Permanent magnet motor magnetic steel assembly tool

Abstract

The application discloses a permanent magnet motor magnetic steel assembling tool, and belongs to the technical field of motor manufacturing, which comprises a fixed chassis, a clamping base for fixing a motor shell is arranged on the fixed chassis, and a magnetic steel sheet conveying structure for positioning and fixing magnetic steel sheets on the inner surface of the motor shell. The application provides a novel magnetic steel assembling tool which can realize automatic operation, is particularly suitable for a magnetic steel sheet sticking process, and can further improve assembling precision and efficiency. Through the highly automatic conveying and sticking structure, the problems of low efficiency and poor consistency existing in traditional manual sticking and existing semi-automatic tools are solved.

Description

Technical Field

[0001] This application belongs to the field of motor manufacturing technology, and specifically relates to a permanent magnet motor magnet assembly fixture, and more particularly to an automated assembly device for automatically and accurately attaching magnet sheets to the inner surface of the motor housing. Background Technology

[0002] Permanent magnet motors are widely used due to their high efficiency and high power density. As a key component of permanent magnet motors, the assembly accuracy and efficiency of the magnets directly affect the motor's performance and production costs. Currently, the assembly of magnets in permanent magnet motors faces two main challenges: First, the magnets themselves are highly magnetic, and during assembly, they are easily attracted to ferromagnetic tools or the motor core, leading to installation difficulties, inaccurate positioning, and even magnet breakage or personal injury accidents. Second, for processes requiring the uniform circumferential bonding of multiple magnet sheets to the inner wall of a cylindrical motor housing, traditional methods rely heavily on manual operation, resulting in low efficiency, poor consistency, and high labor intensity.

[0003] In the prior art, to address the aforementioned problems, those skilled in the art have developed various magnet assembly fixtures. For example, patent document CN223141747U discloses a permanent magnet motor magnet assembly fixture, which achieves precise positioning and polarity error prevention of the magnets through structures such as a magnet positioning bushing, a support base, an adjusting fastening block, and a guide fixture with a polarity-determining auxiliary magnet. This solution effectively solves the positioning and error prevention problems in manual assembly.

[0004] However, the applicant's technical personnel discovered the following problems with the existing technical solution: First, the tooling is essentially a semi-automatic auxiliary tool primarily for guidance and positioning. The final pressing and fixing of the magnets still relies on manual labor or simple tools, failing to achieve full automation and limiting further improvements in assembly efficiency. Second, its structure is relatively complex, including multiple positioning bushings, support seats, adapters, and a dedicated polarity-determining magnet assembly. The clamping and adjustment steps are numerous, and its cycle time advantage is not significant for modern manufacturing lines pursuing high efficiency and mass production. Finally, this solution mainly targets the process of embedding magnets into the rotor core slots. Its applicability is limited for another common process requiring the bonding of magnet sheets to the smooth inner wall of the housing. Utility Model Content

[0005] The purpose of this invention is to address existing problems by providing a novel magnetic steel assembly fixture that enables automated operation, is particularly suitable for magnetic steel sheet bonding processes, and further improves assembly accuracy and efficiency. Through a highly automated conveying and bonding structure, it solves the problems of low efficiency and poor consistency in traditional manual bonding and existing semi-automatic fixtures.

