Cylindrical material conveying device based on horizontal linear motor

Abstract

The invention discloses a cylindrical material conveying device based on a horizontal linear motor, and belongs to the field of mechanical design and manufacture, the device comprises a magnetic flux switching linear motor, a stator supporting device, a material supporting device, a material pushing device and a sensor device, and the magnetic flux switching linear motor is a driving source and is of a horizontal bilateral structure; the reinforcing ribs in the stator supporting structure adopt a dual-function coupling design, so that the cost can be reduced and the efficiency can be improved; the material supporting device is fixedly connected with the stator supporting structure and is in linear contact with the cylindrical material; the pushing device is fixedly connected with the linear motor rotor and is connected with the stator supporting structure through a linear guide rail sliding block; the sensor device is located on one side of the linear motor, and a signal line is of a spring coil structure. The rotor is simple in structure, easy to maintain, good in natural heat dissipation effect, compact in overall structure and high in space utilization rate, and the problems that an existing same-type cylindrical material conveying device is complex in rotor structure, poor in natural heat dissipation effect and low in overall structure space utilization rate are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of mechanical design and manufacturing, and particularly relates to a cylindrical material conveying device based on a horizontal linear motor. BACKGROUND

[0002] In an intelligent manufacturing ecology driven by Industry 4.0, a cylindrical material conveying device as a core functional module of an automated material handling system directly determines the overall reliability of intelligent warehousing and flexible production lines. Currently, four types of technical solutions, i.e., a roller type, a belt type, a chain type transmission and a linear motor direct drive, are generally used to realize directional transmission of cylindrical materials. The linear motor direct drive architecture has significant advantages in system energy efficiency and dynamic response because it eliminates the mechanical transmission chain (intermediate conversion mechanisms such as gears / links). However, the technology still has the following key defects:

[0003] Motor body problem: In the motor selection of the cylindrical material conveying device, the industry mainstream adopts two schemes of an induction motor and a permanent magnet synchronous linear motor. The induction motor is widely used due to its simple structure, but has inherent defects such as low efficiency and complex control algorithm. Although the permanent magnet synchronous linear motor has technical advantages such as high efficiency and high power density, it faces reliability challenges such as easy falling of secondary permanent magnets and high-temperature demagnetization in high-load scenarios, which directly affect the long-term operation stability of the system.

[0004] Space utilization problem: The current cylindrical material conveying device based on a double-sided linear motor generally adopts a vertical structure (the linear motor is arranged vertically to the ground), but the material supporting device and the reinforcing ribs of the stator support plate need to be independently set in this design, and the reinforcing ribs only bear the supporting function without collaborative design with the material supporting device, which fails to realize functional integration, resulting in overall layout redundancy and low space utilization. In addition, in the current cylindrical material conveying device driven by a linear motor, the sensor signal line generally uses a standard nylon drag chain, and the space redundancy (large swing amplitude and high bending radius requirement) generated by the nylon drag chain in reciprocating motion is also a major pain point.

[0005] Motor heat dissipation problem: In the natural heat dissipation scenario, the directionality of air convection has a decisive influence on the cooling efficiency of the motor. The air flow in the natural environment mainly presents a horizontal direction characteristic (such as the conventional wind direction), and the vertical axial layout of the vertical motor is orthogonal to the ground. This orthogonal structure design causes the horizontal air flow to fail to effectively penetrate the internal heat dissipation channel of the motor, resulting in poor natural heat dissipation effect.

[0006] Friction loss problem: In the current industrial practice, the material supporting device of the cylindrical material conveying device using a double-sided linear motor generally adopts full-surface contact or local-surface contact, and the surface contact causes large friction loss between the material supporting device and the cylindrical material. SUMMARY

[0007] The application provides a cylindrical material conveying device based on a horizontal linear motor.

[0008] The technical scheme for achieving the object of the application is as follows: a cylindrical material conveying device based on a horizontal linear motor, comprising a flux switching linear motor, a stator support device, a material supporting device, a material pushing device, a sensor device and a control system; the flux switching linear motor comprises a stator, a mover, permanent magnets and stator windings, and is used as a power source of the cylindrical material conveying device; the stator support device is arranged below the flux switching linear motor and is used for supporting the stator; the material supporting device is arranged above the stator support device and is used for supporting the material; the material pushing device is connected with the mover and moves with the mover to push the material forward; the sensor device is used for collecting the position signal of the mover in real time and feeding back to the control system; and the control system controls the flux switching linear motor to move together with the material pushing device according to the collected position information of the mover, so as to push the material forward.

