Double-output-shaft electric actuator

Abstract

The utility model discloses a double-output-shaft electric actuator which comprises a rear end cover, encoders are connected to the two sides of one end of an inner cavity of the rear end cover, a lead screw penetrates through the middle of the rear end cover, a rotor is connected to the outer side of the lead screw, and an encoder is connected to the outer side of the end, close to the rear end cover, of the rotor. The end, close to the rear end cover, of the encoder is connected with an encoder supporting seat, the end, away from the rear end cover, of the encoder supporting seat is provided with a locking nut, the end, away from the encoder supporting seat, of the locking nut is connected with a bearing seat, and the end, close to the rotor, of the bearing seat is connected with a tapered roller bearing. The end, close to the rotor, of the rear end cover is connected with a cylinder barrel, the inner side of the cylinder barrel is connected with a stator, one end of the lead screw is used for exerting force, the other end of the lead screw is used for pulling force, the rotation action is not stopped, then the nut and the rotor are integrated, transmission is more direct, in this way, bidirectional force exerting can be achieved when an electric cylinder structure piston is used, and the working efficiency of the actuator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically to a double-output shaft electric actuator. Background Art

[0002] A dual-shaft electric actuator refers to an electric motor that uses a special structure inside to convert electromagnetic energy directly into mechanical rotational energy and output it outward through two shafts. Compared with traditional motors, dual-shaft motors have more output shafts, which can effectively improve the output power and efficiency of the motor. There are two main types of dual-shaft motors. One uses a dual-rotor structure to convert the input energy of the motor into two independent rotational motions and output them outward through two output shafts. The other uses a dual conversion component structure to convert the input energy of the motor into mechanical energy and hydraulic energy respectively, and output them outward through two output shafts. However, the electric cylinder structure piston-type output of the electric actuator currently used on the market can only be in one direction, which reduces the working efficiency of the motor. Utility Model Content

[0003] The purpose of the present invention is to provide a double-shaft electric actuator to solve the problems raised in the above background technology.

[0004] The double-shaft electric actuator includes a rear end cover, encoders are connected on both sides of one end of the inner cavity of the rear end cover, a screw rod passes through the middle part of the rear end cover, the outer side of the screw rod is connected to the rotor, the outer side of the end of the rotor close to the rear end cover is connected to the encoder, and the end of the encoder close to the rear end cover is connected to the encoder support seat. The rotor refers to a rotating body supported by bearings. Objects such as optical disks that do not have their own rotating shaft can be regarded as a rotor when it adopts a rigid connection or an additional shaft.

[0005] Preferably, a locking nut is provided at one end of the encoder support seat away from the rear end cover, and the end of the locking nut away from the encoder support seat is connected to a bearing seat.

[0006] Preferably, a tapered roller bearing is connected to one end of the bearing seat close to the rotor, and a cylinder is connected to one end of the rear end cover close to the rotor, a stator is connected to the inner side of the cylinder, and a front end cover is connected to one end of the cylinder away from the rear end cover. The stator is the stationary part of the motor or generator, and the stator consists of three parts: a stator core, a stator winding and a base. The stator is used to generate a rotating magnetic field.

[0007] Preferably, the end of the stator away from the tapered roller bearing is connected to a secondary bearing seat, the end of the encoder close to the outside of the rear end cover is connected to an encoder line aviation plug, and the outer surface of the cylinder is connected to a power line aviation plug.

[0008] Preferably, a magnet is connected to the outer surface of the rotor, and the rear end cover, encoder, tapered roller bearing, cylinder, stator, front end cover, screw, secondary bearing seat, rotor, bearing seat, locking nut, encoder support seat, encoder line aviation plug and power line aviation plug together constitute a dual-output shaft electric actuator.

[0009] Preferably, the rotor is fixed on the surface of the bearing seat through a tapered roller bearing, the rear end cover supports the rear end shaft of the screw rod, and the screw rod passes through the rotor, the front end cover and the rear end cover.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] 1) In the present invention, one end of the screw rod is used for output and the other end is used for pulling, and the rotation action is continued. Then, the nut and the rotor are integrated to make the transmission more direct. This allows the piston of the electric cylinder structure to output force in both directions and improves the working efficiency of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the overall split structure of the utility model.

[0014] Explanation of the numbers in the figure: 1. Rear end cover; 2. Encoder; 3. Tapered roller bearing; 4. Cylinder; 5. Stator; 6. Front end cover; 7. Screw; 8. Secondary bearing seat; 9. Rotor; 10. Bearing seat; 11. Locking nut; 12. Encoder support seat; 13. Encoder line aviation plug; 14. Power line aviation plug. DETAILED DESCRIPTION

[0015] Example: See Figure 1-2, double-output shaft electric actuator, including a rear end cover 1, encoders 2 are connected on both sides of one end of the inner cavity of the rear end cover 1, a screw rod 7 passes through the middle part of the rear end cover 1, the outer side of the screw rod 7 is connected to the rotor 9, the outer side of the end of the rotor 9 close to the rear end cover 1 is connected to the encoder 2, the end of the encoder 2 close to the rear end cover 1 is connected to the encoder support seat 12, the encoder 2 is a device that compiles and converts signals or data into signal forms that can be used for communication, transmission and storage, the encoder 2 converts angular displacement or linear displacement into electrical signals, the former is called a code disk, and the latter is called a code scale. According to the readout method, the encoder 2 can be divided into contact and non-contact types; according to the working principle, the encoder 2 can be divided into incremental and absolute types; the incremental encoder 2 converts displacement into a periodic electrical signal, and then converts this electrical signal into a counting pulse, and the number of pulses is used to represent the size of the displacement; each position of the absolute encoder 2 corresponds to a certain digital code, so its indication is only related to the starting and ending positions of the measurement, but not to the intermediate process of the measurement.

