Ball sleeve micro servo electric cylinder

Abstract

The utility model provides a ball sleeve micro servo electric cylinder which comprises a base, a gear motor, a first guide rod, a second guide rod, a first knuckle bearing, a ball short rod, a ball sleeve, a strong magnet, a connector, a second knuckle bearing, a flexible circuit board and Hall sensors. The absolute position of the roller sleeve of the electric cylinder can be detected, the ball sleeve pair is adopted for linear transmission, the transmission efficiency is improved, the service life is prolonged, and the installation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo electric equipment, in particular to a ball sleeve 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, inconvenient installation, short life, and cannot accurately detect the exact position of the electric cylinder. Utility Model Content

[0004] The utility model provides a ball sleeve micro servo electric cylinder, which adopts array-arranged Hall sensors and strong magnets for position detection, can detect the absolute position of the roller sleeve of the electric cylinder, and adopts a ball sleeve 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 ball sleeve micro servo electric cylinder, including a base, a reduction motor, a first guide rod, a second guide rod, a first joint bearing, a ball short rod, a ball sleeve, a strong magnet, a joint, a second joint bearing, a flexible circuit board and a Hall sensor. The reduction motor and the first guide rod and the second guide rod are fixedly mounted on the base, the ball short rod is fixed on the output shaft of the reduction motor, a plurality of Hall sensors are arrayed and welded on the flexible circuit board, the second joint bearing is installed and connected with a joint, and the base is fixed on the base.

[0006] Preferably, the base is provided with two guide rod mounting holes and a reduction motor mounting hole, for respectively fixing and mounting the first guide rod, the second guide rod and the reduction motor.

[0007] Preferably, a ball return channel is provided inside the ball short rod, and ball return devices are installed at both ends of the ball short rod.

[0008] A ball return channel is provided inside the ball short rod, and ball return devices are installed at both ends. The ball enters the ball return device from one end of the outer spiral raceway of the ball short rod, and returns to the other end of the outer spiral raceway of the ball short rod through the ball return channel and the ball return device at the other end, so that the ball circulates and reduces the friction resistance between the ball short rod and the ball sleeve.

[0009] Preferably, the ball sleeve forms a spiral transmission pair with the ball short rod through the balls, and the ball sleeve is provided with two guide holes cooperating with the first guide rod and the second guide rod for limiting the circular motion of the ball sleeve.

[0010] The ball sleeve forms a spiral transmission pair through the ball and the ball short rod. At the same time, two guide holes are provided on the ball sleeve to cooperate with the first guide rod and the second guide rod to limit the circular motion of the ball sleeve, play a role in limiting the motion of the first guide rod and the second guide rod, and will not deviate from the radial motion position.

[0011] Preferably, the connector is installed at the output end of the ball sleeve, and the installation position can be adjusted according to actual conditions.

[0012] Preferably, the ball sleeve is bonded with a strong magnet, and the strong magnet is installed and fixed opposite to the Hall sensor of the array.

[0013] The ball sleeve 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 ball sleeve of the electric cylinder can be detected.

[0014] Preferably, the flexible circuit board portion of the Hall sensor array is bonded to the mounting groove on the inner side of the base, and the remaining portion is mounted in the cavity of the base.

[0015] Preferably, the flexible circuit board is welded with electronic components for controlling the servo electric cylinder.

[0016] Preferably, the base is provided with the first joint bearing in connection therewith, and has a cavity inside for accommodating the control circuit.

[0017] 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:

[0018] 1. The ball sleeve pair is used for linear transmission, which improves the transmission efficiency and service life.

[0019] 2. The array-arranged Hall sensors are used in conjunction with strong magnets for position detection, which can detect the absolute position of the ball sleeve 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.

[0020] 3. The first joint bearing is installed on the base, and the second joint bearing is connected and installed on the joint, which can reduce the installation accuracy requirements of the micro servo electric cylinder and improve the convenience of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the assembly structure of an embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of the assembly structure of the ball short rod according to an embodiment of the utility model.

[0024] Reference numerals

[0025] 1. First joint bearing; 2. Base; 3. Base; 4. Reducer motor; 5. Flexible circuit board; 6. Hall sensor; 7. First guide rod; 8. Second guide rod; 9. Strong magnet; 10. Ball short rod; 11. Ball; 12. Ball return device; 13. Ball sleeve; 14. Second joint bearing; 15. Joint; 16. Ball return channel; 17. External spiral raceway. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figure 1 and Figure 2 As shown, a specific embodiment of the utility model is a ball sleeve micro servo electric cylinder, comprising a base 3, a reduction motor 4, a first guide rod 7, a second guide rod 8, a first joint bearing 1, a ball short rod 10, a ball sleeve 13, a strong magnet 9, a joint 15, a second joint bearing 14, a flexible circuit board 5 and a Hall sensor 6. The reduction motor 4 and the first guide rod 7 and the second guide rod 8 are fixedly mounted on the base 3, the ball short rod 10 is fixed on the output shaft of the reduction motor 4, a plurality of Hall sensors 6 are arranged in an array and welded on the flexible circuit board 5, the second joint bearing 14 is installed and connected with a joint 15, and the base 3 is fixed on the base 2.

