Direct Drive System

Abstract

The present invention provides a direct drive system and belongs to the technical field of motors. [Solution] The direct drive system includes a plurality of bases connected together and at least one slide base spaced apart from the bases, wherein a guide rail and a stator assembly are provided on the bases, and a movable assembly is fixed to the slide base opposite the stator assembly, and the movable assembly and the stator assembly interact to drive the slide base to slide along the guide rail, and at least a portion of the orthogonal projection of the guide rail on the bases along the sliding direction of the slide base is located outside the base.

Description

[Technical field]

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

[0002] In conventional direct drive systems, defects such as low straightness and complex assembly positioning are easily generated during assembly, which not only reduces manufacturing efficiency but also leads to uneven force conditions when the direct drive system is in operation, which affects the performance of the direct drive system, and makes it difficult to maintain the direct drive system after assembly.

[0003] 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 of the motor is limited, resulting in low flexibility and versatility in use. Therefore, in order to make the length of the direct drive system adjustable and to facilitate assembly and maintenance, it is known to design the direct drive system modularly and directly join each module to be used as a single system. However, the current modular design of the direct drive system still has a problem that when each module is joined, the joining of individual parts between the modules is likely to be incomplete, and especially when the guide rails cannot be in complete contact with each other, this causes deterioration of the operating performance of the system.

[0004] 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]

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a direct drive system that solves at least one of the technical problems existing in the prior art. [Means for solving the problem]

[0006] The present invention provides a direct drive system, the direct drive system including: a base; and at least one slide base spaced apart from the base; The base is provided with a guide rail and a stator assembly; the slide base is fixed to the base by the guide rail, and a mover assembly is fixed to the slide base, the mover assembly being provided opposite to the stator assembly, and the slide base is driven to slide on the guide rail by interaction between the mover assembly and the stator assembly; At least a portion of the guide rail is projected onto the base in the sliding direction of the slide base and is positioned outside the base.

[0007] Preferably, the base includes a bottom plate, and the guide rail includes an attachment portion provided on an inner surface of the bottom plate, and a joint portion extending from the attachment portion to the outside of the bottom plate along the sliding direction of the slide base.

[0008] Preferably, the direct drive system includes a plurality of the slide bases, and the plurality of slide bases are attached to the guide rails by the joint portions so as to be slidable thereon.

[0009] Preferably, the base further includes a top plate facing the bottom plate at a distance therefrom, and the stator assembly includes a first magnetic body provided on a side of the top plate adjacent to the bottom plate, and a plurality of coils fixed to the first magnetic body and spaced apart from each other, The movable member assembly includes a second magnetic body provided on the side of the slide base facing the top plate, and a plurality of magnetic steel pieces fixed to the second magnetic body and spaced apart, the magnetic steel pieces being spaced apart opposite the coil.

[0010] Preferably, the first magnetic conductive body includes a magnetic conductive substrate and a plurality of teeth provided on the magnetic conductive substrate, and the coil is fitted onto the teeth.

[0011] Preferably, at least one slidable slider is provided on a side of the slide base facing the bottom plate, and the slide base slides on the guide rail by means of the slider.

[0012] Preferably, the sliders are provided symmetrically on both opposing sides of the guide rail along the moving direction of the slide base.

[0013] 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 of the slide base; 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.

[0014] Preferably, the number of the first position feedback members is plural, and the plural first position feedback members are arranged at equal intervals on the side plate.

[0015] Preferably, the first position feedback member is a readhead and the second position feedback member is a grid scale. Effect of the Invention

[0016] The present invention ensures that at least a portion of the orthogonal projection of the guide rail on the base along the sliding direction of the slide base is located outside the base, thereby ensuring that the guide rail structure is the first to come into contact when joining modules together, thereby ensuring smooth sliding of the direct drive system and reducing the difficulty of assembling and maintaining the system. [Brief description of the drawings]

[0017] [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 an embodiment of the present invention from another angle. [Diagram 3] FIG. 1 is a cross-sectional view of a direct drive system according to an embodiment of the present invention. [Figure 4] FIG. 2 is a structural schematic diagram of a stator module according to an embodiment of the present invention; [Diagram 5] FIG. 2 is a structural schematic diagram of a stator assembly according to an embodiment of the present invention; [Figure 6] FIG. 2 is a structural schematic diagram of a mover module according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 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.

