Permanent magnet synchronous linear motor servo tightening module

Abstract

A kind of permanent magnet synchronous linear motor servo tightening module, including pedestal, stator assembly, first mobile structure, second mobile structure, tool mounting seat, tightening tool, nail feeding module, the top of pedestal is provided with accommodating groove, two inner walls of accommodating groove are fixed with first guide rail;Stator assembly is fixed in the bottom of the inboard of accommodating groove of pedestal;Tool mounting seat is fixed on second mobile structure;Tightening tool is fixed on tool mounting seat;Nail feeding module is fixed on first mobile structure;First mobile structure includes first structural member, and mobile sub-assembly is arranged in first structural member, second guide rail is arranged in the both sides of first structural member, first structural member is respectively provided with two steel ball accommodating hole, first structural member is fixed with ball return device at the both ends of second guide rail, ball return device is communicated with the arc-shaped groove of steel ball accommodating hole and second guide rail, steel ball accommodating hole, ball return device and second guide rail and first guide rail are filled with steel ball between them.The application has simple structure, small size and is easy to use.

Description

Technical Field

[0001] This application relates to the field of mass production technology of threaded fasteners, and in particular to a permanent magnet synchronous linear motor servo tightening module. Background Technology

[0002] With industrial development and the advancement of intelligent manufacturing, higher requirements have been placed on the automation, digitalization, and traceability of production processes.

[0003] Existing technologies mainly rely on manual methods for picking up, aligning, and tightening screws, which is slow and a bottleneck in the production line. Manual operation is prone to problems such as stripped screws, missed screws, insufficient torque, and excessive screw height. Even if some mechanical equipment is used, it mainly relies on ball screws, reducers, balls, sliders, and guide rails for tightening, resulting in a large overall size of the equipment and inconvenience in use.

[0004] To address this, we propose a permanent magnet synchronous linear motor servo tightening module. Utility Model Content

[0005] To address the shortcomings of existing production technologies, the applicant provides a permanent magnet synchronous linear motor servo tightening module. This module moves the screw feeding module via a first moving part, thereby moving the screw and feeding tube to the required position. The second moving part moves the tightening tool and simultaneously activates it to tighten the screw. The silent cover plate can isolate some noise, effectively reducing noise levels.

[0006] The technical solution adopted in this application is as follows: A permanent magnet synchronous linear motor servo tightening module includes: The base has a receiving groove on its top, and the two inner walls of the receiving groove are fixed with first guide rails. The stator assembly is fixed to the bottom of the receiving groove in the base; The first and second moving parts are movably mounted in the receiving groove of the base; Tool mounting base, fixed to the second moving part structure; Tighten the tool to secure it to the tool mounting base; The nail feeding module is fixed on the first moving part structure. The nail feeding module includes a nail feeding tube, and the output end of the tightening tool is movably disposed in the nail feeding tube. The first moving part structure includes a first structural component, a moving part assembly is provided inside the first structural component, a second guide rail is provided on both sides of the first structural component, both the second and first guide rails are provided with arc-shaped grooves, the first structural component is provided with two steel ball receiving holes, and ball return devices are fixed at both ends of the first structural component and the second guide rails. The ball return devices are connected to the steel ball receiving holes and the arc-shaped grooves of the second guide rails. The steel ball receiving holes, the ball return devices, and the space between the second and first guide rails are all filled with steel balls. The first and second mover structures are identical.

[0007] Its further features are: The stator assembly includes a mounting plate and permanent magnets. Multiple permanent magnets are provided and fixed at intervals on the mounting plate. The mounting plate is fixed to the bottom of the receiving groove of the base.

[0008] The moving part assembly includes a first iron core and a first winding. The first winding is disposed on the first iron core, and the first structural component and the first iron core are connected and fixed by a first connector.

[0009] A linear encoder is also fixed to the bottom of the receiving groove of the base.

[0010] It also includes two brake assemblies, used to brake the first and second moving parts respectively.