[0028] Furthermore, the base 3 is provided with two guide rod mounting holes and a reduction motor 4 mounting hole, for respectively fixing the first guide rod 7 , the second guide rod 8 and the reduction motor 4 .

[0029] Furthermore, a ball return channel 16 is provided inside the ball short rod 10, and ball return devices 12 are installed at both ends of the ball short rod.

[0030] A ball return channel 16 is provided inside the ball short rod 10, and ball return devices 12 are installed at both ends. The ball 11 enters the ball return device 12 from one end of the outer spiral raceway 17 of the ball short rod 10, and returns to the other end of the outer spiral raceway 17 of the ball short rod 10 through the ball return channel 16 and the ball return device 12 at the other end, so that the ball 11 circulates, reducing the friction resistance between the ball short rod 10 and the ball sleeve 13.

[0031] Furthermore, the ball sleeve 13 forms a spiral transmission pair with the ball short rod 10 through the ball 11 , and two guide holes are provided on the ball sleeve 13 to cooperate with the first guide rod 7 and the second guide rod 8 to limit the circular motion of the ball sleeve 13 .

[0032] The ball sleeve 13 forms a spiral transmission pair through the ball and the ball short rod 10. At the same time, two guide holes are provided on the ball sleeve 13 to cooperate with the first guide rod 7 and the second guide rod 8 to limit the circular motion of the ball sleeve 13, play a role in limiting the movement of the first guide rod 7 and the second guide rod 8, and will not deviate from the radial motion position.

[0033] Furthermore, a joint 15 is installed at the output end of the ball sleeve 13, and the installation position can be adjusted according to actual conditions.

[0034] Furthermore, a strong magnet 9 is bonded to the ball sleeve 13 , and the strong magnet 9 is installed and fixed opposite to the Hall sensor 6 of the array.

[0035] The ball sleeve 13 is bonded with a strong magnet 9, which is fixedly mounted opposite to the array Hall sensor 6. The array-arranged Hall sensor 6 is used in conjunction with the strong magnet 9 for position detection, and the absolute position of the ball sleeve 13 of the electric cylinder can be detected.

[0036] Furthermore, part of the flexible circuit board 5 of the Hall sensor 6 array is bonded to the mounting groove on the inner side of the base 2 , and the remaining part is installed in the cavity of the base 2 .

[0037] Furthermore, the flexible circuit board 5 is welded with electronic components for controlling the servo electric cylinder.

[0038] Furthermore, the base 2 is provided with a first joint bearing 1 and is provided with a cavity inside for placing a control circuit.

[0039] The beneficial effects of the utility model are: the Hall sensor 6 arranged in an array is welded on a flexible circuit board, and the position detection is performed in conjunction with a strong magnet 9, 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 sensor 6 arranged in an array does not contact the strong magnet 9, 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 1 and the second joint bearing 14 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:

[0040] 1. The ball sleeve pair is used for linear transmission, which improves the transmission efficiency and service life.

[0041] 2. The array-arranged Hall sensors 6 are used in conjunction with the strong magnets 9 for position detection, which can detect the absolute position of the ball sleeve 13 of the electric cylinder and is not affected by power failure. At the same time, the array-arranged Hall sensors 6 are not in contact with the strong magnets 9, which greatly improves the service life.

[0042] 3. The first joint bearing 1 is installed on the base 2, and the second joint bearing 14 is connected and installed on the joint 15, which can reduce the installation accuracy requirements of the micro servo electric cylinder and improve the convenience of installation.

[0043] 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 ball sleeve micro servo electric cylinder, characterized in that: It includes a base, a reduction motor, a first guide rod, a second guide rod, a first joint bearing, a ball short rod, a ball sleeve, a strong magnet, a joint, a second joint bearing, a flexible circuit board and a Hall sensor. The reduction motor and the first guide rod and the second guide rod are fixedly installed on the base, the ball short rod is fixed on the output shaft of the reduction motor, a plurality of Hall sensors are arrayed and welded on the flexible circuit board, the second joint bearing is installed and connected with a joint, and the base is fixed on the base.

2. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The base is provided with two guide rod mounting holes and a reduction motor mounting hole, for respectively fixing and mounting the first guide rod, the second guide rod and the reduction motor.

3. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: A ball return channel is arranged inside the ball short rod, and ball return devices are installed at both ends of the ball short rod.

4. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The ball sleeve forms a spiral transmission pair with the ball short rod through the balls, and two guide holes are arranged on the ball sleeve to cooperate with the first guide rod and the second guide rod to limit the circular motion of the ball sleeve.

5. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The output end of the ball sleeve is installed with the joint, and the installation position can be adjusted according to actual conditions.

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

7. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The flexible circuit board portion of the Hall sensor array is bonded to the mounting groove on the inner side of the base, and the remaining portion is mounted in the cavity of the base.

8. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The flexible circuit board is welded with electronic components and is used to control the servo electric cylinder.

9. The ball sleeve micro servo electric cylinder according to claim 1, characterized in that: The base is connected with the first joint bearing and has a cavity inside for accommodating a control circuit.

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