[0016] See also Figure 1-2 A locking nut 11 is provided at one end of the encoder support seat 12 away from the rear end cover 1 , and a bearing seat 10 is connected to one end of the locking nut 11 away from the encoder support seat 12 .

[0017] See also Figure 1-2 , the end of the bearing seat 10 close to the rotor 9 is connected to the tapered roller bearing 3, and the end of the rear end cover 1 close to the rotor 9 is connected to the cylinder 4, the inner side of the cylinder 4 is connected to the stator 5, and the end of the cylinder 4 away from the rear end cover 1 is connected to the front end cover 6. The tapered roller bearing 3 is a separable bearing. The inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into different structural types such as single-row, double-row and four-row tapered roller shafts 3 according to the number of rows of rollers installed. The single-row tapered roller bearing 3 can withstand radial loads and unidirectional axial loads. When the bearing is subjected to radial loads, an axial component force will be generated, so another bearing that can withstand the axial force in the opposite direction is needed to balance it.

[0018] See also Figure 1-2 The end of the stator 5 away from the tapered roller bearing 3 is connected to the secondary bearing seat 8, the end of the encoder 2 close to the outside of the rear end cover 1 is connected to the encoder line aviation plug 13, and the outer surface of the cylinder 4 is connected to the power line aviation plug 14.

[0019] See also Figure 1-2 The outer surface of the rotor 9 is connected with a magnet. The rear end cover 1, encoder 2, tapered roller bearing 3, cylinder 4, stator 5, front end cover 6, screw 7, secondary bearing seat 8, rotor 9, bearing seat 10, locking nut 11, encoder support seat 12, encoder line aviation plug 13 and power line aviation plug 14 together constitute a dual-output shaft electric actuator.

[0020] See also Figure 1-2 The rotor 9 is fixed on the surface of the bearing seat 10 through the tapered roller bearing 3. The rear end cover 1 supports the rear end shaft of the screw rod 7. The screw rod 7 passes through the rotor 9, the front end cover 6 and the rear end cover 1.

[0021] Working principle: First, install the stator 5 into the cylinder 4, then stick a magnet on the outside of the rotor 9, and install the rotor 9 in the inner cavity of the stator 5. At this time, the inner cavity of the rotor 9 serves as the raceway of the screw rod 7, which can make the screw rod 7 rotate in the rotor 9. Then, the rotor 9 is fixed to the bearing seat 10 through the tapered roller bearing 3 and fixed by the lock nut 11. The deep groove ball bearing in the front cover 6 is supported, and then the encoder 2 is connected to the rotor 9. At the same time, the rear end cover 1 is used as a support for the rear end shaft of the screw rod 7, and the power line aerial plug 14 provides power to the electric cylinder, and the encoder line aerial plug 13 receives position information.

[0022] The electric cylinder is powered by the power line aviation plug 14, and the electromagnetic energy is directly converted into mechanical rotational energy, and then the screw rod 7 is driven to rotate in the inner cavity of the rotor 9, so that one end of the screw rod 7 outputs force and the other end pulls force, and the rotation action continues. Then, through the integration of the nut and the rotor 9, the transmission is more direct.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-shaft electric actuator, comprising a rear end cover (1), characterized in that: Encoders (2) are connected to both sides of one end of the inner cavity of the rear end cover (1), a screw rod (7) passes through the middle part of the rear end cover (1), a rotor (9) is connected to the outside of the screw rod (7), an encoder (2) is connected to the outside of one end of the rotor (9) close to the rear end cover (1), and an encoder support seat (12) is connected to one end of the encoder (2) close to the rear end cover (1).

2. The double-shaft electric actuator according to claim 1, characterized in that: A locking nut (11) is provided at one end of the encoder support seat (12) away from the rear end cover (1), and a bearing seat (10) is connected to one end of the locking nut (11) away from the encoder support seat (12).

3. The double-shaft electric actuator according to claim 2, characterized in that: The end of the bearing seat (10) close to the rotor (9) is connected to a tapered roller bearing (3), and the end of the rear end cover (1) close to the rotor (9) is connected to a cylinder (4), the inner side of the cylinder (4) is connected to a stator (5), and the end of the cylinder (4) away from the rear end cover (1) is connected to a front end cover (6).

4. The double-shaft electric actuator according to claim 3, characterized in that: The end of the stator (5) away from the tapered roller bearing (3) is connected to a secondary bearing seat (8), the end of the encoder (2) close to the outside of the rear end cover (1) is connected to an encoder line aviation plug (13), and the outer surface of the cylinder (4) is connected to a power line aviation plug (14).

5. The double-shaft electric actuator according to claim 4, characterized in that: The outer surface of the rotor (9) is connected to a magnet, and the rear end cover (1), the encoder (2), the tapered roller bearing (3), the cylinder (4), the stator (5), the front end cover (6), the screw (7), the secondary bearing seat (8), the rotor (9), the bearing seat (10), the locking nut (11), the encoder support seat (12), the encoder line aviation plug (13) and the power line aviation plug (14) together constitute a double-output shaft electric actuator.

6. The double-shaft electric actuator according to claim 5, characterized in that: The rotor (9) is fixed on the surface of the bearing seat (10) through a tapered roller bearing (3), and the rear end cover (1) supports the rear end shaft of the screw rod (7). The screw rod (7) passes through the rotor (9), the front end cover (6) and the rear end cover (1).

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