Miniature servo electric cylinder

Abstract

The utility model provides a miniature servo electric cylinder which comprises a base, a hollow cup motor, a reduction gear assembly, a first flange bearing, a second flange bearing, a ball screw, a flexible circuit board and Hall sensors, the Hall sensors arranged in an array are matched with strong magnets for position detection, and the absolute position of a push rod of the electric cylinder can be detected. The ball screw pair is adopted for linear transmission, the transmission efficiency is improved, the service life is prolonged, the first knuckle bearing installed on the base and the second knuckle bearing installed on the push rod can reduce the installation precision requirement of the micro servo electric cylinder, and installation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo electric equipment, in particular to a micro servo electric cylinder. Background Art

[0002] With the widespread application of electric cylinders, electric cylinders can replace hydraulic and pneumatic places. They are upgraded products of hydraulic and pneumatic equipment, all-electric multi-degree-of-freedom platforms, etc. Generally, electric cylinders have large dimensions, and position detection uses contact resistance, which has a short lifespan; position detection uses a rotary encoder, which can only detect relative position feedback. And when the linear transmission mechanism uses a trapezoidal lead screw, the transmission efficiency is low and cannot meet the application occasions of micro electric cylinders. The production efficiency of electric cylinders is low, which increases the production cost of enterprises.

[0003] The existing electric cylinder has large dimensions, short life and limited detection of relative position feedback, and the linear transmission mechanism uses a trapezoidal lead screw, which has low transmission efficiency and is inconvenient to install. Utility Model Content

[0004] The utility model provides a micro servo electric cylinder, which adopts array-arranged Hall sensors and strong magnets for position detection, can detect the absolute position of the push rod of the electric cylinder, and adopts a ball screw pair for linear transmission, thereby improving transmission efficiency and service life and improving installation convenience.

[0005] To solve the above problems, the utility model provides a micro servo electric cylinder, including a base, a hollow cup motor, a reduction gear assembly, a first flange bearing, a second flange bearing, a ball screw, a flexible circuit board and a Hall sensor. The hollow cup motor drives the reduction gear assembly to transmit the rotational motion to the ball screw. A plurality of Hall sensors are arrayed and welded on the flexible circuit board. The ball screw is installed between the first flange bearing and the second flange bearing, and the ball screw cooperates with the ball nut.

[0006] Preferably, the coreless cup motor is mounted on the base, and the base and the pedestal are sealed and fixed with a silicone gasket for sealing and protecting the reduction gear series.

[0007] The coreless cup motor is mounted on the base, and the overall structure is compact. The base and the base are sealed and fixed with a silicone gasket, which is used for sealing and protecting the reduction gear assembly, reducing failures and increasing the life of the reduction gear assembly.

[0008] Preferably, the clamping groove of the ball screw is provided with a clamping spring for limiting the axial movement of the ball screw.

[0009] Preferably, the first flange bearing and the second flange bearing are mounted on the base and are respectively connected to the first spherical bearing and the second spherical bearing.

[0010] The first flange bearing and the second flange bearing are mounted on the base and are respectively connected to the first joint bearing and the second joint bearing, thereby fixing the position of the ball screw.

[0011] Preferably, the second spherical bearing is installed at the output end of the push rod.

[0012] Preferably, the ball screw cooperates with a ball nut, the ball nut is installed on the push rod through a side threaded hole, and the installation position of the push rod can be adjusted according to actual needs.

[0013] Preferably, the ball screw nut is bonded with a strong magnet, and the strong magnet is installed and fixed opposite to the Hall sensor of the array.

[0014] The ball screw nut is bonded with a strong magnet, which is installed and fixed opposite to the Hall sensor of the array. The Hall sensors arranged in the array are used in conjunction with the strong magnet for position detection, and the absolute position of the push rod of the electric cylinder can be detected.

[0015] Preferably, part of the flexible circuit is bonded to the inner notch of the guide shell, and the remaining part is placed around the hollow cup motor.

[0016] Preferably, a guide shell is installed on the base, and the inner cavity of the guide shell is provided with a semi-cylindrical surface, which cooperates with the semi-cylindrical hole of the ball nut to limit the circular motion of the ball nut.

[0017] Preferably, a motor cover is mounted and fixed on the guide shell, and the motor cover is provided with a cable outlet.

[0018] A motor cover is fixedly mounted on the guide shell, and the motor cover is provided with a wiring outlet to facilitate the circuit wiring assembly of the electric cylinder.

