Low-speed fluctuation linear motor special for interpolation

Abstract

The utility model relates to the technical field of linear motors, in particular to a special low-speed fluctuation linear motor for interpolation, which comprises a stator and a mover positioned in the stator, and is characterized in that the mover comprises a sliding sleeve, a coil is sleeved on the outer surface of the sliding sleeve, two sides of the sliding sleeve are fixedly connected with limiting rings, and the limiting rings are fixedly connected with the stator and the mover. And positioning seats are fixedly connected to one sides of the two limiting rings, and a connecting plate is fixedly connected between the two positioning seats. The device has the advantages that the sliding sleeve is arranged, and the coil is fixed on the surface of the sliding sleeve, so that when the coil is electrified to move, force directly acts on the sliding sleeve, and then the limiting rings on the two sides are driven to synchronously move, so that the two limiting rings on the two sides respectively provide pushing force and pulling force for the connecting plate, and the two limiting rings on the two sides do work at the same time; therefore, deformation of the connecting portion of the limiting ring and the connecting plate is reduced, the firmness of the structure is further enhanced, the heat dissipation fins are slidably connected into the heat dissipation grooves, and the heat dissipation efficiency of the coil can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motors, and particularly relates to a linear motor with low speed fluctuation for interpolation. Background Art

[0002] Interpolation is the process by which a machine tool numerical control system determines the tool motion trajectory according to a certain method. It can also be said that, given some data on a curve, the method of calculating the intermediate points between known points according to a certain algorithm is also called "densification of data points"; the numerical control device densifies the space between the starting point and the ending point of the curve described by the input part program according to the information of the part program, so as to form the required contour trajectory, and this "densification of data points" function is called "interpolation".

[0003] In interpolation, a linear motor is required. Interpolation requires high precision, high speed, and good control performance for the linear motor. Therefore, a linear motor with low speed fluctuation is needed. In a coreless linear motor, there is no attractive force or cogging effect between the coil unit and the magnetic track. Therefore, it can provide power without fluctuation, high precision, and constant linear force. Thus, the coreless linear motor can be widely used in interpolation.

[0004] A super-high acceleration carbon fiber coreless linear motor disclosed in Chinese Patent CN220510958U has an extremely high thrust density. The motor mover has a carbon fiber reinforcement plate, and its strength and rigidity are particularly good. The motor of the utility model has air cooling holes on the yoke, and by connecting an air pipe, the temperature rise can be efficiently reduced. Moreover, the motor has an intermediate yoke plate that divides the magnetic field into upper and lower parts, greatly improving the utilization rate of the coil. However, while solving problems, the super-high acceleration carbon fiber coreless linear motor has the following defects:

[0005] The left carbon fiber ring and the right carbon fiber ring are arranged on both sides of the coil. Therefore, when the mover moves towards one side with a large gravitational acceleration, for example, when moving to the left, the coil pushes the left carbon fiber ring to move. The main stressed structure is the left carbon fiber ring. The left carbon fiber ring needs to pull the right carbon fiber ring to move through the carbon fiber plate on one side. Therefore, the connection part between the left carbon fiber ring and the carbon fiber plate is stressed greatly and is thus prone to deformation. Although the coil, the left carbon fiber ring, the carbon fiber plate, and the right carbon fiber ring are encapsulated together with epoxy resin, the epoxy resin is brittle and has low impact strength. Therefore, in the case of a large gravitational acceleration, if the epoxy resin is used as the main force transmission, cracks are likely to occur and then gradually break, resulting in insufficient structural firmness. Summary of the Utility Model

[0006] The purpose of the utility model is to solve at least one of the technical defects described in the background art.

[0007] To this end, an object of the present utility model is to provide a linear motor with low speed fluctuation dedicated for interpolation, aiming to solve the problems in the prior art that in the case of a large gravitational acceleration, the connection part between the carbon fiber and the carbon fiber plate of the ultra-high acceleration carbon fiber coreless linear motor is prone to deformation, and it will cause the epoxy resin to crack easily and gradually break, resulting in insufficient structural firmness.

[0008] In order to achieve the above object, an embodiment of one aspect of the present utility model provides a linear motor with low speed fluctuation dedicated for interpolation, including a stator and a mover located inside the stator. The mover includes a sliding sleeve, a coil is sleeved on the outer surface of the sliding sleeve, limiting rings are fixedly connected to both sides of the sliding sleeve, a positioning seat is fixedly connected to one side of each of the two limiting rings, a connecting plate is fixedly connected between the two positioning seats, the stator includes a lower yoke plate, support plates are fixedly installed on the tops of both sides of the lower yoke plate, an upper yoke plate is fixedly installed on the tops of the two support plates, magnets are fixedly connected to the top of the lower yoke plate and the bottom of the upper yoke plate, and a middle yoke plate is fixedly installed in the middle of the two support plates.

