Direct Drive System

Abstract

The present invention provides a direct drive system and belongs to the technical field of drive systems. [Solution] The direct drive system of the present invention includes a base and a slide base arranged at a distance from the base, a stator assembly is arranged on the base, and a mover assembly is arranged on the slide base, the mover assembly includes a first magnetic conductive body and a plurality of magnetic steel pieces arranged on the first magnetic conductive body, the stator assembly includes at least one set of second magnetic conductive bodies and a plurality of sets of windings arranged at a distance from the second magnetic conductive bodies, the windings are arranged opposite the magnetic steel, and the magnetic field generated by the at least one set of windings covers at least one piece of magnetic steel, thereby generating an electromagnetic thrust together with the magnetic steel, driving the slide base to move along the sliding direction.

Description

[Technical field]

[0001] The present invention relates to the technical field of drive systems, in particular direct drive systems. [Background technology]

[0002] A motor of a direct drive system generally includes a stator assembly and a mover assembly that interact with each other, among which the stator assembly includes an iron core and a coil attached to the iron core. In the prior art, the coils are arranged in close proximity to each other, which increases the amount of coils and iron cores used, resulting in high material costs. In turn, the large coil usage will further increase heat generation and energy consumption, thereby reducing the operating efficiency of the direct drive system.

[0003] Therefore, there is a need to provide a new direct drive system to solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a direct drive system that solves one of the technical problems existing in the prior art. [Means for solving the problem]

[0005] The present invention provides a direct drive system, the direct drive system including: a base; and a slide base spaced apart from the base, the base being provided with a stator assembly; and the slide base being provided with a mover assembly; The mover assembly includes a first magnetic conductive body and a plurality of magnetic steel pieces provided in the first magnetic conductive body, The stator assembly includes at least one set of second magnetic bodies and multiple sets of windings spaced apart from the second magnetic bodies, the windings being arranged opposite the magnetic steel, and the magnetic field generated by at least one set of the windings covers at least one of the magnetic steels, thereby generating an electromagnetic thrust together with the magnetic steel, driving the slide base to move along the sliding direction.

[0006] Preferably, the length of the gap between two adjacent sets of windings is smaller than the overall length of the plurality of magnetic steel pieces.

[0007] Preferably, the stator assembly includes a set of second magnetic conductive bodies, and the second magnetic conductive bodies are provided continuously along the sliding direction.

[0008] Preferably, the stator assembly includes a plurality of sets of second conductive bodies, the plurality of sets of second conductive bodies being spaced apart along the sliding direction, and the second conductive bodies being arranged in one-to-one correspondence with the windings.

[0009] Preferably, at least one of both ends of each set of second magnetic conductive bodies along the length direction is provided with an auxiliary tooth.

[0010] Preferably, the second magnetic conductive body includes a magnetic conductive substrate and a plurality of teeth provided on the magnetic conductive substrate, Each set of the windings includes a plurality of coils, which are fitted around the teeth.

[0011] Preferably, the base includes a top plate, and the second magnetic body and the plurality of windings are provided in order on an inner surface of the top plate. The first magnetic conductive body and the plurality of magnetic steel pieces are provided in order on the side of the slide base facing the top plate.

[0012] Preferably, the base further includes a bottom plate spaced apart from the top plate, and a guide rail is provided on an inner surface of the bottom plate. At least one slidable slider is provided on the side of the slide base facing the bottom plate, and the slide base moves on the guide rail by means of the slider.

[0013] Preferably, an orthogonal projection of the guide rail on the base along the sliding direction is located outside the base.

[0014] Preferably, the base further includes a side plate connected between the top plate and the bottom plate, and the side plate is provided with at least one first position feedback member along the sliding direction; A second position feedback member is provided on the side of the slide base facing the side plate, and the second position feedback member is provided facing the at least one first position feedback member with a gap therebetween. Effect of the Invention

[0015] In the present invention, multiple sets of windings are arranged at intervals, and current is applied to the coils in each set of windings in cooperation to drive the mover assembly with magnetic steel to operate, thereby effectively reducing the number of coils used and reducing material costs, and further reducing the amount of heat generated and energy consumption, thereby improving the operating efficiency of the direct drive system. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a structural schematic diagram of a direct drive system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of a direct drive system according to another embodiment of the present invention. [Diagram 3] FIG. 4 is a cross-sectional view of a direct drive system according to another embodiment of the present invention. [Figure 4] FIG. 4 is a structural schematic diagram of a mover unit according to another embodiment of the present invention. [Diagram 5] FIG. 4 is a structural schematic diagram of a stator unit according to another embodiment of the present invention; [Figure 6] FIG. 4 is a structural schematic diagram of a stator assembly according to another embodiment of the present invention. [Figure 7] FIG. 4 is a structural schematic diagram of a stator unit according to another embodiment of the present invention; [Figure 8] FIG. 4 is a structural schematic diagram of a stator assembly according to another embodiment of the present invention. [Figure 9] FIG. 4 is a structural schematic diagram of a stator unit according to another embodiment of the present invention; [Figure 10] FIG. 4 is a structural schematic diagram of a stator assembly according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings and specific embodiments, in order for those skilled in the art to better understand the technical solution of the present invention.

