Strong magnetic permanent magnet assembly assembling tool

Abstract

The utility model relates to the technical field of permanent magnets, in particular to a permanent magnet assembling method. According to the technical scheme, the assembling tool for the strong magnetic permanent magnet assembly is characterized by comprising an assembling support and a jacking screw rod, the jacking screw rod is arranged above the assembling support, the tail end of the jacking screw rod is connected with an upper press-fitting guide ring, the upper press-fitting guide ring is installed on the assembling support, and a lower press-fitting guide column is arranged under the upper press-fitting guide ring. The strong magnetic permanent magnet assembly assembling tool solves the problems of poor assembling precision, complex structure, poor safety, difficulty in use, low assembling efficiency and poor stability, and achieves the purposes of high assembling precision, high adaptability, high safety, high assembling efficiency and high stability.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnets, in particular to a permanent magnet assembling method. Background Art

[0002] In recent years, with the increasing cost-effectiveness of sintered NdFeB, SmCo, and ferrite permanent magnets, the development and application of various large and medium-sized permanent magnet devices has entered a new phase. During the assembly process, the repulsive forces between permanent magnet units are significant. In particular, when a permanent magnet unit is first inserted into the rotor yoke during installation, the rotor yoke exerts a strong impact attraction on the permanent magnet unit. This can easily damage the permanent magnet and severely reduce the accuracy of the permanent magnet unit's installation within the rotor yoke. Modern permanent magnet materials such as sintered NdFeB, SmCo, and ferrite, manufactured using powder metallurgy, are particularly brittle. This strong impact attraction can easily cause fragmented magnets to fly outward, potentially causing personal injury. For example, Chinese patent publication number CN102118084B discloses a permanent magnet assembly device and method, providing the following technical solution: the assembly device includes a permanent magnet push-in fixture, which includes a left fixed bracket, a right fixed bracket, a rotating shaft, and a screw assembly; the screw assembly includes a screw, a slide rod, a sliding push block, and a rotating device; the permanent magnet assembly device also includes a permanent magnet guide and limit frame. The utility model also provides a method for assembling permanent magnets using the permanent magnet assembly device provided by the utility model. The permanent magnet assembly device and assembly method provided by the utility model can not only ensure the accurate positioning of the permanent magnet unit, but also greatly reduce the strong impact attraction generated by the permanent magnet unit before contacting the rotor yoke, allowing the permanent magnet unit to smoothly transition to the rotor yoke, reducing the occurrence of bumping, ensuring production safety, and significantly improving product qualification rate. However, the above device has a complex structure, is difficult to use, and has difficulty in ensuring radial and axial positioning accuracy. Utility Model Content

[0003] The utility model solves the problems of poor assembly precision, complex structure, poor safety, difficult use, low assembly efficiency and poor stability. The utility model proposes an assembly tool for strong magnetic permanent magnet components, which achieves the goals of high assembly precision, strong adaptability, high safety, high assembly efficiency and high stability.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a strong magnetic permanent magnet assembly tool, characterized in that it includes: an assembly bracket and a tightening screw, the tightening screw is arranged above the assembly bracket, and the end is connected to the upper press-fit guide ring, the upper press-fit guide ring is installed on the assembly bracket, and a lower press-fit guide column is provided directly below it.

[0005] The advantage of this design is that, through the coordinated use of the tightening screw and the guide ring, the upward pressure can be precisely controlled while ensuring precise alignment between the permanent magnet assemblies, thereby improving assembly accuracy and safety.

[0006] Preferably, the assembly bracket includes a base plate, an upper press-fit guide ring mounting plate and a top plate, the lower press-fit guide column is arranged on the base plate, the top end of the upper press-fit guide ring is installed on the upper press-fit guide ring mounting plate and is connected to the tightening screw, and the lower press-fit guide column is provided at the bottom.

[0007] The advantage of this design is that it enhances the stability and reliability of the entire assembly tooling, ensuring safety and assembly quality during the assembly process.

[0008] Preferably, the upper press-fitting guide ring and the lower press-fitting guide column are aligned in the vertical direction, and their center points coincide to form concentric circles, and the diameter of the upper press-fitting guide ring is greater than the diameter of the lower press-fitting guide column.

[0009] The advantage of this design is that it ensures the correct positioning and center alignment of the permanent magnet assembly during the assembly process, reduces deviation and improves assembly accuracy.

