Magnetic coupling linear transmission device and linear driving motor adopting same

Abstract

The utility model provides a magnetic coupling linear transmission device and a linear driving motor using the same, the magnetic coupling linear transmission device comprises a guide pipe, a lead screw shaft, a magnetic coupling lead screw nut and a magnetic coupling sliding sleeve, the magnetic coupling linear transmission device is characterized in that the wall of the guide pipe is provided with a guide slideway penetrating along the axial direction, the lead screw shaft is coaxially arranged in the guide pipe, and the magnetic coupling lead screw nut is arranged in the guide pipe. The magnetic coupling lead screw nut is contained between the lead screw shaft and the guide pipe, the magnetic coupling sliding sleeve is arranged on the outer surface of the guide pipe, and the magnetic coupling sliding sleeve synchronously forms linear motion along with the magnetic coupling lead screw nut in the axial direction of the guide pipe through magnetic attraction force. According to the mechanism, linear transmission is achieved through coaxial arrangement of the lead screw shaft and the guide pipe, the structure is compact, and occupied space is small; magnetic coupling transmission is adopted, and a transmission mechanism has an overload protection function; the lead screw transmission mechanism is arranged in the guide pipe, so that the influence of the use environment on the transmission mechanism can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of transmission and driving motor, specifically to a kind of linear transmission device of magnetic coupling and linear driving motor using the device. BACKGROUND

[0002] In the field of automation equipment, linear transmission device for converting rotary motion into linear motion is widely used, and traditional linear transmission device usually adopts separated screw rod and guide rail to realize rotary motion into linear motion, which has complex overall structure and is not suitable for application in limited space.

[0003] Chinese patent publication (announcement) No.CN220268334U discloses a novel integrated linear driver, which adopts coaxial screw rod and guide rail, and the rotation of nut sleeve and linear motion are realized by sliding of convex sliding block protruding from nut in axial opening guide groove of guide rail sidewall, which has simple structure and occupies less space, but the main problem of the patent is that: the guide rail sidewall is provided with opening guide groove, and the screw rod is exposed in working environment, which is easy to accumulate dust and rust on the surface of screw rod during long-term use, and has weak environmental adaptability and increases maintenance cost; the nut sleeve is directly connected with driving load, and mechanical deformation or damage is easy to occur when overload occurs; if driving load is in special environment of liquid or vacuum, driving load and screw rod transmission mechanism cannot be isolated. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of linear transmission device of magnetic coupling and linear driving motor using the device to solve the defects in the prior art.

[0005] To solve the above technical problems, the utility model adopts the technical scheme to provide a kind of linear transmission device of magnetic coupling, which at least includes guide pipe, screw rod shaft, magnetic coupling screw nut and magnetic coupling sliding sleeve. Its features are that: the guide pipe adopts seamless pipe and is provided with axial through guide slide; the screw rod shaft is coaxially arranged in the guide pipe; the magnetic coupling screw nut is composed of screw nut and nut magnetic coupling body engaged with the screw rod shaft, and is accommodated between the screw rod shaft and the guide pipe; the magnetic coupling screw nut is provided with nut guide part matched with the guide slide, and the nut guide part is used to prevent the magnetic coupling screw nut from rotating relative to the guide pipe; the magnetic coupling sliding sleeve is arranged on the outer surface of the guide pipe, and the magnetic coupling sliding sleeve is provided with sliding sleeve coupling magnet matched with the nut magnetic coupling body; the inner surface magnetic pole of the sliding sleeve magnetic coupling body is different from the outer surface magnetic pole of the nut magnetic coupling body; the magnetic coupling sliding sleeve moves synchronously along the axial direction of the guide pipe by magnetic attraction force between the magnetic coupling screw nut.

[0006] Further, the magnetic coupling sliding sleeve is provided with sliding sleeve guide part matched with the guide slide, and the sliding sleeve guide part is used to prevent the magnetic coupling sliding sleeve from rotating relative to the guide pipe.

[0007] Further, the nut magnetic coupling body adopts not less than one nut permanent magnet ring and nut magnetic conducting ring, the nut permanent magnet ring and the nut magnetic conducting ring are arranged in layers with interval and fixedly connected coaxially with the screw nut.

[0008] Further, the sliding sleeve coupling magnet adopts not less than one sliding sleeve permanent magnet ring and sliding sleeve magnetic conducting ring, the sliding sleeve permanent magnet ring and the sliding sleeve magnetic conducting ring are arranged in layers with interval and coaxial with the guide pipe.