[0006] To achieve the above technical objectives, the following technical solution is provided: a permanent magnet motor magnet assembly fixture, including a fixed base frame, a clamping base for fixing the motor housing, and a magnet sheet conveying structure for positioning and fixing the magnet sheet on the inner surface of the motor housing. The magnetic steel sheet conveying structure includes a lifting cylinder assembly, which is vertically arranged and includes a top lifting cylinder mounted on a fixed base frame; and a bottom fixed rotating platform, which is fixed on the outer ring of a bearing component. The inner ring of the bearing component is fixedly connected to a fixed rod, and the fixed rod is connected to a telescopic rod inside the lifting cylinder. The magnetic steel sheet attachment assembly includes a cylinder component. The tail of the cylinder component is fixed to a rotating platform, and the head is fixed to a first base plate. The cylinder rod of the cylinder component passes through the first base plate, and an extension shaft is threaded onto the cylinder rod. Several first fixing rods are evenly arranged on the first base plate, and positioning bases are fixedly connected to the several first fixing rods. Positioning plates for bonding magnetic steel sheets are provided on the positioning bases, and the positioning bases restrict the extension shaft to axial movement. The positioning plates are movably connected to the extension shaft. When the cylinder component drives the extension shaft to move axially within the positioning base, the extension shaft drives the positioning plates to move radially within the positioning base, so that the magnetic steel sheets bonded to the positioning plates are transported to the inner surface of the motor housing.

[0007] In one feasible embodiment, the movable connection between the positioning plate and the extension shaft includes at least two layers of traction lugs disposed on the extension shaft, each layer having a plurality of evenly arranged traction lugs; and a connecting lug layer disposed on the positioning plate that matches the traction lug layers, each connecting lug layer having a plurality of evenly arranged connecting lugs that engage with the traction lugs; and a transition lug is provided between the traction lugs and the connecting lugs, which are respectively rotatably connected to both.

[0008] In one feasible approach, the axial movement of the extension shaft within the positioning base includes a limiting channel sleeved on the extension shaft and disposed on the positioning base, wherein a limiting groove is provided on the side of the limiting channel, which is aligned with the direction of movement of the extension shaft and is capable of accommodating at least two pull ears.

[0009] In one feasible embodiment, the engagement between the positioning piece and the positioning base includes a limiting rod located at the end of the positioning piece, and a radial groove on the positioning base for limiting the limiting rod; a reinforcing base is provided between the positioning piece and the limiting rod.

[0010] In one feasible embodiment, the positioning sheet includes a positioning substrate and a rubber adhesive layer covering the positioning substrate.

[0011] In one feasible embodiment, the clamping base includes a motor assembly fixed to the clamping base, a bushing fixed to the output end of the motor assembly, a rotating disk fixed to the bushing, and a guide disk fixed to the clamping base stacked on the rotating disk. The rotating disk is provided with at least three first arc-shaped guide rails arranged clockwise, and the guide disk is provided with at least three second arc-shaped guide rails arranged counterclockwise. A clamping shaft passing through the two guide rails is provided at the intersection of the first arc-shaped guide rails and the second arc-shaped guide rails. A clamping piece for clamping the motor housing is fixed at the upper end of the clamping shaft. When the motor assembly is working, the rotating disk rotates, and the clamping shaft moves radially within the first and second arc-shaped guide rails.

[0012] Compared with the prior art, the present invention has the following advantages: This invention utilizes a lifting cylinder assembly to achieve the lifting and rotation of the attachment mechanism, and a cylinder within the magnetic sheet attachment assembly to achieve the radial expansion and attachment of the magnetic sheet. The workpiece is automatically clamped by a clamping base, thus automating the entire process from positioning to attachment. This solution significantly reduces manual intervention and is particularly suitable for large-scale continuous production, resulting in a substantial leap in assembly efficiency.

[0013] This technical solution employs a mechanical linkage transmission mechanism and a precise guide rail limiting structure to accurately convert the linear motion of the cylinder into the synchronous radial motion of multiple positioning plates. This ensures that all magnet plates arrive at the predetermined mounting position simultaneously and at equal intervals, guaranteeing the uniformity and angular accuracy of the magnets' circumferential distribution within the housing, resulting in consistent product quality.

[0014] This technical solution uses a rubber adhesive layer to temporarily fix the magnetic steel sheet, which is a non-magnetic fixing method. This fundamentally avoids the problem of uncontrolled attraction and impact between the strong magnetic steel and the tooling during assembly, greatly improving operational safety and protecting the magnet and workpiece from damage. In summary, the radial expansion attachment mechanism of the tooling perfectly matches the requirements of this process.

