Linear motor

Abstract

The utility model discloses a linear motor, which comprises a rotor and a stator parallel to the rotor, the rotor comprises a base, a plurality of iron cores and coils, the iron cores are sequentially arranged and fixed on the base, the coils are wound on the iron cores, one of the base and the iron cores is provided with a fixing groove, and the fixing groove is arranged in the fixing groove. And the other one is provided with a fixing block fixedly connected with the fixing groove. The utility model has the advantage of solving the problem of low installation precision of the current spliced rotor iron core. The iron core is fixed on the base, and the base is used for positioning the iron core, so that the mounting precision of the rotor can be improved, and the base and the iron core can be freely matched according to design requirements. And the iron core and the base are fixedly connected through the fixing groove and the fixing block, no complex tool is needed in the assembling process, the assembling process is simple, and batch production can be achieved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a linear motor. Background Art

[0002] Linear motors are used to directly generate linear motion without the inertia and backlash of intermediate transmission links. This allows for extremely fast response, high-speed starts and stops, and precise position control. In automated production lines, linear motors enable high-speed, high-precision material transport and positioning, improving production efficiency and product quality.

[0003] A linear motor consists of a mover and a stator. The mover includes a core. However, current mover cores are all monolithic. If the mover length or stack height needs to be changed later, the entire core must be replaced. Consequently, there are patents, such as Chinese Patent Publication No. CN212305101U, entitled "Linear Motor," which employs a spliced-type mover design. Adjacent movers are connected by bonding or by means of ribs and grooves. This mounting structure makes it easy for the movers to lose their reference position, resulting in low installation precision for the core, which affects the performance of the entire linear motor. Utility Model Content

[0004] The purpose of the utility model is to provide a linear motor, which can effectively solve the problem of low installation precision of the existing spliced mover core.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A linear motor includes a mover and a stator arranged parallel to the mover. The mover includes a base, a plurality of iron cores arranged in sequence and fixed on the base, and coils wound on the iron cores. One of the base and the iron core is provided with a fixing groove, and the other is provided with a fixing block fixedly connected to the fixing groove.

[0007] In the above linear motor, a protruding blocking portion is provided on the inner side wall of the fixing slot, and the blocking portion blocks the fixing block from being separated from the fixing slot along the direction of the line connecting the mover and the stator.

[0008] In the above linear motor, the cross section of the fixing slot is dovetail-shaped or largely semicircular.

[0009] In the above linear motor, the iron core includes a tooth portion, a first yoke portion and a second yoke portion respectively provided at opposite ends of the tooth portion, and the first yoke portion is fixedly connected to the base.

[0010] In the above linear motor, the cross section of the iron core is in an I-shape, the second yokes of adjacent iron cores are arranged at intervals, and the first yokes of adjacent iron cores are arranged closely.

[0011] In the above linear motor, sealing blocks are respectively provided at both ends of the base along the arrangement direction of the iron cores.

[0012] In the above linear motor, the end surface of the sealing block away from the base is flush with the end surface of the coil away from the base.

[0013] In the above linear motor, a fixing groove is provided on the base, and a fixing block is provided on the sealing block.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] By arranging the iron cores fixed on the base in sequence on the base, the problem of low installation accuracy of the current spliced mover iron core is solved. Fixing the iron core on the base and using the base to position the iron core can improve the installation accuracy of the mover, and the iron core and the base are connected and fixed by fixing grooves and fixing blocks. When the length of the mover needs to be changed, it can be achieved by replacing bases of different lengths and then installing the appropriate number of iron cores. When the stacking height of the mover needs to be changed, it can be achieved by replacing iron cores of different heights. The original easy-to-replace feature of the spliced mover can still be retained, and the parameters of the mover can be adjusted more conveniently according to user needs. In addition, the iron core and the base are fixedly connected by fixing grooves and fixing blocks, and there is no need to use complex tools during assembly. The assembly process is simple, which is conducive to mass production.

[0016] Furthermore, a protruding blocking portion is provided on the inner side wall of the fixing slot, and the blocking portion blocks the fixing block from leaving the fixing slot along the connecting line between the mover and the stator. The blocking portion prevents the core from moving toward the stator, which is conducive to maintaining the distance between the core and the stator.

[0017] Furthermore, the cross section of the fixing groove is dovetail-shaped or semicircular-shaped. These two shapes of fixing grooves are easy to process and have good positioning effects, which can not only keep the relative position of the core and the base fixed but also prevent the core from separating from the base toward the stator.

[0018] Furthermore, the iron core includes a tooth portion, a first yoke portion and a second yoke portion provided at opposite ends of the tooth portion, wherein the first yoke portion is fixedly connected to the base. The second yoke portion can guide the magnetic flux concentration, thereby increasing the magnetic force of the electromagnet. The second yoke portion also provides a larger heat dissipation area for the iron core to dissipate heat generated by the coil during operation.

