Integrated ball screw servo motor

Abstract

The utility model discloses an integrated ball screw servo motor, which comprises a ball screw shaft, a ball nut, an oil seal, a shell, a bearing, a stator iron core, a rotor iron core, a rear end cover, an adjusting nut, an encoder, a magnet, a locking nut, a hollow shaft and an encoder rear cover, meanwhile, the hollow shaft is fixedly installed in the rotor iron core and sleeved with the stator iron core, the ball screw shaft is sleeved with the hollow shaft, the locking nut is arranged at the rear end of the hollow shaft to fix and lock the ball screw shaft, the lead screw and the motor rotor are fixedly installed and integrated through the structure, the coaxiality of the motor rotor and the lead screw is improved, various influences caused by eccentricity are reduced, and the service life of the motor is prolonged. And the screw rod is fixed through the hollow shaft and the locking nut, so that the screw rod can be quickly replaced, the screw rod can be conveniently disassembled and replaced, the efficiency is increased, the structural space for fixing the screw rod is saved, the structure is improved and simplified, the machining process and the assembly time are reduced, the operation stability is good, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an integrated ball screw servo motor. Background Art

[0002] Motor is a common power source with a wide range of applications, usually including multiple types, such as stepper motors, servo motors, etc., which can convert voltage signals into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator to convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. At present, if the servo motor wants to achieve linear motion, it generally uses a belt pulley or a screw module. The motor shaft needs to be equipped with a coupling and connected to the screw module. The rotational motion is converted into linear motion along the axis of the screw, thereby driving the linear feed of the workbench installed on the nut.

[0003] The connection method of connecting the screw module and the motor through a coupling is relatively complicated, and the assembly is time-consuming, which reduces the assembly efficiency. If the motor screw is not assembled carefully, concentricity deviation is likely to occur, affecting the transmission accuracy of the motor. In addition, the internal structure of the current servo motor is complex, resulting in high manufacturing costs. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to provide an integrated ball screw servo motor to solve the existing defects. (II) Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an integrated ball screw servo motor, including a ball screw shaft, a ball nut, an oil seal, a housing, a bearing, a stator core, a rotor core, a rear end cover, an adjusting nut, an encoder, a magnet, a locking nut, a hollow shaft, and an encoder rear cover. The stator core is fixedly provided inside the housing, and the hollow shaft is fixedly installed in the rotor core and sleeved on the stator core. The ball screw shaft is sleeved in the hollow shaft, and a locking nut is provided at the rear end of the hollow shaft to fix and lock the ball screw shaft.

[0008] Preferably, bearings are fixedly mounted on the front and rear sides of the hollow shaft respectively, a rear end cover is fixedly mounted on the rear side of the housing, and an adjusting nut is arranged inside the rear end cover.

[0009] Preferably, the magnet is installed at the tail end of the ball screw shaft and is sleeved in the encoder and the encoder rear cover.

[0010] Preferably, an encoder is fixedly connected to the other side of the rear end cover, and an encoder rear cover is fixedly connected to the other side of the rear end cover, and the encoder is located in the internal space formed by the encoder rear cover and the rear end cover.

[0011] Preferably, a ball nut is cooperatively connected to the ball screw shaft, and an oil seal is installed on the front side of the housing.

[0012] (III) Beneficial effects

[0013] The integrated ball screw servo motor provided by the utility model has the advantages that: the structure integrates the fixed installation of the screw rod and the motor rotor, improves the coaxiality of the motor rotor and the screw rod, gets rid of the various influences caused by eccentricity caused by the use of couplings and screw rods for connection and installation, greatly improves the concentricity and operating stability of the screw rod and the motor, and fixes the screw rod by a hollow shaft and a locking nut, so that the screw rod can be quickly replaced, which is convenient for disassembly and replacement of the screw rod, increases efficiency and saves space for fixing the screw rod structure, eliminates the previous complicated fixing method, improves the simplification of the structure, reduces the processing technology and assembly time, and an adjusting nut is arranged in the rear end cover, and the internal space gap can be reduced by adjusting the nut to prevent the rotor from moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model.