[0009] Preferably, from any of the above solutions, the sliding sleeve is sleeved on the outer surface of the middle yoke plate, a heat dissipation pipe is arranged inside the middle yoke plate, a hole groove corresponding to the heat dissipation pipe is opened on the side surface of the support plate, a heat dissipation groove is opened on the outer surface of the middle yoke plate, heat dissipation fins are fixedly connected to the inner wall of the sliding sleeve, and the heat dissipation fins are slidably connected inside the heat dissipation groove.

[0010] Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

[0011] 1. By providing a sliding sleeve and fixing the coil on the surface of the sliding sleeve, when the coil is energized and moves, the force directly acts on the sliding sleeve, and then drives the limiting rings on both sides to move synchronously. Thus, the two limiting rings on both sides respectively provide a thrust and a pull force to the connecting plate, and the two limiting rings on both sides do work simultaneously, thereby reducing the deformation generated at the connection part between the limiting ring and the connecting plate, and further strengthening the structural firmness.

[0012] 2. By providing a heat dissipation groove on the surface of the middle yoke plate and fixedly connecting heat dissipation fins to the inner wall of the sliding sleeve, and making the heat dissipation fins slidably connected inside the heat dissipation groove, the contact area between the sliding sleeve and the middle yoke plate is increased, so that the heat transfer between the sliding sleeve and the middle yoke plate is improved. Since a heat dissipation pipe is arranged inside the middle yoke plate, the heat dissipation efficiency of the coil can be accelerated.

[0013] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0015] Figure 1 is a schematic structural diagram of the present utility model.

[0016] Figure 2 is an exploded schematic structural diagram of the present utility model.

[0017] Figure 3 is a schematic structural diagram of the yoke plate in the present utility model.

[0018] Figure 4 is a sectional schematic structural diagram of the yoke plate in the present utility model.

[0019] Figure 5 is a schematic structural diagram of the sliding sleeve of the present utility model.

[0020] Wherein: 1, stator, 11, lower yoke plate, 12, support plate, 13, upper yoke plate, 14, magnet, 15, middle yoke plate, 16, rear support plate, 2, mover, 21, sliding sleeve, 22, coil, 23, limit ring, 24, positioning seat, 25, connecting plate, 26, heat dissipation fin, 3, heat dissipation pipe, 31, hole groove, 32, heat dissipation groove. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0022] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and the like 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] The present utility model provides a linear motor with low speed fluctuation for interpolation.

[0024] Embodiment 1:

[0025] As Figures 1-5As shown in the figure, it includes a stator 1 and a rotor 2 located inside the stator 1. The rotor 2 includes a sliding sleeve 21. A coil 22 is sleeved on the outer surface of the sliding sleeve 21. Limiting rings 23 are fixedly connected to both sides of the sliding sleeve 21. The coil 22 is sleeved on the surface of the sliding sleeve 21. After the coil 22 is energized to generate magnetic force, it moves, and the thrust directly drives the sliding sleeve 21 to move. The limiting rings 23 play an auxiliary role to avoid the problem that the coil 22 slips off under the condition of a large gravitational acceleration. A positioning seat 24 is fixedly connected to one side of the two limiting rings 23, and a connecting plate 25 is fixedly connected between the two positioning seats 24.

[0026] The stator 1 includes a lower yoke plate 11. Support plates 12 are fixedly installed at the tops of both sides of the lower yoke plate 11. An upper yoke plate 13 is fixedly installed at the tops of the two support plates 12. Through holes for inserting bolts are provided on both the lower yoke plate 11 and the upper yoke plate 13. Threaded holes are provided at the tops and bottoms of the support plates 12. The lower yoke plate 11, the support plates 12 and the upper yoke plate 13 are fixed together by bolts. Magnets 14 are fixedly connected to the tops of the lower yoke plate 11 and the bottoms of the upper yoke plate 13. A middle yoke plate 15 is fixedly installed in the middle of the two support plates 12. Through holes for inserting bolts are provided on the sides of the support plates 12. Threaded holes are provided on the sides of the middle yoke plate 15, so that the middle yoke plate 15 and the support plates 12 are fixed together by bolts. A rear support plate 16 is fixedly installed at the rear between the lower yoke plate 11 and the upper yoke plate 13. Threaded holes are provided at the tops and bottoms of the rear support plate 16. Through holes are provided at the positions corresponding to the threaded holes on the lower yoke plate 11, the upper yoke plate 13 and the rear support plate 16. The rear support plate 16 is fixed to the lower yoke plate 11 and the upper yoke plate 13 by bolts. The sliding sleeve 21 is sleeved on the outer surface of the middle yoke plate 15. A heat dissipation pipe 3 is arranged inside the middle yoke plate 15. A hole groove 31 corresponding to the heat dissipation pipe 3 is provided on the side of the support plate 12. A pipe can be used to penetrate the hole groove 31 and be connected to the heat dissipation pipe 3 to fill cold air into the middle yoke plate 15, so as to dissipate heat from the coil 22 on the surface of the sliding sleeve 21 and ensure the long-term stable operation of the linear motor.