[0018] In some descriptions of the present invention, unless otherwise expressly stated and limited, the terms "attached," "connected," "coupled," "fixed," and similar terms are not limited to physical or mechanical connection, but may include electrical connection, and may be a communication or interaction between two elements, whether directly or indirectly connected through an intermediate medium. And the orientations or positional relationships indicated by the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like are orientations or positional relationships shown based on the drawings, and are used to indicate relative positional relationships, and after the absolute positions of the objects described are changed, the relative positional relationships may change correspondingly.

[0019] As shown in Figures 1 to 10, the present invention provides a direct drive system 100 including a base 110 and a slide base 120 spaced apart from the base 110, a mover assembly 130 is provided on the slide base 120, and a stator assembly 140 is provided on the base 110, the mover assembly 130 includes a first magnetic conductive body 131 and a plurality of magnetic steel pieces 132 provided on the first magnetic conductive body 131, the stator assembly 140 includes at least one set of second magnetic conductive bodies 141 and a plurality of sets of windings 142 provided on the second magnetic conductive body 141 at intervals, the windings 142 are provided opposite the magnetic steel pieces 132, and the magnetic field generated by the at least one set of windings 142 covers at least one magnetic steel piece 132, thereby generating an electromagnetic thrust together with the magnetic steel pieces 132, thereby driving the slide base 120 to move along the sliding direction.

[0020] In this embodiment, the windings in the stator assembly are provided in multiple sets and are arranged at intervals. Therefore, by energizing the coils in each set of windings in cooperation, the number of coils used can be effectively reduced, material costs can be reduced, and the amount of heat generated can be reduced, energy consumption can be reduced, and the operating efficiency of the direct drive system can be improved.

[0021] The working principle of the direct drive system of this embodiment is as follows: when an appropriate current is applied to the winding in the stator assembly, the winding generates a traveling wave magnetic field, and the magnetic steel in the mover assembly induces a magnetic field, which generates an air gap magnetic field between the magnetic steel and the winding, and then a thrust force is generated to drive the mover assembly with the magnetic steel and the slide base to move along the slide direction.

[0022] As can be understood, in order to induce a magnetic field in the magnetic steel in the mover assembly, an air gap magnetic field is generated between the magnetic steel and the windings, and the length of the gap between each set of windings along the sliding direction of the slide base should be smaller than the length of the first magnetic conductive body or the total length of the multiple magnetic steels in the mover assembly, i.e., the length of the first magnetic conductive body and the magnetic steel needs to be sufficiently long, thereby ensuring that the windings and magnetic steel generate an air gap magnetic field at any time, so that the mover assembly is driven by different windings to operate when it passes through different windings.

[0023] In some preferred embodiments, as shown in Figures 5 to 8, the stator assembly 140 includes a plurality of sets of second magnetic conductive bodies 141, which are spaced apart along the sliding direction, and the second magnetic conductive bodies 141 are arranged in one-to-one correspondence with the windings 142, i.e., each set of windings is arranged on the second magnetic conductive bodies spaced apart from each other.

[0024] In this embodiment, the second magnetic conductive bodies are provided at intervals in synchronization with the multiple sets of windings, thereby making it possible to further reduce the amount of magnetic conductive bodies used and reduce material costs.

[0025] 7 and 8, in a further preferred embodiment, auxiliary teeth 141c are provided on at least one of both ends along the length direction of the second magnetic conductive body 141 of each set. That is, auxiliary teeth are provided on either one or both ends of the magnetic conductive substrate of the second magnetic conductive body of each set.

[0026] In a further preferred embodiment, as shown in Figs. 7 and 8, each set of second magnetic conductive bodies 141 is provided with auxiliary teeth 141c at both ends along the length direction.

[0027] In this embodiment, by providing auxiliary teeth at the end of the second magnetic conductive body, the effect of reducing thrust ripple can be achieved.

[0028] In another preferred embodiment, as shown in Figures 9 and 10, the stator assembly 140 includes a set of second magnetic bodies 141, which are arranged continuously along the sliding direction, and multiple sets of windings 142 are arranged at intervals on the second magnetic bodies 141.