[0009] Preferably, the stator support device comprises a lower machine shell, an upper machine shell, a stator limiting strip, a linear guide rail, a reinforcing rib and an end support plate; the lower machine shell is fixedly connected with the bottom of the stator through a T-shaped groove; and the upper machine shell is fixedly connected with the top of the stator through a T-shaped groove.

[0010] The ends of the lower machine shell and the upper machine shell are fixedly connected with the two ends of the end support plate respectively; two linear guide rails are arranged on the upper surface of the lower machine shell; and one stator limiting strip is arranged at the end of the T-shaped groove of the lower machine shell and the upper machine shell in the same direction.

[0011] Preferably, four reinforcing ribs are arranged above the upper machine shell.

[0012] Preferably, a T-shaped groove is formed in the upper surface of the lower machine shell, and a through hole is formed in the T-shaped groove and used for fixing to an external workbench; the stator limiting strip is used for sealing the T-shaped groove; and the reinforcing rib adopts a round-corner strip topology and has the dual functions of material supporting and reinforcing.

[0013] Preferably, the material supporting device comprises a material supporting rod support frame and a material supporting rod; the material supporting rod support frame is arranged above the upper machine shell, and the bottom of the material supporting rod support frame is fixedly connected with the reinforcing rib of the upper machine shell; and the material supporting rod is fixedly connected with the material supporting rod support frame.

[0014] Preferably, the material pushing device comprises a material pushing plate, a sliding block, a threaded column, a limiting block and two side plates; the material pushing plate is arranged between the tops of the two side plates; the limiting block is arranged between the mover and the two side plates respectively; the two ends of the threaded column are fixedly connected with the mover, the limiting block and the two side plates respectively; the bottom of the two side plates is provided with the sliding block, and the sliding block is arranged on the linear guide rail.

[0015] Preferably, the threaded column is internally threaded only at the ends; the limiting block is provided with a lightened square hole; the threaded column is transitionally fitted with the light hole, and the threaded column is fixed at both ends by bolts and bolt washers.

[0016] Preferably, the sensor device comprises a magnetic scale head, a sensor connector, a magnetic scale, a rod seat, a coil support rod and a spring coil; the magnetic scale head is fixedly connected with the sensor connector; the sensor connector is arranged at the bottom center of the side plate; the magnetic scale is installed on the upper surface of the lower casing and located directly below the magnetic scale head; the rod seat is fixed at the front and rear ends of one side of the lower casing; the coil support rod is assembled in the through hole of the rod seat at both ends; and the spring coil is installed on the coil support rod.

[0017] Preferably, the bottom of the sensor connector is provided with two slot-shaped through holes for adjusting the gap between the magnetic scale head and the magnetic scale; and the spring coil is telescopic along the direction of the coil support rod.

[0018] Preferably, the magnetic flux switching linear motor is horizontally placed, the stator adopts a double-sided structure, the single-sided pole number is 27 poles, the stator core is a U-shaped unit structure and its tail is T-shaped, the T-shaped structure is fitted with the T-shaped slot of the upper and lower casings; the mover is a pure iron core salient pole structure with a pole number of 5 poles; the permanent magnet is alternately positively and negatively magnetized; and the stator winding adopts a concentrated winding.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The mover of the linear motor of the present application is free of coils and permanent magnets, and is a pure iron core structure, which can reduce maintenance costs.

[0021] 2. In the present application, the reinforcing rib adopts a round-corner strip topology, which realizes a dual-function coupling design: firstly, it serves as a reinforcing rib of the upper casing, which can enhance the bending stiffness of the casing and resist the influence of the magnetic force of the single side of the motor; secondly, the round-corner profile forms a line contact with the surface of the cylindrical material, which can form a supporting interface at the bottom of the cylindrical material and has a material supporting function, so that one rib has two functions, thereby effectively improving the space utilization.

[0022] 3. The present application uses a spring coil instead of a standard nylon drag chain, which fundamentally avoids the problem of large swing amplitude and high bending radius requirement of the nylon drag chain, and can effectively improve the space utilization.