[0015] Furthermore, in this technical solution, the synchronous radial clamping mechanism used in the clamping base can ensure that the motor housing is firmly and concentrically fixed during the processing, providing a solid foundation for high-precision attachment. Attached Figure Description

[0016] 1. Fixed base frame; 2. Clamping base; 3. Magnetic steel sheet conveying structure; 4. Motor housing; 5. Magnetic steel sheet. 21 Motor assembly, 22 Rotary disk, 23 Guide disk, 24 First arc-shaped guide rail, 25 Second arc-shaped guide rail, 26 Clamping shaft, 27 Clamping plate. 31 Lifting cylinder assembly, 310 Rotary table, 311 Fixed rod. 32. Magnet plate attachment assembly; 320. Cylinder component; 321. First base plate; 322. Extension shaft; 323. First fixing rod; 324. Positioning base; 325. Positioning plate. 3220 Pull lug, 3221 Connecting lug, 3222 Adapter lug, 3223 Limiting channel, 3224 Limiting groove, 3225 Limiting rod, 3226 Radial groove. Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 yes Figure 1 A frontal view diagram; Figure 3 yes Figure 2 A sectional view at point AA; Figure 4 This is a structural schematic diagram of the magnet sheet attachment assembly; Figure 5 yes Figure 4 Front view of the central magnet sheet attachment assembly; Figure 6 yes Figure 5 Sectional view at point BB; Figure 7 yes Figure 5 Cross-sectional view of the section when the middle BB is closed; Figure 8 This is a schematic diagram of the clamping base; Detailed Implementation

[0017] like Figure 1 , Figure 2 and Figure 3 The embodiment shown includes a permanent magnet motor magnet assembly fixture, comprising a fixed base frame 1, a clamping base 2 for fixing the motor housing 4, and a magnet sheet conveying structure 3 for positioning and fixing the magnet sheet 5 on the inner surface of the motor housing 4.

[0018] In this embodiment, the magnetic steel sheet conveying structure 3 includes a lifting cylinder assembly 31, which is vertically arranged and includes a top lifting cylinder mounted on a fixed base frame 1; and a bottom fixed rotating table 310, which is fixed on the outer ring of a bearing component. The inner ring of the bearing component is fixedly connected to a fixed rod 311, and the fixed rod 311 is connected to a telescopic rod inside the lifting cylinder.

[0019] like Figure 4 , Figure 5 , Figure 6 and Figure 7The magnetic steel sheet attaching assembly 32 shown includes a cylinder 320. The tail of the cylinder 320 is fixed on the rotary table 310, and the head is fixed to a first base plate 321. The cylinder rod of the cylinder 320 passes through the first base plate 321, and an extension shaft 322 is threaded onto the cylinder rod. A plurality of first fixing rods 323 are evenly arranged on the first base plate 321, and a positioning base 324 is fixedly connected to the plurality of first fixing rods 323. A positioning piece 325 for bonding the magnetic steel sheet is provided on the positioning base 324, and the positioning base 324 restricts the extension shaft 322 to axial movement. The positioning piece 325 is movably connected to the extension shaft 322. When the cylinder 320 drives the extension shaft 322 to move axially within the positioning base 324, the extension shaft 322 drives the positioning piece 325 to move radially within the positioning base 324, so that the magnetic steel sheet bonded to the positioning piece 325 is transported to the inner surface of the motor housing 4.

[0020] In this embodiment, the movable connection between the positioning piece 325 and the extension shaft 322 includes two layers of traction lugs disposed on the extension shaft 322, each layer having eight evenly arranged traction lugs 3220; and a connecting ear layer disposed on the positioning piece 325 that matches the traction lugs, each layer having eight evenly arranged connecting ears 3221 that cooperate with the traction lugs 3220; and a transition ear 3222 is disposed between the traction lugs 3220 and the connecting ears 3221, which are rotatably connected to both.

