted into the fixing post 511, a first elastic contact 522 and a second elastic contact 523 connected to the connecting portion 521 and extending towards the base plate 53. The brush plate 52 can be made of an elastic conductive metal material; wherein, the connecting portion 521 has a connecting hole, through which it is inserted into the fixing post 511, so that the brush plate 52 rotates synchronously with the rotating shaft 51; there are two first and two second elastic contacts, both ends of the two first elastic contacts 522 are connected to the connecting portion to form a ring structure, and one first elastic contact 522 is disposed inside the other first elastic contact 522; the ends of the two second elastic contacts 523 away from each other are connected to the connecting portion 521 and are integrated with the first elastic contacts 522 to achieve electrical connection.

[0022] Please refer to Figure 1-4The base plate 53 is located on the side of the brush plate 52 facing away from the rotating shaft 51. Multiple positioning posts 12 are provided on both sides of the opening of the mounting groove 11. The base plate 53 has connecting holes and is inserted into the positioning posts 12. The side of the base plate 53 facing the brush plate 52 has a resistor 531 corresponding to the first elastic contact 522 and a grounding electrode 532 corresponding to the second elastic contact 523. Specifically, the base plate 53 can be a PCBA board; both the resistor 531 and the grounding electrode 532 can be carbon film sheets. The grounding electrode 532 is circular, and the resistor 531 extends along the circumferential direction of the grounding electrode 532. The two ends of the resistor 531 and the grounding electrode 532 are electrically connected to three pins 533 through traces within the PCBA board.

[0023] Once the base plate 53 is installed in place, its resistive element 531 and grounding electrode 532 contact the first elastic contact 522 and the second elastic contact 523, respectively, achieving electrical connection between the first elastic contact 522 and the resistive element 531, and electrical connection between the second elastic contact 523 and the grounding electrode 532. The output shaft 40 drives the brush plate 52 to rotate synchronously, causing relative rotation with the resistive element 531, thereby obtaining a resistance value or voltage that is related to the rotation angle, forming a potentiometer.

[0024] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A miniaturized steering engine comprising a housing, an electric motor, an output shaft in driving connection with the electric motor via a reduction gear, and a potentiometer connected to the output shaft, characterized in that, The potentiometer comprises a rotating shaft rotatably connected with a shell, a brush sheet arranged on the rotating shaft, and a bottom plate detachably connected with the shell; one end of the rotating shaft is drivingly connected with an output shaft, and the other end is provided with a plurality of fixing columns; the brush sheet comprises a connecting portion inserted into the fixing columns, a first elastic contact and a second elastic contact connected with the connecting portion and extending toward the bottom plate; the bottom plate is provided with a resistance sheet corresponding to the first elastic contact and a grounding electrode corresponding to the second elastic contact, the first elastic contact is electrically connected with the resistance sheet, and the second elastic contact is electrically connected with the first elastic contact and the grounding electrode.

2. The compact steering engine according to claim 1, wherein The shell is provided with a mounting groove, a groove bottom of the mounting groove faces the output shaft, the groove bottom is provided with a through hole rotatably connected with the rotating shaft, and both sides of an opening of the mounting groove are provided with a plurality of positioning columns, and the bottom plate is inserted into the positioning columns; the rotating shaft is provided with a semispherical protruding portion on a side facing the bottom plate, and the semispherical protruding portion is in contact with the bottom plate.

3. The compact steering engine according to claim 1, wherein Three pins are respectively electrically connected with both ends of the resistance sheet and the grounding electrode.

4. The compact steering engine according to claim 1, wherein The brush sheet comprises two first elastic contacts, both ends of the two first elastic contacts are connected to the connecting portion to form a ring-shaped structure, and one first elastic contact is arranged inside the other first elastic contact.

5. The compact steering engine according to claim 1, wherein The brush sheet comprises two second elastic contacts, one end of the two second elastic contacts away from each other is connected with the connecting portion.

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