Large-inertia servo motor special for machine tool

Abstract

The utility model relates to the field of motors, and discloses a large-inertia servo motor special for a machine tool, which comprises a shell, a rotor shaft, a connecting plate, a plurality of inertia discs and a plurality of mounting structures, the rotor shaft is rotationally mounted in the shell; the connecting plate is fixed on the rotor shaft; the inertia discs are sequentially arranged and movably installed in the shell, the adjacent inertia discs are detachably connected, and the inertia disc close to the connecting plate is detachably connected with the connecting plate. The mounting structures are in one-to-one correspondence with the inertia discs, each mounting structure comprises an annular plate, a connecting rod and a moving frame, the annular plates are slidably mounted in the shell in the axial direction of the rotor shaft, the inertia discs are rotatably mounted on the inner rings of the annular plates, the moving frames are mounted on the outer side of the shell, and the connecting rods are fixed between the annular plates and the moving frames; the shell is provided with a channel for the connecting plate to move. According to the utility model, the inertia of the motor can be changed without opening the motor shell to replace the inertia disc, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a large-inertia servo motor dedicated to machine tools. Background Art

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect speed change device. With the development of industrial automation, industrial equipment has higher and higher requirements for servo motors. Depending on the type of load, different equipment has different requirements for the inertia of the servo motor. For example, a large machine tool with a large load requires a servo motor with a large inertia.

[0003] Patent application number 201520789569.0 discloses a servo motor with an inertia disk, including a housing and a stator and rotor arranged in the housing. The front and rear ends of the housing are respectively provided with a front end cover and a rear end cover. An inertia disk is connected to the rotor, and the inertia disk is located between the stator and the rear end cover. The stator is filled with potting glue to become a potted stator. A wire fixing body formed by potting glue protrudes from the rear end surface of the potted stator. The wires led out from the stator pass through the wire fixing body and then lead out of the housing. The wire fixing body is located between the housing and the inertia disk.

[0004] The above patent increases the inertia of the motor by providing an inertia disk. However, if a larger inertia is required, the motor cover must be opened to install the larger inertia disk, which is inconvenient. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a large-inertia servo motor dedicated to machine tools, which solves the problem pointed out in the background technology that if a larger inertia is required, the motor cover must be opened to assemble a larger inertia disk, resulting in inconvenience in operation.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A large-inertia servo motor dedicated to machine tools, the servo motor comprising:

[0008] case;

[0009] a rotor shaft, the rotor shaft being rotatably mounted within the housing;

[0010] A connecting plate fixed to the rotor shaft;

[0011] a plurality of inertia discs, the inertia discs being arranged in sequence and movably mounted in the housing, the adjacent inertia discs being detachably connected to each other, and the inertia discs close to the connecting plate being detachably connected to the connecting plate; and

[0012] A number of mounting structures, the mounting structures corresponding to the inertia discs one by one. The mounting structure includes an annular plate, a connecting rod and a moving frame. The annular plate is slidably mounted along the axial direction of the rotor shaft in the housing. The inertia disc is rotatably mounted on the inner ring of the annular plate. The moving frame is mounted on the outside of the housing. The connecting rod is fixed between the annular plate and the moving frame. A channel for the connecting plate to move is provided on the housing.

[0013] Furthermore, docking rods are fixed on one side of both the connecting plate and the inertia disc. A docking hole is provided on the side of the inertia disc close to the connecting plate.

[0014] The docking rod of the connecting plate can be inserted into the docking hole of the nearest inertia disc, and the docking rod of the inertia disc can be inserted into the docking hole of the adjacent inertia disc.

[0015] Furthermore, the end of the docking rod is set to a hemispherical structure, and the open end of the docking hole is set to a flared shape.

[0016] Furthermore, a number of docking holes are provided on the inertia disc. The number of docking holes is distributed in a circumferential array structure, and the open ends between adjacent docking holes are seamlessly connected.

[0017] Furthermore, a locking part is fixed on the moving frame. A locking bolt is threadedly connected to the locking part. The screw end of the locking bolt can be abutted against the housing.

[0018] Furthermore, an installation cavity is provided in the housing. The inertia disc, the connecting plate and the annular plate are all installed in the installation cavity.

[0019] Furthermore, a bearing is installed between the annular plate and the inertia disc.

[0020] Furthermore, an avoidance through hole for the rotor shaft to pass through is provided in the middle of the inertia disc. The aperture of the avoidance through hole is larger than the diameter of the rotor shaft.