[0010] Preferably, the upper press-fit guide ring is installed on the upper press-fit guide ring mounting plate using a plurality of upper press-fit guide ring positioning bolts, and the lower press-fit guide column is installed on the base plate using a plurality of lower press-fit guide column positioning bolts.

[0011] The advantage of this design is that it increases flexibility and adjustability during the assembly process, allowing replacement and adjustment according to actual needs, ensuring higher assembly accuracy and flexibility.

[0012] Preferably, a through hole is provided in the center of the top plate for passing the tightening screw rod, and a rotating rod is provided on the top of the tightening screw rod.

[0013] The advantage of this design is that it is easy for the operator to adjust the pressure of the tightening screw, making the assembly process more precise and convenient.

[0014] Preferably, the upper press-fit guide ring and the lower press-fit guide column are both detachable structures, and the axial length of the upper press-fit guide ring and the lower press-fit guide column ranges from 50 mm to 500 mm.

[0015] The advantage of this design is that it provides a high degree of adaptability, can control the upper and lower press-fitting strokes, allows the tooling to adapt to permanent magnet assemblies of different sizes and shapes, and enhances the versatility of the tooling.

[0016] Preferably, the assembly tooling for the strong magnetic permanent magnet components is made of non-magnetic materials.

[0017] The advantage of this design is that it avoids the interference of the magnetic field on the assembly accuracy, while reducing unnecessary magnetic attraction or repulsion between permanent magnet materials, thereby improving the safety and reliability of assembly.

[0018] Preferably, the lower press-fit guide column is provided with a plurality of circumferentially distributed axial press-fit guide bolts, and the axial length of the axial press-fit guide bolts ranges from 600 to 1000 mm.

[0019] The advantage of such a design is that it can better guide and support the position of the permanent magnet assembly during the assembly process, ensuring its correct alignment in the axial direction, thereby improving the accuracy and efficiency of the assembly.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. Through the coordinated operation of the tightening screw and guide ring, this device achieves precise control of the upper pressure of the strong permanent magnet assembly, while ensuring precise alignment and concentricity between components, significantly reducing assembly deviation and greatly improving assembly accuracy. Combined with the axial press-fit guide bolt, these designs optimize the assembly process and enhance the overall efficiency of permanent magnet assembly.

[0022] 2. This utility model utilizes non-magnetic materials, effectively isolating magnetic field interference, ensuring safe assembly and reducing the risk of accidental damage. The removable structure of the tooling provides high adaptability, and the adjustable length range of the upper press-fit guide ring and lower press-fit guide column meets the requirements of different product specifications, greatly enhancing the tooling's versatility and practicality.

[0023] 3. The meticulously designed support structure of this tooling fixture, comprising a base plate, mounting plate, and top plate, ensures stability and reliability during assembly. The through-holes and rotating rods in the top plate facilitate adjustment of the jacking screw, allowing the operator to easily adjust the pressure, further enhancing installation convenience and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of an embodiment of the present invention when not in operation.

[0025] Figure 2 This is a front view of an embodiment of the utility model when not in operation.

[0026] Figure 3 The figure is a structural diagram of a strong permanent magnet assembly according to an embodiment of the present utility model.

[0027] Figure 4 This is a front view of an embodiment of the utility model in operation.

[0028] Figure 5 This is a schematic diagram of the structure of an embodiment of the present invention during operation.

[0029] Illustrations: 1. Permanent magnet fixing ring; 2. Split permanent magnet; 3. Tightening screw; 4. Press-fit guide ring positioning bolt; 5. Press-fit guide ring; 6. Assembly bracket; 7. Press-fit guide column; 8. Press-fit guide column positioning bolt; 9. Axial press-fit guide bolt; 10. Strong magnetic permanent magnet assembly; 11. Connection hole. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present disclosure more clearly apparent, embodiments of the present disclosure are described in further detail below with reference to the accompanying drawings. The proportions of the components are not drawn to scale, and the proportions and dimensions shown in the accompanying drawings are not intended to limit the substantial technical solutions of the present disclosure. These embodiments do not describe all details in detail, nor do they limit the present disclosure to the specific embodiments described.

[0031] See also Figure 1-5 As shown, a strong magnetic permanent magnet assembly tool is characterized in that it includes: an assembly bracket and a tightening screw, the tightening screw is arranged above the assembly bracket, and the end is connected to an upper press-fit guide ring, the upper press-fit guide ring is installed on the assembly bracket, and a lower press-fit guide column is provided directly below.

