Miniature electric cylinder with positioning function and suitable for high temperature and low temperature

Abstract

The utility model relates to the technical field of positioning electric cylinders, in particular to a miniature electric cylinder with a positioning function and suitable for high and low temperatures, which comprises a machine body, a speed reducer is mounted on the inner wall of a cavity, a driving gear is fixedly connected to the outer wall of the speed reducer, a driven gear is meshed with the outer wall of the driving gear, and a bearing is fixedly connected to the outer wall of the driven gear. The outer wall of the bearing is fixedly connected with a main shaft, the top end of the machine body is fixedly provided with a limiting switch, through the limiting switch at the top end of the machine body, the electric cylinder is provided with a positive limiting switch and a negative limiting switch, the movement range of the electric cylinder can be accurately controlled under the DC5V driving voltage, the rated thrust of the electric cylinder reaches 50N, and the thrust requirement in a common working scene can be met; the rated pushing speed of the electric cylinder is stable 4 mm / s, the stability of linear motion is ensured, the effective stroke is set to be 20 mm, displacement control is more accurate, in addition, the electric cylinder can bear radial force as high as 20 N, and therefore the structural stability and reliability in the running process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of positioning electric cylinder technology, and in particular to a miniature electric cylinder with positioning function suitable for high and low temperatures. Background Technology

[0002] This product is used for precise positioning and locking functions. It features high integration and small size, making it easy to connect with control systems such as PLCs and control modules to achieve high-precision motion control. The electric cylinder is a modular product that integrates a servo motor and a lead screw, converting the rotary motion of the servo motor into linear motion.

[0003] Before using a miniature electric cylinder, it must first be correctly installed on the required equipment or system. During installation, attention should be paid to the positioning and fixation of the cylinder. Miniature electric cylinders usually need to be connected to a controller or actuator to achieve control and drive of the cylinder. During the connection process, it is necessary to ensure that the connection between the cylinder and other components is correct and reliable. Parameter settings for the miniature electric cylinder are then required. After completing the parameter settings, the miniature electric cylinder needs to be debugged. During the debugging process, its performance can be judged by observing indicators such as the cylinder's movement trajectory and positioning accuracy. The appropriate control method should be selected according to the actual situation.

[0004] While existing miniature electric cylinder devices can meet thrust requirements, achieve precise displacement control, and ensure structural stability in general working scenarios, their positioning accuracy may not meet the requirements in some high-precision applications. Furthermore, their performance is affected by high and low temperature environments. High ambient temperatures will reduce the motor's output capacity, while low temperatures will reduce transmission efficiency. In order to achieve dynamic sealing, it is necessary to overcome significant friction. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This solves the problem of electric cylinder movement and positioning, avoids difficulties in meeting user needs, and allows for operation in high and low temperature environments, thus improving the applicability of the device.

[0007] (II) Technical Solution

[0008] In view of the aforementioned positioning issues, this utility model is proposed.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a miniature electric cylinder with positioning function suitable for high and low temperatures, comprising a body, a cavity opened in the inner wall of the body, a reducer installed in the inner wall of the cavity, a drive gear fixedly connected to the outer wall of the reducer, a driven gear meshing with the outer wall of the drive gear, a bearing fixedly connected to the outer wall of the driven gear, a main shaft fixedly connected to the outer wall of the bearing, and a limit switch fixedly installed at the top of the body.

[0010] As a preferred embodiment of the present invention, a miniature electric cylinder with positioning function suitable for high and low temperatures, wherein: a brushed DC motor is fixedly connected to the inner wall of the cavity and fixedly connected to the outer wall of the reducer, and a motor mounting base is fixedly connected to the outer wall of the reducer and slidably connected to the outer wall of the drive gear.

[0011] As a preferred embodiment of the present invention, a miniature electric cylinder with positioning function suitable for high and low temperatures, wherein: the inner wall of the cavity is fixedly connected to a bearing mounting seat that is slidably connected to the outer wall of the bearing, and the outer wall of the bearing is fixedly connected to a lead screw integrated spindle that is fixedly connected to the outer wall of the spindle.

[0012] As a preferred embodiment of the present invention, a miniature electric cylinder with positioning function suitable for high and low temperatures, wherein: the outer wall of the integrated lead screw spindle is provided with a limit position, and the outer wall of the integrated lead screw spindle is fixedly connected with a guide sleeve that is slidably connected to the inner wall of the machine body.