[0021] Advantages of the present utility model:

[0022] By adopting the technical solution of the present application, when it is necessary to increase the inertia of the servo motor, technicians can directly drive the corresponding inertia disc to be connected to the connecting plate or the adjacent inertia disc by moving the mounting structure, so as to increase the inertia of the servo motor. It is possible to change the inertia of the motor without opening the motor housing to replace the inertia disc, and the operation is convenient. Description of the drawings

[0023] Figure 1 It is a schematic structural diagram of a high-inertia servo motor dedicated for machine tools in an embodiment of the present application;

[0024] Figure 2It is a cross-sectional view of a large-inertia servo motor dedicated to a machine tool in an embodiment of the present application;

[0025] Figure 3 It is a schematic structural diagram of an installation structure and an inertia disk in an embodiment of the present application;

[0026] Among them, 100 is a housing; 110 is an installation cavity; 120 is a channel; 200 is a rotor shaft; 300 is a connecting plate; 400 is an inertia disk; 410 is an avoidance through hole; 420 is a docking rod; 430 is a docking hole; 500 is an installation structure; 510 is an annular plate; 520 is a connecting rod; 530 is a moving frame; 531 is a locking part; 532 is a locking bolt; 540 is a bearing. Specific Embodiments

[0027] The following specific embodiments are used to illustrate the implementation manners of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the diagrams provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation to the present invention. In order to better illustrate the embodiments of the present invention, some components in the diagrams will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the diagrams may be omitted.

[0028] In the diagrams of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the diagrams, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the diagrams are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] As Figures 1 - 3 shown, an embodiment of the present application provides a large-inertia servo motor dedicated to a machine tool. The servo motor includes a housing 100, a rotor shaft 200, a connecting plate 300, a plurality of inertia disks 400, and a plurality of installation structures 500. In addition, the servo motor also has a rotor, a stator, and other electronic control components inside, and these structures are not involved in improvements in this embodiment and will not be elaborated.

[0030] Inside the housing 100, there is an installation cavity 110, which is used to install part of the structure of the inertia disk 400, the connecting plate 300, and the installation structure 500. By providing a separate installation cavity 110 inside the housing 100, the above-mentioned structures are separated from the structures such as the rotor and stator of the servo motor, which can prevent the structures such as the inertia disk 400 from contaminating the rotor and stator of the servo motor.

[0031] The connecting plate 300 is set as a circular structure. The connecting plate 300 is fixed on the rotor shaft 200, and the connecting plate 300 can be used as the basic structure for connecting the inertia disk 400.

[0032] All the inertia disks 400 are arranged in sequence along the axial direction of the rotor shaft 200 and are movably installed inside the housing 100. A relief through hole 410 for the rotor shaft 200 to pass through is provided in the middle of the inertia disk 400. The aperture of the relief through hole 410 is larger than the diameter of the rotor shaft 200, so that the inertia disk 400 does not directly contact the rotor shaft 200. The specific number of the inertia disks 400 is not limited. In this embodiment, three are provided. The adjacent inertia disks 400 are detachably connected, and the inertia disk 400 close to the connecting plate 300 is detachably connected to the connecting plate 300. When it is necessary to increase the inertia of the motor, first connect an inertia disk 400 close to the connecting plate 300 to the connecting plate 300, and then, according to the load requirements of the equipment, connect the subsequent inertia disks 400 to the adjacent inertia disks 400, so that these inertia disks 400 can be installed on the rotor shaft 200 through the connecting plate 300, thereby increasing the inertia of the motor, and the inertia disks 400 can be increased or decreased according to specific requirements.

[0033] The installation structure 500 corresponds to the inertia disk 400 one by one, and the installation structure 500 is used to install the corresponding inertia disk 400. Specifically, the installation structure 500 includes an annular plate 510, a connecting rod 520, and a moving frame 530. Among them, the annular plate 510 is slidably installed inside the housing 100 along the axial direction of the rotor shaft 200, and the inertia disk 400 is rotatably installed on the inner ring of the annular plate 510. Specifically, a bearing 540 is installed between the annular plate 510 and the inertia disk 400. The outer ring of the bearing 540 is fixed to the annular plate 510, and the inner ring of the bearing 540 is fixed to the inertia disk 400. The moving frame 530 is set as a square structure adapted to the outer wall of the housing 100, and the moving frame 530 is installed outside the housing 100. The connecting rod 520 is fixed between the annular plate 510 and the moving frame 530, and the connecting rod 520 can fix the annular plate 510 and the moving frame 530 together. The annular plate 510 and the connecting plate 300 can move along the axial direction of the rotor shaft 200 following the annular plate 510. A channel 120 for the connecting plate 300 to move is provided on the housing 100, and this channel 120 communicates the installation cavity 110 with the outside.

[0034] By adopting the above technical solution, when it is necessary to increase the inertia of the servo motor, technicians can directly drive the corresponding inertia disk 400 to connect to the connecting plate 300 or the adjacent inertia disk 400 by moving the mounting structure 500, thereby increasing the inertia of the servo motor, which is convenient to operate.