[0011] The brake assembly includes a brake and a brake guide rail. The brake guide rail is fixedly connected to the base. The brake on the first moving part is fixedly connected to the first structural member, and the brake on the second moving part is fixedly connected to the second structural member.

[0012] The first structural component has an arc-shaped protrusion at the top, and a silent cover plate is placed on the arc-shaped protrusion of the first structural component. The silent cover plate is fixedly connected to the base. The first structural component has mounting platforms at both ends of the arc-shaped protrusion. The height of the mounting platforms is greater than the height of the arc-shaped protrusion. Tool mounting seats are fixed on the mounting platforms of the first structural component.

[0013] Rolling bearings are provided at both ends of the arc-shaped protrusion of the first structural component.

[0014] The first structural component is equipped with heat dissipation channels inside.

[0015] Photoelectric sensors are installed at both ends of the base.

[0016] The beneficial effects of this application are as follows: This application features a compact and reasonable structure, and is easy to operate. The screw is placed into the feeding tube, and a servo driver controls the movement of the first moving substructure. The first moving substructure drives the feeding module, thus moving the screw and feeding tube to the desired position. The servo driver then controls the movement of the second moving substructure, which, through the tool mounting base, moves the tightening tool, simultaneously activating it to tighten the screw. A silent cover plate isolates some noise, effectively reducing overall noise levels.

[0017] In addition, this application also has the following advantages: (1) The first structural component is provided with two steel ball receiving holes. The first structural component is fixed with ball return devices at both ends of the second guide rail. The ball return devices connect the steel ball receiving holes and the arc-shaped grooves of the second guide rail. The steel ball receiving holes, the ball return devices, and the space between the second and first guide rails are all filled with steel balls. When the first moving part moves, the steel balls flow out from the ball return device at one end between the second and first guide rails, and the steel balls flow into the space between the second and first guide rails from the ball return device at the other end. Through the cooperation of the second guide rail, the first guide rail, and the steel balls, the friction is effectively reduced.

[0018] (2) Both the first and second structural components have arc-shaped protrusions on their tops, and the same noise-reducing cover is placed on the arc-shaped protrusions of both components. The noise-reducing cover is fixedly connected to the base. The noise is reduced by the noise-reducing cover. Rolling bearings are provided at both ends of the arc-shaped protrusions of both the first and second structural components, which can further reduce friction and improve transmission efficiency.

[0019] (3) Both the first and second structural components are equipped with heat dissipation channels, which greatly improves the thrust density and power density of the linear motor in products of the same volume.

[0020] (4) A linear encoder is also fixed at the bottom of the inner side of the receiving groove of the base 1. The linear motor, through the precision controller of the servo driver, cooperates with the feedback of the linear encoder to make the whole servo system form a closed loop system, which can achieve a reciprocating positioning accuracy of 0.005mm. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this application.

[0022] Figure 2 This is an explosion diagram of this application.

[0023] Figure 3 This is a schematic diagram of the explosion of the first moving part structure in this application.

[0024] Figure 4 This is a schematic diagram of the first moving part structure of this application.

[0025] Figure 5 for Figure 4 Schematic diagram of the AA section.

[0026] Figure 6 for Figure 5 Schematic diagram of the cross-section of BB.

[0027] Figure 7 This is a schematic diagram of the explosion of the second moving part structure in this application.

[0028] Figure 8 This is a schematic diagram of the second moving part structure of this application.

[0029] Figure 9 for Figure 8 Schematic diagram of the CC section.

[0030] Figure 10 for Figure 8 Schematic diagram of the DD cross section.

[0031] Figure 11 for Figure 10 Schematic diagram of the EE cross section.

[0032] Figure 12 This is a schematic diagram of the stator structure of this application.