[0019] Furthermore, the cores have an I-shaped cross-section, with the second yokes of adjacent cores spaced apart and the first yokes of adjacent cores positioned closely together. This allows for a more uniform magnetic field generated by a single core when fitted with coils, along the core arrangement direction. The close proximity of the first yokes facilitates more precise positioning of the cores within a row, while the spacing of the second yokes creates airflow channels, effectively dissipating heat from the coils.

[0020] Furthermore, along the arrangement direction of the iron cores, sealing blocks are provided at both ends of the base, which guide the magnetic field generated by the coils at both ends to the working area so that the magnetic field can also function and improve the utilization rate of the magnetic field.

[0021] Furthermore, the end surface of the sealing block away from the base is flush with the end surface of the coil away from the base, so that the sealing block covers the entire coil. If the sealing block is too short to cover the coil, it will not be able to fully guide the magnetic field generated by the coil, while if the sealing block is too long, it will cause waste.

[0022] Furthermore, a fixing groove is formed on the base, and a fixing block is provided on the sealing block. The thickness of the sealing block is smaller than the thickness of the iron core. The fixing block provided at the end of the sealing block does not affect the strength of the sealing block, thereby ensuring the firmness of the connection between the sealing block and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a linear motor of the present utility model;

[0024] Figure 2 This is an exploded diagram of a mover in a linear motor of the present utility model;

[0025] Figure 3 This is a three-dimensional diagram of the iron core in a linear motor of the present utility model.

[0026] The accompanying drawings are:

[0027] The mover 100 , the base 110 , the iron core 120 , the teeth 121 , the upper yoke 122 , the lower yoke 123 , the coil 130 , the fixing slot 140 , the blocking portion 141 , the fixing block 150 , the sealing block 160 , and the stator 200 . DETAILED DESCRIPTION

[0028] A linear motor includes a mover 100 and a stator 200 arranged parallel to the mover 100. The mover 100 includes a base 110, a plurality of iron cores 120 arranged in sequence and fixed on the base 110, and a coil 130 wound around the iron cores 120. One of the base 110 and the iron core 120 is provided with a fixing groove 140, and the other is provided with a fixing block 150 fixedly connected to the fixing groove 140.

[0029] By sequentially arranging the iron cores 120 fixed to the base 110 on the base 110, the problem of low installation accuracy of the iron cores 120 of the current spliced mover 100 is solved. By fixing the iron cores 120 to the base 110 and using the base 110 to position the iron cores 120, the installation accuracy of the mover 100 can be improved. The iron cores 120 and the base 110 are connected and fixed by fixing grooves 140 and fixing blocks 150. When the length of the mover 100 needs to be changed, the bases 110 of different lengths can be replaced and then the appropriate number of iron cores 120 can be installed. When the stacking height of the mover 100 needs to be changed, the iron cores 120 of different heights can be replaced. The original easy-to-replace feature of the spliced mover 100 can still be retained, and the parameters of the mover 100 can be adjusted more conveniently according to user needs. In addition, the iron cores 120 and the base 110 are fixedly connected by fixing grooves 140 and fixing blocks 150, and no complicated tools are required during assembly. The assembly process is simple, which is conducive to mass production.

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] See Figures 1 to 3 This is an embodiment of a linear motor according to the present invention. The linear motor includes a stator 200 and a mover 100. The stator 200 is provided with a plurality of permanent magnets. The mover 100 is capable of linear motion along the centerline axis of the stator 200. The mover 100 includes a base 110, a plurality of iron cores 120 arranged in sequence and fixed to the base 110, and a coil 130 wound around the iron cores 120. The iron cores 120 are arranged in a line and fixed along the length of the base 110. A fixing slot 140 is provided on one of the base 110 and the iron core 120, and a fixing block 150 fixedly connected to the fixing slot 140 is provided on the other. This embodiment is described by taking the example of the iron core 120 having the fixing slot 140 and the base 110 having the fixing block 150 provided.

[0035] The fixing slot 140 extends through the core 120 along the width of the base 110 and opens toward the base 110. The fixing block 150 is also disposed along the width of the base 110, and the length of the fixing block 150 is equal to the width of the base 110. In this embodiment, the width of the core 120 is equal to the width of the base 110, making full use of the width of the base 110 to arrange a larger core 120, thereby producing a better magnetic conductivity. The cores 120 are each individually fixedly connected to the base 110 via the fixing slot 140 and the fixing block 150. Therefore, the base 110 can be used to position the cores 120, avoiding the problem of spliced cores 120 being positioned based on the previous core 120, resulting in a large positional deviation between the last core 120 and the first core 120. In this embodiment, each core 120 is kept at an equal distance from the stator 200, ensuring sufficient stability during operation of the mover 100.

[0036] Furthermore, to prevent the core 120 from detaching from the base 110 along the line connecting the mover 100 and the stator 200, a protruding blocking portion 141 is provided on the inner sidewall of the fixing slot 140 to block the fixing block 150. With the blocking portion 141 in place, the fixing block 150 cannot be inserted into the fixing slot 140 along the height of the base 110. Instead, the fixing block 150 is inserted into the fixing slot 140 along the width of the base 110. Specifically, the cross-section of the fixing slot 140 can be configured in a dovetail or semicircular shape to achieve the aforementioned effect, with the cross-section of the fixing slot 140 being consistent with the shape of the fixing slot 140.

