Direct Drive Transmission System

Abstract

The present invention provides a direct drive transmission system. [Solution] The transmission system includes a movable unit and a stator unit that drives the movement of the movable unit, the stator unit including a stator assembly, two first end covers, and two first guide rails, the movable unit including a movable assembly, two second end covers, and two second guide rails, the two second end covers face the two first end covers with a gap between them, the two second guide rails abut against the two first guide rails to form a sliding connection, the spacing surface between the first and second end covers is a planar structure in orthogonal projection, the transmission system includes a stopper structure, one end of the stopper structure adjacent to the second end cover is located between the two second end covers, and the stator assembly drives the movable assembly to move the second guide rails on the first guide rails, thereby contacting the second end cover with a side wall of the stopper structure to implement positional regulation.

Description

[Technical field]

[0001] The present invention relates to the field of transmission systems, and more particularly to direct drive transmission systems. [Background technology]

[0002] 2. Description of the Related Art With the development of direct drive transmission system technology, direct drive transmission systems have been widely applied in various direct drive motors.

[0003] The direct drive transmission system of the prior art is composed of multiple stators and multiple movable elements, and the stators drive the movement of the movable elements to achieve the effect of direct drive. In the prior art direct drive transmission system, the left and right stroke limits of the direct drive motor are generally achieved by making the base end cover contact with the stopper structure on the slide base end cover to realize hard position regulation.

[0004] However, in some compact motor structures in the prior art, the base end cover and the sliding base end cover are offset from each other in a zigzag pattern, which not only makes the sliding base end cover and the base end cover relatively complicated, but also reduces the contact area for position control in order to make the structure compact, which may result in low reliability.

[0005] Therefore, there is a need to provide a new direct drive transmission system to solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is to provide a direct drive transmission system that is easy to assemble, has a large position control area, and is highly reliable. [Means for solving the problem]

[0007] In order to solve the above technical problems, the present invention provides a direct drive transmission system, the direct drive transmission system including: a mover unit; and a stator unit for driving the movement of the mover unit; the stator unit includes a stator assembly, two first end covers fixed to opposing circumferential sides of the stator assembly, and two first guide rails fixed to a side of the stator assembly adjacent to the movable unit and extending along a moving direction of the movable unit, the two first guide rails being parallel to each other and spaced apart from each other; the movable unit includes a movable assembly, two second end covers fixed to both opposing peripheral sides of the movable assembly, and two second guide rails fixed to a side of the movable assembly adjacent to the stator unit and extending along a moving direction of the movable unit, the two second guide rails being parallel to each other and spaced apart, the two second end covers being directly opposite the two first end covers and spaced apart from each other, the two second guide rails abutting against the two first guide rails, respectively, to form a sliding connection, and a space between the first end cover and the second end cover has a planar structure in an orthogonal projection, The direct drive transmission system further includes a stopper structure fixed to a side of the stator assembly adjacent to the movable assembly, one end of the stopper structure adjacent to the second end cover is located between the two second end covers, and the stator assembly drives the movable assembly to move the second guide rail on the first guide rail, thereby bringing the second end cover into contact with a side wall of the stopper structure to implement positional regulation.

[0008] Preferably, the first end cover and the second end cover each have a rectangular structure, and adjacent end faces of the first end cover and the second end cover each have a straight line structure.

[0009] Preferably, the stopper structure is a rectangular structure.

[0010] Preferably, the stator assembly includes a slide base fixed to a side of the first guide rail away from the movable unit, and a first drive unit fixed to a side of the slide base close to the movable unit, and the movable assembly includes a base fixed to a side of the second guide rail away from the stator unit, and a second drive unit fixed to a side of the base close to the first drive unit, the second drive unit being provided directly opposite the first drive unit and spaced apart from it, and the first drive unit and the second drive unit generate thrust between each other to drive the second guide rail of the base and move it linearly along the first guide rail of the slide base.

[0011] Preferably, the stator assembly further includes a first position feedback device fixed to a side of the slide base adjacent to the movable unit, and the movable assembly further includes a second position feedback device fixed to a side of the base adjacent to the stator unit, the second position feedback device being disposed directly opposite the first position feedback device and spaced apart, and reading position information of the movable assembly relative to the stator assembly.

[0012] Preferably, the first drive unit includes a plurality of iron cores fixed to the slide base and arranged along the longitudinal direction of the first guide rail, and a drive coil wound around each of the iron cores, The second drive unit includes a magnetic yoke fixed to the base and a plurality of permanent magnets fixed to a side of the magnetic yoke adjacent to the drive coil, each of the permanent magnets facing the drive coil one by one at a distance.