[0009] Further, the nut magnetic conducting ring is provided with a nut magnetic conducting tooth groove along the outer edge.

[0010] Further, the sliding sleeve magnetic conducting ring is provided with a sliding sleeve magnetic conducting tooth groove along the inner edge.

[0011] Optionally, the screw nut comprises a gap-eliminating screw nut.

[0012] Optionally, the guide pipe is closed at both ends by sealing bearings.

[0013] The utility model also provides a linear drive motor with the magnetic coupling linear transmission device, including magnetic coupling linear drive device and drive motor, drive motor is rotary drive motor, the screw rod axle of magnetic coupling linear drive device is as the output shaft of drive motor, with drive motor rotor fixed connection, the guide pipe mechanical fixed connection of magnetic coupling linear drive device is in the surface of drive motor casing end cover.

[0014] Compared with the prior art, the utility model has the following advantages: the screw rod shaft and the guide pipe are coaxially arranged, the structure is compact and occupies less space; the magnetic coupling transmission is adopted, which can avoid overload damage and improve the safety of the equipment; the screw rod transmission mechanism is arranged in the guide pipe, which can reduce the influence of the use environment on the screw rod transmission mechanism, has a wide application environment range, and reduces the maintenance cost; in the case that the guide shaft is closed at one end, the driving load and the working environment of the screw rod transmission mechanism can be isolated from each other, and the driving load can be applied in special environments such as liquid and vacuum. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the utility model embodiment external view.

[0016] Figure 2 is the sectional structure schematic diagram of A-A direction.

[0017] Figure 3 is the sectional structure schematic diagram of B-B direction.

[0018] Figure 4 is the structure schematic diagram of magnetic coupling screw nut.

[0019] Figure 5 is the structure schematic diagram of magnetic coupling sliding sleeve.

[0020] Figure 6 is a schematic diagram of a partial structure section of an embodiment of a gap-eliminating screw-nut.

[0021] Figure 7 is a schematic diagram of a partial structure section of an embodiment of a linear driving motor using a magnetic coupling linear transmission device. DETAILED DESCRIPTION

[0022] Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are denoted by the same reference numerals regardless of the reference numerals, and redundant descriptions thereof will be omitted. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of the related known technology can obscure the gist of the embodiments disclosed in the present specification, a detailed description thereof will be omitted.

[0023] The utility model will be further introduced below by combining with the drawings and specific implementation examples.

[0024] According to an embodiment example of the magnetic coupling linear transmission device of the utility model, as shown in Figure 1 , Figure 2 , Figure 3 , it comprises a guide pipe 10, a screw shaft 20, a magnetic coupling screw nut 30 and a magnetic coupling sliding sleeve 40.

[0025] The guide pipe 10 adopts a seamless pipe and is fixedly installed through a hollow shaft coupling 11, and the inner and outer surfaces of the guide pipe 10 are provided with guide slides 12 penetrating in the axial direction of the guide pipe 10, wherein the guide slides 12 in the embodiment are divided into outer surface guide slides 12a and inner surface guide slides 12b, the outer surface guide slides 12a are semicircular grooves, and the inner surface guide slides 12b are semicircular protrusions, and in other embodiments, other suitable types of guide slides such as T-shaped grooves, planar guide rails and V-shaped guide rails can also be used.

[0026] The guide pipe 10 is provided with a front end cover 13 and a rear end cover 14 at both ends, the rear end cover 14 can be integrated with the hollow shaft coupling 11, and the front end cover 13 and the rear end cover 14 are provided with screw bearings 15 coaxial with the guide pipe 10, the screw bearings 15 can adopt sealed bearings, for supporting the screw shaft 20 and isolating the influence of the external environment on the internal moving mechanism of the guide pipe 10.

[0027] The screw shaft 20 is coaxially arranged in the guide pipe 10, the magnetic coupling screw nut 30 is composed of a screw nut 31 engaged with the screw shaft 20 and a nut magnetic coupling body 32, and is accommodated between the guide pipe 10 and the screw shaft 20.

[0028] The magnetic coupling nut 30 is provided with a nut guide part 33 matched with the inner surface guide slide 12b, which is used to prevent the magnetic coupling nut 30 from rotating in the guide pipe 10. In this embodiment, the nut guide part 33 is a semicircular groove matched with the inner surface guide slide 12b of the guide pipe 10.