[0037] Based on the above embodiment, the iron core 120 includes a tooth portion 121, a first yoke portion 122 and a second yoke portion 123 located at opposite ends of the tooth portion 121, the first yoke portion 122 is fixedly connected to the base 110, the coil 130 is wound on the tooth portion 121, and the second yoke portion 123 faces the stator 200. By setting the second yoke portion 123, the magnetic flux can be guided to concentrate and the magnetic force of the electromagnet can be increased. The second yoke portion 123 also enables the iron core 120 to have a larger heat dissipation area to discharge the heat generated when the coil 130 is working.

[0038] Furthermore, the cross-section of the core 120 is I-shaped, meaning the teeth 121 are connected between the middle of the first yoke 122 and the middle of the second yoke 123. This ensures that the magnetic field generated by the coil 130 wound around the teeth 121, and the magnetic field on both sides of the teeth 121, can be properly guided into the working area by the second yoke 123. The first yokes 122 of adjacent cores 120 are tightly attached, which facilitates the positioning of the cores 120 and ensures the utilization of the space on the base 110. The second yokes 123 of adjacent cores 120 are spaced apart, leaving gaps between the second yokes 123 to form heat dissipation channels, effectively dissipating the heat generated by the coils 130.

[0039] In the basic field of the above embodiment, along the arrangement direction of the iron core 120, a sealing block 160 is provided at both ends of the base 110. The sealing block 160 guides the magnetic field generated by the coils 130 on the iron cores 120 at both ends to the working area, thereby improving the utilization rate of the magnetic field generated by the coils 130 at both ends.

[0040] Furthermore, the end face of the sealing block 160 away from the base 110 is flush with the end face of the coil 130 away from the base 110, ensuring maximum utilization of the sealing block 160. If the length of the sealing block 160 is too short, it cannot guide all the magnetic fields generated by the side of the coil 130 to the working area. If the length of the sealing block 160 is too long, the portion of the sealing block 160 that extends beyond the coil 130 will not be effective, resulting in wasted length. In order to better position the sealing block 160, the sealing block 160 is closely attached to the first yoke 122 of the adjacent iron core 120. The sealing block 160 and the base 110 are also fixedly connected using a fixing block 150 and a fixing groove 140. However, since the thickness of the sealing block 160 is not too large, the fixing block 150 is provided on the sealing block 160 and the fixing groove 140 is provided on the base 110. This will not damage the strength of the sealing block 160.

[0041] When installing the mover 100 of the above structure, a machine can be used to first wind the coil 130 on the iron core 120, and then the iron core 120 can be inserted into the base 110 to form the mover 100. When the length of the mover 100 needs to be changed, the iron core 120 can be removed and then installed on the base 110 of the appropriate length. When the stacking height of the mover 100 needs to be changed, the iron core 120 of different heights can be replaced without replacing the base 110. Therefore, the base 110 and the iron core 120 can be freely matched according to design requirements to adapt to more usage scenarios. In addition, since each iron core 120 is fixed to the base 110 and each iron core 120 is positioned using the base 110, the position accuracy of the iron core 120 on the entire mover 100 will be higher than that of the traditional spliced mover 100, so that the performance of the entire mover 100 can be improved.

[0042] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A linear motor comprising a mover and a stator arranged parallel to the mover, characterized in that: The mover includes a base, a plurality of iron cores arranged in sequence and fixed on the base, and coils wound on the iron cores. One of the base and the iron cores is provided with a fixing groove, and the other is provided with a fixing block fixedly connected to the fixing groove.

2. A linear motor according to claim 1, characterized in that: A protruding blocking portion is provided on the inner side wall of the fixing groove, and the blocking portion blocks the fixing block from being separated from the fixing groove along the connecting direction of the mover and the stator.

3. A linear motor according to claim 2, characterized in that: The cross section of the fixing groove is dovetail-shaped or semicircular.

4. A linear motor according to claim 1, characterized in that: The iron core includes a tooth portion, a first yoke portion and a second yoke portion respectively provided at opposite ends of the tooth portion, and the first yoke portion is fixedly connected to the base.

5. A linear motor according to claim 4, characterized in that: The cross section of the iron core is in an I-shape, the second yokes of adjacent iron cores are arranged at intervals, and the first yokes of adjacent iron cores are arranged closely.

6. A linear motor according to claim 1, characterized in that: Along the arrangement direction of the iron cores, sealing blocks are respectively provided at both ends of the base.

7. A linear motor according to claim 6, characterized in that: An end surface of the sealing block away from the base is flush with an end surface of the coil away from the base.

8. A linear motor according to claim 6, characterized in that: A fixing groove is provided on the base, and a fixing block is provided on the sealing block.

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