[0033] The components include: 1. Base; 2. First guide rail; 3. Stator assembly; 4. Linear encoder; 5. Brake assembly; 6. First mover structure; 7. Second mover structure; 8. Tool mounting base; 9. Tightening tool; 10. Nail feeding module; 11. Silent cover plate; 12. Photoelectric sensor; 301. Mounting plate; 302. Permanent magnet; 501. Brake; 502. Brake guide rail; 601. First structural component; 602. First connecting component; 603. First iron core; 604. First winding; 605. Second guide rail; 701. Second structural component; 702. Second connecting component; 703. Second iron core; 704. Second winding; 705. Third guide rail; 1001. Nail feeding mounting base; 1002. Nail feeding tube. Detailed Implementation

[0034] The specific embodiments of this application are described below with reference to the accompanying drawings.

[0035] like Figures 1-12 As shown, a permanent magnet synchronous linear motor servo tightening module includes a base 1, a first guide rail 2, a stator assembly 3, a linear encoder 4, a brake assembly 5, a first mover structure 6, a second mover structure 7, a tool mounting base 8, a tightening tool 9, a nail feeding module 10, a silent cover plate 11, and a photoelectric sensor 12.

[0036] The base 1 has a receiving groove at its top. The two inner walls of the receiving groove are fixed with first guide rails 2.

[0037] The stator assembly 3 is fixed in the receiving groove of the base 1.

[0038] Specifically, the stator assembly 3 includes a mounting plate 301 and permanent magnets 302. Multiple permanent magnets 302 are provided and are fixed at intervals on the mounting plate 301. The mounting plate 301 is fixed to the bottom of the receiving groove inside the base 1. That is, the stator assembly 3 is fixed to the bottom of the receiving groove inside the base 1.

[0039] The first moving part structure 6 and the second moving part structure 7 are respectively slidably disposed in the receiving groove of the base 1.

[0040] The first moving part structure 6 includes a first structural component 601, a first connecting component 602, a first iron core 603, a first winding 604, and a second guide rail 605. The first iron core 603 has the first winding 604 mounted on it. The first structural component 601 has a bottom groove, and the first iron core 603 is disposed within this bottom groove. The first structural component 601 and the first iron core 603 are connected and fixed by the first connecting component 602. Second guide rails 605 are provided on both sides of the first structural component 601.

[0041] The first iron core 603 and the first winding 604 are the mover assembly.

[0042] The second moving part structure 7 includes a second structural member 701, a second connecting member 702, a second iron core 703, a second winding 704, and a third guide rail 705. The second iron core 703 has the second winding 704 mounted on it. The second structural member 701 has a bottom groove, and the second iron core 703 is disposed within this groove. The second structural member 701 and the second iron core 703 are connected and fixed together by the second connecting member 702. Third guide rails 705 are provided on both sides of the second structural member 701.

[0043] The second iron core 703 and the second winding 704 are moving part assemblies.

[0044] Arc-shaped grooves are provided on the first guide rail 2, the second guide rail 605, and the third guide rail 705.

[0045] The first structural component 601 is provided with two steel ball receiving holes. A ball return device is fixed to both ends of the second guide rail 605 on the first structural component 601. The ball return device connects the steel ball receiving holes and the arc-shaped groove of the second guide rail 605. Steel balls are filled in the steel ball receiving holes, the ball return devices, and the space between the second guide rail 605 and the first guide rail 2. When the first moving part 6 moves, steel balls flow out from the ball return device at one end between the second guide rail 605 and the first guide rail 2, and steel balls flow back into the space between the second guide rail 605 and the first guide rail 2 from the ball return device at the other end. Through the cooperation of the second guide rail 605, the first guide rail 2, and the steel balls, the friction is effectively reduced.

[0046] In one embodiment, lubricating oil is provided between the steel ball and the second guide rail 605 and the first guide rail 2, which can reduce the heat and noise caused by friction and extend the service life.

[0047] The second structural component 701 is provided with two steel ball receiving holes. A ball return device is fixed to both ends of the third guide rail 705 on the second structural component 701. The ball return device connects the steel ball receiving holes and the arc-shaped groove of the third guide rail 705. Steel balls are filled in the steel ball receiving holes, the ball return devices, and the space between the third guide rail 705 and the first guide rail 2. When the second moving part 7 moves, steel balls flow out from the ball return device at one end between the third guide rail 705 and the first guide rail 2, and steel balls flow into the space between the third guide rail 705 and the first guide rail 2 from the ball return device at the other end. Through the cooperation of the third guide rail 705, the first guide rail 2, and the steel balls, the friction is effectively reduced.