[0013] Preferably, the first position feedback device is a scale reading head, and the second position feedback device is a scale, the scale being provided directly opposite the scale reading head with a gap therebetween. Effect of the Invention

[0014] Compared with the prior art, the direct drive transmission system of the present invention realizes linear motion by driving the movable unit by the stator unit, the two second guide rails of the movable unit abut against the two first guide rails of the stator unit respectively to form a sliding connection, the spacing between the first end cover of the stator unit and the second end cover of the movable unit is an orthogonal projection planar structure, the direct drive transmission system further includes a stopper structure fixed to the side of the stator assembly adjacent to the movable assembly, one end of the stopper structure adjacent to the second end cover is located between the two second end covers, the stator assembly drives the movable assembly to move the second guide rails to the guide rails, thereby bringing the second end cover into contact with the side wall of the stopper structure to implement position regulation. In this way, the spacing between the first end cover and the second end cover is flat, the structure is simple, and the manufacturing costs are low. At the same time, one end of the stopper structure is fixed to the movable member assembly and the other end of the stopper structure is located close to the second end cover, which increases the contact area between the side wall of the stopper structure and the second end cover, providing a high positional control effect and improving the reliability of the direct drive motor.

[0015] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. It is obvious that the drawings described below are only some embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without any creative work. [Brief description of the drawings]

[0016] [Figure 1]1 is a schematic perspective view showing a configuration of a direct drive transmission system according to the present invention; [Diagram 2] FIG. 1 is a schematic diagram showing an exploded configuration of a direct drive transmission system according to the present invention. [Diagram 3] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can obtain without creative labor are all included in the protection scope of the present invention.

[0018] 1 to 4, there is provided a direct drive transmission system 100. The direct drive transmission system 100 includes a mover unit 2 and a stator unit 1 that drives the movement of the mover unit 2.

[0019] The stator unit 1 includes a stator assembly 11, two first end covers 12 fixed to both opposing peripheral sides of the stator assembly 11, and two first guide rails 13 fixed to the side of the stator assembly 11 adjacent to the movable unit 2 and extending along the movement direction of the movable unit 2, the two first guide rails 13 being parallel to each other and spaced apart.

[0020] The mover unit 2 includes a mover assembly 21, two second end covers 22 fixed to both opposing circumferential sides of the mover assembly 21, and two second guide rails 23 fixed to the side of the mover assembly 21 close to the stator unit 1 and extending along the moving direction of the mover unit 2, the two second guide rails 23 being parallel and spaced apart, the two second end covers 22 being directly opposite the two first end covers 12 at a distance, the two second guide rails 23 abutting against the two first guide rails 13 respectively to form a sliding connection, and helping the mover unit 2 to perform linear motion in the stator unit 1. The spacing between the first end cover 12 and the second end cover 22 is a planar structure of orthogonal projection. The spacing between the first end cover 12 and the second end cover 22 is a flat surface, and the structure is simple and the manufacturing cost is low.

[0021] A primary magnetic field is generated by the stator assembly 11, which faces the mover assembly 21 and generates a thrust between the stator assembly 11 and the mover assembly 21, driving the second guide rail 23 of the mover unit 2 to perform linear motion on the first guide rail 13 of the stator unit 1.

[0022] Preferably, there are a plurality of stator units 1 and a plurality of mover units 2, the plurality of stator units 1 are provided facing the plurality of mover units 2 at intervals, and the plurality of stator units 1 drive the plurality of mover units 2 to realize circulatory linear motion. By adjusting the magnetic field driving direction of the stator unit 1, the movement direction of the mover unit 2 can be controlled.

[0023] The direct drive transmission system 100 further includes a stopper structure 3 fixed to the side of the stator assembly 11 adjacent to the mover assembly 21, one end of the stopper structure 3 adjacent to the second end cover 22 is located between the two second end covers 22, and the stator assembly 11 drives the mover assembly 21 to move the second guide rail 23 to the guide rail 13, thereby bringing the second end cover 22 into contact with the side wall of the stopper structure 3 to perform position regulation. In this way, the spacing surface between the first end cover 12 and the second end cover 22 is flat, the structure is simple, and the manufacturing cost is low. At the same time, one end of the stopper structure 3 is fixed to the mover assembly 21 and the other end of the stopper structure 3 is provided adjacent to the second end cover 22, which increases the contact area between the side wall of the stopper structure 3 and the second end cover 22, thereby enhancing the position regulation effect and improving the reliability of the direct drive motor.

[0024] In this embodiment, the first end cover 12 and the second end cover 22 are both rectangular in shape, and the adjacent end faces of the first end cover 12 and the second end cover 22 are linearly shaped, making the structures of the first end cover 12 and the second end cover 22 simple and reducing manufacturing costs.