[0021] In this embodiment, the axial movement of the extension shaft 322 within the positioning base 324 includes a limiting channel 3223 sleeved on the extension shaft 322 and provided on the positioning base 324. The limiting channel 3223 has a limiting groove 3224 on its side that is consistent with the movement direction of the extension shaft 322 and can accommodate two pull ears 3220.

[0022] In this embodiment, the cooperation between the positioning piece 325 and the positioning base 324 includes a limiting rod 3225 disposed at the end of the positioning piece 325, and a radial groove 3226 for limiting the limiting rod 3225 disposed on the positioning base 324; a reinforcing base is provided between the positioning piece 325 and the limiting rod 3225.

[0023] In this embodiment, the positioning piece 325 includes a positioning substrate and a rubber adhesive layer covering the positioning substrate.

[0024] In this embodiment, as Figure 8 The clamping base 2 shown includes a motor assembly 21 fixed on the clamping base 2. A bushing seat is fixed on the output end of the motor assembly 21. A rotating disk 22 is fixed on the bushing seat. A guide disk 23 fixed on the clamping base 2 is stacked on the rotating disk 22. The rotating disk 22 is provided with four first arc-shaped guide rails 24 arranged clockwise, and the guide disk 23 is provided with four second arc-shaped guide rails 25 arranged counterclockwise. A clamping shaft 26 is provided at the intersection of the first arc-shaped guide rails 24 and the second arc-shaped guide rails 25, which passes through the two guide rails. The upper end of the clamping shaft 26 is fixed with a clamping piece 27 for clamping the motor housing 4. When the motor assembly 21 is working, the rotating disk 22 rotates, and the clamping shaft 26 moves radially within the first arc-shaped guide rails 24 and the second arc-shaped guide rails 25.

[0025] During operation, the motor housing 4 is first placed on the clamping base 2. The motor assembly 21 is started, driving the rotating disk 22 to rotate. Since the clamping shafts 26 are simultaneously located within the first arc-shaped guide rail 24 of the rotating disk 22 and the second arc-shaped guide rail 25 of the fixed guide disk 23, the rotation of the rotating disk forces all the clamping shafts 26 to move radially towards the center synchronously, thereby firmly clamping the motor housing 4 through the clamping plates 27 and automatically centering it.

[0026] Then, the magnetic sheet conveying structure 3 begins to operate. The operator or robotic arm attaches eight magnetic sheets 5 to the rubber adhesive layer of the positioning sheet 325. The lifting cylinder assembly 31 operates, driving the entire magnetic sheet attachment assembly 32 to descend and enter the motor housing 4. Subsequently, the cylinder 320 actuates, pushing the extension shaft 322 forward axially. The lugs 3220 on the extension shaft 322 push the connecting lugs 3221 on the positioning sheet 325 via the connecting lugs 3222. Because the limiting rod 3225 of the positioning sheet 325 is confined in the radial groove 3226 of the positioning base 324, the positioning sheet 325 cannot move axially; it can only expand radially outward along the radial groove 3226 under the action of the linkage mechanism, thereby precisely and smoothly pressing the magnetic sheets 5 adhered thereto onto the inner surface of the motor housing 4.

[0027] After attachment is completed, cylinder 320 moves in the reverse direction, pulling extension shaft 322 back. This, via a linkage mechanism, causes all positioning pieces 325 to radially retract, separating the rubber adhesive layer from the magnet piece 5. Finally, lifting cylinder assembly 31 raises magnet piece attachment assembly 32, completing one assembly cycle. If magnets at different angles need to be attached, the entire attachment assembly can be rotated to the next station using rotary table 310.