[0023] 4. The linear motor of the present application is horizontally placed, and compared with the vertical placement, the horizontal motor can form a smoother convection path because its axis is parallel to the main airflow direction, which can improve its heat dissipation performance in the natural heat dissipation scenario.

[0024] 5. In this invention, the reinforcing ribs and the material support rods are in line contact with the cylindrical material. Compared with material support devices that have full or partial surface contact, this can reduce the contact area and reduce friction loss.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a two-dimensional topology diagram of a bilateral flux-switching linear motor.

[0028] Figure 3 This is a three-dimensional structural diagram of the stator support device.

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper casing.

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the material support device.

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the feeding device.

[0032] Figure 7 This is a three-dimensional structural diagram showing the positional relationship between the pusher and the mover.

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the sensor device.

[0034] In the diagram: 1-Fluid flux switching linear motor; 11-Stator; 12-Motor; 13-Permanent magnet; 14-Stator winding; 2-Stator support device; 21-Lower housing; 22-Upper housing; 23-Stator limit bar; 24-Linear guide rail; 25-Reinforcing rib; 26-End support plate; 3-Material support device; 31-Material support plate support frame; 32-Material support rod; 4-Pushing device; 41-Pushing plate; 42-Slider; 43-Threaded column; 44-Limit block; 5-Sensor device; 51-Magnetic grating head; 52-Sensor connector; 53-Magnetic grating ruler; 54-Rod base; 55-Coil support rod; 56-Spring coil. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be described in detail, clearly and completely below with reference to the accompanying drawings:

[0036] like Figure 1 As shown, the present invention provides a cylindrical material conveying device based on a horizontal linear motor, comprising: a flux-switching linear motor (1), a stator support device (2), a material support device (3), a material pusher device (4), a sensor device (5), and a control system (6).

[0037] The magnetic flux switching linear motor (1) comprises a stator (11), a mover (12), a permanent magnet (13) and a stator winding (14); wherein the stator (11) and the mover (12) use the grade 50JN470 silicon steel sheet, the permanent magnet (13) uses the grade N42UH, and the stator winding (14) uses 3 strands of 1mm diameter copper wire;

[0038] The stator support device (2) comprises a lower casing (21), an upper casing (22), a stator limiting strip (23), a linear guide rail (24), a reinforcing rib (25) and an end support plate (26), wherein the lower casing (21), the upper casing (22), the stator limiting strip (23) and the end support plate (26) are made of 6061 aluminum, and the reinforcing rib (25) is made of 45 steel;

[0039] The material of the material supporting rod support frame (31) and the material supporting rod (32) is 45 steel;

[0040] The pushing device (4) comprises a pushing plate (41), a sliding block (42), a threaded column (43), a limiting block (44) and a side plate (45); wherein the pushing plate (41) and the limiting block (44) are made of 6061 aluminum, and the threaded column (43) is made of 40 chromium;

[0041] The sensor device (5) comprises a magnetic grid head (51), a sensor connecting piece (52), a magnetic grid ruler (53), a rod seat (54), a coil support rod (55) and a spring coil (56), wherein the sensor connecting piece (52) and the rod seat (54) are made of 6061 aluminum, and the coil support rod (55) is made of a carbon fiber rod;

[0042] The magnetic flux switching linear motor (1) is installed horizontally, and compared with vertical installation, the horizontal motor can form a smoother convection path because its axis is parallel to the main air flow direction, which makes the horizontal structure have an innate advantage in natural convection heat dissipation performance.

[0043] As shown in Figure 2 The stator (11) is a double-sided structure, which can make the single-sided magnetic pull force of the mover (12) zero, the single-sided pole number is 27 poles, the stator core structure is a U-shaped unit structure with a T-shaped connecting structure; the mover (12) is a pure core salient pole structure with 5 poles; the permanent magnet (13) is alternately magnetized in positive and negative directions; and the stator winding (14) adopts a concentrated winding.

[0044] As shown in Figures 3-4As shown, the lower shell (21) upper surface is provided with a T-shaped groove, which can be matched with the T-shaped connecting structure of the stator (11), and a through hole is provided on the T-shaped groove for fixing on the external workbench;

[0045] The upper shell (22) is provided with a T-shaped groove on its lower surface, which can be matched with the T-shaped connecting structure of the stator (11), and its upper surface is fixed with the reinforcing rib (25) by bolts; the stator limiting strip (23) is fixed with the upper and lower shells by bolts;

[0046] The linear guide rail (24) is fixed on the upper surface of the lower shell (21) by bolts;

[0047] The reinforcing rib (25) adopts a round bar topology configuration, and its round corner profile forms a precise line contact with the surface of the cylindrical material, which simultaneously realizes the coupling of two functions: as a shell bending stiffness enhancement unit and forms a cylindrical material bottom support interface, which can improve the space utilization rate;

[0048] The end support plate (26) is connected between the upper and lower shells by bolts.