[0029] The magnetic coupling sleeve 40 is arranged on the outer surface of the guide pipe 10. The magnetic coupling sleeve 40 is provided with a sleeve coupling magnet 42 matched with the nut magnetic coupling body 32. The inner surface magnetic pole of the sleeve magnetic coupling body 42 is different from the outer surface magnetic pole of the nut magnetic coupling body 32. The magnetic coupling sleeve 40 is axially synchronously moved along the guide pipe 20 by the magnetic attraction force between the magnetic coupling nut 30 and the magnetic coupling sleeve 40.

[0030] Since the magnetic coupling sleeve 40 and the magnetic coupling nut 30 are coupled by the non-contact magnetic attraction force, when the driving load installed on the magnetic coupling sleeve 40 is overloaded, the magnetic coupling nut 30 can be decoupled from the magnetic coupling sleeve 40, thereby avoiding the overload damage of the screw shaft 20 and the magnetic coupling nut 30.

[0031] The magnetic coupling sleeve 40 is provided with a sleeve guide part 43 matched with the outer surface guide slide 12a, which is used to prevent the magnetic coupling sleeve 40 from rotating relative to the guide pipe 10. In this embodiment, the sleeve guide part 43 is a circular convex structure matched with the outer surface guide slide 12a of the guide pipe 10. In other embodiments, the sleeve guide part 43 can also be an integrated self-lubricating material structure or a ball structure similar to a spline pair.

[0032] The structures of the magnetic coupling nut 30 and the magnetic coupling sleeve 40 are shown in Figure 4 , Figure 5 The magnetic coupling nut 30 is composed of a screw nut 31 and a nut magnetic coupling body 32. The nut guide part 33 is integrated with the screw nut 31 and arranged on the outer edge of the magnetic coupling nut 30. The nut magnetic coupling body 32 is composed of not less than one nut permanent magnet ring 34 and a nut magnetic conducting ring 35. The nut permanent magnet ring 34 and the nut magnetic conducting ring 35 are arranged in layers with a spacing and coaxially fixedly connected with the screw nut 31. The nut magnetic conducting ring 35 is made of ferromagnetic material.

[0033] The magnetic coupling sleeve 40 is composed of a sleeve shell 41, a sleeve coupling magnet 42, and a sleeve guide part 43. The sleeve shell 41 is connected with the driving load. The sleeve coupling magnet 42 is fixedly installed in the sleeve shell 41. The sleeve guide part 43 is fixedly arranged on the inner edge of the sleeve coupling magnet 42. The sleeve coupling magnet 42 is composed of a corresponding number of sleeve permanent magnet rings 44 and sleeve magnetic conducting rings 45 corresponding to the nut magnetic coupling body 32. The sleeve permanent magnet ring 44 and the sleeve magnetic conducting ring 45 are arranged in layers with a spacing and coaxially fixedly connected. The sleeve magnetic conducting ring 45 is made of ferromagnetic material.

[0034] To improve the accurate positioning of the mutual attraction of the magnetic coupling nut 30 and the magnetic coupling sleeve 40, the nut magnetic guide ring 35 can be provided with a nut magnetic guide slot 36 on the outer edge, and the sleeve magnetic guide ring 45 can be provided with a sleeve magnetic guide slot 46 on the inner edge. In the assembled magnetic coupling double motion combination motor, the nut magnetic guide slot 36 and the magnetic guide slot 46 correspond to each other in position.

[0035] In the magnetic coupling linear transmission device with a magnetic guide slot, only one of the nut guide part 33 or the sleeve guide part 43 is provided, and the magnetic attraction positioning effect between the magnetic guide slots can also achieve the effect that the magnetic coupling sleeve 40 relies on the magnetic attraction force between the magnetic coupling nut 30 and the magnetic coupling sleeve 40 to move synchronously with the magnetic coupling nut 30 along the guide tube axis.

[0036] To eliminate the influence of the gap between the nut and the screw thread on the linear reciprocating motion and improve the stability and precision of the transmission mechanism, the magnetic coupling nut 30 can adopt a gap-eliminating screw nut structure, Figure 6 is a partial structure sectional view schematic diagram of a gap-eliminating screw nut embodiment. The gap-eliminating screw nut structure is to add a secondary screw nut 37 and a tension spring 38 to the magnetic coupling nut 30. The secondary screw nut 37 is engaged with the screw shaft 20 and is accommodated between the guide tube 10 and the screw shaft 20. The outer edge of the secondary screw nut 37 is provided with a secondary nut guide part 39 matched with the inner surface guide slide 12b, which is used to prevent the secondary screw nut 37 from rotating in the guide tube 20. The tension spring 38 is arranged between the magnetic coupling nut 30 and the secondary screw nut 37. The magnetic coupling nut 30 and the secondary screw nut 37 are mutually away from each other by the action force of the compressed tension spring 38, so as to eliminate the gap.