[0048] In one embodiment, lubricating oil is provided between the steel ball and the third guide rail 705 and the first guide rail 2, which can reduce the heat and noise caused by friction and extend the service life.

[0049] In one embodiment, the base 1 is made of aluminum, which improves the heat dissipation capacity of the motor during operation.

[0050] The linear motor includes a stator assembly 3, a first mover structure 6, a second mover structure 7, a first guide rail 2, etc.

[0051] In one embodiment, the first mover structure 6 and the second mover structure 7 have the same structure.

[0052] A linear encoder 4 is also fixed at the bottom of the inner side of the receiving groove of the base 1. The linear motor, through the precision controller of the servo driver, and in conjunction with the feedback of the linear encoder 4, makes the whole servo system form a closed loop system, which can achieve a reciprocating positioning accuracy of 0.005mm.

[0053] In one embodiment, the linear encoder 4 is a magnetic encoder, which reduces the requirements for use and broadens the scope of application of the product.

[0054] Both the first moving part structure 6 and the second moving part structure 7 are potted with epoxy adhesive with high thermal conductivity, high strength and high temperature resistance, so that the first moving part structure 6 and the second moving part structure 7 achieve an IP67 protection level.

[0055] Both the first structural component 601 and the second structural component 701 are equipped with heat dissipation channels, which greatly improves the thrust density and power density of the linear motor in products of the same volume.

[0056] Both the first structural component 601 and the second structural component 701 have arc-shaped protrusions on their tops. The same sound-dampening cover 11 is placed on the arc-shaped protrusions of the first structural component 601 and the second structural component 701, and the sound-dampening cover 11 is fixedly connected to the base 1. The sound-dampening cover 11 reduces noise.

[0057] In one embodiment, rolling bearings are provided at both ends of the arc-shaped protrusions of the first structural member 601 and the second structural member 701, which can further reduce friction and improve transmission efficiency.

[0058] Both the first structural component 601 and the second structural component 701 have mounting platforms at both ends of the arc-shaped protrusion, and the height of the mounting platforms is greater than the height of the arc-shaped protrusion. A tool mounting seat 8 is fixed to the mounting platform of the first structural component 601, and a tightening tool 9 is fixed to the tool mounting seat 8.

[0059] The second structural component 701 has a nail feeding module 10 fixed on its mounting platform. The nail feeding module 10 includes a nail feeding mounting base 1001 and a nail feeding tube 1002. The nail feeding mounting base 1001 is fixed on the mounting platform of the second structural component 701, and the nail feeding tube 1002 passes through the nail feeding mounting base 1001.

[0060] Photoelectric sensors 12 are installed at both ends of the base 1 to ensure safe use.

[0061] Both the first moving substructure 6 and the second moving substructure 7 are equipped with a brake assembly 5. The brake assembly 5 includes a brake 501 and a brake guide rail 502. The brake guide rail 502 is fixedly connected to the base 1. The brake 501 on one side of the first moving substructure 6 is fixedly connected to the first structural member 601, and the brake 501 on one side of the second moving substructure 7 is fixedly connected to the second structural member 701. When the product is used vertically, the module can be locked in the event of an accidental power failure, ensuring that the customer's product is not damaged.

[0062] The output end of the tightening tool 9 is inserted inside the nail feeding tube 1002.

[0063] A servo driver drives a linear motor, and a linear encoder 4 provides feedback, forming a closed-loop servo system. The mover coil generates an alternating magnetic field with a given current. This alternating magnetic field couples with the permanent magnet magnetic field generated by the stator assembly 3, giving the first mover structure 6 and the second mover structure 7 a driving force F. This force drives the tool mounting base 8, the tightening tool 9, and the nail feeding module 10 in reciprocating linear motion. Software control allows for positioning accuracy of the mover's reciprocating motion to be controlled within 0.005mm.