[0019] 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.

[0020] As shown in Figures 1 to 6, the present invention provides a direct drive system 100 including a base 110 and at least one slide base 120 spaced apart from the base, wherein the base 110 is provided with a guide rail 130 and a stator assembly 140, and the slide base 120 is fixed with a mover assembly 150 opposed to the stator assembly 140, and the mover assembly 150 and the stator assembly 140 interact with each other to drive the slide base 120 to slide on the guide rail 130, and at least a portion of the orthogonal projection of the guide rail 130 on the base 110 along the sliding direction of the slide base 120 is located outside the base 110.

[0021] In this embodiment, the base and the guide rail and stator assembly provided thereon correspond to a stator module, and the slide base and the mover assembly correspond to a mover module, and the length of the direct drive system can be adjusted by joining a plurality of stator modules. In addition, the orthogonal projection of the guide rail on the base along the sliding direction of the slide base is at least partially located outside the base, so that when the mover and the stator module are joined, the first thing to come into contact is the guide rail, ensuring smooth connection of the guide rail, and avoiding the situation where the gap between the other parts is slightly larger and the guide rail does not come into complete contact and the other parts come into contact first.

[0022] The stator assembly of this embodiment includes various shapes such as a straight line, a circular arc, and a sector shape, and together they form one stator system, and are not particularly limited.

[0023] Furthermore, it should be noted that each stator module can be provided with one mover module, and it goes without saying that one stator module may have a set of two, three or more mover modules.

[0024] 1 to 4, the base 110 includes a bottom plate 111, and the guide rail 130 includes an attachment portion 131 provided on the inner surface of the bottom plate 111, and a joint portion 132 extending from the attachment portion 131 to the outside of the bottom plate 111 along the sliding direction of the slide base 120. That is, the joint portion protrudes a certain dimension from the base to ensure that the first contact between the modules becomes the guide rail structure.

[0025] In some preferred embodiments, the direct drive system may include a plurality of slide bases, which are slidably attached to the guide rails by joints, i.e., each module is joined by a joint, and the slide base slides on the guide rails of each joined stator module by each joint, and slides relative to each base.

[0026] 1 to 6, the base 110 further includes a top plate 112 disposed opposite the bottom plate 111 at a distance, and the stator assembly 140 includes a first magnetic conductive body 141 disposed on a side of the top plate 112 close to the bottom plate 111, and a plurality of coils 142 fixed to the first magnetic conductive body 141 and disposed at intervals. The mover assembly 150 includes a second magnetic conductive body 151 disposed on a side of the slide base 120 facing the top plate 112, and a plurality of magnetic steel pieces 152 fixed to the second magnetic conductive body 151 and disposed at intervals, and the magnetic steel pieces 152 are disposed opposite the coils 142.

[0027] 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 guide rail.

[0028] In some preferred embodiments, as shown in FIG. 5, the first magnetic conductive body 141 includes a magnetic conductive substrate 141a and a plurality of teeth 141b provided on the magnetic conductive substrate 141a, and the coil 142 is fitted around the teeth 141b.

[0029] It should be noted that the magnetic steel of this embodiment can first be attached to the second magnetic conductive body, and then the entire assembly can be attached to the slide base.

[0030] In another preferred embodiment, as shown in Figures 1 to 4 and 6, at least one slidable slider 121 is provided on the side of the slide base 120 facing the bottom plate 111, and the slide base 120 slides on the guide rail 130 by the slider 121.

[0031] In this embodiment, the structure and number of sliders are not specifically limited, and can be specifically provided based on the structure of the guide rail. For example, when slide parts are provided on both sides of the guide rail, two or four sliders can be symmetrically provided below the slide base, and the sliders can slide on the slide parts. At this time, the sliders are symmetrically provided on both opposing sides of the guide rail along the moving direction of the slide base, so as to make the movement of the slide base more stable.

[0032] Furthermore, as shown in Figures 1 to 4, the base 110 further includes a side plate 113 connected between the top plate 112 and the bottom plate 111, 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.