[0017] In the figure: 1. ball screw shaft; 2. ball nut; 3. oil seal; 4. housing; 5. bearing; 6. stator core; 7. rotor core; 8. rear end cover; 9. adjusting nut; 10. encoder; 11. magnet; 12. locking nut; 13. hollow shaft; 14. encoder rear cover. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] 4. Please refer to Figure 1 The utility model provides an embodiment: an integrated ball screw servo motor, including 1, a ball screw shaft 2, a ball nut 3, an oil seal 4, a housing 5, a bearing 6, a stator core 7, a rotor core 8, a rear cover 9, an adjusting nut 10, an encoder 11, a magnet 12, a locking nut 13, a hollow shaft 14, and an encoder rear cover, wherein the stator core 6 is fixedly arranged inside the housing 4, and the hollow shaft 13 is fixedly installed in the rotor core 7 and sleeved in the stator core 6, 1, the ball screw shaft is sleeved in the hollow shaft 13, and the rear end of the hollow shaft 13 has 12, a locking nut fixing 1, and locking the ball screw shaft, 1 3. Bearings 5 ​​are fixedly installed on the front and rear sides of the hollow shaft respectively. 8. The rear end cover is fixedly installed on the rear side of the outer shell 4. An adjusting nut is arranged in the rear end cover 8. The magnet is installed at the tail end of the ball screw shaft 11 and is sleeved in the encoder 10 and the encoder rear cover 14. The other side of the rear end cover 8 is fixedly connected with the encoder 10. At the same time, the other side of the rear end cover 8 is fixedly connected with the encoder rear cover 14, and the encoder 10 is located in the internal space formed by the encoder rear cover 14 and the rear end cover 8. 2. Ball nuts are matched and connected on the ball screw shaft 1. 3. Oil seals are arranged and installed on the front side of the outer shell 4.

[0021] Working principle: When in use, first when there is no control voltage, there is only a pulsating magnetic field generated by the excitation winding in the stator core 7, and the rotor core 8 is stationary; when there is a control voltage, a rotating magnetic field is generated in the stator core 7, and the rotor core 8 rotates along the direction of the rotating magnetic field, and the ball screw shaft 1 is rotated by the rotation of the rotor core 8. The ball nut 2 converts the rotational motion into a linear motion along the axis of the ball screw shaft 1 in a spiral transmission manner; the ball screw shaft 1 and the ball nut 2 are used to cooperate with the spiral transmission, the oil seal 3 is used to seal the connection between the ball screw shaft 1 and the housing 4, the adjusting nut 9 is used to adjust the internal clearance of the motor, the hollow shaft 13 is used to install the ball screw shaft 1, and the locking nut 12 is used to fix the ball screw shaft 1.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An integrated ball screw servo motor comprises a ball screw shaft (1), a ball nut (2), an oil seal (3), a housing (4), a bearing (5), a stator core (6), a rotor core (7), a rear end cover (8), an adjusting nut (9), an encoder (10), a magnet (11), a locking nut (12), a hollow shaft (13), and an encoder rear cover (14). The stator core (6) is fixedly arranged inside the housing (4), and the hollow shaft (13) is fixedly installed in the rotor core (7) and sleeved on the stator core (6). The ball screw shaft (1) is sleeved in the hollow shaft (13), and a locking nut (12) is provided at the rear end of the hollow shaft (13) to fix and lock the ball screw shaft (1).

2. The integrated ball screw servo motor according to claim 1, characterized in that: The hollow shaft (13) is fixedly mounted with bearings (5) on both the front and rear sides, respectively. The rear end cover (8) is fixedly mounted on the rear side of the housing (4), and an adjusting nut (9) is arranged inside the rear end cover (8).

3. The integrated ball screw servo motor according to claim 2, characterized in that: The magnet (11) is installed at the rear end of the ball screw shaft (1) and is sleeved in the encoder (10) and the encoder rear cover (14).

4. The integrated ball screw servo motor according to claim 3, characterized in that: An encoder (10) is fixedly connected to the other side of the rear end cover (8), and an encoder rear cover (14) is fixedly connected to the other side of the rear end cover (8), and the encoder (10) is located in an internal space formed by the encoder rear cover (14) and the rear end cover (8).

5. The integrated ball screw servo motor according to claim 4, characterized in that: The ball screw shaft (1) is cooperatively connected with a ball nut (2), and an oil seal (3) is arranged and installed on the front side of a housing (4).

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