[0064] In practical use, the screw is placed into the screw feeding tube 1002. The servo driver controls the first moving substructure 6 to move, which in turn moves the screw feeding module 10, thus moving the screw and the screw feeding tube 1002 to the desired position. The servo driver then controls the second moving substructure 7 to move, which in turn moves the tightening tool 9 via the tool mounting base 8, simultaneously activating the tightening tool 9 to tighten the screw. The noise-reducing cover 11 isolates some noise, effectively reducing overall noise levels.

[0065] The above description is an explanation of this application and not a limitation thereof. The scope of this application is defined by the claims. Within the scope of protection of this application, any form of modification may be made.

Claims

1. A permanent magnet synchronous linear motor servo tightening module, characterized in that, include: The base (1) has a receiving groove on its top, and the two inner walls of the receiving groove are fixed with first guide rails (2). The stator assembly (3) is fixed to the bottom of the receiving groove of the base (1); The first moving substructure (6) and the second moving substructure (7) are movably disposed in the receiving groove of the base (1); Tool mounting base (8) is fixed on the second moving part structure (7); Tighten the tool (9) and fix it on the tool mounting base (8); The nail feeding module (10) is fixed on the first moving part structure (6). The nail feeding module (10) includes a nail feeding tube (1002), and the output end of the tightening tool (9) is movably located in the nail feeding tube (1002). The first moving part structure (6) includes a first structural component (601), a moving part assembly is provided inside the first structural component (601), a second guide rail (605) is provided on both sides of the first structural component (601), the second guide rail (605) and the first guide rail (2) are both provided with arc grooves, the first structural component (601) is provided with two steel ball receiving holes respectively, and ball returners are fixed at both ends of the first structural component (601) and the second guide rail (605). The ball returners connect the steel ball receiving holes and the arc grooves of the second guide rail (605). Steel balls are filled between the steel ball receiving holes, the ball returners, and the second guide rail (605) and the first guide rail (2). The first moving part structure (6) and the second moving part structure (7) have the same structure.

2. The permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: The stator assembly (3) includes a mounting plate (301) and permanent magnets (302). Multiple permanent magnets (302) are provided, and multiple permanent magnets (302) are fixed at intervals on the mounting plate (301). The mounting plate (301) is fixed to the bottom of the receiving groove of the base (1).

3. The permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: The moving part assembly includes a first iron core (603) and a first winding (604). The first winding (604) is disposed on the first iron core (603). The first structural member (601) and the first iron core (603) are connected and fixed by a first connector (602).

4. The permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: A linear encoder (4) is also fixed to the bottom of the inner side of the receiving groove of the base (1).

5. A permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: It also includes two brake assemblies (5), which are used to brake the first moving substructure (6) and the second moving substructure (7), respectively.

6. The permanent magnet synchronous linear motor servo tightening module as described in claim 5, characterized in that: The brake assembly (5) includes a brake (501) and a brake guide rail (502). The brake guide rail (502) is fixedly connected to the base (1). The brake (501) on one side of the first moving substructure (6) is fixedly connected to the first structural member (601). The brake (501) on one side of the second moving substructure (7) is fixedly connected to the second structural member (701).

7. A permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: The first structural member (601) has an arc-shaped protrusion on its top. A silent cover plate (11) is placed on the arc-shaped protrusion of the first structural member (601). The silent cover plate (11) is fixedly connected to the base (1). The first structural member (601) has mounting platforms at both ends of the arc-shaped protrusion. The height of the mounting platform is greater than the height of the arc-shaped protrusion. A tool mounting seat (8) is fixed on the mounting platform of the first structural member (601).

8. A permanent magnet synchronous linear motor servo tightening module as described in claim 7, characterized in that: Rolling bearings are provided at both ends of the arc-shaped protrusion of the first structural component (601).

9. A permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: The first structural component (601) is provided with heat dissipation channels inside.

10. A permanent magnet synchronous linear motor servo tightening module as described in claim 1, characterized in that: Photoelectric sensors (12) are provided at both ends of the base (1).

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