[0025] In this embodiment, the stopper structure 3 is a rectangular structure, which serves to attach and fix one end of the stopper structure 3 to the mover assembly 21, and the other end of the stopper structure 3 corresponds to the stator assembly 11, forming a position-regulating contact on the side between the side wall of the stopper structure 3 and the two first end covers 12, thereby realizing a large area of ​​hard position regulation and improving the reliability of the direct drive motor.

[0026] Furthermore, the larger the contact area between the stopper structure 3 and the first end cover 12, the higher the reliability of the direct drive motor.

[0027] In this embodiment, the stator assembly 11 includes a slide base 111 fixed to the side of the first guide rail 13 away from the movable unit 2, and a first drive unit 112 fixed to the side of the slide base 111 close to the movable unit 2, and the movable assembly 21 includes a base 211 fixed to the side of the second guide rail 23 away from the stator unit 1, and a second drive unit 212 fixed to the side of the base 211 close to the first drive unit 112, and the second drive unit 212 is provided directly opposite the first drive unit 112 at a distance, and generates thrust between the first drive unit 112 and the second drive unit 212, driving the second guide rail 23 of the base to drive linear motion along the first guide rail 13 of the slide base 111. A driving thrust is generated between the first driving unit 112 and the second driving unit 212, thereby causing the base 211 fixed to the second driving unit 212 to move linearly under the action of the thrust. Naturally, when the base 211 is fixed, the slide base 111 is provided corresponding to the base 211, and a driving thrust is generated between the first driving unit 112 and the second driving unit 212, thereby causing the slide base 111 fixed to the first driving unit 112 to move linearly under the action of the thrust.

[0028] In this embodiment, the stator assembly 11 further includes a first position feedback device 113 fixed to a side of the slide base 111 adjacent to the mover unit 2, and the mover assembly 21 further includes a second position feedback device 213 fixed to a side of the base 211 adjacent to the stator unit 1, and the second position feedback device 213 is provided facing the first position feedback device 113 at a distance and is used to read position information of the mover assembly 21 relative to the stator assembly 11. By collecting position information between the first position feedback device 113 and the second position feedback device 213, the mover assembly 21 can be positioned with high positioning accuracy.

[0029] In this embodiment, the first driving unit 112 includes a plurality of iron cores 1121 fixed to the slide base 111 and arranged along the longitudinal direction of the first guide rail 13, and a driving coil 1122 wound around each of the iron cores 1121. When the plurality of driving coils 1122 generate current, the plurality of driving coils 1122 are activated to generate a traveling wave magnetic field, which is used to drive the motion of the second driving unit 212. The plurality of driving coils 1122 are fixed in the iron cores 1121 to increase the magnetic field of the driving coils 1122, thereby better driving the linear motion of the second driving unit 212.

[0030] Preferably, the multiple drive coils 1122 are arranged in parallel and uniformly spaced apart on the side of the iron core 1121 close to the second drive unit 212, so that the magnetic field is uniform and the magnetic field effect is high.

[0031] The second driving unit 212 includes a magnetic yoke 2121 fixed to the base 211, and a plurality of permanent magnets 2122 fixed to a side of the magnetic yoke 2121 close to the driving coil 1122, and each of the permanent magnets 2122 faces one of the driving coils 1122 at a distance. By fixing the plurality of permanent magnets 2122 to one side of the magnetic yoke 2121, the other side of the magnetic yoke 2121 is fixed to the base 211, and a magnetic field force is constantly generated by the plurality of permanent magnets 2122. When an appropriate current flows through the driving coil 1122, the driving coil 1122 generates a primary traveling wave magnetic field, and the permanent magnets 2122 generate a secondary magnetic field, generating a thrust between the driving coil 1122 and the permanent magnets 2122, so that the driving base 211 moves linearly on the slide base 111.

[0032] Preferably, a plurality of permanent magnets 2122 are fixed to the magnetic yoke 2121 in parallel and spaced apart relation to each other.

[0033] In this embodiment, the first position feedback device 113 is a scale reading head, and the second position feedback device 213 is a scale, which is provided facing the scale reading head at a distance from the scale reading head. The scale reading head is used to identify position information fed back from the scale, and makes it easy to position the mover unit 2 in real time.

[0034] The scale is an incremental scale, and the measurement principle of the scale is to modulate light into Moire fringes by two relatively moving gratings, and obtain the displacement change amount after counting and subdividing the Moire fringes, and then set one or more reference points on the scale grating to perform positioning. Preferably, the scale is attached to the mover unit 2, and the feedback position accuracy of the scale is high. By installing the scale and the reading head directly opposite each other, it is easy for the reading head to identify the scale information in real time, and the reading and writing efficiency is high, and the positioning effect is high.