[0037] A linear drive motor embodiment using a magnetic coupling linear transmission device is shown in Figure 7 The linear drive motor mainly includes a magnetic coupling linear drive device 100 and a drive motor 200. The drive motor 200 is a rotary drive motor. The screw shaft 20 in the magnetic coupling linear drive device 100 serves as the output shaft of the drive motor 200. One end of the screw shaft 20 is fixedly connected to the center axis position of the motor rotor 210 in the drive motor 200. The screw shaft 20 is supported in the guide tube 20 and the drive motor 200 through the screw bearing 15 and the internal bearing 230 of the drive motor 200. One end of the guide tube 20 of the magnetic coupling linear drive device 100 is mechanically fixedly connected to the shell end cover 220 of the drive motor 200 through the hollow connecting shaft 11. The rotation of the rotor 210 of the drive motor 200 can drive the magnetic coupling nut 30 to move linearly. The magnetic coupling sleeve 40 relies on the magnetic attraction force between the magnetic coupling nut 30 to move linearly synchronously with the magnetic coupling nut 30 along the guide tube 20 axis.

[0038] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application, therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A magnetically coupled linear transmission device, comprising at least a guide tube, a lead screw shaft, a magnetically coupled lead screw nut, and a magnetically coupled sliding sleeve, characterized in that: The guide tube is made of seamless tube and has a guide slide that runs through it axially. The lead screw shaft is coaxially disposed inside the guide tube. The magnetically coupled lead screw nut consists of a lead screw nut that meshes with the lead screw shaft and a nut magnetic coupler, and is housed between the lead screw shaft and the guide tube. The magnetically coupled lead screw nut has a nut guide portion that cooperates with the guide slide, and the nut guide portion is used to prevent the magnetically coupled lead screw nut from rotating relative to the guide tube. The magnetically coupled sliding sleeve is disposed on the outer surface of the guide tube. The magnetically coupled sliding sleeve has a sliding sleeve coupling magnet that cooperates with the nut magnetic coupler. The magnetic poles on the inner surface of the sliding sleeve magnetic coupler are different from the magnetic poles on the outer surface of the nut magnetic coupler. The magnetically coupled sliding sleeve moves synchronously with the magnetically coupled lead screw nut along the axial direction of the guide tube by means of the magnetic attraction between the sliding sleeve and the magnetically coupled lead screw nut.

2. The magnetically coupled linear transmission device according to claim 1, characterized in that, The magnetic coupling sleeve is provided with a sleeve guide portion that cooperates with the guide slide. The sleeve guide portion is used to prevent the magnetic coupling sleeve from rotating relative to the guide tube.

3. The magnetically coupled linear transmission device according to claim 1, characterized in that, The nut magnetic coupler uses at least one nut permanent magnet ring and one nut magnetic guide ring, which are stacked at intervals and fixedly connected to the lead screw nut coaxially.

4. A magnetically coupled linear transmission device according to claim 1, characterized in that, The sliding sleeve coupling magnet employs at least one sliding sleeve permanent magnet ring and one sliding sleeve magnetic guide ring, which are stacked at intervals and coaxial with the guide tube.

5. A magnetically coupled linear transmission device according to claim 3, characterized in that, The outer edge of the nut magnetic ring is provided with nut magnetic tooth grooves.

6. A magnetically coupled linear transmission device according to claim 4, characterized in that, The inner edge of the sliding sleeve magnetic ring is provided with a sliding sleeve magnetic tooth groove.

7. A magnetically coupled linear transmission device according to claim 1, characterized in that, The lead screw nut includes a backlash-free lead screw nut.

8. A magnetically coupled linear transmission device according to claim 1, characterized in that, The guide tube is sealed at both ends with sealed bearings.

9. A linear drive motor, comprising the magnetically coupled linear drive device and the drive motor of claim 1, characterized in that: The drive motor is a rotary drive motor; the lead screw of the magnetically coupled linear drive device serves as the output shaft of the drive motor, and the lead screw is fixedly connected to the rotor of the drive motor; the guide tube of the magnetically coupled linear drive device is mechanically fixedly connected to the surface of the end cover of the drive motor housing.

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