[0033] In some preferred embodiments, as shown in FIGS. 1 to 4, the number of first position feedback members 160 is plural, and the multiple first position feedback members 160 are disposed on the side plate 113 at equal intervals.

[0034] 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.

[0035] 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.

[0036] 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 the position information of the mover module to an external drive control system, thereby achieving the drive control of the mover assembly.

[0037] 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.

[0038] Specifically, as shown in Figures 1 to 4 and 6, the slide base 120 includes a first plate 122 arranged opposite and spaced from the top plate 112, a second magnetic conductive body 151 and a plurality of magnetic steel pieces 152 are arranged on the side of the first plate 122 facing the top plate 112, a slider 121 is arranged on the side of the first plate 122 facing the bottom plate 111, and a second position feedback member 170 is arranged on the side of the first plate 122 facing the side plate 113.

[0039] Furthermore, still referring to Figures 1 to 4 and 6, the slide base 120 further includes an extension plate 123 extending upward from the first plate 122 to above the top plate 112, and a second plate 124 connected to the extension plate 123 and arranged opposite the first plate 122; i.e., the second plate 124 is arranged above the top plate 112, and drives the slide base to slide relative to the base when the stator assembly and the movable assembly generate relative thrust.

[0040] The present invention provides a direct drive system, which has the following beneficial effects compared with the prior art: the guide rail is provided such that at least a part of the orthogonal projection of the slide base on the base along the sliding direction is located outside the base, thereby ensuring that the guide rail structure is the first to come into contact when the mover module and the stator module are joined together, thereby ensuring the smooth sliding of the direct drive system and reducing the difficulty of assembling and maintaining the system.

[0041] 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 at least one slide base provided at a distance from the base, The base is provided with a guide rail and a stator assembly; the slide base is fixed to the base by the guide rail, and a mover assembly is fixed to the slide base so as to face the stator assembly, and the mover assembly and the stator assembly interact with each other to drive the slide base to slide on the guide rail; At least a part of the guide rail is projected on the base in the sliding direction of the slide base so as to be located outside the base, The base includes a bottom plate, a top plate facing the bottom plate at a distance, and a side plate connected between the top plate and the bottom plate, The slide base includes a first plate body provided opposite the top plate with a gap therebetween, an extension plate extending upward from the first plate body to above the top plate, and a second plate body connected to the extension plate and provided opposite the first plate body, the second plate body being provided above the top plate, The guide rail includes an attachment portion provided on an inner surface of the bottom plate and a joint portion extending from the attachment portion to an outside of the bottom plate along a sliding direction of the slide base, and the guide rail is provided immediately below the top plate, The direct drive system includes a plurality of the slide bases, the plurality of slide bases being slidably attached to the guide rail by the joint portion, and the slide bases being located directly above the guide rail.

2. The stator assembly includes a first magnetic body provided on a side of the top plate adjacent to the bottom plate, and a plurality of coils fixed to the first magnetic body and spaced apart from each other; 2. The direct drive system according to claim 1, wherein the mover assembly includes a second magnetic conductive body provided on a side of the first plate facing the top plate, and a plurality of magnetic steel pieces fixed to the second magnetic conductive body and spaced apart, the magnetic steel pieces being spaced apart from each other and facing the coil.

3. 3. The direct drive system according to claim 2, wherein the first magnetic conductive body includes a magnetic conductive substrate and a plurality of teeth provided on the magnetic conductive substrate, and the coil is fitted onto the teeth.

4. 3. The direct drive system according to claim 2, wherein at least one slidable slider is provided on a side of the slide base facing the bottom plate, and the slide base slides on the guide rail by means of the slider.

5. 5. The direct drive system according to claim 4, wherein the sliders are provided symmetrically on both opposing sides of the guide rail along the moving direction of the slide base.

6. At least one first position feedback member is provided on the side plate along a sliding direction of the slide base, 6. The direct drive system according to claim 2, wherein a second position feedback member is provided on a side of the first plate facing the side plate, the second position feedback member being opposed to and spaced apart from the at least one first position feedback member.

7. 7. The direct drive system according to claim 6, wherein the number of the first position feedback members is plural, and the first position feedback members are arranged at equal intervals on the side plate.

8. 7. The direct drive system of claim 6, wherein said first position feedback member is a read head and said second position feedback member is a grid scale.

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