[0029] In this embodiment, the second conductive bodies are continuously arranged and the windings are spaced apart from the second conductive bodies, which further reduces thrust ripple compared to the embodiment in which the second conductive bodies and the windings are synchronously arranged at intervals.

[0030] Furthermore, as shown in Figures 5 to 10, the second magnetic conductive body 141 includes a magnetic conductive substrate 141a and a plurality of teeth 141b provided on the magnetic conductive substrate 141a, and each set of windings 142 includes a plurality of coils, and each coil is fitted around each tooth 141b.

[0031] It should be understood that the coil is further connected to an external power source and controlled to energize the coil by an external drive control system connected to the coil, and when current is passed through the coil, the coil generates a traveling wave magnetic field, the magnetic steel induces a magnetic field, an air gap magnetic field is generated between the magnetic steel and the coil, and thrust is generated between the magnetic steel and the coil to drive the slide base to move along the sliding direction.

[0032] 1 to 4, the base 110 includes a top plate 111, and the second magnetic conductive body 141 and the multiple sets of windings 142 are sequentially provided on the inner surface of the top plate 111, i.e., the second magnetic conductive body is provided on the inner surface of the top plate along the sliding direction, and the multiple sets of windings are provided on the second magnetic conductive body along the sliding direction. The first magnetic conductive body 131 and the multiple magnetic steel pieces 132 are sequentially provided on the side of the slide base 120 facing the top plate 111, i.e., the first magnetic conductive body is provided on the slide base along the sliding direction, and the multiple magnetic steel pieces are provided on the first magnetic conductive body along the sliding direction, and the multiple magnetic steel pieces are distributed at intervals and provided opposite the multiple sets of windings.

[0033] In a further preferred embodiment, the plurality of windings are provided at equal intervals on the second magnetic conductive body, and the plurality of magnetic steel pieces are provided at equal intervals on the first magnetic conductive body.

[0034] In addition, the magnetic steel of this embodiment can be first attached to the first magnetic conductive body, and then the whole can be attached to the slide base.

[0035] Furthermore, as shown in Figures 1 to 4, the base 110 further includes a bottom plate 112 spaced apart from the top plate 111, and a guide rail 150 is provided on the inner surface of the bottom plate 112 along the sliding direction, and at least one slidable slider 121 is provided on the side of the slide base 120 facing the bottom plate 112, and the slide base 120 moves on the guide rail 150 by the slider 121.

[0036] In addition, in this embodiment, the structure and number of the sliders are not specifically limited, and can be specifically set based on the structure of the guide rail. For example, when slide portions are provided on both sides of the guide rail, two or four sliders are symmetrically provided below the slide base, and the sliders are slid onto the slide portions.

[0037] In addition, since the length of the conventional direct drive system is fixed, it is necessary to select a direct drive system with a length suitable for different applications, and the length is limited, resulting in low flexibility and versatility in use. Therefore, it is possible to adjust the length of the direct drive system according to actual needs, that is, the stator unit can be designed as a module and multiple stator units can be joined together.

[0038] As a further preferred embodiment, as shown in FIGS. 1 and 4, the orthogonal projection of the guide rail 150 on the base 110 along the sliding direction is located outside the base 110, so that when the base is joined to a structure such as a stator assembly, the first thing to come into contact is the guide rail, ensuring smooth connection of the guide rail and avoiding a situation in which the intervals of other parts become slightly larger and the guide rail does not come into complete contact with other parts first, thereby reducing the difficulty of assembling and maintaining the system.

[0039] Furthermore, as shown in Figures 1 to 4, the base 110 further includes a side plate 113 connected between the top plate 111 and the bottom plate 112, and at least one first position feedback member 160 is provided on the side plate 113 along the sliding direction of the slide base 120, and a second position feedback member 170 is provided on the side of the slide base 120 facing the side plate 113, and the second position feedback member 170 is provided opposite the at least one first position feedback member 160 at a distance.

[0040] In a further preferred embodiment, the side plate is provided with a plurality of mounting grooves spaced apart from one another, and the first position feedback member is provided in a corresponding mounting groove.

[0041] In a further preferred embodiment, the first position feedback member can use a grid scale and the second position feedback member can use a grid scale readhead.

[0042] The second position feedback member in this embodiment moves in synchronization with the slide base. When the slide base passes the first position feedback member, the first position feedback member senses position information at the second position feedback member, and transmits position information of the mover assembly and the slide base to an external drive control system, thereby achieving drive control of the mover assembly.

[0043] In this embodiment, the specific structure of the slide base is not particularly limited, and it may be formed by combining a plurality of sub-structures, or may be an integral structure.