[0013] As a preferred embodiment of the present invention, a miniature electric cylinder with positioning function suitable for high and low temperatures, wherein: a transmission gear is installed on the inner wall of the body, a servo motor is installed on the inner wall of the body, and an input / output motor is installed on the inner wall of the cavity in a sliding connection with the outer wall of the body.

[0014] As a preferred embodiment of the present invention, a miniature electric cylinder with positioning function suitable for high and low temperatures, wherein: a circuit board is fixedly connected to the inner wall of the cavity, a thermistor is fixedly connected to the outer wall of the circuit board, and the outer wall of the body adopts a two-wing mounting plate with two mounting holes on each side.

[0015] The beneficial effects of this utility model are:

[0016] 1. Equipped with positive and negative limit switches via limit switches on the top of the body, this electric cylinder can precisely control its movement range under a DC5V drive voltage. Its rated thrust reaches 50N, which is sufficient to meet the thrust requirements of general working scenarios. At the same time, the rated thrust speed of the electric cylinder is a stable 4mm / s, ensuring the smoothness of linear motion. The effective stroke is set at 20mm, making displacement control more precise. In addition, the electric cylinder can withstand radial forces of up to 20N, thereby ensuring structural stability and reliability during operation.

[0017] 2. This equipment adopts a straight-out cable design with a cable length of 500mm, facilitating wiring and connection operations. It is equipped with an AWG24 brushed DC motor, exhibiting a rated torque of 0.002NM and a rated speed of up to 7200rpm at room temperature. Furthermore, the integrated planetary gearbox achieves a high-efficiency reduction ratio of 21:1, maintaining an efficiency of 0.7 at room temperature. This reduction system further includes a two-stage gear transmission, with each stage having a speed ratio of 1:1 and an efficiency of up to 0.9, ensuring efficient and stable power transmission. By closely contacting a thermistor with the motor, the system monitors the motor's temperature in real time. This real-time monitoring capability allows the system to quickly respond to any abnormal temperature rise, thereby preventing motor overheating and damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the installation structure of the speed reducer of this utility model.

[0021] Figure 3 This is a schematic diagram of the thermistor mounting structure of this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Machine body; 2. Limit switch; 3. Spindle; 4. Transmission gear; 5. Servo motor; 6. Input / output motor; 7. Driven gear; 8. Bearing; 9. Bearing mounting base; 10. Limit switch; 11. Integrated lead screw spindle; 12. Guide sleeve; 13. Drive gear; 14. Motor mounting base; 15. Reducer; 16. Brushed DC motor; 17. Circuit board; 18. Thermistor. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] Reference Figure 1 and Figure 2This is the first embodiment of the present invention, which provides a miniature electric cylinder with positioning function suitable for high and low temperatures. It includes a body 1, which is made of 6 / 5 series aluminum. The inner wall of the body 1 has a cavity, and a reducer 15 is installed on the inner wall of the cavity. The reducer 15 is used to maintain high transmission efficiency and accuracy under high load conditions. A drive gear 13 is fixedly connected to the outer wall of the reducer 15. The drive gear 13 is used to drive the driven gear 7 to rotate. The driven gear 7 is meshed on the outer wall of the drive gear 13. The drive gear 13 and the driven gear are made of precision copper gears. The driven gear 7 is used to drive the main shaft 3 to rotate. A bearing 8 is fixedly connected to the outer wall of the driven gear 7. The bearing 8 is used to reduce the friction of mechanical rotation. The main shaft 3 is fixedly connected to the outer wall of the bearing 8. The main shaft 3 is made of 361 material. A limit switch 2 is fixedly installed at the top of the body 1. The limit switch 2 is used to control the rotation of the servo motor 5 and the brushed DC motor 16.

[0026] A brushed DC motor 16 is fixedly connected to the inner wall of the cavity and to the outer wall of the reducer 15. The brushed DC motor 16 is used to drive the drive gear 13 to rotate. A motor mounting base 14 is fixedly connected to the outer wall of the reducer 15 and is slidably connected to the outer wall of the drive gear 13.

[0027] The inner wall of the cavity is fixedly connected to a bearing mounting seat 9 which is slidably connected to the outer wall of the bearing 8. The outer wall of the bearing 8 is fixedly connected to a lead screw integrated spindle 11 which is fixedly connected to the outer wall of the spindle 3.