[0032] The permanent magnet assembly is made of segmented permanent magnets (types of permanent magnets: NdFeB, SmCo, AlNiCo or ferrite) at a certain angle (radial or oblique magnetization direction) spliced ​​into a 360° ring using glue (types of glue: epoxy glue, high-temperature glue, etc.). The outer circle is fixed with a fixing ring (made of magnetic conductive material or non-magnetic conductive material, such as 1010 and DT4, and non-magnetic conductive material such as titanium alloy and 304 stainless steel). The above assembly steps form a strong magnetic permanent magnet assembly (single-layer) structure. The strong magnetic permanent magnet is composed of several of the above single-layer structures. In specific applications, the spatial magnetic field in the inner circle is mainly used.

[0033] The difficulty in assembling strong permanent magnet components lies in:

[0034] (1) This type of strong permanent magnet assembly cannot be assembled as a whole and then magnetized, so it is not possible to use a non-magnetic assembly method;

[0035] (2) The magnetic assembly of permanent magnets is difficult, and there is a strong repulsive force between single-layer strong magnetic permanent magnet components;

[0036] (3) The radial and axial positioning accuracy is high, and tooling assistance is required to ensure assembly accuracy;

[0037] (4) Without tooling to assist assembly, the assembly efficiency is low and permanent magnets are prone to damage;

[0038] (5) The tooling must be made of all non-magnetic materials, otherwise there is a certain risk of permanent magnets being damaged by collision. The utility model provides an innovative solution to the difficulty of assembling strong magnetic permanent magnet assemblies. It is made of non-magnetic materials to ensure safety and stability in a strong magnetic environment. The components in the tooling, such as the tightening screw, the upper press guide ring and the lower press guide column, are all designed to be adjustable and replaceable to accommodate permanent magnet assemblies of different sizes and ensure high-precision positioning. By precisely controlling the movement of the upper press guide ring, the repulsive force between the permanent magnet assemblies can be effectively overcome to achieve precise assembly. In addition, the structural design of the tooling makes the assembly process more efficient, reduces the risk of permanent magnet damage, and improves overall production efficiency and product quality.

[0039] like Figure 1 In one embodiment shown, Figure 1 This is a structural schematic diagram of an embodiment of the present invention when not in operation. The present invention relates to an assembly tool for a strong magnetic permanent magnet assembly, which includes an assembly bracket 6 and a tightening screw 3. The tightening screw 3 is located above the assembly bracket 6 and is connected to an upper press-fit guide ring 5 at the end. The guide ring 5 is mounted on the assembly bracket 6, and a lower press-fit guide column 7 is provided at the directly corresponding lower position. The assembly bracket 6 is composed of a base plate, an upper press-fit guide ring mounting plate and a top plate, wherein the lower press-fit guide column 7 is fixed on the base plate, and the upper press-fit guide ring 5 is connected to the upper press-fit guide ring mounting plate via the tightening screw 3. This design ensures that the upper press-fit guide ring 5 and the lower press-fit guide column 7 are aligned in the vertical direction, and the center points are on the same vertical axis, forming a concentric circle structure, wherein the diameter of the upper press-fit guide ring 5 is larger than the diameter of the lower press-fit guide column 7. In addition, the upper press-fit guide ring 5 and the lower press-fit guide column 7 are both detachable structures, and their axial lengths can be adjusted between 50mm and 500mm, which increases the flexibility of the tool. The upper press-fit guide ring 5 is secured to the mounting plate via several set screws 4, while the lower press-fit guide post 7 is also secured to the base plate via several set screws 8. A through-hole is designed in the center of the top plate for the tightening screw 3 to pass through, and a rotating rod is located at the top of the screw to adjust the pressure. All of these components are made of non-magnetic materials to avoid interference with the magnetic field.

[0040] The benefits of this design include improved assembly precision. Thanks to the concentric structure and precise guide mechanism, components can be precisely aligned, ensuring accuracy and repeatability during the assembly process. Safety is also enhanced, as the use of non-magnetic materials reduces the risk of magnetic collision and breakage. Finally, the tooling's adjustability and disassembly greatly enhances its applicability, enabling it to accommodate permanent magnet assemblies of varying sizes while facilitating maintenance and upgrades.