[0019] The beneficial effects of the utility model are: the Hall sensors arranged in an array are welded on a flexible circuit board, and the position detection is performed in conjunction with a strong magnet, which can detect the absolute position of the push rod of the electric cylinder and is not affected by power failure. At the same time, the Hall sensors arranged in an array do not contact the strong magnet, which greatly improves the service life. The ball screw pair is used for linear transmission, which improves the transmission efficiency and service life. The first flange bearing and the second flange bearing are connected to the first joint bearing and the second joint bearing installed on the push rod, which improves the production efficiency, increases the service life of the electric cylinder, and reduces the installation requirements. It has the following advantages:

[0020] 1. The ball screw pair is used for linear transmission, which improves the transmission efficiency and service life.

[0021] 2. The array-arranged Hall sensors are used in conjunction with strong magnets for position detection, which can detect the absolute position of the push rod of the electric cylinder and is not affected by power failure. At the same time, the array-arranged Hall sensors do not contact the strong magnets, which greatly improves the service life.

[0022] 3. The first joint bearing installed on the base and the second joint bearing installed on the push rod can reduce the installation accuracy requirements of the micro servo electric cylinder and improve the convenience of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the assembly structure of an embodiment of the utility model.

[0025] Reference numerals

[0026] 1. First joint bearing; 2. Base; 3. Reduction gear assembly; 4. Circlip; 5. First flange bearing; 6. Base; 7. Guide shell; 8. Hollow cup motor; 9. Hall sensor; 10. Flexible circuit board; 11. Motor cover; 12. Second flange bearing; 13. Ball screw; 14. Ball screw nut; 15. Strong magnet; 16. Push rod; 17. Upper end cover; 18. Second joint bearing. DETAILED DESCRIPTION

[0027] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with the accompanying drawings and specific embodiments, but is not limited thereto.

[0028] like Figure 1 and Figure 2 As shown, a specific embodiment of the utility model is a micro servo electric cylinder, comprising a base 6, a hollow cup motor 8, a reduction gear assembly 3, a first flange bearing 5, a second flange bearing 12, a ball screw 13, a flexible circuit board 10 and a Hall sensor 9. The hollow cup motor 8 drives the reduction gear assembly 3 to transmit the rotational motion to the ball screw 13. A plurality of Hall sensors 9 are arranged in an array and welded on the flexible circuit board 10. The ball screw 13 is installed between the first flange bearing 5 and the second flange bearing 12, and the ball screw 13 cooperates with the ball nut 14.

[0029] Furthermore, the coreless cup motor 8 is mounted on the base 6, and the base 6 and the base 2 are sealed and fixed with a silicone gasket for sealing and protecting the reduction gear series.

[0030] The coreless cup motor 8 is mounted on the base 6 , and the overall structure is compact. The base 6 and the base 2 are sealed and fixed with a silicone gasket, which is used to seal and protect the reduction gear assembly 3 , reduce failures and increase the life of the reduction gear assembly 3 .

[0031] Furthermore, a retaining spring 4 is installed in the retaining groove of the ball screw 13 to limit the axial movement of the ball screw 13 .

[0032] Furthermore, the first flange bearing 5 and the second flange bearing 12 are mounted on the base 6 and are connected to the first spherical bearing 1 and the second spherical bearing 18 respectively.

[0033] The first flange bearing 5 and the second flange bearing 12 are mounted on the base 6 and are connected to the first spherical bearing 1 and the second spherical bearing 18 respectively, thereby fixing the position of the ball screw 13 .

[0034] Furthermore, a second spherical bearing 18 is installed at the output end of the push rod 16 .

[0035] Furthermore, the ball screw 13 cooperates with the ball nut 14 , and the ball nut 14 is installed on the push rod 16 through the side threaded hole. The installation position of the push rod 16 can be adjusted according to actual needs.

[0036] Furthermore, the ball screw nut 14 is bonded with a strong magnet 15 , and the strong magnet 15 is installed and fixed opposite to the Hall sensor 9 of the array.

[0037] The ball screw nut 14 is bonded with a strong magnet 15, which is fixedly mounted opposite to the array Hall sensors 9. The array-arranged Hall sensors 9 are used in conjunction with the strong magnet 15 for position detection, and the absolute position of the push rod 16 of the electric cylinder can be detected.

[0038] Furthermore, part of the flexible circuit is bonded to the inner notch of the guide shell 7 , and the remaining part is placed around the coreless motor 8 .