[0035] In this embodiment, a docking rod 420 is fixed to one side of both the connecting plate 300 and the inertia disc 400. A docking hole 430 is provided on the side of the inertia disc 400 facing away from the docking rod 420. When connecting the inertia disc 400 and the connecting plate 300, the docking rod 420 of the connecting plate 300 can be inserted into the docking hole 430 of the inertia disc 400 to achieve the connection between the inertia discs 400 and the connecting plate 300. When connecting adjacent inertia discs 400, the docking rod 420 of one inertia disc 400 can be inserted into the docking hole 430 of the other inertia disc 400 to achieve the connection between the adjacent inertia discs 400.

[0036] In the present embodiment, the end of the docking rod 420 is set to a hemispherical structure, and the open end of the docking hole 430 is set to a trumpet shape. By being arranged like this, the docking rod 420 can better enter the docking hole 430, making the docking process smoother.

[0037] In this embodiment, the inertia disk 400 is provided with a plurality of docking holes 430 arranged in a circular array, with the open ends of adjacent docking holes 430 seamlessly connected. This arrangement allows the docking rod 420 to be smoothly inserted into one of the docking holes 430 regardless of its position on the connecting plate 300, facilitating a smoother docking process. Furthermore, two docking rods 420 can be provided, symmetrically arranged.

[0038] In this embodiment, a locking portion 531 is fixed to the movable frame 530, and a locking bolt 532 is threadedly connected to the locking portion 531. The screw end of the locking bolt 532 can be tightly pressed against the housing 100. The provision of the locking bolt 532 can secure the movable frame 530 to the housing 100, thereby fixing the axial position of the inertia disc 400 with respect to the rotor shaft 200, thereby preventing the inertia disc 400 from separating from the connecting plate 300 or adjacent inertia discs 400 from each other during rotation of the rotor shaft 200.

[0039] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural portions not described in detail in the present invention are well known.

Claims

1. A large inertia servo motor dedicated to a machine tool, characterized in that, The servo motor includes: A housing (100); A rotor shaft (200), which is rotatably installed in the housing (100); A connecting plate (300), which is fixed on the rotor shaft (200); A plurality of inertia disks (400), which are arranged in sequence and movably installed in the housing (100), the adjacent inertia disks (400) are detachably connected, and the inertia disk (400) close to the connecting plate (300) is detachably connected to the connecting plate (300); and A plurality of mounting structures (500), which correspond to the inertia disks (400) one by one. The mounting structure (500) includes an annular plate (510), a connecting rod (520) and a moving frame (530). The annular plate (510) is slidably installed in the housing (100) along the axial direction of the rotor shaft (200), the inertia disk (400) is rotatably installed on the inner ring of the annular plate (510), the moving frame (530) is installed outside the housing (100), the connecting rod (520) is fixed between the annular plate (510) and the moving frame (530), and a channel (120) for the connecting plate (300) to move is provided on the housing (100).

2. The servo motor according to claim 1, wherein One side of the connecting plate (300) and the inertia disk (400) are both fixed with docking rods (420), and a docking hole (430) is provided on the side of the inertia disk (400) close to the connecting plate (300); The docking rod (420) of the connecting plate (300) can be inserted into the docking hole (430) of the nearest inertia disk (400), and the docking rod (420) of the inertia disk (400) can be inserted into the docking hole (430) of the adjacent inertia disk (400).

3. The servo motor according to claim 2, wherein, The end of the docking rod (420) is set as a hemispherical structure, and the open end of the docking hole (430) is set as a flared shape.

4. The servo motor according to claim 3, wherein, A plurality of docking holes (430) are formed on the inertia disk (400), and the plurality of docking holes (430) are distributed in a circumferential array structure, and the open ends between the adjacent docking holes (430) are seamlessly connected.

5. The servo motor according to claim 1, characterized in that, A locking part (531) is fixed on the moving frame (530), a locking bolt (532) is threadedly connected to the locking part (531), and the screw end of the locking bolt (532) can be abutted against the housing (100).

6. The servo motor according to claim 1, characterized in that, An installation cavity (110) is provided in the housing (100), and the inertia disk (400), the connecting plate (300) and the annular plate (510) are all installed in the installation cavity (110).

7. The servo motor according to claim 1, characterized in that, A bearing (540) is installed between the annular plate (510) and the inertia disk (400).

8. The servo motor according to claim 1, wherein A relief through hole (410) for the rotor shaft (200) to pass through is provided in the middle of the inertia disk (400), and the diameter of the relief through hole (410) is larger than the diameter of the rotor shaft (200).

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