[0041] like Figure 2 In one embodiment shown, Figure 2 This is a front view of an embodiment of the present invention when it is not working. The device of the present invention mainly consists of the following parts: a tightening screw (material: made of non-magnetic materials such as brass or stainless steel), a positioning bolt for an upper press-fit guide ring, a replaceable upper press-fit guide ring (made of non-magnetic materials such as duralumin or stainless steel, the axial length of the guide ring ranges from 50mm to 500mm, and the upper press-fit stroke can be controlled), an assembly bracket (made of non-magnetic materials such as duralumin or stainless steel), a replaceable lower press-fit guide column (made of non-magnetic materials such as duralumin or stainless steel, the axial length of the guide column ranges from 50mm to 500mm, and the lower press-fit stroke can be controlled), and a positioning bolt for a lower press-fit guide column. The material used in the above-mentioned tooling is made of non-magnetic material.

[0042] The design of this utility model cleverly utilizes non-magnetic materials, such as brass, stainless steel, and duralumin, whose performance in strong magnetic fields is particularly important. First, non-magnetic materials ensure that during the assembly of the permanent magnet assembly, the device itself will not be attracted by the magnetic field or generate unnecessary magnetic interference, which is crucial for maintaining assembly precision and stability. The magnetic field's influence on the assembly process is effectively isolated, allowing the assembly to be accurately placed and fixed without external interference. Second, the selected non-magnetic materials, such as stainless steel and duralumin, have excellent mechanical properties and corrosion resistance, improving the durability and long-term stability of the tooling, which is particularly important for precision equipment that is exposed to complex environments for a long time. Even under high magnetic field strengths and the accompanying temperature fluctuations, these materials maintain their structural stability and resist deformation, ensuring consistent assembly precision. Furthermore, because both the upper press-fit guide ring and the lower press-fit guide post are replaceable and have an adjustable axial length range, the device can not only accommodate permanent magnet assemblies of different sizes and specifications, but also be easily replaced and adjusted to meet different operational requirements. This design significantly enhances the versatility and flexibility of the device, reduces the need for additional tools and adjustment time, and further improves the economic benefits and operational efficiency of the tooling. In summary, this combination of material selection and structural design not only provides high-precision assembly capabilities, but also ensures high adaptability and reliability of the device, reduces operational difficulty, and improves efficiency and cost-effectiveness, making it an ideal choice for precision assembly work in strong magnetic environments.

[0043] like Figure 3 In one embodiment shown, Figure 3 This is a schematic diagram of the structure of a high-magnetic permanent magnet assembly in one embodiment of the present invention. The high-magnetic permanent magnet assembly (single layer) is a hollow disk-shaped structure composed of multiple lobed permanent magnets. The outer layer has a permanent magnet retaining ring with multiple connection holes. The magnetization direction of the permanent magnets is from the outside to the inside, pointing toward the center of the circle, along each lobed permanent magnet.

[0044] like Figure 4 and Figure 5 In one embodiment shown, Figure 4 This is a front view of an embodiment of the utility model in operation. Figure 5This is a structural schematic diagram of an embodiment of the present invention in operation. The present invention device designs an assembly tool for a strong magnetic permanent magnet assembly, which includes an assembly bracket 6 and a tightening screw 3. The tightening screw 3 is located above the assembly bracket 6, and its end is connected to an upper press-fit guide ring 5, which is mounted on the assembly bracket 6, and a lower press-fit guide column 7 is provided directly below it. The assembly bracket 6 is composed of a base plate, a mounting plate for the upper press-fit guide ring 5, and a top plate; the lower press-fit guide column 7 is installed on the base plate, and the top end of the upper press-fit guide ring 5 is mounted on the upper press-fit guide ring mounting plate and connected to the tightening screw 3, and a lower press-fit guide column 7 is provided at the bottom. The upper press-fit guide ring 5 and the lower press-fit guide column 7 are aligned in the vertical direction to form concentric circles, and the diameter of the upper press-fit guide ring 5 is larger than the diameter of the lower press-fit guide column 7. Both components are detachable structures with an axial length range of 50mm to 500mm. The lower press-fit guide post 7 is equipped with several axial press-fit guide bolts 9 distributed around it, with an axial length ranging from 600 to 1000 mm. The upper press-fit guide ring 5 is mounted to the upper press-fit guide ring mounting plate using positioning bolts 4, while the lower press-fit guide post 7 is mounted to the base plate using positioning bolts 8. A through-hole in the center of the top plate allows the tensioning screw 3 to pass through, and a rotating rod is installed at the top of the tensioning screw 3. The entire tooling is made of non-magnetic material.