[0044] Specifically, as shown in Figures 1 to 4, the slide base 120 includes a first plate 122 arranged opposite and spaced from the top plate 111, a first magnetic conductive body 131 and a plurality of magnetic steel pieces 132 are arranged on the side of the first plate 122 facing the top plate 111, a slider 121 is arranged on the side of the first plate 122 facing the bottom plate 112, and a second position feedback member 170 is arranged on the side of the first plate 122 facing the side plate 113.

[0045] Furthermore, still referring to Figures 1 to 4, the slide base 120 includes an extension plate 123 extending upward from the first plate 122 to above the top plate 111, and a second plate 124 connected to the extension plate 123 and arranged opposite the first plate 122; that is, the second plate 124 is arranged above the top plate 111 and drives the slide base to slide relative to the base when the stator assembly and the movable assembly generate relative thrust.

[0046] In this embodiment, the base and the stator assembly and guide rail provided thereon form a stator unit, and the slide base and the mover assembly provided thereon form a mover unit, and the stator assembly and the mover assembly interact with each other to drive the slide base to move along the guide rail.

[0047] The stator assembly of this embodiment may have various shapes such as a straight line, a circular arc, or a sector shape, and is not particularly limited.

[0048] It should be noted that each stator assembly may be provided with one mover assembly, and naturally, one stator assembly may have a set of two, three or more mover assemblies.

[0049] The present invention provides a direct drive system, which has the following advantageous effects compared to the prior art: A plurality of sets of windings and a second conductive body are provided at intervals, and each set of windings is energized in cooperation to drive a mover assembly with magnetic steel to move, thereby reducing the amount of coils and other components used in the stator assembly and reducing costs; and the coils are provided at intervals, which reduces the amount of heat generated, further reducing energy consumption, and improving the operating efficiency of the direct drive system.

[0050] It is understood that the above embodiments are merely exemplary embodiments used to explain the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and these modifications and improvements are also considered to be within the protection scope of the present invention.

Claims

1. 1. A direct drive system comprising: The present invention includes a base and a slide base spaced apart from the base, the base being provided with a stator assembly, and the slide base being provided with a mover assembly, The mover assembly includes a first magnetic conductive body and a plurality of magnetic steel pieces provided in the first magnetic conductive body, The stator assembly includes at least one set of second magnetic conductive bodies and a plurality of sets of windings spaced apart from the second magnetic conductive bodies, the windings being arranged to face the magnetic steel, and a magnetic field generated by at least one set of the windings covers at least one of the magnetic steel pieces, thereby generating an electromagnetic thrust together with the magnetic steel pieces to drive the slide base to move along the slide direction; The base includes a top plate, and the second magnetic body and the plurality of windings are provided in sequence on an inner surface of the top plate; The base further includes a bottom plate spaced apart from the top plate, and a guide rail is provided on an inner surface of the bottom plate. At least one slidable slider is provided on a side of the slide base facing the bottom plate, and the slide base moves on the guide rail by the slider; the slide base includes a first plate body provided opposite the top plate with a gap therebetween, the first magnetic conductive body and the plurality of magnetic steel pieces are provided in order on a side of the first plate body facing the top plate, and the slider is provided on a side of the first plate body facing the bottom plate, The slide base further includes an extension plate extending upward from the first plate to above the top plate, and a second plate connected to the extension plate and disposed opposite the first plate, the second plate being disposed above the top plate, characterized in that

2. 2. The direct drive system according to claim 1, wherein a length of an interval between two adjacent sets of said windings is smaller than a total length of said plurality of magnetic steel pieces.

3. 2. The direct drive system according to claim 1, wherein the stator assembly includes a set of second magnetic bodies, the second magnetic bodies being arranged continuously along the sliding direction.

4. 2. The direct drive system according to claim 1, wherein the stator assembly includes a plurality of sets of second magnetic conductive bodies, the plurality of sets of second magnetic conductive bodies being spaced apart along the sliding direction, and the second magnetic conductive bodies being provided in one-to-one correspondence with the windings.

5. 5. The direct drive system according to claim 4, wherein at least one of both ends of each of the second magnetic conductive bodies in the longitudinal direction is provided with an auxiliary tooth.

6. the second magnetic conductive body includes a magnetic conductive substrate and a plurality of teeth provided on the magnetic conductive substrate; 5. The direct drive system according to claim 3, wherein each set of the windings includes a plurality of coils, the coils being fitted around the teeth.

7. 2. The direct drive system according to claim 1, wherein an orthogonal projection of the guide rail on the base along the sliding direction is located outside the base.

8. The base further includes a side plate connected between the top plate and the bottom plate, and the side plate is provided with at least one first position feedback member along the sliding direction; 8. The direct drive system according to claim 7, wherein a second position feedback member is provided on a side of the slide base facing the side plate, the second position feedback member being opposed to and spaced apart from the at least one first position feedback member.

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