[0049] As shown in Figure 5 The material supporting rod support frame (31) is provided with a semicircular socket at the top and is fixed with the reinforcing rib (25) at the bottom by welding; the material supporting rod (32) is installed in the semicircular socket of the material supporting rod support frame (31) and is fixed therewith by welding. This structure restricts the precise line contact between the material supporting rod and the middle part of the cylindrical material, effectively inhibits the radial deviation during material conveying, and ensures that the material axis positioning accuracy meets the working condition requirements;

[0050] The reinforcing rib (25) and the material supporting rod (32) are in line contact with the cylindrical material, which can reduce the contact area and friction loss compared with the surface contact material supporting device.

[0051] As shown in Figure 6 The push plate (41) is fixed with the side plate (45) on both sides by bolts; the sliding block (42) is installed on the linear guide rail (241), and the sliding block (42) is installed on the linear guide rail (24); the threaded column (43) is provided with internal threaded holes at both ends; the limiting block (44) is provided with four weight-reducing square holes, and is located between the mover and the side plate; the bottom of the side plate (45) is fixed with the sliding block (42) by bolts;

[0052] The mover (12), limiting block (44) and side plate (45) are each provided with four circular through holes, and the four through holes of different parts are horizontally aligned, the threaded column (43) needs to be transitionally matched with the through holes to enhance its shear capacity, and the threaded column (43) is fixed at both ends by bolts.

[0053] As shown in Figure 3 andFigures 6-8 As shown, the magnetic grating head (51) is fixed to the sensor connector (52) by bolts; the sensor connector (52) is fixed to the bottom center of the side plate (45) by bolts, and has two slotted through holes at the bottom, which can be adjusted up and down by bolts to adjust the height of the sensor.

[0054] The magnetic scale (53) is an absolute magnetic scale, which is attached to the upper surface of the lower housing (21) and located directly below the magnetic scale head (51); the rod seat (54) is fixed to the axial end of one side of the lower housing (21) by bolts; the two ends of the coil support rod (55) are assembled in the through holes of the rod seat (541-542); the spring coil (56) is installed on the coil support rod (55) and can extend and retract along the rod direction; the signal line between the spring coil (56) and the magnetic scale head (51) can be glued to the wire hole of the side plate (45).

[0055] The control system (6) is not shown in the figure. The control strategy adopted is vector control, and the DSP chip used is TMS320F28377D.

[0056] The specific working process is as follows: after power-on, the control system (6) reads the current position of the mover (12) through the absolute magnetic scale (53), and then the control system (6) controls the mover (12) to move to the initial position (e.g., Figure 1 At the leftmost end), the cylindrical material is placed into the material support device (3), and the control system starts to control the movement of the mover (12). When the mover (12) moves from the leftmost end, the cylindrical material is placed into the material support device (3). Figure 1 When the leftmost end moves to the right to the 2 / 3 position, the control system (6) starts to control the mover (12) to decelerate. At this time, the cylindrical material continues to move forward by its own inertia, thus completing the conveying of the cylindrical material. In the remaining 1 / 3 distance, the mover (12) will decelerate to 0 and then move in the opposite direction to the initial position, waiting for the next round of conveying instructions.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cylindrical material conveying device based on a horizontal linear motor, characterized in that, include: The system comprises a flux-switching linear motor (1), a stator support device (2), a material support device (3), a material pusher device (4), a sensor device (5), and a control system (6). The flux-switching linear motor (1) includes a stator (11), a mover (12), a permanent magnet (13), and a stator winding (14). The flux-switching linear motor (1) is used as the power source for the cylindrical material conveying device. The stator support device (2) is located below the flux-switching linear motor (1) and is used to support the stator (11). The material support device (3) is installed above the stator support device (2) and is used to carry materials. The material pusher device (4) is connected to the mover (12) and moves with the mover (12) to push the materials forward. The sensor device (5) is used to collect the position signal of the mover (12) in real time and feed it back to the control system (6). The control system (6) controls the flux-switching linear motor (1) to drive the material pusher device (4) to move together according to the collected position information of the mover (12), thereby pushing the materials forward.