[0045] During assembly, the connection holes on the permanent magnet retaining ring are first aligned with the axial press-fit guide bolts 9 for installation. The holes in the single-layer ferromagnetic permanent magnet assembly are then aligned with the axial press-fit guide bolts 9 and inserted, ensuring axial and radial positioning accuracy. Due to the significant repulsive force between the upper and lower single-layer ferromagnetic permanent magnet assemblies, the upper assembly will be suspended after offsetting the effect of gravity. The operator then rotates the tightening screw 3 to move the replaceable upper press-fit guide ring 5 downward until it contacts the upper single-layer ferromagnetic permanent magnet assembly, creating an initial downward pressure. The upper press-fit guide ring 5 then continues to apply downward force under the action of the tightening screw 3 until the distance between the two sets of single-layer ferromagnetic permanent magnet assemblies is shortened and ultimately abuts. Finally, the two sets of assemblies are tightened with bolts, and the above steps are repeated until all single-layer ferromagnetic permanent magnet assemblies are assembled. Because the number of axial press-fit guide bolts is smaller than the number of connection holes in the ferromagnetic permanent magnet assemblies, bolts can be used to tighten the two sets of single-layer ferromagnetic permanent magnet assemblies through the remaining connection holes.

[0046] The benefit of this design lies in its precise alignment and concentric structure, ensuring high precision during assembly. The use of non-magnetic materials prevents magnetic interference, while adjustable upper and lower pressure components enable the tooling to accommodate permanent magnet assemblies of varying sizes. The interchangeable design enhances the tooling's versatility and flexibility, significantly improving production efficiency and assembly quality.

[0047] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in its shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the scope of protection of the present invention.

Claims

1. A strong permanent magnet assembly tool, characterized in that: include: An assembly bracket (6) and a tightening screw rod (3), wherein the tightening screw rod (3) is arranged above the assembly bracket (6) and the end thereof is connected to an upper press-fit guide ring (5), and the upper press-fit guide ring (5) is installed on the assembly bracket (6), and a lower press-fit guide column (7) is arranged directly below the assembly bracket.

2. The strong magnetic permanent magnet assembly assembly tool according to claim 1, characterized in that: The assembly bracket (6) comprises a bottom plate, an upper press-fit guide ring (5) mounting plate and a top plate, the lower press-fit guide column (7) being arranged on the bottom plate, the top end of the upper press-fit guide ring (5) being mounted on the upper press-fit guide ring mounting plate and being connected to the tightening screw rod (3), and the lower press-fit guide column (7) being arranged at the bottom.

3. A strong permanent magnet assembly assembly tool according to claim 1 or 2, characterized in that: The upper press-fitting guide ring (5) and the lower press-fitting guide column (7) are aligned in the vertical direction, and their center points coincide to form concentric circles. The diameter of the upper press-fitting guide ring (5) is greater than the diameter of the lower press-fitting guide column (7).

4. The strong permanent magnet assembly assembly tool according to claim 3 is characterized in that: The upper press-fit guide ring (5) and the lower press-fit guide column (7) are both detachable structures, and the axial length range of the upper press-fit guide ring (5) and the lower press-fit guide column (7) is 50 mm to 500 mm.

5. The strong permanent magnet assembly assembly tool according to claim 4, characterized in that: The lower press-fit guide column (7) is provided with a plurality of circumferentially distributed axial press-fit guide bolts (9), and the axial length of the axial press-fit guide bolts (9) ranges from 600 to 1000 mm.

6. The strong permanent magnet assembly assembly tool according to claim 2, characterized in that: The upper press-fit guide ring (5) is installed on the upper press-fit guide ring installation plate using a plurality of upper press-fit guide ring positioning bolts (4), and the lower press-fit guide column (7) is installed on the base plate using a plurality of lower press-fit guide column positioning bolts (8).

7. An assembly tool for a strong permanent magnet assembly (10) according to claim 2 or 6, characterized in that: A through hole is provided in the center of the top plate, through which the tensioning screw rod (3) passes, and a rotating rod is provided on the top of the tensioning screw rod (3).

8. A strong permanent magnet assembly assembly tool according to claim 1 or 2 or 5 or 6, characterized in that: The strong magnetic permanent magnet assembly assembly tooling is all made of non-magnetic conductive materials.

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