Linear steering engine

Abstract

The utility model relates to a linear steering engine which comprises an upper cover (1), a middle shell (2) and a lower shell (3), and the upper cover (1) is fixedly connected with the upper end of the middle shell (2) through a screw (11); the lower shell (3) is fixedly connected with the lower end of the middle shell (2) through a screw (11), a motor (21), an ejector rod (22), a potentiometer (23) and a circuit board (24) are arranged in the middle shell (2), the ejector rod (22) is matched with the potentiometer (23), a sliding handle of the potentiometer is driven to move up and down in the up-down moving process of the ejector rod (22), and therefore position information of the ejector rod is obtained through resistance changes of the potentiometer, and the position information of the circuit board (24) is obtained. And servo control of the steering engine is realized by matching with a circuit board on a robot transmission device base.

Description

Technical Field

[0001] This utility model belongs to the field of robot accessory technology, specifically relating to a linear servo motor. Background Technology

[0002] Servo motors are the primary power source for remote-controlled models and humanoid robots, and also crucial actuators for the movement of the model's base. In existing technologies, the space in the model's base is limited, placing high demands on the internal servo motors; ordinary servo motors often fail to meet these requirements.

[0003] For example, Chinese utility model patent CN 204354142U discloses a restaurant beverage service robot, including a rotating head, a body movably connected to the head, hands movably connected to the body, a bottom movably connected to the body, and a terminal control device. The bottom includes a chassis, servo motors, a contact-type automatic charging device located on the side of the chassis, two obstacle avoidance sensors, three wheel drive motors, one omnidirectional wheel and two drive wheels located on the bottom of the chassis. The servo motors and wheel drive motors are located inside the chassis. The chassis adopts a seamless integrated structure. However, its internal space is relatively large, and the robot's movement is achieved by setting multiple drive motors, omnidirectional wheels, and drive wheels, so the requirements for the servo motors are not high. Utility Model Content

[0004] To overcome the defects and shortcomings of the prior art, this utility model provides a linear servo motor, which solves the problem that the existing technology cannot provide power to the base for servo linear motion in a narrow space, while making the most of the space.

[0005] To achieve the above objectives, the technical solution of this utility model is: a linear servo motor, which includes an upper cover, a middle shell, and a lower shell. The upper cover is fixedly connected to the upper end of the middle shell by screws; the lower shell is fixedly connected to the lower end of the middle shell by screws. The middle shell contains a motor, a push rod, a potentiometer, and a circuit board. The push rod works in conjunction with the potentiometer. During the up-and-down movement of the push rod, it drives the potentiometer slider to move up and down, thereby obtaining the position information of the push rod by utilizing the change in the resistance value of the potentiometer. This, in conjunction with the circuit board on the base of the robot transmission device, enables servo control of the servo motor.

[0006] Preferably, the push rod has a screw nut inside; the lower housing has a gear set, and the power of the motor is converted into the linear motion of the push rod through gear transmission and screw transmission.

[0007] In any of the above embodiments, it is preferred that the push rod has a groove on its side; the potentiometer has a sliding handle on its side wall, and the groove on the push rod is interference-fitted with the sliding handle on the potentiometer. During the up-and-down movement of the push rod, the sliding handle of the potentiometer moves up and down, thereby obtaining the position information of the push rod by utilizing the change in the resistance of the potentiometer, and realizing the servo control of the servo motor in conjunction with the circuit board on the base.

[0008] In any of the above embodiments, it is preferred that the gear set includes a primary gear, a secondary gear, and motor teeth, wherein the shaft hole of the primary gear is clearance-fitted with the primary shaft; the secondary gear is integrally formed with the lead screw inside the push rod; and the motor teeth are interference-fitted with the shaft at the lower end of the motor.

[0009] In any of the above embodiments, it is preferred that the motor teeth mesh with the large teeth of the primary gear; and the small teeth of the primary gear mesh with the secondary gear.

[0010] In any of the above embodiments, it is preferred that the upper and lower ends of the secondary gear are provided with bearings, the upper bearing is engaged with the shaft hole inside the middle shell, and the lower bearing is engaged with the shaft hole inside the lower shell, so that the gear set can operate smoothly inside the middle shell.

[0011] In any of the above embodiments, it is preferred that the bearing is an oil-impregnated bearing, and the bearing is clearance-fitted with the secondary gear.

[0012] In summary, the linear servo of this invention has the following advantages: a lead screw nut is provided inside the push rod; a gear set is provided in the lower housing, and the power of the motor is converted into the linear motion of the push rod through gear transmission and lead screw transmission; a groove is opened on the side of the push rod; a sliding handle is provided on the side wall of the potentiometer, and the groove on the push rod and the sliding handle on the potentiometer are interference-fitted. During the up-and-down movement of the push rod, the sliding handle of the potentiometer is driven to move up and down, thereby obtaining the position information of the push rod by utilizing the change in the resistance value of the potentiometer, and realizing the servo control of the servo in conjunction with the circuit board on the base. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a preferred embodiment of the linear servo according to the present invention.

[0014] Figure 2 For the linear servo according to this utility model Figure 1 A split diagram of the preferred embodiment is shown.

[0015] Figure 3 For the linear servo according to this utility model Figure 1 The diagram shows a preferred embodiment of the structure in which the push rod and the potentiometer work together.