[0027] Embodiment 2:

[0028] As Figures 3-5 shown, on the basis of Embodiment 1, heat dissipation grooves 32 are provided on the outer surface of the middle yoke plate 15. Heat dissipation fins 26 are fixedly connected to the inner wall of the sliding sleeve 21. The heat dissipation fins 26 are slidably connected inside the heat dissipation grooves 32. During the movement of the rotor 2, the heat generated by the coil 22 is transferred to the surface of the heat dissipation fins 26 through the sliding sleeve 21. The heat dissipation fins 26 slide in the heat dissipation grooves 32, so as to accelerate the heat transfer between the coil 22 and the middle yoke plate 15 by increasing the contact area, thereby accelerating the heat dissipation efficiency of the coil 22.

[0029] The working principle of the present utility model is as follows: After being powered on, the coil 22 generates magnetic force, thereby generating a moving force between the magnets 14 on the lower yoke plate 11 and the upper yoke plate 13, causing the mover 32 to move. The movement of the mover 32 is due to the force exerted by the coil 22 on the sliding sleeve 21, and the sliding sleeve 21 drives the limiting rings 23 on both sides to move. Therefore, one of the limiting rings 23 provides a pulling force to the connecting plate 25 through the positioning seat 24, and the other limiting ring 23 provides a pushing force to the connecting plate 25 through the positioning seat 24. Thus, the two limiting rings 23 on both sides apply forces simultaneously, and in the case of a relatively large gravitational acceleration, the deformation generated at the connecting part of the limiting ring 23 and the connecting plate 25 can be reduced, thereby further strengthening the structural firmness.

[0030] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A low-speed fluctuation linear motor dedicated to interpolation, comprising a stator (1) and a mover (2) located inside the stator (1), characterized in that: The mover (2) comprises a sleeve (21), the outer surface of the sleeve (21) is sleeved with a coil (22), both sides of the sleeve (21) are fixedly connected to limit rings (23), one side of the two limit rings (23) is fixedly connected to a positioning seat (24), and a connecting plate (25) is fixedly connected between the two positioning seats (24).

2. The low-speed fluctuation linear motor dedicated to interpolation according to claim 1, characterized in that: The stator (1) comprises a lower yoke plate (11), support plates (12) are fixedly mounted on the tops of both sides of the lower yoke plate (11), upper yoke plates (13) are fixedly mounted on the tops of the two support plates (12), magnets (14) are fixedly connected to the top of the lower yoke plate (11) and the bottom of the upper yoke plate (13), and a middle yoke plate (15) is fixedly mounted in the middle of the two support plates (12).

3. The low-speed fluctuation linear motor dedicated to interpolation according to claim 2, characterized in that: A rear support plate (16) is fixedly installed on the rear side between the lower yoke plate (11) and the upper yoke plate (13).

4. The low-speed fluctuation linear motor dedicated to interpolation according to claim 2, characterized in that: The sliding sleeve (21) is sleeved on the outer surface of the middle yoke plate (15), and a heat dissipation pipe (3) is arranged inside the middle yoke plate (15).

5. The low-speed fluctuation linear motor dedicated to interpolation according to claim 4, characterized in that: The side surface of the support plate (12) is provided with a hole groove (31) corresponding to the heat dissipation pipe (3).

6. The low-speed fluctuation linear motor dedicated to interpolation according to claim 5, characterized in that: The outer surface of the middle yoke plate (15) is provided with a heat dissipation groove (32), the inner wall of the sliding sleeve (21) is fixedly connected with a heat dissipation fin (26), and the heat dissipation fin (26) is slidably connected inside the heat dissipation groove (32).

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