[0039] The flexible circuit board 10 is welded with electronic components to control the servo electric cylinder.

[0040] Furthermore, a guide shell 7 is installed on the base 6 , and an inner cavity of the guide shell 7 is provided with a semi-cylindrical surface, which cooperates with the semi-cylindrical hole of the ball nut 14 to limit the circular motion of the ball nut 14 .

[0041] Furthermore, a motor cover 11 is mounted and fixed on the guide shell 7, and the motor cover 11 is provided with a cable outlet.

[0042] A motor cover 11 is fixedly mounted on the guide shell 7 , and the motor cover 11 is provided with a wiring outlet to facilitate the wiring assembly of the electric cylinder.

[0043] In addition, the upper end cover 17 is installed on the upper part of the guide housing 7.

[0044] The beneficial effects of the utility model are: the Hall sensor 9 arranged in an array is welded on a flexible circuit board, and the position detection is performed in conjunction with a strong magnet 15, which can detect the absolute position of the push rod 16 of the electric cylinder, and is not affected by power failure. At the same time, the Hall sensor 9 arranged in an array does not contact the strong magnet 15, which greatly improves the service life. The ball screw 13 pair is used for linear transmission, which improves the transmission efficiency and service life. The first flange bearing 5 and the second flange bearing 12 are connected to the first joint bearing 1 and the second joint bearing 18 installed on the push rod 16, which improves the production efficiency, increases the service life of the electric cylinder, and reduces the installation requirements. It has the following advantages:

[0045] 1. Adopt 13 pairs of ball screws for linear transmission, which improves transmission efficiency and service life.

[0046] 2. The array-arranged Hall sensors 9 are used in conjunction with the strong magnets 15 for position detection, which can detect the absolute position of the push rod 16 of the electric cylinder and is not affected by power failure. At the same time, the array-arranged Hall sensors 9 are not in contact with the strong magnets 15, which greatly improves the service life.

[0047] 3. The first joint bearing 1 installed on the base 2 and the second joint bearing 18 installed on the push rod 16 can reduce the installation accuracy requirements of the micro servo electric cylinder and improve the convenience of installation.

[0048] The above description is only the preferred implementation mode of this patent and does not limit the scope of this patent. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings, directly or indirectly used in other related technical fields, falls within the scope of protection of this patent.

Claims

1. A micro servo electric cylinder, characterized in that: It includes a base, a hollow cup motor, a reduction gear assembly, a first flange bearing, a second flange bearing, a ball screw, a flexible circuit board and a Hall sensor. The hollow cup motor drives the reduction gear assembly to transmit the rotational motion to the ball screw. A plurality of Hall sensors are arranged in an array and welded on the flexible circuit board. The ball screw is installed between the first flange bearing and the second flange bearing, and the ball screw cooperates with the ball nut.

2. The micro servo electric cylinder according to claim 1, characterized in that: The coreless cup motor is mounted on the base, and the base and the pedestal are sealed and fixed with a silicone gasket for sealing and protecting the reduction gear series.

3. The micro servo electric cylinder according to claim 1, characterized in that: The clamping groove of the ball screw is provided with a clamping spring for limiting the axial movement of the ball screw.

4. The micro servo electric cylinder according to claim 1, characterized in that: The first flange bearing and the second flange bearing are mounted on the base and are connected to the first spherical bearing and the second spherical bearing respectively.

5. The micro servo electric cylinder according to claim 4, characterized in that: The second spherical bearing is installed at the output end of the push rod.

6. The micro servo electric cylinder according to claim 5, characterized in that: The push rod is installed through the side threaded hole of the ball screw nut, and the installation position of the push rod can be adjusted according to actual needs.

7. The micro servo electric cylinder according to claim 1, characterized in that: The ball screw nut is bonded with a strong magnet, and the strong magnet is installed and fixed opposite to the Hall sensor of the array.

8. The micro servo electric cylinder according to claim 1, characterized in that: Part of the flexible circuit is bonded to the inner notch of the guide shell, and the remaining part is placed around the hollow cup motor.

9. The micro servo electric cylinder according to claim 1, characterized in that: A guide shell is installed on the base, and the inner cavity of the guide shell is provided with a semi-cylindrical surface, which cooperates with the semi-cylindrical hole of the ball screw nut and is used to limit the circular motion of the ball screw nut.

10. The micro servo electric cylinder according to claim 9, characterized in that: A motor cover is mounted and fixed on the guide shell, and the motor cover is provided with a cable outlet.

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