[0028] During use, the brushed DC motor 16 drives the reducer 15 to rotate. Since the brushed DC motor 16 has a rated torque of 0.002 NM and a rated speed of 7200 rpm at room temperature, the reducer 15 maintains an efficiency of 0.7 at room temperature. The reducer 15 further includes two-stage gear transmission, with a speed ratio of 1:1 for each stage and an efficiency of up to 0.9 for each stage. The reducer 15 drives the drive gear 13 to rotate, the drive gear 13 drives the driven gear 7 to rotate, and the driven gear 7 drives the main shaft 3 to rotate through the lead screw integrated main shaft 11.

[0029] Example 2

[0030] Reference Figure 1-3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the outer wall of the integrated lead screw spindle 11 is provided with a limit 10, and the outer wall of the integrated lead screw spindle 11 is fixedly connected with a guide sleeve 12 that is slidably connected to the inner wall of the machine body 1.

[0031] The inner wall of the body 1 is equipped with a transmission gear 4, a servo motor 5, and an input / output motor 6 that is slidably connected to the outer wall of the body 1 is installed on the inner wall of the cavity.

[0032] A circuit board 17 is fixedly connected to the inner wall of the cavity, and a thermistor 18 is fixedly connected to the outer wall of the circuit board 17. The thermistor 18 is manufactured and performs in accordance with Class A standards. Its standard resistance value is 100Ω at 0℃, and its resistance value changes by 3851ppm for every 1℃ change in temperature. Its insulation resistance should be no less than 100 megohms at room temperature and no less than 2 megohms at 500℃. The outer wall of the body 1 adopts a two-wing mounting plate with two mounting holes on each side.

[0033] During use, the positive and negative limit switches 2 equipped with the electric cylinder can accurately control its movement range under a DC5V drive voltage, and its rated thrust reaches 50N. The temperature of the motor is monitored in real time by the set thermistor 18, and the temperature signal is transmitted to the signal conditioning circuit. The signal conditioning circuit converts the temperature signal into a comparable signal and compares it with the set threshold. When the temperature signal exceeds the threshold, the comparator circuit outputs a high-level signal. After receiving the high-level signal, the protection execution circuit immediately cuts off the power supply to the servo motor 5 and the brushed DC motor 16 or takes other protection measures. The operation is then complete.

[0034] The remaining structure is the same as that in Example 1.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A micro electro-cylinder with positioning function and suitable for high and low temperature, characterized in that: The machine includes a body (1), the inner wall of which has a cavity, a speed reducer (15) is installed on the inner wall of the cavity, a drive gear (13) is fixedly connected to the outer wall of the speed reducer (15), a driven gear (7) meshes with the outer wall of the drive gear (13), a bearing (8) is fixedly connected to the outer wall of the driven gear (7), a main shaft (3) is fixedly connected to the outer wall of the bearing (8), a limit switch (2) is fixedly installed at the top of the machine body (1), a circuit board (17) is fixedly connected to the inner wall of the cavity, a thermistor (18) is fixedly connected to the outer wall of the circuit board (17), and the outer wall of the machine body (1) adopts a two-wing mounting plate with two mounting holes on each side. ​ 2. The micro electric cylinder with positioning function and suitable for high and low temperature according to claim 1, characterized in that: The inner wall of the cavity is fixedly connected to a brushed DC motor (16) which is fixedly connected to the outer wall of the reducer (15), and the outer wall of the reducer (15) is fixedly connected to a motor mounting base (14) which is slidably connected to the outer wall of the drive gear (13).

3. The micro electric cylinder with positioning function and suitable for high and low temperature according to claim 1, characterized in that: The inner wall of the cavity is fixedly connected to a bearing mounting seat (9) that is slidably connected to the outer wall of the bearing (8), and the outer wall of the bearing (8) is fixedly connected to a lead screw integrated spindle (11) that is fixedly connected to the outer wall of the spindle (3).

4. The micro electric cylinder with positioning function and suitable for high and low temperature according to claim 3, characterized in that: The outer wall of the integrated lead screw spindle (11) is provided with a limit (10), and the outer wall of the integrated lead screw spindle (11) is fixedly connected with a guide sleeve (12) that is slidably connected to the inner wall of the machine body (1).

5. The micro-cylinder with positioning function and suitable for high and low temperature according to claim 1, characterized in that: The inner wall of the body (1) is equipped with a transmission gear (4), the inner wall of the body (1) is equipped with a servo motor (5), and the inner wall of the cavity is equipped with an input / output motor (6) that is slidably connected to the outer wall of the body (1).

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