[0016] The following are the component names listed: Top cover 1, Screw 11, Middle shell 2, Motor 21, Top rod 22, Slot 221, Thread nut 222, Potentiometer 23, Slide handle 231, Circuit board 24, Lower shell 3, First-stage gear 31, Second-stage gear 32, Motor gear 33, First-stage shaft 34, Lead screw 35, Bearing 36. Detailed Implementation

[0017] The following description is merely exemplary and not intended to limit this disclosure, its application, or its uses. The specific embodiments of the servo mechanism of this utility model are further described below with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2 The diagram shows a preferred embodiment of the linear servo motor of this invention. The linear servo motor includes an upper cover 1, a middle shell 2, and a lower shell 3. The upper cover 1 is fixedly connected to the upper end of the middle shell 2 by screws 11; the lower shell 3 is fixedly connected to the lower end of the middle shell 2 by screws 11. The middle shell 2 contains a motor 21, a push rod 22, a potentiometer 23, and a circuit board 24. The push rod 22 works in conjunction with the potentiometer 23. During the up-and-down movement of the push rod 22, it drives the potentiometer slider to move up and down, thereby obtaining the position information of the push rod by utilizing the change in the potentiometer's resistance. This, combined with the circuit board on the robot transmission device base, enables servo control of the servo motor.

[0019] The linear servo motor of this invention operates as follows: When the robot base sends a position command to the servo motor, the servo motor 21 rotates in the direction of the command sent by the base. This causes the motor teeth 33 to drive the large teeth of the first-stage gear 31 to rotate, and the small teeth of the first-stage gear 31 to drive the second-stage gear 32 to rotate. The second-stage gear 32 and the lead screw 35 are integrally formed. The lead screw 35 rotates accordingly, causing the push rod 22 to move up and down. During the up and down movement of the push rod 22, the potentiometer 23 moves up and down. The main board then forms a position closed loop based on the signal from the potentiometer 23, thereby controlling the servo motor to perform precise servo motion.

[0020] In this embodiment, the push rod 22 is provided with a screw nut 222 inside; the lower shell 3 is provided with a gear set, and the power of the motor 21 is converted into the linear motion of the push rod 22 through gear transmission and screw transmission.

[0021] In this embodiment, the gear set includes a primary gear 31, a secondary gear 32, and a motor gear 33. The shaft hole of the primary gear 31 is clearance-fitted with the primary shaft 34; the secondary gear 32 is integrally formed with the lead screw 35 inside the push rod 22; and the motor gear 33 is interference-fitted with the shaft at the lower end of the motor 21.

[0022] In this embodiment, the motor tooth 33 meshes with the large tooth of the first-stage gear 31; the small tooth of the first-stage gear 31 meshes with the second-stage gear 32.

[0023] In this embodiment, the upper and lower ends of the secondary gear 32 are provided with bearings 36. The upper bearing is engaged with the shaft hole inside the middle shell 2; the lower bearing is engaged with the shaft hole inside the lower shell 3, so that the gear set can operate smoothly inside the middle shell.

[0024] In this embodiment, the bearing 36 is an oil-impregnated bearing, and the bearing 36 is clearance-fitted with the secondary gear 35.

[0025] See Figure 3 As shown, the linear servo according to this utility model Figure 1 The diagram shows a preferred embodiment of the structure in which the push rod and the potentiometer work together.

[0026] In this embodiment, the push rod 22 has a slot 221 on its side; the potentiometer 23 has a slide 231 on its side wall. The slot 221 on the push rod 22 and the slide 231 on the potentiometer 23 are interference-fitted. During the up-and-down movement of the push rod 22, the slide 231 of the potentiometer 23 is driven to move up and down. Thus, the position information of the push rod is obtained by using the resistance change of the potentiometer 23, and the servo control of the servo motor is realized in conjunction with the circuit board on the base.

[0027] It will be readily understood by those skilled in the art that the linear servo of this invention comprises any combination of the parts described in this specification. Due to space limitations and for the sake of brevity, these combinations are not described in detail here, but after reading this specification, the scope of this invention, consisting of any combination of the parts constituted in this specification, is self-evident.

Claims

1. A linear servo, comprising an upper cover (1), a middle shell (2), and a lower shell (3), wherein the upper cover (1) is fixedly connected to the upper end of the middle shell (2) by screws (11); and the lower shell (3) is fixedly connected to the lower end of the middle shell (2) by screws (11), characterized in that: The middle shell (2) contains a motor (21), a push rod (22), a potentiometer (23) and a circuit board (24), with the push rod (22) cooperating with the potentiometer (23).

2. The linear servo as described in claim 1, characterized in that: The top rod (22) is equipped with a nut (222) inside; the lower shell (3) is equipped with a gear set.

3. The linear servo as described in claim 1 or 2, characterized in that: The push rod (22) has a groove (221) on its side; the potentiometer (23) has a slide (231) on its side wall, and the groove (221) on the push rod (22) and the slide (231) on the potentiometer (23) are interference fit.

4. The linear servo as described in claim 2, characterized in that: The gear set includes a primary gear (31), a secondary gear (32), and a motor gear (33). The shaft hole of the primary gear (31) is clearance-fitted with the primary shaft (34). The secondary gear (32) is integrally formed with the lead screw (35) inside the push rod (22). The motor gear (33) is interference-fitted with the shaft at the lower end of the motor (21).

5. The linear servo as described in claim 4, characterized in that: The motor tooth (33) meshes with the large tooth of the first-stage gear (31); the small tooth of the first-stage gear (31) meshes with the second-stage gear (32).

6. The linear servo as described in claim 4, characterized in that: The upper and lower ends of the secondary gear (32) are provided with bearings (36). The upper bearing is engaged with the shaft hole inside the middle shell (2); the lower bearing is engaged with the shaft hole inside the lower shell (3).

7. The linear servo as described in claim 4, characterized in that: The bearing (36) is an oil-impregnated bearing, and the bearing (36) is clearance-fitted with the secondary gear (32).

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