2. The cylindrical material conveying device based on a horizontal linear motor according to claim 1, characterized in that, The stator support device (2) includes a lower housing (21), an upper housing (22), a stator limiting strip (23), a linear guide rail (24), a reinforcing rib (25), and an end support plate (26); the lower housing (21) is fixedly connected to the bottom of the stator (11) through a T-slot; the upper housing (22) is fixedly connected to the top of the stator (11) through a T-slot; The ends of the lower housing (21) and the upper housing (22) are fixedly connected to the two ends of the end support plate (26); the upper surface of the lower housing (21) is provided with two linear guide rails (24), and the T-slots of the lower housing (21) and the upper housing (22) are each provided with a fixed limiting strip (23) at one end.

3. The cylindrical material conveying device based on a horizontal linear motor according to claim 2, characterized in that, Four reinforcing ribs (25) are provided on the upper part of the upper housing (22).

4. The cylindrical material conveying device based on a horizontal linear motor according to claim 2, characterized in that, The upper surface of the lower housing (21) has a T-shaped groove with a through hole for fixing to an external workbench; the stator limiting strip (23) is used to seal the opening of the T-shaped groove; the reinforcing rib (25) adopts a rounded strip topology and has the dual functions of supporting material and serving as a reinforcing rib.

5. The cylindrical material conveying device based on a horizontal linear motor according to claim 2, characterized in that, The material support device (3) includes a material support rod support frame (31) and a material support rod (32); the material support rod support frame (31) is located above the upper housing (22), and the bottom of the material support rod support frame (31) is fixedly connected to the reinforcing rib (25) of the upper housing (22); the material support rod (32) is fixedly connected to the material support rod support frame (31).

6. The cylindrical material conveying device based on a horizontal linear motor according to claim 1, characterized in that, The pushing device (4) includes a pushing plate (41), a slider (42), a threaded column (43), a limiting block (44), and two side plates (45); the pushing plate (41) is disposed between the tops of the two side plates (45); the limiting block (44) is disposed between the mover (12) and the two side plates (45), and the two ends of the threaded column (43) pass through the mover (12) and the limiting block (44) respectively and are fixedly connected to the two side plates (45); the bottom of the two side plates (45) is provided with a slider (42), and the slider (42) is mounted on the linear guide rail (24).

7. The cylindrical material conveying device based on a horizontal linear motor according to claim 6, characterized in that, The threaded column (43) has internal threaded holes at both ends; the limiting block (44) has a weight-reducing square hole; the threaded column (43) and the smooth hole form a transition fit, and the two ends of the threaded column (43) are fixed by bolts and bolt washers.

8. The cylindrical material conveying device based on a horizontal linear motor according to claim 1, characterized in that, The sensor device (5) includes a magnetic grating head (51), a sensor connector (52), a magnetic grating ruler (53), a rod base (54), a coil support rod (55), and a spring coil (56); the magnetic grating head (51) is fixedly connected to the sensor connector (52); the sensor connector (52) is located at the bottom center of the side plate (45); the magnetic grating ruler (53) is installed on the upper surface of the lower housing (21) and located directly below the magnetic grating head (51); the rod base (54) is fixed at both ends of one side of the lower housing (21); both ends of the coil support rod (55) are assembled in the through holes of the rod base (54); the spring coil (56) is installed on the coil support rod (55).

9. The cylindrical material conveying device based on a horizontal linear motor according to claim 1, characterized in that, The sensor connector (52) has two slotted through holes at the bottom for adjusting the gap between the magnetic grating head (51) and the magnetic grating ruler (53); the spring coil (56) extends and retracts along the direction of the coil support rod (55).

10. The cylindrical material conveying device based on a horizontal linear motor according to claim 1, characterized in that, The flux switching linear motor (1) is placed horizontally. The stator (11) adopts a double-sided structure with 27 poles on each side. The stator core is a U-shaped unit structure with a T-shaped tail. The T-shaped structure is matched with the T-shaped slots of the upper and lower housings. The mover (12) is a pure iron core salient pole structure with 5 poles. The permanent magnet (13) is alternately magnetized in the positive and negative directions. The stator winding (14) adopts a concentrated winding.

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