[0028] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0031] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A permanent magnet motor magnet assembly fixture, comprising a fixed base frame (1), characterized in that, The fixed base frame (1) is provided with a clamping base (2) for fixing the motor housing (4) and a magnetic steel sheet conveying structure (3) for positioning and fixing the magnetic steel sheet (5) on the inner surface of the motor housing (4). The magnetic steel sheet conveying structure (3) includes a lifting cylinder assembly (31), which is vertically arranged and includes a top lifting cylinder mounted on the fixed base frame (1); and a bottom fixed rotating table (310), which is fixed on the outer ring of the bearing component. The inner ring of the bearing component is fixedly connected to a fixed rod (311), and the fixed rod (311) is connected to the telescopic rod inside the lifting cylinder. A magnetic steel sheet attaching assembly (32) includes a cylinder component (320). The tail of the cylinder component (320) is fixed on the rotary table (310), and the head is fixed with a first base plate (321). The cylinder rod of the cylinder component (320) passes through the first base plate (321), and an extension shaft (322) is threaded onto the cylinder rod. A plurality of first fixing rods (323) are evenly arranged on the first base plate (321), and a positioning base (324) is fixedly connected to the plurality of first fixing rods (323). 4) A positioning piece (325) with an adhesive magnetic steel sheet is provided on it, and the positioning base (324) restricts the extension shaft (322) to move axially. The positioning piece (325) is movably connected to the extension shaft (322). When the extension shaft (322) is driven to move axially in the positioning base (324) by the cylinder (320), the extension shaft (322) drives the positioning piece (325) to move radially in the positioning base (324), so that the magnetic steel sheet adhesively attached to the positioning piece (325) is transported to the inner surface of the motor housing (4).

2. The permanent magnet motor magnet assembly fixture according to claim 1, characterized in that, The movable connection between the positioning piece (325) and the extension shaft (322) includes at least two layers of traction lugs disposed on the extension shaft (322), each layer of the traction lugs having a plurality of evenly arranged traction lugs (3220); and a connecting lug layer disposed on the positioning piece (325) matching the traction lug layers, each layer of the connecting lug layer having a plurality of evenly arranged connecting lugs (3221) cooperating with the traction lugs (3220); and a transition lug (3222) is disposed between the traction lugs (3220) and the connecting lugs (3221) respectively rotatably connected to both.

3. The permanent magnet motor magnet assembly fixture according to claim 2, characterized in that, The axial movement of the extension shaft (322) within the positioning base (324) includes a limiting channel (3223) sleeved on the extension shaft (322) and provided on the positioning base (324). The limiting channel (3223) has a limiting groove (3224) on its side that is consistent with the movement direction of the extension shaft (322) and can accommodate at least two of the pull ears (3220).

4. The permanent magnet motor magnet assembly fixture according to claim 1, characterized in that, The cooperation between the positioning piece (325) and the positioning base (324) includes a limiting rod (3225) provided at the end of the positioning piece (325), and a radial groove (3226) provided on the positioning base (324) to limit the limiting rod (3225); a reinforcing base is provided between the positioning piece (325) and the limiting rod (3225).

5. The permanent magnet motor magnet assembly fixture according to claim 1, 2, 3, or 4, characterized in that, The positioning piece (325) includes a positioning substrate and a rubber adhesive layer covering the positioning substrate.

6. The permanent magnet motor magnet assembly fixture according to claim 1, characterized in that, The clamping base (2) includes a motor assembly (21) fixed on the clamping base (2), a bushing seat fixed on the output end of the motor assembly (21), a rotating disk (22) fixed on the bushing seat, and a guide disk (23) fixed on the clamping base (2) stacked on the rotating disk (22). The rotating disk (22) is provided with at least three first arc-shaped guide rails (24) arranged in a clockwise direction, and the guide disk (23) is provided with at least three second arc-shaped guide rails (25) arranged in a counterclockwise direction. A clamping shaft (26) passing through the two guide rails is provided at the intersection of the first arc-shaped guide rail (24) and the second arc-shaped guide rail (25). The upper end of the clamping shaft (26) is fixed with a clamping piece (27) for clamping the motor housing (4). When the motor assembly (21) is working, the rotating disk (22) rotates, and the clamping shaft (26) moves radially within the first arc-shaped guide rail (24) and the second arc-shaped guide rail (25).

Images