[0035] Preferably, the scale is attached to the base 211 and the reading head is attached to the slide base 111, the scale is arranged directly opposite the scale reading head and is used to read the position information of the movable unit 2 in real time, making it easy to position the movable unit 2 in real time.

[0036] Preferably, the scale is a linear scale or a magnetic scale, which are low in cost, but the scale is not limited to being a linear scale or a magnetic scale.

[0037] Compared with the prior art, the direct drive transmission system of the present invention realizes linear motion by driving the movable unit by the stator unit, the two second guide rails of the movable unit abut against the two first guide rails of the stator unit respectively to form a sliding connection, the spacing between the first end cover of the stator unit and the second end cover of the movable unit is an orthogonal projection planar structure, the direct drive transmission system further includes a stopper structure fixed to the side of the stator assembly adjacent to the movable assembly, one end of the stopper structure adjacent to the second end cover is located between the two second end covers, the stator assembly drives the movable assembly to move the second guide rails to the guide rails, thereby bringing the second end cover into contact with the side wall of the stopper structure to implement position regulation. In this way, the spacing between the first end cover and the second end cover is flat, the structure is simple, and the manufacturing costs are low. At the same time, one end of the stopper structure is fixed to the movable member assembly and the other end of the stopper structure is located close to the second end cover, which increases the contact area between the side wall of the stopper structure and the second end cover, providing a high positional control effect and improving the reliability of the direct drive motor.

[0038] The above is only an embodiment of the present invention, and those skilled in the art may make various modifications without departing from the creative concept of the present invention, all of which are within the scope of protection of the present invention.

Claims

1. 1. A direct drive transmission system comprising: a mover unit and a stator unit for driving the movement of the mover unit; the stator unit includes a stator assembly, two first end covers fixed to opposite circumferential sides of the stator assembly, and two first guide rails fixed to a side of the stator assembly adjacent to the movable unit and extending along a moving direction of the movable unit, the two first guide rails being parallel to each other and spaced apart from each other; the movable unit includes a movable assembly, two second end covers fixed to both opposing peripheral sides of the movable assembly, and two second guide rails fixed to a side of the movable assembly adjacent to the stator unit and extending along a moving direction of the movable unit, the two second guide rails being parallel to each other and spaced apart, the two second end covers being directly opposite the two first end covers and spaced apart from each other, the two second guide rails abutting against the two first guide rails respectively to form a sliding connection, and end surfaces adjacent to each other of the first end cover and the second end cover have planar structures in orthogonal projection, The direct drive transmission system further includes a stopper structure fixed to a side of the stator assembly adjacent to the movable assembly, one end of the stopper structure adjacent to the second end cover is located between the two second end covers, and the stator assembly drives the movable assembly to move the second guide rail on the first guide rail, thereby bringing the second end cover into contact with a side wall of the stopper structure to implement positional regulation.

2. 2. The direct drive transmission system of claim 1, wherein said first end cover and said second end cover are both rectangular in structure.

3. 2. The direct drive transmission system of claim 1, wherein said stopper structure is a rectangular structure.

4. 2. The direct drive transmission system according to claim 1, wherein the stator assembly includes a slide base fixed to a side of the first guide rail away from the movable unit, and a first drive unit fixed to a side of the slide base close to the movable unit, the movable assembly includes a base fixed to a side of the second guide rail away from the stator unit, and a second drive unit fixed to a side of the base close to the first drive unit, the second drive unit being provided opposite the first drive unit and spaced apart from it, and the first drive unit and the second drive unit generate thrust forces against each other to drive the second guide rail of the base and cause it to move linearly along the first guide rail of the slide base.

5. 5. The direct drive transmission system according to claim 4, wherein the stator assembly further includes a first position feedback device fixed to a side of the slide base adjacent to the movable unit, and the movable assembly further includes a second position feedback device fixed to a side of the base adjacent to the stator unit, the second position feedback device being provided directly opposite the first position feedback device at a distance from the first position feedback device and reading the position of the movable assembly relative to the stator assembly.

6. the first drive unit includes a plurality of iron cores fixed to the slide base and arranged along a longitudinal direction of the first guide rail, and a drive coil wound around each of the iron cores, 5. The direct drive transmission system according to claim 4, wherein the second drive unit includes a magnetic yoke fixed to the base and a plurality of permanent magnets fixed to a side of the magnetic yoke adjacent to the drive coil.

7. 6. The direct drive transmission system according to claim 5, wherein the first position feedback device is a scale reading head, the second position feedback device is a scale, and the scale is provided directly opposite the scale reading head with a gap therebetween.

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